Builds out host-drawn text selection for embedded napplet/nsite/browser
surfaces toward native parity, and fixes the bugs found while exercising it.
- Magnifier loupe (#4): EmbeddedMagnifier + provider-side pixel capture
(EmbeddedMagnifierProbe) shipped over IPC for both embed paths; the
caret/selection handles drive it via OnMagnify.
- SelectionUiState: single source of truth for the overlay show/hide rules
(insertion caret / in-field range / page-text range + dragging/scrolling).
- EmbeddedSelectionDrag: suspends the nav drawer's edge swipe while a handle
is dragged (auto-scroll #9).
Bug fixes:
- No more overlay blink on word-select: the shim's selection-reveal scrolls
(a textarea auto-scrolling to show a forming/re-asserted range) no longer
trip the hide-on-scroll path, and the hide self-heals instead of being
re-armed indefinitely.
- RemoteImeView debounces the range-lost signal so a transient collapse that
gets re-asserted doesn't flicker the handles/toolbar.
- Focusing a field clears any page-text selection (shim + host), so the stale
page handles/Copy bar no longer linger above — and stop stealing drags from —
the field overlays; also cancels any in-flight scroll-hide on focus.
- Caret insertion-handle drag now actually moves the caret: read the pointer
delta with positionChangeIgnoreConsumed() before consuming, so the value
isn't zeroed by our own consume (or the sandbox surface consuming the move).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
tools/ime-test/index.html is a single-page input+textarea harness with an
on-page log timestamping focus/selection/input/composition events, paint
latency, long-tasks, and main-thread blocks — the instrumentation used to pin
the erase / caret-jump / first-letter-freeze bugs and what we'll use to profile
the magnifier. README documents serving it (python http.server on 8765,
10.0.2.2 for emulator / adb reverse for USB) and opening it as an embedded tab
via the in-app browser address bar. Plan gets a matching "How to test" section.
Dev tool only — nothing under tools/ ships, so the [ImeDiag] strings stay out of src/.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Vitor PamplonaandClaude Opus 4.8