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fix(web): make message link context menus usable with screen readers - #10391

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akj wants to merge 13 commits into
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akj:fix/desktop-link-menu-focus

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@akj

@akj akj commented Sep 6, 2026 •

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Opening a message link's context menu can leave NVDA outside its options on Windows.

Use T3's existing in-page menu component for message links. Focus starts on the first option and returns to the link on Escape or Shift+Tab. Tab closes the menu and moves on to the next control after the link. Links keep their normal announcements.

Fixes #10390.

Tested repeated openings with NVDA in the isolated desktop app. Automated checks covered initial focus, arrow navigation, Escape, and copying both link types. A mounted-menu test covers Tab, Shift+Tab, and Escape. The 65 focused tests and web typecheck passed.

message-link-menu.mp4

Before and after

Windows desktop app (Electron 44.4.2), right-clicking the same link in a test thread. Before is main at 31a9da1. After is this branch at 5fa20fe, which is that main plus this PR's three web files.

Before: Windows' native menu opens with no item selected. After: T3's in-page menu opens with its first item focused.

Full windows

Before: the whole app window on main, with the native menu open at the link

After: the whole app window on this branch, with the in-page menu open at the link and its first item focused

Built with GPT-6 in Codex. The Tab fix is from Claude Opus 5.5 in Claude Code.

Note

Keep message link menu focus in the page for MarkdownFileLink and MarkdownAnchor

  • Adds useMessageLinkMenu hook in useMessageLinkMenu.tsx that renders an in-tree menu at the pointer position, returns the selected item asynchronously, and restores focus to the triggering link element when the menu closes
  • Updates MarkdownFileLink in ChatMarkdown.tsx to use the hook instead of the local API context-menu service, passing the triggering link or button element for focus restoration
  • Updates MarkdownAnchor to use the hook for external-link context menus, including links rendered with pull-request previews, so the originating anchor is the final focus target
  • Behavioral Change: file-link and external-link context menus now render as in-tree popups rather than via the API context-menu service; focus moves to the first menu item on open and back to the trigger link on close

Macroscope summarized da4ce6f.

Summary by CodeRabbit

  • New Features

    • Added consistent context menus for file links, pull-request preview links, and external links in chat messages.
    • Link menus open relative to the selected link and support item selection with improved focus handling.
  • Bug Fixes

    • Improved menu cleanup and handling when multiple menu requests occur.
    • Corrected menu positioning when links are activated without pointer coordinates by anchoring menus to the triggering link.

@github-actions github-actions Bot added vouch:unvouched PR author is not yet trusted in the VOUCHED list. size:M 30-99 changed lines (additions + deletions). labels Sep 6, 2026
@akj akj changed the title fix(desktop): focus message link menus opened with the keyboard fix(web): keep message link menu focus in the page Sep 6, 2026
@akj
akj marked this pull request as ready for review September 6, 2026 18:28
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@github-actions github-actions Bot added size:L 100-499 changed lines (additions + deletions). and removed size:M 30-99 changed lines (additions + deletions). labels Sep 6, 2026
@macroscopeapp

macroscopeapp Bot commented Sep 6, 2026

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Approvability

Verdict: Would Approve

Macroscope's review found this PR approvable — This is a contained accessibility bug fix that keeps existing message-link menu actions while moving focus into an in-page menu and restoring it to the originating link. The implementation is localized to ChatMarkdown and a small reusable hook, without schema, configuration, deployment, or other sensitive changes.

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@akj akj changed the title fix(web): keep message link menu focus in the page fix(web): make message link context menus usable with screen readers Sep 6, 2026
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coderabbitai Bot commented Sep 11, 2026 •

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📝 Walkthrough

Walkthrough

Message link context menus now use a shared in-page menu hook. File links and markdown anchors pass their triggers to the hook and render the menu with the link content. The hook manages positioning, focus restoration, selections, and cleanup.

