| var Tokenizer = require("./Tokenizer.js"); |
| |
| /* |
| Options: |
| |
| xmlMode: Disables the special behavior for script/style tags (false by default) |
| lowerCaseAttributeNames: call .toLowerCase for each attribute name (true if xmlMode is `false`) |
| lowerCaseTags: call .toLowerCase for each tag name (true if xmlMode is `false`) |
| */ |
| |
| /* |
| Callbacks: |
| |
| oncdataend, |
| oncdatastart, |
| onclosetag, |
| oncomment, |
| oncommentend, |
| onerror, |
| onopentag, |
| onprocessinginstruction, |
| onreset, |
| ontext |
| */ |
| |
| var formTags = { |
| input: true, |
| option: true, |
| optgroup: true, |
| select: true, |
| button: true, |
| datalist: true, |
| textarea: true |
| }; |
| |
| var openImpliesClose = { |
| tr : { tr:true, th:true, td:true }, |
| th : { th:true }, |
| td : { thead:true, th:true, td:true }, |
| body : { head:true, link:true, script:true }, |
| li : { li:true }, |
| p : { p:true }, |
| h1 : { p:true }, |
| h2 : { p:true }, |
| h3 : { p:true }, |
| h4 : { p:true }, |
| h5 : { p:true }, |
| h6 : { p:true }, |
| select : formTags, |
| input : formTags, |
| output : formTags, |
| button : formTags, |
| datalist: formTags, |
| textarea: formTags, |
| option : { option:true }, |
| optgroup: { optgroup:true } |
| }; |
| |
| var voidElements = { |
| __proto__: null, |
| area: true, |
| base: true, |
| basefont: true, |
| br: true, |
| col: true, |
| command: true, |
| embed: true, |
| frame: true, |
| hr: true, |
| img: true, |
| input: true, |
| isindex: true, |
| keygen: true, |
| link: true, |
| meta: true, |
| param: true, |
| source: true, |
| track: true, |
| wbr: true, |
| |
| //common self closing svg elements |
| path: true, |
| circle: true, |
| ellipse: true, |
| line: true, |
| rect: true, |
| use: true, |
| stop: true, |
| polyline: true, |
| polygon: true |
| }; |
| |
| var re_nameEnd = /\s|\//; |
| |
| function Parser(cbs, options){ |
| this._options = options || {}; |
| this._cbs = cbs || {}; |
| |
| this._tagname = ""; |
| this._attribname = ""; |
| this._attribvalue = ""; |
| this._attribs = null; |
| this._stack = []; |
| |
| this.startIndex = 0; |
| this.endIndex = null; |
| |
| this._lowerCaseTagNames = "lowerCaseTags" in this._options ? |
| !!this._options.lowerCaseTags : |
| !this._options.xmlMode; |
| this._lowerCaseAttributeNames = "lowerCaseAttributeNames" in this._options ? |
| !!this._options.lowerCaseAttributeNames : |
| !this._options.xmlMode; |
| |
| if(this._options.Tokenizer) { |
| Tokenizer = this._options.Tokenizer; |
| } |
| this._tokenizer = new Tokenizer(this._options, this); |
| |
| if(this._cbs.onparserinit) this._cbs.onparserinit(this); |
| } |
| |
| require("inherits")(Parser, require("events").EventEmitter); |
| |
| Parser.prototype._updatePosition = function(initialOffset){ |
| if(this.endIndex === null){ |
| if(this._tokenizer._sectionStart <= initialOffset){ |
| this.startIndex = 0; |
| } else { |
| this.startIndex = this._tokenizer._sectionStart - initialOffset; |
| } |
| } |
| else this.startIndex = this.endIndex + 1; |
| this.endIndex = this._tokenizer.getAbsoluteIndex(); |
| }; |
| |
| //Tokenizer event handlers |
| Parser.prototype.ontext = function(data){ |
| this._updatePosition(1); |
| this.endIndex--; |
| |
| if(this._cbs.ontext) this._cbs.ontext(data); |
| }; |
| |
| Parser.prototype.onopentagname = function(name){ |
| if(this._lowerCaseTagNames){ |
| name = name.toLowerCase(); |
| } |
| |
| this._tagname = name; |
| |
| if(!this._options.xmlMode && name in openImpliesClose) { |
| for( |
| var el; |
| (el = this._stack[this._stack.length - 1]) in openImpliesClose[name]; |
| this.onclosetag(el) |
| ); |
| } |
| |
| if(this._options.xmlMode || !(name in voidElements)){ |
| this._stack.push(name); |
| } |
| |
| if(this._cbs.onopentagname) this._cbs.onopentagname(name); |
| if(this._cbs.onopentag) this._attribs = {}; |
| }; |
| |
| Parser.prototype.onopentagend = function(){ |
| this._updatePosition(1); |
| |
| if(this._attribs){ |
| if(this._cbs.onopentag) this._cbs.onopentag(this._tagname, this._attribs); |
| this._attribs = null; |
| } |
| |
| if(!this._options.xmlMode && this._cbs.onclosetag && this._tagname in voidElements){ |
| this._cbs.onclosetag(this._tagname); |
| } |
| |
| this._tagname = ""; |
| }; |
| |
| Parser.prototype.onclosetag = function(name){ |
| this._updatePosition(1); |
| |
| if(this._lowerCaseTagNames){ |
| name = name.toLowerCase(); |
| } |
| |
