text: var Tokenizer = require("./Tokenizer.js");
  
  /*
  	Options:
  
  	xmlMode: Special behavior for script/style tags (true 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, td:true },
  	body    : { head:true, link:true, script:true },
  	li      : { li:true },
  	p       : { 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
  };
  
  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;
  
  	this._tokenizer = new Tokenizer(this._options, this);
  }
  
  require("util").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._index;
  };
  
  //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 = [];
  };
  
  //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;
  