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1075 lines
36 KiB
1075 lines
36 KiB
'use strict' |
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/** |
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* @fileoverview html 解析器 |
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*/ |
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// 配置 |
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const config = { |
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// 信任的标签（保持标签名不变） |
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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'), |
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// 块级标签（转为 div，其他的非信任标签转为 span） |
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blockTags: makeMap('address,article,aside,body,caption,center,cite,footer,header,html,nav,pre,section'), |
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// 要移除的标签 |
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ignoreTags: makeMap('area,base,canvas,embed,frame,head,iframe,input,link,map,meta,param,rp,script,source,style,textarea,title,track,wbr'), |
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// 自闭合的标签 |
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voidTags: makeMap('area,base,br,col,circle,ellipse,embed,frame,hr,img,input,line,link,meta,param,path,polygon,rect,source,track,use,wbr'), |
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// html 实体 |
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entities: { |
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lt: '<', |
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gt: '>', |
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quot: '"', |
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apos: "'", |
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ensp: '\u2002', |
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emsp: '\u2003', |
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nbsp: '\xA0', |
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semi: ';', |
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ndash: '–', |
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mdash: '—', |
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middot: '·', |
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lsquo: '‘', |
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rsquo: '’', |
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ldquo: '“', |
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rdquo: '”', |
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bull: '•', |
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hellip: '…' |
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}, |
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// 默认的标签样式 |
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tagStyle: { |
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// #ifndef APP-PLUS-NVUE |
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address: 'font-style:italic', |
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big: 'display:inline;font-size:1.2em', |
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caption: 'display:table-caption;text-align:center', |
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center: 'text-align:center', |
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cite: 'font-style:italic', |
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dd: 'margin-left:40px', |
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mark: 'background-color:yellow', |
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pre: 'font-family:monospace;white-space:pre', |
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s: 'text-decoration:line-through', |
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small: 'display:inline;font-size:0.8em', |
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u: 'text-decoration:underline' // #endif |
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} |
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} |
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const { windowWidth } = uni.getSystemInfoSync() |
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const blankChar = makeMap(' ,\r,\n,\t,\f') |
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let idIndex = 0 // #ifdef H5 || APP-PLUS |
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config.ignoreTags.iframe = void 0 |
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config.trustTags.iframe = true |
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config.ignoreTags.embed = void 0 |
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config.trustTags.embed = true // #endif |
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// #ifdef APP-PLUS-NVUE |
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config.ignoreTags.source = void 0 |
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config.ignoreTags.style = void 0 // #endif |
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/** |
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* @description 创建 map |
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* @param {String} str 逗号分隔 |
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*/ |
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function makeMap(str) { |
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const map = Object.create(null) |
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const list = str.split(',') |
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for (let i = list.length; i--;) { |
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map[list[i]] = true |
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} |
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return map |
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} |
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/** |
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* @description 解码 html 实体 |
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* @param {String} str 要解码的字符串 |
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* @param {Boolean} amp 要不要解码 & |
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* @returns {String} 解码后的字符串 |
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*/ |
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function decodeEntity(str, amp) { |
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let i = str.indexOf('&') |
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while (i != -1) { |
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const j = str.indexOf(';', i + 3) |
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let code = void 0 |
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if (j == -1) break |
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if (str[i + 1] == '#') { |
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// { 形式的实体 |
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code = parseInt((str[i + 2] == 'x' ? '0' : '') + str.substring(i + 2, j)) |
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if (!isNaN(code)) str = str.substr(0, i) + String.fromCharCode(code) + str.substr(j + 1) |
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} else { |
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// 形式的实体 |
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code = str.substring(i + 1, j) |
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if (config.entities[code] || code == 'amp' && amp) str = str.substr(0, i) + (config.entities[code] || '&') + str.substr(j + 1) |
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} |
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i = str.indexOf('&', i + 1) |
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} |
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return str |
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} |
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/** |
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* @description html 解析器 |
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* @param {Object} vm 组件实例 |
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*/ |
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function parser(vm) { |
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this.options = vm || {} |
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this.tagStyle = Object.assign(config.tagStyle, this.options.tagStyle) |
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this.imgList = vm.imgList || [] |
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this.plugins = vm.plugins || [] |
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this.attrs = Object.create(null) |
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this.stack = [] |
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this.nodes = [] |
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} |
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/** |
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* @description 执行解析 |
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* @param {String} content 要解析的文本 |
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*/ |
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parser.prototype.parse = function (content) { |
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// 插件处理 |
