gree_leran/node_modules/uview-plus/components/u-parse/u-parse.vue

506 lines
13 KiB
Vue

<template>
<view id="_root" :class="(selectable ? '_select ' : '') + '_root'" :style="containerStyle">
<slot v-if="!nodes[0]" />
<!-- #ifndef APP-PLUS-NVUE -->
<node v-else :childs="nodes" :opts="[lazyLoad, loadingImg, errorImg, showImgMenu, selectable]" name="span" />
<!-- #endif -->
<!-- #ifdef APP-PLUS-NVUE -->
<web-view ref="web" src="/static/app-plus/mp-html/local.html" :style="'margin-top:-2px;height:' + height + 'px'" @onPostMessage="_onMessage" />
<!-- #endif -->
</view>
</template>
<script>
/**
* mp-html v2.4.1
* @description 富文本组件
* @tutorial https://github.com/jin-yufeng/mp-html
* @property {String} container-style 容器的样式
* @property {String} content 用于渲染的 html 字符串
* @property {Boolean} copy-link 是否允许外部链接被点击时自动复制
* @property {String} domain 主域名,用于拼接链接
* @property {String} error-img 图片出错时的占位图链接
* @property {Boolean} lazy-load 是否开启图片懒加载
* @property {string} loading-img 图片加载过程中的占位图链接
* @property {Boolean} pause-video 是否在播放一个视频时自动暂停其他视频
* @property {Boolean} preview-img 是否允许图片被点击时自动预览
* @property {Boolean} scroll-table 是否给每个表格添加一个滚动层使其能单独横向滚动
* @property {Boolean | String} selectable 是否开启长按复制
* @property {Boolean} set-title 是否将 title 标签的内容设置到页面标题
* @property {Boolean} show-img-menu 是否允许图片被长按时显示菜单
* @property {Object} tag-style 标签的默认样式
* @property {Boolean | Number} use-anchor 是否使用锚点链接
* @event {Function} load dom 结构加载完毕时触发
* @event {Function} ready 所有图片加载完毕时触发
* @event {Function} imgTap 图片被点击时触发
* @event {Function} linkTap 链接被点击时触发
* @event {Function} play 音视频播放时触发
* @event {Function} error 媒体加载出错时触发
*/
// #ifndef APP-PLUS-NVUE
import node from './node/node'
// #endif
import Parser from './parser'
const plugins = []
// #ifdef APP-PLUS-NVUE
const dom = weex.requireModule('dom')
// #endif
export default {
name: 'u-parse',
data() {
return {
nodes: [],
// #ifdef APP-PLUS-NVUE
height: 3
// #endif
}
},
props: {
containerStyle: {
type: String,
default: ''
},
content: {
type: String,
default: ''
},
copyLink: {
type: [Boolean, String],
default: true
},
domain: String,
errorImg: {
type: String,
default: ''
},
lazyLoad: {
type: [Boolean, String],
default: false
},
loadingImg: {
type: String,
default: ''
},
pauseVideo: {
type: [Boolean, String],
default: true
},
previewImg: {
type: [Boolean, String],
default: true
},
scrollTable: [Boolean, String],
selectable: [Boolean, String],
setTitle: {
type: [Boolean, String],
default: true
},
showImgMenu: {
type: [Boolean, String],
default: true
},
tagStyle: Object,
useAnchor: [Boolean, Number]
},
// #ifdef VUE3
emits: ['load', 'ready', 'imgTap', 'linkTap', 'play', 'error'],
// #endif
// #ifndef APP-PLUS-NVUE
components: {
node
},
// #endif
watch: {
content(content) {
this.setContent(content)
}
},
created() {
this.plugins = []
for (let i = plugins.length; i--;) {
this.plugins.push(new plugins[i](this))
}
},
mounted() {
if (this.content && !this.nodes.length) {
this.setContent(this.content)
}
},
// #ifdef VUE2
// beforeDestroy()
// #endif
// #ifdef VUE3
beforeUnmount()
// #endif
{
this._hook('onDetached')
},
methods: {
/**
* @description 将锚点跳转的范围限定在一个 scroll-view 内
* @param {Object} page scroll-view 所在页面的示例
* @param {String} selector scroll-view 的选择器
* @param {String} scrollTop scroll-view scroll-top 属性绑定的变量名
*/
in(page, selector, scrollTop) {
// #ifndef APP-PLUS-NVUE
if (page && selector && scrollTop) {
this._in = {
page,
selector,
