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fix(mobile): restore tap-to-position cursor after master merge — hand-encode SGR when server strips mouse DECSETs

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v1.1.7 (3172bef, arrived via the master merge) strips mouse-tracking DECSET
sequences from claude/codex/gemini output so the wheel keeps scrolling
scrollback. Side effect: the browser xterm's mouseTrackingMode is permanently
'none' for those sessions, and the mobile touchend tap branch gates its
synthetic click on exactly that mode — so tap-to-position-cursor silently died.

Fix: when tracking reads 'none' but the session mode is one the server strips
(claude/codex/gemini — the PTY-side TUI still has tracking ON), encode the SGR
press+release report directly from the touch point and send it to the PTY,
bypassing xterm's mouse encoder. No DOM click is dispatched, so xterm's local
selection cannot trigger either.

Tests: 3 new cases in test/terminal-touch-tap.test.ts (SGR encoding, grid
clamping, shell-mode exclusion); verified E2E via Playwright iPhone emulation
against both a stripped-stream instance and the production bundle.
This commit is contained in:
Teigen
2026-07-07 17:52:32 +08:00
parent 1fa88cd187
commit 9535edc367
2 changed files with 83 additions and 0 deletions
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src/web/public/terminal-ui.js
+33
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@@ -452,6 +452,15 @@ Object.assign(CodemanApp.prototype, {
}
if (touch && mouseTrackingOn) {
this._dispatchSyntheticTerminalClick(touch.clientX, touch.clientY);
} else if (touch && this._sessionUsesServerMouseStrip()) {
// The server strips mouse-tracking DECSETs from claude/codex/gemini
// output (isAltScreenStripMode, session.ts) so the wheel keeps
// scrolling scrollback — which leaves THIS xterm permanently at
// mouseTrackingMode 'none' even though the TUI on the PTY side has
// tracking ON and still understands SGR reports. Encode the report
// ourselves and send it straight to the PTY: no DOM click is
// dispatched, so xterm's local selection can't trigger either.
this._sendSyntheticSgrTap(touch.clientX, touch.clientY);
}
this._syncMobileHelperTextareaToCursor();
// Route subsequent typing to the right place: keep the CJK input
@@ -2073,6 +2082,30 @@ Object.assign(CodemanApp.prototype, {
}
},
// Mirror of the server's isAltScreenStripMode (session.ts): session modes whose
// output stream has mouse-tracking DECSET sequences stripped before reaching the
// browser. For these, xterm's live mouseTrackingMode is useless as a gate — the
// PTY-side TUI keeps tracking enabled, we just never see the enable sequence.
_sessionUsesServerMouseStrip() {
const mode = this.sessions?.get(this.activeSessionId)?.mode || 'claude';
return mode === 'claude' || mode === 'codex' || mode === 'gemini';
},
// Encode a tap as an SGR mouse report (press + release at button 0) and send it
// to the PTY directly, bypassing xterm's mouse encoder. Column/row are derived
// from the touch point the same way xterm maps a click: offset inside
// .xterm-screen divided by the rendered cell size, 1-based, clamped to the grid.
_sendSyntheticSgrTap(clientX, clientY) {
if (!this.activeSessionId || !this.terminal || !Number.isFinite(clientX) || !Number.isFinite(clientY)) return;
const screen = this.terminal.element?.querySelector('.xterm-screen');
const cell = this.terminal._core?._renderService?.dimensions?.css?.cell;
if (!screen || !cell?.width || !cell?.height) return;
const rect = screen.getBoundingClientRect();
const col = Math.max(1, Math.min(this.terminal.cols, Math.floor((clientX - rect.left) / cell.width) + 1));
const row = Math.max(1, Math.min(this.terminal.rows, Math.floor((clientY - rect.top) / cell.height) + 1));
this._sendInputAsync(this.activeSessionId, `\x1b[<0;${col};${row}M\x1b[<0;${col};${row}m`);
},
_installMobileTapMouseGuard() {
const el = this.terminal?.element;
if (!el || el._codemanTapMouseGuardInstalled) return;