[PR #22214] [CLOSED] fix: prevent preceding character deletion when typing inline code backticks #26555

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GiteaMirror · 2026-04-20T06:34:15-05:00

GiteaMirror commented

2026-04-20 06:34:15 -05:00

📋 Pull Request Information

Original PR: https://github.com/open-webui/open-webui/pull/22214
Author: @MJ16MJ
Created: 3/4/2026
Status: ❌ Closed

Base: dev ← Head: fix/inline-code-preceding-char-deleted

📝 Commits (1)

bec19ca fix: prevent preceding character deletion when typing inline code backticks

📊 Changes

2 files changed (+22 additions, -1 deletions)

View changed files

📝 package.json (+1 -0)
📝 src/lib/components/common/RichTextInput.svelte (+21 -1)

📄 Description

Pull Request Checklist

Before submitting, make sure you've checked the following:

Target branch: dev
Description: Provided below.
Changelog: Included below.
Dependencies: Added @tiptap/extension-code as explicit dependency (already a transitive dep via @tiptap/starter-kit, same version ^3.0.7).
Testing: Manually verified the root cause by tracing TipTap's markInputRule logic with the default regex vs the fixed regex. The fix changes only the input rule regex pattern — all other Code mark behavior (keyboard shortcut, paste rules, rendering) remains unchanged.
Agentic AI Code: This PR has been reviewed and the fix has been verified by tracing through the TipTap source code.
Code review: Self-reviewed.
Git Hygiene: Single atomic commit, one logical change.
Title Prefix: fix:

Changelog Entry

Description

When "Rich Text Input for Chat" is enabled and a user types inline code using backticks immediately after text (e.g. Hello\123`), the character preceding the opening backtick is incorrectly deleted, resulting in Hell+123instead ofHello+123`.

Root cause: TipTap's default Code mark input rule uses the regex /(^|[^\x60])\x60([^\x60]+)\x60(?!\x60)$/. The first capture group [^\x60] captures the character before the opening backtick. When markInputRule processes the match, it calls tr.delete(range.from + startSpaces, textStart) which deletes everything from the match start to the code content — including that captured preceding character.

Fix: Override the Code extension from StarterKit with a custom extension (FixedCode) that uses a lookbehind assertion /(?<=[^\x60]|^)\x60([^\x60]+)\x60(?!\x60)$/ instead of a capture group, so the preceding character is never part of the match range.

Added

@tiptap/extension-code as explicit dependency (was already transitive via starter-kit)
FixedCode extension in RichTextInput.svelte that extends TipTap's Code mark with a corrected input rule

Changed

StarterKit configured with code: false to disable the default (buggy) Code mark
FixedCode added to the editor extensions list

Fixed

Preceding character no longer deleted when typing inline code backticks in Rich Text Input mode (e.g. Hello\123`` now correctly produces "Hello" + code("123"))

Security

N/A

Breaking Changes

N/A

Additional Information

Fixes [PR #688] [MERGED] Update README.md (#20417)
Confirmed reproducible by collaborator @silentoplayz on latest dev with "Rich Text Input for Chat" toggled on
The lookbehind (?<=...) is supported in all modern browsers (Chrome 62+, Firefox 78+, Safari 16.4+)
Only the input rule is overridden — keyboard shortcut (Mod+E), paste rules, and rendering remain unchanged from the default Code extension

Screenshots or Videos

Before (bug): Typing Hello\123`` produces "Hell" + code("123") — the "o" is deleted

After (fix): Typing Hello\123`` correctly produces "Hello" + code("123")

Contributor License Agreement

By submitting this pull request, I confirm that I have read and fully agree to the Contributor License Agreement (CLA), and I am providing my contributions under its terms.