scrollTop
}
}
// #endif
},
/**
* @description 锚点跳转
* @param {String} id 要跳转的锚点 id
* @param {Number} offset 跳转位置的偏移量
* @returns {Promise}
*/
navigateTo(id, offset) {
return new Promise((resolve, reject) => {
if (!this.useAnchor) {
reject(Error('Anchor is disabled'))
return
}
offset = offset || parseInt(this.useAnchor) || 0
// #ifdef APP-PLUS-NVUE
if (!id) {
dom.scrollToElement(this.$refs.web, {
offset
})
resolve()
} else {
this._navigateTo = {
resolve,
reject,
offset
}
this.$refs.web.evalJs('uni.postMessage({data:{action:"getOffset",offset:(document.getElementById(' + id + ')||{}).offsetTop}})')
}
// #endif
// #ifndef APP-PLUS-NVUE
let deep = ' '
// #ifdef MP-WEIXIN || MP-QQ || MP-TOUTIAO
deep = '>>>'
// #endif
const selector = uni.createSelectorQuery()
// #ifndef MP-ALIPAY
.in(this._in ? this._in.page : this)
// #endif
.select((this._in ? this._in.selector : '._root') + (id ? `${deep}#${id}` : '')).boundingClientRect()
if (this._in) {
selector.select(this._in.selector).scrollOffset()
.select(this._in.selector).boundingClientRect()
} else {
// 获取 scroll-view 的位置和滚动距离
selector.selectViewport().scrollOffset() // 获取窗口的滚动距离
}
selector.exec(res => {
if (!res[0]) {
reject(Error('Label not found'))
return
}
const scrollTop = res[1].scrollTop + res[0].top - (res[2] ? res[2].top : 0) + offset
if (this._in) {
// scroll-view 跳转
this._in.page[this._in.scrollTop] = scrollTop
} else {
// 页面跳转
uni.pageScrollTo({
scrollTop,
duration: 300
})
}
resolve()
})
// #endif
})
},
/**
* @description 获取文本内容
* @return {String}
*/
getText(nodes) {
let text = '';
(function traversal(nodes) {
for (let i = 0; i < nodes.length; i++) {
const node = nodes[i]
if (node.type === 'text') {
text += node.text.replace(/&amp;/g, '&')
} else if (node.name === 'br') {
text += '\n'
} else {
// 块级标签前后加换行
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')
if (isBlock && text && text[text.length - 1] !== '\n') {
text += '\n'
}
// 递归获取子节点的文本
if (node.children) {
traversal(node.children)
}
if (isBlock && text[text.length - 1] !== '\n') {
text += '\n'
} else if (node.name === 'td' || node.name === 'th') {
text += '\t'
}
}
}
})(nodes || this.nodes)
return text
},
/**
* @description 获取内容大小和位置
* @return {Promise}
*/
getRect() {
return new Promise((resolve, reject) => {
uni.createSelectorQuery()
// #ifndef MP-ALIPAY
.in(this)
// #endif
.select('#_root').boundingClientRect().exec(res => res[0] ? resolve(res[0]) : reject(Error('Root label not found')))
})
},
/**
* @description 暂停播放媒体
*/
pauseMedia() {
for (let i = (this._videos || []).length; i--;) {
this._videos[i].pause()
}
// #ifdef APP-PLUS
const command = 'for(var e=document.getElementsByTagName("video"),i=e.length;i--;)e[i].pause()'
// #ifndef APP-PLUS-NVUE
let page = this.$parent
while (!page.$scope) page = page.$parent
page.$scope.$getAppWebview().evalJS(command)
// #endif
// #ifdef APP-PLUS-NVUE
this.$refs.web.evalJs(command)
// #endif
// #endif
},
/**
* @description 设置媒体播放速率
* @param {Number} rate 播放速率
*/
setPlaybackRate(rate) {
this.playbackRate = rate
for (let i = (this._videos || []).length; i--;) {
this._videos[i].playbackRate(rate)
}
// #ifdef APP-PLUS
const command = 'for(var e=document.getElementsByTagName("video"),i=e.length;i--;)e[i].playbackRate=' + rate
// #ifndef APP-PLUS-NVUE
let page = this.$parent
while (!page.$scope) page = page.$parent
page.$scope.$getAppWebview().evalJS(command)
// #endif
// #ifdef APP-PLUS-NVUE
this.$refs.web.evalJs(command)
