feat: Miaou 0.4.0 - Cascading style system and built-in themes#111
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- Box_widget border style: added None_ for borderless containers. Pattern matches on border_style may need a new case. - Cascading style system with semantic styles and CSS-like selectors - Theme JSON support with discovery/merge rules and contrast validation - Effect-based Style_context for runtime theme access - Built-in themes: catppuccin, dracula, nord, gruvbox, tokyonight, opencode, oled - Theme registry API: list_builtin(), get_builtin(), load_any() - Textarea widget: multiline text input with cursor navigation - Foldable list widget: collapsible sections in gallery - Left-bordered box: context/quote blocks with colored border - Blocks spinner: animated spinner with gradient trail - Alt+Enter key parsing for textarea newlines - Mouse helper module with click, drag, wheel utilities - Mouse support for: Pager, Select, File Browser, Textbox, Textarea, Tabs, Breadcrumbs, Button, Link, Checkbox, Radio, Switch - Signal handling control via handle_sigint option - Per-side border colors for Box_widget - Canvas themed rendering with to_ansi_with_defaults - Theme dark_mode field for adaptive color resolution - Widget theming: all widgets use semantic themed styles - Containers fill contextual backgrounds across full width - Drivers apply themed foreground/background automatically - Theme JSON parsing: tolerant of partial objects, multiple color formats - Matrix driver: reduced flicker during periodic scrub - Terminal raw mode: proper SIGINT handling - Modal backgrounds: correct theming in light/dark modes Co-Authored-By: Claude <noreply@anthropic.com>
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Summary
Major release adding a comprehensive theming system with CSS-like selectors and 11 built-in themes.
Style System (
miaou_style)Style_contextfor runtime theme accessBuilt-in Themes
11 popular themes included directly in the library:
opencodeandoleduse borderless style for a clean, minimal lookoledfeatures true black background for OLED screensTheme Registry API
Builtin_themes.list_builtin()- list all themes with metadataBuiltin_themes.get_builtin(id)- load a theme by IDTheme_loader.load_any(name)- smart loading (built-in first, then user)New Widgets
Mouse Support
Wheel scrolling and click handling for: Pager, Select, File Browser, Textbox, Textarea, Tabs, Breadcrumbs, Button, Link, Checkbox, Radio, Switch
Other Features
dark_modefield in Theme.t for adaptive color resolutionto_ansi_with_defaultshandle_sigintoptionBreaking Changes
Box_widget.border_stylenow includesNone_for borderless containersTesting
dune build && dune runtestdune exec example/demos/style_system/main.exe