Take a strong widget to depend on, and use the question mark

`depend_on_size` took a bare `WidgetId`, which any id at all satisfies.
It takes a `&StrongWidget` now, so `DrawResult` carries the handle it
was drawn from rather than an id copied out of it and nothing can claim
a dependency on a widget it does not hold.

`UiSpan::outside` matched on a pair of `Option`s where `?` says it. It
was written that way while the method was still `const`, and it is not.

No call site changed. Checked: fmt, clippy and 35 tests; `tabs`, `view`,
`minimal` and `text` render unchanged, and the live sway resize round
trip still matches a cold start at each size.

Cargo.lock

@@ -567,9 +567,9 @@ dependencies = [
 
 [[package]]
 name = "dlib"
-version = "0.5.3"
+version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ab8ecd87370524b461f8557c119c405552c396ed91fc0a8eec68679eab26f94a"
+checksum = "330c60081dcc4c72131f8eb70510f1ac07223e5d4163db481a04a0befcffa412"
 dependencies = [
  "libloading",
 ]
@@ -2158,9 +2158,9 @@ checksum = "a993555f31e5a609f617c12db6250dedcac1b0a85076912c436e6fc9b2c8e6a3"
 
 [[package]]
 name = "quick-xml"
-version = "0.41.0"
+version = "0.38.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e660451e55124f798a69a5af3f49ccfbefbd41910eefd25caf2393e1f3473ec1"
+checksum = "b66c2058c55a409d601666cffe35f04333cf1013010882cec174a7467cd4e21c"
 dependencies = [
  "memchr",
 ]
@@ -2353,15 +2353,6 @@ version = "0.8.52"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0c6a884d2998352bb4daf0183589aec883f16a6da1f4dde84d8e2e9a5409a1ce"
 
-[[package]]
-name = "rig-input"
-version = "0.1.0"
-dependencies = [
- "iris",
- "wayland-client",
- "wayland-protocols-wlr",
-]
-
 [[package]]
 name = "roxmltree"
 version = "0.21.1"
@@ -2918,9 +2909,9 @@ dependencies = [
 
 [[package]]
 name = "wayland-backend"
-version = "0.3.17"
+version = "0.3.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "38a91b4eaddff87b1cd1074985e3713da4af2c49742d1b356b2c01670a67a078"
+checksum = "fee64194ccd96bf648f42a65a7e589547096dfa702f7cadef84347b66ad164f9"
 dependencies = [
  "cc",
  "downcast-rs",
@@ -2932,9 +2923,9 @@ dependencies = [
 
 [[package]]
 name = "wayland-client"
-version = "0.31.15"
+version = "0.31.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e3c36a0f861ad76d0901f2800b46321410d9f73f2ea88aac0650d86c32688073"
+checksum = "b8e6faa537fbb6c186cb9f1d41f2f811a4120d1b57ec61f50da451a0c5122bec"
 dependencies = [
  "bitflags 2.10.0",
  "rustix 1.1.3",
@@ -2966,9 +2957,9 @@ dependencies = [
 
 [[package]]
 name = "wayland-protocols"
-version = "0.32.13"
+version = "0.32.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23d0c813de3daa2ed6520af85a3bd49b0e722a3078506899aa9686fea58dc4b6"
+checksum = "baeda9ffbcfc8cd6ddaade385eaf2393bd2115a69523c735f12242353c3df4f3"
 dependencies = [
  "bitflags 2.10.0",
  "wayland-backend",
@@ -2991,9 +2982,9 @@ dependencies = [
 
 [[package]]
 name = "wayland-protocols-wlr"
-version = "0.3.12"
+version = "0.3.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "eb04e52f7836d7c7976c78ca0250d61e33873c34156a2a1fc9474828ec268234"
+checksum = "e9597cdf02cf0c34cd5823786dce6b5ae8598f05c2daf5621b6e178d4f7345f3"
 dependencies = [
  "bitflags 2.10.0",
  "wayland-backend",
@@ -3004,9 +2995,9 @@ dependencies = [
 
 [[package]]
 name = "wayland-scanner"
-version = "0.31.11"
+version = "0.31.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "338e30461b3a2b67d70eb30a6d89f8e0c93a833e07d2ae89085cd070c4a00ac0"
+checksum = "5423e94b6a63e68e439803a3e153a9252d5ead12fd853334e2ad33997e3889e3"
 dependencies = [
  "proc-macro2",
  "quick-xml",
@@ -3015,9 +3006,9 @@ dependencies = [
 
 [[package]]
 name = "wayland-sys"
-version = "0.31.11"
+version = "0.31.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d8eab23fefc9e41f8e841df4a9c707e8a8c4ed26e944ef69297184de2785e3be"
+checksum = "1e6dbfc3ac5ef974c92a2235805cc0114033018ae1290a72e474aa8b28cbbdfd"
 dependencies = [
  "dlib",
  "log",

Cargo.toml

@@ -20,7 +20,7 @@ tokio = { workspace = true, features = ["sync", "rt", "rt-multi-thread"] }
 tokio = { workspace = true, features = ["sync", "rt", "rt-multi-thread", "time"] }
 
 [workspace]
-members = ["core", "macro", "rig-input"]
+members = ["core", "macro"]
 
 [workspace.package]
 version = "0.1.0"
@@ -40,5 +40,3 @@ arboard = "3.6.1"
 iris-core = { path = "core" }
 iris-macro = { path = "macro" }
 tokio = "1.49.0"
-wayland-client = "0.31.15"
-wayland-protocols-wlr = { version = "0.3.12", features = ["client"] }

core/src/render/data.rs

@@ -1,10 +1,11 @@
-use crate::{UiRegion, util::Id, util::Vec2};
+use crate::{UiRegion, util::Id};
 use wgpu::*;
 
 #[repr(C)]
 #[derive(Copy, Clone, bytemuck::Pod, bytemuck::Zeroable, Default)]
 pub struct WindowUniform {
-    pub dim: Vec2,
+    pub width: f32,
+    pub height: f32,
 }
 
