Enum CssColor 

pub enum CssColor {
    Rgba(u8, u8, u8, f32),
    Current,
    System(SystemColor),
}

A parsed CSS color value, before lowering to a terminal Color.

Terminal cells are opaque and know nothing of CSS inheritance, so translucency and contextual keywords survive parsing here and only collapse when a caller lowers them with the context it actually has.

Variants

Rgba(u8, u8, u8, f32)

An absolute color: sRGB channel bytes plus an alpha in [0, 1].

Current

The currentcolor keyword: the element’s own foreground.

System(SystemColor)

A system color keyword, resolved against the Theme.

Implementations

impl CssColor

pub fn parse(value: &str) -> Option<Self>

Parses any supported CSS color; None when value is not one.

pub const fn rgb(red: u8, green: u8, blue: u8) -> Self

An opaque absolute color.

pub fn resolve(self, theme: &Theme) -> Color

Lowers to a cell color with only a theme in hand: system colors read the theme, while currentcolor and fully transparent values become Color::Default — the terminal’s own pass-through color is the nearest thing to “inherit” and “let the background show”. Translucent values keep their color: without a backdrop there is nothing to blend with (see Self::composite).

pub fn composite(self, theme: &Theme, current: Color, backdrop: Color) -> Color

Lowers to a cell color with full context: currentcolor becomes current, system colors read the theme, and translucency is alpha-blended over backdrop. Blending needs concrete channels, so over a default or indexed backdrop full transparency yields the backdrop itself and partial translucency keeps the color.

Example

use omp_tui::{Color, CssColor, Theme};
let red = CssColor::parse("rgb(255 0 0 / 50%)").unwrap();
let lowered = red.composite(&Theme::default(), Color::Default, Color::Rgb(0, 0, 0));
assert_eq!(lowered, Color::Rgb(128, 0, 0));

Trait Implementations

impl Clone for CssColor

fn clone(&self) -> CssColor

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for CssColor

impl Debug for CssColor

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for CssColor

fn eq(&self, other: &CssColor) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for CssColor