Crate hjkl_css 

Parser + AST for a CSS subset used to drive declarative UI styling.

Toolkit-agnostic — produces a Stylesheet of Rules plus a resolve() step that yields the property bag for a single node. Pair with an adapter crate (e.g. hjkl-css-floem) to map onto a specific UI framework’s style builder.

Supported:

• Type selectors (label, row), class selectors (.prompt), pseudo-class selectors (:hover, :focus, :active, :disabled, :selected), and combinations of the three on the same simple selector.
• Compound selectors with descendant ( ), child (>), adjacent-sibling (+), and general-sibling (~) combinators.
• Properties: color, background-color, padding, margin, width, height, display, flex-direction, flex-grow, flex-shrink, flex-basis, align-items, justify-content, gap, row-gap, column-gap, border, border-{top,right,bottom,left}, border-width, border-color, border-radius, outline, font-family, font-size, font-weight, font-style, text-align, line-height.
• Values: hex / rgb() / rgba() / named colors (CSS Level 1 + extras), lengths in px / % / unitless (treated as px), keywords, auto, unitless numbers, font-family lists, border shorthands.

Re-exports

pub use ast::Combinator;

pub use ast::Declaration;

pub use ast::Node;

pub use ast::PseudoClass;

pub use ast::Rule;

pub use ast::Selector;

pub use ast::SimpleSelector;

pub use ast::Stylesheet;

pub use error::ParseError;

pub use parse::parse;

pub use resolve::ResolvedStyle;

pub use value::Color;

pub use value::Length;

pub use value::SideValue;

pub use value::Value;

pub use value::expand_side_set;

pub use value::expand_sides;

Modules

ast

Parsed stylesheet representation. Each rule pairs one Selector (a chain of SimpleSelectors joined by Combinators) with one declaration block.

error

parse

Convert a CSS-subset string to a Stylesheet. Backed by cssparser’s tokenizer + StyleSheetParser. Compound selectors with descendant ( ), child (>), adjacent-sibling (+), and general-sibling (~) combinators are supported.

resolve

Stylesheet → declaration list for a given (target, ancestors, state).

value

Property values. v1 covers the handful needed by phase-1 properties (background-color, color, padding, margin, width, height); phase-2 adds Auto, Number, FontFamilyList, Border, and SideSet for mixed length/auto shorthands.