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Merge branch 'main' of git.arirex.me:iris/ai-app

Browse Source 
# Conflicts:
#	AGENTS.md
#	PLAN.md
#	app/androidApp/src/main/kotlin/com/example/aiapp/SessionUsageBar.kt
#	app/androidApp/src/main/kotlin/com/example/aiapp/SpawnScreen.kt
#	server/src/config.rs
#	server/src/main.rs
#	server/src/routes.rs
#	server/src/session/echo.rs
#	server/src/session/llama.rs
#	server/src/session/transport.rs
#	server/src/ssh.rs
#	server/src/usage.rs
This commit is contained in:
iris committed 2026-09-04 17:56:50 -04:00
2 parents 127b25e60a 1fcaa2d72d
commit 3c0214ece8
94 files changed
+8299 -9454
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app/androidApp/src/main/kotlin/com/example/aiapp/Ansi.kt
+19 -23
View File
@@ -13,9 +13,8 @@ import androidx.compose.ui.text.style.TextDecoration
*
* Its own palette rather than the syntax one: a program that prints in red has chosen red, where a
* highlighter's colours are this app's reading of somebody else's code. They come out of the same
* Catppuccin values (see `ansiPalette` in `Theme.kt`) so nothing on screen is a colour from
* somewhere else, but the two are not one table and must not become one -- adding a syntax role to
* this list would silently move `ls`'s directory blue.
* Catppuccin values so nothing on screen is a colour from somewhere else, but the two are not one
* table -- adding a syntax role to this list would silently move `ls`'s directory blue.
*/
data class AnsiPalette(
/** Indexes 0-7, then 8-15 bright, in the terminal's own order. */
@@ -30,19 +29,18 @@ data class AnsiPalette(
* What a tool printed, with its terminal styling applied and everything else taken out.
*
* Bash output arrives exactly as the program wrote it, escape sequences included, and drawn
* verbatim those are line noise in the middle of the thing being read: `ESC[0;32m` in front of
* every green word. Stripping them all would be the other half-answer -- colour is often the whole
* of what a diff, a test run or a linter is saying.
* verbatim those are line noise in the middle of the thing being read. Stripping them all would be
* the other half-answer -- colour is often the whole of what a diff or a test run is saying.
*
* So the sequences that decide how text *looks* become spans, and every other one is dropped.
* Dropped rather than shown, because the rest move a cursor around a grid this is not: a transcript
* is a scrolling document, and "go to column 40" has no meaning here that is better than nothing.
* So the sequences that decide how text *looks* become spans, and every other one is dropped rather
* than shown: the rest move a cursor around a grid this is not, and "go to column 40" has no
* meaning in a scrolling document.
*
* A carriage return is honoured the way a terminal honours it: what was written since the last line
* break is thrown away and the line starts again. That is what makes a progress bar show its final
* state rather than every state it passed through, which was tens of lines run together.
* state rather than every state it passed through.
*
* Not a composable, and the palette is a parameter: this can then be remembered against the text it
* Not a composable, and the palette is a parameter, so this can be remembered against the text it
* parsed rather than re-run on every recomposition of the card holding it.
*/
fun ansiStyled(text: String, palette: AnsiPalette): AnnotatedString {
@@ -71,10 +69,9 @@ fun ansiStyled(text: String, palette: AnsiPalette): AnnotatedString {
if (final == 'm') sgr = sgr.apply(params, palette)
}
}
// A bare carriage return rewrites the line. One before a newline is the other half
// of a Windows line ending: it rewrites nothing, and it is dropped rather than kept,
// since that pair is one line break and the return itself would draw as a stray
// control character.
// A bare carriage return rewrites the line. One before a newline is the other half of a
// Windows line ending: it rewrites nothing, and it is dropped rather than kept, since
// that pair is one line break.
c == '\r' && text.getOrNull(at + 1) != '\n' -> {
flush()
dropLine(runs)
@@ -82,8 +79,8 @@ fun ansiStyled(text: String, palette: AnsiPalette): AnnotatedString {
}
c == '\r' -> at++
// Everything printable, plus the two control characters that are layout rather than
// terminal commands. A stray bell or backspace goes for the same reason a cursor
// move does.
// terminal commands. A stray bell or backspace goes for the same reason a cursor move
// does.
c >= ' ' || c == '\n' || c == '\t' -> {
plain.append(c)
at++
@@ -129,9 +126,8 @@ private const val BELL = '\u0007'
* Steps over the escape sequence starting at [at], reporting a CSI's parameters and final byte.
*
* One reader for every kind, because the point is to *leave* them all behind: a sequence this did
* not recognise would otherwise have its body printed as ordinary text, which is worse than the
* escape it was meant to remove. Three shapes -- the CSI (`ESC [ … letter`), the string escapes
* (OSC, DCS, APC, PM) which run to a terminator, and the two-character ones.
* not recognise would otherwise have its body printed as ordinary text. Three shapes -- the CSI
* (`ESC [ … letter`), the string escapes which run to a terminator, and the two-character ones.
*/
private inline fun skipEscape(text: String, at: Int, onCsi: (String, Char) -> Unit): Int {
val next = text.getOrNull(at + 1) ?: return at + 1
@@ -140,9 +136,9 @@ private inline fun skipEscape(text: String, at: Int, onCsi: (String, Char) -> Un
var end = at + 2
while (end < text.length && text[end] !in CSI_FINAL) end++
if (end >= text.length) {
// Cut off mid-sequence, which is what a stream that has not finished arriving
// looks like: drop the fragment rather than printing it, and the whole sequence
// arrives with the next delta.
// Cut off mid-sequence, which is what a stream that has not finished arriving looks
// like: drop the fragment rather than printing it, and the whole sequence arrives
// with the next delta.
text.length
} else {
onCsi(text.substring(at + 2, end), text[end])
app/androidApp/src/main/kotlin/com/example/aiapp/Api.kt
+105 -138
View File
@@ -6,26 +6,23 @@ import java.net.URL
import org.json.JSONArray
import org.json.JSONObject
// The REST half of the backend's surface (see server/src/routes.rs for the
// table); the SSE half is EventStream.kt. All blocking network calls --
// invoke from a background dispatcher. Each throws ApiException on failure,
// carrying the server's own explanation where it sent one, since those
// messages are written to be read on this screen.
// The REST half of the backend's surface (see server/src/routes.rs for the table); the SSE half is
// EventStream.kt. All blocking network calls -- invoke from a background dispatcher. Each throws
// ApiException carrying the server's own explanation where it sent one, since those messages are
// written to be read on this screen.
// Shared with EventStream.kt, which connects the same way but then reads
// without a deadline.
// Shared with EventStream.kt, which connects the same way but then reads without a deadline.
const val CONNECT_TIMEOUT_MS = 5000
private const val READ_TIMEOUT_MS = 5000
/**
* A request that did not produce what it asked for, carrying the server's own wording where it sent
* some -- those messages are written to be read on the screen that made the call.
* some.
*
* [status] is the HTTP status where there was a response at all, and null where the server was
* never reached. Callers that need it need it because the *same* failure is two different things to
* do: a 409 from a write is "somebody else changed this, here are three ways out", where every
* other refusal is a message to show. Nothing should branch on it to decide what to *say* -- the
* message is what says that.
* do: a 409 from a write is "somebody else changed this, here are three ways out". Nothing should
* branch on it to decide what to *say* -- the message is what says that.
*/
class ApiException(message: String, val status: Int? = null, cause: Throwable? = null) :
Exception(message, cause)
@@ -33,10 +30,10 @@ class ApiException(message: String, val status: Int? = null, cause: Throwable? =
/**
* Runs one request against the backend, with the pinned TLS setup, the bearer token, and the
* failure translation every call needs. [readBody] gets the connected, already-status-checked
* connection to read from.
* connection.
*
* @param readTimeoutMs how long to wait on the response body. The SSE stream doesn't come through
* here -- an event stream has no bounded read time (see EventStream.kt).
* here -- an event stream has no bounded read time.
*/
fun <T> requestFromServer(
settings: ServerSettings,
@@ -44,9 +41,9 @@ fun <T> requestFromServer(
method: String = "GET",
jsonBody: String? = null,
/**
* A request body written as it is produced -- the upload path. Content type, and a writer
* handed the connection's stream. Sent chunked, since what a writer will produce is not known
* up front and the point is that a file never sits whole in memory on this side.
* A request body written as it is produced -- the upload path. Sent chunked, since what a
* writer will produce is not known up front and the point is that a file never sits whole in
* memory.
*/
streamBody: Pair<String, (java.io.OutputStream) -> Unit>? = null,
readTimeoutMs: Int = READ_TIMEOUT_MS,
@@ -87,9 +84,8 @@ fun <T> requestFromServer(
} catch (e: ApiException) {
throw e
} catch (e: IOException) {
// Surfacing the real exception (rather than one canned message for
// every failure mode) is what lets this be diagnosed on a device
// with no logcat access.
// Surfacing the real exception rather than one canned message for every failure mode is
// what lets this be diagnosed on a device with no logcat access.
throw ApiException(
"Couldn't reach the server at ${settings.baseUrl} " +
"(${e::class.simpleName}: ${e.message}) -- is ai-server running, and is " +
@@ -107,11 +103,9 @@ fun <T> requestFromServer(
}
}
/** The response body as one JSON object. */
private fun HttpURLConnection.jsonObject(): JSONObject =
JSONObject(inputStream.bufferedReader().readText())
/** The response body as a JSON array of objects, each mapped through [parse]. */
private fun <T> HttpURLConnection.jsonObjects(parse: (JSONObject) -> T): List<T> =
JSONArray(inputStream.bufferedReader().readText()).mapObjects(parse)
@@ -120,21 +114,16 @@ private fun <T> JSONArray.mapObjects(parse: (JSONObject) -> T): List<T> =
private fun JSONArray.strings(): List<String> = (0 until length()).map { getString(it) }
/** Percent-encodes a value going into a query string. */
private fun String.urlEncoded(): String = java.net.URLEncoder.encode(this, Charsets.UTF_8.name())
// One row of GET /sessions. A session names the machine it runs on and
// which of that machine's providers it runs.
// One row of GET /sessions. A session names the machine it runs on and which of that machine's
// providers it runs.
data class SessionSummary(
val id: String,
/**
* Id of the machine this session runs on. Only ever used to *address* that machine -- to pick
* this session's row out of the per-machine usage snapshots for the header's five-hour bar.
*
* It was deliberately left out until 2026-08-29, on the grounds that nothing here addressed a
* setup and holding both the id and the name invited showing the wrong one, which had already
* happened once. Something addresses one now, so the reason lapsed rather than being overruled.
* The guard that replaces it is the rule below: never show this.
* this session's row out of the per-machine usage snapshots. Never shown; [setupName] is what a
* reader sees, and holding both invites showing the wrong one.
*/
val setup: String,
/** The machine's current label. This is the one to display; [setup] is never shown. */
@@ -147,9 +136,8 @@ data class SessionSummary(
* provider's kind rather than here from its name.
*
* What it licenses is narrow, and the delete dialog is worded to match: the driver keeps its
* own record of the conversation somewhere this app's delete does not reach. It is not a
* promise that the file is still there, and re-importing is not a restore -- this app's
* transcript holds things that record does not.
* own record somewhere this app's delete does not reach. It is not a promise that the file is
* still there, and re-importing is not a restore.
*/
val keepsOwnTranscript: Boolean,
/** How much the session asks before acting; null when it was never set. */
@@ -162,35 +150,32 @@ data class SessionSummary(
* Whether this session announces itself when it wants attention.
*
* Reported rather than assumed, for the same reason [permissionMode] is: a switch that draws
* itself from a default is one you can turn off while believing you are reading it. Defaults to
* on when a backend is too old to say, which matches what that backend actually does.
* itself from a default is one you can turn off while believing you are reading it.
*/
val notify: Boolean,
/**
* The directory the session works in, or null where it was never given one.
*
* Null is not "the home directory": it is the session never having been told, and what the
* process then starts in belongs to whatever launches it. Shown as unset rather than filled in
* with a guess, so a reader changing it is choosing rather than confirming.
* Null is not "the home directory": it is the session never having been told. Shown as unset
* rather than filled in with a guess, so a reader changing it is choosing rather than
* confirming.
*/
val cwd: String?,
/**
* How much context this session is holding, as the server last measured it -- see
* `SessionEvent.UsageDelta`.
* How much context this session is holding, as the server last measured it.
*
* Null where nothing has been measured: a session that has not run a turn, a provider that does
* not report usage, or a clear nobody has run a turn since. That is not zero, and the status
* row says so in words rather than drawing an empty context for a conversation that may be
* nearly full.
* full.
*/
val contextTokens: Long?,
/**
* The longest edge an image should have when it reaches this session, or null where the
* provider has no limit.
*
* Null and "a big number" are different answers, and only the first stays true: a provider that
* does not care about size should not be given a threshold this app invented. Decided by the
* server because that is where a provider's kind is known -- see `uploadPickedImage`.
* Null and "a big number" are different answers, and only the first stays true. Decided by the
* server because that is where a provider's kind is known.
*/
val maxImageEdge: Int?,
/**
@@ -237,18 +222,16 @@ fun fetchSessions(settings: ServerSettings): List<SessionSummary> =
*
* For screens whose controls are *set to* something rather than merely showing it. A screen opened
* from a list row carries the row the list last fetched, which is a snapshot: fine for a title,
* wrong for a switch, since a switch drawn from a stale row shows a position that may have been
* changed since -- here or on another device -- and nothing on screen says which.
* wrong for a switch, since a stale row shows a position that may have been changed since.
*/
fun fetchSession(settings: ServerSettings, sessionId: String): SessionSummary =
requestFromServer(settings, "/sessions/$sessionId") { parseSession(it.jsonObject()) }
// What the server offers, so the spawn screen has no hardcoded lists: a
// setup added to the server's config.ron appears here with no app rebuild.
// What the server offers, so the spawn screen has no hardcoded lists: a setup added to the server's
// config.ron appears here with no app rebuild.
//
// One list rather than two. A provider only exists on a machine that has
// it installed, so offering machines and providers as independent choices
// would offer pairs that cannot work.
// One list rather than two. A provider only exists on a machine that has it installed, so offering
// machines and providers as independent choices would offer pairs that cannot work.
data class Provider(val name: String, val kind: String, val models: List<String>)
/**
@@ -287,7 +270,7 @@ fun fetchSetups(settings: ServerSettings): List<Setup> =
* A Claude Code session already on a machine, which can be continued here.
*
* Identified by [id] and never by a path. The server resolves which file that is, so this app has
* no way to ask it to read one -- the same rule that keeps a provider's command out of this client.
* no way to ask it to read one.
*/
data class Importable(
val id: String,
@@ -296,19 +279,15 @@ data class Importable(
val modified: Double,
val lines: Int,
/**
* Size of the session file in bytes.
*
* Worth a place on the row because it is the only thing there that predicts what continuing the
* session costs, and the line count does not: these transcripts embed screenshots as base64, so
* a single line can be a megabyte.
* Size of the session file in bytes. Worth a place on the row because it is the only thing
* there that predicts what continuing the session costs, and the line count does not: these
* transcripts embed screenshots as base64, so a single line can be a megabyte.
*/
val bytes: Long,
/**
* Tokens the model was holding at the last turn, or null if no turn has recorded any.
*
* The number that predicts what continuing this session costs. It disagrees with [bytes] in the
* direction that matters: most of a large transcript is usually history from before a
* compaction, which the model is no longer given.
* Tokens the model was holding at the last turn, or null if no turn has recorded any. It
* disagrees with [bytes] in the direction that matters: most of a large transcript is usually
* history from before a compaction, which the model is no longer given.
*/
val contextTokens: Long?,
/** Whether [title] is a name somebody chose rather than the last thing said in the session. */
@@ -317,17 +296,15 @@ data class Importable(
* Whether a Claude Code is running this session right now.
*
* "unknown" is a third answer and not a synonym for "no": the machine may keep no record of
* what is running, and a session that cannot be checked is not a session that is free. The
* server refuses an import of a "yes"; the row says so before you press it.
* what is running. The server refuses an import of a "yes"; the row says so before you press
* it.
*/
val inUse: String,
/**
* What this server is doing to the session right now -- "importing" or "deleting" -- or null
* when nothing is.
* What this server is doing to the session right now -- "importing" or "deleting" -- or null.
*
* The server's answer rather than the phone's, because the work outlives the screen that asked
* for it: leaving the import list and coming back has to show what is still running, and a
* phone that was asleep or out of range never saw the events that said so.
* for it: a phone that was asleep never saw the events that said so.
*/
val pending: String?,
/**
@@ -340,7 +317,7 @@ data class Importable(
/**
* One frame of `GET /setups/{id}/importable/events`: an operation starting, finishing or failing.
*
* [operation] is only set by a start, and [message] only by a failure -- the three states are every
* [operation] is only set by a start and [message] only by a failure -- the three states are every
* way an operation can be, and each carries exactly what that state knows.
*/
data class ImportableChange(
@@ -360,20 +337,18 @@ fun parseImportableChange(payload: String): ImportableChange? =
message = frame.optString("message").takeIf { it.isNotEmpty() },
)
} catch (_: org.json.JSONException) {
// A frame this build does not understand is not a reason to drop the stream: the listing
// is the truth and will say what happened whatever this missed.
// A frame this build does not understand is not a reason to drop the stream: the listing is
// the truth and will say what happened whatever this missed.
null
}
/**
* What a machine has that could be continued.
*
* The slowest call this app makes, and it was the only expensive one left on the 5 second default —
* which is how it came to time out against a server that was answering perfectly well. Listing
* means reading every transcript Claude Code has ever written: about four seconds against a
* gigabyte of them before the tunnel adds anything, and that figure grows with every session
* anybody has. A timeout is for a server that has stopped answering, so it is set well clear of how
* long the work takes rather than just above it.
* The slowest call this app makes, and it was the only expensive one left on the 5 second default
* -- which is how it came to time out against a server answering perfectly well. Listing means
* reading every transcript Claude Code has ever written: about four seconds against a gigabyte of
* them before the tunnel adds anything. A timeout is for a server that has stopped answering.
*/
fun fetchImportable(settings: ServerSettings, setup: String): List<Importable> =
requestFromServer(settings, "/setups/$setup/importable", readTimeoutMs = 60000) {
@@ -385,13 +360,11 @@ fun fetchImportable(settings: ServerSettings, setup: String): List<Importable> =
modified = session.optDouble("modified", 0.0),
lines = session.optInt("lines", 0),
bytes = session.optLong("bytes", 0L),
// Absent means nothing has been measured -- which is not a context of zero, so
// it stays null and the row simply does not claim a figure.
// Absent means nothing has been measured, which is not a context of zero.
contextTokens =
if (session.isNull("contextTokens")) null
else session.optLong("contextTokens").takeIf { it > 0L },
// Absent means an older backend that cannot answer, which is exactly what
// "unknown" says -- so the default is the honest one rather than "no".
// Absent means an older backend that cannot answer, which is what "unknown" says.
inUse = session.optString("inUse", "unknown"),
named = session.optBoolean("named", false),
pending = session.optString("pending").takeIf { it.isNotEmpty() },
@@ -547,8 +520,7 @@ fun sendMessage(
*
* Throws rather than returning an outcome, because both ways of failing are things the reader has
* to be told: 409 means the session was already given it, and 404 means nothing is waiting under
* that id. The bubble disappearing is the success case and it arrives on the event stream, not from
* here -- every device drops it, not only the one that tapped.
* that id. The bubble disappearing arrives on the event stream, so every device drops it.
*/
fun unqueueMessage(settings: ServerSettings, sessionId: String, messageId: String) {
requestFromServer(
@@ -562,13 +534,11 @@ fun unqueueMessage(settings: ServerSettings, sessionId: String, messageId: Strin
/**
* Moves a session to a different working directory.
*
* The server checks the directory is there on that machine and refuses if it is not -- a mistyped
* path accepted here would surface much later, as a session that would not start, with nothing
* pointing at the typo.
* The server checks the directory is there and refuses if it is not -- a mistyped path accepted
* here would surface much later, as a session that would not start.
*
* Its process is **stopped**, because a working directory is settled when the process is spawned.
* The next thing said to the session starts it again in the new one, which is this app's rule for a
* session with no process everywhere else.
* The next thing said to the session starts it again in the new one.
*/
fun setSessionCwd(settings: ServerSettings, sessionId: String, cwd: String) {
requestFromServer(
@@ -612,8 +582,8 @@ fun uploadAttachment(
write(out)
out.write(tail)
},
// Long: a trace is hundreds of megabytes, and the server copies it on to a remote
// machine before answering.
// Long: a trace is hundreds of megabytes, and the server copies it on to a remote machine
// before answering.
readTimeoutMs = 600000,
) { connection ->
connection.jsonObject().getString("id")
@@ -624,8 +594,7 @@ fun uploadAttachment(
* One entry of a directory on the machine a setup names.
*
* [kind] is the *target's* where the entry is a symlink, so a link to a directory descends; [link]
* still says it is one. Neither is worked out here -- the machine answers both, because it is the
* only thing that can.
* still says it is one. Neither is worked out here -- the machine answers both.
*/
data class DirEntry(
val name: String,
@@ -644,10 +613,10 @@ data class Listing(val path: String, val entries: List<DirEntry>)
/**
* What reading a file produced.
*
* Four cases, because they are four different things to draw and none of them is an error the
* screen can shrug off: content, something that is not text, something too big to have sent, and
* (as [ApiException], not a case here) the machine's own refusal. A file with nothing in it is
* [FileContent.Text] with an empty string -- which is what it is, and not the same as any of these.
* Four cases, because they are four different things to draw and none is an error the screen can
* shrug off: content, something that is not text, something too big to have sent, and (as
* [ApiException]) the machine's own refusal. A file with nothing in it is [FileContent.Text] with
* an empty string, which is what it is.
*/
sealed class FileContent {
abstract val path: String
@@ -707,9 +676,8 @@ fun fetchFile(settings: ServerSettings, setup: String, path: String): FileConten
requestFromServer(
settings,
"/setups/${setup.urlEncoded()}/file?path=${path.urlEncoded()}",
// A megabyte over the tunnel, and a `stat` plus a `sha256sum` on the far machine before
// any of it moves. Well clear of that rather than just above it -- a timeout is for a
// server that has stopped answering.
// A megabyte over the tunnel, and a `stat` plus a `sha256sum` on the far machine before any
// of it moves. Well clear of that rather than just above it.
readTimeoutMs = 60000,
) { connection ->
val body = connection.jsonObject()
@@ -728,8 +696,7 @@ fun fetchFile(settings: ServerSettings, setup: String, path: String): FileConten
"binary" -> FileContent.Binary(at, size, modified)
"tooBig" -> FileContent.TooBig(at, size, modified)
// A backend that has learned a fifth answer. Reported rather than guessed at: picking
// the nearest of the four would draw something confident about a state this app has
// never seen.
// the nearest of the four would draw something confident about a state never seen.
else ->
throw ApiException(
"The server described this file as \"$kind\", which this app does not know how to show."
@@ -740,9 +707,8 @@ fun fetchFile(settings: ServerSettings, setup: String, path: String): FileConten
/**
* Replaces a file's contents, but only while it still hashes to [ifSha256].
*
* The refusal is a 409 and arrives as an [ApiException] carrying the server's wording, which is
* what the conflict dialog shows -- an agent editing the same file while somebody reads it is the
* ordinary case here, not the exotic one.
* The refusal is a 409 carrying the server's wording, which is what the conflict dialog shows -- an
* agent editing the same file while somebody reads it is the ordinary case here.
*/
fun writeFile(
settings: ServerSettings,
@@ -789,7 +755,6 @@ fun createDir(settings: ServerSettings, setup: String, path: String) {
) {}
}
/** Fetches an image the transcript references (produced or uploaded). */
fun fetchSessionFile(settings: ServerSettings, sessionId: String, name: String): ByteArray =
requestFromServer(settings, "/sessions/$sessionId/files/$name", readTimeoutMs = 30000) {
it.inputStream.readBytes()
@@ -798,10 +763,9 @@ fun fetchSessionFile(settings: ServerSettings, sessionId: String, name: String):
// One rate-limit window, rendered as a labeled bar on the usage screen.
data class UsageWindow(
/**
* The API's own word for which window this is -- "session" for the five-hour one.
*
* How to find a particular window. The label beside it is written for a person to read, so
* matching on it would select nothing the day its wording changes.
* The API's own word for which window this is -- "session" for the five-hour one. The label
* beside it is written for a person to read, so matching on it would select nothing the day its
* wording changes.
*/
val kind: String,
val label: String,
@@ -820,8 +784,8 @@ data class UsageSnapshot(
* What came back: "ok", "notLoggedIn", "unreachable" or "failed".
*
* Four rather than a flag, because the screen has to treat them differently. "notLoggedIn" is a
* machine somebody chose not to put an account on -- a fact, not a fault -- while the other two
* are faults worth chasing. Collapsing them made a healthy setup read as broken.
* machine somebody chose not to put an account on -- a fact, not a fault. Collapsing them made
* a healthy setup read as broken.
*/
val state: String,
/** Why, for the two states that are faults. Absent otherwise. */
@@ -837,8 +801,8 @@ fun fetchUsage(settings: ServerSettings): List<UsageSnapshot> =
provider = snapshot.getString("provider"),
setup = snapshot.optString("setup"),
setupName = snapshot.optString("setupName"),
// Unknown to an older backend, and unknown is not "fine": defaulting to "ok"
// would draw an empty card as a healthy one.
// Unknown to an older backend, and unknown is not "fine": defaulting to "ok" would
// draw an empty card as a healthy one.
state = snapshot.optString("state").ifEmpty { "failed" },
detail = snapshot.optString("detail").ifEmpty { null },
windows =
@@ -859,8 +823,7 @@ fun fetchUsage(settings: ServerSettings): List<UsageSnapshot> =
* Answers one question with everything that was chosen.
*
* A list even when one thing was picked, because that is the shape of the answer rather than a
* special case of it. What a provider makes of several answers is its own business and is decided
* on the server; nothing here joins, splits or reformats them for one.
* special case of it. What a provider makes of several answers is decided on the server.
*/
fun answerQuestion(
settings: ServerSettings,
@@ -887,9 +850,8 @@ fun interruptSession(settings: ServerSettings, sessionId: String) {
/**
* Ends the process behind a session, leaving the session and its transcript.
*
* Not a delete and not an interrupt: the conversation stays exactly where it is and [startSession]
* picks it back up. The server reports what it could not do -- there was nothing running, or the
* machine would not say whether there was -- rather than answering the same way either way.
* Not a delete and not an interrupt: the conversation stays where it is and [startSession] picks it
* back up. The server reports what it could not do rather than answering the same way either way.
*/
fun stopSession(settings: ServerSettings, sessionId: String) {
requestFromServer(settings, "/sessions/$sessionId/stop", method = "POST") {}
@@ -907,12 +869,10 @@ fun startSession(settings: ServerSettings, sessionId: String) {
* caller confirms first; see ImportScreen.
*
* The work runs on the server, so this returning is not the same as it being done -- what says that
* is each row's own state, through [fetchImportable] and the change stream. That is the point:
* leaving the screen used to cancel the delete it had started.
* is each row's own state. That is the point: leaving the screen used to cancel the delete.
*
* One request for the whole batch, which is what makes a handover all-or-nothing. Sending one per
* row meant a batch could half-arrive -- four deleted, two never asked for -- and the two that were
* missed looked exactly like two that had not been picked.
* One request for the whole batch, which is what makes a handover all-or-nothing. One per row meant
* a batch could half-arrive, and the rows that were missed looked exactly like rows not picked.
*/
fun deleteImportable(settings: ServerSettings, setup: String, sessionIds: List<String>) {
requestFromServer(
@@ -929,8 +889,7 @@ fun deleteImportable(settings: ServerSettings, setup: String, sessionIds: List<S
* Separate from [spawnSession] because the two are asked different questions. That one means "start
* this and take me to it", so it waits and answers with the session. This is the import list's
* batch: several at once, nobody waiting on any particular one, and the result arrives as a row
* changing rather than as a reply -- which is what lets the screen be left. One request for all of
* them, for the reason [deleteImportable] gives.
* changing -- which is what lets the screen be left.
*/
fun startImport(
settings: ServerSettings,
@@ -960,7 +919,7 @@ fun startImport(
*
* One request instead of one stream frame per event. The SSE stream is the right shape for live
* events and the wrong one for a backlog: opening an imported session replayed hundreds of frames
* before anything was readable, which looked exactly like the app loading top-down, because it was.
* before anything was readable, which looked exactly like the app loading top-down.
*
* [before] pages backwards for history somebody scrolls to; absent means the newest page.
*/
@@ -969,21 +928,30 @@ fun fetchTranscript(
sessionId: String,
before: Long? = null,
limit: Int = 80,
// Count [limit] in rows, not events, joining a reply's streamed deltas into one -- so a page
// of a delta-heavy conversation is a page of the screen rather than a fraction of one message.
// The scroll-back pager wants this; the anchor restore does not (it counts events to a known
// seq). Ignored by the server for the newest window, where the live cursor needs real seqs.
// See the server's `read_window`.
// Count [limit] in rows, not events, joining a reply's streamed deltas into one -- so a page of
// a delta-heavy conversation is a page of the screen rather than a fraction of one message. The
// scroll-back pager wants this; the anchor restore does not. Ignored by the server for the
// newest window, where the live cursor needs real seqs.
coalesce: Boolean = false,
): List<SeqEvent> {
// Return nothing at or below this seq, stopping the page here instead of at [limit]. The phone
// passes the end of the run it already holds cached, so a page never overlaps that copy -- an
// overlap it cannot store, since a coalesced event cannot be cut inside its own delta run.
after: Long? = null,
): List<Pair<String, SeqEvent>> {
val query = buildString {
append("?limit=").append(limit)
if (before != null) append("&before=").append(before)
if (coalesce) append("&coalesce=true")
if (after != null) append("&after=").append(after)
}
return requestFromServer(settings, "/sessions/$sessionId/transcript$query") { connection ->
val body = JSONArray(connection.inputStream.bufferedReader().readText())
(0 until body.length()).map { parseSeqEvent(body.getJSONObject(it).toString()) }
// The text as well as the event: the transcript cache stores the one and the fold needs the
// other, and they have to be the same line.
(0 until body.length()).map {
val line = body.getJSONObject(it).toString()
line to parseSeqEvent(line)
}
}
}
@@ -993,7 +961,7 @@ fun fetchTranscript(
* The name is the backend's own -- it is what the list shows and it exists before any process does
* -- so this settles it rather than asking. Where the thing running the session has a name of its
* own, the backend passes it on, which is what makes a session the same session in Claude Code's
* picker and to any other agent that lists it.
* picker.
*/
fun renameSession(settings: ServerSettings, sessionId: String, title: String) {
requestFromServer(
@@ -1085,10 +1053,9 @@ fun deleteSession(settings: ServerSettings, sessionId: String, deleteForeign: Bo
requestFromServer(settings, "/sessions/$sessionId$query", method = "DELETE") {}
}
// Models: what this backend has downloaded, what it is downloading, and
// what HuggingFace offers. Browsing is proxied by the server rather than
// done here, because this app trusts exactly one certificate and has no
// general internet trust to spend on huggingface.co.
// Models: what this backend has downloaded, what it is downloading, and what HuggingFace offers.
// Browsing is proxied by the server rather than done here, because this app trusts exactly one
// certificate and has no general internet trust to spend on huggingface.co.
data class LocalModel(val key: String, val repo: String, val file: String, val bytes: Long)
app/androidApp/src/main/kotlin/com/example/aiapp/AppRoot.kt
+31 -40
View File
@@ -29,11 +29,9 @@ import kotlinx.coroutines.withContext
* One `when` rather than a navigation library: a handful of screens, with [Screen.Main] as the root
* and the back button the only other way between them.
*
* Import, models and setups are not here any more. They are tabs inside [MainScreen] -- four views
* of the same backend, none of them a step down from another -- and what is left in this `when` is
* only what genuinely is a step down: one session, spawning one, and settings. A session's own
* settings are not among them: they are a dialog over the session, which is where the thing they
* change is.
* Import, models and setups are tabs inside [MainScreen] -- four views of the same backend, none of
* them a step down from another -- and what is left here is only what genuinely is a step down: one
* session, spawning one, and settings.
*/
private sealed class Screen {
data object Main : Screen()
@@ -43,10 +41,8 @@ private sealed class Screen {
*
* The explorer is a layer on this screen rather than a screen of its own, so the session under
* it stays composed: its event stream keeps flowing, its scroll position and draft stay put,
* and coming back from a file costs nothing. As a sibling `Screen` it would be disposed and
* re-created on every return, refetching the transcript over the tunnel -- which is exactly the
* flip between "what did it change" and "what is it saying" that this feature exists for. The
* image viewer already made the same choice for the same reason.
* and coming back from a file costs nothing. As a sibling `Screen` it would be disposed and re-
* created on every return, refetching the transcript over the tunnel.
*/
data class Session(val summary: SessionSummary, val files: FilesTarget? = null) : Screen()
@@ -60,7 +56,7 @@ private sealed class Screen {
*
* The notification names an id and nothing else, so opening it means fetching the session first.
* [serial] tells two taps on the same session's notification apart, since they are two requests and
* would otherwise compare equal -- see MainActivity, which counts them.
* would otherwise compare equal.
*/
data class SessionOpenRequest(val sessionId: String, val serial: Int)
@@ -68,8 +64,8 @@ data class SessionOpenRequest(val sessionId: String, val serial: Int)
private data class FailedOpen(val request: SessionOpenRequest, val message: String)
/**
* [settingsVersion] bumps when enrollment lands via an `aiapp://` intent (see MainActivity),
* re-reading the stored settings -- a plain `remember` would keep serving the pre-enrollment null.
* [settingsVersion] bumps when enrollment lands via an `aiapp://` intent (see MainActivity), re-
* reading the stored settings -- a plain `remember` would keep serving the pre-enrollment null.
*
* [openRequest] is the session a notification tap asked for, likewise from MainActivity.
*
@@ -89,8 +85,8 @@ fun AppRoot(
// A notification tap this could not follow, and why. Null both before one is asked for and
// after one succeeds, since success is a screen rather than a message.
var failedOpen by remember { mutableStateOf<FailedOpen?>(null) }
// Bumped whenever another screen changes something the list shows, so
// returning to it refetches instead of showing a stale list.
// Bumped whenever another screen changes something the list shows, so returning to it
// refetches.
var reloadToken by remember { mutableIntStateOf(0) }
// Cleared by the session screen that attached it, not when a newer request arrives: a share
// must be attached exactly once, and only the screen that did it knows that it has.
@@ -104,9 +100,8 @@ fun AppRoot(
}
}
// A standing condition rather than a per-request failure, so it is
// stated once here instead of appended to every error that might be
// caused by it. Without this the app is simply unreachable and every
// A standing condition rather than a per-request failure, so it is stated once here instead of
// appended to every error it might cause. Without this the app is simply unreachable and every
// screen blames the server or the tunnel for it.
if (!localNetworkAllowed(context)) {
Text(
@@ -121,8 +116,8 @@ fun AppRoot(
val current = settings
if (current == null) {
// Not enrolled yet: settings is the only usable screen. The QR
// path lands in MainActivity and recomposes from the top.
// Not enrolled yet: settings is the only usable screen. The QR path lands in MainActivity
// and recomposes from the top.
Box(Modifier.imePadding()) {
SettingsScreen(
existing = null,
@@ -136,10 +131,9 @@ fun AppRoot(
return
}
// The one way back, whichever screen is showing and whether it was
// reached by the system back gesture or a screen's own Back button.
// Every leaf screen can have changed something the list shows, so it
// always refetches.
// The one way back, whichever screen is showing and whether it was reached by the system back
// gesture or a screen's own Back button. Every leaf screen can have changed something the list
// shows, so it always refetches.
val goToMain = {
reloadToken++
screen = Screen.Main
@@ -149,8 +143,8 @@ fun AppRoot(
}
// Turning a notification into the screen it points at. The id has to be resolved to a session
// first, because that is what SessionScreen is given -- and unlike a list row, which is a
// snapshot the list already fetched, there is nothing here to seed it from.
// first, because that is what SessionScreen is given -- and unlike a list row, there is nothing
// here to seed it from.
//
// A failure is reported rather than swallowed: somebody deliberately tapped a notification, so
// an app that opens to the session list with no explanation looks like the tap missed.
@@ -180,10 +174,9 @@ fun AppRoot(
)
}
// Every screen but the session takes the keyboard as bottom padding here. The session
// screen deliberately does not: resizing a whole screen on every frame of the keyboard
// animation is the cost that made it lag, so it moves only its composer and transcript --
// see the layout note in SessionScreen.
// Every screen but the session takes the keyboard as bottom padding here. The session screen
// deliberately does not: resizing a whole screen on every frame of the keyboard animation is
// the cost that made it lag, so it moves only its composer and transcript.
when (val here = screen) {
is Screen.Main ->
Box(Modifier.imePadding()) {
@@ -202,15 +195,14 @@ fun AppRoot(
}
is Screen.Session ->
// Keyed on the id, because a different session is a different screen rather than this
// one showing other rows. SessionScreen remembers a transcript, an open event stream, a
// draft and a scroll position, and without the key Compose keeps all of it across the
// change and merges two conversations -- which crashes the list on the first duplicate
// row key. Only reachable since a notification can move straight from one session to
// another; every other way here passes through [Screen.Main], which disposes it anyway.
// one showing other rows. SessionScreen remembers a transcript, an open stream, a draft
// and a scroll position, and without the key Compose keeps all of it across the change
// and merges two conversations -- which crashes the list on the first duplicate row
// key. Only reachable since a notification can move straight from one session to
// another.
key(here.summary.id) {
// A Box so the explorer can be drawn *over* the session rather than instead of
// it; the session stays composed underneath. No imePadding here, for the reason
// above -- the explorer adds its own, since it has a text field.
// A Box so the explorer can be drawn *over* the session rather than instead of it.
// No imePadding here, for the reason above -- the explorer adds its own.
Box {
SessionScreen(
settings = current,
@@ -257,8 +249,7 @@ fun AppRoot(
// Last, so it draws over the screen above rather than under it: these are stacked in the Box
// the activity puts around this, and that Box paints in the order it was given. A session
// wanting attention is not a fact about the page somebody happens to be on, so it is not the
// page's job to leave room for it. Tapping one is the same act as tapping a notification, so
// it goes through the same `open`, failure dialog included.
// wanting attention is not a fact about the page somebody happens to be on. Tapping one is the
// same act as tapping a notification, so it goes through the same `open`.
SessionAlerts(onOpen = { request -> scope.launch { open(request) } })
}
app/androidApp/src/main/kotlin/com/example/aiapp/AskQuestion.kt
+33 -43
View File
@@ -41,13 +41,12 @@ data class QuestionAnswer(val questionId: String, val answers: List<String>)
* What the reader has settled on for one question, before any of it is sent.
*
* Held here rather than inferred from the transcript, which is what made picking an option feel
* broken: the mark used to appear only when the answer had crossed the tunnel, been recorded and
* come back as an event, so on a phone the card sat unchanged for most of a second after a tap and
* the natural response was to tap again.
* broken: the mark used to appear only when the answer had crossed the tunnel and come back as an
* event, so the card sat unchanged for most of a second after a tap.
*
* Picked options and typed words are one field each because they are alternatives rather than
* parts: answering in the reader's own words is the case no option covers, so typing puts the picks
* away and picking puts the words away, and there is never a draft that means two things.
* parts: typing puts the picks away and picking puts the words away, so there is never a draft that
* means two things.
*/
data class Draft(val picked: Set<String> = emptySet(), val other: String = "") {
val settled: Boolean
@@ -65,29 +64,26 @@ data class Draft(val picked: Set<String> = emptySet(), val other: String = "") {
/**
* Every question one tool call is waiting on, one at a time.
*
* All of it comes from the question events themselves -- what each option means, what picking it
* would produce, whether several may be picked at once. None of it is read out of the call's own
* All of it comes from the question events themselves. None of it is read out of the call's own
* input, which is one provider's JSON: parsing that here would put that provider's schema in the
* app, where no other provider can reach it and where it drifts the first time the schema moves.
*
* One question on screen with arrows to the others, rather than all of them stacked. A card asking
* three questions with four options and a description each is several screens tall, so the reader
* scrolls past the question they are answering to reach the button that sends it, and never sees
* the whole of any one of them. Paged, each question is a screen and the count says how many are
* left -- which is also what makes "not all of them are answered" something the reader can act on
* rather than something to go hunting for.
* scrolls past the question they are answering to reach the button that sends it. Paged, each
* question is a screen and the count says how many are left.
*
* Nothing is sent until Submit. Answering is one act even when it is several questions: the tool
* asked them together and is waiting on all of them, and sending each as it was tapped meant the
* reader could not change their mind about the first after reading the third.
* asked them together, and sending each as it was tapped meant the reader could not change their
* mind about the first after reading the third.
*/
@Composable
fun AskUserQuestionBody(
asks: List<TranscriptItem.QuestionCard>,
onAnswer: (List<QuestionAnswer>, onSettled: () -> Unit) -> Unit,
) {
// Seeded from what was already answered, so a card the reader comes back to shows their
// answers rather than an empty draft over them.
// Seeded from what was already answered, so a card the reader comes back to shows their answers
// rather than an empty draft over them.
var drafts by
remember(asks.map { it.id }) {
mutableStateOf(
@@ -125,7 +121,7 @@ fun AskUserQuestionBody(
modifier = Modifier.weight(1f),
)
// Disabled at the ends rather than absent, so the pair keeps its place and the
// reader can see that there is nothing further that way.
// reader can see there is nothing further that way.
MarkButton("Previous question", { at-- }, enabled = at > 0) {
Chevron(Pointing.Left, colour = LocalContentColor.current)
}
@@ -143,7 +139,7 @@ fun AskUserQuestionBody(
if (outstanding.isNotEmpty()) {
Spacer(Modifier.height(12.dp))
// Greyed until every question has an answer, because the tool is waiting on all of
// them: a submit that sent two of three would leave the third one asked and the card
// them: a submit that sent two of three would leave the third asked and the card
// looking dealt with.
val ready = outstanding.all { drafts[it.id]?.settled == true }
Button(
@@ -155,8 +151,8 @@ fun AskUserQuestionBody(
}
) {
// Back to a button whatever happened. A refusal is reported by the screen
// around this, and the draft is still here to send again -- a spinner
// that never stops would be the only sign of a failure this card cannot
// around this, and the draft is still here to send again -- a spinner that
// never stops would be the only sign of a failure this card cannot
// describe.
sending = false
}
@@ -165,8 +161,8 @@ fun AskUserQuestionBody(
modifier = Modifier.fillMaxWidth(),
) {
if (sending) {
// In the button rather than beside it, so the row does not change height at
// the moment it is pressed.
// In the button rather than beside it, so the row does not change height at the
// moment it is pressed.
CircularProgressIndicator(
Modifier.height(18.dp).width(18.dp),
strokeWidth = 2.dp,
@@ -186,8 +182,7 @@ fun AskUserQuestionBody(
* One question: what is being asked, what can be answered, and what was.
*
* The same body wherever a question appears -- on the call that asked it, or as a card of its own
* when nothing did. A question is the same thing either way, and two renderings of it would be two
* places for an answer to go missing.
* when nothing did. Two renderings of it would be two places for an answer to go missing.
*
* [draft] is what the reader has picked so far and [onDraft] is how they change it; nothing here
* sends anything. An answered question ignores both and draws what was answered.
@@ -214,10 +209,10 @@ fun AskedQuestion(
// replacing them with a line repeating it. The options are what the question *was*, and
// dropping them leaves an answer with nothing to have been an answer to -- "Sonnet" says
// very little without the three it was chosen over. Marked in the same purple that says
// "picked" while the question is still open, so it is one appearance learned once.
// "picked" while the question is open, so it is one appearance learned once.
val answered = ask.answers.isNotEmpty()
// What is marked: what was answered once there is an answer, and what the finger has
// chosen until then.
// What is marked: what was answered once there is an answer, and what the finger has chosen
// until then.
val marked = if (answered) ask.answers.toSet() else draft.picked
// Null once the question is answered: the options stay and stop being pressable.
val onPick: ((String) -> Unit)? =
@@ -233,9 +228,9 @@ fun AskedQuestion(
}
}
}
// What was answered in the reader's own words, which no option can mark -- see
// [OtherAnswer]. Only ever the answers that match nothing offered, so a question answered
// by picking says it by the mark alone.
// What was answered in the reader's own words, which no option can mark. Only ever the
// answers that match nothing offered, so a question answered by picking says it by the
// mark.
val inWords = ask.answers.filterNot { answer -> ask.options.any { it.label == answer } }
if (inWords.isNotEmpty()) {
Text(
@@ -252,10 +247,8 @@ fun AskedQuestion(
}
/**
* [label] added to, or taken out of, what [draft] has picked.
*
* A single-answer question replaces rather than accumulates, and either way picking puts any typed
* words away -- see [Draft].
* [label] added to, or taken out of, what [draft] has picked. A single-answer question replaces
* rather than accumulates, and either way picking puts any typed words away -- see [Draft].
*/
private fun pick(draft: Draft, label: String, multiSelect: Boolean): Draft =
when {
@@ -269,8 +262,7 @@ private fun pick(draft: Draft, label: String, multiSelect: Boolean): Draft =
*
* Outlined rather than tinted. Drawn first as a card one step up the surface ladder, it was
* indistinguishable from the card behind it -- three paragraphs of text where three things to press
* should have been, which is the failure a tint step routinely produces on a dark theme. A border
* is one cue and it is unambiguous.
* should have been. A border is one cue and it is unambiguous.
*/
@Composable
private fun OptionCard(option: QuestionOption, selected: Boolean, onPick: () -> Unit) {
@@ -324,8 +316,8 @@ private fun Preview(preview: String) {
preview,
style = MaterialTheme.typography.bodySmall,
fontFamily = FontFamily.Monospace,
// Not wrapped: these are mockups and diffs, where a wrapped line reads as two lines
// of the thing being previewed.
// Not wrapped: these are mockups and diffs, where a wrapped line reads as two lines of
// the thing being previewed.
softWrap = false,
modifier = Modifier.padding(8.dp).horizontalScroll(rememberScrollState()),
)
@@ -336,8 +328,7 @@ private fun Preview(preview: String) {
* The choice the asker always leaves open, and the app has to as well.
*
* Every AskUserQuestion carries an implicit "Other" -- the reader may answer in their own words
* rather than pick. Leaving it out narrows a question that was never that narrow, and the reader
* cannot tell that it was ever open.
* rather than pick. Leaving it out narrows a question that was never that narrow.
*/
@Composable
private fun OtherAnswer(text: String, onText: (String) -> Unit) {
@@ -358,8 +349,7 @@ private fun OtherAnswer(text: String, onText: (String) -> Unit) {
*
* A Row hands out intrinsic widths in order and clips whatever runs past the edge, so a question
* with four options showed the first one or two and dropped the rest off the side of the screen.
* That does not read as a bug: it reads as those having been the only choices, which is the worst
* way for a list of choices to be wrong.
* That reads as those having been the only choices.
*/
@Composable
fun AnswerOptions(
@@ -379,8 +369,8 @@ fun AnswerOptions(
OutlinedButton(
onClick = { onPick?.invoke(option.label) },
// Disabled rather than removed, so an answered question still shows what it
// offered. Material dims a disabled button's own border and label, which would
// take the mark with it -- both are stated here instead.
// offered. Material dims a disabled button's own border and label, which would take
// the mark with it -- both are stated here instead.
enabled = onPick != null,
border =
BorderStroke(
app/androidApp/src/main/kotlin/com/example/aiapp/Attachment.kt
+3 -4
View File
@@ -28,8 +28,8 @@ fun attachmentName(ref: String): String = ref.substringAfter('-', ref)
/**
* One attachment on a sent message, drawn as what it is: an image inline, a file as its name. A
* file is not fetched -- there is nothing on this phone to open a trace or a log with -- so the
* name is the whole of it.
* file is not fetched -- there is nothing on this phone to open a trace with -- so the name is all
* of it.
*/
@Composable
fun Attachment(
@@ -50,8 +50,7 @@ fun Attachment(
/**
* A file's name, one line, in the face names are read in. Overlong names lose their middle: a name
* is identified by both ends -- what it is at the front, what kind at the back -- and either
* ellipsis alone takes away one of them.
* is identified by both ends -- what it is at the front, what kind at the back.
*/
@Composable
fun FileName(name: String, modifier: Modifier = Modifier) {
app/androidApp/src/main/kotlin/com/example/aiapp/Attachments.kt
+17 -21
View File
@@ -20,10 +20,8 @@ import kotlin.math.max
* to be either thrown away or rejected -- which is what "sending an image is broken" was.
*
* Shrunk here rather than on the backend, so the bytes that never mattered are never sent: the
* expensive part of this on a phone is the upload, not the decode. What the limit *is* comes from
* the server, per session -- see `DriverKind::max_image_edge` -- because that is where a provider's
* requirements are known, and a phone that carried its own copy of them would be a second place to
* update when one changes.
* expensive part on a phone is the upload, not the decode. What the limit *is* comes from the
* server, per session, because that is where a provider's requirements are known.
*/
suspend fun uploadPickedImage(
context: Context,
@@ -53,17 +51,16 @@ suspend fun uploadPicked(
if (mime != null && mime.startsWith("image/")) {
return uploadPickedImage(context, settings, sessionId, uri, maxEdge)
}
// Opened before the request starts, so a provider that refuses says so here and not from
// inside the connection; then streamed, since a trace or a log is bigger than this process
// should hold at once.
// Opened before the request starts, so a provider that refuses says so here and not from inside
// the connection; then streamed, since a trace is bigger than this process should hold at once.
val source = openSource(resolver, uri)
val name = displayName(resolver, uri)
return uploadAttachment(settings, sessionId, mime ?: "application/octet-stream", name) { out ->
try {
source.use { it.copyTo(out, COPY_BUFFER) }
} catch (e: java.io.IOException) {
// Either side of the copy can fail; the message names the file, which is the
// part the reader can do something about.
// Either side of the copy can fail; the message names the file, which is the part the
// reader can do something about.
throw ApiException("couldn't send $name: ${e.message}", cause = e)
}
}
@@ -76,7 +73,7 @@ private const val COPY_BUFFER = 64 * 1024
*
* A share arrives with whatever access the other app granted, and a provider that refuses says so
* with a `SecurityException`; a file gone between the pick and the read is an `IOException`. Both
* are things the reader can act on, so neither is left to end the process.
* are things the reader can act on.
*/
private fun openSource(resolver: ContentResolver, uri: Uri): java.io.InputStream =
try {
@@ -110,9 +107,9 @@ private fun displayName(resolver: ContentResolver, uri: Uri): String {
/**
* The bytes to upload and what they are, scaled down only if they need to be.
*
* An image already inside the limit is uploaded exactly as it came, rather than decoded and
* re-encoded to the same size: a round trip through JPEG loses a little every time, and there is
* nothing to gain from it. This is also the path a provider with no limit always takes.
* An image already inside the limit is uploaded exactly as it came, rather than decoded and re-
* encoded to the same size: a round trip through JPEG loses a little every time. This is also the
* path a provider with no limit always takes.
