Add diff language highlighting for code blocks by Copilot · Pull Request #11301 · outline/outline

Copilot · 2026-01-29T13:04:00Z

Adds support for diff syntax highlighting in code blocks, enabling users to document configuration changes and code modifications with proper visual distinction between additions, deletions, and context.

Changes

Added diff language entry to codeLanguages object with refractor loader
Added test coverage for diff language identifier and label resolution

Usage

Users can now select "Diff" from the code block language menu to highlight unified diff format:

@@ -37,7 +37,7 @@ sql {
-       dialect = "sqlite"
+       dialect = "postgresql"

Addresses #8570

Original prompt

Add the diff language highlighting as described
#8570

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

Co-authored-by: tommoor <380914+tommoor@users.noreply.github.com>

CLAassistant · 2026-01-29T13:34:07Z

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This PR contains the following updates: | Package | Update | Change | |---|---|---| | [outline/outline](https://github.com/outline/outline) | minor | `1.4.0` → `1.5.0` | --- ### Release Notes <details> <summary>outline/outline (outline/outline)</summary> ### [`v1.5.0`](https://github.com/outline/outline/releases/tag/v1.5.0) [Compare Source](outline/outline@v1.4.0...v1.5.0) #### What's Changed ##### Improvements - Added sorting options to the search screen in [#11242](outline/outline#11242) - Added `diff` language highlighting for code blocks in [#11301](outline/outline#11301) - Allow `cmd+enter` to toggle all checkboxes in a selection in [#11322](outline/outline#11322) - Added support for currency sorting in tables in [#11332](outline/outline#11332) - Added a custom color picker for text highlights in [#11337](outline/outline#11337) - Clicking on a group in the share dialog now shows it's members in [#11338](outline/outline#11338) - Table headers are now sticky in [#11353](outline/outline#11353) - Importing toggle blocks from Notion is now supported in [#11371](outline/outline#11371) - All tables in settings now have right-click context menu support in [#11378](outline/outline#11378) - Added a hide/show completed items control for checkbox lists in [#11379](outline/outline#11379) - Markdown frontmatter is now converted to YAML code blocks on import in [#11420](outline/outline#11420) - Added a "Rename" option to sidebar context menus in [#11425](outline/outline#11425) - Added Alt-click to recursively expand or collapse sidebar documents and collections in [#11432](outline/outline#11432) - Added a preference for desktop notification badge with off, count, and indicator options in [#11436](outline/outline#11436) - Added alphabetic ordered list support to markdown import and paste in [#11446](outline/outline#11446) - Allow creating a new document before or after another in the sidebar in [#11453](outline/outline#11453) ##### Fixes - Preserved alignment and caption when replacing images in [#11407](outline/outline#11407) - Improved popularity scoring job performance in [#11293](outline/outline#11293) - Fixed downloading mermaid images from the lightbox in [#11300](outline/outline#11300) - Further popularity scoring performance improvements in [#11305](outline/outline#11305) - Fixed text truncation with emoji icons in sidebar in [#11307](outline/outline#11307) - Separated user input errors from internal errors for Sentry reporting in [#11308](outline/outline#11308) - Fixed editor focus loss on text link interaction in [#11310](outline/outline#11310) - Removed unnecessary Markdown conversion when importing HTML in [#11315](outline/outline#11315) - Fixed "New draft" from command menu leading to "Not found" in [#11316](outline/outline#11316) - Improved slow query in `CleanupDeletedDocumentsTask` in [#11317](outline/outline#11317) - Removed Babel from production dependencies in [#11318](outline/outline#11318) - Minor React performance optimizations in [#11319](outline/outline#11319) - Fixed share panel state for drafts in a shared parent in [#11320](outline/outline#11320) - Fixed embed option showing for links that cannot be embedded in [#11323](outline/outline#11323) - Fixed non-admins being unable to see public ACL attachments in [#11326](outline/outline#11326) - Fixed suggestion menu inserting at incorrect position when choosing with mouse in [#11327](outline/outline#11327) - Fixed passkey registration with non-standard HTTPS ports in [#11329](outline/outline#11329) - Fixed collapsed toggles not expanding when they contain the highlighted search result in [#11330](outline/outline#11330) - Fixed column and row selection not restoring after sort or align in [#11333](outline/outline#11333) - Renamed `DATABASE_READ_ONLY_URL` environment variable in [#11334](outline/outline#11334) - Fixed Safari print offset issue in [#11339](outline/outline#11339) - Permanently deleted documents are now removed from the local store in [#11344](outline/outline#11344) - Fixed overly broad catch-all on root share in [#11346](outline/outline#11346) - Removed hanging toggle sidebar button with no functionality in [#11350](outline/outline#11350) - Fixed tables with merged cells behaving incorrectly when sorting in [#11351](outline/outline#11351) - Fixed prefetching document structure for starred documents in [#11355](outline/outline#11355) - Refactored `activeDocumentId` handling in [#11144](outline/outline#11144) - Fixed missing outline on focused editable elements in [#11362](outline/outline#11362) - Fixed document creation routing to use the correct parameter name in [#11369](outline/outline#11369) - Fixed test snapshot in [#11391](outline/outline#11391) - Auto-compressed images by [@github-actions](https://github.com/github-actions)\[bot] in [#11394](outline/outline#11394) - Fixed test snapshot in [#11395](outline/outline#11395) - Fixed Sentry error resulting from browser extensions using MobX in [#11399](outline/outline#11399) - Fixed selection toolbar issues around link selection in [#11408](outline/outline#11408) - Removed unnecessary loading of authentication rows in `userProvisioner` in [#11413](outline/outline#11413) - Allowlisted more methods for CSRF skip in [#11414](outline/outline#11414) - Added `application_name` to database logging in [#11415](outline/outline#11415) - Fixed exporting a document with a table causing a crash in [#11422](outline/outline#11422) - Fixed an issue in active context creation due to a fallback in [#11426](outline/outline#11426) - Stopped using public ACL for avatars in [#11427](outline/outline#11427) - Fixed potential task queue saturation in the Notion importer in [#11428](outline/outline#11428) - Fixed edits containing only a mention below edit distance not triggering a notification in [#11434](outline/outline#11434) - Fixed missing check for disabled group mentions in [#11435](outline/outline#11435) - Fixed mispositioned toolbar on first document open in [#11437](outline/outline#11437) - Fixed creating a new document from the sidebar not redirecting correctly to edit mode in [#11442](outline/outline#11442) - Fixed collections with the same name overwriting each other in export in [#11443](outline/outline#11443) - Fixed notification badge not appearing until the notification popover was opened in [#11444](outline/outline#11444) - Translation locale files now load over `CDN_URL` for better performance in [#11445](outline/outline#11445) - Fixed synthetic "latest" revision failing to load in [#11451](outline/outline#11451) - Added missing tooltips in [#11452](outline/outline#11452) - Cleaned up the collection create dialog in [#11454](outline/outline#11454) - Fixed small race conditions in the diagrams.net integration in [#11458](outline/outline#11458) **Full Changelog**: <outline/outline@v1.4.0...v1.5.0> </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR is behind base branch, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] If you want to rebase/retry this PR, check this box --- This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).  Reviewed-on: https://gitea.alexlebens.dev/alexlebens/infrastructure/pulls/4012 Co-authored-by: Renovate Bot <renovate-bot@alexlebens.net> Co-committed-by: Renovate Bot <renovate-bot@alexlebens.net>

