'use strict'
/**
* @fileoverview html 解析器
*/
// 配置
const config = {
// 信任的标签（保持标签名不变）
trustTags: makeMap('a,abbr,ad,audio,b,blockquote,br,code,col,colgroup,dd,del,dl,dt,div,em,fieldset,h1,h2,h3,h4,h5,h6,hr,i,img,ins,label,legend,li,ol,p,q,ruby,rt,source,span,strong,sub,sup,table,tbody,td,tfoot,th,thead,tr,title,ul,video'),
// 块级标签（转为 div，其他的非信任标签转为 span）
blockTags: makeMap('address,article,aside,body,caption,center,cite,footer,header,html,nav,pre,section'),
// 要移除的标签
ignoreTags: makeMap('area,base,canvas,embed,frame,head,iframe,input,link,map,meta,param,rp,script,source,style,textarea,title,track,wbr'),
// 自闭合的标签
voidTags: makeMap('area,base,br,col,circle,ellipse,embed,frame,hr,img,input,line,link,meta,param,path,polygon,rect,source,track,use,wbr'),
// html 实体
entities: {
lt: '<',
gt: '>',
quot: '"',
apos: "'",
ensp: '\u2002',
emsp: '\u2003',
nbsp: '\xA0',
semi: ';',
ndash: '–',
mdash: '—',
middot: '·',
lsquo: '‘',
rsquo: '’',
ldquo: '“',
rdquo: '”',
bull: '•',
hellip: '…'
},
// 默认的标签样式
tagStyle: {
// #ifndef APP-PLUS-NVUE
address: 'font-style:italic',
big: 'display:inline;font-size:1.2em',
caption: 'display:table-caption;text-align:center',
center: 'text-align:center',
cite: 'font-style:italic',
dd: 'margin-left:40px',
mark: 'background-color:yellow',
pre: 'font-family:monospace;white-space:pre',
s: 'text-decoration:line-through',
small: 'display:inline;font-size:0.8em',
u: 'text-decoration:underline' // #endif
}
}
const { windowWidth } = uni.getSystemInfoSync()
const blankChar = makeMap(' ,\r,\n,\t,\f')
let idIndex = 0 // #ifdef H5 || APP-PLUS
config.ignoreTags.iframe = void 0
config.trustTags.iframe = true
config.ignoreTags.embed = void 0
config.trustTags.embed = true // #endif
// #ifdef APP-PLUS-NVUE
config.ignoreTags.source = void 0
config.ignoreTags.style = void 0 // #endif
/**
* @description 创建 map
* @param {String} str 逗号分隔
*/
function makeMap(str) {
const map = Object.create(null)
const list = str.split(',')
for (let i = list.length; i--;) {
map[list[i]] = true
}
return map
}
/**
* @description 解码 html 实体
* @param {String} str 要解码的字符串
* @param {Boolean} amp 要不要解码 &
* @returns {String} 解码后的字符串
*/
function decodeEntity(str, amp) {
let i = str.indexOf('&')
while (i != -1) {
const j = str.indexOf(';', i + 3)
let code = void 0
if (j == -1) break
if (str[i + 1] == '#') {
// { 形式的实体
code = parseInt((str[i + 2] == 'x' ? '0' : '') + str.substring(i + 2, j))
if (!isNaN(code)) str = str.substr(0, i) + String.fromCharCode(code) + str.substr(j + 1)
} else {
// 形式的实体
code = str.substring(i + 1, j)
if (config.entities[code] || code == 'amp' && amp) str = str.substr(0, i) + (config.entities[code] || '&') + str.substr(j + 1)
}
i = str.indexOf('&', i + 1)
}
return str
}
/**
* @description html 解析器
* @param {Object} vm 组件实例
*/
function parser(vm) {
this.options = vm || {}
this.tagStyle = Object.assign(config.tagStyle, this.options.tagStyle)
this.imgList = vm.imgList || []
this.plugins = vm.plugins || []
this.attrs = Object.create(null)
this.stack = []
this.nodes = []
}
/**
* @description 执行解析
* @param {String} content 要解析的文本
*/
parser.prototype.parse = function (content) {
// 插件处理
for (let i = this.plugins.length; i--;) {
if (this.plugins[i].onUpdate) content = this.plugins[i].onUpdate(content, config) || content
}
