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1333 lines
39 KiB
1333 lines
39 KiB
/** |
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* @fileoverview html 解析器 |
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*/ |
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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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|
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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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|
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// #ifdef (MP-WEIXIN || MP-QQ || APP-PLUS || MP-360) && VUE3 |
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// 行内标签 |
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inlineTags: makeMap('abbr,b,big,code,del,em,i,ins,label,q,small,span,strong,sub,sup'), |
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// #endif |
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|
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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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|
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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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|
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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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larr: '←', |
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uarr: '↑', |
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rarr: '→', |
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darr: '↓' |
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}, |
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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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strike: 'text-decoration:line-through', |
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u: 'text-decoration:underline' |
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// #endif |
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}, |
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|
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// svg 大小写对照表 |
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svgDict: { |
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animatetransform: 'animateTransform', |
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lineargradient: 'linearGradient', |
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viewbox: 'viewBox', |
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attributename: 'attributeName', |
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repeatcount: 'repeatCount', |
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repeatdur: 'repeatDur' |
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} |
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} |
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const tagSelector={} |
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const { |
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windowWidth, |
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// #ifdef MP-WEIXIN |
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system |
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// #endif |
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} = uni.getSystemInfoSync() |
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const blankChar = makeMap(' ,\r,\n,\t,\f') |
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let idIndex = 0 |
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|
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// #ifdef H5 || APP-PLUS |
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config.ignoreTags.iframe = undefined |
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config.trustTags.iframe = true |
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config.ignoreTags.embed = undefined |
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config.trustTags.embed = true |
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// #endif |
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// #ifdef APP-PLUS-NVUE |
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config.ignoreTags.source = undefined |
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config.ignoreTags.style = undefined |
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// #endif |
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|
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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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/** |
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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 |
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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)) { |
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str = str.substr(0, i) + String.fromCharCode(code) + str.substr(j + 1) |
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} |
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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)) { |
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str = str.substr(0, i) + (config.entities[code] || '&') + str.substr(j + 1) |
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} |
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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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/** |
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* @description 合并多个块级标签,加快长内容渲染 |