*/
private fun readForUpload(context: Context, uri: Uri, maxEdge: Int?): Pair<ByteArray, String> {
val resolver = context.contentResolver
@@ -128,9 +125,9 @@ private fun readForUpload(context: Context, uri: Uri, maxEdge: Int?): Pair<ByteA
// decision it has no business making.
if (longest <= 0 || longest <= maxEdge) return original to mime
// Powers of two first, which is all the decoder can do, and then the exact scale. Decoding
// the full twelve megapixels only to shrink it is how this runs out of memory on the images
// it most needs to handle.
// Powers of two first, which is all the decoder can do, and then the exact scale. Decoding the
// full twelve megapixels only to shrink it is how this runs out of memory on the images it most
// needs to handle.
val decode =
BitmapFactory.Options().apply {
inSampleSize = Integer.highestOneBit(max(1, longest / maxEdge))
@@ -141,9 +138,8 @@ private fun readForUpload(context: Context, uri: Uri, maxEdge: Int?): Pair<ByteA
val matrix = Matrix()
if (scale < 1f) matrix.postScale(scale, scale)
// The camera writes which way up the picture is into EXIF rather than rotating the pixels, and
// re-encoding drops the tag -- so a portrait photo would arrive at the model on its side, with
// nothing anywhere saying so. Applied to the same matrix as the scale, so it costs no second
// copy of the bitmap.
// re-encoding drops the tag -- so a portrait photo would arrive at the model on its side.
// Applied to the same matrix as the scale, so it costs no second copy of the bitmap.
matrix.postRotate(exifRotation(original))
val scaled = Bitmap.createBitmap(decoded, 0, 0, decoded.width, decoded.height, matrix, true)
val out = ByteArrayOutputStream()
@@ -166,8 +162,8 @@ private fun exifRotation(bytes: ByteArray): Float =
else -> 0f
}
} catch (_: java.io.IOException) {
// No EXIF, or none this can read. Upright is the assumption every
// image without the tag is displayed under anyway.
// No EXIF, or none this can read. Upright is the assumption every image without the tag is
// displayed under anyway.
0f
}
app/androidApp/src/main/kotlin/com/example/aiapp/Bubble.kt
+8 -11
View File
@@ -8,18 +8,16 @@ import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Shape
import androidx.compose.ui.unit.dp
// The composer's row of settings and pickers, and the menus they open. One file because the
// outline and the corner are one appearance: a control shaped like this opens a surface shaped
// like this, and a reader learns the pair once.
// The composer's row of settings and pickers, and the menus they open. One file because the outline
// and the corner are one appearance: a control shaped like this opens a surface shaped like this.
/**
* A bordered pill: a control that can be seen without being pressed.
*
* The composer's row -- attach, model, permission mode -- was text buttons, which draw nothing at
* all until they are touched. Three bare words sitting under the message field read as a caption
* about the field rather than as three things to press, and the only way to find out otherwise was
* to press one. The outline says "control" without the weight of a filled button, which is reserved
* here for the two that act on the session (send, and start/stop).
* all until they are touched. Three bare words under the message field read as a caption about the
* field rather than as three things to press. The outline says "control" without the weight of a
* filled button, which is reserved for the two that act on the session.
*/
@Composable
fun BubbleButton(
@@ -32,8 +30,8 @@ fun BubbleButton(
onClick = onClick,
enabled = enabled,
shape = BubbleShape,
// A text button's padding rather than a filled button's 24dp: these sit three across
// under the message field, and the wider padding is what decides whether the row fits.
// A text button's padding rather than a filled button's 24dp: these sit three across under
// the message field, and the wider padding is what decides whether the row fits.
contentPadding = ButtonDefaults.TextButtonContentPadding,
modifier = modifier,
) {
@@ -48,7 +46,6 @@ val BubbleShape: Shape = RoundedCornerShape(percent = 50)
* The corner on a menu one of these opens.
*
* A radius rather than [BubbleShape]'s half-height: a menu is as tall as its options, and rounding
* ends that tall would bow its sides. This is the roundest corner that still leaves a straight edge
* beside a one-line option, which is the shortest menu here.
* ends that tall would bow its sides.
*/
val BubbleMenuShape: Shape = RoundedCornerShape(20.dp)
app/androidApp/src/main/kotlin/com/example/aiapp/BusyItem.kt
+11 -17
View File
@@ -26,20 +26,16 @@ import androidx.compose.ui.unit.dp
* of the operation over it.
*
* One composable rather than a pattern each list repeats, because "this row is busy" has to look
* the same in the import list and the session list or the appearance becomes a per-screen dialect
* rather than something the reader learns once.
* the same in the import list and the session list or the appearance becomes a per-screen dialect.
*
* [label] names the operation and `null` means none is running. One parameter rather than a boolean
* beside a string, which can disagree: there is no such thing as busy with nothing happening. It is
* a *word* because a spinner alone cannot say which operation this is — deleting and importing are
* different in kind, and losing a session to the wrong one is not recoverable by waiting.
* beside a string, which can disagree. It is a *word* because a spinner alone cannot say which
* operation this is -- deleting and importing are different in kind.
*
* It does **not** make the row inert; the caller disables its own click handling while it passes a
* label. That was the other way round at first — an overlay consuming pointer events, so no caller
* had to remember — and it swallowed the drag along with the tap, which meant a list could not be
* scrolled while anything in it was busy. Consuming taps but not drags means re-deciding what a
* gesture is above the components that already decide it; disabling the click is the platform's own
* answer and leaves the scroll where it belongs.
* label. That was the other way round at first -- an overlay consuming pointer events -- and it
* swallowed the drag along with the tap, so a list could not be scrolled while anything in it was
* busy.
*/
@Composable
fun BusyItem(label: String?, content: @Composable () -> Unit) {
@@ -71,14 +67,12 @@ fun BusyItem(label: String?, content: @Composable () -> Unit) {
/**
* How an item looks while it is being acted on: darker, and nearly grey.
*
* Both, rather than either alone. Dimming by itself is what this app already used for a row on its
* way out, and it is the same cue as a disabled control, so a busy row read as one more thing that
* could not be tapped. Draining the colour is what says the row is *suspended* — the status word,
* the accent on a warning and everything else that means something by its colour stop meaning it
* for as long as the operation runs, which is exactly true: none of them is being kept up to date.
* Both, rather than either alone. Dimming by itself is the same cue as a disabled control, so a
* busy row read as one more thing that could not be tapped. Draining the colour is what says the
* row is *suspended* -- the status word and everything else that means something by its colour stop
* meaning it for as long as the operation runs, which is exactly true.
*
* Not all the way to grey. A row with no colour left is hard to find again in a list, and the
* reader is watching this one.
* Not all the way to grey: a row with no colour left is hard to find again in a list.
*/
private fun Modifier.busy(busy: Boolean): Modifier =
if (!busy) this
app/androidApp/src/main/kotlin/com/example/aiapp/Chevron.kt
+3 -6
View File
@@ -27,13 +27,10 @@ enum class Pointing {
*
* One composable for all four directions rather than one per axis that differ by which coordinate
* gets the minus sign -- the copies would drift, and the drift would be a bug in exactly one
* direction. The shape is written once in its own coordinates, where x runs across the opening and
* y runs from the open side to the tip, and [Pointing] is only a table of how those two map onto
* the box.
* direction. The shape is written once in its own coordinates, and [Pointing] is only a table of
* how those map onto the box.
*
* It draws no label of its own, so every caller owes it a `contentDescription`: this is the whole
* of what assistive technology has to go on, and it is also the answer to "what was that arrow for"
* six months from now.
* It draws no label of its own, so every caller owes it a `contentDescription`.
*/
@Composable
fun Chevron(
app/androidApp/src/main/kotlin/com/example/aiapp/CodeFence.kt
+18 -27
View File
@@ -30,14 +30,12 @@ import org.intellij.markdown.ast.getTextInNode
* sits on, scrolling sideways rather than wrapping.
*
* The renderer's own fence drew the same block in plain text. The scanner that colours a tool
* call's command colours a reply's code the same way, through [highlighted] and one palette, so a
* `kotlin` fence and the Kotlin a tool wrote are the same colours. A fence in a language [scan] has
* no rules for is plain rather than wrongly coloured: [fenceLanguage] answers null for those, and
* plain is what the reader would have seen before.
* call's command colours a reply's code the same way, so a `kotlin` fence and the Kotlin a tool
* wrote are the same colours. A fence in a language [scan] has no rules for is plain rather than
* wrongly coloured.
*
* Finding the code is still the library's: which children of the node are the fence markers, the
* language word and the code between them is its knowledge of the parser, and [MarkdownCodeFence]
* hands out the code and the language and leaves the drawing to the block it is given.
* language word and the code between them is its knowledge of the parser.
*/
@Composable
fun CodeFence(
@@ -67,14 +65,12 @@ fun CodeBlock(
/**
* The code inside a fence or indented block, and the highlighter's language for its info word.
*
* Which children of the node are the fence markers, the language word and the code between them is
* the library's knowledge of the parser, copied from its `MarkdownCodeFence` rather than called:
* that one is a composable, and the whole point of this function is that [warm] can run it on a
* background thread and highlight the same string the drawing will ask for. Two extractions would
* be two keys, and the warmed answer would be silently missed at every fence.
* Copied from the library's `MarkdownCodeFence` rather than called: that one is a composable, and
* the whole point here is that [warm] can run this on a background thread and highlight the same
* string the drawing will ask for. Two extractions would be two keys, and the warmed answer would
* be silently missed at every fence.
*
* Null for a fence too short to hold anything -- an unterminated one still arriving, which the
* library skips as invalid.
* Null for a fence too short to hold anything -- an unterminated one still arriving.
*/
fun fenceContent(content: String, node: ASTNode): Pair<String, Language?>? {
val word =
@@ -97,7 +93,6 @@ fun fenceContent(content: String, node: ASTNode): Pair<String, Language?>? {
*
* The renderer's own block, less what nothing here needs: the same background, corner, padding and
* sideways scroll, without the shadow, the border and the empty pointer handler it also carried.
* The vertical margin is the renderer's too, kept so a reply's fences sit where they always have.
*/
@Composable
private fun CodeBlockText(
@@ -117,8 +112,7 @@ private fun CodeBlockText(
.semantics { isTraversalGroup = true }
) {
BasicText(
// No language while the block is still being written, which is what draws it plain;
// see [MarkdownRoot]'s `streaming`.
// No language while the block is still being written, which is what draws it plain.
replies.highlighted(code, language.takeUnless { streaming }),
style = style,
modifier = Modifier.horizontalScroll(rememberScrollState()).padding(padding.codeBlock),
@@ -141,14 +135,12 @@ fun fenceLanguage(name: String?): Language? =
* The highlighter's language for a *file*, from its name.
*
* The same table [fenceLanguage] reads, deliberately: it already keys on the extensions people
* write after the backticks -- `kt`, `rs`, `py` -- because the extension is as often what gets
* written there as the language's name. One table rather than two, so a language added for fences
* is a language added for files and neither can be the one somebody forgot.
* write after the backticks. One table rather than two, so a language added for fences is a
* language added for files and neither can be the one somebody forgot.
*
* The extension is the part after the *last* dot, which is what makes `build.gradle.kts` Kotlin and
* `Cargo.toml` TOML. A leading dot is not one: `.bashrc` has no extension, it has a name that
* starts with a dot, and reading `bashrc` as an extension would look up a word no table has. A name
* with no dot at all -- `Makefile`, `LICENSE` -- is likewise null, and null is drawn plain.
* The extension is the part after the *last* dot, which is what makes `build.gradle.kts` Kotlin. A
* leading dot is not one: `.bashrc` has no extension, it has a name that starts with a dot. A name
* with no dot at all -- `Makefile` -- is likewise null, and null is drawn plain.
*/
fun fileLanguage(name: String): Language? {
val dot = name.lastIndexOf('.')
@@ -206,10 +198,9 @@ private val FENCE_LANGUAGES: Map<String, Language> =
)
/**
* Every fence in [parse], as the code and language [highlight] will be asked for.
*
* Walks the whole tree rather than the top level: a fence inside a list item or a quote is drawn
* the same way and costs the same to lex.
* Every fence in [parse], as the code and language [highlight] will be asked for. Walks the whole
* tree rather than the top level: a fence inside a list item or a quote is drawn the same way and
* costs the same to lex.
*/
fun fences(parse: State): List<Pair<String, Language?>> {
val success = parse as? State.Success ?: return emptyList()
app/androidApp/src/main/kotlin/com/example/aiapp/Commands.kt
+6 -8
View File
@@ -25,8 +25,7 @@ import androidx.compose.ui.unit.dp
* These are the two this app understands, and understanding them is what lets it show them: a
* suggestion while one is being typed, a name in the settings screen that sends one, and a bubble
* that stays up while the session is too busy to run it. Anything else beginning with "/" is passed
* through to whatever runs the session, because a dialect's own vocabulary is its own and grows
* without this list -- it just arrives unannounced and unexplained.
* through, because a dialect's own vocabulary grows without this list.
*/
data class SessionCommand(
/** With the slash, as it is typed and as it is sent. */
@@ -90,8 +89,8 @@ fun CommandSuggestions(
verticalAlignment = Alignment.CenterVertically,
) {
Text(
// The command in the colour commands are, so the suggestion and the
// bubble it becomes are visibly the same thing.
// The command in the colour commands are, so the suggestion and the bubble
// it becomes are visibly the same thing.
if (command.argument == null) command.name
else "${command.name} <${command.argument}>",
style = MaterialTheme.typography.titleSmall,
@@ -117,8 +116,7 @@ fun CommandSuggestions(
* anything appearing here.
*
* [waiting] is a command the session is too busy to run yet, which is a state with a spinner and a
* reason: pressing Compact in the middle of a long turn otherwise does nothing visible for minutes
* and reads as having been missed.
* reason: pressing Compact in the middle of a long turn otherwise does nothing visible for minutes.
*/
@Composable
fun CommandBubble(text: String, waiting: Boolean = false) {
@@ -128,8 +126,8 @@ fun CommandBubble(text: String, waiting: Boolean = false) {
modifier = Modifier.align(Alignment.CenterEnd).padding(start = 48.dp),
) {
Column(Modifier.padding(12.dp)) {
// Stated beside the fill rather than inherited: a semantic colour has to carry
// its own contrast, because the surface under it will not change to rescue it.
// Stated beside the fill rather than inherited: a semantic colour has to carry its
// own contrast, because the surface under it will not change to rescue it.
Text(text, color = MaterialTheme.colorScheme.inverseOnSurface)
if (waiting) {
Spacer(Modifier.height(6.dp))
app/androidApp/src/main/kotlin/com/example/aiapp/Compaction.kt
+11 -17
View File
@@ -7,12 +7,10 @@ import androidx.compose.ui.Modifier
* The mark a compaction leaves in the transcript.
*
* A divider rather than something anybody said: everything above it is out of the session's context
* now, and that is a fact about the conversation, not a turn in it. It has no collapsed form -- it
* is already one line, and there is nothing behind it to open. Drawn by [TranscriptDivider], which
* a clear also uses, so the two marks cannot drift apart.
* now, and that is a fact about the conversation, not a turn in it. Drawn by [TranscriptDivider],
* which a clear also uses, so the two marks cannot drift apart.
*
* Blue is [commandColor]: the session acting on itself rather than working on what was asked of it,
* which is the same thing the status line says while the compaction runs.
* Blue is [commandColor]: the session acting on itself rather than working on what was asked of it.
*/
@Composable
fun CompactedRow(item: TranscriptItem.CompactedNote, modifier: Modifier = Modifier) {
@@ -23,9 +21,8 @@ fun CompactedRow(item: TranscriptItem.CompactedNote, modifier: Modifier = Modifi
* What to say about a compaction: the two sizes, and nothing else.
*
* The counts are the whole point -- "a million tokens became ten thousand" is the reader's answer
* to why the wait was worth it -- and they are all this says, because a divider is read in passing.
* When they were not reported this says only that a compaction happened, rather than filling in a
* plausible number or explaining at length what was missing.
* to why the wait was worth it. When they were not reported this says only that a compaction
* happened, rather than filling in a plausible number.
*/
fun compactionSummary(item: TranscriptItem.CompactedNote): String {
val pre = item.preTokens
@@ -41,8 +38,8 @@ fun compactionSummary(item: TranscriptItem.CompactedNote): String {
* A token count as a reader reads one.
*
* Shared with the status row rather than formatted at each: the divider and the row report the same
* quantity about the same moment, and one of them grouping its thousands while the other did not
* read as two different measurements.
* quantity about the same moment, and one grouping its thousands while the other did not read as
* two different measurements.
*/
fun tokens(count: Long): String = "%,d".format(count)
@@ -50,15 +47,12 @@ fun tokens(count: Long): String = "%,d".format(count)
* What the working indicator says while a compaction is running.
*
* Elapsed time and nothing else, because elapsed time is all there is: the CLI announces that a
* compaction has begun and then says nothing until it has finished, so any bar, percentage or
* estimate here would be this screen's guess wearing a measurement's clothes. Knowing it has been
* going forty seconds is what a reader actually wants -- it is the difference between waiting and
* going to look at why.
* compaction has begun and then says nothing until it has finished, so any bar or estimate here
* would be this screen's guess wearing a measurement's clothes.
*
* [seconds] is null when this device did not see the compaction start, which is what opening a
* session that is already compacting looks like. That case says only "compacting": no number is the
* honest answer, and a number counted from the moment the screen opened would be wrong in the
* direction that matters, since a compaction somebody is asking about is a long one.
* session that is already compacting looks like. That case says only "compacting": a number counted
* from the moment the screen opened would be wrong in the direction that matters.
*/
fun compactingLabel(seconds: Long?): String =
when {
app/androidApp/src/main/kotlin/com/example/aiapp/CrashLog.kt
+5 -8
View File
@@ -12,10 +12,9 @@ import java.util.Locale
* The last crash, kept so the debug button can hand it over.
*
* The alternative is asking somebody to reproduce a crash with the phone plugged into a computer
* and `logcat` running, which is the one thing nobody has set up at the moment it happens -- and a
* crash report that arrives a day later, without the stack, is a guess. This costs one file write
* on a process that is already dying, and it turns "it crashes when I open that chat" into the
* frame it crashed in.
* and `logcat` running, which is the one thing nobody has set up at the moment it happens. This
* costs one file write on a process that is already dying, and it turns "it crashes when I open
* that chat" into the frame it crashed in.
*
* Kept until it is read rather than cleared on the next launch: the app restarts before anybody can
* ask about it, so a log that lives for one session is a log that is never read.
@@ -26,8 +25,7 @@ private const val CRASH_FILE = "last-crash.txt"
* How much of a stack is kept.
*
* This is pasted into a conversation, so it has a budget like any other output written for a
* reader. The top of a stack is what identifies a crash and the bottom is framework plumbing, so
* what gets cut is the part nobody reads.
* reader. The top of a stack is what identifies a crash and the bottom is framework plumbing.
*/
private const val CRASH_LIMIT = 4000
@@ -35,8 +33,7 @@ private const val CRASH_LIMIT = 4000
* Records uncaught exceptions, then lets the platform do what it was going to do.
*
* Chained rather than replacing: the default handler is what shows the "app has stopped" dialog and
* ends the process, and an app that swallows that instead sits there in an unknown state. This only
* adds a witness.
* ends the process, and an app that swallows that instead sits there in an unknown state.
*/
fun installCrashLog(context: Context) {
val app = context.applicationContext
app/androidApp/src/main/kotlin/com/example/aiapp/DebugStats.kt
+8 -12
View File
@@ -12,10 +12,9 @@ import java.util.concurrent.atomic.AtomicLong
*
* Here because the emulator cannot answer the question this is for. Its own scroll sits at the same
* frame times as the stock Settings app -- 21ms at the median for both -- so every app-level cost
* is under the floor of what it can measure, and a frame number taken in it says nothing about a
* 120Hz phone. Counts do not have that problem: how many times a row was composed, or a reply
* parsed, is the same number on any machine, and it is the number that says whether the work is
* proportional to what is on screen or to everything ever loaded.
* is under the floor of what it can measure. Counts do not have that problem: how many times a row
* was composed, or a reply parsed, is the same number on any machine, and it is the number that
* says whether the work is proportional to what is on screen or to everything ever loaded.
*
* Always on rather than behind a build flag. What is measured is an atomic increment on paths that
* already allocate lists and parse markdown, and a counter that is only compiled into the build
@@ -90,14 +89,12 @@ object DebugStats {
*
* The draw phase is where Compose's measurement lands as well as its recording -- the platform
* calls `measureAndLayout()` from `dispatchDraw` -- so "draw is high" has never said which of three
* different things is high. The transcript times its own measure, its own placement and its own
* recording, and this is the subtraction that was otherwise done by hand in a conversation every
* time a report arrived. What is left over is the framework's per-frame bookkeeping after a layout,
* which grows with how many nodes are alive rather than with how many are on screen.
* different things is high. The transcript times its own measure, placement and recording, and this
* is the subtraction. What is left over is the framework's per-frame bookkeeping after a layout,
* which grows with how many nodes are alive rather than how many are on screen.
*
* Per frame rather than in total, because the budget it has to fit in is per frame. The recordings
* are not themselves per-frame -- a measurement happens on the frames that need one -- so these are
* shares of an average frame, not a claim about any particular one.
* are not themselves per-frame, so these are shares of an average frame.
*/
fun drawAccounting(drawNanos: Long, frames: Int): List<String> {
if (frames == 0 || drawNanos == 0L) return emptyList()
@@ -122,8 +119,7 @@ fun drawAccounting(drawNanos: Long, frames: Int): List<String> {
* frames went, and what the app did to produce them.
*
* Written for somebody to paste into a conversation, so it is plain text with the units on every
* number -- a report whose reader has to ask what the columns mean costs another round trip, and
* the whole point of it is to save one.
* number -- a report whose reader has to ask what the columns mean costs another round trip.
*/
fun debugReport(
device: String,
app/androidApp/src/main/kotlin/com/example/aiapp/Dividers.kt
+3 -8
View File
@@ -21,11 +21,7 @@ import androidx.compose.ui.unit.dp
* reader scrolling back, both mean "the session no longer has what is above this", and which of the
* two it was is said by the words and the colour.
*
* The rules take [color] too, so the whole divider reads as one mark of one kind rather than a
* coloured phrase sitting in an unrelated grey line.
*
* Written once here rather than styled at each of them, so the two cannot drift into looking like
* different kinds of thing.
* The rules take [color] too, so the whole divider reads as one mark of one kind.
*/
@Composable
fun TranscriptDivider(text: String, color: Color, modifier: Modifier = Modifier) {
@@ -44,9 +40,8 @@ fun TranscriptDivider(text: String, color: Color, modifier: Modifier = Modifier)
* The mark a clear leaves.
*
* Red, and no counts: a clear takes the conversation out of what the session is given, and unlike a
* compaction it summarises nothing and measures nothing, so there is nothing to report but the
* fact. Everything above stays on screen and stays scrollable -- the reader can see that, which is
* why this does not say it.
* compaction it summarises nothing and measures nothing. Everything above stays on screen and stays
* scrollable -- the reader can see that, which is why this does not say it.
*/
@Composable
fun ClearedRow(modifier: Modifier = Modifier) {
app/androidApp/src/main/kotlin/com/example/aiapp/Drafts.kt
+7 -10
View File
@@ -10,12 +10,11 @@ private const val DRAFTS = "session-drafts"
*
* On this device rather than on the backend, which is where this app otherwise keeps state so that
* every device sees it. A draft is the case that rule is not about: it is the contents of a text
* box on the phone somebody is holding, written on every keystroke, and half a sentence surfacing
* on another device would be a surprise rather than a convenience. What has been *sent* is the
* server's, and that is the part which has to outlive this phone.
* box on the phone somebody is holding, and half a sentence surfacing on another device would be a
* surprise. What has been *sent* is the server's.
*
* Kept per session id, because the thing being typed belongs to the conversation it is aimed at:
* one shared box would hand a message meant for one session to whichever was opened next.
* Kept per session id: one shared box would hand a message meant for one session to whichever was
* opened next.
*/
fun loadDraft(context: Context, sessionId: String): String =
context.getSharedPreferences(DRAFTS, Context.MODE_PRIVATE).getString(sessionId, "").orEmpty()
@@ -23,11 +22,9 @@ fun loadDraft(context: Context, sessionId: String): String =
/**
* Records [text] as the draft for [sessionId], or forgets it when there is nothing left to keep.
*
* The path out is emptying the box, which is what sending does -- so a sent message removes its own
* entry and nothing accumulates for a session in ordinary use. A session *deleted* while it held a
* draft does leave its key behind: pruning those means a pass over the live session list, which
* this file would otherwise have no reason to know about, and the residue is a few bytes per
* session ever abandoned mid-sentence. That is a trade rather than an oversight.
* The path out is emptying the box, which is what sending does. A session *deleted* while it held a
* draft does leave its key behind: pruning those means a pass over the live session list, and the
* residue is a few bytes per session ever abandoned mid-sentence.
*/
fun saveDraft(context: Context, sessionId: String, text: String) {
context.getSharedPreferences(DRAFTS, Context.MODE_PRIVATE).edit {
app/androidApp/src/main/kotlin/com/example/aiapp/Durations.kt
+4 -5
View File
@@ -5,13 +5,12 @@ package com.example.aiapp
*
* A tool's timeout arrives as `480000`, which nobody reads as eight minutes. The rule has two
* halves, because a short span and a long one are read for different things. Under a minute the
* question is "roughly how long", so only the largest unit is shown and a fraction of it carries
* the rest -- `2.5s`, `30ms`. At a minute or more the question is "how long exactly", so every unit
* that has something in it is written out -- `5d 12h 4m`. Units that are empty are left out rather
* than written as zero, since the labels say which is which and `5d 0h 4m` is only longer.
* question is "roughly how long", so only the largest unit is shown and a fraction carries the rest
* -- `2.5s`. At a minute or more the question is "how long exactly", so every unit with something
* in it is written out -- `5d 12h 4m`. Empty units are left out rather than written as zero.
*
* Sub-second precision is dropped past a minute: nothing that takes days is measured in
* milliseconds, and carrying them would make the common case the widest one.
* milliseconds.
*/
fun formatMillis(ms: Long): String {
if (ms < 0) return "-" + formatMillis(-ms)
app/androidApp/src/main/kotlin/com/example/aiapp/EventStream.kt
+13 -7
View File
@@ -12,7 +12,7 @@ private const val RESET_EVENT = "reset"
*
* The connection and its framing belong to [Sse]; what stays here is what this stream's frames
* mean. [close] from any thread ends it, and the caller owns reconnecting -- with the last seq it
* saw as the new cursor. See SessionScreen.
* saw as the new cursor.
*/
class EventStream(settings: ServerSettings, private val sessionId: String) {
private val stream = Sse(settings)
@@ -24,15 +24,21 @@ class EventStream(settings: ServerSettings, private val sessionId: String) {
*
* [onReset] fires when the server answers that the cursor is too far behind to continue from:
* everything already displayed is stale and the events that follow are a fresh window, so the
* caller drops what it holds and rebuilds -- the same thing it does when the screen opens. It
* arrives before those events, so a caller that clears on it stays in order.
* caller drops what it holds and rebuilds. It arrives before those events, so a caller that
* clears on it stays in order.
*/
fun run(after: Long, onOpen: () -> Unit, onReset: () -> Unit, onEvent: (SeqEvent) -> Unit) {
fun run(
after: Long,
onOpen: () -> Unit,
onReset: () -> Unit,
// The frame's own text as well as the event parsed from it: the transcript cache stores the
// one and the screen folds the other, and they have to be the same line.
onEvent: (raw: String, event: SeqEvent) -> Unit,
) {
stream.run("/sessions/$sessionId/events?after=$after", onOpen) { name, data ->
// A named frame carries no payload and a data frame has no name, so this is one or
// the other.
// A named frame carries no payload and a data frame has no name.
if (name == RESET_EVENT) onReset()
else if (data.isNotEmpty()) onEvent(parseSeqEvent(data))
else if (data.isNotEmpty()) onEvent(data, parseSeqEvent(data))
}
}
}
app/androidApp/src/main/kotlin/com/example/aiapp/Events.kt
+43 -61
View File
@@ -2,10 +2,9 @@ package com.example.aiapp
import org.json.JSONObject
// The common event model, mirrored from server/src/session/driver.rs --
// the app renders purely from this stream (replayed from the transcript by
// cursor, then live), so there is no separate "load history" shape to keep
// in sync with it.
// The common event model, mirrored from server/src/session/driver.rs -- the app renders purely from
// this stream (replayed from the transcript by cursor, then live), so there is no separate "load
// history" shape to keep in sync with it.
/** One transcript line: the event plus its resume cursor and time. */
data class SeqEvent(val seq: Long, val ts: Double, val event: SessionEvent)
@@ -13,8 +12,7 @@ data class SeqEvent(val seq: Long, val ts: Double, val event: SessionEvent)
/**
* One choice offered in answer to a question.
*
* More than a label because the reader is deciding rather than confirming: what an option means,
* and what picking it would produce, are the things that decide it. Both are absent on a
* More than a label because the reader is deciding rather than confirming. Both are absent on a
* permission, whose Allow and Deny mean exactly what they say.
*/
data class QuestionOption(val label: String, val description: String?, val preview: String?)
@@ -30,13 +28,12 @@ sealed class SessionEvent {
*/
val id: String?,
/**
* What was attached to it, by the ref the files route serves: images, and since 2026-09-03
* any file, told apart by [isImageRef].
* What was attached to it, by the ref the files route serves: images, and any file, told
* apart by [isImageRef].
*
* On the message rather than beside it: these arrived as separate image events until
* 2026-08-30, which drew somebody's screenshot as a row floating above the bubble that sent
* it, and left this app deciding from adjacency alone which message an image went with --
* something the sender knew and could simply have said.
* it, and left this app deciding from adjacency which message an image went with.
*/
val attachments: List<String>,
) : SessionEvent()
@@ -45,11 +42,10 @@ sealed class SessionEvent {
* A message the server has accepted and the session has not read yet.
*
* From the server, not from this app's memory of what it sent. The pending bubble used to be
* screen state, so leaving the session or restarting the app drew nothing waiting while the
* message was still queued -- and nothing waiting is what "there is nothing" looks like.
* screen state, so leaving the session drew nothing waiting while the message was still queued
* -- and nothing waiting is what "there is nothing" looks like.
*
* Resolved by the [UserMessage] carrying the same id, exactly as [CommandQueued] is resolved by
* [CommandSent].
* Resolved by the [UserMessage] carrying the same id.
*/
data class MessageQueued(val id: String, val text: String, val attachments: List<String>) :
SessionEvent()
@@ -59,8 +55,7 @@ sealed class SessionEvent {
*
* Recorded by the server for the same reason [MessageQueued] is: a phone that reconnects
* replays both, and without this one it would put back a bubble for a message that is never
* coming -- with nothing left to resolve it, since the [UserMessage] that normally does is
* exactly what was cancelled.
* coming.
*/
data class MessageDropped(val id: String) : SessionEvent()
@@ -108,17 +103,14 @@ sealed class SessionEvent {
*
* The live Claude Code path only learns a turn was somebody else's when the turn ends, so
* the event arrives below everything it caused; this is what puts it back above it. Null
* for a message read out of a session file, which is already in the right place, and for
* one that started no turn. See the server's `Event::PeerMessage`.
* for a message read out of a session file, and for one that started no turn.
*/
val turnStart: Long? = null,
) : SessionEvent()
/**
* A command the session was asked to run on itself and cannot run yet.
*
* Resolved by [CommandSent] with the same id. A command that ran straight away has only that
* one, so nothing here ever draws a bubble that resolves in the same frame.
* A command the session was asked to run on itself and cannot run yet. Resolved by
* [CommandSent] with the same id; a command that ran straight away has only that one.
*/
data class CommandQueued(val id: String, val text: String) : SessionEvent()
@@ -130,29 +122,26 @@ sealed class SessionEvent {
/**
* What the session is set to, as the session itself reports it.
*
* Either field alone: the two are confirmed separately and by different things. Asking for a
* change is not having one, so this -- not the request -- is what the pickers show.
* Either field alone: the two are confirmed separately. Asking for a change is not having one,
* so this -- not the request -- is what the pickers show.
*/
data class Settings(val model: String?, val permissionMode: String?) : SessionEvent()
/**
* What a turn cost, and how much the model was holding when it ended.
*
* [context] is prompt plus both cache figures, measured by the backend from the turn's own
* usage. Carried on the event rather than summed by the reader, because it is not a sum: a
* conversation's context drops at a compaction and a clear, so adding turns up would report a
* figure the session stopped being true of. Null where the dialect did not say, and on entries
* recorded before the backend sent it -- which leaves the context unmeasured rather than
* unchanged.
* [context] is prompt plus both cache figures. Carried on the event rather than summed by the
* reader, because it is not a sum: a conversation's context drops at a compaction and a clear,
* so adding turns up would report a figure the session stopped being true of. Null where the
* dialect did not say, which leaves the context unmeasured rather than unchanged.
*/
data class UsageDelta(val tokens: Long, val context: Long?) : SessionEvent()
/**
* A compaction that finished, and how much context it recovered.
*
* The counts are nullable because the server sends them only when it was told them: a
* compaction whose size nobody measured has to be able to say so, since a zero here would read
* as "recovered nothing" and a made-up number would read as a measurement.
* The counts are nullable because the server sends them only when it was told them: a zero here
* would read as "recovered nothing" and a made-up number would read as a measurement.
*/
data class Compacted(
val preTokens: Long?,
@@ -163,9 +152,7 @@ sealed class SessionEvent {
/**
* The conversation was cleared. Everything above this is still here to read and is no longer in
* the session's context.
*
* An object rather than a class because it carries nothing: what it means is entirely its
* the session's context. An object rather than a class because what it means is entirely its
* position in the transcript.
*/
data object Cleared : SessionEvent()
@@ -173,17 +160,15 @@ sealed class SessionEvent {
data class Error(val message: String) : SessionEvent()
/**
* An event type this app build doesn't know -- a newer server. Kept (not thrown) so one new
* event kind degrades to a placeholder row instead of killing the stream.
* An event type this app build doesn't know -- a newer server. Kept rather than thrown so one
* new event kind degrades to a placeholder row instead of killing the stream.
*/
data class Unknown(val type: String) : SessionEvent()
}
/**
* A JSON array of strings under [name], empty when the field is absent.
*
* Absent is the ordinary case -- most messages carry no attachment, and the server omits the field
* rather than sending an empty list -- so this is the shape every caller wants.
* A JSON array of strings under [name], empty when the field is absent -- the ordinary case, since
* the server omits the field rather than sending an empty list.
*/
private fun JSONObject.stringList(name: String): List<String> {
val array = optJSONArray(name) ?: return emptyList()
@@ -212,8 +197,8 @@ fun parseSeqEvent(json: String): SeqEvent {
SessionEvent.ToolStart(
id = body.getString("id"),
tool = body.getString("tool"),
// Kept as raw JSON text: the input shape is the tool's own
// business, and the UI only ever shows it verbatim.
// Kept as raw JSON text: the input shape is the tool's own business, and the UI
// only ever shows it verbatim.
input = body.get("input").toString(),
)
"toolUpdate" -> SessionEvent.ToolUpdate(body.getString("id"), body.getString("output"))
@@ -282,36 +267,33 @@ fun parseSeqEvent(json: String): SeqEvent {
return SeqEvent(seq = body.getLong("seq"), ts = body.getDouble("ts"), event = event)
}
/**
* Whether [state] is one the session is doing work in -- the states a turn is still open under.
*
* One predicate because two readers have to agree on the list: the session screen's working
* indicator, and the fold's decision that the newest reply is finished. Two copies would drift the
* first time the server grows a state, and the drift would be a reply that never splits or one
* split mid-stream.
*/
fun sessionWorking(state: String): Boolean = state == "running" || state == "compacting"
/**
* The context after [event], given what it was before.
*
* The same rule the server folds with, because the screen has to keep up between page loads: the
* summary it opened with is a measurement from before this stream started, and every event that
* moves the figure arrives here.
* summary it opened with is a measurement from before this stream started.
*
* The two that lower it are the point. A clear takes the conversation away and a compaction
* replaces it with a summary, so a figure measured before either stopped being true at that moment
* -- and carrying it forward is how a session that had just been cleared went on reporting the
* context it no longer had.
*
* Null is "we don't know", which is a state each of them can reach: nothing measured yet, a
* compaction that finished without saying how much it recovered, or a clear nobody has run a turn
* since.
* Null is "we don't know", which each of them can reach.
*/
/**
* Whether [state] is one the session is doing work in -- the states a turn is still open under.
*
* One predicate because two readers have to agree on the list: the session screen's working
* indicator, and the fold's decision that the newest reply is finished
* ([TranscriptItem.AssistantMsg.settled]). Two copies would drift the first time the server grows a
* state, and the drift would be a reply that never splits or one split mid-stream.
*/
fun sessionWorking(state: String): Boolean = state == "running" || state == "compacting"
fun contextAfter(current: Long?, event: SessionEvent): Long? =
when (event) {
// Falls back to what we had, so a turn the dialect reported no usage for is stale by a
// turn -- which every context figure is -- rather than unknown.
// Falls back to what we had, so a turn the dialect reported no usage for is stale by a turn
// -- which every context figure is -- rather than unknown.
is SessionEvent.UsageDelta -> event.context ?: current
is SessionEvent.Compacted -> event.postTokens
is SessionEvent.Cleared -> null
app/androidApp/src/main/kotlin/com/example/aiapp/FileEditor.kt
+13 -18
View File
@@ -26,7 +26,7 @@ import androidx.compose.ui.text.style.TextAlign
/**
* The largest file this app will open in the editor, in bytes.
*
* Measured on the emulator on 2026-09-04, in a debug build, on generated Rust:
* Measured on the emulator 2026-09-04, in a debug build, on generated Rust:
*
* | file | lines | scan per keystroke | worst frame record | typing |
* |--------|--------|--------------------|--------------------|-------------------|
@@ -35,15 +35,13 @@ import androidx.compose.ui.text.style.TextAlign
* | 1 MB | 28,660 | -- | -- | stops responding |
*
* The number that decides this is the **frame record**, not the scan: highlighting a 128 kB file
* costs 40ms a keystroke, which is noticeable and survivable, while laying the same text out in one
* `BasicTextField` costs two seconds. So switching highlighting off above a size -- which is what
* EXPLORER.md expected to have to decide -- would not have saved it; the cost is Compose laying out
* one enormous text, and every arrangement of a single text field pays it. A line-by-line editor is
* the way past this and is a good deal more than this feature needed.
* costs 40ms a keystroke, which is survivable, while laying the same text out in one
* `BasicTextField` costs two seconds. So switching highlighting off above a size -- what
* EXPLORER.md expected to have to decide -- would not have saved it; every arrangement of a single
* text field pays that cost. A line-by-line editor is the way past this.
*
* 32 kB rather than something between it and 128 kB, because 32 kB is the largest size that was
* actually measured as usable. The viewer's own limit stays the server's `FILE_LIMIT` of 1 MiB:
* reading a big file is fine, and it is only editing one that is not.
* 32 kB because it is the largest size actually measured as usable. The viewer's own limit stays
* the server's `FILE_LIMIT` of 1 MiB: reading a big file is fine, and only editing one is not.
*/
const val EDIT_LIMIT = 32L * 1024
@@ -53,18 +51,15 @@ const val EDIT_LIMIT = 32L * 1024
* `BasicTextField(TextFieldValue)` with a [VisualTransformation] is the one Compose arrangement
* that colours a field's own text rather than replacing the field with something that only looks
* like one: the transformation returns the text unchanged and the scanner's spans as styles, so
* [OffsetMapping.Identity] is correct by construction -- no character moves, so no offset does. The
* newer `TextFieldState` API has no hook for styles at all, which is why this is the older one.
* [OffsetMapping.Identity] is correct by construction. The newer `TextFieldState` API has no hook
* for styles at all.
*
* The cost is that the whole file is re-scanned on every keystroke. For a file under the server's
* limit that is expected to be a few milliseconds; see EXPLORER.md's "Numbers to measure", which is
* where a size below which highlighting is switched off would be decided if it turns out to be
* needed.
* The cost is that the whole file is re-scanned on every keystroke, which is what [EDIT_LIMIT] is
* sized against.
*
* The gutter is one `Text` of `1\n2\n…` beside the field rather than a number per row, because
* there are no rows here -- the field is one text object. It stays put while the text scrolls
* sideways, and it lines up for the same reason the viewer's does: nothing wraps, so a logical line
* is a visual line.
* there are no rows here -- the field is one text object. It lines up for the same reason the
* viewer's does: nothing wraps, so a logical line is a visual line.
*/
@Composable
fun FileEditor(
app/androidApp/src/main/kotlin/com/example/aiapp/FileLines.kt
+16 -25
View File
@@ -12,10 +12,8 @@ import androidx.compose.ui.text.buildAnnotatedString
* and again on every recomposition.
*
* Why per line at all: the viewer is a `LazyColumn` of lines rather than one `Text`, because text
* layout is linear in the text and a twenty-thousand-line file in one `Text` measures all of it to
* draw a screenful. That means each row needs *its* colours, and the scanner answers in offsets
* into the whole file -- so the spans are bucketed here, once, in one pass over an already-ordered
* list, rather than each row searching the whole list for the part that is its.
* layout is linear in the text. That means each row needs *its* colours, and the scanner answers in
* offsets into the whole file -- so the spans are bucketed here, once, in one pass.
*/
class FileLines
private constructor(
@@ -37,11 +35,9 @@ private constructor(
get() = lines.size
/**
* One line, coloured.
*
* Built when the row is composed rather than up front: a file has far more lines than a screen
* shows, and an `AnnotatedString` per line for all of them is the cost the lazy list exists to
* avoid.
* One line, coloured. Built when the row is composed rather than up front: a file has far more
* lines than a screen shows, and an `AnnotatedString` per line for all of them is the cost the
* lazy list exists to avoid.
*/
fun line(index: Int): AnnotatedString {
val text = lines[index]
@@ -60,16 +56,13 @@ private constructor(
*
* Exactly one trailing newline is dropped before splitting, so a file that ends the way
* text files are supposed to end has the number of lines its author would count -- `wc -l`
* agrees, and so does every editor. Without that, every well-formed file gained a phantom
* empty last line, which is a wrong line number on every file in the repository. An empty
* file is one empty line numbered 1, which is what it is: a file with nothing in it still
* has somewhere for a cursor to go.
* agrees. Without that, every well-formed file gained a phantom empty last line. An empty
* file is one empty line numbered 1, which is what it is.
*/
fun of(text: String, language: Language?): FileLines =
// Timed, and always, for the same reason everything else here is: the cost of opening
// a large file is the number that decides whether the server's size limit is right,
// and an instrument that is only in the build nobody is running answers nothing. It
// lands in the render report beside the transcript's own figures.
// Timed, and always, for the reason everything else here is: the cost of opening a
// large file is the number that decides whether the server's size limit is right, and
// an instrument that is only in the build nobody is running answers nothing.
DebugStats.timed("file scanned and cut into lines") {
val body = text.removeSuffix("\n")
val lines = body.split('\n')
@@ -80,10 +73,9 @@ private constructor(
/**
* How many columns a line occupies.
*
* A tab counts as eight rather than as one, and deliberately upwards: this decides how far
* the viewer can scroll, and over-estimating leaves a little empty space past the longest
* line where under-estimating makes the end of that line unreachable. Compose draws a tab
* as a single advance, so eight is the generous reading rather than the accurate one.
* A tab counts as eight rather than one, and deliberately upwards: this decides how far the
* viewer can scroll, and over-estimating leaves a little empty space past the longest line
* where under-estimating makes the end of that line unreachable.
*/
private fun columnsOf(line: String): Int {
var count = 0
@@ -95,10 +87,9 @@ private constructor(
* The scanner's spans, in file offsets, as spans per line in line offsets.
*
* One walk down both lists, which is what the scanner's guarantee buys: its spans come out
* ordered, non-overlapping and inside the text, so a span can only belong to the line the
* walk has reached or to ones after it. A span crossing a line break -- a block comment, a
* multi-line string -- is cut at each break and appears in each line it covers, because a
* row is drawn on its own and cannot inherit a colour from the row above.
* ordered, non-overlapping and inside the text. A span crossing a line break is cut at each
* break and appears in each line it covers, because a row is drawn on its own and cannot
* inherit a colour from the row above.
*/
private fun bucket(lines: List<String>, spans: List<Span>): List<List<Span>> {
val out = ArrayList<List<Span>>(lines.size)
app/androidApp/src/main/kotlin/com/example/aiapp/FileViewer.kt
+42 -60
View File
@@ -50,15 +50,12 @@ fun codeStyle(): TextStyle =
/**
* [content] scanned off the main thread, then drawn.
*
* Measured on the emulator on 2026-09-04: [FileLines.of] takes **460ms** on a 1 MiB Rust file
* (28,660 lines) and 11ms on 32 kB. Called from a `remember` inside the composition, as it was
* first written, that is 460ms of frozen screen at the size the server is willing to send -- long
* enough that the accessibility tree cannot be read, which is what "the app has stopped" looks like
* from outside. So it runs on [Dispatchers.Default] and the spinner is what the reader sees
* meanwhile, in the place the file will appear.
* Measured on the emulator 2026-09-04: [FileLines.of] takes **460ms** on a 1 MiB Rust file (28,660
* lines) and 11ms on 32 kB. Called from a `remember` inside the composition, as it was first
* written, that is 460ms of frozen screen at the size the server is willing to send -- long enough
* that the accessibility tree cannot be read, which is what "the app has stopped" looks like.
*
* Keyed on the text and the language, so re-reading the same file does not rescan it and a file
* that changed does.
* Keyed on the text and the language, so re-reading the same file does not rescan it.
*/
@Composable
fun ScannedFile(content: String, language: Language?, modifier: Modifier = Modifier) {
@@ -76,39 +73,31 @@ fun ScannedFile(content: String, language: Language?, modifier: Modifier = Modif
* A file, one line per row, coloured by the same scanner that colours a reply's code fences.
*
* A `LazyColumn` of lines rather than one `Text`, because text layout is linear in the text: a
* twenty-thousand-line file in a single `Text` measures all of it to draw a screenful, and the
* scroll never recovers. The cost of the choice is that each row needs its own colours, which is
* what [FileLines] works out once and off this thread.
* twenty-thousand-line file in a single `Text` measures all of it to draw a screenful. The cost is
* that each row needs its own colours, which is what [FileLines] works out once and off this
* thread.
*
* Lines do not wrap. They share one horizontal scroll state, so the whole file moves sideways as a
* block and a long line does not silently become three -- which would put the gutter's numbers
* against the wrong text, the one thing a numbered listing must never do. Because nothing wraps, a
* logical line is one visual line and the two cannot drift.
* against the wrong text.
*
* **Every row is given the same content width**, and that is what makes the shared scroll state
* behave. `Modifier.horizontalScroll` is a node per row, and each one coerces the shared offset
* into *its own* range -- `content width - viewport` -- so with rows of their natural widths a
* short line's range is zero and it never moves at all while a long one beside it does. Each row
* also writes `maxValue` on the shared state as it measures, so how far the file could be dragged
* was decided by whichever row happened to measure last and changed as the list scrolled. Both
* disappear once every row is [FileLines.columns] wide: one range, one maximum, and the file moves
* as the block this comment always claimed it was. Reported by Iris on 2026-09-04 as "it seems to
* affect different rows differently", which is exactly what a per-row range looks like.
* short line's range is zero and it never moves while a long one beside it does. Each row also
* writes `maxValue` as it measures, so how far the file could be dragged was decided by whichever
* row measured last. Both disappear once every row is [FileLines.columns] wide. Reported by Iris on
* 2026-09-04 as "it seems to affect different rows differently", which is what a per-row range
* looks like.
*
* The stretch at the ends of the travel is **one** effect for the whole file, rendered on the box
* around the list rather than by each row. `horizontalScroll` makes its own per node otherwise, so
* only the line under the finger stretched and the rest of the file sat still beside it -- the same
* complaint as the offsets above, one layer further out. Handing every row the same effect and
* rendering it once is what makes the file bend as the block it scrolls as. Only possible because
* every row now has the same range: rows that disagreed about where the end was would disagree
* about when to stretch.
* around the list rather than by each row -- `horizontalScroll` makes its own per node otherwise,
* so only the line under the finger stretched. Only possible because every row now has the same
* range.
*
* The gutter is **beside** the scrolling box rather than inside its rows, which is what keeps the
* numbers out of both effects: they do not travel with the text and they do not bend with it. The
* rows leave a spacer where the numbers will go and [LineGutter] draws them there. Its width is
* measured from the digit count of the line count in the very style it is drawn in, so a nine-line
* file and a twelve-thousand-line file each get exactly what they need and nothing is nudged by
* hand.
* numbers out of both effects. The rows leave a spacer and [LineGutter] draws them there; its width
* is measured from the digit count of the line count in the style it is drawn in.
*
* Moving them out also takes them out of the [SelectionContainer], so selecting part of a file and
* copying it gives the code rather than the code with a number in front of every line.
@@ -139,8 +128,8 @@ fun FileViewer(lines: FileLines, modifier: Modifier = Modifier) {
softWrap = false,
// The scroll outside the width: the scrolling node's viewport is
// what the row has room for, and its content is the whole file's
// widest line. The shared effect is given to every row and
// rendered by none of them -- see the box above.
// widest line. The shared effect is given to every row and rendered
// by none of them -- see the box above.
modifier =
Modifier.horizontalScroll(scroll, overscroll).width(content),
)
@@ -157,24 +146,20 @@ fun FileViewer(lines: FileLines, modifier: Modifier = Modifier) {
* The line numbers, drawn beside the file rather than in it.
*
* They have to be outside the box the stretch is rendered on, or they bend with the text; and they
* have to stay exactly level with the lines they number, which is the one thing a numbered listing
* may never get wrong. Those two pull in opposite directions -- out of the list, but pinned to it.
* have to stay exactly level with the lines they number. Those two pull in opposite directions.
*
* A [SubcomposeLayout] is what settles it. *Which* numbers exist and *where* each goes both come
* from the list's own `layoutInfo`, read in the measure block -- and subcomposition happens during
* measurement, so this is not composing from a value it read a frame ago, it is composing from the
* answer the list has just produced. A `Column` translated by the scroll position could not do
* that: the translation would be a layout read and current while the set of numbers would be a
* composition behind it, so during a fling the numbers would slide against their lines.
* measurement, so this composes from the answer the list has just produced rather than one it read
* a frame ago. A `Column` translated by the scroll position could not: the translation would be
* current while the set of numbers was a composition behind, so during a fling the numbers would
* slide against their lines.
*
* The list is measured before this is -- they are siblings in a `Box` and it is declared first --
* and a scroll that remeasures the list on its own does so synchronously, ahead of the layout pass,
* which is the same reason a lazy list does not lag its own content.
* The list is measured before this is -- they are siblings in a `Box` and it is declared first.
*
* `onSurfaceVariant`, because a number is not part of the file: it is this app numbering it, and
* the text's own colour would put it in the same voice as the code. The background is painted
* because the stretch can carry the text sideways under this column, and a digit with a smear of
* code behind it reads as a rendering fault.