 #[repr(C)]
@@ -12,17 +13,15 @@ pub struct WindowUniform {
 pub struct PrimitiveInstance {
     pub region: UiRegion,
     pub mask_idx: MaskIdx,
-    pub move_idx: MoveIdx,
 }
 
 impl PrimitiveInstance {
-    const ATTRIBS: [VertexAttribute; 6] = vertex_attr_array![
+    const ATTRIBS: [VertexAttribute; 5] = vertex_attr_array![
         0 => Float32x2,
         1 => Float32x2,
         2 => Float32x2,
         3 => Float32x2,
         4 => Uint32,
-        5 => Uint32,
     ];
 
     pub fn desc() -> VertexBufferLayout<'static> {
@@ -44,45 +43,4 @@ impl MaskIdx {
 #[derive(Debug, Copy, Clone, bytemuck::Pod, bytemuck::Zeroable)]
 pub struct Mask {
     pub region: UiRegion,
-    pub move_idx: MoveIdx,
-}
-
-/// Its own type rather than another `Id<u32>`, because it sits beside
-/// `MaskIdx` in an instance and the two must not be swappable.
-#[repr(transparent)]
-#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash, bytemuck::Pod, bytemuck::Zeroable)]
-pub struct MoveIdx(u32);
-
-impl MoveIdx {
-    pub const NONE: Self = Self(u32::MAX);
-
-    pub(crate) fn slot(idx: usize) -> Self {
-        Self(idx as u32)
-    }
-
-    pub(crate) fn idx(self) -> usize {
-        self.0 as usize
-    }
-}
-
-/// One link of the chain a primitive's position is resolved through: a
-/// translation in physical pixels, and the slot it is relative to. Moving a
-/// subtree writes its own slot and nothing else.
-#[repr(C)]
-#[derive(Debug, Copy, Clone)]
-pub struct MoveOffset {
-    pub delta: Vec2,
-    pub parent: MoveIdx,
-}
-
-unsafe impl bytemuck::Pod for MoveOffset {}
-unsafe impl bytemuck::Zeroable for MoveOffset {}
-
-impl MoveOffset {
-    pub fn root(parent: MoveIdx) -> Self {
-        Self {
-            delta: Vec2::ZERO,
-            parent,
-        }
-    }
 }

core/src/render/mod.rs

@@ -17,7 +17,7 @@ mod texture;
 mod util;
 
 pub use atlas::*;
-pub use data::{Mask, MaskIdx, MoveIdx, MoveOffset};
+pub use data::{Mask, MaskIdx};
 pub use primitive::*;
 
 const PRELUDE: &str = include_str!("./shader/prelude.wgsl");
@@ -34,7 +34,6 @@ pub struct UiRenderNode {
     active: Vec<usize>,
     window_buffer: Buffer,
     masks: ArrBuf<Mask>,
-    moves: ArrBuf<MoveOffset>,
 }
 
 struct RenderLayer {
@@ -128,35 +127,32 @@ impl UiRenderNode {
         for primitive in &mut self.primitives {
             primitive.render.update(ui);
         }
-        let mut regroup = false;
         if ui.masks.changed {
             ui.masks.changed = false;
-            regroup |= self.masks.update(device, queue, &ui.masks[..]);
-        }
-        if ui_render.moves.changed {
-            ui_render.moves.changed = false;
-            regroup |= self.moves.update(device, queue, ui_render.moves.entries());
-        }
-        if regroup {
-            self.shared_group = Self::shared_group(
-                device,
-                &self.shared_layout,
-                &self.window_buffer,
-                &self.masks,
-                &self.moves,
-            );
+            if self.masks.update(device, queue, &ui.masks[..]) {
+                self.shared_group = Self::shared_group(
+                    device,
+                    &self.shared_layout,
+                    &self.window_buffer,
+                    &self.masks,
+                );
+            }
         }
     }
 
     pub fn resize(&mut self, size: impl Into<Vec2>, queue: &Queue) {
         let size = size.into();
-        let slice = &[WindowUniform { dim: size }];
+        let slice = &[WindowUniform {
+            width: size.x,
+            height: size.y,
+        }];
         queue.write_buffer(&self.window_buffer, 0, bytemuck::cast_slice(slice));
     }
 
     pub fn new(device: &Device, config: &SurfaceConfiguration) -> Self {
         let window_uniform = WindowUniform {
-            dim: Vec2::new(config.width as f32, config.height as f32),
+            width: config.width as f32,
+            height: config.height as f32,
         };
         let window_buffer = device.create_buffer_init(&BufferInitDescriptor {
             label: Some("window"),
@@ -170,13 +166,7 @@ impl UiRenderNode {
             BufferUsages::STORAGE | BufferUsages::COPY_DST,
             "ui masks",
         );
-        let moves = ArrBuf::new(
-            device,
-            BufferUsages::STORAGE | BufferUsages::COPY_DST,
-            "ui move offsets",
-        );
-        let shared_group =
-            Self::shared_group(device, &shared_layout, &window_buffer, &masks, &moves);
+        let shared_group = Self::shared_group(device, &shared_layout, &window_buffer, &masks);
 
         Self {
             shared_layout,
@@ -187,7 +177,6 @@ impl UiRenderNode {
             layers: HashMap::default(),
             active: Vec::new(),
             masks,
-            moves,
         }
     }
 
@@ -263,8 +252,7 @@ impl UiRenderNode {
         })
     }
 
-    /// What every draw in the ui is given: the window, the masks and the
-    /// move chain every position is resolved through.
+    /// What every draw in the ui is given: the window and the masks.
     fn shared_layout(device: &Device) -> BindGroupLayout {
         device.create_bind_group_layout(&BindGroupLayoutDescriptor {
             entries: &[
@@ -288,16 +276,6 @@ impl UiRenderNode {
                     },
                     count: None,
                 },
-                BindGroupLayoutEntry {
-                    binding: 2,
-                    visibility: ShaderStages::VERTEX | ShaderStages::FRAGMENT,
-                    ty: BindingType::Buffer {
-                        ty: BufferBindingType::Storage { read_only: true },
-                        has_dynamic_offset: false,
-                        min_binding_size: BufferSize::new(size_of::<MoveOffset>() as u64),
-                    },
-                    count: None,
-                },
             ],
             label: Some("ui shared"),
         })
@@ -308,7 +286,6 @@ impl UiRenderNode {
         layout: &BindGroupLayout,
         window: &Buffer,
         masks: &ArrBuf<Mask>,
-        moves: &ArrBuf<MoveOffset>,
     ) -> BindGroup {
         device.create_bind_group(&BindGroupDescriptor {
             layout,
@@ -321,10 +298,6 @@ impl UiRenderNode {
                     binding: 1,
                     resource: masks.buffer.as_entire_binding(),
                 },
-                BindGroupEntry {
-                    binding: 2,
-                    resource: moves.buffer.as_entire_binding(),
-                },
             ],
             label: Some("ui shared"),
         })

core/src/render/primitive.rs

@@ -3,7 +3,7 @@ use std::{any::TypeId, marker::PhantomData};
 use crate::{
     Color, TextureHandle, UiData, UiRegion, WidgetId,
     render::{
-        data::{MaskIdx, MoveIdx, PrimitiveInstance},
+        data::{MaskIdx, PrimitiveInstance},
         page::GlyphRender,
         texture::ImageRender,
     },
@@ -246,7 +246,6 @@ impl LayerDraws {
             primitive,
             region,
             mask_idx,
-            move_idx,
         }: PrimitiveInst<P>,
     ) -> PrimitiveHandle {
         self.updated = true;
@@ -259,11 +258,7 @@ impl LayerDraws {
             .get_or_insert_with(InstanceList::new::<P>)
             .push(
                 id,
-                PrimitiveInstance {
-                    region,
-                    mask_idx,
-                    move_idx,
-                },
+                PrimitiveInstance { region, mask_idx },
                 bytemuck::bytes_of(&primitive),
             );
         PrimitiveHandle {
@@ -309,7 +304,6 @@ pub struct PrimitiveInst<P> {
     pub primitive: P,
     pub region: UiRegion,
     pub mask_idx: MaskIdx,
-    pub move_idx: MoveIdx,
 }
 
 pub struct PrimitiveChange {
@@ -353,7 +347,7 @@ impl RectPrimitive {
 
 /// `color` is multiplied by the atlas alpha for a mask glyph; a colour glyph
 /// takes the texel unchanged, which `GlyphEntry::IS_COLORED` selects.
-#[repr(C)]
+#[repr(C, align(8))]
 #[derive(Debug, Copy, Clone)]
 pub struct GlyphPrimitive {
     pub uv_min: Vec2,
@@ -364,8 +358,8 @@ pub struct GlyphPrimitive {
     pub flags: u32,
 }
 
