581 lines
18 KiB
JavaScript
581 lines
18 KiB
JavaScript
/**
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* html 解析器
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* @tutorial https://github.com/jin-yufeng/Parser
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* @version 20201029
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* @author JinYufeng
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* @listens MIT
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*/
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const cfg = require('./config.js'),
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blankChar = cfg.blankChar,
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CssHandler = require('./CssHandler.js'),
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windowWidth = uni.getSystemInfoSync().windowWidth;
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var emoji;
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function MpHtmlParser(data, options = {}) {
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this.attrs = {};
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this.CssHandler = new CssHandler(options.tagStyle, windowWidth);
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this.data = data;
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this.domain = options.domain;
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this.DOM = [];
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this.i = this.start = this.audioNum = this.imgNum = this.videoNum = 0;
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options.prot = (this.domain || '').includes('://') ? this.domain.split('://')[0] : 'http';
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this.options = options;
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this.state = this.Text;
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this.STACK = [];
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// 工具函数
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this.bubble = () => {
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for (var i = this.STACK.length, item; item = this.STACK[--i];) {
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if (cfg.richOnlyTags[item.name]) return false;
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item.c = 1;
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}
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return true;
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}
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this.decode = (val, amp) => {
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var i = -1,
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j, en;
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while (1) {
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if ((i = val.indexOf('&', i + 1)) == -1) break;
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if ((j = val.indexOf(';', i + 2)) == -1) break;
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if (val[i + 1] == '#') {
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en = parseInt((val[i + 2] == 'x' ? '0' : '') + val.substring(i + 2, j));
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if (!isNaN(en)) val = val.substr(0, i) + String.fromCharCode(en) + val.substr(j + 1);
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} else {
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en = val.substring(i + 1, j);
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if (cfg.entities[en] || en == amp)
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val = val.substr(0, i) + (cfg.entities[en] || '&') + val.substr(j + 1);
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}
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}
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return val;
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}
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this.getUrl = url => {
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if (url[0] == '/') {
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if (url[1] == '/') url = this.options.prot + ':' + url;
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else if (this.domain) url = this.domain + url;
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} else if (this.domain && url.indexOf('data:') != 0 && !url.includes('://'))
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url = this.domain + '/' + url;
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return url;
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}
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this.isClose = () => this.data[this.i] == '>' || (this.data[this.i] == '/' && this.data[this.i + 1] == '>');
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this.section = () => this.data.substring(this.start, this.i);
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this.parent = () => this.STACK[this.STACK.length - 1];
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this.siblings = () => this.STACK.length ? this.parent().children : this.DOM;
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}
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MpHtmlParser.prototype.parse = function() {
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if (emoji) this.data = emoji.parseEmoji(this.data);
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for (var c; c = this.data[this.i]; this.i++)
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this.state(c);
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if (this.state == this.Text) this.setText();
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while (this.STACK.length) this.popNode(this.STACK.pop());
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return this.DOM;
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}
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// 设置属性
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MpHtmlParser.prototype.setAttr = function() {
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var name = this.attrName.toLowerCase(),
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val = this.attrVal;
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if (cfg.boolAttrs[name]) this.attrs[name] = 'T';
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else if (val) {
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if (name == 'src' || (name == 'data-src' && !this.attrs.src)) this.attrs.src = this.getUrl(this.decode(val, 'amp'));
