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Aamer Akhter
82b090c74a
Android/GBoard-style keyboards fire keydown with keyCode 229 and, on some paths, never mutate xterm's helper textarea. xterm has nothing to diff, so it emits no data and the typed character is silently dropped: it never reaches the PTY and never appears on screen. terminal-keycode229-recovery.js is a standalone controller that re-emits exactly those keys, and only once. xterm stays authoritative throughout: - Only an explicit keyCode 229 keydown carrying a single printable key (or Enter) is eligible; Process/Unidentified/Dead, modifiers, AltGraph and a live composition are all left alone. - The re-emit is scheduled from a microtask and then a zero-delay timer, so xterm's own textarea diff always gets the first opportunity; canonical data for the same key cancels the pending fallback. - compositionstart and blur drop every pending candidate, so a real IME composition lifecycle is never second-guessed. - After a recovery, one late canonical value attributed to that key token (via beforeinput/input on the helper textarea) is suppressed so the character cannot be delivered twice; the record expires after 250ms and an unattributed byte is never suppressed. terminal-ui.js wires it at the two existing choke points — the custom key handler and the onData registration, the latter now a named handler so the recovery path can re-enter it — with both hooks wrapped so a failure in the fallback can never break canonical input. Unit coverage drives the module directly in a vm; the wiring itself is covered end-to-end in the (browser-only) terminal-copy-shortcut suite.