103 lines
2.3 KiB
TypeScript
103 lines
2.3 KiB
TypeScript
import * as tinycolor from 'tinycolor2';
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type Theme = {
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meta: {
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id: string;
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name: string;
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author: string;
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base?: string;
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vars: any;
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};
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} & {
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[key: string]: string;
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};
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export function applyTheme(theme: Theme, persisted = true) {
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if (theme.meta.base) {
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const base = [lightTheme, darkTheme].find(x => x.meta.id == theme.meta.base);
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theme = Object.assign({}, base, theme);
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}
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const props = compile(theme);
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Object.entries(props).forEach(([k, v]) => {
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if (k == 'meta') return;
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document.documentElement.style.setProperty(`--${k}`, v.toString());
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});
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if (persisted) {
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localStorage.setItem('theme', JSON.stringify(props));
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}
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}
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function compile(theme: Theme): { [key: string]: string } {
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function getColor(code: string): tinycolor.Instance {
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// ref
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if (code[0] == '@') {
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return getColor(theme[code.substr(1)]);
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}
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if (code[0] == '$') {
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return getColor(theme.meta.vars[code.substr(1)]);
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}
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// func
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if (code[0] == ':') {
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const parts = code.split('<');
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const func = parts.shift().substr(1);
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const arg = parseFloat(parts.shift());
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const color = getColor(parts.join('<'));
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switch (func) {
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case 'darken': return color.darken(arg);
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case 'lighten': return color.lighten(arg);
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case 'alpha': return color.setAlpha(arg);
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}
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}
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return tinycolor(code);
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}
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const props = {};
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Object.entries(theme).forEach(([k, v]) => {
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if (k == 'meta') return;
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const c = getColor(v);
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props[k] = genValue(c);
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});
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const primary = getColor(props['primary']);
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for (let i = 1; i < 10; i++) {
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const color = primary.clone().setAlpha(i / 10);
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props['primaryAlpha0' + i] = genValue(color);
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}
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for (let i = 1; i < 100; i++) {
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const color = primary.clone().lighten(i);
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props['primaryLighten' + i] = genValue(color);
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}
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for (let i = 1; i < 100; i++) {
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const color = primary.clone().darken(i);
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props['primaryDarken' + i] = genValue(color);
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}
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return props;
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}
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function genValue(c: tinycolor.Instance): string {
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return c.toRgbString();
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}
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export const lightTheme = require('../theme/light.json');
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export const darkTheme = require('../theme/dark.json');
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export const pinkTheme = require('../theme/pink.json');
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export const halloweenTheme = require('../theme/halloween.json');
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export const builtinThemes = [
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lightTheme,
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darkTheme,
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pinkTheme,
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halloweenTheme
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];
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