Implement the Android-native touch selection model, verified on-device:
- long-press selects the word under the finger (blank -> caret + paste-only
menu); double-tap selects the word; drag handles resize the selection,
drag the highlighted body to move it; floating menu offers copy/cut/paste
(selection) or paste (bare caret), closing on any item tap.
- Renderer reports finger positions (app-local Dp) as tap/double-tap/
long-press/selection-drag events; the logic goroutine owns all geometry
(EditorRegion, menu rect, hit-testing, handles) and the renderer only
draws the frame snapshot.
- Long press: 400 ms still-press on the editor, cancelled by movement
(non-grabbing raw pointer probe) or by a scroll/handle grab. The main
loop keeps invalidating while a press is pending (Gio renders on demand;
a stationary finger produces no frames).
- Clipboard crosses the goroutine boundary via buffered channels
(clipboardSetChan/pasteReqChan logic->main, pasteChan main->logic);
main executes the Gio ops and, on Android, invalidates after ReadCmd
because a queued transfer.DataEvent schedules no frame of its own.
Renderer fixes found while validating on-device:
- clickReg was stored by value in a map; range yielded copies so per-frame
press bookkeeping (long-press state) was silently discarded. Now pointers.
- On Android a tap's press+release arrive in the same frame and
gesture.Click/Drag return one event per Update call; without draining
each gesture's queue every frame the release was lost on an idle window
and every menu tap was swallowed (needed a second tap to 'rescue' it).
Click and drag loops now drain to exhaustion (scroll already does).
- pointer.Filter queries must name Kinds: a zero-kinds filter matches
nothing (the press-probe query was dead).
- Menu.Draw offsets items by the menu origin; the clippable drawElement
branch registers SelDrag (handles now draw for the TextField).
Tests: internal/editor/touch_selection_test.go (word range, long-press,
double-tap, tap/menu guards, handle drags, menu actions, selection edits)
and internal/test/e2e/touch_selection_e2e_test.go; full suite green under
-race. Docs: spec.md §2.2 + §7, architecture.md §6.3a, development_plan.md
Phases 8-9.
Greg Pomerantz
2a16c0017c