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build/node_modules/htmlparser2/lib/Parser.js

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+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;
+
+	this._tokenizer = new Tokenizer(this._options, this);
+
+	if(this._cbs.onparserinit) this._cbs.onparserinit(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.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;