* `onSurfaceVariant`, because a number is not part of the file. The background is painted because
* the stretch can carry the text sideways under this column, and a digit with a smear of code
* behind it reads as a rendering fault.
*/
@Composable
private fun LineGutter(rows: LazyListState, width: Dp, style: TextStyle) {
@@ -205,10 +190,9 @@ private fun LineGutter(rows: LazyListState, width: Dp, style: TextStyle) {
/**
* How wide the widest line number is, measured rather than guessed.
*
* `9` repeated, because digits in a monospace face are all one width and the count's own digits
* would measure the same -- what matters is how many there are. Measuring in the style the numbers
* are drawn in is what makes this survive a font size, a density or a display scale nobody here
* chose.
* `9` repeated, because digits in a monospace face are all one width -- what matters is how many
* there are. Measuring in the style the numbers are drawn in is what makes this survive a font
* size, a density or a display scale nobody here chose.
*/
@Composable
fun gutterWidth(lineCount: Int, style: TextStyle): Dp {
@@ -225,15 +209,15 @@ fun gutterWidth(lineCount: Int, style: TextStyle): Dp {
/**
* How wide to make every row: the widest line in the file, in this style.
*
* One character measured rather than the line itself, because the face is monospace -- every
* advance is the same -- and measuring the actual widest line of a twenty-thousand-line file is
* work for an answer arithmetic already has. Sixty-four of them, divided, so the answer does not
* carry a whole character's worth of rounding.
* One character measured rather than the line itself, because the face is monospace and measuring
* the actual widest line of a twenty-thousand-line file is work for an answer arithmetic already
* has. Sixty-four of them, divided, so the answer does not carry a whole character's worth of
* rounding.
*
* Capped, because this becomes a fixed width in a layout and Compose cannot represent an arbitrary
* one: a minified file is a single line of a hundred thousand characters, and asking to lay that
* out as one row is a crash rather than a slow scroll. Past the cap the far end of such a line
* cannot be reached, which is the tolerable half of that trade.
* one: a minified file is a single line of a hundred thousand characters, and laying that out as
* one row is a crash rather than a slow scroll. Past the cap the far end of such a line cannot be
* reached, which is the tolerable half of that trade.
*/
@Composable
private fun contentWidth(columns: Int, style: TextStyle): Dp {
@@ -252,9 +236,7 @@ private fun contentWidth(columns: Int, style: TextStyle): Dp {
private const val MAX_CONTENT_PX = 100_000f
/**
* The space between the numbers and the code.
*
* A gap, not an alignment: the two are already aligned by the row, and this is only so the digits
* and the first character of the line are not touching.
* The space between the numbers and the code. A gap, not an alignment: the two are already aligned
* by the row, and this is only so the digits and the first character are not touching.
*/
val GUTTER_GAP = 8.dp
app/androidApp/src/main/kotlin/com/example/aiapp/FilesScreen.kt
+20 -24
View File
@@ -45,7 +45,7 @@ import kotlinx.coroutines.withContext
* Which machine's files to show, and where to start.
*
* A **setup**, not a session: a filesystem is a property of a machine, and a session only says
* where it was working. That is what makes a second way in -- from the setups tab, say -- one more
* where it was working. That is what makes a second way in -- from the setups tab -- one more
* caller rather than any new code here.
*/
data class FilesTarget(val setup: String, val setupName: String, val start: String)
@@ -61,13 +61,13 @@ private sealed class Spot(val path: String) {
* The files on the machine a session runs on: browse them, read one, change one.
*
* Drawn **over** the session rather than instead of it (see [AppRoot]), so its event stream keeps
* flowing, its draft and scroll position stay where they were, and coming back from a file costs
* nothing. Back steps one level inside here -- editor to viewer, viewer to the directory it came
* from, directory to the one above it -- and only closes from where it opened.
* flowing and coming back from a file costs nothing. Back steps one level inside here -- editor to
* viewer, viewer to the directory it came from, directory to the one above -- and only closes from
* where it opened.
*
* Every directory that has been visited is kept for as long as this is open, so stepping back is
* instant; the refresh glyph is how a directory gets asked again on purpose, and creating something
* refetches the directory it was created in, since that is the one thing that changed.
* Every directory that has been visited is kept for as long as this is open; the refresh glyph is
* how one gets asked again on purpose, and creating something refetches the directory it was
* created in.
*/
@Composable
fun FilesScreen(settings: ServerSettings, target: FilesTarget, onClose: () -> Unit) {
@@ -121,17 +121,16 @@ fun FilesScreen(settings: ServerSettings, target: FilesTarget, onClose: () -> Un
Box(
Modifier.fillMaxSize()
.background(MaterialTheme.colorScheme.background)
// The session under this deliberately takes no keyboard inset (see SessionScreen's
// layout note), so the explorer adds its own -- otherwise the editor types under the
// keyboard.
// The session under this deliberately takes no keyboard inset, so the explorer adds its
// own -- otherwise the editor types under the keyboard.
.imePadding()
) {
Column(Modifier.fillMaxSize()) {
when (val spot = here) {
is Spot.Dir -> {
val state = listings[spot.path] ?: LoadState.Loading
// The resolved path once there is one: a directory opened as `~` is called
// what it turned out to be, not what it was asked for.
// The resolved path once there is one: a directory opened as `~` is called what
// it turned out to be, not what it was asked for.
val at = (state as? LoadState.Loaded)?.value?.path ?: spot.path
FilesHeader(
title = baseName(at),
@@ -304,9 +303,8 @@ private fun ColumnScope.DirectoryBody(state: LoadState<Listing>, onOpen: (Spot)
*
* A symlink says so instead of giving a size, because the size a listing reports for one is the
* length of the path it points at -- a number that looks exactly like a file size and is about
* something else entirely. `other` covers a fifo, a device, and a link whose target is gone: the
* row still appears, because a directory that hid what it held would be lying about being empty,
* and the word is there because a colour cannot say "this is a different kind of thing".
* something else. `other` covers a fifo, a device, and a link whose target is gone: the row still
* appears, because a directory that hid what it held would be lying about being empty.
*/
private fun trailingOf(entry: DirEntry): String? =
when {
@@ -350,8 +348,7 @@ private fun EntryRow(glyph: String, name: String, trailing: String?, onClick: ()
*
* Its own composable so that everything about one file -- what came back, what has been typed, and
* whether a save is out -- is remembered under that file's path and thrown away when the reader
* moves to another. What is *not* here is edit mode itself: back has to know about it, and back
* belongs to the screen.
* moves to another. What is *not* here is edit mode itself: back has to know about it.
*/
@Composable
private fun ColumnScope.DocPane(
@@ -423,8 +420,8 @@ private fun ColumnScope.DocPane(
onDirty(false)
onEditing(false)
} catch (e: ApiException) {
// The one refusal that is a question rather than a message: somebody else's edit
// is on the machine, and which of the two survives is not this app's to decide.
// The one refusal that is a question rather than a message: somebody else's edit is
// on the machine, and which of the two survives is not this app's to decide.
if (e.status == 409) conflict = e.message ?: "It changed on the machine."
else saveError = e.message
} finally {
@@ -467,10 +464,10 @@ private fun ColumnScope.DocPane(
)
}
// Why the pencil is off. A disabled control teaches what the thing can do, but it cannot say
// why it is disabled -- and a reader who cannot edit a file they can plainly read will
// otherwise conclude the app is broken. Said once, here, rather than waiting for a tap that a
// disabled button never receives.
// Why the pencil is off. A disabled control teaches what the thing can do but cannot say why it
// is disabled -- and a reader who cannot edit a file they can plainly read will otherwise
// conclude the app is broken. Said once, here, rather than waiting for a tap a disabled button
// never gets.
if (loaded != null && !editable) {
Text(
"Too big to edit here (${humanSize(loaded.size)}; the limit is " +
@@ -687,6 +684,5 @@ internal fun baseName(path: String): String {
return if (trimmed.isEmpty()) "/" else trimmed.substringAfterLast('/')
}
/** A resolved directory and a name in it, as one path. */
internal fun join(directory: String, name: String): String =
if (directory.endsWith("/")) "$directory$name" else "$directory/$name"
app/androidApp/src/main/kotlin/com/example/aiapp/FrameStats.kt
+5 -9
View File
@@ -19,19 +19,15 @@ import androidx.compose.ui.platform.LocalContext
* The point of splitting it up is that "the scroll is laggy" has two completely different causes
* and one appearance. If the layout-and-measure and draw figures are small and the total is large,
* the time is going into rasterising and compositing, and no amount of doing less work per row will
* move it. If they are large, the work per row is the problem and it is ours to fix. Guessing
* between those two is how a day gets spent rewriting the half that was already fast.
* move it. If they are large, the work per row is the problem and it is ours to fix.
*
* The phases are the platform's own: [FrameMetrics] reports each frame's cost in nanoseconds,
* broken down into the parts the UI thread is responsible for -- handling input, running
* animations, measuring and laying out, recording the draw -- and the parts after it.
* broken into the parts the UI thread is responsible for and the parts after it.
*
* One of these for the app, like [DebugStats], because the two are read as one report and
* [drawAccounting] divides one by the other. Held per screen it was emptied by leaving a session
* and the counters were not, so a report copied after visiting two sessions divided every session's
* work by the newest one's frame count -- and printed the result as a per-frame measurement. It
* said 36.8 seconds of placement inside a 13.5 second window, and left "everything else" clamped at
* 0.00ms (0%), which reads as a screen whose whole cost is this app's own code.
* work by the newest one's frame count -- 36.8 seconds of placement inside a 13.5 second window.
*/
object FrameStats {
private val total = ArrayList<Long>()
@@ -54,7 +50,7 @@ object FrameStats {
total += metrics.getMetric(FrameMetrics.TOTAL_DURATION)
// How long the frame waited for the UI thread to be free before it could start. Reported
// because the phases otherwise do not add up to the total, and the gap is the interesting
// part: it is the frame being held up by work that is not the frame's.
// part: the frame being held up by work that is not the frame's.
waited += metrics.getMetric(FrameMetrics.UNKNOWN_DELAY_DURATION)
input += metrics.getMetric(FrameMetrics.INPUT_HANDLING_DURATION)
animation += metrics.getMetric(FrameMetrics.ANIMATION_DURATION)
@@ -123,7 +119,7 @@ private const val CAP = 20_000
* Records into [FrameStats] for as long as this screen is on it.
*
* The listener is what comes and goes; what it writes into does not, so a report covers the same
* stretch of time as the counters beside it. See [FrameStats].
* stretch of time as the counters beside it.
*
* The listener is handed its own thread because the platform calls it for every frame and the
* documentation is explicit that doing that on the main thread taxes the very thing being measured.
app/androidApp/src/main/kotlin/com/example/aiapp/Highlighter.kt
+6 -8
View File
@@ -47,12 +47,11 @@ data class SyntaxPalette(
/**
* [code] with its keywords, strings and comments coloured, or plain if there is no language for it.
*
* Shared by a tool call's input ([ToolInputView]) and a reply's fences ([CodeFence]), so the same
* code is the same colours wherever it appears.
* Shared by a tool call's input and a reply's fences, so the same code is the same colours wherever
* it appears.
*
* Not a composable, and it takes no colour from the theme, because that is what lets [warm] run it
* off the drawing thread: the syntax palette is fixed, and a fence with no language is plain text
* which needs no colour of its own -- the style the caller draws it with carries that.
* off the drawing thread.
*
* The timing is the number the highlighter is judged by: the library this replaced took **174ms**
* on the emulator for a two-hundred-line Kotlin fence, which is why [ParsedReplies.highlighted]
@@ -82,8 +81,7 @@ fun highlight(code: String, language: Language?): AnnotatedString {
* to the end of the code, which is also what it looks like while a fence is still being written.
*
* In ordinary code the order of recognition is comment, string, attribute, number, word, and
* finally a single punctuation or mark character. Punctuation and marks are coloured only in
* ordinary code, never inside a string or a comment.
* finally a single punctuation or mark character, which are coloured only in ordinary code.
*/
fun scan(code: String, rules: Rules): List<Span> = Scanner(code, rules).run()
@@ -156,8 +154,8 @@ private class Scanner(private val code: String, private val rules: Rules) {
at += comment.open.length
var depth = 1
while (at < code.length && depth > 0) {
// The closer is tried first so that a language whose two delimiters are the same
// string -- CoffeeScript's `###` -- closes rather than nesting forever.
// The closer is tried first so that a language whose two delimiters are the same string
// -- CoffeeScript's `###` -- closes rather than nesting forever.
if (starts(comment.close)) {
depth--
at += comment.close.length
app/androidApp/src/main/kotlin/com/example/aiapp/ImportScreen.kt
+80 -118
View File
@@ -49,11 +49,9 @@ private const val DELETING = "deleting"
/**
* What the rows further down a batch say while they wait their turn.
*
* Its own word rather than the operation's, because it is its own state and the difference is the
* kind that matters: nothing has been done to this session yet, so a batch stopped here leaves it
* exactly as it was. Marked from the moment the batch is handed over all the same -- a queued row
* that still looked ordinary was still tappable, and tapping it would import it a second time
* behind the batch already coming for it.
* Its own word rather than the operation's, because nothing has been done to this session yet, so a
* batch stopped here leaves it exactly as it was. Marked from the moment the batch is handed over
* all the same -- a queued row that still looked ordinary was still tappable.
*/
private const val WAITING = "waiting"
@@ -62,25 +60,22 @@ private const val WAITING = "waiting"
*
* A batch takes rows out of the list as each one lands, so everything below the one that went
* slides up -- and a tap already on its way then arrives at whichever row moved into that place. On
* this screen that means importing a session nobody chose, which is not something a second tap can
* undo.
* this screen that means importing a session nobody chose.
*
* Swallowed silently rather than shown, because anything drawn on every row a batch passes would be
* a flicker running down the list. Half a second: long enough to cover a tap already travelling
* when the row moved, short enough that it is not in the way of a deliberate one.
* a flicker running down the list.
*/
private const val SETTLE_MS = 500L
/**
* Continuing a Claude Code session the machine already has.
*
* The list is the machine's answer, not this app's: it asks a setup what sessions it holds and
* shows them. Choosing one sends its **id**, never a path, so an enrolled phone cannot turn this
* screen into a file reader.
* The list is the machine's answer, not this app's. Choosing one sends its **id**, never a path, so
* an enrolled phone cannot turn this screen into a file reader.
*
* Holding a row selects it and puts the screen in selection mode, where the options that act on a
* selection appear along the bottom. That exists because these arrive in bulk — a machine
* accumulates dozens of abandoned sessions — and one confirmation dialog per row is the reason
* selection appear along the bottom. That exists because these arrive in bulk -- a machine
* accumulates dozens of abandoned sessions -- and one confirmation dialog per row is the reason
* clearing them out was not worth doing.
*/
@OptIn(ExperimentalFoundationApi::class)
@@ -91,28 +86,25 @@ fun ImportScreen(settings: ServerSettings, reloadToken: Int, onImported: (Sessio
var chosen by remember { mutableStateOf<Setup?>(null) }
var sessions by remember { mutableStateOf<LoadState<List<Importable>>>(LoadState.Loading) }
// What is happening to each row right now, as the word the row shows: "importing" or
// "deleting". A map keyed by id rather than a flag per row, because the rows are rebuilt from
// whatever the server last said and this belongs to the request rather than to the session --
// the same arrangement the session list uses for its deletes.
// What is happening to each row right now, as the word the row shows. A map keyed by id rather
// than a flag per row, because the rows are rebuilt from whatever the server last said and this
// belongs to the request rather than to the session.
var running by remember { mutableStateOf<Map<String, String>>(emptyMap()) }
// Which rows the reader has picked out. Empty means selection mode is off: there is no
// separate flag, because a selection mode with nothing selected is a state with no controls
// in it and no way to leave except Back.
// Which rows the reader has picked out. Empty means selection mode is off: a selection mode
// with nothing selected is a state with no controls in it and no way to leave except Back.
var selected by remember { mutableStateOf<Set<String>>(emptySet()) }
// Failures that belong to one row rather than to the screen, shown on that row. A batch is
// exactly where a single banner fails: nine deletes succeeded and one did not, and the
// banner cannot say which.
// exactly where a single banner fails: nine deletes succeeded and one did not, and the banner
// cannot say which.
var rowErrors by remember { mutableStateOf<Map<String, String>>(emptyMap()) }
// Deleting a transcript cannot be undone, so it is asked rather than done. Held as the rows
// themselves, not a flag, so the dialog can say what it is about.
var confirming by remember { mutableStateOf<List<Importable>?>(null) }
// Same default as the spawn screen, and for the same reason: a phone
// is the wrong place to answer "allow Bash?" forty times.
// Same default as the spawn screen: a phone is the wrong place to answer "allow Bash?" forty
// times.
var permissionMode by remember { mutableStateOf("auto") }
// When each row last slid upwards, as a plain map rather than state: nothing is drawn from
// it, so a tap reading it needs no recomposition and there is no timer to cancel when a
// second removal lands on top of the first.
// When each row last slid upwards, as a plain map rather than state: nothing is drawn from it,
// so a tap reading it needs no recomposition.
val movedAt = remember { mutableMapOf<String, Long>() }
fun settling(id: String) = System.currentTimeMillis() - (movedAt[id] ?: 0L) < SETTLE_MS
@@ -120,8 +112,7 @@ fun ImportScreen(settings: ServerSettings, reloadToken: Int, onImported: (Sessio
* Fetches the list and takes the row states from it.
*
* Taken from the answer rather than kept across the load: the server is what knows what is
* running, and this screen may be opening on work another screen -- or another phone --
* started. Anything held locally would be a second version of that, and the stale one.
* running, and this screen may be opening on work another phone started.
*/
suspend fun fetchInto(setup: Setup): LoadState<List<Importable>> =
try {
@@ -167,13 +158,11 @@ fun ImportScreen(settings: ServerSettings, reloadToken: Int, onImported: (Sessio
* Hands [targets] to the server in one request, marking every row it covers.
*
* The request only *starts* the work -- the server runs it and says how each row went on the
* change stream, which is what lets this screen be left while a batch is still going. So there
* is nothing here to wait for and nothing to sequence: the rows are marked, the batch goes, and
* everything after that arrives as an event.
* change stream, which is what lets this screen be left while a batch is still going.
*
* Marked [WAITING] rather than with the operation's own word until the server confirms. Between
* the request leaving and the `started` event coming back, "we have asked" is the truth and "it
* is importing" is a guess -- and the row is inert either way, which is the part that matters.
* is importing" is a guess.
*
* The selection is dropped as the work is handed over, not when it finishes: the screen goes
* back to how it started, and what says the work is happening is the rows it is happening to.
@@ -186,17 +175,14 @@ fun ImportScreen(settings: ServerSettings, reloadToken: Int, onImported: (Sessio
val ids = targets.map { it.id }
scope.launch {
// One request for the whole batch, not one per row. Sent row by row, a handover was
// only as atomic as the network: the fourth of six could fail, or the screen could be
// left with two still unsent, and what came back was some rows running and some
// untouched -- indistinguishable, on the list, from rows nobody had picked. Now
// either the server has the batch or it has none of it, and this is the one place
// that can be true.
// only as atomic as the network, and what came back was some rows running and some
// untouched -- indistinguishable, on the list, from rows nobody had picked.
try {
withContext(Dispatchers.IO) { send(ids) }
} catch (err: Exception) {
// The server never took it, so nothing is running and no event will arrive to say
// so. This is the one failure the screen must report itself -- and it is now the
// whole batch's failure, which is the point: no row was singled out.
// so. This is the one failure the screen must report itself -- and it is the whole
// batch's failure, which is the point: no row was singled out.
running = running - ids.toSet()
rowErrors = rowErrors + ids.associateWith { err.message ?: "Couldn't ask" }
return@launch
@@ -205,19 +191,17 @@ fun ImportScreen(settings: ServerSettings, reloadToken: Int, onImported: (Sessio
// Then ask what actually happened, if anything still looks outstanding.
//
// The change stream is a broadcast with no memory, so an operation that started and
// finished while it was still connecting is one nothing will ever be said about --
// and the row sits marked for ever. That is not hypothetical: with responses held
// back far enough for the stream to open late, one row of a pair of deletes cleared
// and the other stayed on "waiting".
// finished while it was still connecting is one nothing will ever be said about -- and
// the row sits marked for ever. That is not hypothetical: with responses held back far
// enough, one row of a pair of deletes cleared and the other stayed on "waiting".
//
// The listing is the repair, because it carries the same state the events do. Only
// when something still looks outstanding, so the ordinary case -- where the events
// arrived and the rows are already gone -- does not pay for a second listing, which
// is the most expensive call this screen makes.
// The listing is the repair, because it carries the same state the events do. Only when
// something still looks outstanding, so the ordinary case does not pay for a second
// listing, which is the most expensive call this screen makes.
if (setup != null && targets.any { running.containsKey(it.id) }) {
// Quietly: no Loading, because blanking the list to report on rows that are
// already saying what is happening to them is the flicker this screen avoids
// everywhere else.
// Quietly: no Loading, because blanking the list to report on rows that are already
// saying what is happening to them is the flicker this screen avoids everywhere
// else.
sessions = fetchInto(setup)
}
}
@@ -225,13 +209,6 @@ fun ImportScreen(settings: ServerSettings, reloadToken: Int, onImported: (Sessio
val provider = chosen?.providers?.firstOrNull { it.kind == "claude_cli" }
/**
* Imports [targets], and goes to the session it made when [thenOpen].
*
* One function for the tap and for the bar, differing in that one flag: continuing a session
* and then looking at it is what a tap on a row means, and a batch has several results and no
* reason to pick one of them to become the screen.
*/
/** Continues [targets] in the background, leaving the screen where it is. */
fun importAll(targets: List<Importable>) {
val setup = chosen ?: return
@@ -283,13 +260,12 @@ fun ImportScreen(settings: ServerSettings, reloadToken: Int, onImported: (Sessio
}
}
// Live changes to what the server is doing to these sessions, for as long as this screen is
// up. The listing already carried the same state when the screen opened -- this is what keeps
// it current afterwards, including for work another screen or another phone started.
// Live changes to what the server is doing to these sessions, for as long as this screen is up.
// The listing already carried the same state when the screen opened -- this is what keeps it
// current afterwards, including for work another phone started.
//
// Failures here are deliberately quiet. There is nothing for a reader to do about a dropped
// event stream, and nothing is lost by one: every state it would have carried is in the next
// listing, which is what Refresh and re-entering the tab already fetch.
// event stream, and every state it would have carried is in the next listing.
val liveChanges = remember {
java.util.concurrent.atomic.AtomicReference<ImportableStream?>(null)
}
@@ -307,8 +283,7 @@ fun ImportScreen(settings: ServerSettings, reloadToken: Int, onImported: (Sessio
running =
running + (change.session to (change.operation ?: WAITING))
// Gone from the machine either way: a delete removed the
// transcript, an import made it a session, and neither is
// something this list still has to offer.
// transcript, an import made it a session.
"finished" -> {
running = running - change.session
forget(change.session)
@@ -323,17 +298,14 @@ fun ImportScreen(settings: ServerSettings, reloadToken: Int, onImported: (Sessio
}
}
} catch (e: kotlinx.coroutines.CancellationException) {
// The screen leaving, not a failure -- and swallowing it would leave this
// loop reconnecting to a stream nobody is watching.
// The screen leaving, not a failure -- and swallowing it would leave this loop
// reconnecting to a stream nobody is watching.
throw e
} catch (_: Exception) {
// Retried below; the listing is the truth in the meantime.
//
// Any failure, not only an [ApiException]. A stream is an optimisation over
// the listing here, so nothing it can do is worth taking the app down for --
// and catching only the failure that was expected means an unexpected one
// reaches the top of the app and closes it, from a screen that is merely
// loading a list.
// Retried below; the listing is the truth in the meantime. Any failure, not
// only an [ApiException]: a stream is an optimisation over the listing here,
// and catching only the expected failure means an unexpected one closes the app
// from a screen that is merely loading a list.
} finally {
stream.close()
}
@@ -351,9 +323,8 @@ fun ImportScreen(settings: ServerSettings, reloadToken: Int, onImported: (Sessio
// Nested inside MainScreen's own handler, so it wins while there is a selection.
BackHandler(enabled = selected.isNotEmpty()) { selected = emptySet() }
// Measured rather than assumed: the list reserves exactly what the bar covers, so the last
// row can still be scrolled to while it is up, and nothing is nudged by a number that was
// right for one font size.
// Measured rather than assumed: the list reserves exactly what the bar covers, so the last row
// can still be scrolled to while it is up.
var barHeight by remember { mutableStateOf(0.dp) }
val density = LocalDensity.current
@@ -428,8 +399,8 @@ fun ImportScreen(settings: ServerSettings, reloadToken: Int, onImported: (Sessio
}
}
// Beside nothing in particular, because a selection is not one row: the options that act
// on it belong to the screen, and the bottom is where a thumb already is.
// Beside nothing in particular, because a selection is not one row: the options that act on
// it belong to the screen, and the bottom is where a thumb already is.
if (selected.isNotEmpty()) {
val picked =
(sessions as? LoadState.Loaded)?.value?.filter { it.id in selected }.orEmpty()
@@ -486,8 +457,7 @@ fun ImportScreen(settings: ServerSettings, reloadToken: Int, onImported: (Sessio
* What can be done to the rows that are selected.
*
* Delete and Import only, for now: they are the two things this screen has ever done to a session,
* and an option that appears here has to work on every row in a selection rather than on the one
* somebody was thinking of.
* and an option that appears here has to work on every row in a selection.
*/
@Composable
private fun SelectionBar(
@@ -567,26 +537,23 @@ private fun ImportableList(
Modifier.fillMaxWidth()
.padding(vertical = 4.dp)
.combinedClickable(
// Off while something is happening to this row --
// see [BusyItem], which draws that but deliberately
// leaves the gestures alone so the list still
// scrolls.
// Off while something is happening to this row -- see
// [BusyItem], which draws that but leaves the gestures
// alone so the list still scrolls.
enabled = running[session.id] == null,
onClick = {
if (settling(session.id)) return@combinedClickable
// In selection mode a tap is a selection, so the
// reader is never one mis-tap away from starting
// a CLI they were only picking rows for.
// reader is never one mis-tap away from starting a
// CLI they were only picking rows for.
//
// Outside it, a tap continues the session --
// except on a row that cannot be continued,
// where it selects instead. That row's only
// remaining action is Delete, and a tap that
// did nothing at all would be a worse answer
// than one that offers the thing it can do.
// Two `--resume` processes on one transcript
// each replay the other's writes, which is why
// this must not simply try.
// Outside it, a tap continues the session -- except
// on a row that cannot be continued, where it
// selects instead. That row's only remaining action
// is Delete, and a tap that did nothing at all
// would be a worse answer. Two `--resume` processes
// on one transcript each replay the other's writes,
// which is why this must not simply try.
if (selecting || session.inUse == "yes")
onToggle(session)
else onOpen(session)
@@ -606,8 +573,7 @@ private fun ImportableList(
Spacer(Modifier.width(8.dp))
// Beside the title, because "which one was I just in" is
// the question this list answers and the order already
// reflects it -- the reader should be able to see the
// ordering they are being given rather than infer it.
// reflects it.
Text(
relativeTime(session.modified),
style = MaterialTheme.typography.bodySmall,
@@ -616,12 +582,11 @@ private fun ImportableList(
}
Spacer(Modifier.height(4.dp))
// The path first, and the only thing here that is cut: it is
// one long value with no natural break, where the lines below
// it are short enough to wrap readably. Cut at the head,
// because a path is identified by its tail and these all
// share a long prefix. By the row's real width rather than a
// character count, which was one guess for every font size
// and screen.
// one long value with no natural break. Cut at the head,
// because a path is identified by its tail and these all share
// a long prefix. By the row's real width rather than a
// character count, which was one guess for every font size and
// screen.
session.cwd
.takeIf { it.isNotEmpty() }
?.let { cwd ->
@@ -648,8 +613,7 @@ private fun ImportableList(
color = warningColor,
)
}
// Reported where it happened, in the server's own words, the
// way every other failure in this app is shown.
// Reported where it happened, in the server's own words.
errors[session.id]?.let { message ->
Spacer(Modifier.height(4.dp))
Text(
@@ -673,14 +637,14 @@ private fun statsOf(session: Importable): String =
// Said, because a name and a last message are different claims: one describes the
// session, the other is only what happened last in it.
if (session.named) "named" else null,
// What continuing it costs, which is the question this list is really asked. First
// of the measurements for that reason, and absent rather than zero when nothing has
// been measured -- a session with no turns yet has no figure, not a figure of none.
// What continuing it costs, which is the question this list is really asked. Absent
// rather than zero when nothing has been measured -- a session with no turns yet has no
// figure, not a figure of none.
session.contextTokens?.let { "${it / 1000}k context" },
"${session.lines} lines",
// Kept beside the context figure because the two disagree usefully: most of a large
// transcript is history from before a compaction, which the model is no longer
// given, so a big file can be cheap to continue and a small one expensive.
// transcript is history from before a compaction, so a big file can be cheap to
// continue.
humanSize(session.bytes),
)
.joinToString(" · ")
@@ -689,16 +653,14 @@ private fun statsOf(session: Importable): String =
* Why this session might not be safe to take, if it isn't.
*
* Words rather than only a colour: "open somewhere else" and "we could not check" differ in kind,
* and no shade distinguishes them. The colour is what makes it findable; the words are what make it
* actionable.
* and no shade distinguishes them.
*/
private fun warningOf(session: Importable): String? =
when (session.inUse) {
// What was measured is that a live process on that machine holds this session open. Which
// process is not measured, so it isn't claimed: "a terminal — close it there first" sent
// people looking for a window that need not exist. It is just as likely another agent, or
// this app on a session it spawned. Naming a place the reader then can't find turns a
// correct refusal into a wrong instruction.
// process is not measured, so it isn't claimed: "a terminal -- close it there first" sent
// people looking for a window that need not exist. Naming a place the reader then can't
// find turns a correct refusal into a wrong instruction.
"yes" -> "something on that machine is running it"
"unknown" -> "can't tell if it's open"
else -> null
app/androidApp/src/main/kotlin/com/example/aiapp/Languages.kt
+16 -19
View File
@@ -49,10 +49,9 @@ data class Rules(
/** Tokens that open a comment running to the end of the line. */
val lineComments: List<String> = emptyList(),
/**
* Whether [lineComments] count only at the start of a word.
*
* The shells need it: `$#`, `${#x}` and `a#b` are not comments, and greying the rest of those
* lines is one of the mistakes this scanner exists to stop.
* Whether [lineComments] count only at the start of a word. The shells need it: `$#`, `${#x}`
* and `a#b` are not comments, and greying the rest of those lines is one of the mistakes this
* scanner exists to stop.
*/
val lineCommentsAtWordStart: Boolean = false,
val blockComment: BlockComment? = null,
@@ -63,8 +62,8 @@ data class Rules(
val rawStrings: Boolean = false,
/**
* Rust: `'` opens a character literal only when a backslash or one character and a `'` follow.
* Otherwise it is a lifetime or a label and no string starts -- without this, `'a` opens a
* string that runs to the next apostrophe in the block.
* Otherwise it is a lifetime or a label -- without this, `'a` opens a string that runs to the
* next apostrophe in the block.
*/
val lifetimes: Boolean = false,
)
@@ -91,11 +90,10 @@ enum class Attributes {
* The spans [language] colours in [code] -- the one way to ask, whatever the language turns out to
* be made of.
*
* Nearly every language here is tokens: keywords, strings and comments, which is a row of [RULES]
* and the one shared scanner in [scan]. Markdown has none of those, and what a character means
* there depends on where on the line it sits, so it brings a scanner of its own ([scanMarkdown]).
* That is the whole extension point -- a new language is a row of rules or an entry in [SCANNERS],
* and no caller learns which one it got.
* Nearly every language here is tokens, which is a row of [RULES] and the one shared scanner.
* Markdown has none of those, and what a character means there depends on where on the line it
* sits, so it brings a scanner of its own. That is the whole extension point -- a new language is a
* row of rules or an entry in [SCANNERS], and no caller learns which one it got.
*/
fun spansOf(code: String, language: Language): List<Span> = SCANNERS.getValue(language)(code)
@@ -140,8 +138,8 @@ private val RULES: Map<Language, Rules> by lazy {
blockComment = C_STYLE,
quotes = listOf(DOUBLE, SINGLE),
),
// `###` opens and closes a block comment and `#` opens a line one, which is why the
// scanner tries the block opener first.
// `###` opens and closes a block comment and `#` opens a line one, which is why the scanner
// tries the block opener first.
Language.COFFEESCRIPT to
Rules(
keywords = KEYWORDS_COFFEESCRIPT,
@@ -162,8 +160,8 @@ private val RULES: Map<Language, Rules> by lazy {
keywords = KEYWORDS_FISH,
lineComments = listOf("#"),
lineCommentsAtWordStart = true,
// fish's single quotes escape only `\'` and `\\`, which is what "skip the
// character after a backslash" already does.
// fish's single quotes escape only `\'` and `\\`, which is what "skip the character
// after a backslash" already does.
quotes = listOf(DOUBLE, SINGLE),
),
Language.GO to
@@ -288,10 +286,9 @@ private val RULES: Map<Language, Rules> by lazy {
* The keyword sets.
*
* Every list below other than RON, TOML, fish and JSON came from dev.snipme:highlights 1.1.0
* (`SyntaxTokens.kt`, Apache-2.0), the library this scanner replaced, so that no fence which is
* coloured today turns plain. Entries that are not plain words were dropped -- Kotlin's `as?`,
* `!in` and `!is`, Swift's `#if` family, Ruby's `defined?`, CoffeeScript's `=` and `->` -- because
* the word scanner cannot reach them and the library only matched them by luck.
* (Apache-2.0), the library this scanner replaced, so that no fence which is coloured today turns
* plain. Entries that are not plain words were dropped -- Kotlin's `as?`, Swift's `#if` family,
* Ruby's `defined?` -- because the word scanner cannot reach them.
*/
private fun words(list: String): Set<String> =
list.split(Regex("\\s+")).filterNot(String::isEmpty).toSet()
app/androidApp/src/main/kotlin/com/example/aiapp/LoadState.kt
+1 -1
View File
@@ -8,7 +8,7 @@ package com.example.aiapp
* empty list, which is the one wrong answer that looks like a right one.
*
* [Loading] and [Error] carry no payload, so they are `LoadState<Nothing>` and this is covariant in
* [T]: one `LoadState.Loading` serves every screen rather than each needing its own.
* [T]: one `LoadState.Loading` serves every screen.
*/
sealed class LoadState<out T> {
data object Loading : LoadState<Nothing>()
app/androidApp/src/main/kotlin/com/example/aiapp/MainActivity.kt
+32 -45
View File
@@ -28,14 +28,13 @@ import androidx.compose.ui.layout.layout
import androidx.core.view.WindowCompat
class MainActivity : ComponentActivity() {
// Bumped whenever enrollment lands via an aiapp:// intent so the
// composition below re-reads the stored settings.
// Bumped whenever enrollment lands via an aiapp:// intent so the composition below re-reads the
// stored settings.
private var settingsVersion by mutableIntStateOf(0)
// The session a notification tap asked for, or null if nothing has. The
// serial is what makes a second tap on the same session's notification a
// second request: without it the two compare equal and the composition
// below has nothing to react to.
// The session a notification tap asked for, or null if nothing has. The serial is what makes a
// second tap on the same session's notification a second request: without it the two compare
// equal and the composition below has nothing to react to.
private var openRequest by mutableStateOf<SessionOpenRequest?>(null)
private var opens = 0
@@ -43,8 +42,8 @@ class MainActivity : ComponentActivity() {
private var shareRequest by mutableStateOf<ShareRequest?>(null)
private var shares = 0
// Registered up front since permission launchers must be registered
// before the activity reaches STARTED.
// Registered up front since permission launchers must be registered before the activity reaches
// STARTED.
private val requestLocalNetworkPermission =
registerForActivityResult(ActivityResultContracts.RequestPermission()) {}
@@ -52,8 +51,8 @@ class MainActivity : ComponentActivity() {
* The service starts either way, and posts nothing if this is refused.
*
* Deliberately not gated on the answer: the permission can be granted later from Android's own
* settings, and a service that only ever started at the moment it was granted would then stay
* down until the app was launched again -- which is the case notifications exist to avoid.
* settings, and a service that only ever started at the moment it was granted would stay down
* until the app was launched again.
*/
private val requestNotificationPermission =
registerForActivityResult(ActivityResultContracts.RequestPermission()) {}
@@ -64,21 +63,17 @@ class MainActivity : ComponentActivity() {
// Before anything else that could throw, so the first crash of a launch is caught too.
installCrashLog(this)
// Transparent status bar on every version; the Surface below paints
// through underneath it and content insets itself. Same reasoning
// as dev-updater's MainActivity.
// Transparent status bar on every version; the Surface below paints through underneath it
// and content insets itself. Same reasoning as dev-updater's MainActivity.
enableEdgeToEdge()
// Dark status-bar icons only over a light background, decided from the scheme rather
// than fixed. It was hardcoded to `true` -- dark icons -- which was right against the
// default light surface and became unreadable the moment the app wore Catppuccin Mocha.
// Asking the colour means a future palette change cannot reintroduce that: whatever
// `background` becomes, the icons follow it.
// Dark status-bar icons only over a light background, decided from the scheme rather than
// fixed. It was hardcoded to `true`, which was right against the default light surface and
// became unreadable the moment the app wore Catppuccin Mocha.
WindowCompat.getInsetsController(window, window.decorView).isAppearanceLightStatusBars =
AiAppColors.background.luminance() > 0.5f
// Android 17+ silently drops local-network traffic without this;
// requested up front because a denial is invisible at the socket
// layer (it just times out).
// Android 17+ silently drops local-network traffic without this; requested up front because
// a denial is invisible at the socket layer (it just times out).
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.CINNAMON_BUN) {
requestLocalNetworkPermission.launch(Manifest.permission.ACCESS_LOCAL_NETWORK)
}
@@ -88,16 +83,14 @@ class MainActivity : ComponentActivity() {
}
handleIntent(intent)
// After enrollment, so a first launch that arrives with a token
// starts the service with something to connect to rather than
// stopping it and waiting for the next launch.
// After enrollment, so a first launch that arrives with a token starts the service with
// something to connect to rather than stopping it and waiting for the next launch.
NotificationService.sync(this)
setContent {
// Selection colours with the theme rather than at each place text is drawn: the
// transcript is one selection container, and a selection that ran from a reply into
// the code block under it would otherwise change colour halfway. See
// [AiAppSelectionColors].
// transcript is one selection container, and a selection that ran from a reply into the
// code block under it would otherwise change colour halfway.
MaterialTheme(colorScheme = AiAppColors) {
CompositionLocalProvider(LocalTextSelectionColors provides AiAppSelectionColors) {
Surface(modifier = Modifier.fillMaxSize()) {
@@ -107,8 +100,7 @@ class MainActivity : ComponentActivity() {
// the frame's draw phase is where Compose's measurement lands, and
// a report saying "draw is high" cannot otherwise say whether the
// cost is the transcript or the chrome around it. The keyboard is
// the case that made it matter -- every frame of the IME animation
// relays out and re-records this whole box.
// the case that made it matter.
Modifier.layout { measurable, constraints ->
val started = System.nanoTime()
val placeable = measurable.measure(constraints)
@@ -135,19 +127,16 @@ class MainActivity : ComponentActivity() {
}
.fillMaxSize()
.statusBarsPadding()
// The gesture strip at the bottom of most
// phones. Without it the send row sits under
// the swipe area, where a tap is as likely to
// navigate away as to press a button.
// The gesture strip at the bottom of most phones. Without it
// the send row sits under the swipe area, where a tap is as
// likely to navigate away as to press a button.
//
// No imePadding here, deliberately: applied at the root it
// resizes this whole box on every frame of the keyboard
// animation, which re-measures, re-places and re-records every
// screen's entire tree per frame -- measured above as most of
// the frame budget. Each screen takes the keyboard itself
// (AppRoot wraps the ordinary ones; the session screen moves
// only its composer and transcript), so the per-frame cost is
// scoped to what actually moves.
// screen's entire tree per frame. Each screen takes the
// keyboard itself, so the per-frame cost is scoped to what
// actually moves.
.navigationBarsPadding()
) {
AppRoot(settingsVersion, openRequest, shareRequest)
@@ -158,9 +147,8 @@ class MainActivity : ComponentActivity() {
}
}
// launchMode="singleTop": an enrollment scan, or a notification tapped
// while the app is open, lands here rather than in a second activity
// instance.
// launchMode="singleTop": an enrollment scan, or a notification tapped while the app is open,
// lands here rather than in a second activity instance.
override fun onNewIntent(intent: Intent) {
super.onNewIntent(intent)
handleIntent(intent)
@@ -171,8 +159,7 @@ class MainActivity : ComponentActivity() {
*
* Three things arrive this way -- a share from another app, and an `aiapp://` URI that is
* either an enrollment code or a notification naming a session. The URIs are told apart by host
* rather than by two entry points, so a further kind is a branch here rather than another
* intent to remember to handle.
* rather than by two entry points, so a further kind is a branch here.
*/
private fun handleIntent(intent: Intent?) {
intent ?: return
@@ -195,8 +182,8 @@ class MainActivity : ComponentActivity() {
}
saveServerSettings(this, settings)
settingsVersion++
// Enrolling is the moment there is a backend to watch, and
// re-enrolling elsewhere is the moment the old one stops being it.
// Enrolling is the moment there is a backend to watch, and re-enrolling elsewhere is the
// moment the old one stops being it.
NotificationService.sync(this)
Toast.makeText(this, "Enrolled with ${settings.baseUrl}", Toast.LENGTH_LONG).show()
}
app/androidApp/src/main/kotlin/com/example/aiapp/MainScreen.kt
+22 -33
View File
@@ -29,12 +29,10 @@ import androidx.lifecycle.repeatOnLifecycle
* The app's root: one title, and four views of the backend behind it.
*
* These were four screens reached by four words in a row under the title, and the row was already
* full -- the comment it replaced recorded that a fifth would have to go somewhere else. Tabs say
* the same thing in less space and say one more thing besides: that these are places to be rather
* than errands to run. Sessions, the machine's importable history, the models on it and the
* machines themselves are all *the same backend*, looked at four ways, and none of them is a step
* down from another. Settings still is a step down, which is why it stays a pushed screen and keeps
* its own Back.
* full. Tabs say the same thing in less space and say one more thing besides: that these are places
* to be rather than errands to run. Sessions, the machine's importable history, the models on it
* and the machines themselves are all *the same backend*, looked at four ways, and none is a step
* down from another. Settings still is, which is why it stays a pushed screen with its own Back.
*/
private enum class MainTab(val label: String) {
Sessions("Sessions"),
@@ -61,17 +59,12 @@ fun MainScreen(
//
// What these four draw is a snapshot of a backend they are not connected to, so it is only as
// fresh as the last answer -- and a *failed* answer is the one that outstays its welcome. A
// phone that was away while the tunnel was down, or that fetched before the network came up,
// came back to "Couldn't reach the server" sitting at the top of a list the server would now
// answer for perfectly well, and nothing took it off until somebody pressed Refresh. A stale
// failure is worse than a stale list: it is a claim about right now.
// phone that was away while the tunnel was down came back to "Couldn't reach the server"
// sitting at the top of a list the server would now answer for perfectly well. A stale failure
// is worse than a stale list: it is a claim about right now.
//
// Through the same token the Refresh button uses, so this is one instruction the tabs already
// understand rather than a second path into each of them -- which is also what makes it cover
// all four rather than the one the report came from.
//
// Not on the first entry: the tab composing already asks, and bumping here would make every
// cold start fetch twice.
// understand. Not on the first entry: the tab composing already asks.
val lifecycleOwner = LocalLifecycleOwner.current
LaunchedEffect(lifecycleOwner) {
var opening = true
@@ -81,9 +74,8 @@ fun MainScreen(
}
}
// A tab the app put over the list has to step back to it rather than fall through to the
// system default, which closes the app -- that reads as a crash to somebody who only meant to
// get back to their sessions. Nested inside AppRoot's handler, so it wins while it is enabled.
// A tab the app put over the list has to step back to it rather than fall through to the system
// default, which closes the app. Nested inside AppRoot's handler, so it wins while enabled.
BackHandler(enabled = tab != MainTab.Sessions) { tab = MainTab.Sessions }
Column(Modifier.fillMaxSize()) {
@@ -98,20 +90,18 @@ fun MainScreen(
)
// Glyphs rather than the words they replaced: neither ever changes, both are read
// faster than they are spelled, and together they take the width that let the title
// keep its own line. They sit on the title's row because they act on the whole
// screen -- everything below this row is one tab's business, and a control belongs
// with the thing it acts on.
// Flush against each other: a glyph button carries its own padding, so two of them
// side by side already have two rings between their marks and one ring plus this
// row's padding to the screen edge.
// keep its own line. They sit on the title's row because they act on the whole screen.
//
// Flush against each other: a glyph button carries its own padding, so two side by side
// already have two rings between their marks.
Row {
GlyphButton(REFRESH_GLYPH, "Refresh", { refreshToken++ })
GlyphButton(SETTINGS_GLYPH, "Settings", onSettings)
}
}
// What is waiting to be attached, and what to do about it. Said here because the list
// below is where the choice is made, and a share that arrived with nothing on screen
// saying so would read as a tap that did nothing.
// What is waiting to be attached, and what to do about it. Said here because the list below
// is where the choice is made, and a share that arrived with nothing on screen saying so
// would read as a tap that did nothing.
share?.let {
Text(
it.summary() + " -- open the session it belongs in.",
@@ -127,8 +117,8 @@ fun MainScreen(
.padding(12.dp),
)
}
// Primary rather than the plain TabRow, which is deprecated in favour of the two that
// say where they sit: these are the app's top-level destinations.
// Primary rather than the plain TabRow, which is deprecated in favour of the two that say
// where they sit: these are the app's top-level destinations.
PrimaryTabRow(selectedTabIndex = tab.ordinal) {
MainTab.entries.forEach { entry ->
Tab(
@@ -139,10 +129,9 @@ fun MainScreen(
}
}
// Refreshing means "ask again about what I am looking at", so the button feeds the tab
// that is showing. The token from above means something else already changed what these
// show; the two are the same instruction to the tab below, so they are summed rather than
// tracked apart -- either one moving moves the sum, which is all a tab watches.
// Refreshing means "ask again about what I am looking at", so the button feeds the tab that
// is showing. The token from above means something else already changed what these show;
// the two are the same instruction, so they are summed rather than tracked apart.
val token = reloadToken + refreshToken
when (tab) {
MainTab.Sessions ->
app/androidApp/src/main/kotlin/com/example/aiapp/Markdown.kt
+93 -142
View File
@@ -69,13 +69,10 @@ import org.intellij.markdown.flavours.gfm.GFMTokenTypes
*
* [live] is the reply still arriving, and two things are different for it. Its parse is incremental
* -- see [LiveParse] -- so a delta costs a parse of the block it landed in rather than of the whole
* message. And its pieces get a layer each: when drawing is invalidated, only the piece that
* changed is re-recorded instead of the whole reply, which is worth a great deal while every delta
* invalidates the message and a finished one can be twenty-five screens tall. It is worth nothing
* once the message stops changing -- measured on a Pixel 9 Pro XL, whole rows were re-recorded 65
* times in fifty seconds of reading -- and it is not free: each layer is a layout node and a
* display list held for the life of the row, and live node count is what the per-frame cost of the
* transcript scales with.
* message. And its pieces get a layer each, so only the piece that changed is re-recorded. That is
* worth a great deal while every delta invalidates the message and worth nothing once it stops
* changing -- and it is not free: each layer is a layout node and a display list held for the life
* of the row, and live node count is what the transcript's per-frame cost scales with.
*/
@Composable
fun MarkdownText(
@@ -92,8 +89,8 @@ fun MarkdownText(
var previousSegment: Segment? = null
segments.forEachIndexed { at, segment ->
val nextContinues = segments.getOrNull(at + 1)?.continues == true
// Only the tail is still being written; a frozen segment is finished text that
// happens to sit in a live reply, and it takes its colours now. See [MarkdownRoot].
// Only the tail is still being written; a frozen segment is finished text that happens
// to sit in a live reply, and it takes its colours now.
MarkdownRoot(segment.parse, replies, streaming = live && at == segments.lastIndex) {
segment.pieces.forEachIndexed { index, piece ->
val gap =
@@ -103,9 +100,9 @@ fun MarkdownText(
if (segment.continues) 0.dp else BLOCK_SPACING
else -> gapBefore(previous, piece)
}
// Keyed by where the piece starts in the message rather than by its position
// in this column, so a delta landing in the last block leaves every other
// piece's composition alone -- and a block keeps its key when it freezes.
// Keyed by where the piece starts in the message rather than by its position in
// this column, so a delta landing in the last block leaves every other piece's
// composition alone -- and a block keeps its key when it freezes.
key(segment.start, piece) {
MarkdownPiece(
segment.parse,
@@ -137,8 +134,7 @@ fun MarkdownText(
* A stretch of a message with a parse of its own: the whole of a settled message, or one block, the
* finished items of one list, or the unfinished tail of a live one. [start] is where [text] begins
* in the message. [continues] says the first piece is an item of the list the segment before it
* ended with, so the two draw as one list: no block gap between them, and neither the item above
* the seam nor the one below it takes the padding of a list's edge.
* ended with, so the two draw as one list.
*/
private class Segment(
val text: String,
@@ -154,14 +150,11 @@ private class Segment(
*
* The first parse has to be inline. The renderer's own asynchronous path draws an empty loading
* slot until its result arrives, so a row is measured at nothing before it is measured at its real
* height, and the transcript above it collapses and springs back. Seen with five replies on screen
* at once, every one of them blank, the whole conversation shrunk to fit a single screen; a moment
* later it was all there again. That is the "skipping up and down" this list must never do.
* height, and the transcript above it collapses and springs back -- seen with five replies on
* screen at once, the whole conversation shrunk to fit a single screen.
*
* Every parse after the first is off the composing thread, and the row keeps drawing the parse it
* already has until the new one lands, so there is never a frame without a height. What is on
* screen is always a real prefix of the reply rather than a guess at it; it is simply one parse
* behind.
* already has until the new one lands, so there is never a frame without a height.
*/
@Composable
private fun liveSegments(text: String): List<Segment> {
@@ -187,24 +180,18 @@ private fun liveSegments(text: String): List<Segment> {
* Reparsing the whole message per delta was fine for a short reply and not for a long one: a
* twenty-five-screen reply parses in tens of milliseconds, hundreds of times, and although that ran
* off the composing thread it was every core busy while the frame's own thread waited for one.
* Markdown's blocks make the cut safe: a top-level block that another block has started *after* is
* finished -- nothing appended later can reach back into it, since a paragraph ends at the blank
* line or the block that interrupts it, a fence at its closing fence, a list at the first line that
* is neither an item nor indented under one. So every block but the last is [frozen] with the parse
* that finished it, and only the tail -- the last block and whatever has arrived since -- is parsed
* again.