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* @param {Array} nodes 要合并的标签数组 |
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*/ |
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function mergeNodes (nodes) { |
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let i = nodes.length - 1 |
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for (let j = i; j >= -1; j--) { |
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if (j === -1 || nodes[j].c || !nodes[j].name || (nodes[j].name !== 'div' && nodes[j].name !== 'p' && nodes[j].name[0] !== 'h') || (nodes[j].attrs.style || '').includes('inline')) { |
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if (i - j >= 5) { |
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nodes.splice(j + 1, i - j, { |
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name: 'div', |
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attrs: {}, |
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children: nodes.slice(j + 1, i + 1) |
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}) |
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} |
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i = j - 1 |
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} |
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} |
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} |
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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.imgList._unloadimgs = 0 |
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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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this.pre = (this.options.containerStyle || '').includes('white-space') && this.options.containerStyle.includes('pre') ? 2 : 0 |
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} |
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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) { |
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content = this.plugins[i].onUpdate(content, config) || content |
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} |
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} |
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|
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new Lexer(this).parse(content) |
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// 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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if (this.nodes.length > 50) { |
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mergeNodes(this.nodes) |
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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.c || item.name === 'a' || item.name === 'video' || item.name === 'audio') return |
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item.c = 1 |
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} |
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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) { |
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return false |
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} |
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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.domain |
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if (url[0] === '/') { |
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if (url[1] === '/') { |
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// // 开头的补充协议名 |
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url = (domain ? domain.split('://')[0] : 'http') + ':' + url |
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} else if (domain) { |
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// 否则补充整个域名 |
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url = domain + url |
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} /* #ifdef APP-PLUS */ else { |
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url = plus.io.convertLocalFileSystemURL(url) |
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} /* #endif */ |
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} else if (!url.includes('data:') && !url.includes('://')) { |
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if (domain) { |
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url = domain + '/' + url |
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} /* #ifdef APP-PLUS */ else { |
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url = plus.io.convertLocalFileSystemURL(url) |
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} /* #endif */ |
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} |
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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.attrs |
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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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|
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if (attrs.id && !this.xml) { |
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// 暴露锚点 |
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if (this.options.useAnchor) { |
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this.expose() |
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} else if (node.name !== 'img' && node.name !== 'a' && node.name !== 'video' && node.name !== 'audio') { |
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attrs.id = undefined |
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} |
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} |
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|
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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 = undefined |
