misskey/src/client/app/common/scripts/theme.ts

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import * as tinycolor from 'tinycolor2';
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const lightTheme = require('../../../theme/light');
const darkTheme = require('../../../theme/dark');
type Theme = {
meta: {
id: string;
name: string;
inherit: string;
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vars: any;
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};
} & {
[key: string]: string;
};
export default function(theme: Theme) {
if (theme.meta.inherit) {
const inherit = [lightTheme, darkTheme].find(x => x.meta.id == theme.meta.inherit);
theme = Object.assign({}, inherit, theme);
}
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const props = compile(theme);
Object.entries(props).forEach(([k, v]) => {
if (k == 'meta') return;
document.documentElement.style.setProperty(`--${k}`, v.toString());
});
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localStorage.setItem('theme', JSON.stringify(props));
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}
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function compile(theme: Theme): { [key: string]: string } {
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function getColor(code: string): tinycolor.Instance {
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// ref
if (code[0] == '@') {
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return getColor(theme[code.substr(1)]);
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}
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if (code[0] == '$') {
return getColor(theme.meta.vars[code.substr(1)]);
}
// func
if (code[0] == ':') {
const parts = code.split('<');
const func = parts.shift().substr(1);
const arg = parseInt(parts.shift(), 10);
const color = getColor(parts.join('<'));
switch (func) {
case 'darken': return color.darken(arg);
case 'lighten': return color.lighten(arg);
}
}
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return tinycolor(code);
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}
const props = {};
Object.entries(theme).forEach(([k, v]) => {
if (k == 'meta') return;
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const c = getColor(v);
props[k] = genValue(c);
props[`${k}-r`] = c.toRgb().r;
props[`${k}-g`] = c.toRgb().g;
props[`${k}-b`] = c.toRgb().b;
props[`${k}-a`] = c.toRgb().a;
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});
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const primary = getColor(props['primary']);
for (let i = 1; i < 10; i++) {
const color = primary.clone().setAlpha(i / 10);
props['primaryAlpha0' + i] = genValue(color);
}
for (let i = 1; i < 100; i++) {
const color = primary.clone().lighten(i);
props['primaryLighten' + i] = genValue(color);
}
for (let i = 1; i < 100; i++) {
const color = primary.clone().darken(i);
props['primaryDarken' + i] = genValue(color);
}
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return props;
}
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function genValue(c: tinycolor.Instance): string {
return c.toRgbString();
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}