*
* A list is cut once more, at its last item, by the same reasoning one level down: an item is
* finished once the next item has begun, since a line can only continue the item it is indented
* under or start a new one. Without this a reply that is one long list -- forty sources -- parsed
* the whole list per delta, and a list streams as forty paragraphs would. The item the cut lands on
* has to have begun in earnest: a bare `-` is an empty item now and the first character of a
* paragraph line once `-x` arrives, and cutting on it would draw that line as a new item.
* Markdown's blocks make the cut safe: a top-level block that another block has started *after* is
* finished -- nothing appended later can reach back into it. So every block but the last is
* [frozen] with the parse that finished it, and only the tail is parsed again.
*
* A list is cut once more, at its last item, by the same reasoning one level down. Without this a
* reply that is one long list -- forty sources -- parsed the whole list per delta. The item the cut
* lands on has to have begun in earnest: a bare `-` is an empty item now and the first character of
* a paragraph line once `-x` arrives.
*
* What the cut gives up is one thing: a reference definition arriving later than a link that uses
* it, since the frozen block's parse never sees it. The link draws as its brackets until the reply
* settles and is parsed whole by [warm], which is the same moment every other transient of
* streaming is put right.
* it. The link draws as its brackets until the reply settles and is parsed whole by [warm].
*/
private class LiveParse(
val text: String,
@@ -217,8 +204,8 @@ private class LiveParse(
get() = frozen + tail
fun advanceTo(next: String): LiveParse {
// Anything but an append to what was frozen -- a message replaced, a stream reset --
// starts over.
// Anything but an append to what was frozen -- a message replaced, a stream reset -- starts
// over.
if (!next.regionMatches(0, text, 0, consumed)) return whole(next)
val tailText = next.substring(consumed)
val parse = parseMarkdown(tailText)
@@ -264,8 +251,7 @@ private class LiveParse(
/**
* The piece of the tail still being written: the last item of a list of several, or the first
* piece of the last block when there is more than one block. Null when nothing before it is
* finished, so the tail stays whole.
* piece of the last block when there is more than one. Null when nothing before it is finished.
*/
private fun openPiece(parse: State.Success, all: List<Piece>): Piece? {
val last = all.lastOrNull() ?: return null
@@ -315,28 +301,24 @@ fun MarkdownPiece(
* The renderer's own environment -- its colours, type scale, dimensions, component table and
* reference links -- around whatever draws pieces of [parse].
*
* The parsing is the library's. Markdown is somebody else's specification, and a hand-written
* The parsing is the library's: markdown is somebody else's specification, and a hand-written
* parser would get the edge cases wrong one case at a time. So is the environment: the element
* composables its dispatch reaches read these locals, and providing them once here is what lets a
* piece be drawn anywhere -- in a message's column, or as one item of the transcript list.
* Everything below this is the mapping onto the app's palette and type scale.
*
* The locals are provided directly rather than through the renderer's `Markdown()` composable,
* which was the last of its composables on the hot path and was here only to provide them. What
* that buys is that nothing between a piece and the screen is the library's but the leaf
* composables named in the component table, so a different parser could stand behind [State]
* without the renderer's entry point being involved.
* which was the last of its composables on the hot path and was here only to provide them. So
* nothing between a piece and the screen is the library's but the leaf composables named in the
* component table.
*
* Colours come from the theme rather than from the renderer's defaults, so code, links and rules
* are the same Catppuccin values the rest of the app uses. Nothing here picks a colour of its own.
* Colours come from the theme rather than the renderer's defaults. Nothing here picks one of its
* own.
*
* [streaming] says this parse is the part of a reply still being written, which only the fences
* care about: lexing is proportional to how much code there is, and a fence still arriving is
* re-lexed at every delta on the composing thread. Measured streaming a two-hundred-line Kotlin
* fence: **13.7 seconds** of lexing across the turn, 211 of them, the worst 177ms -- for colours on
* text that was being replaced as fast as they were computed. So a fence still being written is
* drawn plain and takes its colours when the block freezes, which is the same bargain [LiveParse]
* already makes for a reference link defined at the foot of a message.
* care about: lexing is proportional to how much code there is. Measured streaming a two-hundred-
* line Kotlin fence: **13.7 seconds** of lexing across the turn, 211 of them, the worst 177ms --
* for colours on text being replaced as fast as they were computed. So a fence still being written
* is drawn plain and takes its colours when the block freezes.
*/
@Composable
private fun MarkdownRoot(
@@ -354,45 +336,40 @@ private fun MarkdownRoot(
CompositionLocalProvider(
LocalReferenceLinkHandler provides parse.referenceLinkHandler,
LocalMarkdownPadding provides markdownPadding(),
// Read by the renderer's own text composable, which no paragraph reaches any more, and
// by its checkbox. Provided so a path that does reach them draws no image rather than
// failing to compose.
// Read by the renderer's own text composable, which no paragraph reaches any more, and by
// its checkbox. Provided so a path that does reach them draws no image rather than failing
// to compose.
LocalImageTransformer provides remember { NoOpImageTransformerImpl() },
LocalMarkdownAnimations provides markdownAnimations(),
LocalMarkdownColors provides
markdownColor(
text = MaterialTheme.colorScheme.onSurface,
dividerColor = MaterialTheme.colorScheme.outlineVariant,
// The dark surface every verbatim thing in this app sits on -- see [rawSurface],
// and the tool call above this reply, which now matches. `surfaceVariant` was
// exactly a card's own fill, so a fenced block inside a tool call had no
// background at all and one in a reply read as a step *up* out of the page.
// The dark surface every verbatim thing in this app sits on -- and the tool call
// above this reply, which now matches. `surfaceVariant` was exactly a card's own
// fill, so a fenced block inside a tool call had no background at all.
codeBackground = rawSurface,
// The same colour. Not drawn by the renderer as a span background but by
// [LinkedText] behind the text, so a selection lands on top of it as it does on a
// fenced block -- see `appendCodeChip`.
// [LinkedText] behind the text, so a selection lands on top of it -- see
// `appendCodeChip`.
inlineCodeBackground = rawSurface,
// The same tint a code block gets, rather than the renderer's 2%-alpha default:
// two adjacent tints that differ by a fiftieth read as one flat block on a phone,
// so the table would have had a border-less grid and nothing saying where it began.
// The same tint a code block gets, rather than the renderer's 2%-alpha default: two
// adjacent tints that differ by a fiftieth read as one flat block on a phone.
tableBackground = MaterialTheme.colorScheme.surfaceVariant,
),
LocalMarkdownTypography provides
markdownTypography(
// A ladder that starts near the body text and descends, because these are headings
// inside a chat message rather than the top of a document. The renderer's defaults
// are the Material *display* styles -- `#` came out at 57sp and `##` at 45sp, which
// is bigger than this app's own screen titles and reads as the reply shouting.
//
// Every step is a different size, so two levels of nesting never draw the same:
// one clear step per level is the whole job of a heading.
// are the Material *display* styles -- `#` came out at 57sp, bigger than this app's
// own screen titles. Every step is a different size, so two levels of nesting never
// draw the same.
h1 = MaterialTheme.typography.headlineSmall,
h2 = MaterialTheme.typography.titleLarge,
h3 = MaterialTheme.typography.titleMedium,
h4 = MaterialTheme.typography.titleSmall,
h5 = MaterialTheme.typography.labelMedium,
h6 = MaterialTheme.typography.labelSmall,
// Body text at the size everything else in the transcript uses.
text = body,
paragraph = body,
ordered = body,
@@ -400,16 +377,10 @@ private fun MarkdownRoot(
list = body,
table = body,
// Code in a monospace face, in the ordinary text colour. The face and the tinted
// background are what say "this is code"; colour is not, and it used to be green
// -- the palette's colour for a *literal*. A block of code is not a literal, it
// is text that happens to be code, and painting all of it green said the whole
// block was one. Where a literal really does appear inside code, the thing that
// should colour it is a syntax highlighter looking at the code, which is exactly
// what a tool call's input already gets from `catppuccinSyntax`.
//
// The colour rides on the style here rather than in `markdownColor`, which
// stopped carrying `codeText`/`inlineCodeText`/`linkText` when the renderer moved
// them onto the typography.
// background are what say "this is code"; colour is not, and it used to be green --
// the palette's colour for a *literal*. A block of code is not a literal, and
// painting all of it green said the whole block was one. Where a literal really
// does appear inside code, what should colour it is a syntax highlighter.
code =
MaterialTheme.typography.bodyMedium.copy(
fontFamily = FontFamily.Monospace,
@@ -436,31 +407,26 @@ private fun MarkdownRoot(
LocalMarkdownDimens provides
markdownDimens(
// Half the renderer's 16dp. Padding is charged on both sides of every cell, so at
// the default a fifth of the narrowest column went on space rather than on words
// -- and the narrowest column is where the wrapping below has the least room.
// the default a fifth of the narrowest column went on space rather than on words.
tableCellPadding = 8.dp,
// What a column narrows to before the table starts scrolling sideways instead. It
// is the floor, not the width: a table with room to spare spreads across it.
//
// Down from the renderer's 160dp, and the number is a measurement rather than a
// taste. A phone is about 410-450dp wide and a card takes some of that, so 160dp
// makes even a three-column table -- the commonest shape there is -- scroll, while
// 136dp fits three across the phone this app is read on. Four and up still scroll,
// which is the right answer for genuinely too many columns: squeezing six columns
// into a phone would give every cell one word per line.
//
// Narrower would fit more, and stop being readable. This is the widest minimum
// that keeps three columns on screen, which is the trade the number is making.
// makes even a three-column table scroll, while 136dp fits three across the phone
// this app is read on. Four and up still scroll, which is the right answer for
// genuinely too many columns. This is the widest minimum that keeps three on
// screen.
tableCellWidth = 136.dp,
),
LocalMarkdownComponents provides
markdownComponents(
// The m3 renderer's own default, restored: supplying `components` at all replaces
// the whole set, and this is the only member of it the Material layer overrides.
// the whole set, and this is the only member the Material layer overrides.
checkbox = { MarkdownCheckBox(it.content, it.node, it.typography.text) },
// Everything that draws a run of text, so a link is a span rather than a node --
// see [LinkedText]. Setext headings take the same styles as `#` and `##`, which
// is the renderer's own pairing.
// see [LinkedText]. Setext headings take the same styles as `#` and `##`.
text = { LinkedText(it, it.typography.text) },
paragraph = { LinkedText(it, it.typography.paragraph) },
heading1 = { LinkedHeading(it, it.typography.h1) },
@@ -471,8 +437,8 @@ private fun MarkdownRoot(
heading6 = { LinkedHeading(it, it.typography.h6) },
setextHeading1 = { LinkedHeading(it, it.typography.h1) },
setextHeading2 = { LinkedHeading(it, it.typography.h2) },
// Lists are ours wherever the renderer's dispatch meets one -- inside a quote --
// so they draw like the top-level ones the transcript cuts into items.
// Lists are ours wherever the renderer's dispatch meets one -- inside a quote -- so
// they draw like the top-level ones the transcript cuts into items.
orderedList = { MarkdownList(it.content, it.node, it.listDepth) },
unorderedList = { MarkdownList(it.content, it.node, it.listDepth) },
table = { LinkedTable(it.content, it.node, it.typography.table) },
@@ -491,14 +457,12 @@ private fun MarkdownRoot(
/**
* A table: its rows, on the renderer's tinted, rounded background, as wide as its columns need.
*
* Each column has a floor ([markdownDimens]'s `tableCellWidth`), so the table is at least
* columns-times-floor wide; narrower than the room it has, it spreads to fill it, and wider, it
* scrolls sideways rather than squeezing. The renderer decided that with a `BoxWithConstraints`,
* which is a subcomposition; here it is one layout modifier, and the trick is where it sits.
* `fillMaxWidth` fixes the minimum width to the room available, the horizontal scroll passes that
* minimum through to its content while lifting the maximum to unbounded, and the modifier after it
* reads the minimum back as the room and sizes the rows to the larger of that and the floor. The
* scroll then has exactly the overflow to scroll, which is none when the table fits.
* Each column has a floor, so the table is at least columns-times-floor wide; narrower than the
* room it has, it spreads to fill it, and wider, it scrolls sideways rather than squeezing. The
* renderer decided that with a `BoxWithConstraints`, which is a subcomposition; here it is one
* layout modifier. `fillMaxWidth` fixes the minimum width to the room available, the horizontal
* scroll passes that minimum through while lifting the maximum to unbounded, and the modifier after
* it reads the minimum back and sizes the rows to the larger of that and the floor.
*/
@Composable
private fun LinkedTable(content: String, node: ASTNode, style: TextStyle) {
@@ -539,19 +503,15 @@ private fun LinkedTable(content: String, node: ASTNode, style: TextStyle) {
* One row of a table -- the header when [rowIndex] is zero -- with every cell a [LinkedText].
*
* The renderer's own rows draw each cell at `maxLines = 1` with an ellipsis, which on a phone means
* most of a table is simply not readable: anything past about twenty characters ends in "..." with
* no way to see the rest, and an elided cell looks like a short one, so a table of measurements
* reads as a table of plausible shorter measurements. And they draw a link in a cell as its own
* layout node, the cost [LinkedText] exists to avoid.
* most of a table is simply not readable: an elided cell looks like a short one, so a table of
* measurements reads as a table of plausible shorter measurements. And they draw a link in a cell
* as its own layout node, the cost [LinkedText] exists to avoid.
*
* So: as many lines as the cell needs, cells aligned to the top of the row, because a two-line cell
* beside a one-line one centred the short one against the middle of the tall one and lost the line
* the reader was reading across. What the wrapping does *not* do is make a wide table fit;
* [LinkedTable] scrolls it instead, which is the right answer for too many columns -- wrapping a
* six-column table into the width of a phone would give every cell one word per line.
* beside a one-line one centred the short one against the middle of the tall one. What the wrapping
* does *not* do is make a wide table fit; [LinkedTable] scrolls it instead.
*
* The semantics are the renderer's: each cell is an item of the table's collection, and a header
* cell is a heading.
* The semantics are the renderer's: each cell is an item of the table's collection.
*/
@Composable
private fun LinkedTableRow(content: String, row: ASTNode, style: TextStyle, rowIndex: Int) {
@@ -587,19 +547,14 @@ private fun LinkedTableRow(content: String, row: ASTNode, style: TextStyle, rowI
* Parsing is the expensive half of drawing a reply, and it is expensive in proportion to how much
* was written. Measured against a real Claude Code transcript on the emulator, one message took
* **51ms** and several took 10-25ms, against 4.6ms for the short synthetic replies this was first
* tuned on -- so a page of history landing composed several rows that each stalled the frame they
* appeared in. That is the lag when a block loads.
* tuned on -- so a page of history landing composed several rows that each stalled the frame.
*
* Nothing here changes what a row does when it has no answer waiting: it parses inline, on the
* composing thread, because a row measured at nothing before it is measured at its real height
* collapses the transcript above it. The point is only that by the time the reader scrolls to a
* row, the answer is usually already made -- [warm] runs on a background thread as each page of
* history arrives, which is seconds before anybody reaches the rows it brought.
* Nothing here changes what a row does when it has no answer waiting: it parses inline, because a
* row measured at nothing before its real height collapses the transcript above it. The point is
* only that by the time the reader scrolls to a row, the answer is usually already made.
*
* A miss is not stored, and that is what bounds this: the map holds one entry per message a page
* warmed and nothing else, so a reply still streaming cannot fill it with hundreds of copies of
* itself on the way to being finished. It is dropped with the screen, and emptied by the stream
* reset that drops the rows it describes.
* warmed, so a reply still streaming cannot fill it with hundreds of copies of itself.
*/
@Stable
class ParsedReplies {
@@ -607,14 +562,13 @@ class ParsedReplies {
/**
* How each message divides into pieces, cached beside its parse: [transcriptUnits] asks per
* fold, and walking the tree again each time is proportional to the message where a lookup is
* proportional to nothing.
* fold, and walking the tree again each time is proportional to the message.
*/
private val pieces = ConcurrentHashMap<String, List<Piece>>()
/**
* How each message divides into prose and memory notes, cached for the same reason as
* [piecesOf]: the regex scan behind [messageParts] is proportional to the message.
* How each message divides into prose and memory notes, cached for the same reason: the regex
* scan behind [messageParts] is proportional to the message.
*/
private val parts = ConcurrentHashMap<String, List<MessagePart>>()
@@ -627,7 +581,7 @@ class ParsedReplies {
* much code was written -- a two-hundred-line Kotlin fence measured 174ms on the emulator --
* and a lazy list drops the composition of a block that scrolls away, so a `remember` inside
* the fence paid that again every time the reader came back to it. Six times in one scroll,
* measured. [warm] fills this off the drawing thread before the row is reached.
* measured.
*/
private val highlights = ConcurrentHashMap<String, AnnotatedString>()
@@ -649,11 +603,10 @@ class ParsedReplies {
* Whether [warm] has made everything drawing [text] as pieces will look up.
*
* What the flatten asks before drawing a reply that way. Cutting costs a parse of the whole
* message and the flatten runs on the composing thread -- so a reply not marked yet stays
* whole, drawing the parse it already has, until the screen has warmed it and re-flattens. An
* explicit mark rather than a peek into the parse cache, because a message with memory notes is
* warmed as its *parts*: nothing ever parses its full text, and inferring readiness from the
* cache left exactly that message unsplittable forever, re-warmed on every fold.
* message and the flatten runs on the composing thread, so a reply not marked yet stays whole
* until the screen has warmed it. An explicit mark rather than a peek into the parse cache,
* because a message with memory notes is warmed as its *parts*: nothing ever parses its full
* text, and inferring readiness from the cache left exactly that message unsplittable forever.
*/
fun splitReady(text: String): Boolean = text in ready
@@ -668,9 +621,8 @@ class ParsedReplies {
}
/**
* [code] coloured for [language] -- the answer made ahead, or one made now.
*
* The key carries the language, because the same code lexes differently under two of them.
* [code] coloured for [language] -- the answer made ahead, or one made now. The key carries the
* language, because the same code lexes differently under two of them.
*/
fun highlighted(code: String, language: Language?): AnnotatedString =
if (language == null) AnnotatedString(code)
@@ -686,9 +638,9 @@ class ParsedReplies {
*
* Suspending, and yielding between messages, because "off the composing thread" is not the same
* as "free". A page of history arrives as hundreds of parses at once -- 1.5 seconds of them in
* a twelve second scroll, measured on a Pixel 9 Pro XL -- and on the default dispatcher that is
* every core busy, with the frame's own thread waiting for one. That showed up as 21ms of
* `waited` at the 90th percentile: the frame could not start, rather than taking too long.
* a twelve second scroll on a Pixel 9 Pro XL -- and on the default dispatcher that is every
* core busy, with the frame's own thread waiting for one: 21ms of `waited` at the 90th
* percentile.
*/
suspend fun warm(texts: List<String>) {
texts.forEach { text ->
@@ -697,9 +649,8 @@ class ParsedReplies {
DebugStats.timed("markdown warmed") { parseMarkdown(it) }
}
// The fences too, and here rather than in a pass of its own: they are found in the
// parse this just made, and lexing one is the same kind of cost as parsing the
// message it is in -- proportional to what was written, and charged to the frame
// that first draws it if nobody paid it earlier.
// parse this just made, and lexing one is the same kind of cost as parsing the message
// it is in.
fences(parse).forEach { (code, language) -> highlighted(code, language) }
}
}
app/androidApp/src/main/kotlin/com/example/aiapp/MarkdownLinks.kt
+30 -42
View File
@@ -44,27 +44,22 @@ import org.intellij.markdown.flavours.gfm.GFMTokenTypes
*
* Compose turns every `LinkAnnotation` in a text into a layout node: a clipped, focusable,
* hoverable, clickable box laid out against the glyphs, with its outline recomputed from the text
* layout. A paragraph of eight links is therefore nine nodes, and the renderer emits one of those
* annotations per link. Measured on the emulator against the same paragraphs with each link
* replaced by its label and address as plain words -- *more* text, the same gestures -- the linked
* version cost five times the worst measure (26.3ms against 5.2ms) and 1.7x the place time. On a
* Pixel 9 Pro XL that was the bump at the list of sources in a reply, and nowhere else in it.
* layout. A paragraph of eight links is therefore nine nodes, and the renderer emits one annotation
* per link. Measured on the emulator against the same paragraphs with each link replaced by its
* label and address as plain words -- *more* text, the same gestures -- the linked version cost
* five times the worst measure (26.3ms against 5.2ms) and 1.7x the place time.
*
* Here a link is the link colour and underline, a string annotation carrying its address, and one
* tap detector for the whole text that asks the layout which character was under the finger. What
* that gives up is a link being its own accessibility node with a pressed state; the app's link
* style never defined a pressed style, so nothing visible changes.
*
* Every block the renderer dispatches through its component table comes here, which includes the
* paragraphs inside lists, quotes and alerts, and so does every table cell through
* [LinkedTableRow]. Reference-style links are the one kind still drawn the renderer's way; it
* resolves those against its definitions.
* Every block the renderer dispatches through its component table comes here, and so does every
* table cell. Reference-style links are the one kind still drawn the renderer's way.
*
* An image is a link too, carrying its alt text. The app has no image loader and the renderer's
* transformer was the no-op one, so an image in a reply drew as nothing at all -- a hole where the
* model put something, with no sign of what fell out. The link says what was there and where, and
* opens it. It also means no paragraph needs the renderer's own text composable, which existed to
* place inline images and charged every paragraph for the possibility.
* model put something. The link says what was there and where, and opens it.
*/
@Composable
fun LinkedText(model: MarkdownComponentModel, style: TextStyle) {
@@ -74,8 +69,7 @@ fun LinkedText(model: MarkdownComponentModel, style: TextStyle) {
/**
* A heading. Its words are a child of the heading node -- `ATX_CONTENT` after the `#`s, or
* `SETEXT_CONTENT` above the underline -- and the inline builder draws nothing for a node type it
* does not know, so handed the heading node itself it draws an empty line. Which is what this did
* for a week.
* does not know, so handed the heading node itself it draws an empty line.
*/
@Composable
fun LinkedHeading(model: MarkdownComponentModel, style: TextStyle) {
@@ -113,18 +107,18 @@ fun LinkedText(content: String, node: ASTNode, style: TextStyle, modifier: Modif
BasicText(
text = text,
modifier =
// A tap here is either a link or the card's; see [LocalMarkdownTap] for why the
// second one has to be answered from inside the text rather than left to the card.
// A tap here is either a link or the card's; see [LocalMarkdownTap] for why the second
// one has to be answered from inside the text rather than left to the card.
modifier.then(chipFill).pointerInput(text, onPlainTap) {
awaitEachGesture {
// Unconsumed is not required: something outside may already be tracking this
// press, and it is still the press that may land on a link.
awaitFirstDown(requireUnconsumed = false)
// A tap and nothing else. Null when the gesture became something somebody
// else's -- a scroll, or a press held past the long-press timeout, which is
// how a selection starts. The timeout is the load-bearing half: without it a
// press held for a second and released was still an up with nothing consumed,
// so holding a peer message to select from it shut the card instead.
// A tap and nothing else. Null when the gesture became somebody else's -- a
// scroll, or a press held past the long-press timeout, which is how a selection
// starts. The timeout is the load-bearing half: without it a press held for a
// second and released was still an up with nothing consumed, so holding a peer
// message to select from it shut the card instead.
val up =
withTimeoutOrNull(viewConfiguration.longPressTimeoutMillis) {
waitForUpOrCancellation()
@@ -156,27 +150,24 @@ fun LinkedText(content: String, node: ASTNode, style: TextStyle, modifier: Modif
* usually -- or null where a plain tap means nothing.
*
* A composition local because there is nowhere else to put it. The paragraphs of a message are
* composed by the renderer's own dispatch out of its component table, so nothing between a card and
* the text inside it is ours to pass a parameter through; the renderer already hands its colours,
* its typography and its components down the same way.
* composed by the renderer's own dispatch, so nothing between a card and the text inside it is ours
* to pass a parameter through.
*
* It exists because a pointer-input node over the glyphs takes the tap and the card's own click
* handler never sees it. Measured on the emulator against an opened peer message: with a handler on
* the text -- consuming or not -- a tap on its words did nothing at all, and with the handler
* removed entirely the same tap shut the card. So a card whose body is markdown cannot be shut by
* pressing its words unless the words do the shutting, and "nothing happens when I press it" is
* indistinguishable from a card that has stopped working.
* handler never sees it. Measured against an opened peer message: with a handler on the text --
* consuming or not -- a tap on its words did nothing at all, and with the handler removed the same
* tap shut the card. So a card whose body is markdown cannot be shut by pressing its words unless
* the words do the shutting.
*
* Provided as a value that outlives a recomposition (see [rememberMarkdownTap]), since a fresh
* lambda per composition would invalidate every paragraph reading it.
* Provided as a value that outlives a recomposition, since a fresh lambda per composition would
* invalidate every paragraph reading it.
*/
val LocalMarkdownTap = compositionLocalOf<(() -> Unit)?> { null }
/**
* [onTap] as a stable value to provide for [LocalMarkdownTap].
*
* The identity stays put while the behaviour follows the latest [onTap], which is what keeps
* providing it from invalidating the text under it on every recomposition of the card.
* [onTap] as a stable value to provide for [LocalMarkdownTap]. The identity stays put while the
* behaviour follows the latest [onTap], which is what keeps providing it from invalidating the text
* under it on every recomposition of the card.
*/
@Composable
fun rememberMarkdownTap(onTap: () -> Unit): () -> Unit {
@@ -212,9 +203,8 @@ private const val LINK_URL = "url"
* The chip's fill is drawn by [LinkedText] from the layout instead, behind the text. A span's
* background is part of the text's own drawing, and the text node draws the selection first and the
* glyphs over it, so a chip painted as a span background covered the selection: selecting a
* sentence highlighted every word of it except the ones in backticks. Anything drawn by a modifier
* on the text is under both, which is where a fenced block's box already is and why one of those
* always looked right. The [CODE_CHIP] annotation is what says where the fill goes.
* sentence highlighted every word except the ones in backticks. Anything drawn by a modifier on the
* text is under both, which is where a fenced block's box already is.
*/
private fun appendCodeChip(
builder: AnnotatedString.Builder,
@@ -242,13 +232,11 @@ private const val CODE_CHIP = "code"
* Not `getPathForRange`, which is the geometry of a *selection* and runs to the right edge of every
* line but the last, so a chip whose code wrapped left a full-width empty box behind on the line
* above. Each line is taken as far as `visibleEnd`, which is where that line's own trailing space
* stops being drawn: the same rule the selection rectangle obeys, so the two agree rather than the
* chip sticking a space out past the end of a selected line. It is also what leaves nothing behind
* when the only thing to reach a line is the space a chip is padded with.
* stops being drawn -- the same rule the selection rectangle obeys, so the two agree.
*
* A run's extent is taken from the boxes of its first and last characters, which is exact while a
* line reads in one direction; mixed directions inside a code span would draw one box across the
* whole run rather than one per direction, and code spans are code.
* whole run, and code spans are code.
*/
private fun TextLayoutResult.chipRects(start: Int, end: Int): List<Rect> {
val rects = mutableListOf<Rect>()
app/androidApp/src/main/kotlin/com/example/aiapp/MarkdownPieces.kt
+25 -34
View File
@@ -34,22 +34,18 @@ import org.intellij.markdown.flavours.gfm.GFMTokenTypes
*
* The point is the draw phase and the lazy list. A reply's display list holds every glyph of it and
* is re-recorded whenever drawing is invalidated, so one long message costs as much to draw as a
* hundred short ones; and the list composes an item whole in the frame it scrolls into, so an item
* has to be bounded for the worst frame to be. Measured on a Pixel 9 Pro XL, the tallest row still
* being drawn was 36,982px, twenty-five screens in one message. A piece is a paragraph, a fence, a
* table, one bullet: bounded, so both costs are.
* hundred short ones; and the list composes an item whole in the frame it scrolls into. Measured on
* a Pixel 9 Pro XL, the tallest row still being drawn was 36,982px -- twenty-five screens in one
* message. A piece is a paragraph, a fence, a table, one bullet: bounded, so both costs are.
*
* Cut where the parser says the blocks are, which is the whole reason this is safe: a fence, a
* table and a nested list are each one node whatever is inside them, so nothing is ever split down
* the middle. A list is the one block that is not bounded -- a reply's list of sources can be forty
* items -- so it is cut once more, into its items, and a nested list stays inside the item that
* holds it.
* Cut where the parser says the blocks are, which is what makes it safe: a fence, a table and a
* nested list are each one node whatever is inside them. A list is the one block that is not
* bounded -- a reply's list of sources can be forty items -- so it is cut once more, into its
* items.
*
* A piece is an *address* into the message's one parse ([block] indexes the root's children, [item]
* the list items of that child) rather than a substring of the message. Every piece of a message is
* drawn from the same tree, so a message is parsed once however many pieces it is drawn as, and a
* reference definition at its foot still resolves the links above it -- the two costs of cutting a
* message into strings and parsing each on its own.
* A piece is an *address* into the message's one parse rather than a substring of it. Every piece
* is drawn from the same tree, so a message is parsed once however many pieces it is drawn as, and
* a reference definition at its foot still resolves the links above it.
*/
@Immutable
data class Piece(val block: Int, val item: Int = WHOLE_BLOCK) {
@@ -59,8 +55,7 @@ data class Piece(val block: Int, val item: Int = WHOLE_BLOCK) {
}
/**
* The pieces of [parse], in reading order. Blank nodes between blocks -- the parser keeps the
* newlines -- are not pieces.
* The pieces of [parse], in reading order. Blank nodes between blocks are not pieces.
*
* A parse that failed yields one piece, so [MarkdownPiece] can still say what the message was: a
* message that drew as nothing would be a hole in the transcript with no sign of what fell out.
@@ -90,17 +85,15 @@ fun gapBefore(previous: Piece?, piece: Piece): Dp =
val BLOCK_SPACING: Dp = 6.dp
/**
* [piece] of [parse], drawn. Must be inside [MarkdownRoot] for the parse, which is what carries the
* theme, the components and the reference links to the renderer's element composables.
* [piece] of [parse], drawn. Must be inside [MarkdownRoot] for the parse, which carries the theme,
* the components and the reference links to the renderer's element composables.
*
* A whole block goes to the renderer's own dispatch with this app's component table, so a paragraph
* or heading is a [LinkedText], a table is [LinkedTableRow]s, and a nested list comes back here
* through [MarkdownList]. Only the list item is drawn directly, because a list item is the one
* piece the renderer has no element for.
* A whole block goes to the renderer's own dispatch with this app's component table. Only the list
* item is drawn directly, because a list item is the one piece the renderer has no element for.
*
* [continuesList] and [listContinues] are for a list cut across the segments of a live reply (see
* `LiveParse`): an item that is the first or last of its own parse but not of the list the reader
* sees keeps an inner item's padding, so nothing moves when the seam between segments does.
* [continuesList] and [listContinues] are for a list cut across the segments of a live reply: an
* item that is the first or last of its own parse but not of the list the reader sees keeps an
* inner item's padding, so nothing moves when the seam between segments does.
*/
@Composable
fun MarkdownPiece(
@@ -112,8 +105,8 @@ fun MarkdownPiece(
listContinues: Boolean = false,
) {
if (parse !is State.Success) {
// The parser threw. Nothing else in the app has seen this happen; if it does, the words
// are still worth more than a blank.
// The parser threw. Nothing else in the app has seen this happen; if it does, the words are
// still worth more than a blank.
Text(text, modifier, style = MaterialTheme.typography.bodyLarge)
return
}
@@ -144,8 +137,7 @@ fun MarkdownPiece(
/**
* A whole list, for the places the renderer's dispatch reaches one it cannot hand to a piece: a
* list inside a quote, and the nested lists an item holds. Top-level lists never come here; they
* are drawn an item at a time as pieces.
* list inside a quote, and the nested lists an item holds. Top-level lists never come here.
*/
@Composable
fun MarkdownList(content: String, list: ASTNode, depth: Int, modifier: Modifier = Modifier) {
@@ -170,9 +162,8 @@ fun MarkdownList(content: String, list: ASTNode, depth: Int, modifier: Modifier
* list drawn as pieces looks exactly like one drawn whole. The list's own padding goes on its first
* and last items, since there is no list column to carry it.
*
* The marker is the renderer's bullet and number, and a checkbox for a task item. It is drawn here
* rather than by a handler because it is the thing a reader might one day want styled -- a
* different glyph per depth, a colour -- and this is the one place it is drawn.
* The marker is drawn here rather than by a handler because it is the thing a reader might one day
* want styled -- a different glyph per depth, a colour -- and this is the one place it is drawn.
*/
@Composable
private fun MarkdownListItem(
@@ -231,8 +222,8 @@ private fun Marker(text: String, style: TextStyle) {
/**
* The bullet at each depth, cycling past the third: a disc, a ring, a square -- the ladder a
* browser draws, so a nested list is told from its parent by the glyph as well as by the indent.
* Checked on the emulator's system fonts, which is what makes them safe to rely on; a glyph the
* platform lacks draws as a box, and that check is the price of adding one here.
* Checked on the emulator's system fonts; a glyph the platform lacks draws as a box, and that check
* is the price of adding one here.
*/
private val BULLETS = listOf("• ", "◦ ", "▪ ")
app/androidApp/src/main/kotlin/com/example/aiapp/MarkdownSyntax.kt
+42 -55
View File
@@ -7,23 +7,19 @@ package com.example.aiapp
* Its own scanner rather than a row of [Rules] because markdown has neither keywords nor strings:
* what a character means depends on where it sits. A `#` opens a heading at the start of a line and
* is an ordinary character three words in; a `*` opens emphasis only if something closes it on the
* same line. The token scanner cannot ask either question, and answering them with its rules is how
* a highlighter comes to grey out the second half of a paragraph.
* same line. The token scanner cannot ask either question.
*
* Structure is read a line at a time and each line's prose is then read left to right, so every
* decision is made inside one line -- except the two things that are not one line. A fenced block
* is state carried forward, so an unclosed fence colours the rest of the text, which is also what
* it looks like while somebody is still writing it. A table is found by its delimiter row
* (`|---|---|`), which is the only line of one that cannot be anything else, and its header is the
* line before that -- the one place here that looks ahead.
* Structure is read a line at a time and each line's prose left to right, so every decision is made
* inside one line -- except the two that are not. A fenced block is state carried forward, so an
* unclosed fence colours the rest of the text, which is what it looks like while somebody is
* writing it. A table is found by its delimiter row (`|---|---|`), the only line of one that cannot
* be anything else, and its header is the line before that -- the one place here that looks ahead.
*
* What is deliberately *not* recognised: an indented code block. Four spaces after a blank line is
* one, and four spaces after a bullet is a list item's second paragraph, and the two are told apart
* by what came before rather than by the line itself. Colouring the wrong one of those as code is a
* mistake the reader cannot see, so both are left plain, which is the safe answer.
* one, four spaces after a bullet is a list item's second paragraph, and the two are told apart by
* what came before. Colouring the wrong one as code is a mistake the reader cannot see.
*
* Like [scan], the spans come out ordered, non-overlapping and inside the text by construction:
* every one is emitted by a pass that only moves forward, and nothing here throws.
* Like [scan], the spans come out ordered, non-overlapping and inside the text by construction.
*/
fun scanMarkdown(code: String): List<Span> = MarkdownScanner(code).run()
@@ -36,7 +32,7 @@ private const val RULE_MARKERS = "-*_="
/** The characters that can open emphasis, strong emphasis or a strikethrough. */
private const val EMPHASIS = "*_~"
/** Characters that end a bare URL wherever they appear in it, and ones only trimmed off the end. */
/** Characters that end a bare URL wherever they appear, and ones only trimmed off the end. */
private const val URL_STOPS = "<>\"'`|"
private const val URL_TRAILING = ".,:;!?"
@@ -53,8 +49,8 @@ private class MarkdownScanner(private val code: String) {
val end = lineEnd(at)
val open = fence
if (open != null) {
// The content and the closing line alike: a fence is one block of code, and its
// own delimiters belong to it the way a string's quotes belong to the string.
// The content and the closing line alike: a fence is one block of code, and its own
// delimiters belong to it the way a string's quotes belong to the string.
emit(at, end, Kind.STRING)
if (closesFence(at, end, open)) fence = null
} else {
@@ -77,11 +73,10 @@ private class MarkdownScanner(private val code: String) {
/**
* One line that is not inside a fence, and whether the table it may be part of is still open.
*
* A table is recognised by its delimiter row (`|---|---|`), which is the only line of one that
* cannot be anything else. That row comes *after* the header it belongs to, so the header is
* found by looking one line ahead -- the single piece of lookahead here, and cheaper than the
* alternative of colouring every `|` in the document, which would mark the pipes in a shell
* command written in a paragraph.
* A table is recognised by its delimiter row, the only line of one that cannot be anything
* else. That row comes *after* the header it belongs to, so the header is found by looking one
* line ahead -- the single piece of lookahead here, and cheaper than colouring every `|` in the
* document, which would mark the pipes in a shell command written in a paragraph.
*/
private fun row(start: Int, end: Int, table: Boolean): Boolean {
if (tableDelimiter(start, end)) {
@@ -142,10 +137,9 @@ private class MarkdownScanner(private val code: String) {
}
/**
* Spans, coalesced with the one before when they touch and agree.
*
* Worth doing here rather than leaving it to the caller: the line scanner emits per marker and
* per word, so a heading would otherwise arrive as a dozen abutting spans of one colour.
* Spans, coalesced with the one before when they touch and agree. Worth doing here rather than
* leaving it to the caller: the line scanner emits per marker and per word, so a heading would
* otherwise arrive as a dozen abutting spans of one colour.
*/
private fun emit(start: Int, end: Int, kind: Kind) {
if (end <= start) return
@@ -179,17 +173,16 @@ private class MarkdownScanner(private val code: String) {
private fun opensFence(start: Int, end: Int): String? {
val run = fenceRun(start, end) ?: return null
emit(run.first, run.last + 1, Kind.STRING)
// The info word is what the fence is a fence *of*, which is metadata about the block
// rather than part of it -- the same reading as a Rust attribute above a struct.
// The info word is what the fence is a fence *of*, which is metadata about the block rather
// than part of it.
emit(indented(run.last + 1, end), end, Kind.METADATA)
return code.substring(run.first, run.last + 1)
}
/**
* Whether this line closes a fence opened by [open].
*
* The same character, at least as many of them, and nothing else on the line -- so a longer run
* closes a shorter one and a line of backticks with a word after it does not close anything.
* Whether this line closes a fence opened by [open]: the same character, at least as many of
* them, and nothing else on the line -- so a longer run closes a shorter one and a line of
* backticks with a word after it does not close anything.
*/
private fun closesFence(start: Int, end: Int, open: String): Boolean {
val run = fenceRun(start, end) ?: return false
@@ -227,10 +220,9 @@ private class MarkdownScanner(private val code: String) {
* A line made of one repeated rule character and nothing else.
*
* `---`, `***` and `___` are thematic breaks; `===` and `---` are also the underline of a
* setext heading. The two are the same line to look at and mean the same thing to a reader -- a
* rule drawn across the page -- so they get one appearance rather than a lookback to tell them
* apart. One `=` is enough because a setext underline may be a single character; a break needs
* three, which is what keeps a `- ` bullet out of here.
* setext heading. The two are the same line to look at and mean the same thing to a reader, so
* they get one appearance rather than a lookback. One `=` is enough because a setext underline
* may be a single character; a break needs three, which keeps a `- ` bullet out of here.
*/
private fun thematicBreak(start: Int, end: Int): Boolean {
val marker = code[start]
@@ -292,10 +284,9 @@ private class MarkdownScanner(private val code: String) {
}
/**
* `` `code` ``, closed by a run of exactly as many backticks as opened it.
*
* That count is what lets a span hold a backtick of its own (``` ``a ` b`` ```), and it is why
* the search skips over a shorter or longer run rather than stopping at the first backtick.
* `` `code` ``, closed by a run of exactly as many backticks as opened it. That count is what
* lets a span hold a backtick of its own, and why the search skips over a shorter or longer run
* rather than stopping at the first backtick.
*/
private fun codeSpan(start: Int, end: Int): Int {
var open = start
@@ -323,9 +314,8 @@ private class MarkdownScanner(private val code: String) {
* `[text](destination)`, and the same with a leading `!` for an image.
*
* The text is drawn as prose -- it is what the reader reads -- so only the brackets around it
* are marked, and the destination is metadata: the place the link goes rather than anything
* said to the reader. A `[text]` with no destination after it is left plain, because that is
* what a reference link and a bracketed aside look like, and neither is worth guessing at.
* are marked, and the destination is metadata. A `[text]` with no destination after it is left
* plain, because that is what a reference link and a bracketed aside look like.
*/
private fun link(start: Int, bracket: Int, end: Int): Int {
var depth = 0
@@ -357,8 +347,7 @@ private class MarkdownScanner(private val code: String) {
* `<https://example.com>` and `<name@example.com>`, drawn as the destination they are.
*
* The angle brackets have to hold no whitespace and something that makes an address of it -- a
* scheme's colon or an at sign -- which is what keeps an HTML tag out: `<div>` has neither, and
* `<img src="http://x">` has the colon but also a space.
* scheme's colon or an at sign -- which is what keeps an HTML tag out.
*/
private fun autolink(start: Int, end: Int): Int {
var at = start + 1
@@ -380,13 +369,12 @@ private class MarkdownScanner(private val code: String) {
/**
* A bare `scheme://…` written in prose, or null if one does not start here.
*
* A scheme and `://` rather than a list of them, so `ftp`, `file` and `ssh` need no entry, and
* the pair of colons is what makes the match unambiguous enough to draw without a closer.
* A scheme and `://` rather than a list of them, so `ftp`, `file` and `ssh` need no entry.
*
* Where it ends is the part worth stating: the sentence's punctuation is not the address, so a
* trailing `.` or `,` is given back, and so is a closing bracket unless one opened inside the
* URL -- otherwise a link in parentheses loses its `)` to the address. A pipe stops it too,
* because a URL in a table cell must not swallow the cell's edge.
* URL -- otherwise a link in parentheses loses its `)`. A pipe stops it too, because a URL in a
* table cell must not swallow the cell's edge.
*/
private fun url(start: Int, end: Int): Int? {
if (start > 0 && isWord(code[start - 1])) return null
@@ -415,14 +403,13 @@ private class MarkdownScanner(private val code: String) {
}
/**
* `*emph*`, `**strong**`, `_emph_` and `~~struck~~`, drawn markers and all.
* `*emph*`, `**strong**`, `_emph_` and `~~struck~~`, drawn markers and all -- which is how the
* token scanner draws a string: the quotes are part of the thing.
*
* Markers and all because that is how the token scanner draws a string: the quotes are part of
* the thing. The two guards are what keep this off code that happens to be in a paragraph --
* the opener must be followed by something to emphasise and the closer preceded by something
* emphasised, so `a * b * c` opens nothing and neither does the `*p = *q` of a C fragment.
* Underscores additionally may not start or end inside a word, or every `snake_case_name` in a
* document would be half emphasised.
* The two guards keep this off code that happens to be in a paragraph: the opener must be
* followed by something to emphasise and the closer preceded by something emphasised, so `a * b
* * c` opens nothing and neither does the `*p = *q` of a C fragment. Underscores may not start
* or end inside a word, or every `snake_case_name` would be half emphasised.
*/
private fun emphasis(start: Int, end: Int): Int {
val marker = code[start]
app/androidApp/src/main/kotlin/com/example/aiapp/MemoryNote.kt
+11 -18
View File
@@ -25,12 +25,11 @@ import androidx.compose.ui.unit.dp
* Claude Code marks a sentence that came from its stored memory by wrapping it in `<cc-memory
* filenames="...">`. Markdown has nothing to say about that, so it arrived on screen as literal
* angle brackets in the middle of a sentence -- which reads as the model having emitted broken
* HTML. It is really the opposite: a claim about where something came from, which is worth showing,
* because "I was told this before" and "I worked this out just now" are different things and the
* reader cannot otherwise tell them apart.
* HTML. It is really the opposite: a claim about where something came from, and "I was told this
* before" and "I worked this out just now" are different things the reader cannot otherwise tell
* apart.
*
* A tag that has not finished arriving is left alone. Streaming means the closing tag may be
* seconds away, and a half-written marker is not a marker yet.
* A tag that has not finished arriving is left alone: a half-written marker is not a marker yet.
*/
@Composable
fun AssistantMessage(
@@ -66,12 +65,10 @@ fun AssistantMessage(
* A reply carrying no notes is drawn from the message as it arrived rather than from the trimmed
* prose part made while looking for them -- inspecting a message must not change it. That belongs
* here rather than at the places that need the answer, because [warm] has to name the same strings
* the rows draw: a string warmed under a key no row ever looks up is a miss that nothing reports,
* and the row pays the parse in the frame it appears, which is the cost being removed.
* the rows draw: a string warmed under a key no row ever looks up is a miss nothing reports.
*
* Public because [transcriptUnits] flattens settled replies into the same parts; go through
* [ParsedReplies.partsOf] on any path that runs per fold or per page, so the scan happens once per
* message.
* [ParsedReplies.partsOf] on any path that runs per fold or per page.
*/
fun messageParts(text: String): List<MessagePart> {
val parts = splitMemoryNotes(text)
@@ -83,16 +80,14 @@ fun messageParts(text: String): List<MessagePart> {
*
* Closed by default, like a tool call and a peer message and for the same reason: it is not part of
* what was said to the reader, it is a note about where a claim came from. Left open it breaks the
* reply in half around a card, which reads as the answer having stopped and restarted -- and these
* arrive several to a message.
* reply in half around a card, and these arrive several to a message.
*
* What stays visible is which file it came from, because that is the whole of what the note claims
* and it is the part a reader scanning for "why does it think that" is looking for.
* and the part a reader scanning for "why does it think that" is looking for.
*
* Open-ness is the screen's, keyed by the note's own text: a note opened and scrolled past has to
* still be open on the way back, and a card that remembered for itself would forget the moment the
* list stopped composing it. The text is a good enough name -- it does not change once the closing
* tag has arrived, so a note stays open across the moment its reply settles.
* list stopped composing it.
*/
@Composable
fun MemoryNote(
@@ -148,10 +143,8 @@ private val MEMORY_NOTE =
Regex("""<cc-memory\s+filenames="([^"]*)"\s*>(.*?)</cc-memory>""", RegexOption.DOT_MATCHES_ALL)
/**
* Splits [text] into prose and memory notes, in order.
*
* Always returns at least one part, so a message with no notes in it is one piece of prose and
* costs nothing extra to draw.
* Splits [text] into prose and memory notes, in order. Always returns at least one part, so a
* message with no notes is one piece of prose and costs nothing extra to draw.
*/
fun splitMemoryNotes(text: String): List<MessagePart> {
val parts = mutableListOf<MessagePart>()
app/androidApp/src/main/kotlin/com/example/aiapp/ModelName.kt
+7 -10
View File
@@ -5,26 +5,23 @@ package com.example.aiapp
*
* One constant rather than a literal in each place, because the two have to agree: a picker whose
* options cannot say every state its button can display is one you can leave and not get back to.
* It is also the Claude CLI's own word for "whatever is configured", so choosing it is a request
* the session can act on rather than a name this app made up.
* It is also the Claude CLI's own word for "whatever is configured".
*/
const val DEFAULT_MODEL = "default"
/**
* A model's name as a person reads it.
*
* Providers answer with their own full identifier -- Claude Code resolves `haiku` to
* `claude-haiku-4-5-20251001` and reports that, which is the honest answer to "what is this session
* using" and far too long for a button in a row that also has to hold Stop and Send.
* Providers answer with their own full identifier -- Claude Code resolves `haiku` to `claude-
* haiku-4-5-20251001` and reports that, which is the honest answer to "what is this session using"
* and far too long for a button in a row that also holds Stop and Send.
*
* So the two ends that identify nothing are dropped and nothing else is: the vendor prefix, which
* is the same on every model this app can show, and the release date, which distinguishes builds of
* one model rather than one model from another. What is left is the part somebody chose --
* `haiku-4-5` -- and anything that does not look like that is returned untouched, since a name this
* does not recognise is a name it has no business editing.
* one model rather than one model from another. Anything that does not look like that is returned
* untouched.
*
* A display decision, not a correction: the full name is what the session reports and what a reader
* is shown when there is room for it.
* A display decision, not a correction: the full name is what the session reports.
*/
fun modelLabel(model: String?): String {
val name = model?.takeIf { it.isNotBlank() } ?: return DEFAULT_MODEL
app/androidApp/src/main/kotlin/com/example/aiapp/ModelsScreen.kt
+16 -23
View File
@@ -57,12 +57,9 @@ fun ModelsScreen(settings: ServerSettings, reloadToken: Int) {
}
}
// Polled rather than pushed: a download belongs to the machine, not to
// any session, so it has no event stream of its own. Slow enough not
// to matter, frequent enough that a bar moves.
// Keyed on the token as well, so the header's Refresh restarts the loop with a read now
// rather than leaving the reader watching for up to a second and a half to see whether
// anything happened.
// Polled rather than pushed: a download belongs to the machine, not to any session, so it has
// no event stream of its own. Keyed on the token as well, so the header's Refresh restarts the
// loop with a read now rather than leaving the reader watching for a second and a half.
LaunchedEffect(reloadToken) {
while (true) {
reload()
@@ -186,11 +183,9 @@ fun ModelsScreen(settings: ServerSettings, reloadToken: Int) {
}
}
}
// Inside the expanded repository's own item
// rather than as a section after the list:
// drawn after every card, a repository's files
// read as belonging to whichever card happened
// to be last.
// Inside the expanded repository's own item rather than as a section
// after the list: drawn after every card, a repository's files read as
// belonging to whichever card happened to be last.
if (open) {
when (val files = repoFiles) {
null -> {}
@@ -257,15 +252,15 @@ private fun DownloadCard(download: Download, onCancel: () -> Unit) {
color = MaterialTheme.colorScheme.onSurfaceVariant,
)
Spacer(Modifier.height(8.dp))
// A determinate bar only when the size is known. The server
// sends no total when it was never told one, and a bar drawn
// from a guess is worse than one that admits it is counting.
// A determinate bar only when the size is known. The server sends no total when it was
// never told one, and a bar drawn from a guess is worse than one that admits it is
// counting.
if (download.total != null && download.total > 0) {
LinearProgressIndicator(
progress = { download.done.toFloat() / download.total.toFloat() },
// Blue at every value, unlike a quota bar: a download nearing its end is
// nearing success, and colouring it like a limit being approached would say
// the opposite of what is happening.
// nearing success, and colouring it like a limit being approached would say the
// opposite.
color = progressColor,
modifier = Modifier.fillMaxWidth(),
)
@@ -327,8 +322,8 @@ private fun RepoRow(repo: RemoteRepo, expanded: Boolean, onToggle: () -> Unit) {
repo.id,
style = MaterialTheme.typography.titleSmall,
maxLines = 1,
// The owner is the part that repeats; the model name at
// the end is what tells two entries apart.
