lib — the shared building blocks

The lib module collects the low-level primitives that widgets, the renderer, and applications all share. Each one is a small, focused module:

These types appear everywhere in the core API — a TextChunk carries RGBA colors and a u32 attribute mask; a BoxRenderable draws its border from BorderCharacters; the markdown and code renderables rely on unicode_util to lay out graphemes and on rgba to interpret color inputs.

Start with rgba (colors) and unicode_util (widths) — nearly every renderable touches both.

Summary

• lib module collects low-level primitives shared by widgets, renderer, and applications: RGBA colors, borders, styled text, unicode utilities, link detection, and terminal palette.
• rgba: RGBA, ColorInput, color parsing (hex, CSS names, ANSI-256), HSV conversion.
• border: BorderCharacters, BorderStyle, border presets, side configurations.
• styled_text: StyledText, TextChunk, UrlLink for rich text with colors and attributes.
• unicode_util: grapheme display widths, word_wrap for proper text measurement and wrapping.
• detect_links: URL detection in highlighted text for interactive links.
• terminal_palette: OSC-4 terminal palette detection for color theming.
• These types appear throughout the core API — TextChunk carries RGBA colors and attribute masks, BoxRenderable draws borders from BorderCharacters, markdown/code renderables rely on unicode_util for layout and rgba for color interpretation.