irisandClaude Fable 5.1
e12c708246
Iris asked (2026-09-06) that dragging be part of iris's default input system rather than duplicated per app: "anything that provides good performance and can be generalized well is part of iris rather than the app." DragArbiter and VelocityTracker (both already in iris::sense) are now bundled into a new DragGesture, which also takes exclusive pointer capture (UiRenderState::capture_pointer/release_pointer/captured_pointer) the moment a gesture commits to panning or selecting, and delivers a new CursorSense::Drop -- not PressEnd -- to the captured widget when the button lifts, wherever on screen that happens to be. This directly targets the phone bench's "finger flings do nothing": per-widget hit testing silently drops a gesture the instant the pointer moves off every registered region, which a fast pan/fling does routinely (crossing several virtualised rows, or ending off the loaded content entirely) -- so PressEnd, and the velocity/fling-start decision hanging off it, was frequently never delivered at all. Capture targets List's own stable id (List::key_at resolves the row-under-pointer from its extents), not a row's, since List retires rows mid-drag as content scrolls. transcript-ui::Selection::drag now only decides pan-vs-select from DragGesture's outcome; row.rs's per-row registration is only ever a gesture's first frame, with lib.rs registering the List-level continuation once. New tests: sense_tests.rs's two pointer-capture regressions, list.rs's replacing_the_last_row_many_times_does_not_leak_primitives (a P0 stale-primitives diagnostic -- passes, pinning the widget-arena layer as not the leak). MainActivity.java opts into edge-to-edge (Window::setDecorFitsSystemWindows(false), API 30+, no new dependency) so window insets are redelivered on every change including a pure IME toggle -- the named-but-untried fix for the phone bench's "keyboard: could not be shown" and the emulator's identical non-confirmation. cargo fmt/clippy/test clean across the iris workspace. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>