-// Manual rather than derived: `Vec2`'s alignment leaves four bytes of padding
-// here, which is how WGSL lays the struct out.
+// Manual rather than derived: the align(8) leaves four bytes of padding, which
+// is how WGSL lays the struct out.
 unsafe impl bytemuck::Pod for GlyphPrimitive {}
 unsafe impl bytemuck::Zeroable for GlyphPrimitive {}
 impl Primitive for GlyphPrimitive {

core/src/render/shader/prelude.wgsl

@@ -7,8 +7,6 @@
 var<uniform> window: WindowUniform;
 @group(0) @binding(1)
 var<storage> masks: array<Mask>;
-@group(0) @binding(2)
-var<storage> move_offsets: array<MoveOffset>;
 
 struct WindowUniform {
     dim: vec2<f32>,
@@ -17,32 +15,6 @@ struct WindowUniform {
 struct Mask {
     x: UiSpan,
     y: UiSpan,
-    move_idx: u32,
-}
-
-struct MoveOffset {
-    delta: vec2<f32>,
-    parent: u32,
-}
-
-const MOVE_NONE: u32 = 4294967295u;
-// Keep in step with `iris_core::CHAIN_LIMIT`. It bounds a malformed cycle
-// rather than any real tree, and the CPU walk uses the same number so both
-// resolve a deep one the same way.
-const CHAIN_LIMIT: u32 = 64u;
-
-fn resolve_move(idx: u32) -> vec2<f32> {
-    var total = vec2<f32>(0.0, 0.0);
-    var at = idx;
-    for (var step = 0u; step < CHAIN_LIMIT; step++) {
-        if at == MOVE_NONE {
-            break;
-        }
-        let entry = move_offsets[at];
-        total += entry.delta;
-        at = entry.parent;
-    }
-    return total;
 }
 
 struct UiSpan {
@@ -61,7 +33,6 @@ struct InstanceInput {
     @location(2) y_start: vec2<f32>,
     @location(3) y_end: vec2<f32>,
     @location(4) mask_idx: u32,
-    @location(5) move_idx: u32,
 }
 
 struct VertexOutput {
@@ -86,9 +57,8 @@ fn vs_main(
     let bot_right_rel = vec2(in.x_end.x, in.y_end.x);
     let bot_right_abs = vec2(in.x_end.y, in.y_end.y);
 
-    let moved = resolve_move(in.move_idx);
-    let top_left = floor(top_left_rel * window.dim) + floor(top_left_abs + moved);
-    let bot_right = floor(bot_right_rel * window.dim) + floor(bot_right_abs + moved);
+    let top_left = floor(top_left_rel * window.dim) + floor(top_left_abs);
+    let bot_right = floor(bot_right_rel * window.dim) + floor(bot_right_abs);
     let size = bot_right - top_left;
 
     let uv = vec2<f32>(
@@ -116,11 +86,8 @@ fn masked(in: VertexOutput, color: vec4<f32>) -> vec4<f32> {
     let br = vec2(mask.x.end.rel, mask.y.end.rel);
     let br_abs = vec2(mask.x.end.abs, mask.y.end.abs);
 
-    // Its own chain, not the drawn primitive's, so a stationary viewport
-    // clips content that moves inside it.
-    let moved = resolve_move(mask.move_idx);
-    let top_left = floor(tl * window.dim) + floor(tl_abs + moved);
-    let bot_right = floor(br * window.dim) + floor(br_abs + moved);
+    let top_left = floor(tl * window.dim) + floor(tl_abs);
+    let bot_right = floor(br * window.dim) + floor(br_abs);
     let pos = in.clip_position.xy;
     if pos.x < top_left.x || pos.x > bot_right.x || pos.y < top_left.y || pos.y > bot_right.y {
         return color * 0.0;

core/src/ui/active.rs

@@ -1,4 +1,4 @@
-use crate::{LayerId, MaskIdx, MoveIdx, PrimitiveHandle, Size, TextureHandle, UiRegion, WidgetId};
+use crate::{LayerId, MaskIdx, PrimitiveHandle, Size, TextureHandle, UiRegion, WidgetId};
 
 /// important non rendering data for retained drawing
 #[derive(Debug)]
@@ -15,8 +15,6 @@ pub struct ActiveData {
     pub size_deps: Vec<WidgetId>,
     /// Whether it read the output's size, and so is wrong when that changes.
     pub reads_output: bool,
-    /// The move slot its primitives are positioned through.
-    pub move_idx: MoveIdx,
     pub mask: MaskIdx,
     pub layer: LayerId,
 }

core/src/ui/mod.rs

@@ -1,14 +1,7 @@
 use crate::{
-    Mask, MoveIdx, MoveOffset, PrimitiveRegistry, TextData, Textures, WeakWidget, WidgetId,
-    Widgets,
-    util::{Arena, Id, TrackedArena, Vec2},
+    Mask, PrimitiveRegistry, TextData, Textures, WeakWidget, WidgetId, Widgets, util::TrackedArena,
 };
 
-/// How far the shader will walk a move chain. It bounds a malformed cycle
-/// rather than any real tree; `Moves::resolve` uses the same number so the
-/// two agree on what a deep tree resolves to.
-pub const CHAIN_LIMIT: u32 = 64;
-
 mod active;
 mod painter;
 mod render_state;
@@ -27,65 +20,6 @@ pub struct UiData {
     pub masks: TrackedArena<Mask, u32>,
 }
 