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for (let i = this.plugins.length; i--;) { |
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if (this.plugins[i].onUpdate) content = this.plugins[i].onUpdate(content, config) || content |
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} |
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new lexer(this).parse(content) // 出栈未闭合的标签 |
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while (this.stack.length) { |
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this.popNode() |
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} |
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return this.nodes |
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} |
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/** |
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* @description 将标签暴露出来（不被 rich-text 包含） |
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*/ |
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parser.prototype.expose = function () { |
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// #ifndef APP-PLUS-NVUE |
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for (let i = this.stack.length; i--;) { |
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const item = this.stack[i] |
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if (item.name == 'a' || item.c) return |
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item.c = 1 |
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} // #endif |
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} |
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/** |
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* @description 处理插件 |
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* @param {Object} node 要处理的标签 |
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* @returns {Boolean} 是否要移除此标签 |
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*/ |
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parser.prototype.hook = function (node) { |
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for (let i = this.plugins.length; i--;) { |
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if (this.plugins[i].onParse && this.plugins[i].onParse(node, this) == false) return false |
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} |
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return true |
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} |
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/** |
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* @description 将链接拼接上主域名 |
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* @param {String} url 需要拼接的链接 |
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* @returns {String} 拼接后的链接 |
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*/ |
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parser.prototype.getUrl = function (url) { |
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const { domain } = this.options |
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if (url[0] == '/') { |
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// // 开头的补充协议名 |
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if (url[1] == '/') url = `${domain ? domain.split('://')[0] : 'http'}:${url}` // 否则补充整个域名 |
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else if (domain) url = domain + url |
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} else if (domain && !url.includes('data:') && !url.includes('://')) url = `${domain}/${url}` |
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return url |
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} |
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/** |
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* @description 解析样式表 |
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* @param {Object} node 标签 |
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* @returns {Object} |
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*/ |
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parser.prototype.parseStyle = function (node) { |
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const { attrs } = node |
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const list = (this.tagStyle[node.name] || '').split(';').concat((attrs.style || '').split(';')) |
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const styleObj = {} |
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let tmp = '' |
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if (attrs.id) { |
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// 暴露锚点 |
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if (this.options.useAnchor) this.expose(); else if (node.name != 'img' && node.name != 'a' && node.name != 'video' && node.name != 'audio') attrs.id = void 0 |
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} // 转换 width 和 height 属性 |
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if (attrs.width) { |
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styleObj.width = parseFloat(attrs.width) + (attrs.width.includes('%') ? '%' : 'px') |
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attrs.width = void 0 |
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} |
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if (attrs.height) { |
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styleObj.height = parseFloat(attrs.height) + (attrs.height.includes('%') ? '%' : 'px') |
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attrs.height = void 0 |
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} |
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for (let i = 0, len = list.length; i < len; i++) { |
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const info = list[i].split(':') |
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if (info.length < 2) continue |
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const key = info.shift().trim().toLowerCase() |
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let value = info.join(':').trim() // 兼容性的 css 不压缩 |
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if (value[0] == '-' && value.lastIndexOf('-') > 0 || value.includes('safe')) tmp += ';'.concat(key, ':').concat(value) // 重复的样式进行覆盖 |
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else if (!styleObj[key] || value.includes('import') || !styleObj[key].includes('import')) { |
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// 填充链接 |
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if (value.includes('url')) { |
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let j = value.indexOf('(') + 1 |
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if (j) { |
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while (value[j] == '"' || value[j] == "'" || blankChar[value[j]]) { |
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j++ |
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} |
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value = value.substr(0, j) + this.getUrl(value.substr(j)) |
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} |
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} // 转换 rpx（rich-text 内部不支持 rpx） |
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else if (value.includes('rpx')) { |
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value = value.replace(/[0-9.]+\s*rpx/g, ($) => `${parseFloat($) * windowWidth / 750}px`) |
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} |
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styleObj[key] = value |
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} |
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} |
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node.attrs.style = tmp |
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return styleObj |
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} |
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/** |
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* @description 解析到标签名 |
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* @param {String} name 标签名 |
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* @private |
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*/ |
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parser.prototype.onTagName = function (name) { |
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this.tagName = this.xml ? name : name.toLowerCase() |
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if (this.tagName == 'svg') this.xml = true // svg 标签内大小写敏感 |
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} |
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/** |
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* @description 解析到属性名 |
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* @param {String} name 属性名 |
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* @private |
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*/ |
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parser.prototype.onAttrName = function (name) { |
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name = this.xml ? name : name.toLowerCase() |
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if (name.substr(0, 5) == 'data-') { |
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// data-src 自动转为 src |
