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367 lines
11 KiB
367 lines
11 KiB
3 years ago
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<template>
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<view id="_root" :class="(selectable?'_select ':'')+'_root'">
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<slot v-if="!nodes[0]" />
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<!-- #ifndef APP-PLUS-NVUE -->
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<node v-else :childs="nodes" :opts="[lazyLoad,loadingImg,errorImg,showImgMenu]" />
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<!-- #endif -->
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<!-- #ifdef APP-PLUS-NVUE -->
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<web-view ref="web" src="/static/app-plus/mp-html/local.html" :style="'margin-top:-2px;height:' + height + 'px'" @onPostMessage="_onMessage" />
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<!-- #endif -->
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</view>
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</template>
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<script>
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import props from './props.js';
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/**
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* mp-html v2.0.4
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* @description 富文本组件
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* @tutorial https://github.com/jin-yufeng/mp-html
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* @property {String} bgColor 背景颜色，只适用与APP-PLUS-NVUE
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* @property {String} content 用于渲染的富文本字符串（默认 true ）
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* @property {Boolean} copyLink 是否允许外部链接被点击时自动复制
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* @property {String} domain 主域名，用于拼接链接
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* @property {String} errorImg 图片出错时的占位图链接
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* @property {Boolean} lazyLoad 是否开启图片懒加载（默认 true ）
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* @property {string} loadingImg 图片加载过程中的占位图链接
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* @property {Boolean} pauseVideo 是否在播放一个视频时自动暂停其它视频（默认 true ）
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* @property {Boolean} previewImg 是否允许图片被点击时自动预览（默认 true ）
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* @property {Boolean} scrollTable 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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* @property {Boolean} selectable 是否开启长按复制
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* @property {Boolean} setTitle 是否将 title 标签的内容设置到页面标题（默认 true ）
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* @property {Boolean} showImgMenu 是否允许图片被长按时显示菜单（默认 true ）
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* @property {Object} tagStyle 标签的默认样式
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* @property {Boolean | Number} useAnchor 是否使用锚点链接
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*
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* @event {Function} load dom 结构加载完毕时触发
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* @event {Function} ready 所有图片加载完毕时触发
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* @event {Function} imgTap 图片被点击时触发
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* @event {Function} linkTap 链接被点击时触发
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* @event {Function} error 媒体加载出错时触发
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*/
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const plugins=[]
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const parser = require('./parser')
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// #ifndef APP-PLUS-NVUE
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import node from './node/node'
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// #endif
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// #ifdef APP-PLUS-NVUE
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const dom = weex.requireModule('dom')
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// #endif
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export default {
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name: 'mp-html',
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data() {
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return {
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nodes: [],
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// #ifdef APP-PLUS-NVUE
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height: 0
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// #endif
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}
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},
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mixins:[props],
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// #ifndef APP-PLUS-NVUE
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components: {
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node
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},
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// #endif
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watch: {
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content(content) {
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this.setContent(content)
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}
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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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mounted() {
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if (this.content && !this.nodes.length)
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this.setContent(this.content)
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},
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beforeDestroy() {
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this._hook('onDetached')
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clearInterval(this._timer)
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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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// #ifndef APP-PLUS-NVUE
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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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// #endif
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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.useAnchor)
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return reject('Anchor is disabled')
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offset = offset || parseInt(this.useAnchor) || 0
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// #ifdef APP-PLUS-NVUE
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if (!id) {
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dom.scrollToElement(this.$refs.web, {
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offset
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})
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resolve()
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} else {
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this._navigateTo = {
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resolve,
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reject,
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offset
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}
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this.$refs.web.evalJs('uni.postMessage({data:{action:"getOffset",offset:(document.getElementById(' + id + ')||{}).offsetTop}})')
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}
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// #endif
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// #ifndef APP-PLUS-NVUE
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let deep = ' '
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// #ifdef MP-WEIXIN || MP-QQ || MP-TOUTIAO
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deep = '>>>'
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// #endif
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const selector = uni.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() // 获取 scroll-view 的位置和滚动距离
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else
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selector.selectViewport().scrollOffset() // 获取窗口的滚动距离
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selector.exec(res => {
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if (!res[0])
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return reject('Label not found')
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const scrollTop = res[1].scrollTop + res[0].top - (res[2] ? res[2].top : 0) + offset
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if (this._in)
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// scroll-view 跳转
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this._in.page[this._in.scrollTop] = scrollTop
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else
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// 页面跳转
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uni.pageScrollTo({
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scrollTop,
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duration: 300
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})
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resolve()
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})
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// #endif
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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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* @return {String}
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*/
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getText() {
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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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// 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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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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})(this.nodes)
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return text
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},
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/**
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* @description 获取内容大小和位置
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* @return {Promise}
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*/