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else if (name == 'href' || name == 'style') this.attrs[name] = this.decode(val, 'amp');
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else if (name.substr(0, 5) != 'data-') this.attrs[name] = val;
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}
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this.attrVal = '';
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while (blankChar[this.data[this.i]]) this.i++;
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if (this.isClose()) this.setNode();
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else {
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this.start = this.i;
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this.state = this.AttrName;
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}
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}
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// 设置文本节点
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MpHtmlParser.prototype.setText = function() {
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var back, text = this.section();
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if (!text) return;
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text = (cfg.onText && cfg.onText(text, () => back = true)) || text;
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if (back) {
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this.data = this.data.substr(0, this.start) + text + this.data.substr(this.i);
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let j = this.start + text.length;
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for (this.i = this.start; this.i < j; this.i++) this.state(this.data[this.i]);
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return;
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}
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if (!this.pre) {
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// 合并空白符
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var flag, tmp = [];
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for (let i = text.length, c; c = text[--i];)
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if (!blankChar[c]) {
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tmp.unshift(c);
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if (!flag) flag = 1;
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} else {
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if (tmp[0] != ' ') tmp.unshift(' ');
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if (c == '\n' && flag == void 0) flag = 0;
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}
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if (flag == 0) return;
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text = tmp.join('');
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}
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this.siblings().push({
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type: 'text',
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text: this.decode(text)
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});
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}
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// 设置元素节点
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MpHtmlParser.prototype.setNode = function() {
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var node = {
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name: this.tagName.toLowerCase(),
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attrs: this.attrs
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},
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close = cfg.selfClosingTags[node.name];
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if (this.options.nodes.length) node.type = 'node';
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this.attrs = {};
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if (!cfg.ignoreTags[node.name]) {
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// 处理属性
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var attrs = node.attrs,
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style = this.CssHandler.match(node.name, attrs, node) + (attrs.style || ''),
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styleObj = {};
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if (attrs.id) {
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if (this.options.compress & 1) attrs.id = void 0;
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else if (this.options.useAnchor) this.bubble();
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}
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if ((this.options.compress & 2) && attrs.class) attrs.class = void 0;
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switch (node.name) {
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case 'a':
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case 'ad': // #ifdef APP-PLUS
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case 'iframe':
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// #endif
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this.bubble();
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break;
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case 'font':
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if (attrs.color) {
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styleObj['color'] = attrs.color;
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attrs.color = void 0;
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}
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if (attrs.face) {
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styleObj['font-family'] = attrs.face;
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attrs.face = void 0;
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}
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if (attrs.size) {
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var size = parseInt(attrs.size);
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if (size < 1) size = 1;
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else if (size > 7) size = 7;
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var map = ['xx-small', 'x-small', 'small', 'medium', 'large', 'x-large', 'xx-large'];
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styleObj['font-size'] = map[size - 1];
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attrs.size = void 0;
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}
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break;