new lexer(this).parse(content) // 出栈未闭合的标签
while (this.stack.length) {
this.popNode()
}
return this.nodes
}
/**
* @description 将标签暴露出来（不被 rich-text 包含）
*/
parser.prototype.expose = function () {
// #ifndef APP-PLUS-NVUE
for (let i = this.stack.length; i--;) {
const item = this.stack[i]
if (item.name == 'a' || item.c) return
item.c = 1
} // #endif
}
/**
* @description 处理插件
* @param {Object} node 要处理的标签
* @returns {Boolean} 是否要移除此标签
*/
parser.prototype.hook = function (node) {
for (let i = this.plugins.length; i--;) {
if (this.plugins[i].onParse && this.plugins[i].onParse(node, this) == false) return false
}
return true
}
/**
* @description 将链接拼接上主域名
* @param {String} url 需要拼接的链接
* @returns {String} 拼接后的链接
*/
parser.prototype.getUrl = function (url) {
const { domain } = this.options
if (url[0] == '/') {
// // 开头的补充协议名
if (url[1] == '/') url = `${domain ? domain.split('://')[0] : 'http'}:${url}` // 否则补充整个域名
else if (domain) url = domain + url
} else if (domain && !url.includes('data:') && !url.includes('://')) url = `${domain}/${url}`
return url
}
/**
* @description 解析样式表
* @param {Object} node 标签
* @returns {Object}
*/
parser.prototype.parseStyle = function (node) {
const { attrs } = node
const list = (this.tagStyle[node.name] || '').split(';').concat((attrs.style || '').split(';'))
const styleObj = {}
let tmp = ''
if (attrs.id) {
// 暴露锚点
if (this.options.useAnchor) this.expose(); else if (node.name != 'img' && node.name != 'a' && node.name != 'video' && node.name != 'audio') attrs.id = void 0
} // 转换 width 和 height 属性
if (attrs.width) {
styleObj.width = parseFloat(attrs.width) + (attrs.width.includes('%') ? '%' : 'px')
attrs.width = void 0
}
if (attrs.height) {
styleObj.height = parseFloat(attrs.height) + (attrs.height.includes('%') ? '%' : 'px')
attrs.height = void 0
}
for (let i = 0, len = list.length; i < len; i++) {
const info = list[i].split(':')
if (info.length < 2) continue
const key = info.shift().trim().toLowerCase()
let value = info.join(':').trim() // 兼容性的 css 不压缩
if (value[0] == '-' && value.lastIndexOf('-') > 0 || value.includes('safe')) tmp += ';'.concat(key, ':').concat(value) // 重复的样式进行覆盖
else if (!styleObj[key] || value.includes('import') || !styleObj[key].includes('import')) {
// 填充链接
if (value.includes('url')) {
let j = value.indexOf('(') + 1
if (j) {
while (value[j] == '"' || value[j] == "'" || blankChar[value[j]]) {
j++
}
value = value.substr(0, j) + this.getUrl(value.substr(j))
}
} // 转换 rpx（rich-text 内部不支持 rpx）
else if (value.includes('rpx')) {
value = value.replace(/[0-9.]+\s*rpx/g, ($) => `${parseFloat($) * windowWidth / 750}px`)
}
styleObj[key] = value
}
}
node.attrs.style = tmp
return styleObj
}
/**
* @description 解析到标签名
* @param {String} name 标签名
* @private
*/
parser.prototype.onTagName = function (name) {
this.tagName = this.xml ? name : name.toLowerCase()
if (this.tagName == 'svg') this.xml = true // svg 标签内大小写敏感
}
/**
* @description 解析到属性名
* @param {String} name 属性名
* @private
*/
parser.prototype.onAttrName = function (name) {
name = this.xml ? name : name.toLowerCase()
if (name.substr(0, 5) == 'data-') {
// data-src 自动转为 src
if (name == 'data-src' && !this.attrs.src) this.attrName = 'src' // a 和 img 标签保留 data- 的属性，可以在 imgtap 和 linktap 事件中使用
else if (this.tagName == 'img' || this.tagName == 'a') this.attrName = name // 剩余的移除以减小大小
