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Support rgb() and rgba()

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This is used for default theme colors and decoration bg/fg.

Fixes #3814
This commit is contained in:
Daniel Imms
2022-05-19 09:23:36 -07:00
parent 51ef27894e
commit e3c361327c
2 changed files with 58 additions and 30 deletions
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src/common/Color.ts
+44 -30
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@@ -94,36 +94,50 @@ export namespace color {
*/
export namespace css {
export function toColor(css: string): IColor {
switch (css.length) {
case 4: // #rgb
return {
css,
rgba: channels.toRgba(
parseInt(css.slice(1, 2).repeat(2), 16),
parseInt(css.slice(2, 3).repeat(2), 16),
parseInt(css.slice(3, 4).repeat(2), 16)
)
};
case 5: // #rgba
return {
css,
rgba: channels.toRgba(
parseInt(css.slice(1, 2).repeat(2), 16),
parseInt(css.slice(2, 3).repeat(2), 16),
parseInt(css.slice(3, 4).repeat(2), 16),
parseInt(css.slice(4, 5).repeat(2), 16)
)
};
case 7: // #rrggbb
return {
css,
rgba: (parseInt(css.slice(1), 16) << 8 | 0xFF) >>> 0
};
case 9: // #rrggbbaa
return {
css,
rgba: parseInt(css.slice(1), 16) >>> 0
};
if (css.match(/#[0-9a-f]{3,8}/i)) {
switch (css.length) {
case 4: // #rgb
return {
css,
rgba: channels.toRgba(
parseInt(css.slice(1, 2).repeat(2), 16),
parseInt(css.slice(2, 3).repeat(2), 16),
parseInt(css.slice(3, 4).repeat(2), 16)
)
};
case 5: // #rgba
return {
css,
rgba: channels.toRgba(
parseInt(css.slice(1, 2).repeat(2), 16),
parseInt(css.slice(2, 3).repeat(2), 16),
parseInt(css.slice(3, 4).repeat(2), 16),
parseInt(css.slice(4, 5).repeat(2), 16)
)
};
case 7: // #rrggbb
return {
css,
rgba: (parseInt(css.slice(1), 16) << 8 | 0xFF) >>> 0
};
case 9: // #rrggbbaa
return {
css,
rgba: parseInt(css.slice(1), 16) >>> 0
};
}
}
const rgbaMatch = css.match(/rgba?\(\s*(\d{1,3})\s*,\s*(\d{1,3})\s*,\s*(\d{1,3})\s*(,\s*(\d{1,3})\s*)?\)/);
if (rgbaMatch) { // rgb() or rgba()
return {
css,
rgba: channels.toRgba(
parseInt(rgbaMatch[1]), // r
parseInt(rgbaMatch[2]), // g
parseInt(rgbaMatch[3]), // b
rgbaMatch[5] === undefined ? 0xFF : parseInt(rgbaMatch[5]) // a?
)
};
}
throw new Error('css.toColor: Unsupported css format');
}