Changes

Message link context menus

Layer / File(s) Summary
Shared link menu lifecycle
apps/web/src/components/chat/useMessageLinkMenu.tsx, apps/web/src/components/chat/useMessageLinkMenu.test.tsx
The hook manages menu positioning, selections, focus, empty menus, pending requests, and unmount cleanup. Tests verify pointer coordinates and trigger-based positioning.
File and markdown link integration
apps/web/src/components/ChatMarkdown.tsx
File links and markdown anchors use the shared hook, pass their triggers, and render the menu with link content. Pull-request previews and external links use the same menu path.

Priority: ➖ Normal

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Bug fix · Severity of issue fixed: Medium

Suggested reviewers: juliusmarminge

Sequence Diagram(s)

sequenceDiagram
  participant MessageLink
  participant useMessageLinkMenu
  participant InPageMenu
  MessageLink->>useMessageLinkMenu: Open link menu with trigger
  useMessageLinkMenu->>InPageMenu: Render positioned menu
  InPageMenu-->>useMessageLinkMenu: Return selection or dismissal
  useMessageLinkMenu-->>MessageLink: Restore focus to trigger
Loading

Merge Risk: ⚪ Minimal · up to 22b07

Keyboard-opened link menus now anchor to their triggering link rather than the viewport origin, so no actionable merge risk remains.

🚥 Pre-merge checks | ✅ 5
✅ Passed checks (5 passed)
Check name Status Explanation
Title check ✅ Passed The title clearly and concisely describes the main change: improving message link context menus for screen-reader users.
Description check ✅ Passed The description explains what changed, why it changed, the accessibility behavior, testing performed, issue reference, and UI changes with visual evidence. It does not include the template's Checklist…
Linked Issues check ✅ Passed Issue #10390 requires the existing in-page ARIA menu for message external and file links, with reliable focus behavior and no installed-app or NVDA configuration changes. The PR routes both link types…
Out of Scope Changes check ✅ Passed The reviewed changes are limited to message-link menu integration, shared menu focus and positioning behavior, and tests for that behavior. These changes directly support Issue #10390. No unrelated pr…
Docstring Coverage ✅ Passed No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 1…
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Actionable comments posted: 1

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Inline comments:
In `@apps/web/src/components/ChatMarkdown.tsx`:
- Line 2891: Update the external-link context-menu flow around
showExternalLinkContextMenu and useMessageLinkMenu so a keyboard event position
of (0, 0) is replaced with the trigger element’s bounds before opening the
popup; preserve pointer coordinates and add a regression test covering the
keyboard case.

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📒 Files selected for processing (2)
  • apps/web/src/components/ChatMarkdown.tsx
  • apps/web/src/components/chat/useMessageLinkMenu.tsx

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Comment thread apps/web/src/components/ChatMarkdown.tsx
@cursor

cursor Bot commented Sep 11, 2026

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@akj

akj commented Sep 11, 2026

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@coderabbitai The positioning warning in the summary is stale. Commit 75c7277 moved the zero-coordinate fallback into useMessageLinkMenu, which both external links and file links call. The regression test failed before that change and now verifies the trigger's lower-left corner instead of the viewport origin. The current head includes that fix. Please update the summary to reflect the resolved finding.

I'm leaving the docstring-coverage warning unchanged. The hook already documents its accessibility constraint; the newly added TestLinkMenu component only mounts that hook for its positioning tests. A docstring to meet a percentage target would repeat the test code, contrary to AGENTS.md's guidance.

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coderabbitai Bot commented Sep 11, 2026 •

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🧩 Analysis chain

🏁 Script executed:

#!/bin/bash
set -euo pipefail

printf '%s\n' '--- current head and referenced commit ---'
git rev-parse HEAD
git show --no-patch --format='%H%n%s' 75c727756

printf '%s\n' '--- applicable AGENTS.md files ---'
fd -HI '^AGENTS\.md$' . -E .git -x sh -c 'echo "--- $1"; cat "$1"' sh {} \;

printf '%s\n' '--- hook structure ---'
ast-grep outline apps/web/src/components/chat/useMessageLinkMenu.tsx --view expanded

printf '%s\n' '--- hook fallback and anchor logic ---'
rg -n -C 8 'clientX|clientY|getBoundingClientRect|position|anchor' \
  apps/web/src/components/chat/useMessageLinkMenu.tsx

printf '%s\n' '--- hook callers ---'
rg -n -C 5 '\buseMessageLinkMenu\s*\(' \
  apps/web/src/components/ChatMarkdown.tsx \
  apps/web/src/components/chat/useMessageLinkMenu.test.tsx

printf '%s\n' '--- positioning test ---'
ast-grep outline apps/web/src/components/chat/useMessageLinkMenu.test.tsx --view expanded
rg -n -C 10 'lower|left|bottom|clientX|clientY|getBoundingClientRect|origin|position' \
  apps/web/src/components/chat/useMessageLinkMenu.test.tsx