else this.attrName = void 0
} else {
this.attrName = name
this.attrs[name] = 'T' // boolean 型属性缺省设置
}
}
/**
* @description 解析到属性值
* @param {String} val 属性值
* @private
*/
parser.prototype.onAttrVal = function (val) {
const name = this.attrName || '' // 部分属性进行实体解码
if (name == 'style' || name == 'href') this.attrs[name] = decodeEntity(val, true) // 拼接主域名
else if (name.includes('src')) this.attrs[name] = this.getUrl(decodeEntity(val, true)); else if (name) this.attrs[name] = val
}
/**
* @description 解析到标签开始
* @param {Boolean} selfClose 是否有自闭合标识 />
* @private
*/
parser.prototype.onOpenTag = function (selfClose) {
// 拼装 node
const node = Object.create(null)
node.name = this.tagName
node.attrs = this.attrs
this.attrs = Object.create(null)
const { attrs } = node
const parent = this.stack[this.stack.length - 1]
const siblings = parent ? parent.children : this.nodes
const close = this.xml ? selfClose : config.voidTags[node.name] // 转换 embed 标签
if (node.name == 'embed') {
// #ifndef H5 || APP-PLUS
const src = attrs.src || '' // 按照后缀名和 type 将 embed 转为 video 或 audio
if (src.includes('.mp4') || src.includes('.3gp') || src.includes('.m3u8') || (attrs.type || '').includes('video')) node.name = 'video'; else if (src.includes('.mp3') || src.includes('.wav') || src.includes('.aac') || src.includes('.m4a') || (attrs.type || '').includes('audio')) node.name = 'audio'
if (attrs.autostart) attrs.autoplay = 'T'
attrs.controls = 'T' // #endif
// #ifdef H5 || APP-PLUS
this.expose() // #endif
} // #ifndef APP-PLUS-NVUE
// 处理音视频
if (node.name == 'video' || node.name == 'audio') {
// 设置 id 以便获取 context
if (node.name == 'video' && !attrs.id) attrs.id = `v${idIndex++}` // 没有设置 controls 也没有设置 autoplay 的自动设置 controls
if (!attrs.controls && !attrs.autoplay) attrs.controls = 'T' // 用数组存储所有可用的 source
node.src = []
if (attrs.src) {
node.src.push(attrs.src)
attrs.src = void 0
}
this.expose()
} // #endif
// 处理自闭合标签
if (close) {
if (!this.hook(node) || config.ignoreTags[node.name]) {
// 通过 base 标签设置主域名
if (node.name == 'base' && !this.options.domain) this.options.domain = attrs.href // #ifndef APP-PLUS-NVUE
// 设置 source 标签（仅父节点为 video 或 audio 时有效）
else if (node.name == 'source' && parent && (parent.name == 'video' || parent.name == 'audio') && attrs.src) parent.src.push(attrs.src) // #endif
return
} // 解析 style
const styleObj = this.parseStyle(node) // 处理图片
if (node.name == 'img') {
if (attrs.src) {
// 标记 webp
if (attrs.src.includes('webp')) node.webp = 'T' // data url 图片如果没有设置 original-src 默认为不可预览的小图片
if (attrs.src.includes('data:') && !attrs['original-src']) attrs.ignore = 'T'
if (!attrs.ignore || node.webp || attrs.src.includes('cloud://')) {
for (let i = this.stack.length; i--;) {
const item = this.stack[i]
if (item.name == 'a') {
node.a = item.attrs
break
} // #ifndef H5 || APP-PLUS
const style = item.attrs.style || ''
if (style.includes('flex:') && !style.includes('flex:0') && !style.includes('flex: 0') && (!styleObj.width || !styleObj.width.includes('%'))) {
styleObj.width = '100% !important'
styleObj.height = ''
for (let j = i + 1; j < this.stack.length; j++) {
this.stack[j].attrs.style = (this.stack[j].attrs.style || '').replace('inline-', '')
}
} else if (style.includes('flex') && styleObj.width == '100%') {
