feat(tui): color unified-diff lines inside code blocks - #135
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📝 WalkthroughWalkthroughMarkdown rendering now processes fenced code blocks as complete units. It detects explicit and automatic unified-diff blocks. It styles hunk headers, file headers, additions, removals, and context lines. Tests cover valid headers, false positives, context handling, and styling distinctions. ChangesMarkdown diff rendering
Estimated code review effort: 3 (Moderate) | ~25 minutes Merge Risk: 🔵 Low · up to Some ordinary code may be mistaken for a diff and cause nearby additions or deletions to display with incorrect colors. The PR is mergeable with owner awareness and a follow-up to tighten hunk-header matching and add rejection tests. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Fenced code blocks that are git diffs now render change lines with diff colors: @@ hunk headers in accent, + additions in success green, - deletions in failure red, and file headers bold. A block is treated as a diff when its fence language is diff or its body contains an @@ hunk header, so raw tool output pasted as a diff colors up without any markup.
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- hunk headers require the full `@@ -l,c +l,c @@` shape, so ordinary code lines that merely start with `@@` no longer switch the whole block into diff mode (section headings after the closing `@@` still work) - classification reads the original line, preserving the context-space marker: a context line whose content starts with `+` stays context - file headers require `+++ `/`--- ` followed by a path, so change lines whose content itself starts with `++`/`--` keep their add/remove colors
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Actionable comments posted: 1
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Inline comments:
In `@src/tui/content/markdown.rs`:
- Around line 117-140: Update is_diff_hunk_header to require the header at
column zero and match only the exact “@@ -start[,count] +start[,count] @@”
structure; remove leading-whitespace trimming and ensure is_hunk_range accepts
at most one optional comma/count. Add rejection tests for leading spaces,
reversed signs, and ranges with multiple commas.
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src/tui/content/markdown.rs
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- context lines whose content looks like a hunk header (" @@ -1 +1 @@")
no longer enable diff mode
- the old range must be minus-led and the new range plus-led, each with
at most one line-count segment ("@@ +1 -1 @@", "@@ -1,2,3 +1 @@" reject)
2 participants
Purpose
Color git-diff code blocks in the read view: @@\ hunk headers in accent, +\ additions in success green, -\ deletions in failure red, file headers bold.
Changes
Validation
Stacked on #134.
Summary by CodeRabbit
New Features
Bug Fixes