import { ElMessage } from 'element-plus';
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import { genMixColor } from './gen-color'
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/**
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* 颜色转换函数
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* @method hexToRgb hex 颜色转 rgb 颜色
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* @method rgbToHex rgb 颜色转 Hex 颜色
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* @method getDarkColor 加深颜色值
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* @method getLightColor 变浅颜色值
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*/
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export function useChangeColor() {
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// str 颜色值字符串
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const hexToRgb = (str: string): any => {
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let hexs: any = '';
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let reg = /^\#?[0-9A-Fa-f]{6}$/;
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if (!reg.test(str)) {
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ElMessage.warning('输入错误的hex');
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return '';
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}
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str = str.replace('#', '');
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hexs = str.match(/../g);
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for (let i = 0; i < 3; i++) hexs[i] = parseInt(hexs[i], 16);
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return hexs;
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};
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// r 代表红色 | g 代表绿色 | b 代表蓝色
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const rgbToHex = (r: any, g: any, b: any): string => {
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let reg = /^\d{1,3}$/;
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if (!reg.test(r) || !reg.test(g) || !reg.test(b)) {
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ElMessage.warning('输入错误的rgb颜色值');
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return '';
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}
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let hexs = [r.toString(16), g.toString(16), b.toString(16)];
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for (let i = 0; i < 3; i++) if (hexs[i].length == 1) hexs[i] = `0${hexs[i]}`;
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return `#${hexs.join('')}`;
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};
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// color 颜色值字符串 | level 变浅的程度，限0-1之间
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const getDarkColor = (color: string, level: number): string => {
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let reg = /^\#?[0-9A-Fa-f]{6}$/;
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if (!reg.test(color)) {
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ElMessage.warning('输入错误的hex颜色值');
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return '';
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}
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let rgb = useChangeColor().hexToRgb(color);
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for (let i = 0; i < 3; i++) rgb[i] = Math.floor(rgb[i] * (1 - level));
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return useChangeColor().rgbToHex(rgb[0], rgb[1], rgb[2]);
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};
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// color 颜色值字符串 | level 加深的程度，限0-1之间
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const getLightColor = (color: string, level: number): string => {
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let reg = /^\#?[0-9A-Fa-f]{6}$/;
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if (!reg.test(color)) {
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ElMessage.warning('输入错误的hex颜色值');
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return '';
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}
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let rgb = useChangeColor().hexToRgb(color);
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for (let i = 0; i < 3; i++) rgb[i] = Math.floor((255 - rgb[i]) * level + rgb[i]);
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return useChangeColor().rgbToHex(rgb[0], rgb[1], rgb[2]);
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};
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return {
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hexToRgb,
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rgbToHex,
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getDarkColor,
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getLightColor,
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};
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}
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// 主题配置类型定义
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export type Theme = {
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// 这里留出可拓展空间（如banner图，背景图，文案，标题等），将主题色嵌套在对象内
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colors: {
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primary?: string;
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info?: string;
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warning?: string;
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success?: string;
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danger?: string;
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};
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};
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// 默认主题配置
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export const defaultThemeConfig: Theme = {
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colors: {
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primary: '#FF6A00',
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info: '#eeeeee',
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warning: '#fbbd23',
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danger: '#f87272',
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success: '#36d399',
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},
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};
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// 本地缓存 key
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const THEME_KEY = 'theme';
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// 获取本地缓存主题
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export const getTheme = (): Theme => {
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const theme = localStorage.getItem(THEME_KEY);
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return theme ? JSON.parse(theme) : defaultThemeConfig;
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};
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// 设置主题
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export const setTheme = (data = defaultThemeConfig) => {
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const oldTheme = getTheme();
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// 将传入配置与旧的主题合并，以填补缺省的值
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data = Object.assign({}, oldTheme, data);
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// 将缓存到浏览器
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localStorage.setItem(THEME_KEY, JSON.stringify(data));
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// TODO:将主题更新到css变量中，使之生效
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updateThemeColorVar(data);
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};
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// ...
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// 设置css变量
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function setStyleProperty(propName: string, value: string) {
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document.documentElement.style.setProperty(propName, value);
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}
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// 更新主题色到css变量
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function updateThemeColorVar({ colors }: Theme) {
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// 遍历当前主题色，生成混合色，并更新到css变量（tailwind + elementPlus）
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for (const brand in colors) {
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updateBrandExtendColorsVar(
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colors[brand as keyof Theme['colors']] as string,
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brand
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);
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}
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function updateBrandExtendColorsVar(color: string, name: string) {
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// TODO:生成混合色
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const { DEFAULT, dark, light } = genMixColor(color);
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// 每种主题色由浅到深分为五个阶梯以供开发者使用。
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setStyleProperty(`--${name}-lighter-color`, light[5]);
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setStyleProperty(`--${name}-light-color`, light[3]);
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setStyleProperty(`--${name}-color`, DEFAULT);
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setStyleProperty(`--${name}-deep-color`, dark[2]);
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setStyleProperty(`--${name}-deeper-color`, dark[4]);
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// elementPlus主题色更新
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setStyleProperty(`--el-color-${name}`, DEFAULT);
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setStyleProperty(`--el-color-${name}-dark-2`, dark[2]);
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setStyleProperty(`--el-color-${name}-light-3`, light[3]);
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setStyleProperty(`--el-color-${name}-light-5`, light[5]);
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setStyleProperty(`--el-color-${name}-light-7`, light[7]);
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setStyleProperty(`--el-color-${name}-light-8`, light[8]);
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setStyleProperty(`--el-color-${name}-light-9`, light[9]);
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}
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}
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