- Rename all options from pane_title_* to window_title_*
- Use foreground/background instead of fg/bg in color option names
- Change color options to to_color_or_none defaulting to None,
falling back to corresponding tab bar colors
- Add bell_symbol, activity_symbol, progress_percent template vars
using existing bell_on_tab and tab_activity_symbol options
- Add custom script support via window_title_bar.py in config dir
(draw_window_title function exposed as {custom} in templates)
- Update C structs, Python references, and regenerate config files
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Add an optional title bar that displays above or below each window pane
when multiple windows are visible in a tab. This is similar to tmux's
pane-border-format or Terminator's pane title bars.
New configuration options:
- pane_title_bar: none/top/bottom (default: none)
- pane_title_template: f-string template (same syntax as tab_title_template)
- active_pane_title_template: override for active pane
- pane_title_bar_active_fg/bg: colors for active pane title
- pane_title_bar_inactive_fg/bg: colors for inactive pane titles
- pane_title_bar_align: left/center/right text alignment
The title bars are rendered using virtual Screen objects registered with
the GPU, following the same model as the tab bar. Title bars are
automatically hidden when only a single window is visible.
Ref: https://github.com/kovidgoyal/kitty/discussions/9448
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Add a Go-based command_palette kitten that provides a searchable,
interactive overlay for browsing and triggering keyboard shortcuts
and actions.
- New Go kitten at kittens/command_palette/ with FZF fuzzy search,
grouped/flat views, and remote control action triggering
- Python collect_keys_data() does data collection, passed via stdin
- Navigation: arrows, ctrl+j/k (vim), ctrl+n/p (emacs), page up/down
- Enter triggers the selected action via RC command
- Help text displayed in footer for selected binding
- Added Go tests (main_test.go) and Python tests (command_palette.py)
Implements modern wide gamut color formats with CSS Color Module Level 4
gamut mapping, addressing PR feedback with Go implementation, performance
benchmarks, and reorganized documentation.
Features:
- OKLCH (perceptually uniform color space)
- CIE LAB (device-independent color space)
- CSS Color 4 compliant gamut mapping algorithm
- Inline comment support in color config parsing
Addressing PR Feedback:
1. Go Implementation (tools/utils/style/):
- Complete OKLCH and LAB parsing with gamut mapping
- Matches Python implementation structure
- Comprehensive test suite (all tests passing)
- Performance benchmarks showing acceptable overhead
2. Performance Benchmarks:
- OKLCH: ~4.6 µs/op
- LAB: ~1.5 µs/op
- 10 mixed colors: ~13 µs total
- Typical config (50 colors): <0.5ms startup impact
3. Documentation Reorganization:
- Moved detailed color docs to docs/wide-gamut-colors.rst
- Configuration docs now link to separate documentation
- Reduces size of main configuration documentation
Gamut Mapping:
- Binary search chroma reduction from CSS Color Module Level 4
- Preserves lightness and hue while reducing chroma for out-of-gamut colors
- Uses deltaE OK (JND threshold: 0.02) for perceptual difference
- Ensures graceful degradation on sRGB displays
Python Implementation:
- parse_oklch(): OKLCH color parsing with gamut mapping
- parse_lab(): CIE LAB parsing with gamut mapping via OKLCH conversion
- lab_to_oklch(): LAB to OKLCH conversion for consistent gamut mapping
- oklch_to_srgb_gamut_map(): CSS Color 4 gamut mapping algorithm
- srgb_to_oklab(): Reverse conversion for deltaE calculations
- deltaE_ok(): Perceptual color difference in OKLab space
Go Implementation:
- colorspaces.go: All color space conversions and gamut mapping
- wrapper.go: ParseColor() updated to support OKLCH and LAB
- Comprehensive test coverage with benchmarks
- Matches Python implementation behavior
Robustness:
- NaN and infinity validation in all color parsing functions
- Defense-in-depth with validation at parsing and gamut mapping levels
- Returns None/error for invalid input (consistent error handling)
- Validates before clamping operations to prevent NaN propagation
Files changed:
- Python: kitty/rgb.py, kitty_tests/datatypes.py (+250 lines)
- Go: tools/utils/style/colorspaces.go, wrapper.go (+350 lines, tests)
- Docs: docs/wide-gamut-colors.rst (moved from inline)
- Config: kitty/options/definition.py (simplified, links to docs)
References:
- CSS Color Module Level 4: https://www.w3.org/TR/css-color-4/
- OKLCH Color Space: https://bottosson.github.io/posts/oklab/🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