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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 |
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else if (this.tagName == 'img' || this.tagName == 'a') this.attrName = name // 剩余的移除以减小大小 |
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else this.attrName = void 0 |
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} else { |
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this.attrName = name |
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this.attrs[name] = 'T' // boolean 型属性缺省设置 |
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} |
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} |
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/** |
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* @description 解析到属性值 |
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* @param {String} val 属性值 |
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* @private |
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*/ |
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parser.prototype.onAttrVal = function (val) { |
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const name = this.attrName || '' // 部分属性进行实体解码 |
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if (name == 'style' || name == 'href') this.attrs[name] = decodeEntity(val, true) // 拼接主域名 |
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else if (name.includes('src')) this.attrs[name] = this.getUrl(decodeEntity(val, true)); else if (name) this.attrs[name] = val |
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} |
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/** |
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* @description 解析到标签开始 |
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* @param {Boolean} selfClose 是否有自闭合标识 /> |
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* @private |
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*/ |
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parser.prototype.onOpenTag = function (selfClose) { |
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// 拼装 node |
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const node = Object.create(null) |
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node.name = this.tagName |
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node.attrs = this.attrs |
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this.attrs = Object.create(null) |
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const { attrs } = node |
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const parent = this.stack[this.stack.length - 1] |
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const siblings = parent ? parent.children : this.nodes |
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const close = this.xml ? selfClose : config.voidTags[node.name] // 转换 embed 标签 |
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if (node.name == 'embed') { |
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// #ifndef H5 || APP-PLUS |
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const src = attrs.src || '' // 按照后缀名和 type 将 embed 转为 video 或 audio |
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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' |
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if (attrs.autostart) attrs.autoplay = 'T' |
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attrs.controls = 'T' // #endif |
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// #ifdef H5 || APP-PLUS |
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this.expose() // #endif |
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} // #ifndef APP-PLUS-NVUE |
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// 处理音视频 |
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if (node.name == 'video' || node.name == 'audio') { |
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// 设置 id 以便获取 context |
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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 |
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if (!attrs.controls && !attrs.autoplay) attrs.controls = 'T' // 用数组存储所有可用的 source |
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node.src = [] |
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if (attrs.src) { |
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node.src.push(attrs.src) |
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attrs.src = void 0 |
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} |
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this.expose() |
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} // #endif |
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// 处理自闭合标签 |
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if (close) { |
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if (!this.hook(node) || config.ignoreTags[node.name]) { |
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// 通过 base 标签设置主域名 |
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if (node.name == 'base' && !this.options.domain) this.options.domain = attrs.href // #ifndef APP-PLUS-NVUE |
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// 设置 source 标签（仅父节点为 video 或 audio 时有效） |
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else if (node.name == 'source' && parent && (parent.name == 'video' || parent.name == 'audio') && attrs.src) parent.src.push(attrs.src) // #endif |
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return |
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} // 解析 style |
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const styleObj = this.parseStyle(node) // 处理图片 |
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if (node.name == 'img') { |
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if (attrs.src) { |
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// 标记 webp |
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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 |
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if (attrs.src.includes('data:') && !attrs['original-src']) attrs.ignore = 'T' |
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if (!attrs.ignore || node.webp || attrs.src.includes('cloud://')) { |
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for (let i = this.stack.length; i--;) { |
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const item = this.stack[i] |
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if (item.name == 'a') { |
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node.a = item.attrs |
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break |
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} // #ifndef H5 || APP-PLUS |
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const style = item.attrs.style || '' |
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if (style.includes('flex:') && !style.includes('flex:0') && !style.includes('flex: 0') && (!styleObj.width || !styleObj.width.includes('%'))) { |
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styleObj.width = '100% !important' |
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styleObj.height = '' |
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for (let j = i + 1; j < this.stack.length; j++) { |
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this.stack[j].attrs.style = (this.stack[j].attrs.style || '').replace('inline-', '') |
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} |
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} else if (style.includes('flex') && styleObj.width == '100%') { |
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for (let _j = i + 1; _j < this.stack.length; _j++) { |
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const _style = this.stack[_j].attrs.style || '' |
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if (!_style.includes(';width') && !_style.includes(' width') && _style.indexOf('width') != 0) { |
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styleObj.width = '' |
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break |
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} |
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} |
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} else if (style.includes('inline-block')) { |
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if (styleObj.width && styleObj.width[styleObj.width.length - 1] == '%') { |
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item.attrs.style += `;max-width:${styleObj.width}` |
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styleObj.width = '' |
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} else item.attrs.style += ';max-width:100%' |
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} // #endif |
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item.c = 1 |
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} |
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attrs.i = this.imgList.length.toString() |
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let _src = attrs['original-src'] || attrs.src // #ifndef H5 || MP-ALIPAY || APP-PLUS || MP-360 |
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if (this.imgList.includes(_src)) { |