// The owner is the part that repeats; the model name at the end is what tells
// two entries apart.
overflow = TextOverflow.StartEllipsis,
)
Text(
@@ -356,11 +351,9 @@ private fun RepoFileRow(file: RemoteFile, downloading: Boolean, onDownload: () -
color = MaterialTheme.colorScheme.onSurfaceVariant,
)
}
// Disabled rather than absent, so the row reads the same whether
// this one is absent, already here, or on its way. Offering
// "Download" for a file that is downloading would be a button that
// does nothing anyone can see -- the server joins the running
// download rather than starting a second.
// Disabled rather than absent, so the row reads the same whether this one is absent,
// already here, or on its way. Offering "Download" for a file that is downloading would be
// a button that does nothing anyone can see.
TextButton(enabled = !file.have && !downloading, onClick = onDownload) {
Text(
when {
app/androidApp/src/main/kotlin/com/example/aiapp/NerdIcons.kt
+35 -53
View File
@@ -26,26 +26,21 @@ import androidx.compose.ui.unit.sp
* set and kept in step by hand.
*
* This replaced a hand-drawn canvas gear, whose doc comment argued against icon fonts on the
* grounds that a system font may not have the glyph and whoever gets the empty box instead is never
* the person who wrote it. That objection is about *relying* on a system font, and it is exactly
* right: the answer is not to avoid glyphs but to ship them. The font here is
* `app/build-icon-font.sh`'s output -- seventeen glyphs, 2.8 KB, subset out of the 3 MB symbols
* font and committed -- so the codepoints below are resolved by an asset in the APK and cannot come
* back as tofu. Adding one means adding its codepoint in *both* places; a codepoint here that the
* script did not subset is a glyph that silently isn't there.
* grounds that a system font may not have the glyph. That objection is about *relying* on a system
* font, and it is exactly right: the answer is not to avoid glyphs but to ship them. The font here
* is `app/build-icon-font.sh`'s output -- seventeen glyphs, 2.8 KB, subset out of the 3 MB symbols
* font and committed. Adding one means adding its codepoint in *both* places; a codepoint here that
* the script did not subset is a glyph that silently isn't there.
*
* The subset is the font's **Mono** face, where every glyph is exactly one em wide and one em tall.
* That is what makes two icons the same size without either of them being given a size: the
* proportional face's advances run from 0.46 em to 0.92 em, so a Send button and a Stop button side
* by side came out visibly different widths, and matching them at the call site would have meant
* one hardcoded measurement per pair. [GLYPH_SIZE] carries the cost.
* That is what makes two icons the same size without either being given a size: the proportional
* face's advances run from 0.46 em to 0.92 em, so a Send button and a Stop button side by side came
* out visibly different widths. [GLYPH_SIZE] carries the cost.
*
* The same arrangement as dev-updater, down to the cog and the refresh arrow being the same two
* Material Design codepoints. Those two must not drift: an icon that means "settings" in one app
* and something else in the other is the failure this is worth preventing. The script is copied
* rather than shared because most of what looks like duplication is the `GLYPHS` list, which has to
* differ -- the point of subsetting is to ship only the codepoints one app draws. All Material
* Design bar one, so they read as one family; the exception is noted where it is declared.
* Material Design codepoints. Those two must not drift. The script is copied rather than shared
* because most of what looks like duplication is the `GLYPHS` list, which has to differ -- the
* point of subsetting is to ship only the codepoints one app draws.
*/
val NerdIcons = FontFamily(Font(R.font.nerd_icons))
@@ -74,8 +69,7 @@ val STOP_GLYPH = glyph(0xF04DB)
*
* The pair with [STOP_GLYPH] and [PLAY_GLYPH] is the point: one button in the composer says what
* pressing it now would do to the process, and the three marks are the three answers. An interrupt
* ends a turn and nothing else -- the CLI is still there and still holds the conversation -- which
* is a pause, not a stop, and drawing it as a square said otherwise.
* ends a turn and nothing else, which is a pause, not a stop.
*/
val PAUSE_GLYPH = glyph(0xF03E4)
@@ -86,8 +80,8 @@ val PLAY_GLYPH = glyph(0xF040A)
* `md-send_clock` -- the same paper plane with a clock on it: this message will wait its turn.
*
* The pair with [SEND_GLYPH] is the point. Sending during a turn queues the message rather than
* starting one, and the two buttons have to be told apart at a glance -- one glyph doing both jobs
* while looking identical would promise something immediate and do something that waits.
* starting one, and one glyph doing both jobs would promise something immediate and do something
* that waits.
*/
val QUEUE_GLYPH = glyph(0xF1163)
@@ -104,8 +98,7 @@ val BELL_GLYPH = glyph(0xF009A)
* `fa-line_chart` -- how much of the account's rate limits is gone.
*
* Font Awesome's rather than Material's, which is the one break in the family above: it was asked
* for by name, and Material's chart glyphs are a bare line where this one has its axes, which is
* what makes it read as a measurement rather than as a trend.
* for by name, and Material's chart glyphs are a bare line where this one has its axes.
*/
val USAGE_GLYPH = glyph(0xF201)
@@ -121,9 +114,8 @@ val SPEED_GLYPH = glyph(0xF04C5)
* `md-folder` -- the files on the machine this session runs on.
*
* The same codepoint dev-updater uses, and it must not drift from it, for the reason the cog and
* the refresh arrow must not: a folder that meant something else in one of the two apps is exactly
* the confusion sharing them prevents. Doubles as the mark on a directory row inside the explorer,
* which is what makes the button say where it leads.
* the refresh arrow must not. Doubles as the mark on a directory row inside the explorer, which is
* what makes the button say where it leads.
*/
val FOLDER_GLYPH = glyph(0xF024B)
@@ -148,10 +140,9 @@ val SAVE_GLYPH = glyph(0xF0193)
* The size an icon draws at beside a line of text.
*
* 17 rather than the 20 it was while the font was the proportional face. A glyph there filled at
* most 0.83 em of its point size and most filled a good deal less, so the number was standing in
* for the headroom above the tallest one; in the Mono face every glyph fills its em exactly, and
* keeping 20 would have made every icon in the app step up by a fifth for no reason anybody asked
* for. This is what the largest of them already drew at.
* most 0.83 em of its point size, so the number was standing in for the headroom above the tallest
* one; in the Mono face every glyph fills its em exactly, and keeping 20 would have stepped every
* icon in the app up by a fifth.
*/
private val GLYPH_SIZE = 17.sp
@@ -165,16 +156,14 @@ private val GLYPH_EXTENT = GLYPH_SIZE.value.dp
*
* The ring is the whole spacing rule. Every gap around a header icon comes out of it -- one ring to
* the screen edge, two where a button meets its neighbour -- so nothing outside has to add a gap of
* its own, and a mark cannot end up further from the button beside it than from the edge of the
* screen. That is what it was: the box was the size of the mark (28dp) and the separation was
* its own. That is what it was: the box was the size of the mark (28dp) and the separation was
* bolted on beside it, which left the two header icons 31dp apart and the outer one 14dp from the
* edge, so a pair that acts on one screen read as two unrelated marks with one falling off it.
* edge.
*
* 48dp is the platform's minimum touch target, so the square is also the whole of what a finger has
* to find. It is what the pressed-state ripple draws, too: at 28dp that circle was inscribed in the
* mark's own corners, and beside a title it arrived at the first letter. And it is taller than any
* header's text, which is what lets the button fill a header row rather than sit in the middle of
* one -- the rows add no vertical padding of their own for the same reason they add no gap.
* to find, and what the pressed-state ripple draws: at 28dp that circle was inscribed in the mark's
* own corners and beside a title it arrived at the first letter. And it is taller than any header's
* text, which is what lets the button fill a header row rather than sit in the middle of one.
*/
private val GLYPH_BUTTON_SIZE = 48.dp
@@ -182,11 +171,9 @@ private val GLYPH_BUTTON_SIZE = 48.dp
* The ring itself, for putting something that is *not* a glyph button next to one -- a title beside
* a back arrow.
*
* Two glyph buttons need nothing between them: each brings its own ring and the two add up, which
* is why a row of them sets no spacing. Text brings none, so the second ring has to be asked for.
* Without it the pressed-state circle, which fills the whole square, arrives at the first letter of
* the title -- and the gap a reader sees between the mark and that title is then half the one
* between the two marks at the other end of the same row.
* Two glyph buttons need nothing between them: each brings its own ring and the two add up. Text
* brings none, so the second ring has to be asked for -- without it the pressed-state circle
* arrives at the first letter of the title.
*/
val GLYPH_BUTTON_MARGIN = (GLYPH_BUTTON_SIZE - GLYPH_EXTENT) / 2
@@ -195,8 +182,7 @@ val GLYPH_BUTTON_MARGIN = (GLYPH_BUTTON_SIZE - GLYPH_EXTENT) / 2
*
* Its own composable so that every icon button in the app is one size and one colour without each
* caller saying so, and so the [label] none of them displays is still there for a screen reader --
* which is all assistive technology has to go on, and also the answer to "what was that button for"
* six months from now.
* which is also the answer to "what was that button for" six months from now.
*
* [enabled] is passed through rather than left to callers hiding the button: a control that comes
* and goes makes its own absence the signal, and absence cannot say whether there was nothing to do
@@ -220,9 +206,8 @@ fun GlyphButton(
* The same square, around a mark that is not a glyph.
*
* A [Chevron] is drawn rather than set in a font, and a pair of them used as buttons has to be the
* size, spacing and touch target every other icon button on this app's headers already is -- so
* this is [GlyphButton] with the mark left to the caller rather than a second set of measurements
* beside it. The caller still owes it a [label]: nothing here draws a word.
* size, spacing and touch target every other icon button already is. The caller still owes it a
* [label]: nothing here draws a word.
*/
@Composable
fun MarkButton(
@@ -245,9 +230,7 @@ fun MarkButton(
* The square a glyph button occupies, with a spinner in it instead of a mark.
*
* For a button whose work is under way. It takes the button's whole box rather than the mark's, so
* swapping one for the other leaves everything in the row exactly where it was -- a control that
* changed the width of its header while it worked would move its neighbours at the moment somebody
* was pressing them.
* swapping one for the other leaves everything in the row exactly where it was.
*/
@Composable
fun GlyphSpinner(label: String, modifier: Modifier = Modifier) {
@@ -273,10 +256,9 @@ fun Glyph(
size: TextUnit = GLYPH_SIZE,
) {
// Line height of the point size, which for this font is the square the glyph draws in: its
// ascent and descent add up to exactly one em, and every glyph in the Mono face fills that em.
// Left to the inherited body style the line box was 24sp tall around a 17sp-wide mark, so a
// glyph took a seventh more vertical space than horizontal wherever one is drawn without a box
// around it -- and where there is a box, that leading is what its padding is measured through.
// ascent and descent add up to exactly one em. Left to the inherited body style the line box
// was 24sp tall around a 17sp-wide mark, so a glyph took a seventh more vertical space than
// horizontal.
Text(
glyph,
fontFamily = NerdIcons,
app/androidApp/src/main/kotlin/com/example/aiapp/Notifications.kt
+45 -59
View File
@@ -34,12 +34,11 @@ import org.json.JSONObject
* gets a push from Google's servers, which would mean this backend talking to Google about
* somebody's coding sessions, and the whole point of the tunnel is that it does not.
*
* The cost Android charges for it is a notification of its own that cannot be dismissed. That is
* made as quiet as the platform allows: [ONGOING_CHANNEL] is `IMPORTANCE_MIN`, so it makes no
* sound, shows no status-bar icon, and sits at the bottom of the shade -- the same arrangement
* Syncthing's "hide the persistent notification" option produces. It is not hidden outright,
* because it cannot be and because it should not be: it is the honest indicator that something is
* holding a connection open.
* The cost Android charges is a notification of its own that cannot be dismissed. That is made as
* quiet as the platform allows: [ONGOING_CHANNEL] is `IMPORTANCE_MIN`, so it makes no sound, shows
* no status-bar icon, and sits at the bottom of the shade. It is not hidden outright, because it
* cannot be and because it should not be: it is the honest indicator that something is holding a
* connection open.
*/
class NotificationService : Service() {
@Volatile private var stream: HttpURLConnection? = null
@@ -50,18 +49,18 @@ class NotificationService : Service() {
override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
val settings = loadServerSettings(this)
if (settings == null) {
// Nothing to connect to. Stopping rather than idling: a service
// holding no connection still costs the ongoing notification,
// which would then be announcing work that is not happening.
// Nothing to connect to. Stopping rather than idling: a service holding no connection
// still costs the ongoing notification, which would be announcing work that is not
// happening.
stopSelf()
return START_NOT_STICKY
}
// Through ServiceCompat so the type is stated once and ignored on
// the versions that predate types, rather than branching here.
// Through ServiceCompat so the type is stated once and ignored on the versions that predate
// types, rather than branching here.
ServiceCompat.startForeground(this, ONGOING_ID, ongoingNotification(), foregroundType())
thread(isDaemon = true, name = "ai-app-notifications") { follow(settings) }
// Restarted if Android kills it, which is the whole point: the
// window this covers is exactly the one where nobody is watching.
// Restarted if Android kills it, which is the whole point: the window this covers is
// exactly the one where nobody is watching.
return START_STICKY
}
@@ -73,11 +72,10 @@ class NotificationService : Service() {
/**
* Follows the backend's notification stream, reconnecting until stopped.
*
* A dropped connection is the ordinary case here rather than an error -- a phone changes
* networks, the tunnel comes and goes, the backend restarts -- so it retries quietly and
* forever. Nothing is shown when it cannot connect: a notification saying "I could not tell you
* whether anything happened" on a phone in somebody's pocket is noise about a condition they
* cannot act on, and the session list already says what is waiting when they next look.
* A dropped connection is the ordinary case here rather than an error, so it retries quietly
* and forever. Nothing is shown when it cannot connect: a notification saying "I could not tell
* you whether anything happened" is noise about a condition nobody can act on, and the session
* list already says what is waiting when they next look.
*/
private fun follow(settings: ServerSettings) {
while (!stopping) {
@@ -102,8 +100,8 @@ class NotificationService : Service() {
try {
connection.applyPinnedTls()
connection.connectTimeout = CONNECT_TIMEOUT_MS
// No read timeout, for the reason EventStream gives: between
// notifications there is nothing to read, possibly for hours.
// No read timeout, for the reason EventStream gives: between notifications there is
// nothing to read, possibly for hours.
connection.readTimeout = 0
connection.setRequestProperty("Authorization", "Bearer ${settings.token}")
connection.setRequestProperty("Accept", "text/event-stream")
@@ -134,28 +132,23 @@ class NotificationService : Service() {
*
* Keyed by session id rather than accumulating: two sessions wanting attention are two things
* to know about, but one session that finished and then asked a question is one thing -- the
* question. A stack of stale rows for the same conversation is how a notification drawer
* becomes something to clear rather than read.
* question. A stack of stale rows is how a drawer becomes something to clear rather than read.
*/
private fun show(notification: SessionNotification) {
// Nothing to tell somebody about the session they are reading. The transcript in front of
// them is already saying it, and a sound over the top of it would be this app announcing
// what the screen is showing.
// them is already saying it.
if (isOnScreen(notification.sessionId)) return
// The app is up: it says this itself, as a banner over whatever screen they are on. See
// [forTheScreen]. Never both -- one thing happened, and a drawer filling up behind an
// app that already showed you each one is a drawer nobody reads.
// The app is up: it says this itself, as a banner over whatever screen they are on. Never
// both -- one thing happened, and a drawer filling up behind an app that already showed you
// each one is a drawer nobody reads.
if (handOver(notification)) return
val manager = NotificationManagerCompat.from(this)
// Two different noes, and both are answers rather than faults: the runtime permission
// refused, and notifications switched off for the app in Android's own settings. Neither
// is reported anywhere -- the person said no, and saying it back to them through the
// channel they closed is not available anyway.
// refused, and notifications switched off for the app in Android's own settings.
//
// The permission only exists from Android 13. Asking an older version about it gets
// "denied" for a name it does not know, which read as the person having said no -- so
// every notification on Android 12 and below was silently dropped. Before 13 the
// switch in Android's own settings, checked below, is the whole of the answer.
// "denied" for a name it does not know, which read as the person having said no -- so every
// notification on Android 12 and below was silently dropped.
val allowed =
Build.VERSION.SDK_INT < Build.VERSION_CODES.TIRAMISU ||
ContextCompat.checkSelfPermission(this, Manifest.permission.POST_NOTIFICATIONS) ==
@@ -187,9 +180,8 @@ class NotificationService : Service() {
* The type Android 14+ requires a foreground service to declare, and nothing before it.
*
* Named behind a version check rather than passed as a constant: the value is inlined at
* compile time and would be handed to platforms that have no concept of it, which is exactly
* the case lint's InlinedApi exists to catch. Zero is what ServiceCompat wants where types do
* not apply.
* compile time and would be handed to platforms that have no concept of it, which is what
* lint's InlinedApi exists to catch.
*/
private fun foregroundType(): Int =
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.UPSIDE_DOWN_CAKE) {
@@ -226,11 +218,10 @@ class NotificationService : Service() {
/**
* Two channels, because they are two different things to be told.
*
* The alerts are what somebody turned this on for, so they get the default importance and
* whatever sound and heads-up display the person has chosen for the app. The ongoing one is
* the platform's tax for staying connected, so it takes the lowest importance that exists.
* Both are created before the service starts, since posting to a channel that does not
* exist is silently dropped.
* The alerts are what somebody turned this on for, so they get the default importance. The
* ongoing one is the platform's tax for staying connected, so it takes the lowest
* importance that exists. Both are created before the service starts, since posting to a
* channel that does not exist is silently dropped.
*/
private fun createChannels(context: Context) {
val manager = NotificationManagerCompat.from(context)
@@ -256,12 +247,10 @@ class NotificationService : Service() {
* The session somebody is looking at, or null when no screen is showing one.
*
* Process-wide state, which the rest of this app does without: Android constructs the
* service and the composition draws the screen, so the two have no common owner a value
* could be passed through. [showing] and [stoppedShowing] are the pair, both called from
* the one composable that shows a session. Clearing names the session rather than setting
* null outright, because moving from one session to another composes the new screen before
* the old one's coroutine is cancelled -- an unconditional clear would then throw away the
* new screen's claim and start notifying about what is on it.
* service and the composition draws the screen, so the two have no common owner. Clearing
* names the session rather than setting null outright, because moving from one session to
* another composes the new screen before the old one's coroutine is cancelled -- an
* unconditional clear would throw away the new screen's claim.
*/
@Volatile private var onScreen: String? = null
@@ -271,10 +260,9 @@ class NotificationService : Service() {
* The way a notification reaches the app instead of Android's drawer.
*
* Whether there is an app to reach is the subscriber count rather than a flag of its own:
* [SessionAlerts] collects this exactly while it is on screen, so there is nothing that
* could be left saying the app is up after it has gone. `tryEmit` neither suspends nor
* blocks the thread reading the stream, and the buffer is there so a handful of sessions
* finishing together all land rather than the last one winning.
* [SessionAlerts] collects this exactly while it is on screen. `tryEmit` neither suspends
* nor blocks the thread reading the stream, and the buffer is there so a handful of
* sessions finishing together all land rather than the last one winning.
*/
private val toApp = MutableSharedFlow<SessionNotification>(extraBufferCapacity = 8)
@@ -287,9 +275,8 @@ class NotificationService : Service() {
/** Somebody is looking at [sessionId]; nothing is posted about it until they stop. */
fun showing(context: Context, sessionId: String) {
onScreen = sessionId
// Whatever was posted about it before is about to be read, so it has nothing left
// to say -- and a row in the drawer for the conversation on screen is the same
// duplication this whole rule is about.
// Whatever was posted about it before is about to be read, so it has nothing left to
// say.
NotificationManagerCompat.from(context).cancel(sessionId, ALERT_ID)
}
@@ -311,8 +298,8 @@ class NotificationService : Service() {
* The intent that opens one session, and the id it carries back out.
*
* The two halves are written together so neither can be changed without the other, and the scheme
* is enrollment's `aiapp://` under a different host so that [MainActivity] has one thing to look at
* when an intent arrives rather than two.
* is enrollment's `aiapp://` under a different host so that [MainActivity] has one thing to look
* at.
*
* The id rides in the intent's **data** rather than in an extra, which is not a style choice:
* PendingIntent identity is `Intent.filterEquals`, and that compares the data while ignoring
@@ -345,9 +332,8 @@ data class SessionNotification(
* What a notification asks of the reader, in the words they see.
*
* What they have to do, not what the session did: "awaitingInput" is the wire's word and says
* nothing to somebody reading a lock screen. One function because the same fact is now shown in two
* places -- Android's drawer and the app's own banner -- and two mappings of one word drift. The
* banner colours the line as well, which is its own decision and stays with the drawing.
* nothing to somebody reading a lock screen. One function because the same fact is shown in two
* places -- Android's drawer and the app's own banner -- and two mappings of one word drift.
*/
fun attentionLine(kind: String): String =
when (kind) {
app/androidApp/src/main/kotlin/com/example/aiapp/PeerMessage.kt
+14 -17
View File
@@ -31,13 +31,12 @@ import androidx.compose.ui.unit.dp
*
* Drawn as its own kind rather than as the reader's own bubble. They did not say this, and a
* transcript that puts it in their voice is making a claim about who asked for the work that
* follows -- which is exactly the question a peer message is usually the answer to.
* follows.
*
* Opened, the card is drawn in *pieces* -- this heading and one [PeerBlockRow] per markdown block,
* each its own item of the transcript list. See [TranscriptUnit.PeerHead] for the measurements that
* bought; what matters here is that the pieces have to add up to the card that was there before, so
* the fill, the corner radius and the padding all live in [peerSurface] rather than being written
* out at each piece.
* each its own item of the transcript list. See [TranscriptUnit.PeerHead] for what that bought;
* what matters here is that the pieces have to add up to the card that was there before, so the
* fill, the corner radius and the padding all live in [peerSurface].
*/
@Composable
fun PeerHeadRow(
@@ -91,9 +90,9 @@ fun PeerBlockRow(unit: TranscriptUnit.PeerBlock, replies: ParsedReplies, onToggl
// The words shut the card too, and have to do it themselves -- see [LocalMarkdownTap].
// Without this the card closes everywhere except on the text, which is most of it.
CompositionLocalProvider(LocalMarkdownTap provides rememberMarkdownTap(onToggle)) {
// The gap the card's own column used to provide between its heading and its prose,
// and between one block and the next -- inside the piece, so the card's fill runs
// through it.
// The gap the card's own column used to provide between its heading and its prose, and
// between one block and the next -- inside the piece, so the card's fill runs through
// it.
MarkdownPiece(unit.text, unit.piece, replies, Modifier.padding(top = unit.spacing))
}
}
@@ -102,16 +101,14 @@ fun PeerBlockRow(unit: TranscriptUnit.PeerBlock, replies: ParsedReplies, onToggl
/**
* One piece of a card drawn in slices: the fill, the corners it owns, and the room inside it.
*
* A filled Material card is elevation zero ([CardDefaults] takes it from `FilledCardTokens`, which
* is `Level0`), so there is no shadow that a seam would show through -- which is the whole reason a
* card can be cut up at all. Each piece paints the caller's container colour the way a
* [androidx.compose .material3.Card] would and rounds only the corners at the ends of the message,
* so the pieces abut into one continuous card. Shared by the two rows that are cut this way -- an
* opened peer message and a long user message -- because two copies of the corner logic is how one
* of them grows a seam.
* A filled Material card is elevation zero, so there is no shadow that a seam would show through --
* which is the whole reason a card can be cut up at all. Each piece paints the caller's container
* colour and rounds only the corners at the ends of the message, so the pieces abut into one
* continuous card. Shared by the two rows cut this way -- an opened peer message and a long user
* message -- because two copies of the corner logic is how one of them grows a seam.
*
* The padding is the other half of it: 12dp all round was the card's own, so the top piece keeps
* the top of it, the bottom piece the bottom, and the middle pieces neither.
* The padding is the other half: 12dp all round was the card's own, so the top piece keeps the top
* of it, the bottom piece the bottom, and the middle pieces neither.
*/
@Composable
fun Modifier.cardPiece(
app/androidApp/src/main/kotlin/com/example/aiapp/PendingAttachments.kt
+11 -18
View File
@@ -34,13 +34,10 @@ import androidx.compose.ui.unit.sp
* What is about to be sent, directly above the box it will be sent from.
*
* The count on the "+" button was the whole of what said an image was attached, so the only way to
* find out *which* image was to send it. A control belongs with the thing it acts on, and what
* these are attached to is the message being typed -- which is why they sit here rather than
* anywhere else on the screen.
* find out *which* image was to send it. A control belongs with the thing it acts on.
*
* Scrolls sideways rather than wrapping or shrinking: the row keeps one thumbnail size whatever is
* in it, so four attachments look like four of the same thing rather than four smaller ones. A file
* is a tile of the same height carrying its name, since a name is all there is to show of it.
* in it, so four attachments look like four of the same thing rather than four smaller ones.
*/
@Composable
fun PendingAttachments(
@@ -67,8 +64,7 @@ fun PendingAttachments(
*
* Removal is here because there is nowhere else it could be: an image picked by mistake could
* otherwise only be dealt with by sending it. The whole thumbnail is the target rather than a
* corner cross -- a cross small enough to sit on a 64dp square is smaller than a fingertip -- and
* the label is what says so, since nothing about the picture does.
* corner cross -- a cross small enough to sit on a 64dp square is smaller than a fingertip.
*/
@Composable
private fun PendingThumbnail(
@@ -84,8 +80,7 @@ private fun PendingThumbnail(
.clip(shape)
// An outline as well as a fill. Most of what gets attached here is a screenshot of a
// dark app, and cropped to a square its middle is often near-black -- against this
// background the tile then had no edge at all, and the only thing saying an image was
// attached was the cross drawn on top of nothing.
// background the tile then had no edge at all.
.border(1.dp, MaterialTheme.colorScheme.outlineVariant, shape)
// Behind the picture as well as under a missing one, so the tile is a tile before
// anything has arrived to fill it.
@@ -105,9 +100,9 @@ private fun PendingThumbnail(
color = MaterialTheme.colorScheme.onSurfaceVariant,
)
} else {
// A spinner, as the transcript's images have: one appearance for "a picture
// is on its way", learned once. An ellipsis had to be read as a spinner that
// was not moving.
// A spinner, as the transcript's images have: one appearance for "a picture is
// on its way", learned once. An ellipsis had to be read as a spinner not
// moving.
CircularProgressIndicator(Modifier.size(20.dp), strokeWidth = 2.dp)
}
else ->
@@ -118,14 +113,12 @@ private fun PendingThumbnail(
modifier = Modifier.size(THUMBNAIL),
)
}
// The whole square removes it, and this only says so. A cross small enough to sit in
// the corner of a 64dp thumbnail is smaller than a fingertip, so making it the target
// would be a control drawn at a size nobody can hit.
// The whole square removes it, and this only says so. A cross small enough to sit in the
// corner of a 64dp thumbnail is smaller than a fingertip.
//
// The disc is sized here and the mark centred inside it, rather than the glyph being
// aligned directly: a glyph's box is wider than the cross it draws, so aligning the box
// to the corner hung the visible mark over the edge and put its backing somewhere the
// eye reads as a second, misplaced square.
// aligned directly: a glyph's box is wider than the cross it draws, so aligning the box to
// the corner hung the visible mark over the edge.
Box(
Modifier.align(Alignment.TopEnd)
.padding(2.dp)
app/androidApp/src/main/kotlin/com/example/aiapp/PinnedCert.kt
+6 -8
View File
@@ -3,15 +3,13 @@ package com.example.aiapp
import com.example.wgapplink.PinnedTls
import java.net.HttpURLConnection
// PINNED_CA_PEM is generated at build time from the CA on the machine doing
// the build -- see the generatePinnedCert task in build.gradle.kts. It is
// deliberately not a checked-in constant: the private key that signs against
// it must never be anywhere this repo is, and an APK should pin whatever CA
// the backend it was built for actually serves.
// PINNED_CA_PEM is generated at build time from the CA on the machine doing the build -- see the
// generatePinnedCert task in build.gradle.kts. It is deliberately not a checked-in constant: the
// private key that signs against it must never be anywhere this repo is, and an APK should pin
// whatever CA the backend it was built for actually serves.
//
// The pinning itself lives in wg-app-link, since dev-updater needs exactly
// the same thing. What stays here is the one product-specific fact -- which
// certificate this app pins.
// The pinning itself lives in wg-app-link, since dev-updater needs exactly the same thing. What
// stays here is which certificate this app pins.
private val pinned = PinnedTls(PINNED_CA_PEM)
/** Every request this app makes goes through this -- there is no unpinned path. */
app/androidApp/src/main/kotlin/com/example/aiapp/RawBlock.kt
+4 -7
View File
@@ -16,20 +16,17 @@ import androidx.compose.ui.unit.dp
*
* A composable rather than a modifier repeated at each site, because the inset is part of it --
* monospace text drawn hard against the edge of a tinted block reads as a clipping fault, and three
* copies of "clip, fill, pad" drift apart the first time one of them is adjusted.
* copies of "clip, fill, pad" drift apart the first time one is adjusted.
*
* The colour is [rawSurface], which is also what a code block inside a reply is given; that is the
* point of having one name for it. Markdown's blocks are painted by the renderer rather than by
* this, since it draws its own, but they are the same colour on purpose.
* The colour is [rawSurface], which is also what a code block inside a reply is given.
*/
@Composable
fun RawBlock(modifier: Modifier = Modifier, content: @Composable ColumnScope.() -> Unit) {
Column(
modifier
.fillMaxWidth()
// Smaller than a card's radius, and deliberately: this sits *inside* one, and a
// rounded rectangle drawn at the same radius as the rounded rectangle behind it reads
// as a misprint rather than as nesting.
// Smaller than a card's radius, and deliberately: this sits *inside* one, and a rounded
// rectangle drawn at the same radius as the one behind it reads as a misprint.
.clip(MaterialTheme.shapes.extraSmall)
.background(rawSurface)
.padding(horizontal = 8.dp, vertical = 6.dp),
app/androidApp/src/main/kotlin/com/example/aiapp/ResetCountdown.kt
+7 -10
View File
@@ -4,17 +4,16 @@ import java.time.Duration
import java.time.OffsetDateTime
// How long is left in a usage window. Shared by the session bar and the usage screen: the
// arithmetic is the same in both and only the sentence around it differs, so everything here
// returns the span or the state on its own and leaves the wording to the caller.
// arithmetic is the same in both, so everything here returns the span or the state on its own and
// leaves the wording to the caller.
/**
* "1d 4h", "3h 12m", "12m" -- the span alone, with no leading or trailing words.
*
* Rounded **up** to the whole minute, rather than truncated as it was. A window with 3h 12m 50s
* left is nearer four minutes past the twelve than it is to twelve, and truncating also parks the
* figure on a minute it has already spent -- so the reader watching the number decide whether to
* start something was consistently told less headroom than they had. One rule, so the session bar
* and the usage dialog cannot round a shared measurement two different ways.
* figure on a minute it has already spent. One rule, so the session bar and the usage dialog cannot
* round a shared measurement two different ways.
*/
fun formatSpan(until: Duration): String {
val up = if (until.seconds % 60 == 0L && until.nano == 0) until else until.plusMinutes(1)
@@ -31,14 +30,12 @@ fun formatSpan(until: Duration): String {
* Three answers rather than a nullable duration, because two of them shared `null` and they are not
* the same thing at all. A window the server sent no reset time for is one that is **not running**:
* the five-hour window is anchored to the block it started in, so between sessions there is nothing
* counting down and the API says so by omitting the field -- measured against a live response on
* 2026-08-31, where the five-hour window's reset was exactly five hours after the moment work
* resumed. A timestamp that did arrive and could not be read is the genuinely unknown case, and it
* is the only one worth those words.
* counting down and the API says so by omitting the field. A timestamp that did arrive and could
* not be read is the genuinely unknown case.
*
* Collapsing them put "reset time unknown" on the session bar for a machine behaving perfectly, on
* the one row somebody reads before starting something big -- and the usage dialog, looking at the
* same field, quietly drew nothing. Two rules for one missing value; this is the rule.
* same field, quietly drew nothing.
*/
sealed class WindowEnd {
/** No reset time was sent, so nothing is running in this window. Not a failure to find out. */
app/androidApp/src/main/kotlin/com/example/aiapp/ScrollAnchor.kt
+12 -16
View File
@@ -10,24 +10,21 @@ private const val ANCHORS = "session-scroll"
*
* Named by a **sequence number** -- see [TranscriptRow.startSeq] -- rather than by an index or by
* the row key the list draws with. An index means nothing across a reopen, since the transcript is
* fetched newest-first and a session that has said anything since has renumbered every position.
* The row key looks stable and is not: a tool row is named after its run, `joinPages` gives a run
* the name of its newest half, and the newest half is whatever the newest page happened to start
* with -- so an active session renames its tool runs every time it is reopened, and an anchor
* naming one is never found. A seq is the server's own numbering, assigned once and never moved.
* fetched newest-first. The row key looks stable and is not: a tool row is named after its run,
* `joinPages` gives a run the name of its newest half, and the newest half is whatever the newest
* page started with -- so an active session renames its tool runs every time it is reopened. A seq
* is the server's own numbering, assigned once and never moved.
*
* [unit] is which unit of the row the viewport started at -- see [TranscriptUnit.ordinal] -- and
* [offset] how far that unit was scrolled past the viewport's newest edge, in pixels. A seq alone
* is not a place: a reply is one seq and can be forty blocks long, and a reader stopped halfway
* down it is put back at that block, not at the reply.
* [unit] is which unit of the row the viewport started at and [offset] how far that unit was
* scrolled past the viewport's newest edge. A seq alone is not a place: a reply is one seq and can
* be forty blocks long.
*/
data class ScrollAnchor(val seq: Long, val offset: Int, val unit: Int = 0)
/**
* On this device rather than on the backend, which is where this app otherwise keeps state so every
* device sees it. Scroll position is the same exception a draft is: it is where the phone in
* somebody's hand is pointed, and having one device jump because another was scrolled would be a
* surprise rather than a convenience.
* somebody's hand is pointed.
*/
fun loadScrollAnchor(context: Context, sessionId: String): ScrollAnchor? {
val stored =
@@ -36,8 +33,8 @@ fun loadScrollAnchor(context: Context, sessionId: String): ScrollAnchor? {
val fields = stored.split(':')
val seq = fields.getOrNull(0)?.toLongOrNull() ?: return null
val offset = fields.getOrNull(1)?.toIntOrNull() ?: return null
// Positions saved before the unit was recorded name the row's oldest unit, which is the
// closest older place -- the same choice [unitIndexFor] makes when a unit is gone.
// Positions saved before the unit was recorded name the row's oldest unit, which is the closest
// older place -- the same choice [unitIndexFor] makes when a unit is gone.
return ScrollAnchor(seq, offset, fields.getOrNull(2)?.toIntOrNull() ?: 0)
}
@@ -45,9 +42,8 @@ fun loadScrollAnchor(context: Context, sessionId: String): ScrollAnchor? {
* Records where [sessionId] is being read, or forgets it when [anchor] is null.
*
* The path out is reading to the newest end, which is what the caller passes null for: a session
* left at the bottom has nothing to restore and should open at the bottom, which is also the cheap
* case. A session *deleted* while it held an anchor leaves its key behind, for the reason and at
* the cost `Drafts.kt` describes.
* left at the bottom has nothing to restore. A session *deleted* while it held an anchor leaves its
* key behind, for the reason and at the cost `Drafts.kt` describes.
*/
fun saveScrollAnchor(context: Context, sessionId: String, anchor: ScrollAnchor?) {
context.getSharedPreferences(ANCHORS, Context.MODE_PRIVATE).edit {
app/androidApp/src/main/kotlin/com/example/aiapp/ServerConfig.kt
+3 -4
View File
@@ -14,10 +14,9 @@ typealias ServerSettings = com.example.wgapplink.ServerSettings
/**
* This app's enrollment, which is the whole of what is product-specific about it.
*
* Both values are load-bearing and neither may be changed casually. The scheme is what routes a
* scanned QR here rather than to Dev Updater, and the key alias names the Android Keystore key the
* token is already sealed under on every enrolled phone -- changing it would leave those phones
* reading as not enrolled, with no error to explain why.
* Both values are load-bearing. The scheme is what routes a scanned QR here rather than to Dev
* Updater, and the key alias names the Android Keystore key the token is already sealed under on
* every enrolled phone -- changing it would leave those phones reading as not enrolled.
*/
private val store = ServerStore(scheme = "aiapp", keyAlias = "aiapp-token-key")
app/androidApp/src/main/kotlin/com/example/aiapp/SessionAlerts.kt
+24 -34
View File
@@ -33,16 +33,14 @@ import androidx.lifecycle.repeatOnLifecycle
/**
* A session wanting attention, said over the app rather than through Android's drawer.
*
* Two places can carry the same fact and only one of them is right at a time. A row in the shade is
* for somebody looking at something else: it makes a sound, it waits however long it has to, and
* acting on it means leaving whatever they were doing. Somebody with this app open needs none of
* that -- they are already here, and what a tap on the notification would have done is what a tap
* on this does. So while these are on screen the stream is delivered here instead, which is
* arranged by the collection below and nothing else; see `NotificationService.forTheScreen`.
* Two places can carry the same fact and only one is right at a time. A row in the shade is for
* somebody looking at something else: it makes a sound, it waits however long it has to, and acting
* on it means leaving whatever they were doing. Somebody with this app open needs none of that. So
* while these are on screen the stream is delivered here instead, which is arranged by the
* collection below and nothing else.
*
* A banner can go three ways, and each is somebody deciding something different: tapped, which
* opens the session; pushed off either side; or left alone, in which case it goes by itself when
* the bar across its foot runs out.
* A banner can go three ways, each somebody deciding something different: tapped, which opens the
* session; pushed off either side; or left alone, in which case it goes when the bar runs out.
*/
@Composable
fun SessionAlerts(onOpen: (SessionOpenRequest) -> Unit, modifier: Modifier = Modifier) {
@@ -58,28 +56,26 @@ fun SessionAlerts(onOpen: (SessionOpenRequest) -> Unit, modifier: Modifier = Mod
arrivals++
val alert = SessionAlert(notification, arrivals)
// One banner per session, replacing that session's own -- the same rule the
// drawer follows, and for the same reason: a session that finished and then
// asked a question is one thing to know about, the question. It keeps its
// place in the queue rather than moving to the end, because the reader may
// already be reaching for it.
// drawer follows: a session that finished and then asked a question is one
// thing to know about, the question. It keeps its place in the queue rather
// than moving to the end, because the reader may already be reaching for it.
val already = queue.indexOfFirst {
it.notification.sessionId == notification.sessionId
}
if (already >= 0) queue[already] = alert else queue.add(alert)
}
} finally {
// Leaving the app hands the job back to the drawer, so nothing arriving while it
// is away is lost. What would be lost is the truth of what is already up: these
// say a session wants somebody *now*, and one still sitting here on a return
// several minutes later is a claim nobody checked. Frozen, too -- Compose stops
// the clock with the window, so the timer that was going to retire it has been
// standing still the whole time.
// Leaving the app hands the job back to the drawer, so nothing arriving while it is
// away is lost. What would be lost is the truth of what is already up: these say a
// session wants somebody *now*, and one still sitting here on a return several
// minutes later is a claim nobody checked. Frozen, too -- Compose stops the clock
// with the window.
queue.clear()
}
}
}
// Oldest at the top, so a new one appears below the ones already being read instead of
// shoving them down the screen mid-reach.
// Oldest at the top, so a new one appears below the ones already being read instead of shoving
// them down the screen mid-reach.
Column(modifier.fillMaxWidth().padding(8.dp)) {
queue.forEach { alert ->
key(alert.arrival) {
@@ -103,9 +99,7 @@ private data class SessionAlert(val notification: SessionNotification, val arriv
* One banner: what wants attention, and how long this has left to say so.
*
* The bar and the going away are one value rather than a bar beside a timer, because two of them
* would be two accounts of the same countdown and only one can be the one that fires. What is drawn
* is therefore the thing that decides, which is the only arrangement where a bar that has emptied
* cannot be sitting under a banner that is still there.
* would be two accounts of the same countdown and only one can be the one that fires.
*/
@Composable
private fun AlertBanner(alert: SessionAlert, onOpen: () -> Unit, onGone: () -> Unit) {
@@ -135,9 +129,7 @@ private fun AlertBanner(alert: SessionAlert, onOpen: () -> Unit, onGone: () -> U
),
// Outlined, because the step it needs to make is not one this palette can make with a
// tint: the card under a banner on the session list is the same surface, so a banner
// relying on colour alone reads as one more row that happens to be in the way. The
// border is the one cue, and the elevation beside it is the platform's shadow rather
// than a second tint -- Material draws no tonal overlay over a container stated here.
// relying on colour alone reads as one more row in the way. The border is the one cue.
border = BorderStroke(1.dp, MaterialTheme.colorScheme.outline),
elevation = CardDefaults.cardElevation(defaultElevation = 6.dp),
) {
@@ -145,8 +137,8 @@ private fun AlertBanner(alert: SessionAlert, onOpen: () -> Unit, onGone: () -> U
Text(
alert.notification.title,
style = MaterialTheme.typography.titleSmall,
// One line, cut at the tail: a session is identified by the start of its
// name, and a banner that grew with the name would move the one below it.
// One line, cut at the tail: a session is identified by the start of its name,
// and a banner that grew with the name would move the one below it.
maxLines = 1,
overflow = TextOverflow.Ellipsis,
)
@@ -163,9 +155,8 @@ private fun AlertBanner(alert: SessionAlert, onOpen: () -> Unit, onGone: () -> U
LinearProgressIndicator(
progress = { life.value },
// Blue because it is reporting how much of something is left rather than passing
// judgement on it -- the reason `progressColor` exists. Stated beside the track,
// which is the card's own colour so that the spent part reads as empty rather
// than as a second bar.
// judgement on it. Stated beside the track, which is the card's own colour so that
// the spent part reads as empty rather than as a second bar.
color = progressColor,
trackColor = MaterialTheme.colorScheme.surfaceContainerHigh,
drawStopIndicator = {},
@@ -180,7 +171,6 @@ private fun AlertBanner(alert: SessionAlert, onOpen: () -> Unit, onGone: () -> U
* How long a banner stays if nobody touches it.
*
* Long enough to read a session name and a line, short enough that a stack of them clears itself
* while somebody is still on the screen that produced them. The bar makes the number visible, so
* this is a duration the reader can watch rather than one they have to learn.
* while somebody is still on the screen that produced them. The bar makes the number visible.
*/
private const val ALERT_LIFE_MS = 6_000
app/androidApp/src/main/kotlin/com/example/aiapp/SessionImage.kt
+23 -34
View File
@@ -49,10 +49,9 @@ data class SessionBitmap(val bitmap: ImageBitmap?, val failed: Boolean)
/**
* Fetches (authenticated, pinned) and decodes one transcript image, remembered per ref so scrolling
* does not refetch.
*
* Shared by the transcript's images and the composer's pending attachments, because the fetch, the
* decode and the two-state answer are one block of logic that had been written twice.
* does not refetch. Shared by the transcript's images and the composer's pending attachments,
* because the fetch, the decode and the two-state answer are one block of logic that had been
* written twice.
*/
@Composable
fun rememberSessionBitmap(settings: ServerSettings, sessionId: String, ref: String): SessionBitmap {
@@ -75,15 +74,12 @@ fun rememberSessionBitmap(settings: ServerSettings, sessionId: String, ref: Stri
* An image in the transcript: a fixed-height thumbnail that opens full screen.
*
* The height is decided before the bytes arrive and never changes. An image row that grew when it
* finished loading pushed everything below it, so a transcript being read scrolled itself while
* somebody was looking at it -- and in a bottom-anchored list, images loading above the viewport
* moved the text under the reader's eyes. Reserving the final height makes loading invisible, which
* is what it should be.
* finished loading pushed everything below it, so a transcript being read scrolled itself -- and in
* a bottom-anchored list, images loading above the viewport moved the text under the reader's eyes.
*
* Four lines of body text, so a screenshot reads as an attachment beside the conversation rather
* than as a page of its own. Full size is one tap away -- but the full-size view itself is not
* here. [onOpen] hands the ref to the screen, which draws [SessionImageViewer] outside the list;
* see that function for the reason.
* than as a page of its own. The full-size view itself is not here: [onOpen] hands the ref to the
* screen, which draws [SessionImageViewer] outside the list.
*/
@Composable
fun SessionImage(
@@ -97,9 +93,8 @@ fun SessionImage(
val heightPx = with(LocalDensity.current) { height.roundToPx() }
Box(Modifier.fillMaxWidth().height(height), contentAlignment = Alignment.CenterStart) {
when (val image = bitmap) {
// Two states, not one: an image still arriving and an image that will never arrive
// look nothing alike to a reader who can do something about the second. So one gets a
// spinner in the space the picture is about to fill, and the other gets words.
// Two states, not one: an image still arriving and an image that will never arrive look
// nothing alike to a reader who can do something about the second.
null ->
if (failed) {
Text(
@@ -130,15 +125,12 @@ fun SessionImage(
* `Read` on its own is a row of one call, and the moment the next call arrives the two become a
* group -- a different composable in a different part of the tree, so everything the old subtree
* remembered goes, the dialog included. Somebody looking at a screenshot was thrown back to the
* transcript because the session made another tool call. The same happens to a row regrouped by a
* page of history landing.
* transcript because the session made another tool call.
*
* Held by the screen, none of that reaches it: what is open is a property of the screen, not of
* whichever row happened to draw the thumbnail.
* Held by the screen, none of that reaches it: what is open is a property of the screen.
*
* The cost is one fetch, since the thumbnail's decoded bitmap belongs to a row this does not go
* through. Paid deliberately rather than plumbed around: it is one request for a picture somebody
* asked to see, and the loading and unavailable states below are the same two the thumbnail draws.
* through. Paid deliberately: it is one request for a picture somebody asked to see.
*/
@Composable
fun SessionImageViewer(
@@ -157,9 +149,9 @@ fun SessionImageViewer(
contentAlignment = Alignment.Center,
) {
when (val image = bitmap) {
// Two states, not one, exactly as the thumbnail has them: still coming, and never
// coming. Stated in white because this box paints its own black behind them and a
// theme colour would be picked against a surface that is not there.
// Two states, not one, exactly as the thumbnail has them. Stated in white because
// this box paints its own black behind them and a theme colour would be picked
// against a surface that is not there.
null ->
if (failed) {
Text(
@@ -170,8 +162,7 @@ fun SessionImageViewer(
} else {
// The whole dialog is the area this picture is about to fill, so the
// spinner sits in the middle of it. White for the same reason the words
// beside it are: this box paints its own black, and a theme colour would
// be chosen against a surface that is not there.
// beside it are.
CircularProgressIndicator(color = Color.White)
}
else -> ZoomableImage(image)
@@ -185,11 +176,10 @@ fun SessionImageViewer(
*
* A square of the row's own height rather than the full width of the transcript: the height is what
* [SessionImage] reserves and the width is not known until the bytes arrive, so a full-width
* placeholder would promise a picture wider than most of them turn out to be. Square is the closest
* thing to "the size of it" that can be drawn before knowing.
* placeholder would promise a picture wider than most turn out to be.
*
* Tinted, so the reader can see that something is being kept for a picture. That is also what
* distinguishes it from the failure beside it, which is words on the ordinary surface.
* Tinted, so the reader can see that something is being kept for a picture -- which is also what
* distinguishes it from the failure beside it, words on the ordinary surface.
*/
@Composable
private fun LoadingImage(height: Dp) {
@@ -210,8 +200,8 @@ private val LOADING_SPINNER = 24.dp
* Four lines of the body style the transcript is set in.
*
* Measured from the type rather than written as a dp, so it stays four lines when the text size
* changes -- including when the reader has scaled fonts up, which is exactly when a hardcoded
* height would be wrong.
* changes -- including when the reader has scaled fonts up, which is when a hardcoded height is
* wrong.
*/
@Composable
private fun thumbnailHeight(): Dp {
@@ -226,8 +216,7 @@ private fun thumbnailHeight(): Dp {
* Nearest neighbour when the image is being enlarged, smooth when it is being shrunk.
*
* A small image blown up with interpolation turns into a blur that hides what it is -- the same
* image with hard pixel edges stays readable. Shrinking wants the opposite, so this is a decision
* per image rather than a preference set once.
* image with hard pixel edges stays readable. Shrinking wants the opposite.
*/
private fun enlargingFilter(sourceHeight: Int, drawnHeight: Int): FilterQuality =
if (sourceHeight < drawnHeight) FilterQuality.None else FilterQuality.High
@@ -237,7 +226,7 @@ private fun enlargingFilter(sourceHeight: Int, drawnHeight: Int): FilterQuality
*
* Inside a dialog rather than a screen -- see [SessionImageViewer] -- so the platform's back
* gesture returns to the transcript instead of leaving the app. It opens fitted, the whole image
* visible, which is the thing a reader wants first; zoom is theirs from there.
* visible.
*/
@Composable
private fun ZoomableImage(image: ImageBitmap) {
app/androidApp/src/main/kotlin/com/example/aiapp/SessionListScreen.kt
+65 -65
View File
@@ -29,6 +29,7 @@ import androidx.compose.runtime.rememberCoroutineScope
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.unit.dp
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.launch
@@ -52,22 +53,22 @@ fun SessionListScreen(
var listState by remember { mutableStateOf<LoadState<List<SessionSummary>>>(LoadState.Loading) }
var confirmingDelete by remember { mutableStateOf<SessionSummary?>(null) }
// Failures that belong to one session rather than to the list, keyed by
// its id and shown on its own card. The two scopes are decided by
// whether the server answered: it answered and refused, so this says
// nothing about the other rows, where a server that has stopped
// answering leaves every row stale and is `listState`'s to report.
// Failures that belong to one session rather than to the list, keyed by its id and shown on its
// own card. The two scopes are decided by whether the server answered: it answered and refused,
// so this says nothing about the other rows.
//
// Cleared on the next successful load below -- an entry outlives its
// session otherwise, and would reappear against whatever the phone
// fetched next.
// Cleared on the next successful load below -- an entry outlives its session otherwise.
var deleteErrors by remember { mutableStateOf<Map<String, String>>(emptyMap()) }
// Which sessions have a delete in flight. A set of ids rather than a flag on the row,
// because the rows are rebuilt from whatever the server last said and this belongs to the
// request rather than to the session.
// Which sessions have a delete in flight. A set of ids rather than a flag on the row, because
// the rows are rebuilt from whatever the server last said and this belongs to the request.
var deleting by remember { mutableStateOf<Set<String>>(emptySet()) }
// This phone's copies of these sessions' transcripts, pruned from here because this is where a
// session stops existing. See TranscriptCache.
val context = LocalContext.current
val transcriptCache = remember(settings) { TranscriptCache(cacheRoot(context, settings)) }
fun refresh() {
listState = LoadState.Loading
scope.launch {
@@ -76,6 +77,13 @@ fun SessionListScreen(
val loaded =
withContext(Dispatchers.IO) { LoadState.Loaded(fetchSessions(settings)) }
deleteErrors = emptyMap()
// The path out for a cached transcript whose session was deleted somewhere
// else. This list is the only place that ever learns the full set. On the
// answer rather than in `finally`: a list that failed to arrive says nothing
// about which sessions exist.
withContext(Dispatchers.IO) {
transcriptCache.retainOnly(loaded.value.map { it.id }.toSet())
}
loaded
} catch (e: ApiException) {
LoadState.failed(e)
@@ -89,12 +97,9 @@ fun SessionListScreen(
Column(Modifier.fillMaxSize().padding(16.dp)) {
when (val state = listState) {
is LoadState.Loading -> CircularProgressIndicator()
// The message as Api.kt wrote it, with nothing added: it is
// already a whole sentence naming the address and what to
// check, so a prefix here read "Couldn't reach the server:
// Couldn't reach the server at ...". It was also a guess --
// a delete that the server itself refused had reached it
// fine.
