微信小程序源码 知乎日报1(学习版)

/* * HTML Parser By John Resig (ejohn.org) * Original code by Erik Arvidsson, Mozilla Public License * http://erik.eae.net/simplehtmlparser/simplehtmlparser.js * * // Use like so: * HTMLParser(htmlString, { * start: function(tag, attrs, unary) {}, * end: function(tag) {}, * chars: function(text) {}, * comment: function(text) {} * }); * * // or to get an XML string: * HTMLtoXML(htmlString); * * // or to get an XML DOM Document * HTMLtoDOM(htmlString); * * // or to inject into an existing document/DOM node * HTMLtoDOM(htmlString, document); * HTMLtoDOM(htmlString, document.body); * */ // Regular Expressions for parsing tags and attributes var startTag = /^<(\w+)((?:\s+[\w\-]+(?:\s*=\s*(?:(?:"[^"]*")|(?:'[^']*')|[^>\s]+))?)*)\s*(\/?)>/, endTag = /^<\/(\w+)[^>]*>/, attr = /([\w\-]+)(?:\s*=\s*(?:(?:"((?:\\.|[^"])*)")|(?:'((?:\\.|[^'])*)')|([^>\s]+)))?/g; // Empty Elements - HTML 4.01 var empty = makeMap( "area,base,basefont,br,col,frame,hr,img,input,isindex,link,meta,param,embed" ); // Block Elements - HTML 4.01 var block = makeMap( "address,applet,blockquote,button,center,dd,del,dir,div,dl,dt,fieldset,form,frameset,hr,iframe,ins,isindex,li,map,menu,noframes,noscript,object,ol,p,pre,script,table,tbody,td,tfoot,th,thead,tr,ul" ); // Inline Elements - HTML 4.01 var inline = makeMap( "a,abbr,acronym,applet,b,basefont,bdo,big,br,button,cite,code,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" ); // Elements that you can, intentionally, leave open // (and which close themselves) var closeSelf = makeMap( "colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr" ); // Attributes that have their values filled in disabled="disabled" var fillAttrs = makeMap( "checked,compact,declare,defer,disabled,ismap,multiple,nohref,noresize,noshade,nowrap,readonly,selected" ); // Special Elements (can contain anything) var special = makeMap( "script,style" ); var HTMLParser = function( html, handler ) { var index, chars, match, stack = [], last = html; stack.last = function() { return this[ this.length - 1 ]; }; while( html ) { chars = true; // Make sure we're not in a script or style element if( !stack.last() || !special[ stack.last() ] ) { // Comment, DOCTYPE INCLUDED if( html.indexOf( "<!--" ) == 0 ) { index = html.indexOf( "-->" ); if( index >= 0 ) { if( handler.comment ) handler.comment( html.substring( 4, index ) ); html = html.substring( index + 3 ); chars = false; } //doctype } else if( html.indexOf( "<!" ) == 0 ) { index = html.indexOf( ">" ); if( index >= 0 ) { if( handler.doctype ) handler.doctype( html.substring( 2, index ) ); html = html.substring( index + 1 ); chars = false; } //script } else if( html.indexOf( "<script" ) == 0 ) { index = html.indexOf( "</script>" ); if( index >= 0 ) { if( handler.script ) handler.script( html.substring( 7, index ) ); html = html.substring( index + 9 ); chars = false; } //style } else if( html.indexOf( "<style>" ) == 0 ) { index = html.indexOf( "</style>" ); if( index >= 0 ) { if( handler.style ) handler.style( html.substring( 7, index ) ); html = html.substring( index + 8 ); chars = false; } // end tag } else if( html.indexOf( "</" ) == 0 ) { match = html.match( endTag ); if( match ) { html = html.substring( match[ 0 ].length ); match[ 0 ].replace( endTag, parseEndTag ); chars = false; } // start tag } else if( html.indexOf( "<" ) == 0 ) { match = html.match( startTag ); if( match ) { html = html.substring( match[ 0 ].length ); match[ 0 ].replace( startTag, parseStartTag ); chars = false; } } if( chars ) { index = html.indexOf( "<" ); var text = index < 0 ? html : html.substring( 0, index ); html = index < 0 ? "" : html.substring( index ); if( handler.chars ) handler.chars( text ); } } else { html = html.replace( new RegExp( "(.*)<\/" + stack.last() + "[^>]*>" ), function( all, text ) { text = text.replace( /<!--(.*?)-->/g, "$1" ) .replace( /<!\[CDATA\[(.*?)]]>/g, "$1" ); if( handler.chars ) handler.chars( text ); return ""; }); parseEndTag( "", stack.last() ); } if( html == last ) throw "Parse Error: " + html; last = html; } // Clean up any remaining tags parseEndTag(); function parseStartTag( tag, tagName, rest, unary ) { if( block[ tagName ] ) { while( stack.last() && inline[ stack.last() ] ) { parseEndTag( "", stack.last() ); } } if( closeSelf[ tagName ] && stack.last() == tagName ) { parseEndTag( "", tagName ); } unary = empty[ tagName ] || !!unary; if( !unary ) stack.push( tagName ); if( handler.start ) { var attrs = []; rest.replace( attr, function( match, name ) { var value = arguments[ 2 ] ? arguments[ 2 ] : arguments[ 3 ] ? arguments[ 3 ] : arguments[ 4 ] ? arguments[ 4 ] : fillAttrs[ name ] ? name : ""; attrs[ name ] = value;//value.replace(/(^|[^\\])"/g, '$1\\\"') //"; //attrs.push({ // name: name, // value: value, // escaped: value.replace(/(^|[^\\])"/g, '$1\\\"') //" //}); }); if( handler.start ) handler.start( tagName, attrs, unary ); } } function parseEndTag( tag, tagName ) { // If no tag name is provided, clean shop if( !tagName ) var pos = 0; // Find the closest opened tag of the same type else for( var pos = stack.length - 1;pos >= 0;pos-- ) if( stack[ pos ] == tagName ) break; if( pos >= 0 ) { // Close all the open elements, up the stack for( var i = stack.length - 1;i >= pos;i-- ) if( handler.end ) handler.end( stack[ i ] ); // Remove the open elements from the stack stack.length = pos; } } }; var HTMLtoXML = function( html ) { var results = ""; HTMLParser( html, { start: function( tag, attrs, unary ) { results += "<" + tag; for( var i = 0;i < attrs.length;i++ ) results += " " + attrs[ i ].name + '="' + attrs[ i ].escaped + '"'; results += ( unary ? "/" : "" ) + ">"; }, end: function( tag ) { results += "</" + tag + ">"; }, chars: function( text ) { results += text; }, comment: function( text ) { results += "<!--" + text + "-->"; } }); return results; }; // this.HTMLtoDOM = function( html, doc ) { // // There can be only one of these elements // var one = makeMap( "html,head,body,title" ); // // Enforce a structure for the document // var structure = { // link: "head", // base: "head" // }; // if( !doc ) { // if( typeof DOMDocument != "undefined" ) // doc = new DOMDocument(); // else if( typeof document != "undefined" && document.implementation && document.implementation.createDocument ) // doc = document.implementation.createDocument( "", "", null ); // else if( typeof ActiveX != "undefined" ) // doc = new ActiveXObject( "Msxml.DOMDocument" ); // } else // doc = doc.ownerDocument || // doc.getOwnerDocument && doc.getOwnerDocument() || // doc; // var elems = [], // documentElement = doc.documentElement || // doc.getDocumentElement && doc.getDocumentElement(); // // If we're dealing with an empty document then we // // need to pre-populate it with the HTML document structure // if( !documentElement && doc.createEleme