105 lines
2.5 KiB
TypeScript
105 lines
2.5 KiB
TypeScript
import * as tinycolor from 'tinycolor2';
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export type Theme = {
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id: string;
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name: string;
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author: string;
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desc?: string;
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base?: 'dark' | 'light';
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props: { [key: string]: string };
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};
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export const lightTheme: Theme = require('./themes/light.json5');
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export const darkTheme: Theme = require('./themes/dark.json5');
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export const builtinThemes = [
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lightTheme,
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darkTheme,
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require('./themes/lavender.json5'),
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require('./themes/halloween.json5'),
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require('./themes/garden.json5'),
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require('./themes/mauve.json5'),
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require('./themes/elegant.json5'),
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require('./themes/rainy.json5'),
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require('./themes/urban.json5'),
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require('./themes/cafe.json5'),
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require('./themes/chocolate.json5'),
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require('./themes/danboard.json5'),
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require('./themes/military.json5'),
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require('./themes/tweetdeck.json5'),
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];
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let timeout = null;
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export function applyTheme(theme: Theme, persist = true) {
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if (timeout) clearTimeout(timeout);
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document.documentElement.classList.add('changing-theme');
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timeout = setTimeout(() => {
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document.documentElement.classList.remove('changing-theme');
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}, 1000);
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// Deep copy
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const _theme = JSON.parse(JSON.stringify(theme));
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if (_theme.base) {
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const base = [lightTheme, darkTheme].find(x => x.id == _theme.base);
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_theme.props = Object.assign({}, base.props, _theme.props);
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}
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const props = compile(_theme);
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for (const tag of document.head.children) {
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if (tag.tagName === 'META' && tag.getAttribute('name') === 'theme-color') {
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tag.setAttribute('content', props['accent']);
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break;
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}
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}
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for (const [k, v] of Object.entries(props)) {
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document.documentElement.style.setProperty(`--${k}`, v.toString());
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}
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if (persist) {
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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.props[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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for (const [k, v] of Object.entries(theme.props)) {
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props[k] = genValue(getColor(v));
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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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