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// 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 |
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let _i = _src.indexOf('://') |
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if (_i != -1) { |
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_i += 3 |
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let newSrc = _src.substr(0, _i) |
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for (; _i < _src.length; _i++) { |
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if (_src[_i] == '/') break |
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newSrc += Math.random() > 0.5 ? _src[_i].toUpperCase() : _src[_i] |
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} |
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newSrc += _src.substr(_i) |
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_src = newSrc |
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} |
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} // #endif |
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this.imgList.push(_src) // #ifdef H5 || APP-PLUS |
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if (this.options.lazyLoad) { |
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attrs['data-src'] = attrs.src |
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attrs.src = void 0 |
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} // #endif |
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} |
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} |
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if (styleObj.display == 'inline') styleObj.display = '' // #ifndef APP-PLUS-NVUE |
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if (attrs.ignore) { |
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styleObj['max-width'] = styleObj['max-width'] || '100%' |
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attrs.style += ';-webkit-touch-callout:none' |
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} // #endif |
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// 设置的宽度超出屏幕，为避免变形，高度转为自动 |
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if (parseInt(styleObj.width) > windowWidth) styleObj.height = void 0 // 记录是否设置了宽高 |
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if (styleObj.width) { |
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if (styleObj.width.includes('auto')) styleObj.width = ''; else { |
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node.w = 'T' |
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if (styleObj.height && !styleObj.height.includes('auto')) node.h = 'T' |
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} |
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} |
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} else if (node.name == 'svg') { |
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siblings.push(node) |
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this.stack.push(node) |
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this.popNode() |
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return |
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} |
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for (const key in styleObj) { |
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if (styleObj[key]) attrs.style += ';'.concat(key, ':').concat(styleObj[key].replace(' !important', '')) |
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} |
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attrs.style = attrs.style.substr(1) || void 0 |
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} else { |
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if (node.name == 'pre' || (attrs.style || '').includes('white-space') && attrs.style.includes('pre')) this.pre = node.pre = true |
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node.children = [] |
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this.stack.push(node) |
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} // 加入节点树 |
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siblings.push(node) |
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} |
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/** |
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* @description 解析到标签结束 |
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* @param {String} name 标签名 |
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* @private |
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*/ |
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parser.prototype.onCloseTag = function (name) { |
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// 依次出栈到匹配为止 |
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name = this.xml ? name : name.toLowerCase() |
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let i |
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for (i = this.stack.length; i--;) { |
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if (this.stack[i].name == name) break |
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} |
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if (i != -1) { |
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while (this.stack.length > i) { |
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this.popNode() |
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} |
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} else if (name == 'p' || name == 'br') { |
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const siblings = this.stack.length ? this.stack[this.stack.length - 1].children : this.nodes |
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siblings.push({ |
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name, |
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attrs: {} |
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}) |
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} |
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} |
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/** |
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* @description 处理标签出栈 |
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* @private |
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*/ |
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parser.prototype.popNode = function () { |
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const node = this.stack.pop() |
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let { attrs } = node |
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const { children } = node |
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const parent = this.stack[this.stack.length - 1] |
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const siblings = parent ? parent.children : this.nodes |
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if (!this.hook(node) || config.ignoreTags[node.name]) { |
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// 获取标题 |
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if (node.name == 'title' && children.length && children[0].type == 'text' && this.options.setTitle) { |
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uni.setNavigationBarTitle({ |
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title: children[0].text |
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}) |
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} |
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siblings.pop() |
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return |
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} |
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if (node.pre) { |
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// 是否合并空白符标识 |
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node.pre = this.pre = void 0 |
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for (let i = this.stack.length; i--;) { |
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if (this.stack[i].pre) this.pre = true |
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} |
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} |
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|
|
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 |
|
*/ |
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lexer.prototype.endTag = function () { |
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const c = this.content[this.i] |
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if (blankChar[c] || c == '>' || c == '/') { |
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this.handler.onCloseTag(this.content.substring(this.start, this.i)) |
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if (c != '>') { |
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this.i = this.content.indexOf('>', this.i) |
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if (this.i == -1) return |
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} |
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this.start = ++this.i |
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this.state = this.text |
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} else this.i++ |
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} |
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module.exports = parser
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