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@@ -0,0 +1,127 @@
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+// 设置系统主题和主题色
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+import { showFullScreenLoading, tryHideFullScreenLoading } from './request-loading'
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+const version = require('element-ui/package.json').version // element-ui version from node_modules
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+const ORIGINAL_THEME = '#409EFF' // default color
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+
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+let chalk = ''
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+let theme = ''
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+
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+export const setTheme = async (val, isLoading) => { // 是否显示加载样式
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+ const oldVal = ORIGINAL_THEME
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+ if (typeof val !== 'string') return
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+ const themeCluster = getThemeCluster(val.replace('#', ''))
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+ const originalCluster = getThemeCluster(oldVal.replace('#', ''))
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+
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+ if(isLoading) {
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+ showFullScreenLoading()
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+ }
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+
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+ const getHandler = (variable, id) => {
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+ return () => {
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+ const originalCluster = getThemeCluster(ORIGINAL_THEME.replace('#', ''))
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+ const newStyle = updateStyle(chalk, originalCluster, themeCluster)
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+
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+ let styleTag = document.getElementById(id)
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+ if (!styleTag) {
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+ styleTag = document.createElement('style')
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+ styleTag.setAttribute('id', id)
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+ document.head.appendChild(styleTag)
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+ }
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+ styleTag.innerText = newStyle
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+ }
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+ }
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+
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+ if (!chalk) {
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+ const url = `https://unpkg.com/element-ui@${version}/lib/theme-chalk/index.css`
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+ await getCSSString(url, 'chalk')
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+ }
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+
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+ const chalkHandler = getHandler('chalk', 'chalk-style')
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+
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+ chalkHandler()
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+
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+ const styles = [].slice.call(document.querySelectorAll('style'))
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+ .filter(style => {
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+ const text = style.innerText
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+ return new RegExp(oldVal, 'i').test(text) && !/Chalk Variables/.test(text)
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+ })
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+ styles.forEach(style => {
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+ const { innerText } = style
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+ if (typeof innerText !== 'string') return
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+ style.innerText = updateStyle(innerText, originalCluster, themeCluster)
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+ })
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+
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+ const element = document.getElementById('app')
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+ element.style.setProperty('--color-primary', val)
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+
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+ if(isLoading) {
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+ tryHideFullScreenLoading()
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+ }
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+}
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+
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+function updateStyle(style, oldCluster, newCluster) {
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+ let newStyle = style
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+ oldCluster.forEach((color, index) => {
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+ newStyle = newStyle.replace(new RegExp(color, 'ig'), newCluster[index])
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+ })
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+ return newStyle
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+}
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+
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+function getCSSString(url, variable) {
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+ return new Promise(resolve => {
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+ const xhr = new XMLHttpRequest()
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+ xhr.onreadystatechange = () => {
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+ if (xhr.readyState === 4 && xhr.status === 200) {
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+ chalk = xhr.responseText.replace(/@font-face{[^}]+}/, '')
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+ resolve()
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+ }
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+ }
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+ xhr.open('GET', url)
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+ xhr.send()
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+ })
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+}
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+
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+function getThemeCluster(theme) {
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+ const tintColor = (color, tint) => {
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+ let red = parseInt(color.slice(0, 2), 16)
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+ let green = parseInt(color.slice(2, 4), 16)
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+ let blue = parseInt(color.slice(4, 6), 16)
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+
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+ if (tint === 0) { // when primary color is in its rgb space
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+ return [red, green, blue].join(',')
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+ } else {
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+ red += Math.round(tint * (255 - red))
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+ green += Math.round(tint * (255 - green))
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+ blue += Math.round(tint * (255 - blue))
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+
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+ red = red.toString(16)
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+ green = green.toString(16)
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+ blue = blue.toString(16)
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+
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+ return `#${red}${green}${blue}`
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+ }
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+ }
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+
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+ const shadeColor = (color, shade) => {
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+ let red = parseInt(color.slice(0, 2), 16)
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+ let green = parseInt(color.slice(2, 4), 16)
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+ let blue = parseInt(color.slice(4, 6), 16)
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+
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+ red = Math.round((1 - shade) * red)
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+ green = Math.round((1 - shade) * green)
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+ blue = Math.round((1 - shade) * blue)
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+
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+ red = red.toString(16)
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+ green = green.toString(16)
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+ blue = blue.toString(16)
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+
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+ return `#${red}${green}${blue}`
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+ }
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+
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+ const clusters = [theme]
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+ for (let i = 0; i <= 9; i++) {
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+ clusters.push(tintColor(theme, Number((i / 10).toFixed(2))))
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+ }
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+ clusters.push(shadeColor(theme, 0.1))
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+ return clusters
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+}
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