for (let _j = i + 1; _j < this.stack.length; _j++) {
const _style = this.stack[_j].attrs.style || ''
if (!_style.includes(';width') && !_style.includes(' width') && _style.indexOf('width') != 0) {
styleObj.width = ''
break
}
}
} else if (style.includes('inline-block')) {
if (styleObj.width && styleObj.width[styleObj.width.length - 1] == '%') {
item.attrs.style += `;max-width:${styleObj.width}`
styleObj.width = ''
} else item.attrs.style += ';max-width:100%'
} // #endif
item.c = 1
}
attrs.i = this.imgList.length.toString()
let _src = attrs['original-src'] || attrs.src // #ifndef H5 || MP-ALIPAY || APP-PLUS || MP-360
if (this.imgList.includes(_src)) {
// 如果有重复的链接则对域名进行随机大小写变换避免预览时错位
let _i = _src.indexOf('://')
if (_i != -1) {
_i += 3
let newSrc = _src.substr(0, _i)
for (; _i < _src.length; _i++) {
if (_src[_i] == '/') break
newSrc += Math.random() > 0.5 ? _src[_i].toUpperCase() : _src[_i]
}
newSrc += _src.substr(_i)
_src = newSrc
}
} // #endif
this.imgList.push(_src) // #ifdef H5 || APP-PLUS
if (this.options.lazyLoad) {
attrs['data-src'] = attrs.src
attrs.src = void 0
} // #endif
}
}
if (styleObj.display == 'inline') styleObj.display = '' // #ifndef APP-PLUS-NVUE
if (attrs.ignore) {
styleObj['max-width'] = styleObj['max-width'] || '100%'
attrs.style += ';-webkit-touch-callout:none'
} // #endif
// 设置的宽度超出屏幕，为避免变形，高度转为自动
if (parseInt(styleObj.width) > windowWidth) styleObj.height = void 0 // 记录是否设置了宽高
if (styleObj.width) {
if (styleObj.width.includes('auto')) styleObj.width = ''; else {
node.w = 'T'
if (styleObj.height && !styleObj.height.includes('auto')) node.h = 'T'
}
}
} else if (node.name == 'svg') {
siblings.push(node)
this.stack.push(node)
this.popNode()
return
}
for (const key in styleObj) {
if (styleObj[key]) attrs.style += ';'.concat(key, ':').concat(styleObj[key].replace(' !important', ''))
}
attrs.style = attrs.style.substr(1) || void 0
} else {
if (node.name == 'pre' || (attrs.style || '').includes('white-space') && attrs.style.includes('pre')) this.pre = node.pre = true
node.children = []
this.stack.push(node)
} // 加入节点树
siblings.push(node)
}
/**
* @description 解析到标签结束
* @param {String} name 标签名
* @private
*/
parser.prototype.onCloseTag = function (name) {
// 依次出栈到匹配为止
name = this.xml ? name : name.toLowerCase()
let i
for (i = this.stack.length; i--;) {
if (this.stack[i].name == name) break
}
if (i != -1) {
while (this.stack.length > i) {
this.popNode()
}
} else if (name == 'p' || name == 'br') {
const siblings = this.stack.length ? this.stack[this.stack.length - 1].children : this.nodes
siblings.push({
name,
attrs: {}
})
}
}
/**
* @description 处理标签出栈
* @private
*/
parser.prototype.popNode = function () {
const node = this.stack.pop()
let { attrs } = node
const { children } = node
const parent = this.stack[this.stack.length - 1]
const siblings = parent ? parent.children : this.nodes
if (!this.hook(node) || config.ignoreTags[node.name]) {
// 获取标题
if (node.name == 'title' && children.length && children[0].type == 'text' && this.options.setTitle) {
uni.setNavigationBarTitle({
title: children[0].text
})
}
siblings.pop()
return
}
if (node.pre) {
// 是否合并空白符标识
node.pre = this.pre = void 0
for (let i = this.stack.length; i--;) {
if (this.stack[i].pre) this.pre = true
}
}
const styleObj = {} // 转换 svg
if (node.name == 'svg') {