| if(this._stack.length && (!(name in voidElements) || this._options.xmlMode)){ |
| var pos = this._stack.lastIndexOf(name); |
| if(pos !== -1){ |
| if(this._cbs.onclosetag){ |
| pos = this._stack.length - pos; |
| while(pos--) this._cbs.onclosetag(this._stack.pop()); |
| } |
| else this._stack.length = pos; |
| } else if(name === "p" && !this._options.xmlMode){ |
| this.onopentagname(name); |
| this._closeCurrentTag(); |
| } |
| } else if(!this._options.xmlMode && (name === "br" || name === "p")){ |
| this.onopentagname(name); |
| this._closeCurrentTag(); |
| } |
| }; |
| |
| Parser.prototype.onselfclosingtag = function(){ |
| if(this._options.xmlMode || this._options.recognizeSelfClosing){ |
| this._closeCurrentTag(); |
| } else { |
| this.onopentagend(); |
| } |
| }; |
| |
| Parser.prototype._closeCurrentTag = function(){ |
| var name = this._tagname; |
| |
| this.onopentagend(); |
| |
| //self-closing tags will be on the top of the stack |
| //(cheaper check than in onclosetag) |
| if(this._stack[this._stack.length - 1] === name){ |
| if(this._cbs.onclosetag){ |
| this._cbs.onclosetag(name); |
| } |
| this._stack.pop(); |
| } |
| }; |
| |
| Parser.prototype.onattribname = function(name){ |
| if(this._lowerCaseAttributeNames){ |
| name = name.toLowerCase(); |
| } |
| this._attribname = name; |
| }; |
| |
| Parser.prototype.onattribdata = function(value){ |
| this._attribvalue += value; |
| }; |
| |
| Parser.prototype.onattribend = function(){ |
| if(this._cbs.onattribute) this._cbs.onattribute(this._attribname, this._attribvalue); |
| if( |
| this._attribs && |
| !Object.prototype.hasOwnProperty.call(this._attribs, this._attribname) |
| ){ |
| this._attribs[this._attribname] = this._attribvalue; |
| } |
| this._attribname = ""; |
| this._attribvalue = ""; |
| }; |
| |
| Parser.prototype._getInstructionName = function(value){ |
| var idx = value.search(re_nameEnd), |
| name = idx < 0 ? value : value.substr(0, idx); |
| |
| if(this._lowerCaseTagNames){ |
| name = name.toLowerCase(); |
| } |
| |
| return name; |
| }; |
| |
| Parser.prototype.ondeclaration = function(value){ |
| if(this._cbs.onprocessinginstruction){ |
| var name = this._getInstructionName(value); |
| this._cbs.onprocessinginstruction("!" + name, "!" + value); |
| } |
| }; |
| |
| Parser.prototype.onprocessinginstruction = function(value){ |
| if(this._cbs.onprocessinginstruction){ |
| var name = this._getInstructionName(value); |
| this._cbs.onprocessinginstruction("?" + name, "?" + value); |
| } |
| }; |
| |
| Parser.prototype.oncomment = function(value){ |
| this._updatePosition(4); |
| |
| if(this._cbs.oncomment) this._cbs.oncomment(value); |
| if(this._cbs.oncommentend) this._cbs.oncommentend(); |
| }; |
| |
| Parser.prototype.oncdata = function(value){ |
| this._updatePosition(1); |
| |
| if(this._options.xmlMode || this._options.recognizeCDATA){ |
| if(this._cbs.oncdatastart) this._cbs.oncdatastart(); |
| if(this._cbs.ontext) this._cbs.ontext(value); |
| if(this._cbs.oncdataend) this._cbs.oncdataend(); |
| } else { |
| this.oncomment("[CDATA[" + value + "]]"); |
| } |
| }; |
| |
| Parser.prototype.onerror = function(err){ |
| if(this._cbs.onerror) this._cbs.onerror(err); |
| }; |
| |
| Parser.prototype.onend = function(){ |
| if(this._cbs.onclosetag){ |
| for( |
| var i = this._stack.length; |
| i > 0; |
| this._cbs.onclosetag(this._stack[--i]) |
| ); |
| } |
| if(this._cbs.onend) this._cbs.onend(); |
| }; |
| |
| |
| //Resets the parser to a blank state, ready to parse a new HTML document |
| Parser.prototype.reset = function(){ |
| if(this._cbs.onreset) this._cbs.onreset(); |
| this._tokenizer.reset(); |
| |
| this._tagname = ""; |
| this._attribname = ""; |
| this._attribs = null; |
| this._stack = []; |
| |
| if(this._cbs.onparserinit) this._cbs.onparserinit(this); |
| }; |
| |
| //Parses a complete HTML document and pushes it to the handler |
| Parser.prototype.parseComplete = function(data){ |
| this.reset(); |
| this.end(data); |
| }; |
| |
| Parser.prototype.write = function(chunk){ |
| this._tokenizer.write(chunk); |
| }; |
| |
| Parser.prototype.end = function(chunk){ |
| this._tokenizer.end(chunk); |
| }; |
| |
| Parser.prototype.pause = function(){ |
| this._tokenizer.pause(); |
| }; |
| |
| Parser.prototype.resume = function(){ |
| this._tokenizer.resume(); |
| }; |
| |
| //alias for backwards compat |
| Parser.prototype.parseChunk = Parser.prototype.write; |
| Parser.prototype.done = Parser.prototype.end; |
| |
| module.exports = Parser; |