// 等待初始化完毕
|
document.addEventListener('UniAppJSBridgeReady', () => {
|
document.body.onclick = () =>
|
uni.postMessage({
|
data: {
|
action: 'onClick'
|
}
|
})
|
uni.postMessage({
|
data: {
|
action: 'onJSBridgeReady'
|
}
|
})
|
})
|
|
let options
|
let medias = []
|
|
/**
|
* @description 获取标签的所有属性
|
* @param {Element} ele
|
*/
|
function getAttrs (ele) {
|
const attrs = Object.create(null)
|
for (let i = ele.attributes.length; i--;) {
|
attrs[ele.attributes[i].name] = ele.attributes[i].value
|
}
|
return attrs
|
}
|
|
/**
|
* @description 图片加载出错
|
*/
|
function onImgError () {
|
if (options[1]) {
|
this.src = options[1]
|
this.onerror = null
|
}
|
// 取消监听点击
|
this.onclick = null
|
this.ontouchstart = null
|
uni.postMessage({
|
data: {
|
action: 'onError',
|
source: 'img',
|
attrs: getAttrs(this)
|
}
|
})
|
}
|
|
/**
|
* @description 检查是否所有图片加载完毕
|
*/
|
function checkReady () {
|
window.unloadimgs -= 1
|
if (window.unloadimgs === 0) {
|
// 所有图片加载完毕
|
uni.postMessage({
|
data: {
|
action: 'onReady'
|
}
|
})
|
}
|
}
|
|
/**
|
* @description 创建 dom 结构
|
* @param {object[]} nodes 节点数组
|
* @param {Element} parent 父节点
|
* @param {string} namespace 命名空间
|
*/
|
function createDom (nodes, parent, namespace) {
|
for (let i = 0; i < nodes.length; i++) {
|
const node = nodes[i]
|
let ele
|
if (!node.type || node.type === 'node') {
|
let name = node.name
|
// svg 需要设置 namespace
|
if (name === 'svg') {
|
namespace = 'http://www.w3.org/2000/svg'
|
}
|
if (name === 'html' || name === 'body') {
|
name = 'div'
|
}
|
// 创建标签
|
if (!namespace) {
|
ele = document.createElement(name)
|
} else {
|
ele = document.createElementNS(namespace, name)
|
}
|
// 设置属性
|
for (const item in node.attrs) {
|
ele.setAttribute(item, node.attrs[item])
|
}
|
// 递归创建子节点
|
if (node.children) {
|
createDom(node.children, ele, namespace)
|
}
|
|
// 处理图片
|
if (name === 'img') {
|
window.unloadimgs += 1
|
ele.onload = checkReady
|
ele.onerror = checkReady
|
if (!ele.src && ele.getAttribute('data-src')) {
|
ele.src = ele.getAttribute('data-src')
|
}
|
if (!node.attrs.ignore) {
|
// 监听图片点击事件
|
ele.onclick = function (e) {
|
e.stopPropagation()
|
uni.postMessage({
|
data: {
|
action: 'onImgTap',
|
attrs: getAttrs(this)
|
}
|
})
|
}
|
}
|
if (options[2]) {
|
const image = new Image()
|
image.src = ele.src
|
ele.src = options[2]
|
image.onload = function () {
|
ele.src = this.src
|
}
|
image.onerror = function () {
|
ele.onerror()
|
}
|
}
|
ele.onerror = onImgError
|
} else if (name === 'a') {
|
// 处理链接
|
ele.addEventListener('click', function (e) {
|
e.stopPropagation()
|
e.preventDefault() // 阻止默认跳转
|
const href = this.getAttribute('href')
|
let offset
|
if (href && href[0] === '#') {
|
offset = (document.getElementById(href.substr(1)) || {}).offsetTop
|
}
|
uni.postMessage({
|
data: {
|
action: 'onLinkTap',
|
attrs: getAttrs(this),
|
offset
|
}
|
})
|
}, true)
|
} else if (name === 'video' || name === 'audio') {
|
// 处理音视频
|
medias.push(ele)
|
if (!node.attrs.autoplay && !node.attrs.controls) {
|
ele.setAttribute('controls', 'true')
|
}
|
ele.onplay = function () {
|
uni.postMessage({
|
data: {
|
action: 'onPlay'
|
}
|
})
|
if (options[3]) {
|
for (let i = 0; i < medias.length; i++) {
|
if (medias[i] !== this) {
|
medias[i].pause()
|
}
|
}
|
}
|
}
|
ele.onerror = function () {
|
uni.postMessage({
|
data: {
|
action: 'onError',
|
source: name,
|
attrs: getAttrs(this)
|
}
|
})
|
}
|
} else if (name === 'table' && options[4] && !ele.style.cssText.includes('inline')) {
|
// 处理表格
|
const div = document.createElement('div')
|
div.style.overflow = 'auto'
|
div.appendChild(ele)
|
ele = div
|
} else if (name === 'svg') {
|
namespace = undefined
|
}
|
} else {
|
ele = document.createTextNode(node.text.replace(/&/g, '&'))
|
}
|
parent.appendChild(ele)
|
}
|
}
|
|
// 设置 html 内容
|
window.setContent = function (nodes, opts, append) {
|
const ele = document.getElementById('content')
|
|
// 容器样式
|
if (opts[0]) {
|
document.body.style.cssText = opts[0]
|
}
|
|
// 长按复制
|
if (!opts[5]) {
|
ele.style.userSelect = 'none'
|
}
|
|
if (!append) {
|
ele.innerHTML = '' // 不追加则先清空
|
medias = []
|
}
|
|
options = opts
|
window.unloadimgs = 0
|
const fragment = document.createDocumentFragment()
|
createDom(nodes, fragment)
|
ele.appendChild(fragment)
|
|
// 触发事件
|
let height = ele.scrollHeight
|
uni.postMessage({
|
data: {
|
action: 'onLoad',
|
height
|
}
|
})
|
if (!window.unloadimgs) {
|
uni.postMessage({
|
data: {
|
action: 'onReady',
|
height
|
}
|
})
|
}
|
|
clearInterval(window.timer)
|
window.timer = setInterval(() => {
|
if (ele.scrollHeight !== height) {
|
height = ele.scrollHeight
|
uni.postMessage({
|
data: {
|
action: 'onHeightChange',
|
height: height
|
}
|
})
|
}
|
}, 350)
|
}
|
|
// 回收计时器
|
window.onunload = function () {
|
clearInterval(window.timer)
|
}
|