-/// Where each widget's drawing sits relative to its parent's slot, so moving
-/// a subtree writes one entry rather than every descendant's primitives.
-#[derive(Default)]
-pub struct Moves {
-    arena: Arena<MoveOffset, u32>,
-    pub changed: bool,
-}
-
-impl Moves {
-    pub fn push(&mut self, parent: MoveIdx) -> MoveIdx {
-        self.changed = true;
-        MoveIdx::slot(self.arena.push(MoveOffset::root(parent)).idx())
-    }
-
-    pub fn remove(&mut self, idx: MoveIdx) {
-        self.changed = true;
-        self.arena.remove(Id::preset(idx.idx() as u32));
-    }
-
-    /// Sets a slot's translation, in physical pixels, relative to its parent.
-    pub fn set(&mut self, idx: MoveIdx, delta: Vec2) {
-        let entry = self.arena.get_mut(Id::preset(idx.idx() as u32));
-        if entry.delta != delta {
-            entry.delta = delta;
-            self.changed = true;
-        }
-    }
-
-    /// The translation a primitive in `idx` has accumulated, which is the
-    /// same walk the vertex shader does.
-    pub fn resolve(&self, idx: MoveIdx) -> Vec2 {
-        let mut total = Vec2::ZERO;
-        let mut at = idx;
-        for _ in 0..CHAIN_LIMIT {
-            if at == MoveIdx::NONE {
-                return total;
-            }
-            let entry = self.arena[at.idx()];
-            total += entry.delta;
-            at = entry.parent;
-        }
-        debug_assert!(
-            at == MoveIdx::NONE,
-            "a move chain longer than {CHAIN_LIMIT} resolves to the wrong place, \
-             and the shader stops at the same depth"
-        );
-        total
-    }
-
-    pub fn entries(&self) -> &[MoveOffset] {
-        &self.arena
-    }
-
-    pub fn clear(&mut self) {
-        self.changed = true;
-        self.arena = Arena::default();
-    }
-}
-
 pub trait UiRsc {
     fn ui(&self) -> &UiData;
     fn ui_mut(&mut self) -> &mut UiData;

core/src/ui/painter.rs

@@ -2,8 +2,8 @@ use crate::{
     Axis, Len, RenderedText, Size, StrongWidget, TextAttrs, TextBuffer, TextData, TextureHandle,
     UiRegion, UiRenderState, UiRsc, UiScalar, UiVec2, WidgetId,
     render::{
-        GlyphPrimitive, Mask, MaskIdx, MoveIdx, Primitive, PrimitiveHandle, PrimitiveInst,
-        PrimitiveKind, TexturePrimitive,
+        GlyphPrimitive, Mask, MaskIdx, Primitive, PrimitiveHandle, PrimitiveInst, PrimitiveKind,
+        TexturePrimitive,
     },
     util::Vec2,
 };
@@ -21,8 +21,6 @@ pub struct Painter<'a> {
     /// The children whose size this widget read while drawing.
     pub(super) size_deps: Vec<WidgetId>,
     pub(super) reads_output: bool,
-    /// The move slot this widget's primitives are positioned through.
-    pub(super) move_idx: MoveIdx,
     pub layer: usize,
     pub(super) id: WidgetId,
 }
@@ -43,7 +41,6 @@ impl<'a> Painter<'a> {
                 primitive,
                 region,
                 mask_idx: self.mask,
-                move_idx: self.move_idx,
             },
         );
         self.push_primitive(h);
@@ -70,10 +67,7 @@ impl<'a> Painter<'a> {
 
     pub fn set_mask(&mut self, region: UiRegion) {
         assert!(self.mask == MaskIdx::NONE);
-        self.mask = self.rsc.ui_mut().masks.push(Mask {
-            region,
-            move_idx: self.move_idx,
-        });
+        self.mask = self.rsc.ui_mut().masks.push(Mask { region });
     }
 
     /// Draws a widget within this widget's region.

core/src/ui/render_state.rs

@@ -1,6 +1,6 @@
 use crate::{
-    ActiveData, Axis, DrawLayers, IdLike, MaskIdx, MoveIdx, Moves, OnResize, Painter, PixelRegion,
-    Remap, Size, StrongWidget, UiRegion, UiRsc, WidgetId, Widgets,
+    ActiveData, Axis, DrawLayers, IdLike, MaskIdx, OnResize, Painter, PixelRegion, Remap, Size,
+    StrongWidget, UiRegion, UiRsc, WidgetId, Widgets,
     util::{HashMap, HashSet, Vec2, forget_ref},
 };
 
@@ -12,10 +12,6 @@ pub struct UiRenderState {
     old_root: Option<WidgetId>,
     resized: bool,
     draw_started: HashSet<WidgetId>,
-    /// A widget's move slot, which outlives any one `ActiveData`: a redraw
-    /// replaces that while its children go on pointing at the slot.
-    slots: HashMap<WidgetId, MoveIdx>,
-    pub moves: Moves,
 }
 
 impl UiRenderState {
@@ -27,8 +23,6 @@ impl UiRenderState {
             old_root: None,
             resized: false,
             draw_started: Default::default(),
-            slots: Default::default(),
-            moves: Default::default(),
         }
     }
 
@@ -109,8 +103,6 @@ impl UiRenderState {
         }
 
         // draw widget
-        let move_idx = self.move_slot(id, parent);
-        self.moves.set(move_idx, Vec2::ZERO);
         rsc.widgets_mut().needs_redraw.remove(&id);
         self.draw_started.insert(id);
 
@@ -125,7 +117,6 @@ impl UiRenderState {
             children: Vec::new(),
             size_deps: Vec::new(),
             reads_output: false,
-            move_idx,
             rsc,
         };
 
@@ -143,7 +134,6 @@ impl UiRenderState {
             children,
             size_deps,
             reads_output,
-            move_idx,
             layer,
             id,
         } = painter;
@@ -165,7 +155,6 @@ impl UiRenderState {
             children,
             size_deps,
             reads_output,
-            move_idx,
             mask,
             layer,
         };
@@ -182,20 +171,6 @@ impl UiRenderState {
         size
     }
 
-    /// The slot a widget's drawing is positioned through, made on its first
-    /// draw and kept until it stops being drawn.
-    fn move_slot(&mut self, id: WidgetId, parent: Option<WidgetId>) -> MoveIdx {
-        if let Some(&idx) = self.slots.get(&id) {
-            return idx;
-        }
-        let parent = parent
-            .and_then(|p| self.slots.get(&p).copied())
-            .unwrap_or(MoveIdx::NONE);
-        let idx = self.moves.push(parent);
-        self.slots.insert(id, idx);
-        idx
-    }
-
     /// The drawing a widget already has, kept for a new box if the box has not
     /// changed in a way it depends on.
     fn try_reuse(&mut self, id: WidgetId, region: UiRegion, rsc: &dyn UiRsc) -> Option<Size> {
@@ -203,18 +178,12 @@ impl UiRenderState {
             return None;
         }
         let active = self.active.get(&id)?;
-        let (size, old, slot) = (active.size, active.region, active.move_idx);
-        // TODO: epsilon?
-        if old.size() == region.size() {
-            // The right shape and only somewhere else, which is one slot to
-            // write however much is under it. Both boxes are in the
-            // coordinates its parent drew, so the chain above applies alike.
-            let moved =
-                region.to_px(self.output_size).top_left - old.to_px(self.output_size).top_left;
-            self.moves.set(slot, moved);
+        let (size, old) = (active.size, active.region);
+        if old == region {
             return Some(size);
         }
-        if !self.reusable(id, region, rsc) {
+        // TODO: epsilon?
+        if old.size() != region.size() && !self.reusable(id, region, rsc) {
             return None;
         }
         // Its drawing stands, if the new box can be reached from the old one.
@@ -259,9 +228,6 @@ impl UiRenderState {
         })
     }
 