// #ifndef APP-PLUS-NVUE
let src = ''
const { style } = attrs
attrs.style = ''
attrs.xmlns = 'http://www.w3.org/2000/svg';
(function traversal(node) {
src += `<${node.name}`
for (let item in node.attrs) {
const val = node.attrs[item]
if (val) {
if (item == 'viewbox') item = 'viewBox'
src += ' '.concat(item, '="').concat(val, '"')
}
}
if (!node.children) src += '/>'; else {
src += '>'
for (let _i2 = 0; _i2 < node.children.length; _i2++) {
traversal(node.children[_i2])
}
src += `</${node.name}>`
}
}(node))
node.name = 'img'
node.attrs = {
src: `data:image/svg+xml;utf8,${src.replace(/#/g, '%23')}`,
style,
ignore: 'T'
}
node.children = void 0 // #endif
this.xml = false
return
} // #ifndef APP-PLUS-NVUE
// 转换 align 属性
if (attrs.align) {
if (node.name == 'table') {
if (attrs.align == 'center') styleObj['margin-inline-start'] = styleObj['margin-inline-end'] = 'auto'; else styleObj.float = attrs.align
} else styleObj['text-align'] = attrs.align
attrs.align = void 0
} // 转换 font 标签的属性
if (node.name == 'font') {
if (attrs.color) {
styleObj.color = attrs.color
attrs.color = void 0
}
if (attrs.face) {
styleObj['font-family'] = attrs.face
attrs.face = void 0
}
if (attrs.size) {
let size = parseInt(attrs.size)
if (!isNaN(size)) {
if (size < 1) size = 1; else if (size > 7) size = 7
styleObj['font-size'] = ['xx-small', 'x-small', 'small', 'medium', 'large', 'x-large', 'xx-large'][size - 1]
}
attrs.size = void 0
}
} // #endif
// 一些编辑器的自带 class
if ((attrs.class || '').includes('align-center')) styleObj['text-align'] = 'center'
Object.assign(styleObj, this.parseStyle(node))
if (parseInt(styleObj.width) > windowWidth) {
styleObj['max-width'] = '100%'
styleObj['box-sizing'] = 'border-box'
} // #ifndef APP-PLUS-NVUE
if (config.blockTags[node.name]) node.name = 'div' // 未知标签转为 span，避免无法显示
else if (!config.trustTags[node.name] && !this.xml) node.name = 'span'
if (node.name == 'a' || node.name == 'ad' // #ifdef H5 || APP-PLUS
|| node.name == 'iframe' // #endif
) this.expose() // #ifdef APP-PLUS
else if (node.name == 'video') {
let str = '<video style="width:100%;height:100%"' // 空白图占位
if (!attrs.poster && !attrs.autoplay) attrs.poster = "data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg'/>"
for (const item in attrs) {
if (attrs[item]) str += ` ${item}="${attrs[item]}"`
}
if (this.options.pauseVideo) str += ' onplay="for(var e=document.getElementsByTagName(\'video\'),t=0;t<e.length;t++)e[t]!=this&&e[t].pause()"'
str += '>'
for (let _i3 = 0; _i3 < node.src.length; _i3++) {
str += `<source src="${node.src[_i3]}">`
}
str += '</video>'
node.html = str
} // #endif
// 列表处理
else if ((node.name == 'ul' || node.name == 'ol') && node.c) {
const types = {
a: 'lower-alpha',
A: 'upper-alpha',
i: 'lower-roman',
I: 'upper-roman'
}
if (types[attrs.type]) {
attrs.style += `;list-style-type:${types[attrs.type]}`
attrs.type = void 0
}
for (let _i4 = children.length; _i4--;) {
if (children[_i4].name == 'li') children[_i4].c = 1
}
} // 表格处理
else if (node.name == 'table') {
// cellpadding、cellspacing、border 这几个常用表格属性需要通过转换实现
let padding = parseFloat(attrs.cellpadding)
let spacing = parseFloat(attrs.cellspacing)
const border = parseFloat(attrs.border)
if (node.c) {
// padding 和 spacing 默认 2
if (isNaN(padding)) padding = 2
if (isNaN(spacing)) spacing = 2
}
