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fix: refresh diff colors on terminal theme changes

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Valdemar Høgsvig Lorenzen
2026-10-11 21:21:17 +02:00
parent d6f6203fb6
commit ffdd42fcce
55 changed files with 11999 additions and 24 deletions
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docs/editing.md
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@@ -300,7 +300,7 @@ In split diffs, changed text rows use muted red backgrounds in Before and muted
Character-wise highlighting is enabled automatically within paired changed lines: only changed graphemes receive a stronger red/green background, while common text retains the muted row tint. Combining sequences, wide characters, and expanded tabs keep their source geometry through horizontal scrolling and word wrap. Syntax/semantic foregrounds remain intact, and cursor/search/selection styles keep their normal precedence. Character ranges are cached with aligned rows; stable live edits refresh only the edited paired lines rather than computing character diffs during painting.
Diff backgrounds blend the terminal's default background with its red/green palette colors: a subtle 12% accent for changed rows and a stronger 28% accent for changed characters, both computed from the original background. Read-only OSC 11/4 queries run after the initial paint and again on terminal focus regain; cached colors apply across editor panes. If you switch terminal themes while vamp remains focused, switch away and back to refresh the tints. If the complete palette is unavailable within 250 ms, change backgrounds remain normal and gutter colors/markers still identify changes.
Diff backgrounds blend the terminal's default background with its red/green palette colors: an 18% accent for changed rows and a stronger 38% accent for changed characters, both computed from the original background. Read-only OSC 11/4 queries run after the initial paint and whenever a subscribed DEC 2031 color-scheme notification arrives, so supported terminals update tints while the editor stays focused, including changes between two themes with the same light/dark preference. Focus-regain queries remain the fallback for terminals without notifications; cached colors apply across editor panes. If the complete palette is unavailable within 250 ms, change backgrounds remain normal and gutter colors/markers still identify changes.
Missing counterparts use adjacent muted `╱` diagonals (U+2571, box drawings light diagonal) on the normal terminal background, one per column. Unlike the text slash `/`, this glyph is designed to reach cell corners so diagonals can join end to end across successive rows. Pixel-perfect joins depend on the terminal's font and line-spacing rendering. Actual empty source lines retain their normal/change background and are not hatched.