108 lines
3 KiB
TypeScript
108 lines
3 KiB
TypeScript
/*
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* SPDX-FileCopyrightText: syuilo and misskey-project
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* SPDX-License-Identifier: AGPL-3.0-only
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*/
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import tinycolor from 'tinycolor2';
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import lightTheme from '@@/themes/_light.json5';
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import darkTheme from '@@/themes/_dark.json5';
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import type { BundledTheme } from 'shiki/themes';
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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: Record<string, string>;
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codeHighlighter?: {
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base: BundledTheme;
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overrides?: Record<string, any>;
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} | {
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base: '_none_';
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overrides: Record<string, any>;
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};
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};
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let timeout: number | null = null;
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export function assertIsTheme(theme: Record<string, unknown>): theme is Theme {
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return typeof theme === 'object' && theme !== null && 'id' in theme && 'name' in theme && 'author' in theme && 'props' in theme;
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}
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export function applyTheme(theme: Theme, persist = true) {
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if (timeout) window.clearTimeout(timeout);
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document.documentElement.classList.add('_themeChanging_');
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timeout = window.setTimeout(() => {
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document.documentElement.classList.remove('_themeChanging_');
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}, 1000);
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const colorScheme = theme.base === 'dark' ? 'dark' : 'light';
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document.documentElement.dataset.colorScheme = colorScheme;
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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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if (base) _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['htmlThemeColor']);
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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(`--${k}`, v.toString());
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}
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// iframeを正常に透過させるために、cssのcolor-schemeは `light dark;` 固定にしてある。style.scss参照
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}
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function compile(theme: Theme): Record<string, string> {
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function getColor(val: string): tinycolor.Instance {
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if (val[0] === '@') { // ref (prop)
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return getColor(theme.props[val.substring(1)]);
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} else if (val[0] === '$') { // ref (const)
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return getColor(theme.props[val]);
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} else if (val[0] === ':') { // func
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const parts = val.split('<');
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const func = parts.shift().substring(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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case 'hue': return color.spin(arg);
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case 'saturate': return color.saturate(arg);
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}
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}
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// other case
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return tinycolor(val);
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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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if (k.startsWith('$')) continue; // ignore const
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props[k] = v.startsWith('"') ? v.replace(/^"\s*/, '') : 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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