misskey/packages/frontend/src/scripts/theme.ts
2023-06-05 10:55:18 +09:00

151 lines
3.8 KiB
TypeScript

import { ref } from 'vue';
import tinycolor from 'tinycolor2';
import { globalEvents } from '@/events';
export type Theme = {
id: string;
name: string;
author: string;
desc?: string;
base?: 'dark' | 'light';
props: Record<string, string>;
};
import lightTheme from '@/themes/_light.json5';
import darkTheme from '@/themes/_dark.json5';
import { deepClone } from './clone';
import { miLocalStorage } from '@/local-storage';
export const themeProps = Object.keys(lightTheme.props).filter(key => !key.startsWith('X'));
export const getBuiltinThemes = () => Promise.all(
[
'l-light',
'l-coffee',
'l-apricot',
'l-rainy',
'l-botanical',
'l-vivid',
'l-cherry',
'l-sushi',
'l-u0',
'd-dark',
'd-persimmon',
'd-astro',
'd-future',
'd-botanical',
'd-green-lime',
'd-green-orange',
'd-cherry',
'd-ice',
'd-u0',
].map(name => import(`../themes/${name}.json5`).then(({ default: _default }): Theme => _default)),
);
export const getBuiltinThemesRef = () => {
const builtinThemes = ref<Theme[]>([]);
getBuiltinThemes().then(themes => builtinThemes.value = themes);
return builtinThemes;
};
let timeout = null;
export function applyTheme(theme: Theme, persist = true) {
if (timeout) window.clearTimeout(timeout);
document.documentElement.classList.add('_themeChanging_');
timeout = window.setTimeout(() => {
document.documentElement.classList.remove('_themeChanging_');
}, 1000);
const colorScheme = theme.base === 'dark' ? 'dark' : 'light';
// Deep copy
const _theme = deepClone(theme);
if (_theme.base) {
const base = [lightTheme, darkTheme].find(x => x.id === _theme.base);
if (base) _theme.props = Object.assign({}, base.props, _theme.props);
}
const props = compile(_theme);
for (const tag of document.head.children) {
if (tag.tagName === 'META' && tag.getAttribute('name') === 'theme-color') {
tag.setAttribute('content', props['htmlThemeColor']);
break;
}
}
for (const [k, v] of Object.entries(props)) {
document.documentElement.style.setProperty(`--${k}`, v.toString());
}
document.documentElement.style.setProperty('color-scheme', colorScheme);
if (persist) {
miLocalStorage.setItem('theme', JSON.stringify(props));
miLocalStorage.setItem('colorScheme', colorScheme);
}
// 色計算など再度行えるようにクライアント全体に通知
globalEvents.emit('themeChanged');
}
function compile(theme: Theme): Record<string, string> {
function getColor(val: string): tinycolor.Instance {
// ref (prop)
if (val[0] === '@') {
return getColor(theme.props[val.substr(1)]);
}
// ref (const)
else if (val[0] === '$') {
return getColor(theme.props[val]);
}
// func
else if (val[0] === ':') {
const parts = val.split('<');
const func = parts.shift().substr(1);
const arg = parseFloat(parts.shift());
const color = getColor(parts.join('<'));
switch (func) {
case 'darken': return color.darken(arg);
case 'lighten': return color.lighten(arg);
case 'alpha': return color.setAlpha(arg);
case 'hue': return color.spin(arg);
case 'saturate': return color.saturate(arg);
}
}
// other case
return tinycolor(val);
}
const props = {};
for (const [k, v] of Object.entries(theme.props)) {
if (k.startsWith('$')) continue; // ignore const
props[k] = v.startsWith('"') ? v.replace(/^"\s*/, '') : genValue(getColor(v));
}
return props;
}
function genValue(c: tinycolor.Instance): string {
return c.toRgbString();
}
export function validateTheme(theme: Record<string, any>): boolean {
if (theme.id == null || typeof theme.id !== 'string') return false;
if (theme.name == null || typeof theme.name !== 'string') return false;
if (theme.base == null || !['light', 'dark'].includes(theme.base)) return false;
if (theme.props == null || typeof theme.props !== 'object') return false;
return true;
}