mirror of https://github.com/jkjoy/sunpeiwen.git
287 lines
8.8 KiB
JavaScript
287 lines
8.8 KiB
JavaScript
/* global Fluid */
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/**
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* Modified from https://blog.skk.moe/post/hello-darkmode-my-old-friend/
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*/
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(function(window, document) {
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var rootElement = document.documentElement;
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var colorSchemaStorageKey = 'Fluid_Color_Scheme';
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var colorSchemaMediaQueryKey = '--color-mode';
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var userColorSchemaAttributeName = 'data-user-color-scheme';
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var defaultColorSchemaAttributeName = 'data-default-color-scheme';
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var colorToggleButtonSelector = '#color-toggle-btn';
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var colorToggleIconSelector = '#color-toggle-icon';
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var iframeSelector = 'iframe';
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function setLS(k, v) {
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try {
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localStorage.setItem(k, v);
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} catch (e) {}
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}
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function removeLS(k) {
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try {
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localStorage.removeItem(k);
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} catch (e) {}
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}
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function getLS(k) {
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try {
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return localStorage.getItem(k);
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} catch (e) {
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return null;
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}
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}
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function getSchemaFromHTML() {
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var res = rootElement.getAttribute(defaultColorSchemaAttributeName);
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if (typeof res === 'string') {
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return res.replace(/["'\s]/g, '');
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}
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return null;
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}
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function getSchemaFromCSSMediaQuery() {
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var res = getComputedStyle(rootElement).getPropertyValue(
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colorSchemaMediaQueryKey
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);
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if (typeof res === 'string') {
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return res.replace(/["'\s]/g, '');
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}
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return null;
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}
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function resetSchemaAttributeAndLS() {
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rootElement.setAttribute(userColorSchemaAttributeName, getDefaultColorSchema());
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removeLS(colorSchemaStorageKey);
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}
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var validColorSchemaKeys = {
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dark : true,
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light: true
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};
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function getDefaultColorSchema() {
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// 取默认字段的值
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var schema = getSchemaFromHTML();
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// 如果明确指定了 schema 则返回
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if (validColorSchemaKeys[schema]) {
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return schema;
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}
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// 默认优先按 prefers-color-scheme
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schema = getSchemaFromCSSMediaQuery();
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if (validColorSchemaKeys[schema]) {
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return schema;
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}
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// 否则按本地时间是否大于 18 点或凌晨 0 ~ 6 点
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var hours = new Date().getHours();
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if (hours >= 18 || (hours >= 0 && hours <= 6)) {
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return 'dark';
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}
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return 'light';
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}
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function applyCustomColorSchemaSettings(schema) {
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// 接受从「开关」处传来的模式，或者从 localStorage 读取，否则按默认设置值
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var current = schema || getLS(colorSchemaStorageKey) || getDefaultColorSchema();
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if (current === getDefaultColorSchema()) {
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// 当用户切换的显示模式和默认模式相同时，则恢复为自动模式
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resetSchemaAttributeAndLS();
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} else if (validColorSchemaKeys[current]) {
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rootElement.setAttribute(
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userColorSchemaAttributeName,
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current
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);
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} else {
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// 特殊情况重置
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resetSchemaAttributeAndLS();
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return;
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}
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// 根据当前模式设置图标
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setButtonIcon(current);
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// 设置代码高亮
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setHighlightCSS(current);
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// 设置其他应用
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setApplications(current);
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}
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var invertColorSchemaObj = {
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dark : 'light',
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light: 'dark'
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};
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function getIconClass(scheme) {
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return 'icon-' + scheme;
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}
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function toggleCustomColorSchema() {
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var currentSetting = getLS(colorSchemaStorageKey);
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if (validColorSchemaKeys[currentSetting]) {
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// 从 localStorage 中读取模式，并取相反的模式
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currentSetting = invertColorSchemaObj[currentSetting];
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} else if (currentSetting === null) {
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// 当 localStorage 中没有相关值，或者 localStorage 抛了 Error
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// 先按照按钮的状态进行切换
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var iconElement = document.querySelector(colorToggleIconSelector);
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if (iconElement) {
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currentSetting = iconElement.getAttribute('data');
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}
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if (!iconElement || !validColorSchemaKeys[currentSetting]) {
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// 当 localStorage 中没有相关值，或者 localStorage 抛了 Error，则读取默认值并切换到相反的模式
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currentSetting = invertColorSchemaObj[getSchemaFromCSSMediaQuery()];
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}
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} else {
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return;
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}
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// 将相反的模式写入 localStorage
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setLS(colorSchemaStorageKey, currentSetting);
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return currentSetting;
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}
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function setButtonIcon(schema) {
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if (validColorSchemaKeys[schema]) {
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// 切换图标
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var icon = getIconClass('dark');