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case 'embed':
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// #ifndef APP-PLUS
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var src = node.attrs.src || '',
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type = node.attrs.type || '';
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if (type.includes('video') || src.includes('.mp4') || src.includes('.3gp') || src.includes('.m3u8'))
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node.name = 'video';
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else if (type.includes('audio') || src.includes('.m4a') || src.includes('.wav') || src.includes('.mp3') || src.includes(
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'.aac'))
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node.name = 'audio';
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else break;
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if (node.attrs.autostart)
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node.attrs.autoplay = 'T';
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node.attrs.controls = 'T';
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// #endif
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// #ifdef APP-PLUS
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this.bubble();
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break;
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// #endif
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case 'video':
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case 'audio':
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if (!attrs.id) attrs.id = node.name + (++this[`${node.name}Num`]);
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else this[`${node.name}Num`]++;
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if (node.name == 'video') {
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if (this.videoNum > 3)
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node.lazyLoad = 1;
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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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}
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if (!attrs.controls && !attrs.autoplay) attrs.controls = 'T';
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attrs.source = [];
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if (attrs.src) {
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attrs.source.push(attrs.src);
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attrs.src = void 0;
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}
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this.bubble();
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break;
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case 'td':
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case 'th':
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if (attrs.colspan || attrs.rowspan)
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for (var k = this.STACK.length, item; item = this.STACK[--k];)
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if (item.name == 'table') {
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item.flag = 1;
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break;
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}
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}
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if (attrs.align) {
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if (node.name == 'table') {
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if (attrs.align == 'center') styleObj['margin-inline-start'] = styleObj['margin-inline-end'] = 'auto';
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else styleObj['float'] = attrs.align;
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} else styleObj['text-align'] = attrs.align;
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attrs.align = void 0;
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}
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// 压缩 style
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var styles = style.split(';');
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style = '';
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for (var i = 0, len = styles.length; i < len; i++) {
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var info = styles[i].split(':');
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if (info.length < 2) continue;
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let key = info[0].trim().toLowerCase(),
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value = info.slice(1).join(':').trim();
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if (value[0] == '-' || value.includes('safe'))
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style += `;${key}:${value}`;
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else if (!styleObj[key] || value.includes('import') || !styleObj[key].includes('import'))
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styleObj[key] = value;
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}
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if (node.name == 'img') {
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if (attrs.src && !attrs.ignore) {
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if (this.bubble())
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attrs.i = (this.imgNum++).toString();
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else attrs.ignore = 'T';
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}
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if (attrs.ignore) {
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style += ';-webkit-touch-callout:none';
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styleObj['max-width'] = '100%';
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}
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var width;
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if (styleObj.width) width = styleObj.width;
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else if (attrs.width) width = attrs.width.includes('%') ? attrs.width : parseFloat(attrs.width) + 'px';
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if (width) {
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styleObj.width = width;
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attrs.width = '100%';
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if (parseInt(width) > windowWidth) {