if (border) attrs.style += `;border:${border}px solid gray`
if (node.flag && node.c) {
// 有 colspan 或 rowspan 且含有链接的表格通过 grid 布局实现
styleObj.display = 'grid'
if (spacing) {
styleObj['grid-gap'] = `${spacing}px`
styleObj.padding = `${spacing}px`
} // 无间隔的情况下避免边框重叠
else if (border) attrs.style += ';border-left:0;border-top:0'
const width = []
// 表格的列宽
const trList = []
// tr 列表
const cells = []
// 保存新的单元格
const map = {}; // 被合并单元格占用的格子
(function traversal(nodes) {
for (let _i5 = 0; _i5 < nodes.length; _i5++) {
if (nodes[_i5].name == 'tr') trList.push(nodes[_i5]); else traversal(nodes[_i5].children || [])
}
}(children))
for (let row = 1; row <= trList.length; row++) {
let col = 1
for (let j = 0; j < trList[row - 1].children.length; j++, col++) {
const td = trList[row - 1].children[j]
if (td.name == 'td' || td.name == 'th') {
// 这个格子被上面的单元格占用，则列号++
while (map[`${row}.${col}`]) {
col++
}
let _style2 = td.attrs.style || ''
const start = _style2.indexOf('width') ? _style2.indexOf(';width') : 0 // 提取出 td 的宽度
if (start != -1) {
let end = _style2.indexOf(';', start + 6)
if (end == -1) end = _style2.length
if (!td.attrs.colspan) width[col] = _style2.substring(start ? start + 7 : 6, end)
_style2 = _style2.substr(0, start) + _style2.substr(end)
}
_style2 += (border ? ';border:'.concat(border, 'px solid gray') + (spacing ? '' : ';border-right:0;border-bottom:0') : '') + (padding ? ';padding:'.concat(padding, 'px') : '') // 处理列合并
if (td.attrs.colspan) {
_style2 += ';grid-column-start:'.concat(col, ';grid-column-end:').concat(col + parseInt(td.attrs.colspan))
if (!td.attrs.rowspan) _style2 += ';grid-row-start:'.concat(row, ';grid-row-end:').concat(row + 1)
col += parseInt(td.attrs.colspan) - 1
} // 处理行合并
if (td.attrs.rowspan) {
_style2 += ';grid-row-start:'.concat(row, ';grid-row-end:').concat(row + parseInt(td.attrs.rowspan))
if (!td.attrs.colspan) _style2 += ';grid-column-start:'.concat(col, ';grid-column-end:').concat(col + 1) // 记录下方单元格被占用
for (let k = 1; k < td.attrs.rowspan; k++) {
map[`${row + k}.${col}`] = 1
}
}
if (_style2) td.attrs.style = _style2
cells.push(td)
}
}
if (row == 1) {
let temp = ''
for (let _i6 = 1; _i6 < col; _i6++) {
temp += `${width[_i6] ? width[_i6] : 'auto'} `
}
styleObj['grid-template-columns'] = temp
}
}
node.children = cells
} else {
// 没有使用合并单元格的表格通过 table 布局实现
if (node.c) styleObj.display = 'table'
if (!isNaN(spacing)) styleObj['border-spacing'] = `${spacing}px`
if (border || padding) {
// 遍历
(function traversal(nodes) {
for (let _i7 = 0; _i7 < nodes.length; _i7++) {
const _td = nodes[_i7]
if (_td.name == 'th' || _td.name == 'td') {
if (border) _td.attrs.style = 'border:'.concat(border, 'px solid gray;').concat(_td.attrs.style || '')
if (padding) _td.attrs.style = 'padding:'.concat(padding, 'px;').concat(_td.attrs.style || '')
} else if (_td.children) traversal(_td.children)
}
}(children))
}
} // 给表格添加一个单独的横向滚动层
if (this.options.scrollTable && !(attrs.style || '').includes('inline')) {
const table = { ...node }
node.name = 'div'
node.attrs = {
style: 'overflow:auto'
}
node.children = [table]
attrs = table.attrs
}
} else if ((node.name == 'td' || node.name == 'th') && (attrs.colspan || attrs.rowspan)) {
for (let _i8 = this.stack.length; _i8--;) {
if (this.stack[_i8].name == 'table') {
this.stack[_i8].flag = 1 // 指示含有合并单元格