// The message as Api.kt wrote it, with nothing added: it is already a whole
// sentence naming the address and what to check, so a prefix here read "Couldn't
// reach the server: Couldn't reach the server at ...".
is LoadState.Error ->
Text(
state.message,
@@ -108,8 +113,7 @@ fun SessionListScreen(
color = MaterialTheme.colorScheme.onSurfaceVariant,
)
}
// Awaiting-answer first (the point of the screen), then
// most recently active.
// Awaiting-answer first (the point of the screen), then most recently active.
val ordered =
state.value.sortedWith(
compareByDescending<SessionSummary> { it.status == "awaitingInput" }
@@ -141,40 +145,37 @@ fun SessionListScreen(
confirmingDelete?.let { session ->
// Reset per session, so a toggle turned on for one conversation is not still on for the
// next one somebody opens this dialog for. Off to begin with: see [deleteSession].
// next. Off to begin with: see [deleteSession].
var alsoDeleteForeign by remember(session.id) { mutableStateOf(false) }
AlertDialog(
onDismissRequest = { confirmingDelete = null },
title = { Text("Delete \"${session.title}\"?") },
text = {
// Two different acts behind one button, so it says which one this is. What
// separates them is whether the *driver* keeps its own record of the
// conversation -- the Claude Code CLI does, under ~/.claude/projects, whether
// this app spawned the session or imported it; echo and llama.cpp do not, and
// for those the app's transcript is the only copy there is.
// separates them is whether the *driver* keeps its own record of the conversation
// -- the Claude Code CLI does, whether this app spawned the session or imported it;
// echo and llama.cpp do not.
//
// This used to branch on `imported`, above a comment asserting that "a session
// started here has no copy anywhere". That was simply false for every
// claude-cli session this app spawned, and the two warnings disagreed about
// sessions that were equally recoverable. Getting it wrong in that direction
// is the expensive one: "this can't be undone", said of something that can,
// spends the credibility the sentence needs on the sessions where it is true.
// started here has no copy anywhere". That was false for every claude-cli session
// this app spawned, and getting it wrong in that direction is the expensive one:
// "this can't be undone", said of something that can, spends the credibility the
// sentence needs.
//
// Neither branch promises a restore. The recoverable one says what is known --
// the driver keeps its own record -- rather than that the file is still there,
// which nothing here checked; and it names what goes either way, because this
// app's transcript holds images, peer messages and commands that the CLI's own
// record never had.
// Neither branch promises a restore. The recoverable one says what is known -- the
// driver keeps its own record -- rather than that the file is still there, and it
// names what goes either way, because this app's transcript holds images, peer
// messages and commands the CLI's own record never had.
Column {
Text(
when {
!session.keepsOwnTranscript ->
"Kills the process and deletes the conversation. Nothing else " +
"keeps a copy, so this can't be undone."
// The sentence below is the one the toggle makes false, which is why
// it is written twice rather than appended to: leaving "should still
// be there to import again" on screen beside a switch that removes it
// is the reassurance being read at the moment it stops being true.
// The sentence below is the one the toggle makes false, which is why it
// is written twice rather than appended to: leaving "should still be
// there to import again" on screen beside a switch that removes it is
// the reassurance being read at the moment it stops being true.
alsoDeleteForeign ->
"Kills the process and deletes both copies of the conversation: " +
"this app's, and Claude Code's own transcript on the " +
@@ -189,12 +190,12 @@ fun SessionListScreen(
)
// Only where there is a second copy to decide about. Absent rather than
// disabled, because this is not a capability being withheld: for echo and
// llama.cpp there is no other transcript, and a switch offering to delete
// one would be asking about something that does not exist.
// llama.cpp there is no other transcript, and a switch offering to delete one
// would be asking about something that does not exist.
if (session.keepsOwnTranscript) {
Spacer(Modifier.height(16.dp))
// Its own row rather than beside the paragraph: a switch is taller than
// a line of text and re-centres whatever shares a row with it.
// Its own row rather than beside the paragraph: a switch is taller than a
// line of text and re-centres whatever shares a row with it.
Row(verticalAlignment = Alignment.CenterVertically) {
Text(
"Delete Claude Code's transcript too",
@@ -215,19 +216,20 @@ fun SessionListScreen(
onClick = {
confirmingDelete = null
// Marked here rather than after the request returns: the row has to say
// something is happening to it from the moment it is asked for, which
// is the whole of what this state is for.
// something is happening to it from the moment it is asked for.
deleting = deleting + session.id
deleteErrors = deleteErrors - session.id
scope.launch {
try {
withContext(Dispatchers.IO) {
deleteSession(settings, session.id, alsoDeleteForeign)
// After it succeeded, not before: a refused delete leaves the
// session exactly as it was, and its transcript with it.
transcriptCache.session(session.id).purge()
}
// Only this row, and only what changed. Refetching the list
// instead put every other session back through loading and
// handed the reader an empty screen -- to report on something
// that was never in doubt.
// Only this row, and only what changed. Refetching the list instead
// put every other session back through loading and handed the
// reader an empty screen, to report on something never in doubt.
val loaded = listState
if (loaded is LoadState.Loaded) {
listState =
@@ -246,8 +248,8 @@ fun SessionListScreen(
}
}
) {
// Coloured by consequence: this takes something away, and does so wherever
// it appears -- the same rule the import screen's Delete follows.
// Coloured by consequence: this takes something away, and does so wherever it
// appears -- the same rule the import screen's Delete follows.
Text("Delete", color = MaterialTheme.colorScheme.error)
}
},
@@ -269,8 +271,7 @@ private fun SessionCard(
*
* Suspended rather than removed while it is -- see [BusyItem] -- which says the row is on its
* way out without claiming it has gone: a row removed the moment Delete is pressed is a promise
* about a request that has not been answered yet, and putting it back when the server refuses
* is worse than never having taken it away.
* about a request that has not been answered yet.
*/
deleting: Boolean,
onOpen: () -> Unit,
@@ -278,9 +279,9 @@ private fun SessionCard(
) {
BusyItem(label = if (deleting) "deleting" else null) {
Card(
// Off while the delete is in flight: a card that still opens a session it is
// deleting is a race the reader can start by tapping. On the card rather than in
// [BusyItem], which leaves gestures alone so the list still scrolls.
// Off while the delete is in flight: a card that still opens a session it is deleting
// is a race the reader can start by tapping. On the card rather than in [BusyItem],
// which leaves gestures alone so the list still scrolls.
Modifier.fillMaxWidth()
.combinedClickable(
enabled = !deleting,
@@ -303,9 +304,9 @@ private fun SessionCard(
Spacer(Modifier.height(4.dp))
Row(modifier = Modifier.fillMaxWidth()) {
Text(
// Machine, then what runs on it, then what it is set to: the same order
// and separator as the session screen's header and the usage dialog, so
// one pair of facts is not written three ways.
// Machine, then what runs on it, then what it is set to: the same order and
// separator as the session screen's header and the usage dialog, so one
// pair of facts is not written three ways.
listOfNotNull(
session.setupName,
session.provider,
@@ -324,8 +325,7 @@ private fun SessionCard(
}
error?.let {
Spacer(Modifier.height(8.dp))
// The server's own words, unprefixed, the way every other
// failure in this app is shown.
// The server's own words, unprefixed, the way every other failure is shown.
Text(
it,
style = MaterialTheme.typography.bodySmall,
@@ -345,16 +345,16 @@ fun StatusText(status: String) {
"running" -> "running" to runningColor
"compacting" -> "compacting" to commandColor
"exited" -> "exited" to MaterialTheme.colorScheme.onSurfaceVariant
// Said in words, because it differs in kind from the others rather than in degree:
// the session is not idle and has not exited, nobody has been able to find out
// which. A muted colour alone would read as one of the quiet states.
// Said in words, because it differs in kind from the others rather than in degree: the
// session is not idle and has not exited, nobody has been able to find out which. A
// muted colour alone would read as one of the quiet states.
"unknown" -> "can't tell" to MaterialTheme.colorScheme.onSurfaceVariant
else -> status to MaterialTheme.colorScheme.onSurfaceVariant
}
Row(verticalAlignment = Alignment.CenterVertically) {
if (sessionWorking(status)) {
// The same colour as the word beside it: the two are one signal, and a spinner in
// the theme's accent says the state is something other than what the label says.
// The same colour as the word beside it: the two are one signal, and a spinner in the
// theme's accent says the state is something other than what the label says.
CircularProgressIndicator(
modifier = Modifier.width(14.dp).height(14.dp),
strokeWidth = 2.dp,
app/androidApp/src/main/kotlin/com/example/aiapp/SessionScreen.kt
+644 -773
View File
File diff suppressed because it is too large. Load diff
app/androidApp/src/main/kotlin/com/example/aiapp/SessionSettingsDialog.kt
+71 -31
View File
@@ -39,12 +39,11 @@ import kotlinx.coroutines.withContext
* controls and hid the thing they act on.
*
* The model and the permission mode are deliberately still on the session's own bar, because those
* are changed *while* reading a turn -- "not this model, try that one" -- and a control belongs
* with the thing it acts on.
* are changed *while* reading a turn -- "not this model, try that one".
*
* Nothing here is captioned. Each control is a labelled noun with a switch or a field beside it,
* and a paragraph under every one of them made the dialog longer than the conversation it covers.
* Failures still get their words: those are what the reader cannot work out by looking.
* Captions are for what a control costs rather than for what it is. A paragraph under every control
* made the dialog longer than the conversation it covers -- so Notifications has none, while Move
* and Reload do, because what those two take away is not visible from here.
*/
@Composable
fun SessionSettingsDialog(
@@ -55,10 +54,16 @@ fun SessionSettingsDialog(
*/
title: String,
onRenamed: (String) -> Unit,
/**
* What this phone is holding of the conversation, or null while that is being measured -- see
* the Reload row below, which is what would discard it.
*/
cachedBytes: Long?,
onReload: () -> Unit,
onDismiss: () -> Unit,
/**
* Copies what this session costs to draw. Built by the session screen, because everything it
* measures is that screen's own state -- see `copyRenderReport` there.
* measures is that screen's own state.
*/
onCopyRenderReport: () -> Unit,
) {
@@ -68,16 +73,14 @@ fun SessionSettingsDialog(
var error by remember { mutableStateOf<String?>(null) }
// Null until the server has been asked. The row this dialog was opened over is a snapshot of
// whenever the list was last fetched, so drawing the switch straight from it would show a
// position that may have been changed since -- from here or from another device -- with
// nothing to say so. Until the answer arrives the switch is disabled and a spinner sits beside
// it, which is what not knowing looks like: distinguishable from off, and from a refusal.
// position that may have been changed since. Until the answer arrives the switch is disabled
// and a spinner sits beside it, which is what not knowing looks like.
var notify by remember(sessionId) { mutableStateOf<Boolean?>(null) }
var notifyError by remember { mutableStateOf<String?>(null) }
// Where the session works. Null until the server has been asked, for the same reason the
// switch above is: the row this dialog opened over is a snapshot, and a path drawn from it
// could be one somebody changed from another device. An empty answer is a session that was
// never given a directory, which is not the same as one whose directory is unknown -- the
// field is only enabled once one of those two is settled.
// Where the session works. Null until the server has been asked, for the same reason the switch
// above is. An empty answer is a session that was never given a directory, which is not the
// same as one whose directory is unknown -- the field is only enabled once one of those is
// settled.
var cwd by remember(sessionId) { mutableStateOf<String?>(null) }
var typedCwd by remember(sessionId) { mutableStateOf("") }
var cwdError by remember { mutableStateOf<String?>(null) }
@@ -90,8 +93,8 @@ fun SessionSettingsDialog(
cwd = fresh.cwd.orEmpty()
typedCwd = fresh.cwd.orEmpty()
} catch (e: ApiException) {
// Left unknown rather than falling back to the stale row: the switch stays
// disabled, instead of offering a position nothing confirmed.
// Left unknown rather than falling back to the stale row: the switch stays disabled,
// instead of offering a position nothing confirmed.
notifyError = e.message
notify = null
}
@@ -123,8 +126,8 @@ fun SessionSettingsDialog(
}
// Moved optimistically so the switch answers the finger that moved it, and put back if the
// request is refused -- a switch that waits for a round trip reads as broken on a slow
// tunnel, and one that stays moved after a refusal lies.
// request is refused -- a switch that waits for a round trip reads as broken on a slow tunnel,
// and one that stays moved after a refusal lies.
fun setNotify(wanted: Boolean) {
val was = notify
notify = wanted
@@ -154,7 +157,7 @@ fun SessionSettingsDialog(
onRenamed(chosen)
} catch (e: ApiException) {
// Reported here, where it happened, because this dialog is the only place that
// knows a rename was attempted -- the session behind it shows nothing about it.
// knows a rename was attempted.
error = e.message
saving = false
}
@@ -173,8 +176,8 @@ fun SessionSettingsDialog(
singleLine = true,
enabled = !saving,
modifier = Modifier.fillMaxWidth(),
// The keyboard's own action does what the button does: a one-field form
// where the return key does nothing is a form people press return at anyway.
// The keyboard's own action does what the button does: a one-field form where
// the return key does nothing is a form people press return at anyway.
keyboardOptions = KeyboardOptions(imeAction = ImeAction.Done),
keyboardActions = KeyboardActions(onDone = { save() }),
)
@@ -199,8 +202,8 @@ fun SessionSettingsDialog(
enabled = notify != null,
)
}
// Beside the switch that failed, not with the rename's error: they are two
// requests and a reader has to be able to tell which one the server refused.
// Beside the switch that failed, not with the rename's error: they are two requests
// and a reader has to be able to tell which one the server refused.
notifyError?.let {
Text(
it,
@@ -217,9 +220,9 @@ fun SessionSettingsDialog(
value = typedCwd,
onValueChange = { typedCwd = it },
label = { Text("Working directory") },
// What the field cannot say by being empty: a session that was never
// given one starts wherever its launcher does, and this names that
// rather than showing a path nobody chose.
// What the field cannot say by being empty: a session that was never given
// one starts wherever its launcher does, and this names that rather than
// showing a path nobody chose.
placeholder = { Text("wherever the session was started") },
singleLine = true,
enabled = cwd != null && !movingCwd,
@@ -239,9 +242,8 @@ fun SessionSettingsDialog(
}
}
// The whole of what pressing Move does, where it is about to be pressed. A
// directory is settled when the process is spawned, so there is no changing one
// under a running session -- it is ended, and the next thing said to the session
// starts it in the new place.
// directory is settled when the process is spawned, so it is ended and the next
// thing said to the session starts it in the new place.
Text(
"Moving stops the session's process. It starts again in the new directory " +
"with the next message, or with Start.",
@@ -255,6 +257,44 @@ fun SessionSettingsDialog(
style = MaterialTheme.typography.bodySmall,
)
}
Spacer(Modifier.height(8.dp))
Row(
verticalAlignment = Alignment.CenterVertically,
modifier = Modifier.fillMaxWidth(),
) {
Text("Transcript", modifier = Modifier.weight(1f))
// The size is what the button discards, and the unknown state is drawn rather
// than guessed: a spinner while the directory is being measured, and words when
// there is nothing there, because "nothing cached" and "0 B" read as different
// claims.
when {
cachedBytes == null ->
CircularProgressIndicator(
modifier = Modifier.width(16.dp).height(16.dp),
strokeWidth = 2.dp,
)
else ->
Text(
humanSize(cachedBytes)?.let { "$it cached" } ?: "nothing cached",
style = MaterialTheme.typography.bodySmall,
color = MaterialTheme.colorScheme.onSurfaceVariant,
)
}
Spacer(Modifier.width(12.dp))
// Enabled whether or not anything is cached: "what I see disagrees with the
// machine" is a state an empty cache can be in too, and a control that comes
// and goes makes its own presence the signal.
TextButton(onClick = onReload) { Text("Reload") }
}
// Captioned, unlike the controls above it, for the same reason Move is: what it
// costs is not visible, and neither is the case it exists for.
Text(
"Reload throws away this phone's copy and fetches the transcript from the " +
"server again. Use it when what is shown here disagrees with the file " +
"on the machine.",
style = MaterialTheme.typography.bodySmall,
color = MaterialTheme.colorScheme.onSurfaceVariant,
)
error?.let {
Spacer(Modifier.height(8.dp))
Text(
@@ -279,8 +319,8 @@ fun SessionSettingsDialog(
}
}
},
// Disabled rather than absent while there is nothing to save: a button that comes and
// goes makes its own presence the signal, and its absence cannot say why.
// Disabled rather than absent while there is nothing to save: a button that comes and goes
// makes its own presence the signal, and its absence cannot say why.
confirmButton = {
TextButton(onClick = { save() }, enabled = changed && !saving) {
Text(if (saving) "Saving..." else "Save")
app/androidApp/src/main/kotlin/com/example/aiapp/SessionUsageBar.kt
+34 -44
View File
@@ -34,20 +34,19 @@ sealed class SessionUsage {
/**
* This machine meters nothing, so there is no window to show.
*
* Separate from [Unavailable], and the distinction is the whole point: a session on `echo` or
* on a local llama.cpp has no paid quota at all, which is a fact about how it was set up and
* not a failure to find something out. The backend never asks such a machine, so it returns no
* snapshot for it -- and reading that silence as "couldn't find out" is exactly the mistake of
* answering with the nearest available word. Drawn as nothing, because there is nothing.
* Separate from [Unavailable], and the distinction is the point: a session on `echo` or on a
* local llama.cpp has no paid quota at all, which is a fact about how it was set up and not a
* failure to find something out. The backend never asks such a machine, and reading that
* silence as "couldn't find out" is answering with the nearest available word.
*/
data object NotMetered : SessionUsage()
/**
* The question could not be answered, and why.
*
* Its own state because "we couldn't find out" and "none of it is used" are the pair that must
* never share an appearance: a bar sitting at zero because a machine is unreachable reads as
* plenty of headroom, which is the opposite of the truth.
* Its own state because "we couldn't find out" and "none of it is used" must never share an
* appearance: a bar sitting at zero because a machine is unreachable reads as plenty of
* headroom.
*/
data class Unavailable(val why: String) : SessionUsage()
}
@@ -59,17 +58,14 @@ private const val REFRESH_MS = 60_000L
* One poll of every machine's limits, and the handle to ask again.
*
* A screen shows this answer in more than one place -- the bar under the session header, the colour
* of the button beside it, and the dialog that button opens -- and each of those used to fetch for
* itself. Two fetches say one thing twice and then disagree about it: the bar's copy can be a whole
* refresh interval old when the dialog opens with a fresh one, so the header read 42% while the
* screen over it read 47%, about a number somebody is deciding on. One feed per screen, and
* [refresh] moves both.
* of the button beside it, and the dialog that button opens -- and each used to fetch for itself.
* Two fetches say one thing twice and then disagree: the bar's copy can be a whole refresh interval
* old when the dialog opens with a fresh one, so the header read 42% while the screen over it read
* 47%.
*/
class UsageFeed(
val snapshots: LoadState<List<UsageSnapshot>>,
/**
* A fetch is outstanding. Only ever true over an answer already shown; see [rememberUsageFeed].
*/
/** A fetch is outstanding. Only ever true over an answer already shown. */
val refreshing: Boolean,
/** Ask the backend again now. The dialog's refresh button; the poll does it on its own. */
val refresh: () -> Unit,
@@ -102,15 +98,15 @@ class UsageFeed(
fun rememberUsageFeed(settings: ServerSettings): UsageFeed {
var snapshots by remember { mutableStateOf<LoadState<List<UsageSnapshot>>>(LoadState.Loading) }
var refreshing by remember { mutableStateOf(true) }
// Bumped to ask again now. The poll below restarts from the new value, so a manual refresh
// also resets the countdown to the next one rather than leaving one due immediately after.
// Bumped to ask again now. The poll below restarts from the new value, so a manual refresh also
// resets the countdown rather than leaving one due immediately after.
var asked by remember { mutableIntStateOf(0) }
LaunchedEffect(asked) {
while (true) {
refreshing = true
// Replaces the answer only once the next one is in hand: dropping back to Loading
// would blank a bar somebody is reading for the length of a round trip, and what was
// on screen is still the last thing the machine actually said.
// Replaces the answer only once the next one is in hand: dropping back to Loading would
// blank a bar somebody is reading for the length of a round trip, and what was on
// screen is still the last thing the machine actually said.
snapshots =
try {
LoadState.Loaded(withContext(Dispatchers.IO) { fetchUsage(settings) })
@@ -130,13 +126,11 @@ fun rememberUsageFeed(settings: ServerSettings): UsageFeed {
* Worst rather than the five-hour one, because the button it colours opens *all* of them, and a
* blue icon over a weekly quota at 97% would be the interface answering a question nobody asked.
* Taken over however many windows came back rather than the three Claude sends today -- the backend
* deliberately passes windows it does not recognise straight through, so a fourth one is a thing
* that happens rather than a thing to notice later.
* passes windows it does not recognise straight through.
*
* Every state that is not a measurement takes the ordinary control colour instead. That is the
* point where colour stops being able to help: blue is the low end of a scale here, so colouring an
* unknown blue would say "measured, and fine" about a machine nobody could reach. The dialog behind
* the button is where those say, in words, which one they are.
* unknown blue would say "measured, and fine" about a machine nobody could reach.
*/
@Composable
fun usageGlyphColour(usage: SessionUsage): Color =
@@ -154,18 +148,17 @@ fun usageGlyphColour(usage: SessionUsage): Color =
* going, and it was a screen away from the place that decision gets made. It reports on this
* session's machine alone -- the dialog is still where every machine is compared.
*
* What it shows is the paid service's own metering, fetched from the machine that holds the
* account. It is never derived from what this app has watched go past: the transcript's token
* counts are a different quantity, measured differently, and a bar shaped like a quota gauge built
* out of them would be a guess wearing a measurement's clothes.
* What it shows is the paid service's own metering, never derived from what this app has watched go
* past: the transcript's token counts are a different quantity, measured differently, and a bar
* built out of them would be a guess wearing a measurement's clothes.
*/
@Composable
fun SessionUsageBar(usage: SessionUsage, modifier: Modifier = Modifier) {
DebugStats.count("usage bar recomposed")
// The countdown moves even when the numbers do not, so it is driven by a clock of its own
// rather than recomputed at draw time: a percentage that comes back unchanged is an equal
// value, Compose skips the recomposition, and a "left" that only ticked when the quota
// happened to move would sit at a stale figure for hours.
// value, Compose skips the recomposition, and a "left" that only ticked when the quota moved
// would sit at a stale figure for hours.
var now by remember { mutableStateOf(OffsetDateTime.now()) }
LaunchedEffect(Unit) {
while (true) {
@@ -174,15 +167,14 @@ fun SessionUsageBar(usage: SessionUsage, modifier: Modifier = Modifier) {
}
}
// Nothing at all for a session that meters nothing: a row saying "unknown" there would
// report a problem about a setup somebody chose, on every screen, forever.
// Nothing at all for a session that meters nothing: a row saying "unknown" there would report
// a problem about a setup somebody chose, on every screen, forever.
//
// And nothing while the first fetch is out, which is not the same kind of silence. A
// request in flight is not a state to report -- and the session that meters nothing is
// exactly the one this cannot yet tell apart, so "5-hour usage: checking" appeared under
// an echo session for half a second and was then taken away. A row that has to be
// withdrawn is worse than one that arrives late, and this is the only state here whose
// wrongness is a matter of timing rather than of fact.
// And nothing while the first fetch is out, which is a different silence. A request in flight
// is not a state to report -- and the session that meters nothing is exactly the one this
// cannot yet tell apart, so "5-hour usage: checking" appeared under an echo session for half a
// second and was then taken away. A row that has to be withdrawn is worse than one that
// arrives late.
if (usage is SessionUsage.NotMetered || usage is SessionUsage.Waiting) {
return
}
@@ -239,9 +231,8 @@ private fun UsageNote(text: String) {
* The percentage on its own does not answer the question it gets asked, which is whether to start
* something now; 80% with twenty minutes to go and 80% with four hours to go are opposite answers.
*
* The window's end has two missing cases and they are worded differently on purpose; see
* [WindowEnd]. A window that is not running gets the percentage and nothing else, because there is
* no countdown to report and inventing one would be the same fault as inventing the number.
* The window's end has two missing cases, worded differently on purpose; see [WindowEnd]. A window
* that is not running gets the percentage and nothing else.
*/
private fun fiveHourLabel(window: UsageWindow, now: OffsetDateTime): String {
val percent = "${window.percent.toInt()}%"
@@ -265,8 +256,7 @@ private fun fiveHourLabel(window: UsageWindow, now: OffsetDateTime): String {
* account and, while a test has one set, an echo session's invented one -- and a snapshot is one
* service on one machine.
*
* Every way of having *failed* to get numbers is [SessionUsage.Unavailable] with the reason in it:
* a machine nobody logged into, one that could not be reached, a snapshot that came back empty.
* Every way of having *failed* to get numbers is [SessionUsage.Unavailable] with the reason in it.
* None of them may look like zero, and none may look like [SessionUsage.NotMetered], which is the
* machine having no quota rather than the question going unanswered.
*/
app/androidApp/src/main/kotlin/com/example/aiapp/SettingsScreen.kt
+14 -19
View File
@@ -47,15 +47,14 @@ fun SettingsScreen(
val context = LocalContext.current
var host by remember { mutableStateOf(existing?.host ?: "10.66.0.1") }
var port by remember { mutableStateOf((existing?.port ?: 8443).toString()) }
// Never pre-filled from the stored token: this screen shouldn't be a
// way to read the credential back off the device.
// Never pre-filled from the stored token: this screen shouldn't be a way to read the credential
// back off the device.
var token by remember { mutableStateOf("") }
var error by remember { mutableStateOf<String?>(null) }
val scanLauncher =
rememberLauncherForActivityResult(ScanContract()) { result: ScanIntentResult ->
// Null contents means the user backed out of the scanner -- not an
// error, so nothing to report.
// Null contents means the user backed out of the scanner -- not an error.
val contents = result.contents ?: return@rememberLauncherForActivityResult
val settings = parseEnrollmentUri(contents.toUri())
if (settings == null) {
@@ -83,8 +82,8 @@ fun SettingsScreen(
// left-pointing arrow at the right edge, aimed across the title it sits beside.
//
// Absent rather than disabled on first run, which is the one place this app lets a
// control come and go: there is no screen underneath yet, so a Back here would not be
// a capability being withheld but a promise it could not keep.
// control come and go: there is no screen underneath yet, so a Back here would not be a
// capability being withheld but a promise it could not keep.
if (onBack != null) {
GlyphButton(BACK_GLYPH, "Back", onBack)
Spacer(Modifier.width(GLYPH_BUTTON_MARGIN))
@@ -106,14 +105,11 @@ fun SettingsScreen(
OutlinedButton(
onClick = {
// Hold the camera permission before the scanner starts.
// Letting its activity ask on our behalf is what the
// library does by default, and it opens the camera without
// waiting for the answer: the first-ever scan comes up as
// a live preview with "Sorry, the Android camera
// encountered a problem" over it, and works on the second
// try. Nothing is wrong with the camera, so nothing should
// say there is.
// Hold the camera permission before the scanner starts. Letting its activity ask on
// our behalf is what the library does by default, and it opens the camera without
// waiting for the answer: the first-ever scan comes up as a live preview with
// "Sorry, the Android camera encountered a problem" over it, and works on the
// second try.
if (
context.checkSelfPermission(Manifest.permission.CAMERA) ==
PackageManager.PERMISSION_GRANTED
@@ -187,11 +183,10 @@ fun SettingsScreen(
* just been granted.
*
* MIXED_SCAN is the load-bearing part: ZXing otherwise looks only for a dark code on a light
* ground, and ai-server's QR is block characters in the terminal's foreground colour, so on a
* dark-themed terminal it comes out as a photographic negative the scanner silently never matches.
* Which way round it renders is the terminal's business, not something this app should depend on.
* The mixed decoder alternates normal and inverted frames, costing half the frame rate at each
* polarity and nothing else.
* ground, and ai-server's QR is block characters in the terminal's foreground colour, so on a dark-
* themed terminal it comes out as a photographic negative the scanner silently never matches. The
* mixed decoder alternates normal and inverted frames, costing half the frame rate at each
* polarity.
*/
private fun enrollmentScanOptions(): ScanOptions =
ScanOptions()
app/androidApp/src/main/kotlin/com/example/aiapp/SetupsScreen.kt
+14 -19
View File
@@ -58,8 +58,8 @@ fun SetupsScreen(settings: ServerSettings, reloadToken: Int) {
LaunchedEffect(reloadToken) { reload() }
Column(Modifier.fillMaxSize().padding(16.dp)) {
// The heading and Back are the tab row's now; adding a machine is this tab's own work
// and stays with the list it adds to.
// The heading and Back are the tab row's now; adding a machine is this tab's own work and
// stays with the list it adds to.
Row(verticalAlignment = Alignment.CenterVertically, modifier = Modifier.fillMaxWidth()) {
TextButton(onClick = { adding = true }) { Text("Add machine") }
}
@@ -200,9 +200,8 @@ private fun SetupCard(
Column(Modifier.padding(12.dp)) {
Text(setup.name, style = MaterialTheme.typography.titleSmall)
Text(
// Not "this machine": the seeded setup is *called* that,
// and the card read "this machine / this machine". The
// line has to say something the name cannot also be.
// Not "this machine": the seeded setup is *called* that, and the card read "this
// machine / this machine".
setup.address ?: "runs where the backend does",
style = MaterialTheme.typography.bodySmall,
color = MaterialTheme.colorScheme.onSurfaceVariant,
@@ -277,9 +276,8 @@ private fun AddSetupDialog(
OutlinedTextField(
value = address,
onValueChange = { address = it },
// Just the shape. What a blank one means is said once, in the text above
// this form -- repeating it here wrapped the label onto a second line and
// made this field taller than the two beside it for no information.
// Just the shape. What a blank one means is said once, in the text above this
// form -- repeating it here wrapped the label onto a second line.
label = { Text("user@host[:port]") },
singleLine = true,
)
@@ -290,8 +288,7 @@ private fun AddSetupDialog(
singleLine = true,
)
// Where a file attached from the phone lands on that machine. Blank means the
// session's own directory, which is what most people want and what needs no
// path typed on a phone.
// session's own directory, which is what most people want.
OutlinedTextField(
value = attachmentsDir,
onValueChange = { attachmentsDir = it },
@@ -319,9 +316,8 @@ private fun AddSetupDialog(
},
dismissButton = {
Row {
// Tried before saving, so a wrong address or an
// unauthorised key is caught while this form is still on
// screen rather than at the first spawn.
// Tried before saving, so a wrong address or an unauthorised key is caught while
// this form is still on screen rather than at the first spawn.
TextButton(
enabled = !testing,
onClick = {
@@ -387,14 +383,13 @@ private fun RenameDialog(setup: Setup, onDismiss: () -> Unit, onRename: (String)
/**
* Splits `user@host:port` into its two halves, with the port left null when none was typed.
*
* One field rather than two because that is how an address is written and read everywhere else --
* and because a port that is almost always 22 does not deserve a box of its own on a phone
* keyboard. Null rather than 22: the backend already decides the default, and writing 22 here would
* put a second answer to that question in a second place.
* One field rather than two because that is how an address is written and read everywhere else, and
* because a port that is almost always 22 does not deserve a box of its own on a phone keyboard.
* Null rather than 22: the backend already decides the default.
*
* A colon only means "port" when it can. A bracketed IPv6 literal is unwrapped as ssh writes it,
* `[::1]:22`; a bare `::1` keeps every colon, because an address with several is an address, not an
* address and a port. So the rule is: brackets, or exactly one colon followed by digits.
* `[::1]:22`; a bare `::1` keeps every colon. So the rule is: brackets, or exactly one colon
* followed by digits.
*/
private fun splitHostAndPort(typed: String): Pair<String, Int?> {
if (typed.startsWith("[")) {
app/androidApp/src/main/kotlin/com/example/aiapp/Share.kt
+1 -1
View File
@@ -9,7 +9,7 @@ import androidx.core.content.IntentCompat
*
* Held as the URIs rather than uploaded on arrival, because an upload belongs to a session and the
* share arrives before anyone has said which. [serial] makes two shares of the same thing two
* requests, for the reason [SessionOpenRequest] carries one: equal values would not recompose.
* requests, for the reason [SessionOpenRequest] carries one.
*/
data class ShareRequest(val uris: List<Uri>, val text: String?, val serial: Int)
app/androidApp/src/main/kotlin/com/example/aiapp/Sizes.kt
+6 -6
View File
@@ -3,13 +3,13 @@ package com.example.aiapp
/**
* A byte count at the coarsest unit that still says something, so rows stay comparable.
*
* Null at zero and below, because the two screens that ask disagree about what nothing means and
* only the caller knows: a transcript of no bytes is a measurement that has not happened, and is
* left off the row; a file of no bytes is a file with nothing in it, and the explorer says `0 B`
* rather than leaving a gap the reader would have to interpret.
* Null at zero and below, because the screens that ask disagree about what nothing means and only
* the caller knows: a transcript of no bytes is a measurement that has not happened; a file of no
* bytes is a file with nothing in it, and the explorer says `0 B`; a session with no cached
* transcript says "nothing cached", because a figure of none would read as a measurement.
*
* Its own file rather than the import screen's, where it started: two screens now say a size, and a
* second copy of these thresholds is how one list comes to call 4 kB what the other calls 4096 B.
* Its own file rather than the import screen's, where it started: three screens now say a size, and
* a second copy of these thresholds is how one list comes to call 4 kB what the other calls 4096 B.
*/
fun humanSize(bytes: Long): String? =
when {
app/androidApp/src/main/kotlin/com/example/aiapp/SpawnScreen.kt
+32 -46
View File
@@ -37,7 +37,7 @@ import kotlinx.coroutines.withContext
* The spawn screen: what to run, where to run it, and the per-kind fields.
*
* Providers and hosts both come from the server, so adding either to its config.ron shows up here
* with no app rebuild -- and because they are independent, any provider can be sent to any host.
* with no app rebuild.
*/
@Composable
fun SpawnScreen(
@@ -46,29 +46,24 @@ fun SpawnScreen(
onBack: () -> Unit,
) {
val scope = rememberCoroutineScope()
// What the form is made of, and whether we have it yet. A failure here
// is not the same as a server with nothing to offer, so it must not
// reach the pickers as empty lists -- see LoadState.
// What the form is made of, and whether we have it yet. A failure here is not the same as a
// server with nothing to offer, so it must not reach the pickers as empty lists.
var options by remember { mutableStateOf<LoadState<List<Setup>>>(LoadState.Loading) }
// Setup first, then one of its providers. Choosing a setup can
// invalidate the provider, so the provider is stored by name and
// resolved against the current setup rather than held as an object
// that could outlive the list it came from.
// Setup first, then one of its providers. Choosing a setup can invalidate the provider, so the
// provider is stored by name and resolved against the current setup rather than held as an
// object that could outlive the list it came from.
var setupName by remember { mutableStateOf<String?>(null) }
var providerName by remember { mutableStateOf<String?>(null) }
var title by remember { mutableStateOf("") }
var model by remember { mutableStateOf("") }
var cwd by remember { mutableStateOf("") }
// "auto" rather than "manual": on a phone every ask is a round trip to
// a question card, and answering "allow Bash?" dozens of times per task
// is what this app exists to avoid. Manual stays one tap away for a
// session that warrants it.
// "auto" rather than "manual": on a phone every ask is a round trip to a question card, and
// answering "allow Bash?" dozens of times per task is what this app exists to avoid.
var permissionMode by remember { mutableStateOf("auto") }
var busy by remember { mutableStateOf(false) }
// Only the spawn's own failure. The fetch's lives in `options`: this
// one leaves a filled-in form worth keeping, and that one leaves
// nothing to fill in.
// Only the spawn's own failure. The fetch's lives in `options`: this one leaves a filled-in
// form worth keeping, and that one leaves nothing to fill in.
var spawnError by remember { mutableStateOf<String?>(null) }
// The models on the *chosen machine*, for a llama provider to choose between. Kept separate
// from the setups: a Claude session needs none, so failing to list them must not stop the
@@ -103,10 +98,9 @@ fun SpawnScreen(
}
Spacer(Modifier.height(16.dp))
// Nothing below is fillable until the options are here, and a
// failure to fetch them leaves no form worth showing -- so this
// reports and stops, rather than offering empty pickers under an
// error message.
// Nothing below is fillable until the options are here, and a failure to fetch them leaves
// no form worth showing -- so this reports and stops, rather than offering empty pickers
// under an error message.
val setups =
when (val state = options) {
is LoadState.Loading -> {
@@ -132,10 +126,9 @@ fun SpawnScreen(
.getOrDefault(emptyList())
}
val current = setup?.providers?.firstOrNull { it.name == providerName }
// Only the Claude CLI has models, a working directory and
// permission modes; keying the extra fields on the kind rather
// than the provider name keeps a second Claude provider from
// needing anything here.
// Only the Claude CLI has models, a working directory and permission modes; keying the
// extra fields on the kind rather than the provider name keeps a second Claude provider
// from needing anything here.
val isClaude = current?.kind == "claude_cli"
val isLlama = current?.kind == "llama_cpp"
@@ -146,9 +139,9 @@ fun SpawnScreen(
selected = setupName,
onSelect = { name ->
setupName = name
// The provider list changes with the machine, so a name
// carried over from the previous one would be a selection
// that isn't in the picker. Take that machine's first.
// The provider list changes with the machine, so a name carried over from the
// previous one would be a selection that isn't in the picker. Take that machine's
// first.
providerName =
setups.firstOrNull { it.name == name }?.providers?.firstOrNull()?.name
},
@@ -159,13 +152,13 @@ fun SpawnScreen(
style = MaterialTheme.typography.bodySmall,
color = MaterialTheme.colorScheme.onSurfaceVariant,
)
// The address belongs to the setup above it, not to the
// provider label below; without this they read as one block.
// The address belongs to the setup above it, not to the provider label below; without
// this they read as one block.
Spacer(Modifier.height(8.dp))
}
// Only what this machine actually has. A setup with none says so
// rather than showing an empty row that reads as a failure.
// Only what this machine actually has. A setup with none says so rather than showing an
// empty row that reads as a failure.
if (setup != null && setup.providers.isEmpty()) {
Text(
"\"${setup.name}\" has no providers configured.",
@@ -193,9 +186,8 @@ fun SpawnScreen(
if (isLlama) {
// A llama session names one of the models on the machine it will run on, so the
// choice is that list rather than free text -- there is nothing sensible to type
// here, and a name that is not on that machine's disk is a session that cannot
// start.
// choice is that list rather than free text -- a name that is not on that machine's
// disk is a session that cannot start.
if (models.isEmpty()) {
Text(
"No models on ${setup?.name ?: "this machine"}. The Models screen downloads " +
@@ -206,9 +198,8 @@ fun SpawnScreen(
} else {
ChipGroup(
label = "Model",
// The file, not the whole key: the repository is the
// same for every quantisation of a model, so the file
// name is what tells two of them apart.
// The file, not the whole key: the repository is the same for every
// quantisation of a model, so the file name is what tells two of them apart.
options = models.map { it.file },
selected = models.firstOrNull { it.key == modelKey }?.file,
onSelect = { file -> modelKey = models.first { it.file == file }.key },
@@ -290,13 +281,9 @@ fun SpawnScreen(
withContext(Dispatchers.IO) {
spawnSession(
settings,
// The id, not the label: labels are
// editable and the server resolves by
// id.
// Non-null here: `chosen` came from
// `setup`'s own provider list, so
// reaching this point proves there was
// a setup to take it from.
// The id, not the label: labels are editable and the server
// resolves by id. Non-null here, since `chosen` came from
// `setup`'s own provider list.
setup = setup.id,
provider = chosen.name,
title = title.trim(),
@@ -304,9 +291,8 @@ fun SpawnScreen(
if (isLlama) modelKey else model.trim().takeIf { isClaude },
cwd = cwd.trim().takeIf { isClaude },
permissionMode = permissionMode.takeIf { isClaude },
// Sent only when set, so blank means
// "whatever llama.cpp does by default"
// rather than a zero.
// Sent only when set, so blank means "whatever llama.cpp does
// by default" rather than a zero.
params =
buildMap {
if (isLlama) {
app/androidApp/src/main/kotlin/com/example/aiapp/Sse.kt
+9 -13
View File
@@ -17,14 +17,13 @@ const val RECONNECT_DELAY_MS = 1500L
* One server-sent-events connection, framed.
*
* The framing is the part worth having once: `data:` and `event:` lines accumulate until a blank
* line ends the frame, comments (keep-alives) start with `:`, and a frame is either named with no
* payload or a payload with no name. Two screens follow two different streams — a session's
* transcript and what a machine's import list is doing — and neither should be re-deriving that.
* line ends the frame, comments start with `:`, and a frame is either named with no payload or a
* payload with no name. Two screens follow two different streams and neither should re-derive that.
*
* Blocking: [run] occupies its thread until the stream ends. [close], from any thread, is the
* cancellation path — it disconnects the socket, which unblocks the read, and [run] then returns
* rather than throwing, so a deliberate close is not reported as a connection error. Reconnecting
* belongs to the caller, which is the only one that knows where to resume from.
* cancellation path -- it disconnects the socket, which unblocks the read, and [run] then returns
* rather than throwing. Reconnecting belongs to the caller, which is the only one that knows where
* to resume from.
*/
class Sse(private val settings: ServerSettings) {
@Volatile private var connection: HttpURLConnection? = null
@@ -38,19 +37,16 @@ class Sse(private val settings: ServerSettings) {
/**
* Follows the stream at [path], handing each frame to [onFrame] as its name (null for an
* ordinary data frame) and its payload. The path is given here rather than at construction
* because a caller that reconnects usually resumes from somewhere new -- a cursor it has
* advanced past -- and that lives in the query string.
* because a caller that reconnects usually resumes from somewhere new.
*
* [onOpen] fires once the server has accepted the connection. That is the measured moment the
* stream is live, and the only honest thing to clear a previous failure on: clearing on the
* first *event* instead left an idle stream displaying a connection error it had already
* recovered from, indefinitely.
* first *event* instead left an idle stream displaying an error it had already recovered from.
*/
fun run(path: String, onOpen: () -> Unit, onFrame: (name: String?, data: String) -> Unit) {
// Opening is inside the try, not before it. Everything this method can fail at owes the
// caller the same kind of failure -- both callers retry an [ApiException] and let anything
// else reach the top of the app -- and a connection that could not even be constructed
// used to escape as a raw `IOException` from a line no `catch` covered.
// caller the same kind of failure, and a connection that could not even be constructed used
// to escape as a raw `IOException` from a line no `catch` covered.
var connection: HttpURLConnection? = null
try {
connection =
app/androidApp/src/main/kotlin/com/example/aiapp/Theme.kt
+45 -64
View File
@@ -44,16 +44,14 @@ private object Mocha {
*
* Copied from dev-updater rather than shared, which is a deliberate line: wg-app-link is the *link*
* -- the tunnel, the pinned CA, enrollment -- and a palette is not that. The two apps looking alike
* is a preference, not a contract, and the moment one wants a different accent the shared version
* becomes a thing to fight rather than a thing to use.
* is a preference, not a contract.
*
* The mapping that matters is the surface ladder. Mocha names its darks in order -- Crust, Mantle,
* Base, Surface 0, Surface 1 -- and Material asks for the same thing under different names, so the
* page is Base, a component's outlined card stays Base beside it, and a project's card is Surface
* 0: one visible step up, which is the whole of what the nesting has to say.
* Base, Surface 0, Surface 1 -- so the page is Base, a component's outlined card stays Base beside
* it, and a project's card is Surface 0: one visible step up, which is the whole of what the
* nesting has to say.
*
* Accents on this palette are light, so anything filled with one takes Crust for its text rather
* than the near-white the roles default to.
* Accents on this palette are light, so anything filled with one takes Crust for its text.
*/
val AiAppColors =
darkColorScheme(
@@ -94,10 +92,8 @@ val AiAppColors =
* What a session is doing, said in colour.
*
* Here rather than beside each screen that shows a status. These were separate literals in two
* other files -- an amber, a green and a red picked off Material's defaults -- so the same state
* was a slightly different colour depending which screen you looked at, and none of them belonged
* to this palette at all. A colour that carries meaning is part of the scheme, not a value typed
* where it happened to be needed.
* other files, so the same state was a slightly different colour depending which screen you looked
* at. A colour that carries meaning is part of the scheme, not a value typed where it was needed.
*/
val runningColor: Color
@Composable get() = Mocha.Green
@@ -107,7 +103,7 @@ val runningColor: Color
*
* The scheme's error colour, and deliberately not "the same red as a destructive button" even
* though it is the same red. They are the same red for different reasons, and a state is not an
* action -- nothing here is a button.
* action.
*/
val failedColor: Color
@Composable get() = MaterialTheme.colorScheme.error
@@ -116,10 +112,9 @@ val failedColor: Color
* About the session rather than about the task: a command, and the compaction one of them starts.
*
* Its own colour because it is its own kind of work. Everything else a session does is progress
* through what was asked of it; this is the session acting on itself -- rewriting what it
* remembers, taking a new name -- and none of it appears in the transcript as an answer to
* anything. A reader who has learned that blue means "not stuck, but not replying to you either"
* has learned the thing that distinguishes it from a session that has hung.
* through what was asked of it; this is the session acting on itself, and none of it appears in the
* transcript as an answer to anything. A reader who has learned that blue means "not stuck, but not
* replying to you either" has learned what distinguishes it from a session that has hung.
*/
val commandColor: Color
@Composable get() = Mocha.Blue
@@ -128,10 +123,9 @@ val commandColor: Color
* A clear: the conversation taken out of what the session is given.
*
* Red because of what it does, not because anything went wrong -- somebody asked for this, and a
* deliberate choice is not a problem to report. It is the same red as [failedColor] and [stopColor]
* for a third reason, which is worth naming rather than collapsing: this is neither a fault nor a
* button, it is the mark left where something was taken away. The reader never has to tell the
* three apart, because no two of them can appear as the same kind of thing.
* deliberate choice is not a problem to report. The same red as [failedColor] and [stopColor] for a
* third reason: this is neither a fault nor a button, it is the mark left where something was taken
* away. No two of the three can appear as the same kind of thing.
*/
val clearedColor: Color
@Composable get() = Mocha.Red
@@ -148,9 +142,9 @@ val warningColor: Color
* The fill of a progress bar that is only reporting how far along something is.
*
* Blue because a bar like this reports a quantity rather than a verdict, and the scheme's primary
* made it the loudest thing on a screen the reader opened to do something else. A download, or a
* compaction, has no limit to be near: it finishes. Only a bar measuring a *quota* escalates, and
* that one is [quotaColor].
* made it the loudest thing on a screen the reader opened to do something else. A download has no
* limit to be near: it finishes. Only a bar measuring a *quota* escalates -- that one is
* [quotaColor].
*/
val progressColor: Color
@Composable get() = Mocha.Blue
@@ -158,15 +152,13 @@ val progressColor: Color
/**
* The fill of a bar measuring how much of a quota is gone: blue, then yellow, then red.
*
* One function rather than the same `when` written beside each bar, because the whole point of
* colouring by consequence is that the reader learns the step once -- two bars showing the same 80%
* in different colours teaches nothing except that the colour cannot be trusted. It reads as a
* difference in degree, which is all colour can carry: the states that differ in *kind* from this
* -- a window nobody could read, a machine that meters nothing -- are said in words elsewhere,
* because a reader has no way to tell those from an ordinary low number by colour alone.
* One function rather than the same `when` written beside each bar, because the point of colouring
* by consequence is that the reader learns the step once. It reads as a difference in degree, which
* is all colour can carry: the states that differ in *kind* -- a window nobody could read, a
* machine that meters nothing -- are said in words elsewhere.
*
* [percent] is the API's own 0-100 rather than a fraction, so callers pass what the server sent
* without each converting it first and one of them getting it wrong by a factor of a hundred.
* without one of them getting it wrong by a factor of a hundred.
*/
@Composable
fun quotaColor(percent: Double): Color =
@@ -185,13 +177,11 @@ private const val OVER_LIMIT_PERCENT = 90.0
/**
* The surface verbatim text sits on: a command, a tool's output, a code block in a reply.
*
* The darkest value in the palette rather than a step up from the page, and that is the whole point
* -- everything else on this screen is somebody's prose, and this is what a machine was handed and
* The darkest value in the palette rather than a step up from the page, and that is the point --
* everything else on this screen is somebody's prose, and this is what a machine was handed and
* what it said back, character for character. Crust sits *below* Base, so the same colour reads as
* one clear step down both on the page, where a reply is drawn, and on a card, where a tool call
* is; a tint chosen upwards has to be picked twice and still collides with the card it lands on.
* The renderer's default code background was `surfaceVariant`, which is exactly a card's own fill
* -- so a code block inside a tool call had no background at all.
* one clear step down both on the page and on a card; a tint chosen upwards has to be picked twice
* and still collides with the card it lands on.
*
* One colour for all three, so "this is verbatim" is learnable once.
*/
@@ -202,11 +192,10 @@ val rawSurface: Color
* Catppuccin Mocha as the highlighter's palette; see [SyntaxPalette].
*
* Here with the rest of the palette rather than beside the code that highlights: the colours a
* fence is drawn in are the same accents every other coloured thing in the app already uses, and
* splitting them out would make code the one surface whose palette came from somewhere else.
* fence is drawn in are the same accents every other coloured thing already uses.
*
* Not a composable, because [highlight] runs off the drawing thread; these colours never vary with
* the theme.
* Not a composable, because [highlight] runs off the drawing thread; these never vary with the
* theme.
*/
fun catppuccinSyntax(): SyntaxPalette =
SyntaxPalette(
@@ -227,8 +216,7 @@ fun catppuccinSyntax(): SyntaxPalette =
* already made for every other blue on the screen.
*
* Mocha's bright half is the same accents as its normal half -- only the two greys differ -- which
* is upstream's choice and not an omission here. A program that uses bright red to mean something
* other than red is relying on a distinction its own terminal may not draw either.
* is upstream's choice and not an omission here.
*
* The background is [rawSurface] because that is what a tool's output is drawn on, and reverse
* video needs to know what it is reversing against.
@@ -263,14 +251,12 @@ fun ansiPalette(): AnsiPalette =
*
* The default is `primary` at 40% alpha, which is a tint of whatever is behind it -- and this app
* draws text on surfaces two full steps apart. Over a reply, on Base, that reads clearly. Over a
* code block or a tool's output, on Crust, the same 40% composites to a barely-there smudge, so
* selecting a line of code looks like nothing happened even though the selection is there and
* copies correctly.