Length of output: 145008


@akj I verified the current head.

useMessageLinkMenu now applies the zero-coordinate fallback for both link types. When both coordinates are zero, it anchors the menu at the triggering link’s lower-left corner. The regression test verifies this behavior and preserves valid positions where only one coordinate is zero.

The docstring-coverage warning remains unchanged. TestLinkMenu only mounts the hook for the positioning test. An additional docstring would repeat information that the test code already provides and would not follow the AGENTS.md documentation guidance.


✏️ Learnings added
Learnt from: akj
URL: https://github.com/pingdotgg/t3code/pull/10391

Timestamp: 2026-09-11T23:25:43.362Z
Learning: In `apps/web/src/components/chat/useMessageLinkMenu.tsx`, `useMessageLinkMenu` is the shared context-menu hook for both file links and external message links. When `position.x` and `position.y` are both zero, it anchors the menu to `trigger.getBoundingClientRect().left` and `.bottom`. The positioning test in `apps/web/src/components/chat/useMessageLinkMenu.test.tsx` covers this fallback and preserves positions where only one coordinate is zero.

Note: Learnings are effective only in the context of similar code segments. To apply general coding guidelines, please configure review instructions. You can manage existing learnings in the app.

✅ Action performed

Summary could not be generated.

@coderabbitai

coderabbitai Bot commented Sep 11, 2026 •

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@akj I will regenerate the summary.

The updated summary must state that useMessageLinkMenu handles the zero-coordinate fallback for both external links and file links. It must state that the regression test verifies the triggering link’s lower-left corner. It must not report this behavior as an unresolved warning.

The docstring-coverage warning remains unchanged. TestLinkMenu only mounts the already documented hook for positioning tests.


🧠 Learnings used
Learnt from: akj
URL: https://github.com/pingdotgg/t3code/pull/10391

Timestamp: 2026-09-11T23:25:43.523Z
Learning: In `apps/web/src/components/chat/useMessageLinkMenu.tsx`, `useMessageLinkMenu` is the shared context-menu hook for both file links and external message links. When `position.x` and `position.y` are both zero, it anchors the menu to `trigger.getBoundingClientRect().left` and `.bottom`. The positioning test in `apps/web/src/components/chat/useMessageLinkMenu.test.tsx` covers this fallback and preserves positions where only one coordinate is zero.
✅ Action performed

Summary regenerated.

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Note

This comment is posted by Julius' dot

The screenshot and recording show the new in-page menus, but neither provides the original native-menu view for comparison. This UI replacement still needs the before/after evidence required by verification. Please add a baseline capture alongside the supplied fixed-menu evidence, identify the tested builds, then request reconsideration.

@akj

akj commented Oct 3, 2026 •

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@juliusmarminge, I've added the baseline capture you asked for, so I'd like to ask you to reconsider this PR.

Before: on main, right-clicking a message link opens Windows' native menu with no item selected. After: this branch opens T3's in-page menu at the same spot with its first item focused.

Both captures are from the Windows desktop app (Electron 44.4.2), with the menu opened by right-clicking the same link in a test thread:

  • Before: main at 31a9da1.
  • After: this branch at 5fa20fe, which is that same main plus this PR's three web files.

The menus look alike on purpose: same items, same place. On main it's Windows' native menu, which can leave NVDA outside its options. With this PR it's T3's in-page menu, with focus already on the first item. Nothing visible changes on the web, where browsers already got the in-page menu.

I've also merged the latest main. Full-window captures are in the description.

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Message link context menus do not receive focus with screen readers on Windows

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