break
}
}
} // 转换 ruby
else if (node.name == 'ruby') {
node.name = 'span'
for (let _i9 = 0; _i9 < children.length - 1; _i9++) {
if (children[_i9].type == 'text' && children[_i9 + 1].name == 'rt') {
children[_i9] = {
name: 'div',
attrs: {
style: 'display:inline-block'
},
children: [{
name: 'div',
attrs: {
style: 'font-size:50%;text-align:start'
},
children: children[_i9 + 1].children
}, children[_i9]]
}
children.splice(_i9 + 1, 1)
}
}
} else if (node.c) {
node.c = 2
for (let _i10 = node.children.length; _i10--;) {
if (!node.children[_i10].c || node.children[_i10].name == 'table') node.c = 1
}
}
if ((styleObj.display || '').includes('flex') && !node.c) {
for (let _i11 = children.length; _i11--;) {
const _item = children[_i11]
if (_item.f) {
_item.attrs.style = (_item.attrs.style || '') + _item.f
_item.f = void 0
}
}
} // flex 布局时部分样式需要提取到 rich-text 外层
const flex = parent && (parent.attrs.style || '').includes('flex') // #ifdef MP-WEIXIN
// 检查基础库版本 virtualHost 是否可用
&& !(node.c && wx.getNFCAdapter) // #endif
// #ifndef MP-WEIXIN || MP-QQ || MP-BAIDU || MP-TOUTIAO
&& !node.c // #endif
if (flex) node.f = ';max-width:100%' // #endif
for (const key in styleObj) {
if (styleObj[key]) {
const val = ';'.concat(key, ':').concat(styleObj[key].replace(' !important', '')) // #ifndef APP-PLUS-NVUE
if (flex && (key.includes('flex') && key != 'flex-direction' || key == 'align-self' || styleObj[key][0] == '-' || key == 'width' && val.includes('%'))) {
node.f += val
if (key == 'width') attrs.style += ';width:100%'
} else // #endif
{ attrs.style += val }
}
}
attrs.style = attrs.style.substr(1) || void 0
}
/**
* @description 解析到文本
* @param {String} text 文本内容
*/
parser.prototype.onText = function (text) {
if (!this.pre) {
// 合并空白符
let trim = ''
let flag
for (let i = 0, len = text.length; i < len; i++) {
if (!blankChar[text[i]]) trim += text[i]; else {
if (trim[trim.length - 1] != ' ') trim += ' '
if (text[i] == '\n' && !flag) flag = true
}
} // 去除含有换行符的空串
if (trim == ' ' && flag) return
text = trim
}
const node = Object.create(null)
node.type = 'text'
node.text = decodeEntity(text)
if (this.hook(node)) {
const siblings = this.stack.length ? this.stack[this.stack.length - 1].children : this.nodes
siblings.push(node)
}
}
/**
* @description html 词法分析器
* @param {Object} handler 高层处理器
*/
function lexer(handler) {
this.handler = handler
}
/**
* @description 执行解析
* @param {String} content 要解析的文本
*/
lexer.prototype.parse = function (content) {
this.content = content || ''
this.i = 0 // 标记解析位置
this.start = 0 // 标记一个单词的开始位置
this.state = this.text // 当前状态
for (let len = this.content.length; this.i != -1 && this.i < len;) {
this.state()
}
}
/**
* @description 检查标签是否闭合
* @param {String} method 如果闭合要进行的操作
* @returns {Boolean} 是否闭合
* @private
*/
lexer.prototype.checkClose = function (method) {
const selfClose = this.content[this.i] == '/'
if (this.content[this.i] == '>' || selfClose && this.content[this.i + 1] == '>') {
if (method) this.handler[method](this.content.substring(this.start, this.i))
this.i += selfClose ? 2 : 1
this.start = this.i
this.handler.onOpenTag(selfClose)
if (this.handler.tagName == 'script') {
this.i = this.content.indexOf('</', this.i)
if (this.i != -1) {
this.i += 2
this.start = this.i
}
this.state = this.endTag
} else this.state = this.text