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styleObj.height = '';
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if (attrs.height) attrs.height = void 0;
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}
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}
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if (styleObj.height) {
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attrs.height = styleObj.height;
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styleObj.height = '';
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} else if (attrs.height && !attrs.height.includes('%'))
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attrs.height = parseFloat(attrs.height) + 'px';
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}
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for (var key in styleObj) {
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var value = styleObj[key];
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if (!value) continue;
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if (key.includes('flex') || key == 'order' || key == 'self-align') node.c = 1;
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// 填充链接
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if (value.includes('url')) {
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var j = value.indexOf('(');
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if (j++ != -1) {
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while (value[j] == '"' || value[j] == "'" || blankChar[value[j]]) j++;
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value = value.substr(0, j) + this.getUrl(value.substr(j));
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}
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}
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// 转换 rpx
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else if (value.includes('rpx'))
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value = value.replace(/[0-9.]+\s*rpx/g, $ => parseFloat($) * windowWidth / 750 + 'px');
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else if (key == 'white-space' && value.includes('pre') && !close)
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this.pre = node.pre = true;
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style += `;${key}:${value}`;
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}
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style = style.substr(1);
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if (style) attrs.style = style;
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if (!close) {
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node.children = [];
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if (node.name == 'pre' && cfg.highlight) {
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this.remove(node);
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this.pre = node.pre = true;
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}
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this.siblings().push(node);
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this.STACK.push(node);
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} else if (!cfg.filter || cfg.filter(node, this) != false)
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this.siblings().push(node);
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} else {
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if (!close) this.remove(node);
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else if (node.name == 'source') {
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var parent = this.parent();
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if (parent && (parent.name == 'video' || parent.name == 'audio') && node.attrs.src)
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parent.attrs.source.push(node.attrs.src);
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} else if (node.name == 'base' && !this.domain) this.domain = node.attrs.href;
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}
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if (this.data[this.i] == '/') this.i++;
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this.start = this.i + 1;
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this.state = this.Text;
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}
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// 移除标签
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MpHtmlParser.prototype.remove = function(node) {
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var name = node.name,
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j = this.i;
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// 处理 svg
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var handleSvg = () => {
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var src = this.data.substring(j, this.i + 1);
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node.attrs.xmlns = 'http://www.w3.org/2000/svg';
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for (var key in node.attrs) {
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if (key == 'viewbox') src = ` viewBox="${node.attrs.viewbox}"` + src;
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else if (key != 'style') src = ` ${key}="${node.attrs[key]}"` + src;
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}
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src = '<svg' + src;
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var parent = this.parent();
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if (node.attrs.width == '100%' && parent && (parent.attrs.style || '').includes('inline'))
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parent.attrs.style = 'width:300px;max-width:100%;' + parent.attrs.style;
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this.siblings().push({
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name: 'img',
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attrs: {
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src: 'data:image/svg+xml;utf8,' + src.replace(/#/g, '%23'),
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style: node.attrs.style,
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ignore: 'T'
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}
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})
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}
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if (node.name == 'svg' && this.data[j] == '/') return handleSvg(this.i++);