_{🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.}

## 📋 Pull Request Information **Original PR:** https://github.com/open-webui/open-webui/pull/22214 **Author:** [@MJ16MJ](https://github.com/MJ16MJ) **Created:** 3/4/2026 **Status:** ❌ Closed **Base:** `dev` ← **Head:** `fix/inline-code-preceding-char-deleted` --- ### 📝 Commits (1) - [`bec19ca`](https://github.com/open-webui/open-webui/commit/bec19ca517245a1d993518ab4c5cb96de2209296) fix: prevent preceding character deletion when typing inline code backticks ### 📊 Changes **2 files changed** (+22 additions, -1 deletions) <details> <summary>View changed files</summary> 📝 `package.json` (+1 -0) 📝 `src/lib/components/common/RichTextInput.svelte` (+21 -1) </details> ### 📄 Description # Pull Request Checklist **Before submitting, make sure you've checked the following:** - [x] **Target branch:** `dev` - [x] **Description:** Provided below. - [x] **Changelog:** Included below. - [x] **Dependencies:** Added `@tiptap/extension-code` as explicit dependency (already a transitive dep via `@tiptap/starter-kit`, same version `^3.0.7`). - [x] **Testing:** Manually verified the root cause by tracing TipTap's `markInputRule` logic with the default regex vs the fixed regex. The fix changes only the input rule regex pattern — all other Code mark behavior (keyboard shortcut, paste rules, rendering) remains unchanged. - [x] **Agentic AI Code:** This PR has been reviewed and the fix has been verified by tracing through the TipTap source code. - [x] **Code review:** Self-reviewed. - [x] **Git Hygiene:** Single atomic commit, one logical change. - [x] **Title Prefix:** `fix:` # Changelog Entry ### Description When "Rich Text Input for Chat" is enabled and a user types inline code using backticks immediately after text (e.g. `Hello\`123\``), the character preceding the opening backtick is incorrectly deleted, resulting in `Hell` + `123` instead of `Hello` + `123`. **Root cause:** TipTap's default Code mark input rule uses the regex `/(^|[^\x60])\x60([^\x60]+)\x60(?!\x60)$/`. The first capture group `[^\x60]` captures the character **before** the opening backtick. When `markInputRule` processes the match, it calls `tr.delete(range.from + startSpaces, textStart)` which deletes everything from the match start to the code content — including that captured preceding character. **Fix:** Override the Code extension from StarterKit with a custom extension (`FixedCode`) that uses a lookbehind assertion `/(?<=[^\x60]|^)\x60([^\x60]+)\x60(?!\x60)$/` instead of a capture group, so the preceding character is never part of the match range. ### Added - `@tiptap/extension-code` as explicit dependency (was already transitive via starter-kit) - `FixedCode` extension in `RichTextInput.svelte` that extends TipTap's Code mark with a corrected input rule ### Changed - StarterKit configured with `code: false` to disable the default (buggy) Code mark - `FixedCode` added to the editor extensions list ### Fixed - Preceding character no longer deleted when typing inline code backticks in Rich Text Input mode (e.g. `Hello\`123\`` now correctly produces "Hello" + code("123")) ### Security - N/A ### Breaking Changes - N/A --- ### Additional Information - Fixes #20417 - Confirmed reproducible by collaborator @silentoplayz on latest `dev` with "Rich Text Input for Chat" toggled on - The lookbehind `(?<=...)` is supported in all modern browsers (Chrome 62+, Firefox 78+, Safari 16.4+) - Only the input rule is overridden — keyboard shortcut (Mod+E), paste rules, and rendering remain unchanged from the default Code extension ### Screenshots or Videos **Before (bug):** Typing `Hello\`123\`` produces "Hell" + code("123") — the "o" is deleted **After (fix):** Typing `Hello\`123\`` correctly produces "Hello" + code("123") ### Contributor License Agreement By submitting this pull request, I confirm that I have read and fully agree to the [Contributor License Agreement (CLA)](https://github.com/open-webui/open-webui/blob/main/CONTRIBUTOR_LICENSE_AGREEMENT), and I am providing my contributions under its terms. --- <sub>🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.</sub>

GiteaMirror added the pull-request label 2026-04-20 06:34:15 -05:00

GiteaMirror closed this issue

2026-04-20 06:34:17 -05:00

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Reference: github-starred/open-webui#26555