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if (schema) {
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icon = getIconClass(schema);
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}
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var iconElement = document.querySelector(colorToggleIconSelector);
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if (iconElement) {
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iconElement.setAttribute(
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'class',
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'iconfont ' + icon
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);
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iconElement.setAttribute(
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'data',
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invertColorSchemaObj[schema]
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);
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} else {
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// 如果图标不存在则说明图标还没加载出来，等到页面全部加载再尝试切换
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Fluid.utils.waitElementLoaded(colorToggleIconSelector, function() {
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var iconElement = document.querySelector(colorToggleIconSelector);
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if (iconElement) {
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iconElement.setAttribute(
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'class',
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'iconfont ' + icon
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);
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iconElement.setAttribute(
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'data',
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invertColorSchemaObj[schema]
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);
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}
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});
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}
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if (document.documentElement.getAttribute('data-user-color-scheme')) {
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var color = getComputedStyle(document.documentElement).getPropertyValue('--navbar-bg-color').trim()
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document.querySelector('meta[name="theme-color"]').setAttribute('content', color)
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}
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}
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}
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function setHighlightCSS(schema) {
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// 启用对应的代码高亮的样式
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var lightCss = document.getElementById('highlight-css');
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var darkCss = document.getElementById('highlight-css-dark');
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if (schema === 'dark') {
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if (darkCss) {
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darkCss.removeAttribute('disabled');
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}
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if (lightCss) {
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lightCss.setAttribute('disabled', '');
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}
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} else {
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if (lightCss) {
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lightCss.removeAttribute('disabled');
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}
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if (darkCss) {
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darkCss.setAttribute('disabled', '');
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}
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}
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setTimeout(function() {
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// 设置代码块组件样式
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document.querySelectorAll('.markdown-body pre').forEach((pre) => {
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var cls = Fluid.utils.getBackgroundLightness(pre) >= 0 ? 'code-widget-light' : 'code-widget-dark';
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var widget = pre.querySelector('.code-widget-light, .code-widget-dark');
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if (widget) {
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widget.classList.remove('code-widget-light', 'code-widget-dark');
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widget.classList.add(cls);
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}
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});
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}, 200);
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}
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function setApplications(schema) {
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// 设置 remark42 评论主题
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if (window.REMARK42) {
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window.REMARK42.changeTheme(schema);
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}
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// 设置 cusdis 评论主题
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if (window.CUSDIS) {
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window.CUSDIS.setTheme(schema);
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}
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// 设置 utterances 评论主题
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var utterances = document.querySelector('.utterances-frame');
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if (utterances) {
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var utterancesTheme = schema === 'dark' ? window.UtterancesThemeDark : window.UtterancesThemeLight;
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const message = {
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type : 'set-theme',
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theme: utterancesTheme
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};
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utterances.contentWindow.postMessage(message, 'https://utteranc.es');
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}
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// 设置 giscus 评论主题
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var giscus = document.querySelector('iframe.giscus-frame');
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if (giscus) {
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var giscusTheme = schema === 'dark' ? window.GiscusThemeDark : window.GiscusThemeLight;
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const message = {
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setConfig: {
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theme: giscusTheme,
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}
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};
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giscus.style.cssText += 'color-scheme: normal;';
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giscus.contentWindow.postMessage({ 'giscus': message }, 'https://giscus.app');
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}
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}
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// 当页面加载时，将显示模式设置为 localStorage 中自定义的值（如果有的话）
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applyCustomColorSchemaSettings();
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Fluid.utils.waitElementLoaded(colorToggleIconSelector, function() {
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applyCustomColorSchemaSettings();
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var button = document.querySelector(colorToggleButtonSelector);
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if (button) {
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// 当用户点击切换按钮时，获得新的显示模式、写入 localStorage、并在页面上生效
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button.addEventListener('click', function() {
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applyCustomColorSchemaSettings(toggleCustomColorSchema());
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});
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var icon = document.querySelector(colorToggleIconSelector);
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if (icon) {
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// 光标悬停在按钮上时，切换图标
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button.addEventListener('mouseenter', function() {
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var current = icon.getAttribute('data');
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icon.classList.replace(getIconClass(invertColorSchemaObj[current]), getIconClass(current));
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});
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button.addEventListener('mouseleave', function() {
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var current = icon.getAttribute('data');
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icon.classList.replace(getIconClass(current), getIconClass(invertColorSchemaObj[current]));
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});
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}
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}
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});
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Fluid.utils.waitElementLoaded(iframeSelector, function() {
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applyCustomColorSchemaSettings();
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});
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})(window, document);
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