* code block, on Crust, the same 40% composites to a barely-there smudge, so selecting a line of
* code looks like nothing happened even though it copies correctly.
*
* Fixed and stronger, because "this is selected" is a meaning rather than decoration: a colour that
* means something must carry its own contrast instead of borrowing it from the surface it happens
* to land on. Raised only as far as it takes to read on the darkest of them -- past this the fill
* starts competing with the syntax colours it sits behind, which are the thing being read.
* Fixed and stronger, because "this is selected" is a meaning rather than decoration. Raised only
* as far as it takes to read on the darkest of them -- past this the fill starts competing with the
* syntax colours it sits behind.
*/
val AiAppSelectionColors =
TextSelectionColors(
@@ -288,11 +274,10 @@ val linkColor: Color
* A list's markers: the bullets and numbers down its left edge.
*
* The scheme's secondary accent rather than the text colour, because a marker is structure rather
* than words: coloured, the items of a list can be counted without reading them, and a nested list
* reads as a shape before it reads as text. Lavender is not one of the colours that mean something
* here -- green, red, peach and yellow are states and actions -- and it is the same at every depth,
* since depth is said by the glyph and the indent; a colour per depth would make a difference in
* degree look like one in kind.
* than words: coloured, the items of a list can be counted without reading them. Lavender is not
* one of the colours that mean something here, and it is the same at every depth, since depth is
* said by the glyph and the indent -- a colour per depth would make a difference in degree look
* like one in kind.
*/
val listMarkerColor: Color
@Composable get() = Mocha.Lavender
@@ -305,11 +290,9 @@ val overLimitColor: Color
* The composer's buttons, coloured by what pressing one does rather than by where it sits.
*
* Green makes something happen now, blue makes it happen later, orange takes back what is in
* flight, red ends the process. The near-collisions with the states above are deliberate and worth
* naming rather than collapsing: [runningColor] is green because a session is working,
* [failedColor] is red because one fell over, [awaitingColor] is the same orange because a session
* is waiting on somebody -- those are *states*, and these are *actions*. A reader never has to tell
* them apart, because nothing here is a state and nothing there is pressable.
* flight, red ends the process. The near-collisions with the states above are deliberate: those are
* *states*, and these are *actions*. A reader never has to tell them apart, because nothing here is
* a state and nothing there is pressable.
*/
val sendColor: Color
@Composable get() = Mocha.Green
@@ -322,9 +305,8 @@ val queueColor: Color
* Interrupting the running turn: the work stops and the session stays.
*
* Orange rather than red because of how much it takes: only what is in flight. The process is still
* there holding the conversation, and the next message starts a turn as though nothing had
* happened. Red is spent on [stopColor], which is the same button in the same place when what it
* would end is the session's process.
* there holding the conversation. Red is spent on [stopColor], which is the same button in the same
* place when what it would end is the session's process.
*/
val pauseColor: Color
@Composable get() = Mocha.Peach
@@ -347,8 +329,7 @@ val startColor: Color
*
* The content colour is stated here beside the fill rather than inherited. A semantic colour has to
* carry its own contrast: these fills are fixed whatever the surface under them does, so the theme
* will not change to rescue a foreground that stops being readable on one of them. Crust is what
* every accent on this palette takes, which is the same reason `onPrimary` is Crust above.
* will not change to rescue a foreground that stops being readable on one of them.
*/
@Composable
fun actionButtonColors(fill: Color): ButtonColors =
app/androidApp/src/main/kotlin/com/example/aiapp/ToolInput.kt
+16 -17
View File
@@ -16,11 +16,10 @@ import org.json.JSONObject
/**
* A tool call's input, read rather than dumped.
*
* Every tool's input arrives as JSON, and showing it raw makes the reader parse `{"command":"…",
* "timeout":120000}` themselves to find the one line they care about. So the fields that carry the
* meaning are pulled out -- the command a shell will run, what it is for, how long it may take --
* and anything left over is still shown, because dropping a field would be claiming the tool has no
* other input when it might.
* Every tool's input arrives as JSON, and showing it raw makes the reader parse
* `{"command":"…","timeout":120000}` themselves to find the one line they care about. So the fields
* that carry the meaning are pulled out, and anything left over is still shown, because dropping a
* field would be claiming the tool has no other input when it might.
*/
data class ToolInput(
/** The thing that will actually be run or read, if this tool has one. */
@@ -30,8 +29,8 @@ data class ToolInput(
/** The tool's own one-line summary, when it wrote one. */
val description: String?,
/**
* How long the call may take, in the largest units it fits ([formatMillis]). Shown apart
* because it is a limit on the call rather than part of what the call does.
* How long the call may take, in the largest units it fits. Shown apart because it is a limit
* on the call rather than part of what the call does.
*/
val timeout: String?,
/** Everything else, as `name: value` lines. Never dropped. */
@@ -47,7 +46,7 @@ data class ToolInput(
*
* A table rather than a chain of `if`s: adding a tool is a row, and the shape stops any of them
* from being the special case that gets its own code path. Unknown tools fall through to "no
* subject, everything is rest", which is what the card always did.
* subject, everything is rest".
*/
private val SUBJECTS: Map<String, Pair<String, Language?>> =
mapOf(
@@ -68,8 +67,8 @@ fun parseToolInput(tool: String, input: String): ToolInput {
try {
JSONObject(input)
} catch (_: org.json.JSONException) {
// Not an object: older transcripts and some tools send a bare
// string. It is still the input, so it is still shown.
// Not an object: older transcripts and some tools send a bare string. It is still the
// input, so it is still shown.
return ToolInput(
null,
null,
@@ -100,9 +99,9 @@ fun parseToolInput(tool: String, input: String): ToolInput {
/**
* A tool call's input: its subject highlighted, then whatever else it carried.
*
* On the dark surface every verbatim thing in the app sits on -- see [RawBlock]. Drawn as nothing
* at all when the call carried neither, rather than as an empty block: a tinted rectangle with
* nothing in it is a rendering fault, and it is the shape a tool with no input actually has.
* On the dark surface every verbatim thing in the app sits on. Drawn as nothing at all when the
* call carried neither, rather than as an empty block: a tinted rectangle with nothing in it is a
* rendering fault.
*
* The description is *not* here. It is the tool's own prose about what it is doing, so it belongs
* with the reader's text rather than inside the machine's; [ToolCard] draws it above this.
@@ -113,11 +112,11 @@ fun ToolInputView(tool: String, input: String, modifier: Modifier = Modifier) {
if (parsed.subject == null && parsed.rest.isEmpty()) return
RawBlock(modifier) {
parsed.subject?.let { subject ->
// Not wrapped: a wrapped command hides where its arguments end,
// and the long one is the one being read closely.
// Not wrapped: a wrapped command hides where its arguments end, and the long one is the
// one being read closely.
Text(
// Not cached: a tool's subject is one command line, which lexes in microseconds
// -- the cache exists for a fence with two hundred lines in it.
// Not cached: a tool's subject is one command line, which lexes in microseconds --
// the cache exists for a fence with two hundred lines in it.
remember(subject, parsed.language) { highlight(subject, parsed.language) },
style = MaterialTheme.typography.bodySmall,
fontFamily = FontFamily.Monospace,
app/androidApp/src/main/kotlin/com/example/aiapp/ToolRows.kt
+46 -73
View File
@@ -42,14 +42,11 @@ import androidx.compose.ui.unit.dp
* the transcript's own order is what paging and the event stream depend on, and one screen's idea
* of "these belong together" must not reach back into it.
*
* Immutable, and said so, because Compose cannot tell.
*
* A row is a value: it is rebuilt from the transcript rather than edited, and two rows describing
* the same events are equal. Compose infers stability from a class's fields, and a `List` field --
* which several of these carry -- makes it assume the worst, so every composable taking one
* recomposed whenever anything above it did. A page of history landing recomposed all 148 loaded
* rows including the markdown inside them, measured as 701 compositions for 148 rows in one scroll,
* and that is what a page landing costs on top of the fetch itself.
* Immutable, and said so, because Compose cannot tell: a row is rebuilt from the transcript rather
* than edited, and two rows describing the same events are equal. Compose infers stability from a
* class's fields, and a `List` field -- which several of these carry -- makes it assume the worst,
* so a page of history landing recomposed all 148 loaded rows including the markdown inside them,
* measured as 701 compositions for 148 rows in one scroll.
*
* The promise this makes is real and has to stay true: nothing here is mutated after it is built.
*/
@@ -59,16 +56,12 @@ sealed class TranscriptRow {
* This row's identity in the list, which must survive everything that can happen to the row.
*
* The list is keyed by this so that inserting a new message at one end, or a page of history at
* the other, moves the rows and not the reader. That makes it the load-bearing value on this
* screen: when a key changes, the list loses its anchor and the transcript steps under whoever
* is reading it.
* the other, moves the rows and not the reader. When a key changes, the list loses its anchor
* and the transcript steps under whoever is reading it.
*
* A tool row therefore keys on [TranscriptItem.ToolRun.runId] rather than on a sequence number,
* and it is the *same* value whether the run is drawn as one card or as a group. A lone call
* that gains a neighbour becomes a group without changing identity, which is the case a
* seq-based key got wrong: the row the reader was looking at was replaced rather than updated.
* Which value that is belongs to the item ([TranscriptItem.key]), not to a `when` here: a row
* is one item and the item is what knows what it is called.
* and it is the *same* value whether the run is drawn as one card or as a group. Which value
* that is belongs to the item ([TranscriptItem.key]), not to a `when` here.
*/
abstract val key: Any
@@ -76,12 +69,9 @@ sealed class TranscriptRow {
* Where this row starts in the transcript: the sequence number of the oldest event behind it.
*
* Separate from [key], and deliberately so. [key] is the list's identity and is a display
* decision -- a tool row is named after its run, and a run takes its name from whichever call
* was first when it was folded, which changes as pages arrive. A seq is the server's own
* numbering: it is assigned once, never moves, and means the same thing to every device. So
* anything that has to point at a place in the conversation and still find it later -- a saved
* scroll position is the one -- points with this, and anything that has to identify a row
* within one composition uses [key].
* decision; a seq is the server's own numbering, assigned once and meaning the same thing to
* every device. So anything that has to point at a place in the conversation and still find it
* later -- a saved scroll position -- points with this.
*/
abstract val startSeq: Long
@@ -133,8 +123,7 @@ private fun groupRuns(items: List<TranscriptItem>): List<TranscriptRow> {
// Grouped by the run each call says it belongs to, not by adjacency worked out here.
// Adjacency is the same answer most of the time and a worse one at the edges: a call
// arriving next to an existing run, or a page of history arriving in front of one, both
// change which call is *first*, and a group named after its first member is a different
// group every time that happens.
// change which call is *first*.
if (item is TranscriptItem.ToolRun && (run.isEmpty() || run.first().runId == item.runId)) {
run += item
} else {
@@ -152,18 +141,14 @@ private fun groupRuns(items: List<TranscriptItem>): List<TranscriptRow> {
* What says the calls belong together is the surface behind them, which is the one cue rather than
* two half-cues -- rounded to the same corner every other card in the app has, so a group reads as
* one object rather than as a square patch behind round things. The calls sit on it inset by
* [GROUP_INSET], which is the container's own padding rather than an indent: they are the same rows
* they would be on their own, and a rounded corner drawn hard against a rounded corner reads as a
* notch.
* [GROUP_INSET], which is the container's own padding rather than an indent.
*
* Inside, the calls are a connected stack. Facing corners are square and the outer ones are not, so
* the run reads as one thing broken into its parts; [GROUP_GAP] keeps the parts legible without
* separating them. See [connectedShape].
* the run reads as one thing broken into its parts; see [connectedShape].
*
* It closes from either end. A long group's header scrolls off while its last call is still on
* screen, and the reader who wants it shut is looking at the bottom, not hunting for the top. The
* bar at the foot is the same height as the heading at the top, so the surface the calls sit on is
* as thick below them as above.
* screen, and the reader who wants it shut is looking at the bottom. The bar at the foot is the
* same height as the heading at the top.
*/
@Composable
fun ToolGroup(
@@ -171,8 +156,7 @@ fun ToolGroup(
expanded: Boolean,
/**
* Where it was pressed is the row's business rather than the control's -- a group has a control
* at each end, and only the row knows where its own ends are, so the row records the touch
* itself and this just says that one happened.
* at each end, and only the row knows where its own ends are.
*/
onToggle: () -> Unit,
isToolExpanded: (String) -> Boolean,
@@ -222,8 +206,8 @@ fun ToolGroup(
)
}
}
// Shutting it from here anchors the other end: the reader is at the bottom of a long
// group, and what they are looking at is what follows it.
// Shutting it from here anchors the other end: the reader is at the bottom of a long group,
// and what they are looking at is what follows it.
CollapseBar(barHeight, onToggle)
}
}
@@ -232,8 +216,8 @@ fun ToolGroup(
* The height of a group's heading, and so of the bar at its foot.
*
* Derived from the type the heading is set in rather than written down, because the two have to
* match and a pair of numbers chosen to look equal stops being equal the moment either the style or
* the density changes. Taking the line height also means the heading cannot be clipped by it.
* match and a pair of numbers chosen to look equal stops being equal the moment the density
* changes.
*/
@Composable
private fun groupBarHeight(): Dp {
@@ -242,10 +226,9 @@ private fun groupBarHeight(): Dp {
}
/**
* The bottom half of a group's toggle: an arrow back up to its heading.
*
* Given the heading's height rather than padded to something that looks close, so the surface the
* calls sit on is the same thickness at both ends. See [groupBarHeight].
* The bottom half of a group's toggle: an arrow back up to its heading. Given the heading's height
* rather than padded to something that looks close, so the surface the calls sit on is the same
* thickness at both ends.
*/
@Composable
private fun CollapseBar(height: Dp, onToggle: () -> Unit) {
@@ -266,8 +249,7 @@ private fun CollapseBar(height: Dp, onToggle: () -> Unit) {
* does not.
*
* Written once and given an index rather than branched at each end, because a stack has three cases
* that are one rule -- and the middle one is the case a hand-written first/last pair gets wrong
* when a run turns out to have three calls in it.
* that are one rule -- and the middle one is what a hand-written first/last pair gets wrong.
*/
@Composable
private fun connectedShape(index: Int, count: Int): CornerBasedShape {
@@ -294,12 +276,10 @@ private val GROUP_GAP = 2.dp
* One tool call.
*
* Closed, it is a single line: the tool's name and what the call is for. The command itself is not
* on it, because a wrapped command turns one row into four and a run of them into a wall -- and the
* name plus the intent is what somebody scanning the transcript is reading for.
* on it, because a wrapped command turns one row into four and a run of them into a wall.
*
* Open, it shows the command, whatever else the input carried, and the output. The timeout sits at
* the top right: it is a limit on the call rather than part of what the call does, and it is worth
* seeing beside the command it constrains rather than buried in the fields below it.
* the top right: it is a limit on the call rather than part of what the call does.
*
* A call waiting on permission is shown open whatever the reader last chose, since the command is
* the thing being decided and a row saying only "Bash" cannot be decided on.
@@ -342,10 +322,9 @@ fun ToolCard(
)
} ?: Spacer(Modifier.weight(1f))
}
// A spinner says the machine is working. While this call is waiting on an
// answer the machine is doing nothing at all -- the turn is stopped on the
// person reading it -- so it says whose move it is instead, in the colour this
// app uses everywhere for that.
// A spinner says the machine is working. While this call is waiting on an answer
// the machine is doing nothing at all -- the turn is stopped on the person reading
// it -- so it says whose move it is instead.
if (deciding) {
Spacer(Modifier.width(8.dp))
Text(
@@ -370,9 +349,9 @@ fun ToolCard(
modifier = Modifier.padding(top = 4.dp),
)
}
// Everything AskUserQuestion carries is the questions, and those are drawn
// below as something answerable; dumping the same JSON above them would be the
// decision stated twice, once unreadably.
// Everything AskUserQuestion carries is the questions, and those are drawn below as
// something answerable; dumping the same JSON above them would be the decision
// stated twice, once unreadably.
if (tool.tool != ASK_USER_QUESTION) {
ToolInputView(tool.tool, tool.input, Modifier.padding(top = 4.dp))
}
@@ -381,14 +360,12 @@ fun ToolCard(
Text("Output", style = MaterialTheme.typography.labelSmall)
// What the tool printed, on the surface everything verbatim gets and in the
// face it was written for: this is column-aligned far more often than it is
// prose -- a directory listing, a diff, a table of numbers -- and a
// proportional font silently destroys the alignment that carried the meaning.
// prose, and a proportional font silently destroys the alignment that carried
// the meaning.
//
// Its terminal styling applied and the rest of the escapes taken out, since
// what a shell prints is written for a terminal: colour is often the whole of
// what a diff or a test run is saying, and the sequences that carry it are
// unreadable drawn verbatim. Remembered against the text, so a card that is
// open through a scroll parses once. See [ansiStyled].
// Its terminal styling applied and the rest of the escapes taken out: colour is
// often the whole of what a diff or a test run is saying. Remembered against
// the text, so a card that is open through a scroll parses once.
val palette = remember { ansiPalette() }
val styled = remember(tool.output, palette) { ansiStyled(tool.output, palette) }
RawBlock(Modifier.padding(top = 2.dp)) {
@@ -400,10 +377,8 @@ fun ToolCard(
}
}
}
// Shown open or closed. A call that produced a picture is one
// whose result *is* the picture, and a row that hides it says
// less than the one line it replaced -- unlike a command, which
// is what the closed line already summarises.
// Shown open or closed. A call that produced a picture is one whose result *is* the
// picture, and a row that hides it says less than the one line it replaced.
tool.images.forEach { ref -> image(ref) }
if (tool.asks.isNotEmpty()) {
if (tool.tool == ASK_USER_QUESTION) {
@@ -428,11 +403,10 @@ private fun PermissionAsk(
onAnswer: (List<QuestionAnswer>, onSettled: () -> Unit) -> Unit,
) {
// What was pressed, before the answer has been round-tripped. Two bare words with no submit
// step -- unlike a question card, where the answer is several choices and worth reviewing --
// so the press has to be its own acknowledgement or the row sits unchanged for a round trip
// and reads as having missed the tap. Cleared when the request settles: by then either the
// answer is in `ask.answers` and the mark stands on a measurement, or it failed and the
// buttons come back rather than leaving a decision marked that nothing recorded.
// step -- unlike a question card, where the answer is worth reviewing -- so the press has to be
// its own acknowledgement or the row sits unchanged for a round trip. Cleared when the request
// settles: by then either the answer is in `ask.answers`, or it failed and the buttons come
// back.
var pressed by remember(ask.id) { mutableStateOf<String?>(null) }
Spacer(Modifier.height(8.dp))
Text(
@@ -442,8 +416,7 @@ private fun PermissionAsk(
)
// Answered or not, the options stay and the one that was taken is marked -- see
// [AskedQuestion], which is the same rule on the question card. A permission is where it
// matters most: "Answered: Deny" alone does not say that Allow was the alternative, and
// whether a tool was allowed or refused is the thing a reader comes back to this row for.
// matters most: "Answered: Deny" alone does not say that Allow was the alternative.
val settled = ask.answers.isNotEmpty()
AnswerOptions(
ask.options,
app/androidApp/src/main/kotlin/com/example/aiapp/TranscriptCache.kt
+589
View File
@@ -0,0 +1,589 @@
package com.example.aiapp
import android.util.Log
import java.io.BufferedWriter
import java.io.File
import java.io.FileWriter
import java.io.IOException
import java.io.RandomAccessFile
/**
* This phone's copy of the transcripts it has already been sent, so reopening a session does not
* download it again.
*
* What is stored is the server's own JSON for one event per line, in transcript order. Reading the
* cache means running the same [parseSeqEvent] the network path runs, so a cached transcript and a
* fetched one cannot draw differently, and an event type this build does not know keeps every field
* it arrived with for the build that will. Rows are deliberately *not* what is stored: a row is a
* rendering, and a cache of rows would need throwing away on every update that touched `foldEvent`.
*
* See TRANSCRIPT_CACHE.md for the design. Four rules run through all of it:
* 1. what is on screen is what the server's transcript says, in order, with nothing missing -- the
* cache is a copy and is never inferred, folded or edited here;
* 2. a cached line is never ahead of the live cursor, and the cursor never ahead of the cache;
* 3. the cache is never load-bearing -- missing, evicted, damaged or unwritable all degrade to a
* cold open, never to a blank or a wrong screen; 4. a line already on the phone is not fetched
* again.
*
* A plain [File] root and no Compose, `Context` or network, so the whole of the file logic runs
* under the JVM unit tests. That is also why there is no JSON parser here: what it needs off a line
* is the sequence number and whether the line is a streamed delta, both read with a regex. A line
* it cannot read that way is treated as damage. [warn] is where failures are said for the same
* reason.
*/
class TranscriptCache(
private val root: File,
private val warn: (String) -> Unit = { Log.w("ai-app", it) },
) {
/** The cache for one session, whether or not anything has been stored for it yet. */
fun session(id: String): SessionCache = SessionCache(File(root, id), warn)
/**
* Deletes every session directory not in [ids], called after a successful list fetch. The path
* out for a session deleted on another device: nothing here would otherwise hear about it, and
* unlike a draft's few bytes what it leaves behind is megabytes.
*/
fun retainOnly(ids: Set<String>) =
guardIo(Unit, warn) {
sessionDirs().forEach { if (it.name !in ids) it.deleteRecursively() }
}
/**
* Deletes least-recently-touched session directories, never [keep], until the whole of this
* server's cache is under [budget]. Least-recently-touched rather than largest: what a reader
* is likely to open again is what they opened last, and evicting the big ones first would empty
* the cache for exactly the conversations it exists for.
*/
fun evictToBudget(keep: String, budget: Long = CACHE_BUDGET_BYTES) =
guardIo(Unit, warn) {
val dirs = sessionDirs().sortedBy { it.lastModified() }
var total = dirs.sumOf { sizeOf(it) }
for (dir in dirs) {
if (total <= budget) break
if (dir.name == keep) continue
val was = sizeOf(dir)
if (dir.deleteRecursively()) total -= was
}
}
fun purgeAll() = guardIo(Unit, warn) { root.deleteRecursively() }
private fun sessionDirs(): List<File> = root.listFiles()?.filter { it.isDirectory }.orEmpty()
}
/**
* How much of this phone's cache directory all of one server's transcripts may take. A dozen of the
* largest transcripts seen in the dev VM (21 MB for 24,000 events) and a small fraction of a phone.
* A number to revisit against real use rather than a measurement of anything.
*/
const val CACHE_BUDGET_BYTES: Long = 256L * 1000 * 1000
/**
* What the newest cached line says, which is what the probe checks against the server. Both halves
* are wanted together: the seq is what the request asks about, and the line is what its answer is
* compared with.
*/
data class CachedTail(val seq: Long, val line: String)
/**
* One session's cached lines, as a directory of chunks.
*
* A chunk is a set of lines *and a claim about what they cover*, and the two are not the same
* thing: a coalesced page joins each run of streamed deltas into one event carrying the seq of the
* run's oldest delta, so a page whose newest event is seq 1,200 may cover everything up to the
* 1,650 it was fetched with, and nothing in the lines says so. So coverage is the half-open range
* in the file's name:
* ```
* <first>-<end>.rows.jsonl a coalesced page; end is the `before` it was fetched with
* <first>-<end>.raw.jsonl an uncoalesced page, or a closed live run <first>-open.raw.jsonl the
* live run; end is its last line's seq + 1
* ```
*
* Two chunks are adjacent when one's `end` is the other's `first`. Only the contiguous run ending
* at the newest chunk -- the **suffix** -- is ever served: chunks behind a gap are kept, because
* the gap is usually closed by paging back through it, but nothing is served across one.
*
* **The newest chunk is always raw**, which is what makes the stream cursor and the probe well
* defined. It holds by construction (the opening window and every stream frame are raw) and is
* checked on read: a `.rows` chunk at the newest end can only mean this app died between closing
* one live run and opening the next, and it discards the session.
*
* Nothing here is load-bearing. Every operation that touches the disk answers as though the cache
* were empty when it cannot, and a write failure disables writing for the rest of this instance's
* life so that a full disk costs one log line rather than one per delta.
*
* Every operation is synchronized, because two of them really do run at once: the stream appends
* live events from its own IO thread while a reader scrolling back reads pages from another. What
* it buys is that the open chunk's name, its end and its writer are never read half-rotated.
*/
class SessionCache(
private val dir: File,
private val warn: (String) -> Unit = { Log.w("ai-app", it) },
) {
/** Set by the first write that fails: a second would fail the same way, once per delta. */
private var disabled = false
/**
* The open chunk's writer, its file, and the seq that chunk now ends at.
*
* Buffered, and flushed on [flush], because a delta is a hundred bytes and arrives dozens of
* times a second while a reply streams. What that costs is the unflushed tail on a crash, which
* is safe: a shorter cache is a longer catch-up, never a wrong one.
*/
private var writer: BufferedWriter? = null
private var openFile: File? = null
private var openEnd: Long = 0
/**
* The newest line of the suffix, or null when there is none or the newest chunk is not raw.
*
* This is the cursor the live stream would resume from, so it is also what has to be shown to
* still be the server's own line before anything is resumed from it.
*/
@Synchronized
fun tail(): CachedTail? =
guard(null) {
val newest = suffix().lastOrNull() ?: return@guard null
var found: CachedTail? = null
eachLine(newest) { line ->
found = CachedTail(seqOf(line)!!, line)
false
}
found
}
/** The newest [limit] lines of the suffix, oldest first -- the opening window. */
@Synchronized
fun newest(limit: Int): List<String> =
guard(emptyList()) {
val taken = ArrayDeque<String>()
for (chunk in suffix().asReversed()) {
if (taken.size >= limit) break
eachLine(chunk) { line ->
taken.addFirst(line)
taken.size < limit
}
}
taken.toList()
}
/**
* The page of lines before [before], oldest first, or null when the cache cannot answer.
*
* Null is a miss -- the suffix does not cover the ground immediately below [before] -- and
* means the server has to be asked. Deliberately not an empty list: an empty page is how the
* screen is told it has reached the start of the conversation, and a cache saying that of
* history it merely does not hold would stop the transcript scrolling back for good.
*
* [before] is anywhere inside the suffix, not only at a chunk boundary. The cursor a warm open
* leaves behind is in the middle of the live run, so a cache that could only answer at a
* boundary would send the very first backwards page to the server and, since that page would
* overlap the run, keep none of it.
*
* With [rows] the count is rows rather than lines, mirroring the server's `parse_coalesced`.
* The deltas are not joined here -- `foldEvent` does that, and the joined row keeps the seq of
* its first delta either way.
*/
@Synchronized
fun page(before: Long, limit: Int, rows: Boolean): List<String>? =
guard(null) {
val suffix = suffix()
val newest = suffix.lastOrNull() ?: return@guard null
// Above what is held, or at or below where it starts: either way the run the caller is
// scrolling into is not continuous with this one, and only the server has it.
if (before > newest.end || before <= suffix.first().first) return@guard null
val taken = ArrayDeque<String>()
var counted = 0
var inRun = false
var wanting = true
for (chunk in suffix.asReversed()) {
if (!wanting) break
if (chunk.first >= before) continue
eachLine(chunk) { line ->
// The page is what is *before* the cursor; the rows at or above it are already
// on screen.
if (seqOf(line)!! >= before) return@eachLine true
if (rows) {
val delta = isDelta(line)
// Stop only between rows: a delta continuing the run being gathered is part
// of a row already counted, and breaking on it would drop the half of that
// row already taken.
if (counted >= limit && !(delta && inRun)) wanting = false
else {
if (!delta || !inRun) counted++
inRun = delta
}
} else if (taken.size >= limit) {
wanting = false
}
if (wanting) taken.addFirst(line)
wanting
}
}
taken.toList()
}
/**
* The `end` of the nearest chunk at or below [before], which is the floor a fetched page is
* asked with so that it stops where this phone's copy starts. Null when there is no such chunk.
*
* Any chunk, not only the suffix's: the whole point is to reach the run behind a gap, so that
* the gap is closed with exactly the bytes it is wide.
*/
@Synchronized
fun coveredUpTo(before: Long): Long? =
guard(null) { chunks().map { it.end }.filter { it <= before }.maxOrNull() }
/**
* Stores a fetched page covering `[first, end)`; false when it was not stored.
*
* Refused when it overlaps a chunk already here, because there is no clean cut: a coalesced
* event cannot be split at a seq inside its own delta run. `TranscriptSource` keeps that from
* arising by bounding what it fetches, and this is the guard for a page that arrives anyway.
* Such a page is still drawn; it is only not kept.
*
* The newest chunk is never stored through here: the opening window and every live frame go
* through [append], which is what keeps the newest chunk raw and open.
*/
@Synchronized
fun storePage(lines: List<String>, first: Long, end: Long, rows: Boolean): Boolean =
guard(false) {
if (disabled || lines.isEmpty() || end <= first) return@guard false
if (chunks().any { first < it.end && it.first < end }) return@guard false
dir.mkdirs()
val kind = if (rows) "rows" else "raw"
File(dir, "$first-$end.$kind.jsonl").writeText(lines.joinToString("\n", postfix = "\n"))
true
}
/**
* Appends one live event, which is also how a freshly fetched opening window is stored.
*
* A seq equal to the open chunk's end extends it. A larger one is a gap -- which is what a
* `reset` looks like from here -- and closes the open chunk under the end it turned out to
* have. A smaller one is already covered and is ignored; the SSE contract is `seq > after`.
*/
@Synchronized
fun append(line: String, seq: Long) =
guard(Unit) {
if (disabled) return@guard
val writer = writerFor(seq) ?: return@guard
// Written as it arrived. A newline inside it would split one event into two unreadable
// halves, but neither source can produce one: SSE framing forbids it, and a page's
// elements are re-serialized compactly, which escapes it.
writer.write(line)
writer.write("\n")
openEnd = seq + 1
}
/**
* Flushes what [append] has buffered. Called on each `Status` event -- the boundaries of a
* turn, which is the granularity a crash may as well lose -- and when the stream closes.
*/
@Synchronized fun flush() = guard(Unit) { writer?.flush() }
/** What [purge] would discard, for the reload row in session settings. */
@Synchronized fun bytes(): Long = guard(0L) { sizeOf(dir) }
/** Marks this session as visited, which is what eviction ranks by. */
@Synchronized
fun touch() =
guard(Unit) { if (dir.isDirectory) dir.setLastModified(System.currentTimeMillis()) }
@Synchronized
fun purge() =
guard(Unit) {
closeWriter()
dir.deleteRecursively()
}
// -- chunks ------------------------------------------------------------------------------
private data class Chunk(val file: File, val first: Long, val end: Long, val open: Boolean) {
val rows: Boolean
get() = file.name.endsWith(".rows.jsonl")
}
/**
* Every chunk on disk, oldest first. A name this does not recognise is not ours and is ignored.
* Recomputed per operation rather than kept: another operation may have changed the directory.
*/
private fun chunks(): List<Chunk> {
writer?.flush()
return dir.listFiles()
.orEmpty()
.mapNotNull { file ->
val match = CHUNK_NAME.matchEntire(file.name) ?: return@mapNotNull null
val first = match.groupValues[1].toLongOrNull() ?: return@mapNotNull null
val open = match.groupValues[2] == "open"
val end = if (open) openEndOf(file, first) else match.groupValues[2].toLongOrNull()
// A chunk covering nothing is one that was created and never written to -- an
// append whose very first write failed. It says nothing, so it is not a chunk.
if (end == null || end <= first) null else Chunk(file, first, end, open)
}
.sortedBy { it.first }
}
/**
* The open chunk's end: its last line's seq plus one, or the in-memory end while this instance
* is the one writing it.
*
* An open chunk whose last line cannot be read is this app having died mid-write. That line is
* dropped and the file truncated to the last good one, which is the one place damage is
* repaired rather than discarded: the tail of an append-only file is the only place a partial
* line can be.
*/
private fun openEndOf(file: File, first: Long): Long {
if (openFile == file && openEnd > 0) return openEnd
repairTail(file)
var end = first
eachLineBackwards(file) { _, line ->
seqOf(line)?.let { end = it + 1 }
false
}
return end
}
/**
* The contiguous run of adjacent chunks ending at the newest one, oldest first.
*
* A newest chunk that is not raw cannot happen while this code is the only writer, and means
* the directory is not to be trusted -- so the session is discarded.
*/
private fun suffix(): List<Chunk> {
val all = chunks()
var index = all.size - 1
val newest = all.lastOrNull() ?: return emptyList()
if (newest.rows) throw Damaged(newest.file)
val run = ArrayDeque<Chunk>()
run.addFirst(newest)
while (index > 0 && all[index - 1].end == run.first().first) {
index--
run.addFirst(all[index])
}
return run.toList()
}
/**
* Each line of [chunk], newest first, until [take] says stop.
*
* Backwards and lazily, because every question this cache is asked is about the newest end and
* a live run grows to the size of the conversation. Reading the file whole to answer with
* eighty lines of it is the cost the server's own reader was rewritten to stop paying.
*
* Damage anywhere but at the tail of the open chunk was not written by this code, and there is
* no honest way to say what a chunk covers with a line of it unreadable -- so it discards the
* session rather than serving what it can read.
*/
private fun eachLine(chunk: Chunk, take: (String) -> Boolean) {
eachLineBackwards(chunk.file) { _, line ->
if (seqOf(line) == null) throw Damaged(chunk.file)
take(line)
}
}
// -- writing -----------------------------------------------------------------------------
/** The writer for the chunk [seq] belongs in, opening or rotating one as it has to. */
private fun writerFor(seq: Long): BufferedWriter? {
writer?.let { held ->
if (seq == openEnd) return held
if (seq < openEnd) return null
// A gap: what this instance has written covers up to `openEnd`, and that is the name
// the chunk gets before a new one starts at the arriving seq.
closeOpenChunk(openEnd)
}
dir.mkdirs()
// An open chunk left by an earlier instance, or by an earlier screen.
chunks()
.lastOrNull { it.open }
?.let { existing ->
if (seq < existing.end) return null
if (seq == existing.end) {
openFile = existing.file
openEnd = existing.end
return FileWriter(existing.file, true).buffered().also { writer = it }
}
rename(existing.file, existing.first, existing.end)
}
// A chunk that was created and never written to would otherwise be left behind under a name
// a second one is about to want; it covers nothing, so nothing is lost with it.
dir.listFiles().orEmpty().forEach {
if (CHUNK_NAME.matchEntire(it.name)?.groupValues?.get(2) == "open" && it.length() == 0L)
it.delete()
}
val file = File(dir, "$seq-open.raw.jsonl")
openFile = file
openEnd = seq
return FileWriter(file, false).buffered().also { writer = it }
}
/** Renames the open chunk to the range it turned out to cover, so it stops being open. */
private fun closeOpenChunk(end: Long) {
val file = openFile
closeWriter()
if (file == null) return
val first = CHUNK_NAME.matchEntire(file.name)?.groupValues?.get(1)?.toLongOrNull()
if (first != null) rename(file, first, end)
}
private fun rename(file: File, first: Long, end: Long) {
file.renameTo(File(dir, "$first-$end.raw.jsonl"))
}
private fun closeWriter() {
try {
writer?.close()
} catch (_: IOException) {
// Nothing left to do about it: the file is what it is, and the read path repairs a
// half-written tail.
}
writer = null
openFile = null
openEnd = 0
}
// -- failure -----------------------------------------------------------------------------
/** A chunk that cannot be read as what its name claims. */
private class Damaged(val file: File) : RuntimeException()
/**
* Runs [body], answering [ifBroken] when the directory cannot give a real answer.
*
* None of this is reported on screen: none of it changes what the screen shows -- every read
* here has a network path beside it producing the same result -- and the reader has nothing to
* do about it. Damage discards this session's cache, which makes the next open an ordinary cold
* one.
*/
private fun <T> guard(ifBroken: T, body: () -> T): T =
// A disk that refused once will refuse again, once per delta, so the first refusal is also
// the last: this instance stops writing rather than logging a line a token.
guardIo(
ifBroken,
warn,
onFailure = {
disabled = true
closeWriter()
},
) {
try {
body()
} catch (e: Damaged) {
warn("transcript cache damaged at ${e.file}; discarding ${dir.name}")
closeWriter()
dir.deleteRecursively()
ifBroken
}
}
}
/** `<first>-<end|open>.<rows|raw>.jsonl`; anything else in the directory is not ours. */
private val CHUNK_NAME = Regex("""^(\d+)-(\d+|open)\.(rows|raw)\.jsonl$""")
private val SEQ_IN_LINE = Regex(""""seq"\s*:\s*(\d+)""")
private val TYPE_IN_LINE = Regex(""""type"\s*:\s*"([^"]*)"""")
/**
* One line's sequence number, or null when the line is not one of ours.
*
* A regex rather than a JSON parse, so that this file carries no parser and runs under the JVM
* tests: the seq is the first field the server writes, so the first match is the top-level one.
*/
private fun seqOf(line: String): Long? = SEQ_IN_LINE.find(line)?.groupValues?.get(1)?.toLongOrNull()
/** Whether a line is one streamed piece of a reply, which is what makes a run of them one row. */
private fun isDelta(line: String): Boolean =
TYPE_IN_LINE.find(line)?.groupValues?.get(1) == "assistantText"
/**
* How much of a file is read at a time when walking it backwards. One block covers a page of a
* transcript comfortably, and the walk stops as soon as the caller has what it asked for.
*/
private const val READ_BLOCK = 64 * 1024
/**
* Calls [onLine] with each non-blank line of [file], **newest first**, along with the byte offset
* it starts at, until [onLine] answers false.
*
* Every question the cache is asked is about the newest end of a chunk, and a live run reaches the
* size of the conversation, so reading forwards means reading a transcript to answer with the last
* eighty lines of it.
*
* Splitting on bytes is safe because the separator is `\n`, which cannot occur inside a multi-byte
* UTF-8 sequence; each line is decoded whole. A missing file yields nothing.
*/
private fun eachLineBackwards(file: File, onLine: (offset: Long, line: String) -> Boolean) {
if (!file.isFile) return
RandomAccessFile(file, "r").use { handle ->
// Bytes below `unread` have not been looked at; `pending` is the oldest line so far, which
// is incomplete until a newline is found before it in an older block.
var unread = handle.length()
var pending = ByteArray(0)
while (unread > 0) {
val take = minOf(READ_BLOCK.toLong(), unread).toInt()
val start = unread - take
val block = ByteArray(take)
handle.seek(start)
handle.readFully(block)
val buffer = if (pending.isEmpty()) block else block + pending
var lineEnd = buffer.size
var at = buffer.size - 1
while (at >= 0) {
if (buffer[at] == NEWLINE) {
val line = String(buffer, at + 1, lineEnd - at - 1, Charsets.UTF_8)
if (line.isNotBlank() && !onLine(start + at + 1, line)) return
lineEnd = at
}
at--
}
pending = buffer.copyOfRange(0, lineEnd)
unread = start
}
// The first line of a file has no newline before it to be found.
val first = String(pending, Charsets.UTF_8)
if (first.isNotBlank()) onLine(0, first)
}
}
private const val NEWLINE = '\n'.code.toByte()
/**
* Drops a final line that is not one of ours, by truncating the file to where it starts.
*
* This app having died mid-write is the one kind of damage that is repaired rather than discarded:
* the tail of an append-only file is the only place a partial line can be. A second bad line is not
* this, and is left for the read path to notice.
*/
private fun repairTail(file: File) {
var truncateTo = -1L
eachLineBackwards(file) { offset, line ->
if (seqOf(line) == null) truncateTo = offset
false
}
if (truncateTo >= 0) RandomAccessFile(file, "rw").use { it.setLength(truncateTo) }
}
private fun sizeOf(file: File): Long =
if (file.isDirectory) file.listFiles().orEmpty().sumOf { sizeOf(it) } else file.length()
/**
* The disk half of [SessionCache.guard], shared with [TranscriptCache]'s own maintenance.
* [onFailure] is what the caller does about it beyond answering [ifBroken].
*/
private fun <T> guardIo(
ifBroken: T,
warn: (String) -> Unit,
onFailure: () -> Unit = {},
body: () -> T,
): T =
try {
body()
} catch (e: IOException) {
warn("transcript cache unusable: ${e.message}")
onFailure()
ifBroken
} catch (e: SecurityException) {
warn("transcript cache unreadable: ${e.message}")
onFailure()
ifBroken
}
app/androidApp/src/main/kotlin/com/example/aiapp/TranscriptItems.kt
+102 -142
View File
@@ -5,9 +5,13 @@ import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.withContext
/**
* What the transcript renders: the event stream folded into displayable rows (see [foldEvent]). The
* stream is the only data source -- opening a session screen replays from seq 0, and a reconnect
* resumes from the last seq seen, so there is no separate history fetch to drift from it.
* What the transcript renders: the event stream folded into displayable rows (see [foldEvent]).
*
* Events are the only data source, and there is deliberately no second shape for history to drift
* from: a page fetched backwards, a live frame, and a line read out of this phone's own cache are
* all the same events through the same parser. [TranscriptCache] stores the server's lines rather
* than these rows for exactly that reason -- a row is a rendering, and its shape changes whenever
* this file does.
*/
@Immutable
sealed class TranscriptItem {
@@ -19,10 +23,8 @@ sealed class TranscriptItem {
* list is addressed by position: whatever somebody had scrolled to keeps its index while the
* content underneath it slides, which reads as the view scrolling on its own.
*
* A seq is the right identity because it is what the transcript itself is ordered by, it never
* changes, and it is already carried by every event. A row built from several events -- a
* streaming message, a tool call and its result -- keeps the seq of the first, so it holds
* still while the rest of it arrives.
* A row built from several events keeps the seq of the first, so it holds still while the rest
* of it arrives.
*/
abstract val seq: Long
@@ -30,10 +32,8 @@ sealed class TranscriptItem {
* This item's identity on screen, which is its [seq] for everything that has one of its own.
*
* Here rather than in [TranscriptRow.Single] because the two items that need something else are
* the two that know why: a tool call is named after its run, and a peer note is *sorted* by the
* turn it started rather than by where it arrived. Asking each item what it is called is also
* what stops the next such item being missed -- a `when` over concrete types in the row would
* have to gain a case, silently, and nothing says when it did not.
* the two that know why. Asking each item what it is called is also what stops the next such
* item being missed -- a `when` over concrete types would have to gain a case, silently.
*/
open val key: Any
get() = seq
@@ -54,15 +54,13 @@ sealed class TranscriptItem {
* What it buys is the split. [transcriptUnits] keeps the newest reply whole because a
* streaming reply's text changes per delta and splitting a changing text is a parse per
* delta -- but "newest" outlives the turn, so a session that ends on a long reply was
* drawing it as one item indefinitely, with every node of it alive. Measured on a Pixel 9
* Pro XL: one 34,996px reply on screen put the frame's draw phase at 13.8ms, 79% of it the
* framework's own bookkeeping, which grows with alive nodes.
* drawing it as one item indefinitely. Measured on a Pixel 9 Pro XL: one 34,996px reply on
* screen put the frame's draw phase at 13.8ms, 79% of it framework bookkeeping.
*
* Folded from the status event that ended the turn, rather than read off the screen's
* Folded from the status event that ended the turn rather than read off the screen's
* status, because rows only change through the held-events gate: the split changes the
* newest row's list identity, and doing that from a status flip while somebody is reading
* inside that reply would step the list under them. An event has to wait for the reader to
* be at the newest end; a screen state does not.
* inside that reply would step the list under them.
*/
val settled: Boolean = false,
) : TranscriptItem()
@@ -74,11 +72,10 @@ sealed class TranscriptItem {
* The run of adjacent calls this one belongs to, named once when the call is folded in and
* never recomputed.
*
* Carried rather than derived because a run can gain members at *either* end -- a new call
* arriving beside it, or a page of history arriving in front of it -- so no function of its
* current members is stable. It is the first call's id at the moment the run started, which
* is a name rather than a description: [joinPages] hands it to older calls that turn out to
* belong to the same run, instead of renaming the run they joined.
* Carried rather than derived because a run can gain members at *either* end, so no
* function of its current members is stable. It is the first call's id at the moment the
* run started, which is a name rather than a description: [joinPages] hands it to older
* calls that turn out to belong to the same run.
*/
val runId: String,
val tool: String,
@@ -89,19 +86,16 @@ sealed class TranscriptItem {
* The questions this call is waiting on, in the order they were asked.
*
* On the call's own row rather than beside it: an ask used to arrive as a second card
* repeating the input verbatim, so the reader saw the same command twice and had to work
* out that it was one event. The backend says which call a question is about, so this is a
* fact rather than a match on the input.
* repeating the input verbatim, so the reader saw the same command twice. The backend says
* which call a question is about, so this is a fact rather than a match on the input.
*
* A list because AskUserQuestion asks up to four at once, and they are one decision to make
* -- a permission is the case of exactly one, not a different shape.
* A list because AskUserQuestion asks up to four at once, and a permission is the case of
* exactly one rather than a different shape.
*/
val asks: List<QuestionCard> = emptyList(),
/**
* Images this call's result carried, drawn under it.
*
* Beside it they had to be paired by position, and position is the thing a page boundary
* breaks -- a screenshot loaded on one page and its call on the next read as unrelated.
* Images this call's result carried, drawn under it. Beside it they had to be paired by
* position, and position is what a page boundary breaks.
*/
val images: List<String> = emptyList(),
) : TranscriptItem() {
@@ -129,9 +123,8 @@ sealed class TranscriptItem {
data class ImageItem(override val seq: Long, val ref: String) : TranscriptItem()
/**
* A message another agent sent this session.
*
* Its own row rather than a [UserMsg]: see [PeerMessageRow] for why the voice matters.
* A message another agent sent this session. Its own row rather than a [UserMsg]: see
* [PeerMessageRow] for why the voice matters.
*/
data class PeerNote(
override val seq: Long,
@@ -140,11 +133,9 @@ sealed class TranscriptItem {
/**
* The seq of the event this note came in on, which is what makes it itself.
*
* [seq] is where the note *sorts*, and [placePeerNote] sets it to the seq the turn began at
* so the note is drawn above the reply it caused. Two messages that arrive during one turn
* therefore share a seq -- and sharing an identity as well killed the app, because the
* transcript list refuses two items with one key. Two agents writing to a session mid-turn
* is an ordinary afternoon, not a corner.
* [seq] is where the note *sorts*, and [placePeerNote] sets it to the seq the turn began
* at. Two messages that arrive during one turn therefore share a seq -- and sharing an
* identity as well killed the app, because the list refuses two items with one key.
*/
val arrived: Long = seq,
) : TranscriptItem() {
@@ -153,10 +144,9 @@ sealed class TranscriptItem {
}
/**
* A command the session ran on itself -- `/compact`, `/rename`.
*
* Kept in the transcript rather than only shown while it waits, because it explains what
* follows: a conversation that suddenly has half the context, or a session with a new name.
* A command the session ran on itself -- `/compact`, `/rename`. Kept in the transcript rather
* than only shown while it waits, because it explains what follows: a conversation that
* suddenly has half the context, or a session with a new name.
*/
data class CommandRow(override val seq: Long, val text: String) : TranscriptItem()
@@ -165,7 +155,6 @@ sealed class TranscriptItem {
/**
* A clear that happened: everything above it left the session's context and stayed on screen.
*
* Carries only its position, because that is all it means.
*/
data class ClearedNote(override val seq: Long) : TranscriptItem()
@@ -174,12 +163,12 @@ sealed class TranscriptItem {
* A compaction that happened, and what it recovered.
*
* In the transcript rather than only in the status line, because the status is gone the moment
* it finishes and this is the part worth keeping: it is the explanation for a gap in the
* conversation, and for a minute or two in which the session was busy with nothing to show.
* it finishes and this is the part worth keeping: the explanation for a gap in the
* conversation.
*
* The wire also says what triggered it, and this deliberately does not carry that: the row says
* the two sizes and nothing else (see [compactionSummary]), so keeping the trigger here would
* be a field nothing can read.
* The wire also says what triggered it, and this deliberately does not carry that -- the row
* says the two sizes and nothing else, so keeping the trigger would be a field nothing can
* read.
*/
data class CompactedNote(
override val seq: Long,
@@ -192,16 +181,13 @@ sealed class TranscriptItem {
* The run a call joins: the one it lands next to, or a new one named after itself.
*
* Only ever consulted when the call is first folded in. That is what makes the name stable -- a run
* keeps whatever it was called when it started, however many calls arrive at either end of it
* afterwards.
* keeps whatever it was called when it started, however many calls arrive at either end afterwards.
*
* A question to the reader is in a run of its own, which is what puts it on the transcript as a row
* rather than inside a collapsed "Called 6 tools" card. Two things follow from being alone: it is
* always visible, since a run of one is drawn as itself rather than as a group; and the calls
* around it fall into a group before it and a group after it, so where the reader was asked
* something is legible in the shape of the transcript without opening anything. It ends the run
* before it as well as starting a fresh one after -- the moment somebody was asked is a boundary in
* the work, not a gap in the middle of one run.
* rather than inside a collapsed "Called 6 tools" card. Two things follow: it is always visible,
* since a run of one is drawn as itself; and the calls around it fall into a group before it and a
* group after it, so where the reader was asked something is legible in the shape of the transcript
* without opening anything.
*/
private fun runIdFor(items: List<TranscriptItem>, id: String, tool: String): String {
val previous = items.lastOrNull() as? TranscriptItem.ToolRun ?: return id
@@ -214,31 +200,23 @@ private fun runIdFor(items: List<TranscriptItem>, id: String, tool: String): Str
* boundary cut in two.
*
* Two things straddle a boundary: a tool call separated from its result, and a message separated
* from the rest of itself. Both were one thing before the transcript was cut into pages, and both
* have to be one thing again -- a reply drawn as two messages is the same defect as a call drawn
* twice, arriving from the same cause.
* from the rest of itself. Both were one thing before the transcript was cut into pages.
*
* A boundary lands wherever it lands, and roughly half the time that is between a call and its
* result. The newer page then holds a `ToolEnd` whose start it never saw, which [foldEvent] draws
* as a row of its own -- correctly, because a call that renders as nothing is indistinguishable
* from one that never happened. When the older page arrives it brings the real `ToolStart`, and
* concatenating the two lists left *both*: the same call twice, once as a proper card and once as a
* nameless placeholder. Visible as a run of four calls reporting "Called 5 tools", and worse than
* the miscount -- the extra row is at the join, so it also moves everything the reader was looking
* at.
* concatenating the two lists left *both*: the same call twice.
*
* Merged by the call's own id rather than by position, because position is exactly what a page
* boundary destroys. The older row wins on what a start knows (the tool's name, its input) and the
* newer on what an end knows (the output, and whether it finished), which is the only way round
* that loses nothing.
* boundary destroys. The older row wins on what a start knows and the newer on what an end knows,
* which is the only way round that loses nothing.
*
* The third thing is the *run*, and it is the one that used to be missed. Every page ends up here,
* but [adoptRun] only ran on the path where a split call had been found -- so the boundary that
* falls cleanly between two finished calls, which is most of them, went straight to concatenation
* and left the older page's calls under the run name they were folded with. On screen: one run of
* tool calls drawn as two groups, with the seam wherever the reader happened to have paged. The two
* early returns were an optimisation on a list the size of one page, and they were skipping work
* rather than saving it.