-    /// Rewrites a subtree's regions into a new box, for a change a slot
-    /// cannot express. Every region it rewrites is a region some slot was a
-    /// delta from, so those go back to zero.
     fn mov(&mut self, id: WidgetId, remap: &Remap) {
         let active = self.active.get_mut(&id).unwrap();
         for h in &active.primitives {
@@ -269,7 +235,6 @@ impl UiRenderState {
             *region = remap.apply(*region);
         }
         active.region = remap.apply(active.region);
-        self.moves.set(active.move_idx, Vec2::ZERO);
         // SAFETY: children cannot be recursive
         let children = unsafe { forget_ref(&active.children) };
         for child in children {
@@ -303,10 +268,6 @@ impl UiRenderState {
                 self.remove_rec(*c, rsc);
             }
         }
-        // After the descendants, whose slots name this one as their parent.
-        if let Some(idx) = self.slots.remove(&id) {
-            self.moves.remove(idx);
-        }
         inst
     }
 
@@ -314,8 +275,6 @@ impl UiRenderState {
         for (_, active) in self.active.drain() {
             rsc.on_undraw(&active);
         }
-        self.slots.clear();
-        self.moves.clear();
         self.layers.clear();
         rsc.widgets_mut().needs_redraw.clear();
         rsc.free();
@@ -363,16 +322,9 @@ impl UiRenderState {
         }
     }
 
-    /// Where a widget is on screen: the box it drew against plus whatever the
-    /// chain above has moved since, which is the walk the vertex shader does.
     pub fn window_region(&self, id: &impl IdLike) -> Option<PixelRegion> {
-        let active = self.active.get(&id.id())?;
-        let moved = self.moves.resolve(active.move_idx);
-        let region = active.region.to_px(self.output_size);
-        Some(PixelRegion {
-            top_left: region.top_left + moved,
-            bot_right: region.bot_right + moved,
-        })
+        let region = self.active.get(&id.id())?.region;
+        Some(region.to_px(self.output_size))
     }
 
     /// redraws a widget that's currently active (drawn)

core/src/util/arena.rs

@@ -34,10 +34,6 @@ impl<T, I: IdNum> Arena<T, I> {
         self.tracker.free(id);
         self.data[i]
     }
-
-    pub fn get_mut(&mut self, id: Id<I>) -> &mut T {
-        &mut self.data[id.idx()]
-    }
 }
 
 impl<T, I: IdNum> Default for Arena<T, I> {

core/src/util/vec2.rs

@@ -1,11 +1,7 @@
 use crate::util::impl_op;
 use std::{hash::Hash, ops::*};
 
-/// `align(8)` because that is WGSL's alignment for a `vec2<f32>`, so any GPU
-/// struct holding one is laid out the way its shader reads it without having
-/// to say so itself. Those structs still need a manual `unsafe impl Pod`,
-/// since the trailing padding this introduces is what `derive(Pod)` refuses.
-#[repr(C, align(8))]
+#[repr(C)]
 #[derive(Clone, Copy, PartialEq, Default, bytemuck::Pod, bytemuck::Zeroable)]
 pub struct Vec2 {
     pub x: f32,

rig-input/Cargo.toml

@@ -1,16 +0,0 @@
-[package]
-name = "rig-input"
-version.workspace = true
-edition.workspace = true
-
-# Replays `.touch` recordings through Wayland's virtual-pointer protocol;
-# headless sway has no input devices for coordinate-driving tools to move.
-[[bin]]
-name = "replay-touch"
-path = "src/main.rs"
-
-[dependencies]
-# Share the harness parser so both ways of replaying read a file the same.
-iris = { path = ".." }
-wayland-client = { workspace = true }
-wayland-protocols-wlr = { workspace = true }

