fix(terminal-next): handle OSC 52 clipboard sequences in terminal - #4774
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TUI programs running inside the terminal (opencode, vim, tmux etc.) set the clipboard by emitting OSC 52 sequences. xterm.js core does not register a handler for this identifier, so the sequence was silently dropped. In web/remote scenarios the native command fallback (osascript, xclip...) writes the clipboard of the machine hosting the backend instead of the user's browser clipboard, leaving copy features broken. Register an OSC 52 handler on each XTerm instance, decode the base64 payload as UTF-8 and write it through IClipboardService. Query sequences (payload '?') and malformed payloads are ignored without affecting normal terminal output.
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/next |
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🎉 PR Next publish successful! 3.9.1-next-1790235775.0 |
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Navigate logical layers of code changes, visualize relationships, and explore their blast radius. No actionable comments were generated in the recent review. 🎉 ℹ️ Recent review info⚙️ Run configurationConfiguration used: Repository UI Review profile: CHILL Plan: Advanced Run ID: 📒 Files selected for processing (1)
Included review availability: Your plan provides up to 8 included reviews per hour; 7 remain after this review. WalkthroughXTerm 新增 OSC 52 处理器，将符合条件的载荷解码并写入剪贴板。Playwright 主题持久化测试调整主题选择方式，并增加 Agentic 面板可见性检查。 ChangesOSC 52 剪贴板处理
Agentic 面板主题持久化测试
Priority: ⬇️ Low Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Bug fix Merge Risk: 🟡 Moderate · up to Terminal output can stop updating while a clipboard write remains pending. Let parsing continue without waiting for the clipboard operation before merging. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
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Actionable comments posted: 4
- 🪄 Fix CodeRabbit comments on this PR
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In `@packages/terminal-next/src/browser/xterm.ts`:
- Line 112: 在处理剪贴板写入的代码中，移除对 clipboardService.writeText 的等待，启动写入后异步处理失败，使 OSC
处理器立即返回且不阻塞终端输入解析。
- Line 112: Update BrowserClipboardService’s fallback to report whether
execCommand('copy') actually succeeded, and have _handleOsc52 avoid reporting
success when the clipboard was not updated. When browser user activation is
required, provide a user-click-triggered copy fallback; add a real-browser test
that verifies the permission behavior and clipboard result.
- Line 111: Update the TextDecoder used to produce text from bytes in the base64
payload handler to reject malformed UTF-8, allowing decoding failures to follow
the handler’s existing exception path. Add a test confirming an invalid UTF-8
payload such as `/w==` is ignored.
- Line 94: Update `_handleOsc52` to inspect the selection parameter before
passing the payload to `BrowserClipboardService`: accept an empty parameter or
one containing `c` or `s`, and ignore requests with other selection parameters.
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packages/terminal-next/__tests__/browser/xterm.test.tspackages/terminal-next/src/browser/xterm.ts
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The OSC 52 clipboard handler introduced in the XTerm constructor calls Terminal.parser.registerOscHandler, but the mocked Terminal class in client.test.ts does not expose a parser property. The constructor therefore throws inside TerminalClient.init (whose rejection is unhandled), leaving this.xterm undefined and failing every client test with a misleading 'Cannot read properties of undefined (reading raw)'.
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Additional details and impacted files@@ Coverage Diff @@
## main #4774 +/- ##
=======================================
Coverage 55.40% 55.40%
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Files 1762 1762
Lines 114271 114291 +20
Branches 25547 25559 +12
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+ Hits 63313 63328 +15
- Misses 42216 42221 +5
Partials 8742 8742
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…id UTF-8 Only handle OSC 52 sequences whose selection parameter is empty or contains c (clipboard) / s (primary selection); ignore other targets such as cut buffers, per xterm's control sequence docs. Decode the base64 payload with a fatal UTF-8 TextDecoder so payloads that are not valid UTF-8 are ignored instead of writing replacement characters to the clipboard.
The theme persistence e2e opened the command palette with Ctrl+Shift+P and clicked the re-rendering quickpick item; the item keeps detaching while the quickpick list re-renders, so the click retried until the 120s timeout on all retries (the same failure exists on main at 9fee6aa, so this is a pre-existing flake, not a regression of this branch). Execute workbench.action.selectTheme through the e2e command bridge and pick the theme option directly, backporting the stabilized version that already runs green on codex/improve-acp-error-message.
Ricbet
approved these changes
Sep 28, 2026
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TUI programs running inside the terminal (opencode, vim, tmux etc.) set the clipboard by emitting OSC 52 sequences. xterm.js core does not register a handler for this identifier, so the sequence was silently dropped. In web/remote scenarios the native command fallback (osascript, xclip...) writes the clipboard of the machine hosting the backend instead of the user's browser clipboard, leaving copy features broken.
Register an OSC 52 handler on each XTerm instance, decode the base64 payload as UTF-8 and write it through IClipboardService. Query sequences (payload '?') and malformed payloads are ignored without affecting normal terminal output.
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Summary by CodeRabbit
c、主选择目标s及空目标参数；cut buffer 目标0不会写入剪贴板。