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while (1) {
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if ((this.i = this.data.indexOf('</', this.i + 1)) == -1) {
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if (name == 'pre' || name == 'svg') this.i = j;
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else this.i = this.data.length;
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return;
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}
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this.start = (this.i += 2);
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while (!blankChar[this.data[this.i]] && !this.isClose()) this.i++;
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if (this.section().toLowerCase() == name) {
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// 代码块高亮
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if (name == 'pre') {
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this.data = this.data.substr(0, j + 1) + cfg.highlight(this.data.substring(j + 1, this.i - 5), node.attrs) + this.data
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.substr(this.i - 5);
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return this.i = j;
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} else if (name == 'style')
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this.CssHandler.getStyle(this.data.substring(j + 1, this.i - 7));
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else if (name == 'title')
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this.DOM.title = this.data.substring(j + 1, this.i - 7);
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if ((this.i = this.data.indexOf('>', this.i)) == -1) this.i = this.data.length;
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if (name == 'svg') handleSvg();
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return;
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}
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}
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}
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// 节点出栈处理
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MpHtmlParser.prototype.popNode = function(node) {
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// 空白符处理
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if (node.pre) {
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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)
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this.pre = true;
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}
|
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var siblings = this.siblings(),
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len = siblings.length,
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childs = node.children;
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if (node.name == 'head' || (cfg.filter && cfg.filter(node, this) == false))
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return siblings.pop();
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var attrs = node.attrs;
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// 替换一些标签名
|
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if (cfg.blockTags[node.name]) node.name = 'div';
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else if (!cfg.trustTags[node.name]) node.name = 'span';
|
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// 处理列表
|
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if (node.c && (node.name == 'ul' || node.name == 'ol')) {
|
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if ((node.attrs.style || '').includes('list-style:none')) {
|
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for (let i = 0, child; child = childs[i++];)
|
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if (child.name == 'li')
|
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child.name = 'div';
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} else if (node.name == 'ul') {
|
|
var floor = 1;
|
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for (let i = this.STACK.length; i--;)
|
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if (this.STACK[i].name == 'ul') floor++;
|
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if (floor != 1)
|
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for (let i = childs.length; i--;)
|
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childs[i].floor = floor;
|
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} else {
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for (let i = 0, num = 1, child; child = childs[i++];)
|
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if (child.name == 'li') {
|
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child.type = 'ol';
|
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child.num = ((num, type) => {
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if (type == 'a') return String.fromCharCode(97 + (num - 1) % 26);
|
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if (type == 'A') return String.fromCharCode(65 + (num - 1) % 26);
|
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if (type == 'i' || type == 'I') {
|
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num = (num - 1) % 99 + 1;
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var one = ['I', 'II', 'III', 'IV', 'V', 'VI', 'VII', 'VIII', 'IX'],
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ten = ['X', 'XX', 'XXX', 'XL', 'L', 'LX', 'LXX', 'LXXX', 'XC'],
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res = (ten[Math.floor(num / 10) - 1] || '') + (one[num % 10 - 1] || '');
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if (type == 'i') return res.toLowerCase();
|
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return res;
|
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}
|
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return num;
|
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})(num++, attrs.type) + '.';
|
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}
|
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}
|
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}
|
|
// 处理表格
|
|
if (node.name == 'table') {
|
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var padding = parseFloat(attrs.cellpadding),
|
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spacing = parseFloat(attrs.cellspacing),
|
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border = parseFloat(attrs.border);
|
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if (node.c) {