rig-input/src/main.rs

@@ -1,141 +0,0 @@
-use iris::harness::{TouchAction, TouchScript};
-use std::time::Duration;
-use wayland_client::protocol::wl_pointer::ButtonState;
-use wayland_client::protocol::{wl_registry, wl_seat};
-use wayland_client::{Connection, Dispatch, QueueHandle, delegate_noop};
-use wayland_protocols_wlr::virtual_pointer::v1::client::{
-    zwlr_virtual_pointer_manager_v1::ZwlrVirtualPointerManagerV1,
-    zwlr_virtual_pointer_v1::ZwlrVirtualPointerV1,
-};
-
-const BTN_LEFT: u32 = 0x110;
-
-const SETTLE: Duration = Duration::from_millis(200);
-
-#[derive(Default)]
-struct Globals {
-    seat: Option<wl_seat::WlSeat>,
-    manager: Option<ZwlrVirtualPointerManagerV1>,
-}
-
-impl Dispatch<wl_registry::WlRegistry, ()> for Globals {
-    fn event(
-        state: &mut Self,
-        registry: &wl_registry::WlRegistry,
-        event: wl_registry::Event,
-        _: &(),
-        _: &Connection,
-        qh: &QueueHandle<Self>,
-    ) {
-        let wl_registry::Event::Global {
-            name,
-            interface,
-            version,
-        } = event
-        else {
-            return;
-        };
-        match interface.as_str() {
-            "wl_seat" => {
-                state.seat = Some(registry.bind(name, version.min(7), qh, ()));
-            }
-            "zwlr_virtual_pointer_manager_v1" => {
-                state.manager = Some(registry.bind(name, version.min(2), qh, ()));
-            }
-            _ => {}
-        }
-    }
-}
-
-delegate_noop!(Globals: ignore wl_seat::WlSeat);
-delegate_noop!(Globals: ZwlrVirtualPointerManagerV1);
-delegate_noop!(Globals: ZwlrVirtualPointerV1);
-
-fn main() {
-    let args: Vec<String> = std::env::args().skip(1).collect();
-    let [width, height, path] = args.as_slice() else {
-        eprintln!("usage: replay-touch WIDTH HEIGHT FILE");
-        std::process::exit(2);
-    };
-    let (width, height) = (parse(width, "WIDTH"), parse(height, "HEIGHT"));
-    let text = std::fs::read_to_string(path)
-        .unwrap_or_else(|e| fail(&format!("could not read {path}: {e}")));
-    let script = TouchScript::parse(&text).unwrap_or_else(|e| fail(&e));
-
-    let conn = Connection::connect_to_env().unwrap_or_else(|e| {
-        fail(&format!(
-            "no wayland display ({e}); is WAYLAND_DISPLAY set?"
-        ))
-    });
-    let mut queue = conn.new_event_queue();
-    let qh = queue.handle();
-    let display = conn.display();
-    display.get_registry(&qh, ());
-    let mut globals = Globals::default();
-    queue
-        .roundtrip(&mut globals)
-        .unwrap_or_else(|e| fail(&format!("wayland roundtrip failed: {e}")));
-
-    let manager = globals.manager.as_ref().unwrap_or_else(|| {
-        fail(
-            "this compositor does not offer zwlr_virtual_pointer_manager_v1, so a pointer cannot \
-             be synthesised; sway and every wlroots compositor do",
-        )
-    });
-    let pointer = manager.create_virtual_pointer(globals.seat.as_ref(), &qh, ());
-
-    // Put the pointer where the gesture starts and let the compositor
-    // settle before anything is pressed. Without this the press is
-    // dropped: sway has just learned about this pointer, and a button
-    // sent in the same breath as the motion that first puts it over a
-    // window arrives before there is a focused surface to send it to --
-    // winit sees `CursorEntered`, the moves and the *release*, never the
-    // press, so the gesture reads as a hover and nothing scrolls. Found
-    // by printing winit's own events; the settle is what fixed it.
-    if let Some(first) = script.samples.first() {
-        pointer.motion_absolute(0, first.pos.x as u32, first.pos.y as u32, width, height);
-        pointer.frame();
-        conn.flush()
-            .unwrap_or_else(|e| fail(&format!("flush: {e}")));
-        std::thread::sleep(SETTLE);
-    }
-
-    let mut previous = 0;
-    for sample in &script.samples {
-        std::thread::sleep(Duration::from_millis(sample.t_ms - previous));
-        previous = sample.t_ms;
-        let t = sample.t_ms as u32;
-        pointer.motion_absolute(t, sample.pos.x as u32, sample.pos.y as u32, width, height);
-        pointer.frame();
-        // The button goes in a frame of its own, *after* the motion has
-        // been committed. Sent in the same frame as the motion that
-        // first puts the pointer over the window, sway drops it: the
-        // client sees `CursorEntered` and the moves but never a
-        // `MouseInput { state: Pressed }`, so the whole gesture reads as
-        // a hover and nothing scrolls. Found exactly that way, by
-        // printing winit's events.
-        let state = match sample.action {
-            TouchAction::Down => Some(ButtonState::Pressed),
-            TouchAction::Up => Some(ButtonState::Released),
-            TouchAction::Move => None,
-        };
-        if let Some(state) = state {
-            pointer.button(t, BTN_LEFT, state);
-            pointer.frame();
-        }
-        conn.flush()
-            .unwrap_or_else(|e| fail(&format!("flush: {e}")));
-    }
-    pointer.destroy();
-    conn.flush().ok();
-}
-
-fn parse(text: &str, what: &str) -> u32 {
-    text.parse()
-        .unwrap_or_else(|_| fail(&format!("{what} is not a whole number: {text:?}")))
-}
-
-fn fail(message: &str) -> ! {
-    eprintln!("replay-touch: {message}");
-    std::process::exit(1);
-}

scripts/headless.conf

@@ -1,14 +0,0 @@
-# The compositor `scripts/run-headless.sh` starts, so that an example has a
-# surface where there is no display. Nothing here is meant to be looked at
-# directly; `grim` is.
-#
-# No Xwayland: winit talks Wayland natively, so an X server is a second thing
-# to go wrong for no gain.
-xwayland disable
-
-# The default output, overridden per run by `--mode`. Larger than the window
-# an example opens, so nothing is scaled or clipped.
-output HEADLESS-1 mode 1920x1200@60Hz
-
-default_border none
-focus_follows_mouse no