* falls cleanly between two finished calls, which is most of them, left the older page's calls
* under the run name they were folded with. On screen: one run of tool calls drawn as two groups,
* with the seam wherever the reader happened to have paged.
*/
fun joinPages(earlier: List<TranscriptItem>, later: List<TranscriptItem>): List<TranscriptItem> {
val (older, newer) = healSplitMessage(earlier, later)
@@ -271,15 +249,13 @@ fun joinPages(earlier: List<TranscriptItem>, later: List<TranscriptItem>): List<
/**
* Rejoins a message the page boundary cut, and hands back the two pages to concatenate.
*
* [foldEvent] never leaves two assistant messages next to each other inside one page -- deltas
* accumulate into the message before them -- so two meeting at a join are always the two halves of
* one reply, and leaving them apart drew a single answer as two, with a paragraph break through the
* middle of a sentence.
* [foldEvent] never leaves two assistant messages next to each other inside one page, so two
* meeting at a join are always the two halves of one reply, and leaving them apart drew a single
* answer as two with a paragraph break through the middle of a sentence.
*
* The newer half keeps its identity, for the reason [adoptRun] gives: it is the row already on
* screen, and renaming that is how the list loses its anchor. It grows by what the older half
* brings, which is safe here and nowhere else -- the join is at the oldest end of what is loaded,
* so the growth extends off the top of the screen, away from the row the list anchors to.
* The newer half keeps its identity, for the reason [adoptRun] gives. It grows by what the older
* half brings, which is safe here and nowhere else -- the join is at the oldest end of what is
* loaded, so the growth extends off the top of the screen.
*/
private fun healSplitMessage(
earlier: List<TranscriptItem>,
@@ -297,19 +273,18 @@ private fun healSplitMessage(
* Hands the older calls at the join the name of the run they are joining.
*
* The two pages were folded separately, so a run split by the boundary came back as two runs with
* two names. Naming the joined run after the *older* half would be the obvious way round and is the
* wrong one: the newer half is the part already on screen, and renaming it is renaming the row the
* reader is looking at, which is how a list loses its anchor and steps under them. So the arriving
* calls take the name of the ones already there, and nothing visible changes identity.
* two names. Naming the joined run after the *older* half would be the obvious way round and is
* wrong: the newer half is the part already on screen, and renaming it is renaming the row the
* reader is looking at, which is how a list loses its anchor.
*/
private fun adoptRun(
earlier: List<TranscriptItem>,
later: List<TranscriptItem>,
): List<TranscriptItem> {
val first = later.firstOrNull() as? TranscriptItem.ToolRun ?: return earlier
// A question is in a run of its own on both sides of the join, the same as it would be had
// the two pages been folded as one -- see `runIdFor`. Without this the heal would merge a
// group straight through the row the reader was asked something on.
// A question is in a run of its own on both sides of the join, the same as it would be had the
// two pages been folded as one. Without this the heal would merge a group straight through the
// row the reader was asked something on.
if (first.tool == ASK_USER_QUESTION) return earlier
val joining = first.runId
val tail = earlier.takeLastWhile {
@@ -324,10 +299,8 @@ private fun adoptRun(
* A peer message goes above the turn it started, not where it happened to arrive.
*
* The live Claude Code path cannot record it in place: the CLI says nothing about a peer message
* until the turn's `result`, so the event lands below the whole reply it caused -- the answer
* printed above the question. The server stamps it with where that turn began
* ([SessionEvent.PeerMessage.turnStart]) and the note takes that seq, so it sorts into the list
* where it belongs rather than being drawn out of order at the end.
* until the turn's `result`, so the event lands below the whole reply it caused. The server stamps
* it with where that turn began and the note takes that seq.
*
* Taking the turn's opening seq as its own is also what keeps the list sorted, which anchors and
* paging both depend on. It is only a *position*, though, and the note keeps its own arrival seq as
@@ -335,8 +308,7 @@ private fun adoptRun(
* seq belongs to a status change and a status draws no row -- true, and it answered the wrong
* question: what two notes stamped with the same turn collide with is each other.
*
* Without a stamp -- a message replayed out of a session file, which is already in the right place
* -- it stays where it arrived.
* Without a stamp -- a message replayed out of a session file -- it stays where it arrived.
*/
private fun placePeerNote(
items: List<TranscriptItem>,
@@ -355,15 +327,14 @@ private fun placePeerNote(
* The calls the note now sits in front of, renamed if they were sharing a run with the calls behind
* it.
*
* A run is named from what a call landed next to (see [runIdFor]), and nothing there knows about
* turns -- so a turn opening with a tool call, straight after one that ended with one, folds them
* into a single run. Left alone, [groupToolRuns] would flush at the note and hand both halves the
* same name: two rows with one key, which a keyed list cannot draw at all.
* A run is named from what a call landed next to, and nothing there knows about turns -- so a turn
* opening with a tool call, straight after one that ended with one, folds them into a single run.
* Left alone, [groupToolRuns] would flush at the note and hand both halves the same name: two rows
* with one key, which a keyed list cannot draw at all.
*
* The later half is the one renamed, which is the opposite of a page join ([adoptRun]) and right
* for the opposite reason. There the two halves were always one run and the newer was already on
* screen; here they were never one turn's work, and both halves change appearance at the same
* moment the note appears between them.
* for the opposite reason: there the two halves were always one run, here they were never one
* turn's work.
*/
private fun splitRun(tail: List<TranscriptItem>, behind: String?): List<TranscriptItem> {
val first = tail.firstOrNull() as? TranscriptItem.ToolRun ?: return tail
@@ -401,12 +372,10 @@ fun foldEvent(items: List<TranscriptItem>, entry: SeqEvent): List<TranscriptItem
)
is SessionEvent.ToolUpdate -> updateTool(items, event.id) { it.copy(output = event.output) }
is SessionEvent.ToolEnd ->
// Created when its start is not here, rather than dropped. A
// fold that only ever *updates* loses the whole call when the
// start fell outside the loaded window, and a tool call that
// renders as nothing is indistinguishable from one that never
// happened. The name is unknown from an end alone; loading the
// page before this one replaces the row with the real thing.
// Created when its start is not here, rather than dropped. A fold that only ever
// *updates* loses the whole call when the start fell outside the loaded window, and a
// tool call that renders as nothing is indistinguishable from one that never happened.
// Loading the page before this one replaces the row with the real thing.
if (items.any { it is TranscriptItem.ToolRun && it.id == event.id }) {
updateTool(items, event.id) { it.copy(output = event.output, done = true) }
} else {
@@ -414,9 +383,8 @@ fun foldEvent(items: List<TranscriptItem>, entry: SeqEvent): List<TranscriptItem
TranscriptItem.ToolRun(
entry.seq,
event.id,
// The name is not known from an end alone, so a call that was an ask
// cannot be recognised as one here; loading the page before this
// replaces the row with the real thing, which is when it splits out.
// The name is not known from an end alone, so a call that was an ask cannot
// be recognised as one here; the page before this replaces the row.
runIdFor(items, event.id, "tool"),
"tool",
"",
@@ -435,9 +403,8 @@ fun foldEvent(items: List<TranscriptItem>, entry: SeqEvent): List<TranscriptItem
event.multiSelect,
emptyList(),
)
// A question with no tool behind it -- AskUserQuestion, or an ask
// whose call fell outside the loaded window -- is a card of its
// own, which is what every question was before this.
// A question with no tool behind it -- AskUserQuestion, or an ask whose call fell
// outside the loaded window -- is a card of its own.
if (
event.about != null &&
items.any { it is TranscriptItem.ToolRun && it.id == event.about }
@@ -448,9 +415,9 @@ fun foldEvent(items: List<TranscriptItem>, entry: SeqEvent): List<TranscriptItem
}
}
is SessionEvent.Answered ->
// Resolved wherever it is drawn: a card of its own, or a tool
// row's ask. Missing the second left an Allow/Deny pair live on
// a question already answered from another device.
// Resolved wherever it is drawn: a card of its own, or a tool row's ask. Missing the
// second left an Allow/Deny pair live on a question already answered from another
// device.
items.map {
when {
it is TranscriptItem.QuestionCard && it.id == event.id ->
@@ -470,20 +437,19 @@ fun foldEvent(items: List<TranscriptItem>, entry: SeqEvent): List<TranscriptItem
is SessionEvent.CommandSent -> items + TranscriptItem.CommandRow(entry.seq, event.text)
// Screen-level state, not transcript rows -- see SessionScreen.
is SessionEvent.CommandQueued -> items
// No row of its own: a message that is still waiting is drawn as a pending bubble below
// the transcript, and becomes an ordinary one where the session read it.
// No row of its own: a message that is still waiting is drawn as a pending bubble below the
// transcript, and becomes an ordinary one where the session read it.
is SessionEvent.MessageQueued -> items
// The bubble goes away and nothing takes its place: the message was never read, so there
// is nothing it belongs above.
// The bubble goes away and nothing takes its place: the message was never read, so there is
// nothing it belongs above.
is SessionEvent.MessageDropped -> items
is SessionEvent.Settings -> items
is SessionEvent.Status -> settleReply(items, event.state)
is SessionEvent.Error -> items + TranscriptItem.ErrorMsg(entry.seq, event.message)
is SessionEvent.Image ->
// Under the call that produced it when there is one, and a row of
// its own when there is not -- a person's own attachment belongs
// to no call, and neither does one whose call fell outside the
// loaded window.
// Under the call that produced it when there is one, and a row of its own when there is
// not -- a person's own attachment belongs to no call, and neither does one whose call
// fell outside the loaded window.
if (
event.about != null &&
items.any { it is TranscriptItem.ToolRun && it.id == event.about }
@@ -503,9 +469,8 @@ fun foldEvent(items: List<TranscriptItem>, entry: SeqEvent): List<TranscriptItem
/**
* A status saying the session stopped working is the moment its newest reply is finished.
*
* See [TranscriptItem.AssistantMsg.settled] for what the mark buys and why it is made here in the
* fold. Status changes are transcript events with seqs of their own, so a replayed session settles
* its replies the same way a live one does.
* See [TranscriptItem.AssistantMsg.settled]. Status changes are transcript events with seqs of
* their own, so a replayed session settles its replies the same way a live one does.
*/
private fun settleReply(items: List<TranscriptItem>, state: String): List<TranscriptItem> {
if (sessionWorking(state)) return items
@@ -528,8 +493,7 @@ private fun updateTool(
* The default dispatcher sizes itself to the machine, which is right for work somebody is waiting
* on and wrong for work nobody is. A page of history is hundreds of parses arriving at once, and
* taking every core for them leaves the thread that draws the frame queueing behind one -- measured
* on a Pixel 9 Pro XL as 21ms of `waited` at the 90th percentile, which is the frame failing to
* *start* rather than taking too long once it had.
* on a Pixel 9 Pro XL as 21ms of `waited` at the 90th percentile.
*/
@OptIn(kotlinx.coroutines.ExperimentalCoroutinesApi::class)
private val parsingThreads = Dispatchers.Default.limitedParallelism(2)
@@ -538,37 +502,33 @@ private val parsingThreads = Dispatchers.Default.limitedParallelism(2)
* Parses the markdown among [rows], off whatever thread is drawing.
*
* Called where a page of transcript is folded rather than where a row is composed, which is the
* whole point: the work happens seconds before the reader reaches the rows it was done for. See
* [ParsedReplies].
* whole point: the work happens seconds before the reader reaches the rows it was done for.
*
* What is warmed mirrors what the rows draw -- each prose part of a reply, a memory note, a peer
* message, every one of them whole, since every piece of a message is drawn from its one parse --
* because a string warmed under a key no row ever looks up is a miss that nothing reports; see
* [transcriptUnits], which is the flatten this has to agree with. It reads the same
* message -- because a string warmed under a key no row ever looks up is a miss that nothing
* reports; see [transcriptUnits], which is the flatten this has to agree with. It reads the same
* [ParsedReplies.partsOf] cache the flatten does, so a message is scanned once however many pages
* hand it back through here, while the whole loaded transcript crosses this on every page.
* hand it back through here.
*
* Every kind of row that draws markdown belongs in the `when` below. That is the rule the peer
* message was missing: this used to filter for assistant replies alone, so the one row type nobody
* had thought about paid its whole parse in the frame it appeared in, with no counter saying which
* row it was.
* had thought about paid its whole parse in the frame it appeared in.
*/
suspend fun warm(replies: ParsedReplies, rows: List<TranscriptItem>) {
withContext(parsingThreads) {
val texts = rows.flatMap { row ->
when (row) {
is TranscriptItem.AssistantMsg -> replies.partsOf(row.text).map { it.text }
// A message from another agent is markdown too, and it is the longest thing
// in a transcript often enough that leaving it out was the whole of why one
// cost a fifth of a second to open: it was the only markdown in the app
// parsed on the thread that draws.
// A message from another agent is markdown too, and it is the longest thing in a
// transcript often enough that leaving it out was the whole of why one cost a fifth
// of a second to open.
is TranscriptItem.PeerNote -> listOf(row.text)
else -> emptyList()
}
}
if (texts.isNotEmpty()) replies.warm(texts)
// After the parses exist, not before: [ParsedReplies.splitReady] is the flatten's
// licence to draw these as blocks on the composing thread.
// After the parses exist, not before: [ParsedReplies.splitReady] is the flatten's licence
// to draw these as blocks on the composing thread.
rows.forEach { if (it is TranscriptItem.AssistantMsg) replies.markSplitReady(it.text) }
}
}
app/androidApp/src/main/kotlin/com/example/aiapp/TranscriptList.kt
+11 -20
View File
@@ -25,31 +25,24 @@ import androidx.compose.ui.unit.dp
* zero is the newest content and sits at the bottom, so a message arriving extends the end the
* viewport is pinned to and following it is not an effect -- and a page of older history lands at
* indices past everything visible, which moves nothing on screen. The keyboard is the same case
* from the other side: the viewport shrinks and the anchored item stays against its bottom edge. A
* conversation shorter than the screen stacks from the bottom, hanging from the composer.
* from the other side: the viewport shrinks and the anchored item stays against its bottom edge.
*
* The lazy list is also the whole of the windowing. Only what is near the viewport is composed and
* alive, so the per-frame cost is bounded by the screen rather than by how much is loaded -- the
* property a plain column here had to approximate with retained ranges and stand-in spacers, each
* of which was a way to flicker. An item the framework composes is drawn the same frame it is
* placed, and an item off screen is not a node at all.
* of which was a way to flicker.
*
* What keeps a unit's arrival cheap enough to happen mid-fling: a unit is at most one block of a
* reply, and its parse is already made by [warm] before the fold that introduces it -- so entering
* composition costs laying out one paragraph, not parsing a message.
* reply, and its parse is already made by [warm] before the fold that introduces it.
*
* The whole list sits in a [SelectionContainer], which is what makes every word in the transcript
* selectable by the platform's own press-and-hold. Here rather than at each place text is drawn: a
* transcript is one body of text to a reader, and a container per row would mean a selection could
* never cross from a reply into the tool output that follows it -- and would leave whatever was
* drawn without one silently unselectable, which is a state nothing on screen reports. Rows keep
* their tap handlers: selection is a long press, and the container passes an ordinary click through
* to the card under it.
* The whole list sits in a [SelectionContainer], which is what makes every word selectable by the
* platform's own press-and-hold. Here rather than at each place text is drawn: a transcript is one
* body of text to a reader, and a container per row would mean a selection could never cross from a
* reply into the tool output that follows it -- and would leave whatever was drawn without one
* silently unselectable. Rows keep their tap handlers: selection is a long press.
*
* [selection] is the container's own state, held by the caller rather than made here, because the
* rows have to be able to ask whether anything is selected before they act on a tap -- a tap whose
* job is to put a selection away is not also a tap on the card under it. See the caller's
* `expanding`.
* rows have to be able to ask whether anything is selected before they act on a tap.
*/
@Composable
fun TranscriptList(
@@ -69,8 +62,7 @@ fun TranscriptList(
modifier =
// Timed in two halves because the frame's draw phase is where Compose's measurement
// lands, and "draw is high while nothing is being recorded" does not say which
// half;
// see [drawAccounting]. Measure includes composing the items that scrolled in.
// half. Measure includes composing the items that scrolled in.
modifier
.layout { measurable, constraints ->
val started = System.nanoTime()
@@ -104,8 +96,7 @@ fun TranscriptList(
}
// Standing in for everything not fetched yet. Only here while there is more -- its
// appearance at the top edge is also roughly when the next page is asked for, so what
// it
// reports is a fetch in flight rather than an end reached.
// it reports is a fetch in flight rather than an end reached.
if (moreHistory) {
item(key = "history", contentType = "history") {
Box(Modifier.fillMaxWidth().padding(vertical = 24.dp)) {
app/androidApp/src/main/kotlin/com/example/aiapp/TranscriptSource.kt
+177
View File
@@ -0,0 +1,177 @@
package com.example.aiapp
import android.content.Context
import java.io.File
import java.util.concurrent.atomic.AtomicReference
/**
* Where the session screen gets a transcript from: this phone's copy first, the server for the
* rest.
*
* One seam rather than a cache the screen has to remember to consult. Everything it fetched before
* is asked of this, and everything the server sends is written into the cache on the way past, so
* the screen never learns which side answered. What it does learn, through [DebugStats], is how
* often each one did.
*
* See TRANSCRIPT_CACHE.md. The one rule worth keeping in mind: the cache is never load-bearing.
* Every read has a network path beside it producing the same result.
*/
class TranscriptSource(
private val settings: ServerSettings,
private val sessionId: String,
val cache: SessionCache,
) {
private val stream = AtomicReference<EventStream?>(null)
/**
* The cached opening window, or null when there is nothing usable to draw.
*
* Drawn *before* [probe] returns, which is the whole point of the feature: the rows are on
* screen while the check that they are still the server's rows is in flight, and a failed check
* replaces them exactly as a `reset` does.
*/
fun cachedOpening(limit: Int = OPENING_WINDOW): List<SeqEvent>? {
if (cache.tail() == null) return null
val lines = cache.newest(limit)
if (lines.isEmpty()) return null
return try {
lines.map { parseSeqEvent(it) }
} catch (e: org.json.JSONException) {
// Lines this build cannot read at all, which the cache's own checks cannot see: it
// reads a seq off a line, not an event. Nothing to serve, so a cold open.
cache.purge()
null
}
}
/**
* Whether the server's event at the cached cursor is still the cached one.
*
* The screen must not resume a stream from a cached seq unless it is the same conversation. A
* transcript is append-only in ordinary use, but the file can be replaced or truncated -- a
* sandbox re-seeded with the same ids, a backup restored, a session re-imported -- and the
* server's catch-up on such a file would hand this phone a continuation of a *different*
* conversation, spliced onto the cached one with no seam. Caught with one request of a few
* hundred bytes, in the slot the opening page's request used to be in.
*
* False purges the cache and means "open cold". A throw is the server not being askable, which
* is neither: the cached rows stay on screen and the caller tries again on the reconnect
* schedule.
*
* What this cannot see is a line changed in the middle of the file with the tail intact. That
* is what the Reload button in session settings is for.
*/
suspend fun probe(): Boolean {
val tail = cache.tail() ?: return false
// `before = seq + 1` is the newest event with seq <= the cursor, which is the event *at*
// the cursor when the server still has one there.
val answer = fetchTranscript(settings, sessionId, before = tail.seq + 1, limit = 1)
val matches =
answer.size == 1 &&
try {
answer[0].second == parseSeqEvent(tail.line)
} catch (e: org.json.JSONException) {
false
}
if (!matches) cache.purge()
return matches
}
/**
* Today's opening fetch, kept as the start of the live run. Only called when the cache has
* nothing to open with, or when [probe] said what it had was not the server's.
*/
suspend fun fetchOpening(): List<SeqEvent> {
DebugStats.count("transcript page from server")
val page = fetchTranscript(settings, sessionId, limit = OPENING_WINDOW)
page.forEach { (line, entry) -> cache.append(line, entry.seq) }
cache.flush()
return page.map { it.second }
}
/**
* The page before [before]: from the cache when it holds it, otherwise from the server bounded
* by what the cache already has.
*
* The bound is what keeps the cache worth having. A coalesced page reaches back as far as its
* row count takes it -- a single reply is hundreds of lines -- so a page fetched after the
* reader has been away would run straight past the cached run and overlap it, and an
* overlapping page cannot be stored. Told where this phone's copy starts, the server stops
* there instead.
*/
suspend fun page(before: Long, limit: Int, coalesce: Boolean): List<SeqEvent> {
cache.page(before, limit, rows = coalesce)?.let { lines ->
DebugStats.count("transcript page from cache")
return lines.map { parseSeqEvent(it) }
}
DebugStats.count("transcript page from server")
val page =
fetchTranscript(
settings,
sessionId,
before = before,
limit = limit,
coalesce = coalesce,
after = cache.coveredUpTo(before)?.minus(1),
)
if (page.isNotEmpty()) {
// `before` rather than the newest line's seq: a coalesced page covers everything up to
// the cursor it was asked with, and nothing in its lines says so.
cache.storePage(page.map { it.first }, page.first().second.seq, before, rows = coalesce)
}
return page.map { it.second }
}
/**
* [EventStream.run], with every frame written to the cache before [onEvent] sees it.
*
* Before, so that an event held back for a reader who is scrolled away is already on disk --
* what the cache holds is what the server sent, not what the screen has got round to drawing.
* Flushed on each status change, which is a turn's boundary and the granularity a crash may as
* well lose.
*/
fun follow(after: Long, onOpen: () -> Unit, onReset: () -> Unit, onEvent: (SeqEvent) -> Unit) {
val opened = EventStream(settings, sessionId)
stream.getAndSet(opened)?.close()
try {
opened.run(after, onOpen, onReset) { raw, entry ->
cache.append(raw, entry.seq)
if (entry.event is SessionEvent.Status) cache.flush()
onEvent(entry)
}
} finally {
cache.flush()
}
}
/** Ends the stream, from any thread, and leaves the cache with everything it was given. */
fun close() {
stream.getAndSet(null)?.close()
cache.flush()
}
}
/**
* How many events the screen opens with, cached or fetched.
*
* The server's own default for a page, named here because the cached opening has to be the same
* size as the fetched one -- a reader must not get a shorter first screen for having been here
* before.
*/
private const val OPENING_WINDOW = 80
/**
* Where this server's cached transcripts live.
*
* Under `cacheDir` because that is exactly what it is for: bytes the phone can regenerate from the
* server, which Android may delete under storage pressure without asking. Keyed by host and port
* because two servers can hold a session with the same id, and a line from one shown against the
* other is the whole invariant broken. `v1` is the layout's version.
*/
fun cacheRoot(context: Context, settings: ServerSettings): File {
val transcripts = File(context.cacheDir, "transcripts")
transcripts.listFiles()?.forEach { if (it.name != CACHE_VERSION) it.deleteRecursively() }
return File(transcripts, "$CACHE_VERSION/${settings.host}_${settings.port}")
}
private const val CACHE_VERSION = "v1"
app/androidApp/src/main/kotlin/com/example/aiapp/TranscriptUnits.kt
+22 -33
View File
@@ -12,8 +12,7 @@ import androidx.compose.ui.unit.dp
* at the moment it scrolls into view, and that cost is proportional to the item -- a reply can be
* twenty-five screens of markdown, which as one item is a hundred-millisecond frame exactly when
* the list is moving fastest. A *block* is a paragraph, a fence, a table: bounded, so the worst
* frame is bounded. This is the piece that was missing when a lazy list was last tried here; the
* block splitting existed only inside the row, where the list could not see it.
* frame is bounded. This is the piece that was missing when a lazy list was last tried here.
*
* Everything else about the row model is unchanged: rows come from [groupToolRuns], and a unit
* points back at its row. The list draws units; anchors and paging still speak seq.
@@ -27,10 +26,9 @@ sealed class TranscriptUnit {
abstract val seq: Long
/**
* This unit's position within its row, counted from the row's oldest end.
*
* What a saved scroll position carries besides the seq: a reply split into forty blocks needs
* more than "somewhere in this row" to put a reader back where they stopped.
* This unit's position within its row, counted from the row's oldest end. What a saved scroll
* position carries besides the seq: a reply split into forty blocks needs more than "somewhere
* in this row" to put a reader back where they stopped.
*/
abstract val ordinal: Int
@@ -66,15 +64,13 @@ sealed class TranscriptUnit {
*
* A peer message is the one row whose *opened* size is unbounded -- these are the longest
* things a transcript holds -- so it is flattened the same way a settled reply is, and for the
* same reason: as one item, every block of it is composed, measured, placed and kept alive
* while any part of it is on screen. Measured on the emulator, opening a 43KB one took the
* transcript's share of the draw phase from 0.81ms a frame to 3.85ms, and the framework's own
* per-frame bookkeeping -- which grows with how many nodes are *alive* -- from 0.39ms to
* 3.15ms.
* same reason. Measured on the emulator, opening a 43KB one took the transcript's share of the
* draw phase from 0.81ms a frame to 3.85ms, and the framework's own per-frame bookkeeping from
* 0.39ms to 3.15ms.
*
* The card is drawn in pieces rather than given up: a filled Material card is elevation zero,
* so it has no shadow to break, and each piece paints the same fill with only the corners it
* owns. See [PeerHeadRow] and [PeerBlockRow].
* owns.
*/
data class PeerHead(
override val seq: Long,
@@ -84,8 +80,7 @@ sealed class TranscriptUnit {
) : TranscriptUnit() {
/**
* The note's own key, so opening and shutting does not change what the list is anchored on
* -- and so two notes stamped with one turn's seq are still two items. See
* [TranscriptItem.PeerNote].
* -- and so two notes stamped with one turn's seq are still two items.
*/
override val key: Any
get() = item.key
@@ -119,8 +114,7 @@ sealed class TranscriptUnit {
*
* A user message is plain text, so cutting it costs a scan rather than a parse -- but the
* reason is the same as for a settled reply: as one item, a pasted log is a hundred thousand
* pixels of `Text` whose layout lands in the frame the row scrolls into. Measured as the
* `measure: the whole transcript ... 112.1ms worst` in an otherwise smooth report.
* pixels of `Text` whose layout lands in the frame the row scrolls into.
*/
data class UserChunk(
override val seq: Long,
@@ -152,14 +146,11 @@ sealed class TranscriptUnit {
* The rows flattened into list units, newest first -- index zero is the item at the bottom of the
* screen, which is what a reversed lazy list calls the start.
*
* Every settled reply is cut into its pieces ([pieces], via the caches on [replies] so a message is
* only ever cut once), and so is an *opened* peer message -- [openNotes] is which ones those are,
* which is why the flatten needs it. A shut one is a single heading and cannot be worth splitting.
* The reply still arriving -- the newest row, until the status event that ends its turn marks it
* [TranscriptItem.AssistantMsg.settled] -- stays whole: its text changes with every delta, and
* splitting it here would parse the whole message per delta on whichever thread is composing.
* [AssistantMessage]'s own streaming path already parses deltas off the main thread and gives the
* live message a layer per piece. Once settled it splits like every other reply, which is what
* Every settled reply is cut into its pieces (via the caches on [replies] so a message is only ever
* cut once), and so is an *opened* peer message -- [openNotes] is which ones those are. A shut one
* is a single heading and cannot be worth splitting. The reply still arriving stays whole: its text
* changes with every delta, and splitting it here would parse the whole message per delta on
* whichever thread is composing. Once settled it splits like every other reply, which is what
* bounds the newest row's cost after a session ends on a long one.
*
* Runs per fold, so it must stay proportional to what is loaded with no parsing in it on the warm
@@ -200,8 +191,8 @@ fun transcriptUnits(
}
}
} else if (item is TranscriptItem.UserMsg && item.text.length > USER_SPLIT_CHARS) {
// A scan, not a parse, so it is cheap enough for the fold path -- and cached like
// the markdown splits so the scan too happens once per message, not once per fold.
// A scan, not a parse, so it is cheap enough for the fold path -- and cached like the
// markdown splits so the scan happens once per message rather than once per fold.
val chunks = replies.chunksOf(item.text)
chunks.forEachIndexed { at, chunk ->
units +=
@@ -252,8 +243,8 @@ fun transcriptUnits(
}
units.reverse()
reportDuplicateKeys(units)
// Timed because this runs per fold on the composing thread: "loading messages feels bumpy"
// is this number growing, and it was invisible until it was written down.
// Timed because this runs per fold on the composing thread: "loading messages feels bumpy" is
// this number growing, and it was invisible until it was written down.
DebugStats.record("units flattened", System.nanoTime() - started)
return units
}
@@ -261,9 +252,8 @@ fun transcriptUnits(
/**
* Whether this reply should be drawn as blocks: settled, or anywhere but the newest row.
*
* Wanting is not being ready -- the flatten also asks [ParsedReplies.splitReady], and the two
* questions are separate because they are answered by different things: this one by the fold, the
* other by whether [warm] has run for the text. [unwarmedReplies] is the gap between them.
* Wanting is not being ready -- the flatten also asks [ParsedReplies.splitReady], and the two are
* answered by different things: this one by the fold, the other by whether [warm] has run.
*/
private fun splitWanted(item: TranscriptItem.AssistantMsg, index: Int, lastIndex: Int) =
item.settled || index != lastIndex
@@ -272,8 +262,7 @@ private fun splitWanted(item: TranscriptItem.AssistantMsg, index: Int, lastIndex
* The replies among [rows] that should draw as blocks but whose parses are not made yet.
*
* Normally empty: every page's rows are warmed before the fold lands. The one row that can be cold
* is the reply that just finished streaming -- nothing warms live deltas, so at the moment its turn
* ends its split would cost a whole-message parse on the composing thread. The session screen warms
* is the reply that just finished streaming -- nothing warms live deltas. The session screen warms
* what this returns off-thread and re-flattens, so the whole-to-blocks swap always composes against
* ready parses.
*/
app/androidApp/src/main/kotlin/com/example/aiapp/UniqueItems.kt
+6 -10
View File
@@ -12,19 +12,15 @@ import androidx.compose.runtime.Composable
* on the main thread -- so it is not an error the screen can show, it closes the app. That is a
* disproportionate answer to a list with a repeat in it, and it lands on the reader rather than on
* whoever produced the repeat: on 2026-08-31 the import list crashed on a Claude Code session id
* recorded under two project directories, which is an ordinary state of a machine and not something
* the phone did.
* recorded under two project directories, which is an ordinary state of a machine.
*
* Every list in this app keyed on an id keyed it on an id *the server chose*, so all of them shared
* the hazard and none of them could rule it out locally. Hence one function they all go through
* rather than a `distinctBy` remembered at each call site.
* the hazard and none could rule it out locally. Hence one function they all go through.
*
* Dropping the repeat is the right answer here because the key is the whole identity: two rows with
* one id are two rows every action would treat as the same thing, so there is nothing to show about
* the second that the first is not already showing. Where the duplicate means something -- the
* import list's did -- the fix belongs at the source, and this is only what stops a data problem
* from being a crash. It is counted so the render report says it happened rather than leaving a
* silently shorter list.
* Dropping the repeat is right here because the key is the whole identity: two rows with one id are
* two rows every action would treat as the same thing. Where the duplicate means something, the fix
* belongs at the source, and this is only what stops a data problem from being a crash. It is
* counted so the render report says it happened rather than leaving a silently shorter list.
*
* The transcript's own list is deliberately not on this: its keys are made here rather than
* received, and it is the one list where an extra pass over the items is measurable.
app/androidApp/src/main/kotlin/com/example/aiapp/UsageDialog.kt
+27 -36
View File
@@ -27,17 +27,14 @@ import java.time.OffsetDateTime
* A dialog rather than a screen. Usage is something you check *against* what you were reading --
* "can I start this" is asked with the transcript still on screen -- and pushing a whole screen for
* it took the session away to answer a question about the session. It also has no navigation of its
* own: there is nothing here to open, so the only thing its Back could ever have meant was "put
* this away", which is what dismissing does. The system back gesture dismisses it, since a `Dialog`
* handles that itself.
* own, so the only thing its Back could ever have meant was "put this away".
*/
@Composable
fun UsageDialog(feed: UsageFeed, onDismiss: () -> Unit) {
// A plain Dialog rather than an AlertDialog, for the spacing alone. AlertDialog fixes the
// gaps between its title, its content and its buttons at sizes meant for a sentence of prose
// and a decision; this is a dense read-out, and those gaps left a band of empty dialog above
// Close that was taller than a bar. Everything else here is what AlertDialog would have
// drawn -- the same container colour, the same corner -- so nothing about it looks foreign.
// A plain Dialog rather than an AlertDialog, for the spacing alone. AlertDialog fixes the gaps
// between its title, content and buttons at sizes meant for a sentence of prose and a decision;
// this is a dense read-out, and those gaps left a band of empty dialog above Close that was
// taller than a bar.
Dialog(onDismissRequest = onDismiss) {
Surface(
shape = MaterialTheme.shapes.extraLarge,
@@ -49,11 +46,9 @@ fun UsageDialog(feed: UsageFeed, onDismiss: () -> Unit) {
modifier = Modifier.fillMaxWidth(),
) {
// Deliberately not subtitled with the provider this was opened from. These
// numbers belong to an account on a particular machine, reported by whichever
// paid service answered there -- naming the session's provider here made an
// echo session's screen read "echo" above a line reading "claude", which is a
// claim about echo that nothing measured. Each machine names itself and the
// service it came from, which is the true scope.
// numbers belong to an account on a particular machine -- naming the session's
// provider here made an echo session's screen read "echo" above a line reading
// "claude". Each machine names itself and the service it came from.
Text(
"Usage",
style = MaterialTheme.typography.headlineSmall,
@@ -69,10 +64,9 @@ fun UsageDialog(feed: UsageFeed, onDismiss: () -> Unit) {
}
}
Spacer(Modifier.height(8.dp))
// Scrolls rather than being trimmed: a machine can report any number of windows
// and there can be any number of machines, and a dialog is the one place where
// running out of room is silent. `fill = false` so a short read-out keeps a short
// dialog instead of stretching to the window.
// Scrolls rather than being trimmed: a machine can report any number of windows and
// there can be any number of machines, and a dialog is the one place where running
// out of room is silent. `fill = false` so a short read-out keeps a short dialog.
Column(Modifier.weight(1f, fill = false).verticalScroll(rememberScrollState())) {
UsageBody(feed.snapshots)
}
@@ -93,8 +87,8 @@ private fun UsageBody(state: LoadState<List<UsageSnapshot>>) {
is LoadState.Error -> Text(current.message, color = MaterialTheme.colorScheme.error)
is LoadState.Loaded ->
if (current.value.isEmpty()) {
// Not an error and not a blank screen: no machine offers a paid service,
// so there is genuinely nothing to report and saying so is the answer.
// Not an error and not a blank screen: no machine offers a paid service, so
// there is genuinely nothing to report and saying so is the answer.
Text(
"No machine here runs anything with usage limits.",
style = MaterialTheme.typography.bodyMedium,
@@ -103,17 +97,16 @@ private fun UsageBody(state: LoadState<List<UsageSnapshot>>) {
} else {
// No card around each machine. A card is a step up the surface ladder, and
// inside a dialog -- itself a raised surface -- the step barely renders while
// costing 16dp of padding on every side. What separates one machine from the
// next is the line naming it, which is enough for a list this short.
// costing 16dp on every side. What separates one machine from the next is the
// line naming it.
current.value.forEachIndexed { index, snapshot ->
if (index > 0) {
Spacer(Modifier.height(20.dp))
}
// Machine and service on one line: which account these numbers belong to
// is decided by both together, and stacked as a heading over a subtitle
// they read as a section of their own rather than as the label they are.
// Small and quiet, because the numbers below are what somebody opened
// this to see.
// Machine and service on one line: which account these numbers belong to is
// decided by both together, and stacked as a heading over a subtitle they
// read as a section of their own. Small and quiet, because the numbers
// below are what somebody opened this to see.
Text(
"${snapshot.setupName.ifEmpty { snapshot.setup }} · ${snapshot.provider}",
style = MaterialTheme.typography.bodySmall,
@@ -121,8 +114,8 @@ private fun UsageBody(state: LoadState<List<UsageSnapshot>>) {
)
SnapshotState(snapshot)
snapshot.windows.forEachIndexed { windowIndex, window ->
// Between the bars, not after the last one: a trailing gap here is
// what put a band of empty dialog above the Close button.
// Between the bars, not after the last one: a trailing gap here is what
// put a band of empty dialog above the Close button.
if (windowIndex > 0) {
Spacer(Modifier.height(12.dp))
}
@@ -139,8 +132,7 @@ private fun UsageBody(state: LoadState<List<UsageSnapshot>>) {
*
* The distinction the old single message could not draw. A machine nobody has logged in on is
* working exactly as somebody set it up, so it reads as a plain statement -- marking it would be
* the interface nagging about a decision already made, and would dilute the marks that do mean
* something. Only the two faults are coloured as faults.
* the interface nagging about a decision already made. Only the two faults are coloured as faults.
*/
@Composable
private fun SnapshotState(snapshot: UsageSnapshot) {
@@ -152,8 +144,8 @@ private fun SnapshotState(snapshot: UsageSnapshot) {
style = MaterialTheme.typography.bodyMedium,
color = MaterialTheme.colorScheme.onSurfaceVariant,
)
// Reached but refused, versus never reached at all: different things to go and do,
// so they say different things rather than sharing one "unavailable".
// Reached but refused, versus never reached at all: different things to go and do, so they
// say different things rather than sharing one "unavailable".
"failed" ->
Text(
snapshot.detail ?: "Couldn't read the limits from this machine.",
@@ -200,10 +192,9 @@ private fun WindowBar(window: UsageWindow) {
/**
* "resets in 3h 12m" -- close enough for deciding whether to start a big task -- or nothing.
*
* Null for a window that is not running, which is the case this row has always drawn as nothing and
* is right to: there is no end to report. What it used to get wrong is the other missing case, a
* timestamp that arrived and could not be read: that was printed raw, so a parse failure appeared
* as an ISO string in the middle of a sentence written for a person. Both cases are named in
* Null for a window that is not running: there is no end to report. What this used to get wrong is
* the other missing case, a timestamp that arrived and could not be read -- printed raw, so a parse
* failure appeared as an ISO string in a sentence written for a person. Both are named in
* [WindowEnd], and the session bar words them the same way.
*/
private fun resetLine(window: UsageWindow): String? =
app/androidApp/src/test/kotlin/com/example/aiapp/TranscriptCacheTest.kt
+310
View File
@@ -0,0 +1,310 @@
package com.example.aiapp
import java.io.File
import kotlin.test.Test
import kotlin.test.assertEquals
import kotlin.test.assertFalse
import kotlin.test.assertNull
import kotlin.test.assertTrue
import org.junit.jupiter.api.io.TempDir
/**
* The cache's file logic, which is the half of the transcript cache that can be wrong without
* anything on screen saying so: a page served short, a chunk served across a gap, or a run of lines
* whose recorded coverage does not match what is in it.
*
* Lines here are the shape the server writes -- `{"seq":N,"ts":T,"type":...}` -- because that is
* what the cache reads its two facts off. Nothing parses JSON on either side.
*/
class TranscriptCacheTest {
@field:TempDir lateinit var temp: File
private val said = mutableListOf<String>()
private fun cache() = TranscriptCache(File(temp, "v1/host_8443")) { said += it }
private fun session(id: String = "s") = cache().session(id)
private fun line(seq: Long, type: String = "toolStart") =
"""{"seq":$seq,"ts":1.5,"type":"$type","id":"x"}"""
private fun delta(seq: Long) = line(seq, "assistantText")
private fun dirOf(id: String = "s") = File(temp, "v1/host_8443/$id")
private fun names(id: String = "s") = dirOf(id).list().orEmpty().sorted()
private fun write(name: String, lines: List<String>, id: String = "s") {
dirOf(id).mkdirs()
File(dirOf(id), name).writeText(lines.joinToString("\n", postfix = "\n"))
}
private fun seqs(lines: List<String>?) = lines?.map {
Regex("\"seq\":(\\d+)").find(it)!!.groupValues[1].toLong()
}
@Test
fun an_appended_run_is_one_open_chunk_and_its_newest_line_is_the_tail() {
val cache = session()
(1L..3L).forEach { cache.append(line(it), it) }
cache.flush()
assertEquals(listOf("1-open.raw.jsonl"), names())
assertEquals(CachedTail(3, line(3)), cache.tail())
assertEquals(listOf(line(2), line(3)), cache.newest(2))
// More than there is is what there is, which is a short opening window and not a failure.
assertEquals(3, cache.newest(80).size)
}
@Test
fun a_gap_in_the_stream_closes_the_open_chunk_under_the_end_it_turned_out_to_have() {
val cache = session()
(1L..3L).forEach { cache.append(line(it), it) }
// What a `reset` looks like from here: the next event is not the one after the last.
cache.append(line(90), 90)
cache.flush()
assertEquals(listOf("1-4.raw.jsonl", "90-open.raw.jsonl"), names())
// Nothing is served across the gap: the suffix is the newest chunk alone.
assertEquals(listOf(line(90)), cache.newest(80))
assertEquals(CachedTail(90, line(90)), cache.tail())
}
@Test
fun an_event_already_covered_is_not_written_again() {
val cache = session()
(1L..3L).forEach { cache.append(line(it), it) }
cache.append(line(2), 2)
cache.flush()
assertEquals(listOf(1L, 2L, 3L), seqs(cache.newest(80)))
}
@Test
fun an_adjacent_page_extends_the_suffix_and_a_gap_stops_it() {
val cache = session()
(100L..102L).forEach { cache.append(line(it), it) }
cache.flush()
// Adjacent: its end is the open chunk's first.
assertTrue(cache.storePage((60L..99L).map { line(it) }, 60, 100, rows = true))
assertEquals(listOf(98L, 99L), seqs(cache.page(before = 100, limit = 2, rows = false)))
assertEquals(60L, seqs(cache.newest(80))?.first())
// Behind a gap: kept on disk, because paging usually closes the gap, but never served
// across it.
assertTrue(cache.storePage((1L..9L).map { line(it) }, 1, 10, rows = true))
assertNull(cache.page(before = 10, limit = 5, rows = false))
assertEquals(60L, seqs(cache.newest(200))?.first())
}
@Test
fun a_page_that_overlaps_what_is_here_is_not_stored() {
val cache = session()
cache.append(line(100), 100)
cache.flush()
assertTrue(cache.storePage((60L..99L).map { line(it) }, 60, 100, rows = true))
assertFalse(cache.storePage((50L..79L).map { line(it) }, 50, 80, rows = true))
assertFalse(cache.storePage(emptyList(), 40, 60, rows = true))
assertEquals(listOf("100-open.raw.jsonl", "60-100.rows.jsonl"), names())
}
@Test
fun a_miss_is_null_and_never_an_empty_page() {
val cache = session()
(100L..102L).forEach { cache.append(line(it), it) }
cache.flush()
// At or below where the run starts, so what the reader is scrolling into is the server's.
// An empty list here would be read as the start of the conversation and would stop the
// transcript scrolling back at all.
assertNull(cache.page(before = 100, limit = 40, rows = true))
assertNull(cache.page(before = 40, limit = 40, rows = true))
assertNull(session("never-visited").page(before = 100, limit = 40, rows = true))
}
@Test
fun a_page_starts_from_anywhere_inside_the_run_not_only_at_a_boundary() {
val cache = session()
(1L..10L).forEach { cache.append(line(it), it) }
cache.flush()
// Where a warm open leaves the cursor: in the middle of the live run, because the screen
// drew the newest lines of it. A cache that could only answer at a chunk boundary would
// send this to the server -- and the page that came back would overlap the run and be
// thrown away, so the whole of the scroll back would be fetched again on every visit.
assertEquals(listOf(5L, 6L, 7L), seqs(cache.page(before = 8, limit = 3, rows = false)))
assertEquals((1L..7L).toList(), seqs(cache.page(before = 8, limit = 99, rows = false)))
}
@Test
fun a_page_counted_in_rows_folds_each_delta_run_into_one_and_cuts_only_between_rows() {
val cache = session()
// Two replies of three deltas each, split by a tool call: the same fixture as the
// server's `coalescing_counts_rows_and_joins_delta_runs`.
val lines =
listOf(delta(1), delta(2), delta(3), line(4), delta(5), delta(6), delta(7), line(8))
write("1-9.raw.jsonl", lines)
cache.append(line(9), 9)
cache.flush()
// Three rows: the tool call at 8, the run 5..7, and the tool call at 4. The cut lands
// between rows, so the older run is not started.
assertEquals(
listOf(4L, 5L, 6L, 7L, 8L),
seqs(cache.page(before = 9, limit = 3, rows = true)),
)
// One row is one whole run, however many deltas it is made of.
assertEquals(listOf(8L), seqs(cache.page(before = 9, limit = 1, rows = true)))
// A page of lines counts lines, which is what the anchor restore asks for.
assertEquals(listOf(7L, 8L), seqs(cache.page(before = 9, limit = 2, rows = false)))
}
@Test
fun a_row_page_crosses_a_chunk_boundary_and_stops_short_at_the_oldest_chunk() {
val cache = session()
write("5-9.raw.jsonl", listOf(delta(5), delta(6), line(7), delta(8)))
cache.append(delta(9), 9)
cache.append(line(10), 10)
cache.flush()
// A run straddling the boundary is one row, as it will be once folded.
assertEquals(listOf(8L, 9L, 10L), seqs(cache.page(before = 11, limit = 2, rows = true)))
// Asking for more rows than the suffix holds is a short page, not a failure and not a
// claim that the conversation starts here.
assertEquals((5L..10L).toList(), seqs(cache.page(before = 11, limit = 40, rows = true)))
}
@Test
fun the_floor_for_a_fetch_is_the_nearest_chunk_at_or_below_it() {
val cache = session()
write("1-10.rows.jsonl", (1L..9L).map { line(it) })
write("10-40.rows.jsonl", (10L..39L).map { line(it) })
cache.append(line(90), 90)
cache.flush()
// The run behind the gap, which is what makes the fetched page adjacent to it: a page
// fetched before 90 with a floor of 39 stops at 40 and closes the gap exactly.
assertEquals(40L, cache.coveredUpTo(90))
assertEquals(40L, cache.coveredUpTo(41))
assertEquals(10L, cache.coveredUpTo(10))
// Nothing at or below the oldest chunk's start, so the page is bounded only by its limit.
assertNull(cache.coveredUpTo(9))
}
@Test
fun a_newest_chunk_that_is_not_raw_discards_the_session() {
val cache = session()
write("1-10.rows.jsonl", (1L..9L).map { line(it) })
// Only reachable by dying between closing one live run and opening the next, and there is
// no cursor to be read off a coalesced line -- so the open is a cold one.
assertNull(cache.tail())
assertFalse(dirOf().exists())
}
@Test
fun a_half_written_last_line_is_dropped_and_the_file_repaired() {
val cache = session()
dirOf().mkdirs()
File(dirOf(), "1-open.raw.jsonl").writeText(line(1) + "\n" + line(2) + "\n" + """{"se""")
assertEquals(CachedTail(2, line(2)), cache.tail())
assertEquals(line(1) + "\n" + line(2) + "\n", File(dirOf(), "1-open.raw.jsonl").readText())
// And the run continues from where the good tail left off.
cache.append(line(3), 3)
cache.flush()
assertEquals(listOf(1L, 2L, 3L), seqs(cache.newest(80)))
}
@Test
fun damage_anywhere_else_discards_the_session_when_a_read_reaches_it() {
val cache = session()
write("1-open.raw.jsonl", listOf(line(1), "not ours", line(3)))
// Not seen by the tail, which reads the newest line and stops -- reading a chunk from its
// end is exactly not reading the rest of it, and that is what keeps a warm open cheap on
// a conversation of tens of megabytes.
assertEquals(CachedTail(3, line(3)), cache.tail())
// Reached by a read that walks past it, and there is no honest way to say what a chunk
// covers with a line of it unreadable -- so what is served is nothing, and the session
// opens cold from here on.
assertEquals(emptyList(), cache.newest(80))
assertFalse(dirOf().exists())
assertTrue(said.any { it.contains("damaged") })
}
@Test
fun a_name_this_does_not_recognise_is_ignored() {
val cache = session()
write("notes.txt", listOf("hello"))
write("1-open.raw.jsonl", listOf(line(1)))
assertEquals(CachedTail(1, line(1)), cache.tail())
}
@Test
fun a_chunk_larger_than_one_read_block_is_walked_across_the_boundaries() {
val cache = session()
// Well past the 64 kB block the backwards reader takes at a time, so a page has to be
// stitched across several of them -- including a line that straddles a boundary, which
// is the case nothing else here would notice going wrong.
val padding = "x".repeat(300)
val lines = (1L..500L).map { """{"seq":$it,"ts":1.5,"type":"toolStart","id":"$padding"}""" }
write("1-open.raw.jsonl", lines)
assertEquals(500L, cache.tail()!!.seq)
assertEquals(lines.takeLast(80), cache.newest(80))
assertEquals(lines.subList(0, 400), cache.page(before = 401, limit = 999, rows = false))
// And a non-ASCII line, whose bytes a naive split could cut through a character.
val accented = """{"seq":501,"ts":1.5,"type":"assistantText","delta":"héllo — ok"}"""
cache.append(accented, 501)
cache.flush()
assertEquals(accented, cache.tail()!!.line)
}
@Test
fun eviction_takes_the_least_recently_touched_and_never_the_one_on_screen() {
val cache = cache()
listOf("old", "middle", "open").forEachIndexed { at, id ->
write("1-open.raw.jsonl", List(50) { line(it + 1L) }, id = id)
dirOf(id).setLastModified(1_000_000L + at * 1000L)
}
val each = dirOf("old").walkTopDown().filter { it.isFile }.sumOf { it.length() }
// Room for two of the three, so the oldest goes -- and the session being read never does,
// however long ago it was last touched.
cache.evictToBudget(keep = "open", budget = each * 2)
assertEquals(listOf("middle", "open"), File(temp, "v1/host_8443").list()!!.sorted())
cache.evictToBudget(keep = "open", budget = 0)
assertEquals(listOf("open"), File(temp, "v1/host_8443").list()!!.sorted())
}
@Test
fun retaining_deletes_exactly_the_sessions_the_server_no_longer_lists() {
val cache = cache()
listOf("a", "b", "c").forEach { write("1-open.raw.jsonl", listOf(line(1)), id = it) }
cache.retainOnly(setOf("a", "c"))
assertEquals(listOf("a", "c"), File(temp, "v1/host_8443").list()!!.sorted())
}
@Test
fun size_and_purge_are_the_two_halves_of_the_reload_button() {
val cache = session()
assertEquals(0L, cache.bytes())
(1L..5L).forEach { cache.append(line(it), it) }
cache.flush()
assertTrue(cache.bytes() > 0)
cache.purge()
assertEquals(0L, cache.bytes())
assertNull(cache.tail())
// And the session is usable again straight afterwards, which is what a reload does next.
cache.append(line(9), 9)
cache.flush()
assertEquals(listOf(9L), seqs(cache.newest(80)))
}
}