This PR contains the following updates: | Package | Update | Change | |---|---|---| | [outlinewiki/outline](https://github.com/outline/outline) | minor | `1.4.0` → `1.5.0` | --- ### Release Notes <details> <summary>outline/outline (outlinewiki/outline)</summary> ### [`v1.5.0`](https://github.com/outline/outline/releases/tag/v1.5.0) [Compare Source](outline/outline@v1.4.0...v1.5.0) ##### What's Changed ##### Improvements - Added sorting options to the search screen in [#11242](outline/outline#11242) - Added `diff` language highlighting for code blocks in [#11301](outline/outline#11301) - Allow `cmd+enter` to toggle all checkboxes in a selection in [#11322](outline/outline#11322) - Added support for currency sorting in tables in [#11332](outline/outline#11332) - Added a custom color picker for text highlights in [#11337](outline/outline#11337) - Clicking on a group in the share dialog now shows it's members in [#11338](outline/outline#11338) - Table headers are now sticky in [#11353](outline/outline#11353) - Importing toggle blocks from Notion is now supported in [#11371](outline/outline#11371) - All tables in settings now have right-click context menu support in [#11378](outline/outline#11378) - Added a hide/show completed items control for checkbox lists in [#11379](outline/outline#11379) - Markdown frontmatter is now converted to YAML code blocks on import in [#11420](outline/outline#11420) - Added a "Rename" option to sidebar context menus in [#11425](outline/outline#11425) - Added Alt-click to recursively expand or collapse sidebar documents and collections in [#11432](outline/outline#11432) - Added a preference for desktop notification badge with off, count, and indicator options in [#11436](outline/outline#11436) - Added alphabetic ordered list support to markdown import and paste in [#11446](outline/outline#11446) - Allow creating a new document before or after another in the sidebar in [#11453](outline/outline#11453) ##### Fixes - Preserved alignment and caption when replacing images in [#11407](outline/outline#11407) - Improved popularity scoring job performance in [#11293](outline/outline#11293) - Fixed downloading mermaid images from the lightbox in [#11300](outline/outline#11300) - Further popularity scoring performance improvements in [#11305](outline/outline#11305) - Fixed text truncation with emoji icons in sidebar in [#11307](outline/outline#11307) - Separated user input errors from internal errors for Sentry reporting in [#11308](outline/outline#11308) - Fixed editor focus loss on text link interaction in [#11310](outline/outline#11310) - Removed unnecessary Markdown conversion when importing HTML in [#11315](outline/outline#11315) - Fixed "New draft" from command menu leading to "Not found" in [#11316](outline/outline#11316) - Improved slow query in `CleanupDeletedDocumentsTask` in [#11317](outline/outline#11317) - Removed Babel from production dependencies in [#11318](outline/outline#11318) - Minor React performance optimizations in [#11319](outline/outline#11319) - Fixed share panel state for drafts in a shared parent in [#11320](outline/outline#11320) - Fixed embed option showing for links that cannot be embedded in [#11323](outline/outline#11323) - Fixed non-admins being unable to see public ACL attachments in [#11326](outline/outline#11326) - Fixed suggestion menu inserting at incorrect position when choosing with mouse in [#11327](outline/outline#11327) - Fixed passkey registration with non-standard HTTPS ports in [#11329](outline/outline#11329) - Fixed collapsed toggles not expanding when they contain the highlighted search result in [#11330](outline/outline#11330) - Fixed column and row selection not restoring after sort or align in [#11333](outline/outline#11333) - Renamed `DATABASE_READ_ONLY_URL` environment variable in [#11334](outline/outline#11334) - Fixed Safari print offset issue in [#11339](outline/outline#11339) - Permanently deleted documents are now removed from the local store in [#11344](outline/outline#11344) - Fixed overly broad catch-all on root share in [#11346](outline/outline#11346) - Removed hanging toggle sidebar button with no functionality in [#11350](outline/outline#11350) - Fixed tables with merged cells behaving incorrectly when sorting in [#11351](outline/outline#11351) - Fixed