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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 = undefined |
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} |
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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() |
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if ((value[0] === '-' && value.lastIndexOf('-') > 0) || value.includes('safe')) { |
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// 兼容性的 css 不压缩 |
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tmp += `;${key}:${value}` |
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} else if (!styleObj[key] || value.includes('import') || !styleObj[key].includes('import')) { |
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// 重复的样式进行覆盖 |
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if (value.includes('url')) { |
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// 填充链接 |
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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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} else if (value.includes('rpx')) { |
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// 转换 rpx(rich-text 内部不支持 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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|
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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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/** |
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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') { |
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this.xml = (this.xml || 0) + 1 // svg 标签内大小写敏感 |
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} |
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} |
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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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if (name === 'data-src' && !this.attrs.src) { |
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// data-src 自动转为 src |
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this.attrName = 'src' |
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} else if (this.tagName === 'img' || this.tagName === 'a') { |
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// 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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this.attrName = name |
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} else { |
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// 剩余的移除以减小大小 |
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this.attrName = undefined |
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} |
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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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/** |
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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 || '' |
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if (name === 'style' || name === 'href') { |
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// 部分属性进行实体解码 |
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this.attrs[name] = decodeEntity(val, true) |
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} else if (name.includes('src')) { |
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// 拼接主域名 |
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this.attrs[name] = this.getUrl(decodeEntity(val, true)) |
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} else if (name) { |
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this.attrs[name] = val |
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} |
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} |
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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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// 避免因为自动 diff 使得 type 被设置为 null 导致部分内容不显示 |
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if (this.options.nodes.length) { |
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node.type = 'node' |
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} |
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this.attrs = Object.create(null) |
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|
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const attrs = node.attrs |
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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] |
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|
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// 替换标签名选择器 |
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if (tagSelector[node.name]) { |
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attrs.class = tagSelector[node.name] + (attrs.class ? ' ' + attrs.class : '') |
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} |
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|
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// 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 || '' |
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// 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')) { |
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node.name = 'video' |
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} else if (src.includes('.mp3') || src.includes('.wav') || src.includes('.aac') || src.includes('.m4a') || (attrs.type || '').includes('audio')) { |
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node.name = 'audio' |