scripts/run-headless.sh

@@ -1,170 +0,0 @@
-#!/bin/sh
-# Run an iris example on a machine with no display.
-#
-#   ./scripts/run-headless.sh tabs
-#   ./scripts/run-headless.sh tabs --shot /tmp/tabs.png --seconds 4
-#   ./scripts/run-headless.sh tabs --replay taps.touch --shot /tmp/tabs.png
-#   ./scripts/run-headless.sh app --dir ../elsewhere --mode 1080x2424@120Hz
-#
-# `--dir DIR` names the workspace to build in, defaulting to this one, so a
-# project that depends on iris can be run through the same rig. `--bin` runs a
-# crate binary rather than an example, and takes its own argv from
-# `$RUN_HEADLESS_ARGS`, word-split on purpose.
-#
-# `--mode` sets the output, for running something at a size other than a
-# desktop's -- a phone's, say. Set every run rather than only when it changes:
-# the compositor is reused between runs, so a default-shaped run after a
-# custom one would otherwise inherit the other's output and quietly screenshot
-# the wrong size.
-#
-# `--replay FILE` drives a `.touch` recording into the window through
-# `replay-touch`, which reads it with the same parser `iris::harness` uses. A
-# recording is `<ms> down|move|up <x> <y>` in the output's own pixels. With
-# `--shot` it also writes `<shot>-before.png` from just before the gesture,
-# since "it moved" is a claim about two pictures.
-#
-# What it supplies is a compositor for winit to open a surface on: a headless
-# sway, and `grim` to screenshot it. Sway gets its own socket and runtime
-# directory rather than joining whatever else is running, because it tiles --
-# adding a window to someone else's compositor resizes theirs.
-set -eu
-
-need() {
-    command -v "$1" >/dev/null 2>&1 || {
-        echo "run-headless: $1 is not installed ($2)" >&2
-        exit 127
-    }
-}
-need sway "the compositor an example opens its window on"
-need swaymsg "sway's control socket"
-
-scripts=$(cd "$(dirname "$0")" && pwd)
-root=$(cd "$scripts/.." && pwd)
-workdir="$root"
-cd "$root"
-run="${XDG_RUNTIME_DIR:-/tmp}/iris-headless"
-seconds=3
-shot=""
-replay=""
-example=""
-kind=example
-mode=1920x1200@60Hz
-
-
-while [ $# -gt 0 ]; do
-    case "$1" in
-        --shot) shot=$2; shift 2 ;;
-        --seconds) seconds=$2; shift 2 ;;
-        --bin) kind=bin; shift ;;
-        --mode) mode=$2; shift 2 ;;
-        --replay) replay=$2; shift 2 ;;
-        --dir) workdir=$(cd "$2" && pwd); shift 2 ;;
-        --) shift; break ;;
-        *) example=$1; shift ;;
-    esac
-done
-[ -n "$example" ] || { echo "usage: $0 NAME [--bin] [--dir DIR] [--mode WxH@Hz] [--replay TOUCH] [--shot PNG] [--seconds N] [-- cargo args]" >&2; exit 2; }
-[ -z "$replay" ] || [ -f "$replay" ] || { echo "run-headless: no touch script at $replay" >&2; exit 2; }
-[ -z "$shot" ] || need grim "the screenshot --shot writes"
-
-mkdir -p "$run"
-export SWAYSOCK="$run/sway.sock"
-
-# Named rather than left to sway's pid-based default, so a second run reuses
-# this compositor instead of starting another beside it.
-if ! swaymsg -t get_version >/dev/null 2>&1; then
-    rm -f "$SWAYSOCK"
-    WLR_BACKENDS=headless WLR_LIBINPUT_NO_DEVICES=1 LIBSEAT_BACKEND=noop \
-        setsid sway -c "$scripts/headless.conf" >"$run/sway.log" 2>&1 &
-    i=0
-    while [ $i -lt 20 ]; do
-        swaymsg -t get_version >/dev/null 2>&1 && break
-        i=$((i + 1)); sleep 0.5
-    done
-    swaymsg -t get_version >/dev/null 2>&1 || {
-        echo "run-headless: compositor did not start; see $run/sway.log" >&2
-        exit 1
-    }
-fi
-
-rm -f "$run/display"
-swaymsg exec -- "sh -c 'printf %s \"\$WAYLAND_DISPLAY\" > $run/display'" >/dev/null
-i=0
-while [ $i -lt 20 ]; do
-    [ -s "$run/display" ] && break
-    i=$((i + 1)); sleep 0.5
-done
-[ -s "$run/display" ] || { echo "run-headless: could not read WAYLAND_DISPLAY" >&2; exit 1; }
-WAYLAND_DISPLAY=$(cat "$run/display")
-export WAYLAND_DISPLAY
-
-echo "run-headless: $WAYLAND_DISPLAY (sway $(swaymsg -t get_version --raw | sed -n 's/.*"human_readable":"\([^"]*\)".*/\1/p'))" >&2
-
-swaymsg output HEADLESS-1 mode "$mode" >/dev/null
-# The extent `replay-touch` positions against, so a script's coordinates
-# are the output's own pixels.
-out_w=${mode%x*}
-out_h=${mode#*x}; out_h=${out_h%@*}
-
-# Built before the app starts, so a compile error is not reported as a
-# window that failed to move.
-[ -z "$replay" ] || (cd "$root" && cargo build --bin replay-touch -p rig-input) >&2
-
-cd "$workdir"
-if [ "$kind" = bin ]; then
-    cargo build --bin "$example" "$@" >&2
-    bin="$workdir/target/debug/$example"
-else
-    cargo build --example "$example" "$@" >&2
-    bin="$workdir/target/debug/examples/$example"
-fi
-
-# Deliberately word-split: this is the binary's own argv, not a single path.
-# shellcheck disable=SC2086
-"$bin" ${RUN_HEADLESS_ARGS:-} >"$run/$example.log" 2>&1 &
-pid=$!
-trap 'kill "$pid" 2>/dev/null || true' EXIT INT TERM
-
-# Wait for the window to be mapped rather than for a number of seconds. A
-# fixed sleep took an all-black screenshot the first time this ran, when sway
-# had started in the same invocation and had not composited its output yet --
-# which is indistinguishable from an app that draws nothing.
-i=0
-while [ $i -lt 40 ]; do
-    kill -0 "$pid" 2>/dev/null || break
-    swaymsg -t get_tree --raw 2>/dev/null | grep -q "\"pid\":$pid," && break
-    i=$((i + 1)); sleep 0.25
-done
-
-i=0
-while [ $i -lt "$((seconds * 2))" ]; do
-    kill -0 "$pid" 2>/dev/null || break
-    i=$((i + 1)); sleep 0.5
-done
-
-if [ -n "$replay" ] && kill -0 "$pid" 2>/dev/null; then
-    if [ -n "$shot" ]; then
-        grim "${shot%.png}-before.png"
-        echo "run-headless: wrote ${shot%.png}-before.png (before the gesture)" >&2
-    fi
-    "$root/target/debug/replay-touch" "$out_w" "$out_h" "$replay"
-    # A fling outlives the finger: the gesture's own last sample is not
-    # when the list stops. Long enough for Android's spline to settle
-    # (`FlingCalculator::duration` tops out around a second and a half).
-    sleep 2
-fi
-
-if kill -0 "$pid" 2>/dev/null; then
-    [ -n "$shot" ] && grim "$shot" && echo "run-headless: wrote $shot" >&2
-    kill "$pid" 2>/dev/null || true
-    wait "$pid" 2>/dev/null || true
-    status=0
-else
-    wait "$pid" 2>/dev/null || status=$?
-    echo "run-headless: $example exited early (status ${status:-0})" >&2
-    status=${status:-1}
-fi
-
-echo "--- $example output ---" >&2
-cat "$run/$example.log" >&2
-exit "$status"

src/harness.rs

@@ -37,81 +37,6 @@ macro_rules! assert_corners {
 }
 pub use crate::assert_corners;
 
-/// One replayed pointer sample, cut down to what a window delivers: where the
-/// pointer is, and whether the button changed.
-#[derive(Clone, Copy, Debug, PartialEq, Eq)]
-pub enum TouchAction {
-    Down,
-    Move,
-    Up,
-}
-
-impl TouchAction {
-    fn parse(word: &str) -> Option<Self> {
-        match word {
-            "down" => Some(Self::Down),
-            "move" => Some(Self::Move),
-            "up" => Some(Self::Up),
-            _ => None,
-        }
-    }
-}
-
-#[derive(Clone, Copy, Debug)]
-pub struct TouchSample {
-    pub t_ms: u64,
-    pub action: TouchAction,
-    pub pos: Vec2,
-}
-
-/// A recorded gesture, in the output's own pixels: `<ms> down|move|up <x> <y>`
-/// a line, `#` to end of line ignored.
-///
-/// One parser for both ways of replaying a recording -- into a harness, and
-/// into a real window -- so the two cannot read the same file differently.
-pub struct TouchScript {
-    pub samples: Vec<TouchSample>,
-}
-
-impl TouchScript {
-    pub fn parse(text: &str) -> Result<Self, String> {
-        let mut samples: Vec<TouchSample> = Vec::new();
-        for (i, line) in text.lines().enumerate() {
-            let line = line.split('#').next().unwrap_or("").trim();
-            if line.is_empty() {
-                continue;
-            }
-            let at = |what: &str| format!("touch script line {}: {what}: {line:?}", i + 1);
-            let mut words = line.split_whitespace();
-            let (Some(t), Some(action), Some(x), Some(y), None) = (
-                words.next(),
-                words.next(),
-                words.next(),
-                words.next(),
-                words.next(),
-            ) else {
-                return Err(at("expected `t_ms action x y`"));
-            };
-            let t_ms: u64 = t.parse().map_err(|_| at("t_ms is not a whole number"))?;
-            let action =
-                TouchAction::parse(action).ok_or_else(|| at("action is not down/move/up"))?;
-            let x: f32 = x.parse().map_err(|_| at("x is not a number"))?;
-            let y: f32 = y.parse().map_err(|_| at("y is not a number"))?;
-            if let Some(last) = samples.last()
-                && t_ms < last.t_ms
-            {
-                return Err(at("samples must be in time order"));
-            }
-            samples.push(TouchSample {
-                t_ms,
-                action,
-                pos: Vec2::new(x, y),
-            });
-        }
-        Ok(Self { samples })
-    }
-}
-
 #[derive(Default)]
 pub struct HarnessState {
     pub root: Option<StrongWidget>,
@@ -235,23 +160,6 @@ impl Harness {
         self.release(CursorButton::Left);
     }
 
