Implement IME composition support and migrate regular character input to
a hidden textarea, matching the xterm.js approach.
Key changes:
- Add a hidden, absolutely-positioned `<textarea>` inside `.terminal-screen`
that follows the terminal cursor cell. It receives focus on click, connect,
and resize so the OS/browser IME candidate window appears at the cursor.
- `on:input` now sends regular printable characters; `on:keydown` only handles
special keys (arrows, Enter, Esc, Backspace, F-keys, Ctrl combos).
- `on:compositionstart/end` track IME sessions and send the final composed
string at the end, avoiding partial pinyin/jamo/kana leaks.
- Move `on:paste` and `on:keydown` from `.terminal-screen` to the textarea so
focus stays on the IME target.
- Replace `.terminal-screen:focus` with `:focus-within` since the screen div
no longer holds focus.
- Add `is_regular_text_input` helper and unit test.
Web-sys features extended with `InputEvent` and `CompositionEvent`.
Tests: 24/24 pass, clippy clean.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Drag to select terminal text and copy it with Ctrl-Shift-C. Built as a
custom selection model (xterm.js-style) rather than native selection,
because the virtual scroll only keeps ~60 rows in the DOM and rebuilds
them every frame — native selection would be destroyed and couldn't span
scrolled-out rows.
core.rs:
- selection_text(start, end) extracts a (row,col)→(row,col) range straight
from history_rows + screen_cache, so copy is correct across the whole
buffer regardless of what is currently rendered
- TerminalRow::text_in_cols slices a row by grid columns (using the
segment `cols` widths), trimming trailing whitespace
component.rs:
- Selection { anchor, head } in logical buffer coords; mousedown/move/up
drag updates it; point_to_cell maps pixels→cell (padding + scrollTop)
- selection_rects computes per-row highlight rects clipped to the rendered
window; rendered as an overlay inside the translated rows layer so the
highlight follows scrolling without splitting text segments
- cell_size signal kept in sync with viewport measurement
- Ctrl-Shift-C copies via navigator.clipboard.write_text; Ctrl-C is left
untouched (still SIGINT); typing clears the selection
style: .terminal-selection overlay, user-select:none on the grid, rows
above the highlight via z-index.
web-sys: add DomRect, MouseEvent, Navigator, Clipboard.
Adds point_to_cell / selection_rects / selection_text unit tests (16
terminal tests total). Marks P0 done in TERMINAL_ROADMAP.md.
Known follow-up: no auto-scroll when dragging past the viewport edge
(scroll first, then select); wide+combining column slicing is approximate.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Pasting (Ctrl-V or browser menu) now sends clipboard text to the PTY.
- on:paste reads clipboard_data().get_data("text"); newlines normalized
to CR (the line-submit byte) via the pure, unit-tested prepare_paste()
- when the app enabled bracketed paste (DECSET 2004, exposed via the new
TerminalCore::bracketed_paste() proxy), the text is wrapped in
ESC[200~ / ESC[201~ so vim et al. don't auto-indent each pasted line
- pasting returns the view to live mode + scrolls to bottom, matching the
keydown handler
- Cargo.toml: add ClipboardEvent/DataTransfer (and explicit WheelEvent)
to the web-sys feature allowlist
- right-click is left to the browser's default menu (avoids requiring
clipboard-read permission); Ctrl-V is the primary path
Adds a prepare_paste unit test (14 terminal tests total) and marks paste
done in TERMINAL_ROADMAP.md. Also fixes a clippy manual_contains lint in
an existing test.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
