import * as tinycolor from 'tinycolor2'; export type Theme = { id: string; name: string; author: string; desc?: string; base?: 'dark' | 'light'; vars: { [key: string]: string }; props: { [key: string]: string }; }; export const lightTheme: Theme = require('../theme/light.json5'); export const darkTheme: Theme = require('../theme/dark.json5'); export const pinkTheme: Theme = require('../theme/pink.json5'); export const blackTheme: Theme = require('../theme/black.json5'); export const halloweenTheme: Theme = require('../theme/halloween.json5'); export const cafeTheme: Theme = require('../theme/cafe.json5'); export const japaneseSushiSetTheme: Theme = require('../theme/japanese-sushi-set.json5'); export const gruvboxDarkTheme: Theme = require('../theme/gruvbox-dark.json5'); export const monokaiTheme: Theme = require('../theme/monokai.json5'); export const builtinThemes = [ lightTheme, darkTheme, pinkTheme, blackTheme, halloweenTheme, cafeTheme, japaneseSushiSetTheme, gruvboxDarkTheme, monokaiTheme ]; export function applyTheme(theme: Theme, persisted = true) { // Deep copy const _theme = JSON.parse(JSON.stringify(theme)); if (_theme.base) { const base = [lightTheme, darkTheme].find(x => x.id == _theme.base); _theme.vars = Object.assign({}, base.vars, _theme.vars); _theme.props = Object.assign({}, base.props, _theme.props); } const props = compile(_theme); for (const [k, v] of Object.entries(props)) { document.documentElement.style.setProperty(`--${k}`, v.toString()); } if (persisted) { localStorage.setItem('theme', JSON.stringify(props)); } } function compile(theme: Theme): { [key: string]: string } { function getColor(code: string): tinycolor.Instance { // ref if (code[0] == '@') { return getColor(theme.props[code.substr(1)]); } if (code[0] == '$') { return getColor(theme.vars[code.substr(1)]); } // func if (code[0] == ':') { const parts = code.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); } } return tinycolor(code); } const props = {}; for (const [k, v] of Object.entries(theme.props)) { props[k] = genValue(getColor(v)); } 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); } return props; } function genValue(c: tinycolor.Instance): string { return c.toRgbString(); }