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Fix Option dead-key composition in terminal - #12997
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📝 WalkthroughWalkthroughKeyboardLayout detects Option dead keys and selects the event passed to AppKit according to the ChangesOption dead-key composition
Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Bug fix · Severity of issue fixed: Medium Sequence Diagram(s)sequenceDiagram
participant User
participant GhosttyTerminalView
participant KeyboardLayout
participant AppKit
User->>GhosttyTerminalView: press Option-modified dead key
GhosttyTerminalView->>KeyboardLayout: select text input event
KeyboardLayout-->>GhosttyTerminalView: original or translated event
GhosttyTerminalView->>AppKit: interpret selected event
AppKit-->>GhosttyTerminalView: interpreted text input
Merge Risk: 🔵 Low · up to Dead-key behavior is not shown to be broken, but the new regression test can fail on non-U.S. keyboard layouts. Make the test independent of the host layout before relying on it across machines. Security Architecture ReviewSecurity architecture risk: 🔵 Low · up to The terminal’s existing input-handling safeguards remain in place, and no security issue has been established. There is limited uncertainty about composition already in progress when keyboard settings change. Retained concerns Security review detailsSecurity Blast Radius
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Mac fleet instructions for head JOB_JSON=$(~/.local/bin/cmux-ci submit --kind cmux --command 'CMUX_FLEET_BUILD_TAG=pr-12997-456ba2a9 /Users/Shared/cmux-build-fleet/recipes/cmux.sh https://github.com/manaflow-ai/cmux.git 456ba2a9e5deb3b7b78dbaed94cd956ac962a7a7' --artifact artifacts/cmux.app.zip --workspace https://github.com/manaflow-ai/cmux/pull/12997 --source-digest 456ba2a9e5deb3b7b78dbaed94cd956ac962a7a7 --cache-key cmux:pr-12997 --min-free-bytes 268435456000 --label cmux --label ram48)
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~/.local/bin/cmux-ci wait "$JOB_ID" --receipt artifacts/fleet/$JOB_ID.json
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Reviewed, and I think this needs one change before it lands.
The root cause of #12947 looks like Ghostty's The conflict with main is only |
…d-key # Conflicts: # cmuxTests/CJKIMEInputTests.swift
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@teamleaderleo Addressed in
The production change is in |
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Actionable comments posted: 1
- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
In `@cmuxTests/CJKIMEInputTests.swift`:
- Around line 2186-2192: Make
testOptionDeadKeyPreservesAppKitCompositionWhenOptionAsAltIsUnset independent of
the active keyboard layout: provide a test-owned input source for
KeyboardLayout.isDeadKey and pin AppKit to that same layout, or consume events
in the hook and assert only the event passed to interpretKeyEvents instead of
host-dependent composition output.
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📒 Files selected for processing (5)
Sources/GhosttyTerminalView.swiftSources/KeyboardLayout.swiftcmux.xcodeproj/project.pbxprojcmuxTests/CJKIMEInputTests+DeadKeyComposition.swiftcmuxTests/CJKIMEInputTests.swift
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85a3655 ci: seed j14 DerivedData on a trusted-only owned mini (manaflow-ai#14380) dfb9466 Merge pull request manaflow-ai#14337 from manaflow-ai/14327-team-picker-cloud e805dc8 Merge pull request manaflow-ai#12997 from manaflow-ai/task-12947-option-dead-key 8c7670d ci: stop compile admission before compiling when the fast Linux gate declined (manaflow-ai#14374) 460bda4 test: build cmuxTests without a Swift module in scripts/test-unit.sh (manaflow-ai#14378) 206c6fb ci: keep an owned Mac warm through cancelled and failed admissions (manaflow-ai#14375) b5798b5 test: isolate auto dead-key config coverage 753d4d4 Merge remote-tracking branch 'origin/main' into 14327-team-picker-cloud 1f09959 ci: route owned-mini root jobs to the root runner label (manaflow-ai#14357) 127d9d3 Remove filled background from Cloud team picker ada4519 ci: build cmuxTests without emitting its Swift module (manaflow-ai#14364) 9c2cd6f Merge remote-tracking branch 'origin/main' into 14327-team-picker-cloud 687e0a4 fix: import terminal test dependencies 244f588 ci: report which cmuxTests suites an app-source change can reach (report only) (manaflow-ai#14367) cbfa373 ci(canary): send each Cloud VM canary run to Axiom (manaflow-ai#14368) b5a50a9 test: wait for async reload, selectionchange, and pane width in three main-red app-host tests (manaflow-ai#14366) 2adda75 Merge remote-tracking branch 'origin/main' into 14327-team-picker-cloud 40b2bec fix: respect explicit Option-as-Alt for dead keys 7b42ac7 test: cover explicit and auto Option dead-key routing d2d64ee Merge origin/main and preserve both test references 106ecef Merge remote-tracking branch 'origin/main' into task-12947-option-dead-key a632acb Merge remote-tracking branch 'origin/main' into 14327-team-picker-cloud 5579c08 test: isolate team picker shortcut preference 9d5b356 Merge remote-tracking branch 'origin/main' into 14327-team-picker-cloud 6099585 Merge remote-tracking branch 'origin/main' into 14327-team-picker-cloud e761153 test: force typed Cloud flag overrides in UI fixture dcd3d05 Merge remote-tracking branch 'origin/main' into 14327-team-picker-cloud 36688f3 test: exercise team picker in the visible account footer 73e30f1 Merge remote-tracking branch 'origin/main' into 14327-team-picker-cloud 6c8f1f8 fix: move team scope into the Cloud header 6ddba81 test: cover Cloud team picker placement for manaflow-ai#14327 456ba2a fix: preserve Option dead-key composition # Conflicts: # .github/workflows/ci-guards.yml # .github/workflows/ci-macos.yml # .github/workflows/ci.yml # .github/workflows/cloud-vm-canary.yml # .github/workflows/seed-derived-data.yml
3 participants
Fixes #12947.
Option dead-key events (for example Option+E on a US layout) must reach AppKit with the original Option modifier so the system can enter and complete dead-key composition. The terminal still uses Ghostty's translated event for ordinary Option-as-Alt input. Added regression coverage to ensure dead-key events preserve Option and are not emitted as translated terminal text.
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@codesmith-botwith what you need. Autofix is disabled.Summary by cubic
Fixes Option dead-key composition in the terminal so AppKit receives dead-key events (like Option+E on a US layout) with the original Option modifier and can complete the composition. Previously Ghostty's translated event replaced these events, so the composition never started and the following key was swallowed.
macos-option-as-altsetting still claims those keys for Ghostty, preserving readline/Emacs Meta chords.macos-option-as-altand auto-detection (unset) paths. Fixes Regression (#12343, v0.64.23+): Option dead-key accent composition silently swallowed, not sent to terminal #12947.Written for commit b5798b5. Summary will update on new commits.
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