prefetching document structure for starred documents in [#11355](outline/outline#11355) - Refactored `activeDocumentId` handling in [#11144](outline/outline#11144) - Fixed missing outline on focused editable elements in [#11362](outline/outline#11362) - Fixed document creation routing to use the correct parameter name in [#11369](outline/outline#11369) - Fixed test snapshot in [#11391](outline/outline#11391) - Auto-compressed images by [@github-actions](https://github.com/github-actions)\[bot] in [#11394](outline/outline#11394) - Fixed test snapshot in [#11395](outline/outline#11395) - Fixed Sentry error resulting from browser extensions using MobX in [#11399](outline/outline#11399) - Fixed selection toolbar issues around link selection in [#11408](outline/outline#11408) - Removed unnecessary loading of authentication rows in `userProvisioner` in [#11413](outline/outline#11413) - Allowlisted more methods for CSRF skip in [#11414](outline/outline#11414) - Added `application_name` to database logging in [#11415](outline/outline#11415) - Fixed exporting a document with a table causing a crash in [#11422](outline/outline#11422) - Fixed an issue in active context creation due to a fallback in [#11426](outline/outline#11426) - Stopped using public ACL for avatars in [#11427](outline/outline#11427) - Fixed potential task queue saturation in the Notion importer in [#11428](outline/outline#11428) - Fixed edits containing only a mention below edit distance not triggering a notification in [#11434](outline/outline#11434) - Fixed missing check for disabled group mentions in [#11435](outline/outline#11435) - Fixed mispositioned toolbar on first document open in [#11437](outline/outline#11437) - Fixed creating a new document from the sidebar not redirecting correctly to edit mode in [#11442](outline/outline#11442) - Fixed collections with the same name overwriting each other in export in [#11443](outline/outline#11443) - Fixed notification badge not appearing until the notification popover was opened in [#11444](outline/outline#11444) - Translation locale files now load over `CDN_URL` for better performance in [#11445](outline/outline#11445) - Fixed synthetic "latest" revision failing to load in [#11451](outline/outline#11451) - Added missing tooltips in [#11452](outline/outline#11452) - Cleaned up the collection create dialog in [#11454](outline/outline#11454) - Fixed small race conditions in the diagrams.net integration in [#11458](outline/outline#11458) **Full Changelog**: <outline/outline@v1.4.0...v1.5.0> </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR is behind base branch, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] If you want to rebase/retry this PR, check this box --- This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).  Reviewed-on: https://gitea.alexlebens.dev/alexlebens/infrastructure/pulls/4013 Co-authored-by: Renovate Bot <renovate-bot@alexlebens.net> Co-committed-by: Renovate Bot <renovate-bot@alexlebens.net>

Initial plan

52e140c

Copilot AI assigned Copilot and tommoor Jan 29, 2026

Copilot started work on behalf of tommoor January 29, 2026 13:04 View session

Add diff language highlighting support

0398e71

Co-authored-by: tommoor <380914+tommoor@users.noreply.github.com>

Copilot AI changed the title ~~[WIP] Add diff language highlighting feature~~ Add diff language highlighting for code blocks Jan 29, 2026

Copilot AI requested a review from tommoor January 29, 2026 13:11

Copilot finished work on behalf of tommoor January 29, 2026 13:11

Styling

930dbf4

tommoor approved these changes Jan 29, 2026

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tommoor marked this pull request as ready for review January 29, 2026 13:34

auto-assign Bot requested a review from tommoor January 29, 2026 13:34

tommoor merged commit 7b62936 into main Jan 29, 2026
14 of 15 checks passed

tommoor deleted the copilot/add-diff-language-highlighting branch January 29, 2026 13:44

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Add diff language highlighting for code blocks#11301

Add diff language highlighting for code blocks#11301
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Copilot AI commented Jan 29, 2026 •

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