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} |
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if (attrs.autostart) { |
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attrs.autoplay = 'T' |
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} |
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attrs.controls = 'T' |
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// #endif |
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// #ifdef H5 || APP-PLUS |
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this.expose() |
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// #endif |
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} |
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|
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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) { |
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attrs.id = 'v' + idIndex++ |
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} |
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// 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) { |
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attrs.controls = 'T' |
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} |
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// 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 = undefined |
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} |
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this.expose() |
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} |
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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]) { |
|
// 通过 base 标签设置主域名 |
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if (node.name === 'base' && !this.options.domain) { |
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this.options.domain = attrs.href |
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} /* #ifndef APP-PLUS-NVUE */ else if (node.name === 'source' && parent && (parent.name === 'video' || parent.name === 'audio') && attrs.src) { |
|
// 设置 source 标签(仅父节点为 video 或 audio 时有效) |
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parent.src.push(attrs.src) |
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} /* #endif */ |
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return |
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} |
|
|
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// 解析 style |
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const styleObj = this.parseStyle(node) |
|
|
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// 处理图片 |
|
if (node.name === 'img') { |
|
if (attrs.src) { |
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// 标记 webp |
|
if (attrs.src.includes('webp')) { |
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node.webp = 'T' |
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} |
|
// 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']) { |
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attrs.ignore = 'T' |
|
} |
|
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 |
|
} |
|
if (item.name === 'table' && !node.webp && !attrs.src.includes('cloud://')) { |
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if (!styleObj.display || styleObj.display.includes('inline')) { |
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node.t = 'inline-block' |
|
} else { |
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node.t = styleObj.display |
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} |
|
styleObj.display = undefined |
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} |
|
// #ifndef H5 || APP-PLUS |
|
const style = item.attrs.style || '' |
|
if (style.includes('flex:') && !style.includes('flex:0') && !style.includes('flex: 0') && (!styleObj.width || parseInt(styleObj.width) > 100)) { |
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styleObj.width = '100% !important' |
|
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-', '') |
|
} |
|
} 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) { |
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styleObj.width = '' |
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break |
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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 |
|
styleObj.width = '' |
|
} else { |
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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) |
|
if (!node.t) { |
|
this.imgList._unloadimgs += 1 |
|
} |
|
// #ifdef H5 || APP-PLUS |
|
if (this.options.lazyLoad) { |
|
attrs['data-src'] = attrs.src |
|
attrs.src = undefined |
|
} |
|
// #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 = undefined |
|
} |
|
// 记录是否设置了宽高 |
|
if (!isNaN(parseInt(styleObj.width))) { |
|
node.w = 'T' |
|
} |
|
if (!isNaN(parseInt(styleObj.height)) && (!styleObj.height.includes('%') || (parent && (parent.attrs.style || '').includes('height')))) { |
|
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 += `;${key}:${styleObj[key].replace(' !important', '')}` |
|
} |
|
} |
|
attrs.style = attrs.style.substr(1) || undefined |
|
// #ifdef (MP-WEIXIN || MP-QQ) && VUE3 |
|
if (!attrs.style) { |
|
delete attrs.style |
|
} |
|
// #endif |
|
} else { |
|
if ((node.name === 'pre' || ((attrs.style || '').includes('white-space') && attrs.style.includes('pre'))) && this.pre !== 2) { |
|
this.pre = node.pre = 1 |
|
} |
|
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: { |
|
class: tagSelector[name] || '', |
|
style: this.tagStyle[name] || '' |
|
} |
|
}) |
|
} |
|
} |
|
|
|
/** |
|
* @description 处理标签出栈 |
|
* @private |
|
*/ |
|
Parser.prototype.popNode = function () { |
|