|
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if (isNaN(padding)) padding = 2;
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if (isNaN(spacing)) spacing = 2;
|
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}
|
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if (border) attrs.style = `border:${border}px solid gray;${attrs.style || ''}`;
|
|
if (node.flag && node.c) {
|
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// 有 colspan 或 rowspan 且含有链接的表格转为 grid 布局实现
|
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attrs.style = `${attrs.style || ''};${spacing ? `;grid-gap:${spacing}px` : ';border-left:0;border-top:0'}`;
|
|
var row = 1,
|
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col = 1,
|
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colNum,
|
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trs = [],
|
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children = [],
|
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map = {};
|
|
(function f(ns) {
|
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for (var i = 0; i < ns.length; i++) {
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if (ns[i].name == 'tr') trs.push(ns[i]);
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else f(ns[i].children || []);
|
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}
|
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})(node.children)
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for (let i = 0; i < trs.length; i++) {
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for (let j = 0, td; td = trs[i].children[j]; j++) {
|
|
if (td.name == 'td' || td.name == 'th') {
|
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while (map[row + '.' + col]) col++;
|
|
var cell = {
|
|
name: 'div',
|
|
c: 1,
|
|
attrs: {
|
|
style: (td.attrs.style || '') + (border ? `;border:${border}px solid gray` + (spacing ? '' :
|
|
';border-right:0;border-bottom:0') : '') + (padding ? `;padding:${padding}px` : '')
|
|
},
|
|
children: td.children
|
|
}
|
|
if (td.attrs.colspan) {
|
|
cell.attrs.style += ';grid-column-start:' + col + ';grid-column-end:' + (col + parseInt(td.attrs.colspan));
|
|
if (!td.attrs.rowspan) cell.attrs.style += ';grid-row-start:' + row + ';grid-row-end:' + (row + 1);
|
|
col += parseInt(td.attrs.colspan) - 1;
|
|
}
|
|
if (td.attrs.rowspan) {
|
|
cell.attrs.style += ';grid-row-start:' + row + ';grid-row-end:' + (row + parseInt(td.attrs.rowspan));
|
|
if (!td.attrs.colspan) cell.attrs.style += ';grid-column-start:' + col + ';grid-column-end:' + (col + 1);
|
|
for (var k = 1; k < td.attrs.rowspan; k++) map[(row + k) + '.' + col] = 1;
|
|
}
|
|
children.push(cell);
|
|
col++;
|
|
}
|
|
}
|
|
if (!colNum) {
|
|
colNum = col - 1;
|
|
attrs.style += `;grid-template-columns:repeat(${colNum},auto)`
|
|
}
|
|
col = 1;
|
|
row++;
|
|
}
|
|
node.children = children;
|
|
} else {
|
|
attrs.style = `border-spacing:${spacing}px;${attrs.style || ''}`;
|
|
if (border || padding)
|
|
(function f(ns) {
|
|
for (var i = 0, n; n = ns[i]; i++) {
|
|
if (n.name == 'th' || n.name == 'td') {
|
|
if (border) n.attrs.style = `border:${border}px solid gray;${n.attrs.style || ''}`;
|
|
if (padding) n.attrs.style = `padding:${padding}px;${n.attrs.style || ''}`;
|
|
} else f(n.children || []);
|
|
}
|
|
})(childs)
|
|
}
|
|
if (this.options.autoscroll) {
|
|
var table = Object.assign({}, node);
|
|
node.name = 'div';
|
|
node.attrs = {
|
|
style: 'overflow:scroll'
|
|
}
|
|
node.children = [table];
|
|
}
|
|
}
|
|
this.CssHandler.pop && this.CssHandler.pop(node);
|
|
// 自动压缩
|
|
if (node.name == 'div' && !Object.keys(attrs).length && childs.length == 1 && childs[0].name == 'div')
|
|
siblings[len - 1] = childs[0];
|
|
}
|
|
// 状态机
|
|
MpHtmlParser.prototype.Text = function(c) {
|
|
if (c == '<') {
|
|
var next = this.data[this.i + 1],
|
|
isLetter = c => (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');
|
|
if (isLetter(next)) {
|
|
this.setText();
|
|
this.start = this.i + 1;
|
|
this.state = this.TagName;
|
|
} else if (next == '/') {
|
|
this.setText();
|
|
if (isLetter(this.data[++this.i + 1])) {
|
|
this.start = this.i + 1;
|
|
this.state = this.EndTag;
|
|
} else this.Comment();
|
|
} else if (next == '!' || next == '?') {
|
|
this.setText();
|
|
this.Comment();
|
|
}
|
|
}
|
|
}
|
|
MpHtmlParser.prototype.Comment = function() {
|
|
var key;
|
|
if (this.data.substring(this.i + 2, this.i + 4) == '--') key = '-->';
|
|
else if (this.data.substring(this.i + 2, this.i + 9) == '[CDATA[') key = ']]>';
|
|
else key = '>';
|
|
if ((this.i = this.data.indexOf(key, this.i + 2)) == -1) this.i = this.data.length;
|
|
else this.i += key.length - 1;
|
|
this.start = this.i + 1;
|
|
this.state = this.Text;
|
|
}
|
|
MpHtmlParser.prototype.TagName = function(c) {
|
|
if (blankChar[c]) {
|
|
this.tagName = this.section();
|
|
while (blankChar[this.data[this.i]]) this.i++;
|
|
if (this.isClose()) this.setNode();
|
|
else {
|
|
this.start = this.i;
|
|
this.state = this.AttrName;
|
|
}
|
|
} else if (this.isClose()) {
|
|
this.tagName = this.section();
|
|
this.setNode();
|
|
}
|
|
}
|
|
MpHtmlParser.prototype.AttrName = function(c) {
|
|
if (c == '=' || blankChar[c] || this.isClose()) {
|
|
this.attrName = this.section();
|
|
if (blankChar[c])
|
|
while (blankChar[this.data[++this.i]]);
|
|
if (this.data[this.i] == '=') {
|
|
while (blankChar[this.data[++this.i]]);
|
|
this.start = this.i--;
|
|
this.state = this.AttrValue;
|
|
} else this.setAttr();
|
|
}
|
|
}
|
|
MpHtmlParser.prototype.AttrValue = function(c) {
|
|
if (c == '"' || c == "'") {
|
|
this.start++;
|
|
if ((this.i = this.data.indexOf(c, this.i + 1)) == -1) return this.i = this.data.length;
|
|
this.attrVal = this.section();
|
|
this.i++;
|
|
} else {
|
|
for (; !blankChar[this.data[this.i]] && !this.isClose(); this.i++);
|
|
this.attrVal = this.section();
|
|
}
|
|
this.setAttr();
|
|
}
|
|
MpHtmlParser.prototype.EndTag = function(c) {
|
|
if (blankChar[c] || c == '>' || c == '/') {
|
|
var name = this.section().toLowerCase();
|
|
for (var i = this.STACK.length; i--;)
|
|
if (this.STACK[i].name == name) break;
|
|
if (i != -1) {
|
|
var node;
|
|
while ((node = this.STACK.pop()).name != name) this.popNode(node);
|
|
this.popNode(node);
|
|
} else if (name == 'p' || name == 'br')
|
|
this.siblings().push({
|
|
name,
|
|
attrs: {}
|
|
});
|
|
this.i = this.data.indexOf('>', this.i);
|
|
this.start = this.i + 1;
|
|
if (this.i == -1) this.i = this.data.length;
|
|
else this.state = this.Text;
|
|
}
|
|
}
|
|
module.exports = MpHtmlParser;
|