// #endif
// #endif
},
/**
* @description 设置内容
* @param {String} content html 内容
* @param {Boolean} append 是否在尾部追加
*/
setContent(content, append) {
if (!append || !this.imgList) {
this.imgList = []
}
const nodes = new Parser(this).parse(content)
// #ifdef APP-PLUS-NVUE
if (this._ready) {
this._set(nodes, append)
}
// #endif
this.$set(this, 'nodes', append ? (this.nodes || []).concat(nodes) : nodes)
// #ifndef APP-PLUS-NVUE
this._videos = []
this.$nextTick(() => {
this._hook('onLoad')
this.$emit('load')
})
if (this.lazyLoad || this.imgList._unloadimgs < this.imgList.length / 2) {
// 设置懒加载,每 350ms 获取高度,不变则认为加载完毕
let height = 0
const callback = rect => {
if (!rect || !rect.height) rect = {}
// 350ms 总高度无变化就触发 ready 事件
if (rect.height === height) {
this.$emit('ready', rect)
} else {
height = rect.height
setTimeout(() => {
this.getRect().then(callback).catch(callback)
}, 350)
}
}
this.getRect().then(callback).catch(callback)
} else {
// 未设置懒加载,等待所有图片加载完毕
if (!this.imgList._unloadimgs) {
this.getRect().then(rect => {
this.$emit('ready', rect)
}).catch(() => {
this.$emit('ready', {})
})
}
}
// #endif
},
/**
* @description 调用插件钩子函数
*/
_hook(name) {
for (let i = plugins.length; i--;) {
if (this.plugins[i][name]) {
this.plugins[i][name]()
}
}
},
// #ifdef APP-PLUS-NVUE
/**
* @description 设置内容
*/
_set(nodes, append) {
this.$refs.web.evalJs('setContent(' + JSON.stringify(nodes).replace(/%22/g, '') + ',' + JSON.stringify([this.containerStyle.replace(/(?:margin|padding)[^;]+/g, ''), this.errorImg, this.loadingImg, this.pauseVideo, this.scrollTable, this.selectable]) + ',' + append + ')')
},
/**
* @description 接收到 web-view 消息
*/
_onMessage(e) {
const message = e.detail.data[0]
switch (message.action) {
// web-view 初始化完毕
case 'onJSBridgeReady':
this._ready = true
if (this.nodes) {
this._set(this.nodes)
}
break
// 内容 dom 加载完毕
case 'onLoad':
this.height = message.height
this._hook('onLoad')
this.$emit('load')
break
// 所有图片加载完毕
case 'onReady':
this.getRect().then(res => {
this.$emit('ready', res)
}).catch(() => {
this.$emit('ready', {})
})
break
// 总高度发生变化
case 'onHeightChange':
this.height = message.height
break
// 图片点击
case 'onImgTap':
this.$emit('imgTap', message.attrs)
if (this.previewImg) {
uni.previewImage({
current: parseInt(message.attrs.i),
urls: this.imgList
})
}
break
// 链接点击
case 'onLinkTap': {
const href = message.attrs.href
this.$emit('linkTap', message.attrs)
if (href) {
// 锚点跳转
if (href[0] === '#') {
if (this.useAnchor) {
dom.scrollToElement(this.$refs.web, {
offset: message.offset
})
}
} else if (href.includes('://')) {
// 打开外链
if (this.copyLink) {
plus.runtime.openWeb(href)
}
} else {
uni.navigateTo({
url: href,
fail() {
uni.switchTab({
url: href
})
}
})
}
}
break
}
case 'onPlay':
this.$emit('play')
break
// 获取到锚点的偏移量
case 'getOffset':
if (typeof message.offset === 'number') {
dom.scrollToElement(this.$refs.web, {
offset: message.offset + this._navigateTo.offset
})
this._navigateTo.resolve()
} else {
this._navigateTo.reject(Error('Label not found'))
}
break
// 点击
case 'onClick':
this.$emit('tap')
this.$emit('click')
break
// 出错
case 'onError':
this.$emit('error', {
source: message.source,
attrs: message.attrs
})
}
}
// #endif
}
}
</script>
<style>
/* #ifndef APP-PLUS-NVUE */
/* 根节点样式 */
._root {
padding: 1px 0;
overflow-x: auto;
overflow-y: hidden;
-webkit-overflow-scrolling: touch;
}
/* 长按复制 */
._select {
user-select: text;
}
/* #endif */
</style>