-    /// Drives a recorded gesture through the harness.
-    pub fn replay(&mut self, script: &TouchScript) {
-        for sample in &script.samples {
-            match sample.action {
-                TouchAction::Down => {
-                    self.move_to(sample.pos);
-                    self.press(CursorButton::Left);
-                }
-                TouchAction::Move => self.move_to(sample.pos),
-                TouchAction::Up => {
-                    self.move_to(sample.pos);
-                    self.release(CursorButton::Left);
-                }
-            }
-        }
-    }
-
     fn button(&mut self, button: CursorButton) -> &mut ActivationState {
         let buttons = &mut self.cursor.buttons;
         match button {
@@ -270,51 +178,3 @@ impl Harness {
         self.cursor.end_frame();
     }
 }
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    fn parse(text: &str) -> Result<Vec<(u64, TouchAction, f32, f32)>, String> {
-        Ok(TouchScript::parse(text)?
-            .samples
-            .iter()
-            .map(|s| (s.t_ms, s.action, s.pos.x, s.pos.y))
-            .collect())
-    }
-
-    #[test]
-    fn a_recording_is_time_action_and_a_point() {
-        assert_eq!(
-            parse("0 down 10 20\n16 move 10.5 24\n32 up 10.5 24").unwrap(),
-            [
-                (0, TouchAction::Down, 10.0, 20.0),
-                (16, TouchAction::Move, 10.5, 24.0),
-                (32, TouchAction::Up, 10.5, 24.0),
-            ]
-        );
-    }
-
-    #[test]
-    fn blank_lines_and_comments_are_not_samples() {
-        assert_eq!(
-            parse("# a flick\n\n 0 down 1 2   # the finger lands\n\n").unwrap(),
-            [(0, TouchAction::Down, 1.0, 2.0)]
-        );
-    }
-
-    #[test]
-    fn a_recording_that_goes_backwards_is_rejected() {
-        // Replay waits out the gap between samples, so time running backwards
-        // would silently become no wait at all.
-        let err = parse("16 down 1 2\n0 up 1 2").unwrap_err();
-        assert!(err.contains("time order"), "{err}");
-    }
-
-    #[test]
-    fn a_line_that_is_not_a_sample_says_which_line() {
-        let err = parse("0 down 1 2\n16 wiggle 1 2").unwrap_err();
-        assert!(err.contains("line 2"), "{err}");
-        assert!(err.contains("down/move/up"), "{err}");
-    }
-}

tests/draw_cost.rs

@@ -22,8 +22,8 @@ use std::time::Instant;
 
 use iris::prelude::*;
 use iris_core::{
-    GlyphPrimitive, MaskIdx, MoveIdx, PrimitiveInst, RectPrimitive, TextureHandle,
-    TexturePrimitive, UiData, UiRegion, UiRenderNode, UiRenderState,
+    GlyphPrimitive, MaskIdx, PrimitiveInst, RectPrimitive, TextureHandle, TexturePrimitive, UiData,
+    UiRegion, UiRenderNode, UiRenderState,
 };
 use wgpu::{Color as GpuColor, *};
 
@@ -95,7 +95,6 @@ fn fill(
                     primitive: RectPrimitive::color(UiColor::WHITE),
                     region: UiRegion::FULL,
                     mask_idx: MaskIdx::NONE,
-                    move_idx: MoveIdx::NONE,
                 },
             );
             render.layers.write(
@@ -112,7 +111,6 @@ fn fill(
                     },
                     region: UiRegion::FULL,
                     mask_idx: MaskIdx::NONE,
-                    move_idx: MoveIdx::NONE,
                 },
             );
         }
@@ -125,7 +123,6 @@ fn fill(
                     primitive: TexturePrimitive::from(h),
                     region: UiRegion::FULL,
                     mask_idx: MaskIdx::NONE,
-                    move_idx: MoveIdx::NONE,
                 },
             );
         }

tests/layout.rs

@@ -109,20 +109,3 @@ fn a_fixed_box_is_drawn_again_rather_than_stretched() {
 
     assert_corners!(h, panel, (0, 0), (400, 250));
 }
-
-#[test]
-fn a_moved_subtree_takes_its_children_with_it() {
-    let mut h = Harness::new((400, 400));
-    let first = rect(Color::RED).height(40).add(&mut h.rsc);
-    let inner = rect(Color::BLUE).add(&mut h.rsc);
-    let row = inner.pad(10).height(40).add(&mut h.rsc);
-    h.set_root((first, row).span(Dir::DOWN));
-    assert_corners!(h, inner, (10, 50), (390, 70));
-
-    h.rsc[first].y = Some(Len::abs(80));
-    h.frame();
-
-    // The row is the same shape somewhere else, so one slot moved it and
-    // `inner`'s own region was never rewritten.
-    assert_corners!(h, inner, (10, 90), (390, 110));
-}

tests/pointer.rs

@@ -2,7 +2,7 @@
 
 use std::{cell::RefCell, rc::Rc};
 
-use iris::harness::{Harness, TouchScript};
+use iris::harness::Harness;
 use iris::prelude::*;
 
 #[test]
@@ -58,28 +58,3 @@ fn hover_ends_when_the_cursor_leaves_the_window() {
     h.leave();
     assert_eq!((*hovered.borrow(), *ended.borrow()), (1, 1));
 }
-
-#[test]
-fn a_recorded_gesture_presses_where_it_says() {
-    let mut h = Harness::new((400, 200));
-    let clicks = Rc::new(RefCell::new(Vec::new()));
-
-    let (on_left, on_right) = (clicks.clone(), clicks.clone());
-    let left = rect(Color::RED)
-        .width(100)
-        .on(CursorSense::click(), move |_, _| {
-            on_left.borrow_mut().push("left")
-        })
-        .add(&mut h.rsc);
-    let right = rect(Color::BLUE)
-        .on(CursorSense::click(), move |_, _| {
-            on_right.borrow_mut().push("right")
-        })
-        .add(&mut h.rsc);
-    h.set_root((left, right).span(Dir::RIGHT));
-
-    let script = TouchScript::parse("0 down 300 100\n80 up 300 100").unwrap();
-    h.replay(&script);
-
-    assert_eq!(*clicks.borrow(), ["right"]);
-}