return true
}
return false
}
/**
* @description 文本状态
* @private
*/
lexer.prototype.text = function () {
this.i = this.content.indexOf('<', this.i) // 查找最近的标签
if (this.i == -1) {
// 没有标签了
if (this.start < this.content.length) this.handler.onText(this.content.substring(this.start, this.content.length))
return
}
const c = this.content[this.i + 1]
if (c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z') {
// 标签开头
if (this.start != this.i) this.handler.onText(this.content.substring(this.start, this.i))
this.start = ++this.i
this.state = this.tagName
} else if (c == '/' || c == '!' || c == '?') {
if (this.start != this.i) this.handler.onText(this.content.substring(this.start, this.i))
const next = this.content[this.i + 2]
if (c == '/' && (next >= 'a' && next <= 'z' || next >= 'A' && next <= 'Z')) {
// 标签结尾
this.i += 2
this.start = this.i
return this.state = this.endTag
} // 处理注释
let end = '-->'
if (c != '!' || this.content[this.i + 2] != '-' || this.content[this.i + 3] != '-') end = '>'
this.i = this.content.indexOf(end, this.i)
if (this.i != -1) {
this.i += end.length
this.start = this.i
}
} else this.i++
}
/**
* @description 标签名状态
* @private
*/
lexer.prototype.tagName = function () {
if (blankChar[this.content[this.i]]) {
// 解析到标签名
this.handler.onTagName(this.content.substring(this.start, this.i))
while (blankChar[this.content[++this.i]]) {
}
if (this.i < this.content.length && !this.checkClose()) {
this.start = this.i
this.state = this.attrName
}
} else if (!this.checkClose('onTagName')) this.i++
}
/**
* @description 属性名状态
* @private
*/
lexer.prototype.attrName = function () {
let c = this.content[this.i]
if (blankChar[c] || c == '=') {
// 解析到属性名
this.handler.onAttrName(this.content.substring(this.start, this.i))
let needVal = c == '='
const len = this.content.length
while (++this.i < len) {
c = this.content[this.i]
if (!blankChar[c]) {
if (this.checkClose()) return
if (needVal) {
// 等号后遇到第一个非空字符
this.start = this.i
return this.state = this.attrVal
}
if (this.content[this.i] == '=') needVal = true; else {
this.start = this.i
return this.state = this.attrName
}
}
}
} else if (!this.checkClose('onAttrName')) this.i++
}
/**
* @description 属性值状态
* @private
*/
lexer.prototype.attrVal = function () {
const c = this.content[this.i]
const len = this.content.length // 有冒号的属性
if (c == '"' || c == "'") {
this.start = ++this.i
this.i = this.content.indexOf(c, this.i)
if (this.i == -1) return
this.handler.onAttrVal(this.content.substring(this.start, this.i))
} // 没有冒号的属性
else {
for (; this.i < len; this.i++) {
if (blankChar[this.content[this.i]]) {
this.handler.onAttrVal(this.content.substring(this.start, this.i))
break
} else if (this.checkClose('onAttrVal')) return
}
}
while (blankChar[this.content[++this.i]]) {
}
if (this.i < len && !this.checkClose()) {
this.start = this.i
this.state = this.attrName
}
}
/**
* @description 结束标签状态
* @returns {String} 结束的标签名
* @private
*/
lexer.prototype.endTag = function () {
const c = this.content[this.i]
if (blankChar[c] || c == '>' || c == '/') {
this.handler.onCloseTag(this.content.substring(this.start, this.i))
if (c != '>') {
this.i = this.content.indexOf('>', this.i)
if (this.i == -1) return
}
this.start = ++this.i
this.state = this.text
} else this.i++
}
module.exports = parser