const node = this.stack.pop() |
|
let attrs = node.attrs |
|
const children = node.children |
|
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 && this.pre !== 2) { |
|
// 是否合并空白符标识 |
|
this.pre = node.pre = undefined |
|
for (let i = this.stack.length; i--;) { |
|
if (this.stack[i].pre) { |
|
this.pre = 1 |
|
} |
|
} |
|
} |
|
|
|
const styleObj = {} |
|
|
|
// 转换 svg |
|
if (node.name === 'svg') { |
|
if (this.xml > 1) { |
|
// 多层 svg 嵌套 |
|
this.xml-- |
|
return |
|
} |
|
// #ifdef APP-PLUS-NVUE |
|
(function traversal (node) { |
|
if (node.name) { |
|
// 调整 svg 的大小写 |
|
node.name = config.svgDict[node.name] || node.name |
|
for (const item in node.attrs) { |
|
if (config.svgDict[item]) { |
|
node.attrs[config.svgDict[item]] = node.attrs[item] |
|
node.attrs[item] = undefined |
|
} |
|
} |
|
for (let i = 0; i < (node.children || []).length; i++) { |
|
traversal(node.children[i]) |
|
} |
|
} |
|
})(node) |
|
// #endif |
|
// #ifndef APP-PLUS-NVUE |
|
let src = '' |
|
const style = attrs.style |
|
attrs.style = '' |
|
attrs.xmlns = 'http://www.w3.org/2000/svg'; |
|
(function traversal (node) { |
|
if (node.type === 'text') { |
|
src += node.text |
|
return |
|
} |
|
const name = config.svgDict[node.name] || node.name |
|
src += '<' + name |
|
for (const item in node.attrs) { |
|
const val = node.attrs[item] |
|
if (val) { |
|
src += ` ${config.svgDict[item] || item}="${val}"` |
|
} |
|
} |
|
if (!node.children) { |
|
src += '/>' |
|
} else { |
|
src += '>' |
|
for (let i = 0; i < node.children.length; i++) { |
|
traversal(node.children[i]) |
|
} |
|
src += '</' + name + '>' |
|
} |
|
})(node) |
|
node.name = 'img' |
|
node.attrs = { |
|
src: 'data:image/svg+xml;utf8,' + src.replace(/#/g, '%23'), |
|
style, |
|
ignore: 'T' |
|
} |
|
node.children = undefined |
|
// #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 = undefined |
|
} |
|
|
|
// 转换 dir 属性 |
|
if (attrs.dir) { |
|
styleObj.direction = attrs.dir |
|
attrs.dir = undefined |
|
} |
|
|
|
// 转换 font 标签的属性 |
|
if (node.name === 'font') { |
|
if (attrs.color) { |
|
styleObj.color = attrs.color |
|
attrs.color = undefined |
|
} |
|
if (attrs.face) { |
|
styleObj['font-family'] = attrs.face |
|
attrs.face = undefined |
|
} |
|
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'] = ['x-small', 'small', 'medium', 'large', 'x-large', 'xx-large', 'xxx-large'][size - 1] |
|
} |
|
attrs.size = undefined |
|
} |
|
} |
|
// #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 (node.name !== 'table' && 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' |
|
} else if (!config.trustTags[node.name] && !this.xml) { |
|
// 未知标签转为 span,避免无法显示 |
|
node.name = 'span' |
|
} |
|
|
|
if (node.name === 'a' || node.name === 'ad' |
|
// #ifdef H5 || APP-PLUS |
|
|| node.name === 'iframe' // eslint-disable-line |
|
// #endif |
|
) { |
|
this.expose() |
|
} else if (node.name === 'video') { |
|
if ((styleObj.height || '').includes('auto')) { |
|
styleObj.height = undefined |
|
} |
|
/* #ifdef APP-PLUS */ |
|
let str = '<video style="width:100%;height:100%"' |
|
for (const item in attrs) { |
|
if (attrs[item]) { |
|
str += ' ' + item + '="' + attrs[item] + '"' |
|
} |
|
} |
|
if (this.options.pauseVideo) { |
|
str += ' onplay="this.dispatchEvent(new CustomEvent(\'vplay\',{bubbles:!0}));for(var e=document.getElementsByTagName(\'video\'),t=0;t<e.length;t++)e[t]!=this&&e[t].pause()"' |
|
} |
|
str += '>' |
|
for (let i = 0; i < node.src.length; i++) { |
|
str += '<source src="' + node.src[i] + '">' |
|
} |
|
str += '</video>' |
|
node.html = str |
|
/* #endif */ |
|
} else if ((node.name === 'ul' || node.name === 'ol') && node.c) { |
|
// 列表处理 |
|
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 = undefined |
|
} |
|
for (let i = children.length; i--;) { |
|
if (children[i].name === 'li') { |
|
children[i].c = 1 |
|
} |
|
} |
|
} else if (node.name === 'table') { |
|
// 表格处理 |
|
// 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) |
|
const bordercolor = styleObj['border-color'] |
|
const borderstyle = styleObj['border-style'] |
|
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 ${borderstyle || 'solid'} ${bordercolor || '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' |
|
} else if (border) { |
|
// 无间隔的情况下避免边框重叠 |
|
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 i = 0; i < nodes.length; i++) { |
|
if (nodes[i].name === 'tr') { |
|
trList.push(nodes[i]) |
|
} else { |
|
traversal(nodes[i].children || []) |
|
} |
|
} |
|
})(children) |
|
|
|
for (let row = 1; row <= trList.length; row++) { |
|
let col = 1 |
|
for (let j = 0; j < trList[row - 1].children.length; j++) { |
|
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 style = td.attrs.style || '' |
|
let start = style.indexOf('width') ? style.indexOf(';width') : 0 |
|
// 提取出 td 的宽度 |
|
if (start !== -1) { |
|
let end = style.indexOf(';', start + 6) |
|
if (end === -1) { |
|
end = style.length |
|
} |
|
if (!td.attrs.colspan) { |
|
width[col] = style.substring(start ? start + 7 : 6, end) |
|
} |
|
style = style.substr(0, start) + style.substr(end) |
|
} |
|
// 设置竖直对齐 |
|
style += ';display:flex' |
|
start = style.indexOf('vertical-align') |
|
if (start !== -1) { |
|
const val = style.substr(start + 15, 10) |
|
if (val.includes('middle')) { |
|
style += ';align-items:center' |
|
} else if (val.includes('bottom')) { |
|
style += ';align-items:flex-end' |
|
} |
|
} else { |
|
style += ';align-items:center' |
|
} |
|
// 设置水平对齐 |
|
start = style.indexOf('text-align') |
|
if (start !== -1) { |
|
const val = style.substr(start + 11, 10) |
|
if (val.includes('center')) { |
|
style += ';justify-content: center' |
|
} else if (val.includes('right')) { |
|
style += ';justify-content: right' |
