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+<template>
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+ <el-color-picker
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+ class="theme-picker"
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+ popper-class="theme-picker-dropdown"
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+ v-model="theme"></el-color-picker>
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+</template>
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+
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+<style>
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+ .theme-picker {
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+ height: 80px;
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+ display: inline-block;
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+ @utils-vertical-center;
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+ }
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+
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+ .theme-picker .el-color-picker__trigger {
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+ vertical-align: middle;
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+ }
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+
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+ .theme-picker-dropdown .el-color-dropdown__link-btn {
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+ display: none;
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+ }
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+</style>
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+
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+<script>
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+ import { version } from 'main/index.js';
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+
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+ const ORIGINAL_THEME = '#409EFF';
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+ export default {
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+ data() {
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+ return {
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+ chalk: '',
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+ theme: ORIGINAL_THEME
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+ };
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+ },
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+
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+ watch: {
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+ theme(val, oldVal) {
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+ if (typeof val !== 'string') return;
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+ const themeCluster = this.getThemeCluster(val.replace('#', ''));
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+ const originalCluster = this.getThemeCluster(oldVal.replace('#', ''));
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+ const handler = () => {
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+ const originalCluster = this.getThemeCluster(ORIGINAL_THEME.replace('#', ''));
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+ let newStyle = this.updateStyle(this.chalk, originalCluster, themeCluster);
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+
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+ let styleTag = document.getElementById('theme-style');
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+ if (!styleTag) {
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+ styleTag = document.createElement('style');
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+ styleTag.setAttribute('id', 'theme-style');
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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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+ if (!this.chalk) {
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+ this.getChalkString(handler);
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+ } else {
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+ handler();
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+ }
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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).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 = this.updateStyle(innerText, originalCluster, themeCluster);
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+ });
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+ }
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+ },
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+
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+ methods: {
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+ 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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+ getChalkString(callback) {
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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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+ this.chalk = xhr.responseText.replace(/@font-face{[^}]+}/, '');
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+ callback();
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+ }
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+ };
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+ xhr.open('GET', `https://unpkg.com/element-ui@${ version }/lib/theme-chalk/index.css`);
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+ xhr.send();
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+ },
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+
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+ getThemeCluster(theme) {
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+ const tintColor = (color, tint) => {
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+ let red = parseInt(color.slice(0, 2), 16);
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+ let green = parseInt(color.slice(2, 4), 16);
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+ let blue = parseInt(color.slice(4, 6), 16);
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+
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+ if (tint === 0) {
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+ return [red, green, blue].join(',');
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+ } else {
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+ red += Math.round(tint * (255 - red));
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+ green += Math.round(tint * (255 - green));
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+ blue += Math.round(tint * (255 - blue));
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+
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+ red = red.toString(16);
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+ green = green.toString(16);
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+ blue = blue.toString(16);
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+
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+ return `#${ red }${ green }${ blue }`;
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+ }
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+ };
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+
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+ const 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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+ return clusters;
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+ }
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+ }
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+ };
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+</script>
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Leopoldthecoder