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quantulr
192
wxParse/htmlparser.js
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192
wxParse/htmlparser.js
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/**
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*
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* htmlParser改造自: https://github.com/blowsie/Pure-JavaScript-HTML5-Parser
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*
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* author: Di (微信小程序开发工程师)
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* organization: WeAppDev(微信小程序开发论坛)(http://weappdev.com)
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* 垂直微信小程序开发交流社区
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*
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* github地址: https://github.com/icindy/wxParse
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*
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* for: 微信小程序富文本解析
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* detail : http://weappdev.com/t/wxparse-alpha0-1-html-markdown/184
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*/
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// Regular Expressions for parsing tags and attributes
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var startTag = /^<([-A-Za-z0-9_]+)((?:\s+[a-zA-Z_:][-a-zA-Z0-9_:.]*(?:\s*=\s*(?:(?:"[^"]*")|(?:'[^']*')|[^>\s]+))?)*)\s*(\/?)>/,
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endTag = /^<\/([-A-Za-z0-9_]+)[^>]*>/,
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attr = /([a-zA-Z_:][-a-zA-Z0-9_:.]*)(?:\s*=\s*(?:(?:"((?:\\.|[^"])*)")|(?:'((?:\\.|[^'])*)')|([^>\s]+)))?/g;
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// Empty Elements - HTML 5
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var empty = makeMap("area,base,basefont,br,col,frame,hr,img,input,link,meta,param,embed,command,keygen,source,track,wbr");
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// Block Elements - HTML 5
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var block = makeMap("a,address,code,article,applet,aside,audio,blockquote,button,canvas,center,dd,del,dir,div,dl,dt,fieldset,figcaption,figure,footer,form,frameset,h1,h2,h3,h4,h5,h6,header,hgroup,hr,iframe,ins,isindex,li,map,menu,noframes,noscript,object,ol,output,p,pre,section,script,table,tbody,td,tfoot,th,thead,tr,ul,video");
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// Inline Elements - HTML 5
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var inline = makeMap("abbr,acronym,applet,b,basefont,bdo,big,br,button,cite,del,dfn,em,font,i,iframe,img,input,ins,kbd,label,map,object,q,s,samp,script,select,small,span,strike,strong,sub,sup,textarea,tt,u,var");
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// Elements that you can, intentionally, leave open
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// (and which close themselves)
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var closeSelf = makeMap("colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr");
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// Attributes that have their values filled in disabled="disabled"
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var fillAttrs = makeMap("checked,compact,declare,defer,disabled,ismap,multiple,nohref,noresize,noshade,nowrap,readonly,selected");
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// Special Elements (can contain anything)
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var special = makeMap("wxxxcode-style,script,style,view,scroll-view,block");
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function HTMLParser(html, handler) {
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var index, chars, match, stack = [], last = html;
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stack.last = function () {
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return this[this.length - 1];
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};
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while (html) {
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chars = true;
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// Make sure we're not in a script or style element
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if (!stack.last() || !special[stack.last()]) {
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// Comment
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if (html.indexOf("<!--") == 0) {
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index = html.indexOf("-->");
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if (index >= 0) {
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if (handler.comment)
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handler.comment(html.substring(4, index));
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html = html.substring(index + 3);
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chars = false;
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}
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// end tag
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} else if (html.indexOf("</") == 0) {
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match = html.match(endTag);
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if (match) {
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html = html.substring(match[0].length);
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match[0].replace(endTag, parseEndTag);
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chars = false;
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}
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// start tag
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} else if (html.indexOf("<") == 0) {
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match = html.match(startTag);
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if (match) {
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html = html.substring(match[0].length);
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match[0].replace(startTag, parseStartTag);
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chars = false;
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}
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}
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if (chars) {
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index = html.indexOf("<");
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var text = ''
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while (index === 0) {
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text += "<";
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html = html.substring(1);
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index = html.indexOf("<");
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}
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text += index < 0 ? html : html.substring(0, index);
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html = index < 0 ? "" : html.substring(index);
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if (handler.chars)
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handler.chars(text);
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}
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} else {
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html = html.replace(new RegExp("([\\s\\S]*?)<\/" + stack.last() + "[^>]*>"), function (all, text) {
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text = text.replace(/<!--([\s\S]*?)-->|<!\[CDATA\[([\s\S]*?)]]>/g, "$1$2");
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if (handler.chars)
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handler.chars(text);
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return "";
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});
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parseEndTag("", stack.last());
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}
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if (html == last)
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throw "Parse Error: " + html;
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last = html;
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}
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// Clean up any remaining tags
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parseEndTag();
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function parseStartTag(tag, tagName, rest, unary) {
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tagName = tagName.toLowerCase();
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if (block[tagName]) {
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while (stack.last() && inline[stack.last()]) {
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parseEndTag("", stack.last());
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}
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}
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if (closeSelf[tagName] && stack.last() == tagName) {
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parseEndTag("", tagName);
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}
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unary = empty[tagName] || !!unary;
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if (!unary)
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stack.push(tagName);
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if (handler.start) {
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var attrs = [];
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rest.replace(attr, function (match, name) {
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var value = arguments[2] ? arguments[2] :
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arguments[3] ? arguments[3] :
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arguments[4] ? arguments[4] :
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fillAttrs[name] ? name : "";
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attrs.push({
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name: name,
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value: value,
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escaped: value.replace(/(^|[^\\])"/g, '$1\\\"') //"
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});
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});
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if (handler.start) {
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handler.start(tagName, attrs, unary);
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}
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}
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}
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function parseEndTag(tag, tagName) {
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// If no tag name is provided, clean shop
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if (!tagName)
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var pos = 0;
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// Find the closest opened tag of the same type
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else {
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tagName = tagName.toLowerCase();
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for (var pos = stack.length - 1; pos >= 0; pos--)
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if (stack[pos] == tagName)
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break;
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}
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if (pos >= 0) {
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// Close all the open elements, up the stack
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for (var i = stack.length - 1; i >= pos; i--)
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if (handler.end)
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handler.end(stack[i]);
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// Remove the open elements from the stack
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stack.length = pos;
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}
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}
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};
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function makeMap(str) {
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var obj = {}, items = str.split(",");
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for (var i = 0; i < items.length; i++)
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obj[items[i]] = true;
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return obj;
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}
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module.exports = HTMLParser;
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