|
} |
|
} |
|
style = (border ? `;border:${border}px ${borderstyle || 'solid'} ${bordercolor || 'gray'}` + (spacing ? '' : ';border-right:0;border-bottom:0') : '') + (padding ? `;padding:${padding}px` : '') + ';' + style |
|
// 处理列合并 |
|
if (td.attrs.colspan) { |
|
style += `;grid-column-start:${col};grid-column-end:${col + parseInt(td.attrs.colspan)}` |
|
if (!td.attrs.rowspan) { |
|
style += `;grid-row-start:${row};grid-row-end:${row + 1}` |
|
} |
|
col += parseInt(td.attrs.colspan) - 1 |
|
} |
|
// 处理行合并 |
|
if (td.attrs.rowspan) { |
|
style += `;grid-row-start:${row};grid-row-end:${row + parseInt(td.attrs.rowspan)}` |
|
if (!td.attrs.colspan) { |
|
style += `;grid-column-start:${col};grid-column-end:${col + 1}` |
|
} |
|
// 记录下方单元格被占用 |
|
for (let rowspan = 1; rowspan < td.attrs.rowspan; rowspan++) { |
|
for (let colspan = 0; colspan < (td.attrs.colspan || 1); colspan++) { |
|
map[(row + rowspan) + '.' + (col - colspan)] = 1 |
|
} |
|
} |
|
} |
|
if (style) { |
|
td.attrs.style = style |
|
} |
|
cells.push(td) |
|
col++ |
|
} |
|
} |
|
if (row === 1) { |
|
let temp = '' |
|
for (let i = 1; i < col; i++) { |
|
temp += (width[i] ? width[i] : '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 i = 0; i < nodes.length; i++) { |
|
const td = nodes[i] |
|
if (td.name === 'th' || td.name === 'td') { |
|
if (border) { |
|
td.attrs.style = `border:${border}px ${borderstyle || 'solid'} ${bordercolor || 'gray'};${td.attrs.style || ''}` |
|
} |
|
if (padding) { |
|
td.attrs.style = `padding:${padding}px;${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 = Object.assign({}, 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 i = this.stack.length; i--;) { |
|
if (this.stack[i].name === 'table') { |
|
this.stack[i].flag = 1 // 指示含有合并单元格 |
|
break |
|
} |
|
} |
|
} else if (node.name === 'ruby') { |
|
// 转换 ruby |
|
node.name = 'span' |
|
for (let i = 0; i < children.length - 1; i++) { |
|
if (children[i].type === 'text' && children[i + 1].name === 'rt') { |
|
children[i] = { |
|
name: 'div', |
|
attrs: { |
|
style: 'display:inline-block;text-align:center' |
|
}, |
|
children: [{ |
|
name: 'div', |
|
attrs: { |
|
style: 'font-size:50%;' + (children[i + 1].attrs.style || '') |
|
}, |
|
children: children[i + 1].children |
|
}, children[i]] |
|
} |
|
children.splice(i + 1, 1) |
|
} |
|
} |
|
} else if (node.c) { |
|
(function traversal (node) { |
|
node.c = 2 |
|
for (let i = node.children.length; i--;) { |
|
const child = node.children[i] |
|
// #ifdef (MP-WEIXIN || MP-QQ || APP-PLUS || MP-360) && VUE3 |
|
if (child.name && (config.inlineTags[child.name] || ((child.attrs.style || '').includes('inline') && child.children)) && !child.c) { |
|
traversal(child) |
|
} |
|
// #endif |
|
if (!child.c || child.name === 'table') { |
|
node.c = 1 |
|
} |
|
} |
|
})(node) |
|
} |
|
|
|
if ((styleObj.display || '').includes('flex') && !node.c) { |
|
for (let i = children.length; i--;) { |
|
const item = children[i] |
|
if (item.f) { |
|
item.attrs.style = (item.attrs.style || '') + item.f |
|
item.f = undefined |
|
} |
|
} |
|
} |
|
// 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') || (parent.attrs.style || '').includes('grid')) |
|
// #ifdef MP-WEIXIN |
|
// 检查基础库版本 virtualHost 是否可用 |
|
&& !(node.c && wx.getNFCAdapter) // eslint-disable-line |
|
// #endif |
|
// #ifndef MP-WEIXIN || MP-QQ || MP-BAIDU || MP-TOUTIAO |
|
&& !node.c // eslint-disable-line |
|
// #endif |
|
if (flex) { |
|
node.f = ';max-width:100%' |
|
} |
|
|
|
if (children.length >= 50 && node.c && !(styleObj.display || '').includes('flex')) { |
|
mergeNodes(children) |
|
} |
|
// #endif |
|
|
|
for (const key in styleObj) { |
|
if (styleObj[key]) { |
|
const val = `;${key}:${styleObj[key].replace(' !important', '')}` |
|
/* #ifndef APP-PLUS-NVUE */ |
|
if (flex && ((key.includes('flex') && key !== 'flex-direction') || key === 'align-self' || key.includes('grid') || styleObj[key][0] === '-' || (key.includes('width') && val.includes('%')))) { |
|
node.f += val |
|
if (key === 'width') { |
|
attrs.style += ';width:100%' |
|
} |
|
} else /* #endif */ { |
|
attrs.style += val |
|
} |
|
} |
|
} |
|
attrs.style = attrs.style.substr(1) || undefined |
|
// #ifdef (MP-WEIXIN || MP-QQ) && VUE3 |
|
for (const key in attrs) { |
|
if (!attrs[key]) { |
|
delete attrs[key] |
|
} |
|
} |
|
// #endif |
|
} |
|
|
|
/** |
|
* @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 === ' ') { |
|
if (flag) return |
|
// #ifdef VUE3 |
|
else { |
|
const parent = this.stack[this.stack.length - 1] |
|
if (parent && parent.name[0] === 't') return |
|
} |
|
// #endif |
|
} |
|
text = trim |
|
} |
|
const node = Object.create(null) |
|
node.type = 'text' |
|
// #ifdef (MP-BAIDU || MP-ALIPAY || MP-TOUTIAO) && VUE3 |
|
node.attrs = {} |
|
// #endif |
|
node.text = decodeEntity(text) |
|
if (this.hook(node)) { |
|
// #ifdef MP-WEIXIN |
|
if (this.options.selectable === 'force' && system.includes('iOS') && !uni.canIUse('rich-text.user-select')) { |
|
this.expose() |
|
} |
|
// #endif |
|
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 |
|
this.state = this.endTag |
|
return |
|
} |
|
// 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 |
|
this.state = this.attrVal |
|
return |
|
} |
|
if (this.content[this.i] === '=') { |
|
needVal = true |
|
} else { |
|
this.start = this.i |
|
this.state = this.attrName |
|
return |
|
} |
|
} |
|
} |
|
} 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 |
|
if (c === '"' || c === "'") { |
|
// 有冒号的属性 |
|
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)) |
|
} else { |
|
// 没有冒号的属性 |
|
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++ |
|
} |
|
} |
|
|
|
export default Parser
|
|
|