/*!
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* mp-html v2.5.1
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* https://github.com/jin-yufeng/mp-html
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*
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* Released under the MIT license
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* Author: Jin Yufeng
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*/
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const Parser = require('./parser')
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const plugins = []
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Component({
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data: {
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nodes: []
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},
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properties: {
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/**
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* @description 容器的样式
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* @type {String}
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*/
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containerStyle: String,
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/**
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* @description 用于渲染的 html 字符串
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* @type {String}
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*/
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content: {
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type: String,
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value: '',
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observer (content) {
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this.setContent(content)
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}
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},
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/**
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* @description 是否允许外部链接被点击时自动复制
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* @type {Boolean}
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* @default true
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*/
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copyLink: {
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type: Boolean,
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value: true
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},
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/**
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* @description 主域名，用于拼接链接
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* @type {String}
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*/
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domain: String,
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/**
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* @description 图片出错时的占位图链接
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* @type {String}
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*/
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errorImg: String,
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/**
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* @description 是否开启图片懒加载
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* @type {Boolean}
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* @default false
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*/
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lazyLoad: Boolean,
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/**
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* @description 图片加载过程中的占位图链接
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* @type {String}
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*/
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loadingImg: String,
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/**
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* @description 是否在播放一个视频时自动暂停其他视频
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* @type {Boolean}
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* @default true
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*/
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pauseVideo: {
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type: Boolean,
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value: true
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},
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/**
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* @description 是否允许图片被点击时自动预览
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* @type {Boolean | String}
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* @default true
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*/
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previewImg: {
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type: null,
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value: true
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},
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/**
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* @description 是否给每个表格添加一个滚动层使其能单独横向滚动
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* @type {Boolean}
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* @default false
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*/
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scrollTable: Boolean,
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/**
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* @description 是否开启长按复制
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* @type {Boolean | String}
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* @default false
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*/
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selectable: null,
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/**
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* @description 是否将 title 标签的内容设置到页面标题
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* @type {Boolean}
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* @default true
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*/
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setTitle: {
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type: Boolean,
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value: true
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},
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/**
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* @description 是否允许图片被长按时显示菜单
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* @type {Boolean}
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* @default true
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*/
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showImgMenu: {
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type: Boolean,
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value: true
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},
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/**
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* @description 标签的默认样式
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* @type {Object}
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*/
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tagStyle: Object,
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/**
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* @description 是否使用锚点链接
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* @type {Boolean | Number}
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* @default false
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*/
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useAnchor: null
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},
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created () {
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this.plugins = []
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for (let i = plugins.length; i--;) {
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this.plugins.push(new plugins[i](this))
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}
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// #ifdef MP-ALIPAY
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if (this.properties.content) {
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this.setContent(this.properties.content)
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}
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// #endif
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},
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// #ifdef MP-ALIPAY
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didUpdate (e) {
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if (e.content !== this.properties.content) {
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this.setContent(this.properties.content)
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}
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},
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// #endif
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detached () {
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// 注销插件
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this._hook('onDetached')
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},
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methods: {
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/**
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* @description 将锚点跳转的范围限定在一个 scroll-view 内
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* @param {Object} page scroll-view 所在页面的示例
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* @param {String} selector scroll-view 的选择器
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* @param {String} scrollTop scroll-view scroll-top 属性绑定的变量名
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*/
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in (page, selector, scrollTop) {
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if (page && selector && scrollTop) {
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this._in = {
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page,
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selector,
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scrollTop
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}
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}
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},
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/**
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* @description 锚点跳转
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* @param {String} id 要跳转的锚点 id
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* @param {Number} offset 跳转位置的偏移量
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* @returns {Promise}
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*/
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navigateTo (id, offset) {
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return new Promise((resolve, reject) => {
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if (!this.properties.useAnchor) {
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reject(Error('Anchor is disabled'))
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return
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}
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// 跨组件选择器
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const deep =
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// #ifdef MP-WEIXIN || MP-QQ || MP-TOUTIAO
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'>>>'
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// #endif
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// #ifdef MP-BAIDU || MP-ALIPAY
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' ' // eslint-disable-line
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// #endif
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const selector = wx.createSelectorQuery()
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// #ifndef MP-ALIPAY
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.in(this._in ? this._in.page : this)
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// #endif
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.select((this._in ? this._in.selector : '._root') + (id ? `${deep}#${id}` : '')).boundingClientRect()
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if (this._in) {
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selector.select(this._in.selector).scrollOffset()
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.select(this._in.selector).boundingClientRect()