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getRect() {
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return new Promise((resolve, reject) => {
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uni.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('Root label not found'))
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})
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},
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/**
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* @description 设置内容
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* @param {String} content html 内容
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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 (!append || !this.imgList)
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this.imgList = []
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const nodes = new parser(this).parse(content)
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// #ifdef APP-PLUS-NVUE
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if (this._ready)
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this._set(nodes, append)
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// #endif
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this.$set(this, 'nodes', append ? (this.nodes || []).concat(nodes) : nodes)
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// #ifndef APP-PLUS-NVUE
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this._videos = []
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this.$nextTick(() => {
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this._hook('onLoad')
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this.$emit('load')
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})
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// 等待图片加载完毕
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let height
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clearInterval(this._timer)
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this._timer = setInterval(() => {
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this.getRect().then(rect => {
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// 350ms 总高度无变化就触发 ready 事件
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if (rect.height == height) {
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this.$emit('ready', rect)
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clearInterval(this._timer)
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}
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height = rect.height
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}).catch(() => { })
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}, 350)
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// #endif
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},
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/**
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* @description 调用插件钩子函数
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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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// #ifdef APP-PLUS-NVUE
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/**
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* @description 设置内容
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*/
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_set(nodes, append) {
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this.$refs.web.evalJs('setContent(' + JSON.stringify(nodes) + ',' + JSON.stringify([this.bgColor, this.errorImg, this.loadingImg, this.pauseVideo, this.scrollTable, this.selectable]) + ',' + append + ')')
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},
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/**
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* @description 接收到 web-view 消息
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*/
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_onMessage(e) {
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const message = e.detail.data[0]
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switch (message.action) {
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// web-view 初始化完毕
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case 'onJSBridgeReady':
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this._ready = true
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if (this.nodes)
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this._set(this.nodes)
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break
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// 内容 dom 加载完毕
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case 'onLoad':
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this.height = message.height
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this._hook('onLoad')
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this.$emit('load')
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break
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// 所有图片加载完毕
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case 'onReady':
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this.getRect().then(res => {
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this.$emit('ready', res)
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}).catch(() => { })
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break
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// 总高度发生变化
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case 'onHeightChange':
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this.height = message.height
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break
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// 图片点击
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case 'onImgTap':
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this.$emit('imgTap', message.attrs)
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if (this.previewImg)
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uni.previewImage({
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current: parseInt(message.attrs.i),
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urls: this.imgList
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})
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break
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// 链接点击
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case 'onLinkTap':
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const href = message.attrs.href
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this.$emit('linkTap', message.attrs)
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if (href) {
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// 锚点跳转
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if (href[0] == '#') {
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if (this.useAnchor)
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dom.scrollToElement(this.$refs.web, {
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offset: message.offset
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})
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}
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// 打开外链
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else if (href.includes('://')) {
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if (this.copyLink)
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plus.runtime.openWeb(href)
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}
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else
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uni.navigateTo({
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url: href,
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fail() {
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wx.switchTab({
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url: href
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})
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}
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})
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}
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break
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// 获取到锚点的偏移量
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case 'getOffset':
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if (typeof message.offset == 'number') {
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dom.scrollToElement(this.$refs.web, {
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offset: message.offset + this._navigateTo.offset
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})
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this._navigateTo.resolve()
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} else
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this._navigateTo.reject('Label not found')
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break
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// 点击
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case 'onClick':
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this.$emit('tap')
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break
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// 出错
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case 'onError':
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this.$emit('error', {
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source: message.source,
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attrs: message.attrs
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})
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}
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}
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// #endif
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}
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}
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</script>
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<style>
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/* #ifndef APP-PLUS-NVUE */
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/* 根节点样式 */
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._root {
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overflow: auto;
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-webkit-overflow-scrolling: touch;
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}
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/* 长按复制 */
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._select {
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user-select: text;
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}
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/* #endif */
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</style>
|