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} else {
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// 获取 scroll-view 的位置和滚动距离
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selector.selectViewport().scrollOffset() // 获取窗口的滚动距离
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}
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selector.exec(res => {
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if (!res[0]) {
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reject(Error('Label not found'))
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return
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}
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const scrollTop = res[1].scrollTop + res[0].top - (res[2] ? res[2].top : 0) + (offset || parseInt(this.properties.useAnchor) || 0)
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if (this._in) {
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// scroll-view 跳转
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this._in.page.setData({
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[this._in.scrollTop]: scrollTop
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})
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} else {
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// 页面跳转
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wx.pageScrollTo({
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scrollTop,
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duration: 300
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})
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}
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resolve()
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})
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})
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},
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/**
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* @description 获取文本内容
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* @returns {String}
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*/
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getText (nodes) {
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let text = '';
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(function traversal (nodes) {
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for (let i = 0; i < nodes.length; i++) {
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const node = nodes[i]
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if (node.type === 'text') {
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text += node.text.replace(/&/g, '&')
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} else if (node.name === 'br') {
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text += '\n'
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} else {
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// 块级标签前后加换行
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const isBlock = node.name === 'p' || node.name === 'div' || node.name === 'tr' || node.name === 'li' || (node.name[0] === 'h' && node.name[1] > '0' && node.name[1] < '7')
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if (isBlock && text && text[text.length - 1] !== '\n') {
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text += '\n'
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}
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// 递归获取子节点的文本
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if (node.children) {
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traversal(node.children)
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}
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if (isBlock && text[text.length - 1] !== '\n') {
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text += '\n'
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} else if (node.name === 'td' || node.name === 'th') {
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text += '\t'
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}
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}
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}
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})(nodes || this.data.nodes)
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return text
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},
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/**
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* @description 获取内容大小
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* @returns {Promise}
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*/
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getRect () {
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return new Promise((resolve, reject) => {
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wx.createSelectorQuery()
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// #ifndef MP-ALIPAY
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.in(this)
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// #endif
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.select('._root').boundingClientRect().exec(res => res[0] ? resolve(res[0]) : reject(Error('Root label not found')))
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})
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},
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/**
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* @description 暂停播放媒体
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*/
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pauseMedia () {
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for (let i = (this._videos || []).length; i--;) {
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this._videos[i].pause()
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}
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},
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/**
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* @description 设置媒体播放速率
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* @param {Number} rate 播放速率
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*/
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setPlaybackRate (rate) {
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this.playbackRate = rate
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for (let i = (this._videos || []).length; i--;) {
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this._videos[i].playbackRate(rate)
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}
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},
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/**
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* @description 设置富文本内容
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* @param {string} content 要渲染的 html 字符串
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* @param {boolean} append 是否在尾部追加
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*/
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setContent (content, append) {
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if (!this.imgList || !append) {
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this.imgList = []
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}
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this._videos = []
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const data = {}
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const nodes = new Parser(this).parse(content)
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// 尾部追加内容
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if (append) {
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for (let i = this.data.nodes.length, j = nodes.length; j--;) {
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data[`nodes[${i + j}]`] = nodes[j]
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}
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} else {
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data.nodes = nodes
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}
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this.setData(data,
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// #ifndef MP-TOUTIAO
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() => {
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this._hook('onLoad')
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this.triggerEvent('load')
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}
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// #endif
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)
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// #ifdef MP-TOUTIAO
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this.selectComponent('#_root', child => {
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child.root = this
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this._hook('onLoad')
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this.triggerEvent('load')
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})
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// #endif
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if (this.properties.lazyLoad || this.imgList._unloadimgs < this.imgList.length / 2) {
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// 设置懒加载，每 350ms 获取高度，不变则认为加载完毕
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let height = 0
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const callback = rect => {
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if (!rect || !rect.height) rect = {}
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// 350ms 总高度无变化就触发 ready 事件
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if (rect.height === height) {
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this.triggerEvent('ready', rect)
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} else {
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height = rect.height
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setTimeout(() => {
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this.getRect().then(callback).catch(callback)
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}, 350)
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}
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}
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this.getRect().then(callback).catch(callback)
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} else {
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// 未设置懒加载，等待所有图片加载完毕
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if (!this.imgList._unloadimgs) {
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this.getRect().then(rect => {
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this.triggerEvent('ready', rect)
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}).catch(() => {
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this.triggerEvent('ready', {})
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})
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}
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}
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},
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/**
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* @description 调用插件的钩子函数
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* @private
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*/
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_hook (name) {
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for (let i = plugins.length; i--;) {
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if (this.plugins[i][name]) {
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this.plugins[i][name]()
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}
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}
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},
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// #ifndef MP-TOUTIAO
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/**
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* @description 添加子组件
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* @private
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*/
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_add (e) {
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e
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// #ifndef MP-ALIPAY
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.detail
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// #endif
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.root = this
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}
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// #endif
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}
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})
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