08-27-周三_17-09-29

node_modules/domhandler/index.js

@@ -0,0 +1,217 @@
+var ElementType = require("domelementtype");
+
+var re_whitespace = /\s+/g;
+var NodePrototype = require("./lib/node");
+var ElementPrototype = require("./lib/element");
+
+function DomHandler(callback, options, elementCB){
+	if(typeof callback === "object"){
+		elementCB = options;
+		options = callback;
+		callback = null;
+	} else if(typeof options === "function"){
+		elementCB = options;
+		options = defaultOpts;
+	}
+	this._callback = callback;
+	this._options = options || defaultOpts;
+	this._elementCB = elementCB;
+	this.dom = [];
+	this._done = false;
+	this._tagStack = [];
+	this._parser = this._parser || null;
+}
+
+//default options
+var defaultOpts = {
+	normalizeWhitespace: false, //Replace all whitespace with single spaces
+	withStartIndices: false, //Add startIndex properties to nodes
+	withEndIndices: false, //Add endIndex properties to nodes
+};
+
+DomHandler.prototype.onparserinit = function(parser){
+	this._parser = parser;
+};
+
+//Resets the handler back to starting state
+DomHandler.prototype.onreset = function(){
+	DomHandler.call(this, this._callback, this._options, this._elementCB);
+};
+
+//Signals the handler that parsing is done
+DomHandler.prototype.onend = function(){
+	if(this._done) return;
+	this._done = true;
+	this._parser = null;
+	this._handleCallback(null);
+};
+
+DomHandler.prototype._handleCallback =
+DomHandler.prototype.onerror = function(error){
+	if(typeof this._callback === "function"){
+		this._callback(error, this.dom);
+	} else {
+		if(error) throw error;
+	}
+};
+
+DomHandler.prototype.onclosetag = function(){
+	//if(this._tagStack.pop().name !== name) this._handleCallback(Error("Tagname didn't match!"));
+	
+	var elem = this._tagStack.pop();
+
+	if(this._options.withEndIndices && elem){
+		elem.endIndex = this._parser.endIndex;
+	}
+
+	if(this._elementCB) this._elementCB(elem);
+};
+
+DomHandler.prototype._createDomElement = function(properties){
+	if (!this._options.withDomLvl1) return properties;
+
+	var element;
+	if (properties.type === "tag") {
+		element = Object.create(ElementPrototype);
+	} else {
+		element = Object.create(NodePrototype);
+	}
+
+	for (var key in properties) {
+		if (properties.hasOwnProperty(key)) {
+			element[key] = properties[key];
+		}
+	}
+
+	return element;
+};
+
+DomHandler.prototype._addDomElement = function(element){
+	var parent = this._tagStack[this._tagStack.length - 1];
+	var siblings = parent ? parent.children : this.dom;
+	var previousSibling = siblings[siblings.length - 1];
+
+	element.next = null;
+
+	if(this._options.withStartIndices){
+		element.startIndex = this._parser.startIndex;
+	}
+	if(this._options.withEndIndices){
+		element.endIndex = this._parser.endIndex;
+	}
+
+	if(previousSibling){
+		element.prev = previousSibling;
+		previousSibling.next = element;
+	} else {
+		element.prev = null;
+	}
+
+	siblings.push(element);
+	element.parent = parent || null;
+};
+
+DomHandler.prototype.onopentag = function(name, attribs){
+	var properties = {
+		type: name === "script" ? ElementType.Script : name === "style" ? ElementType.Style : ElementType.Tag,
+		name: name,
+		attribs: attribs,
+		children: []
+	};
+
+	var element = this._createDomElement(properties);
+
+	this._addDomElement(element);
+
+	this._tagStack.push(element);
+};
+
+DomHandler.prototype.ontext = function(data){
+	//the ignoreWhitespace is officially dropped, but for now,
+	//it's an alias for normalizeWhitespace
+	var normalize = this._options.normalizeWhitespace || this._options.ignoreWhitespace;
+
+	var lastTag;
+
+	if(!this._tagStack.length && this.dom.length && (lastTag = this.dom[this.dom.length-1]).type === ElementType.Text){
+		if(normalize){
+			lastTag.data = (lastTag.data + data).replace(re_whitespace, " ");
+		} else {
+			lastTag.data += data;
+		}
+	} else {
+		if(
+			this._tagStack.length &&
+			(lastTag = this._tagStack[this._tagStack.length - 1]) &&
+			(lastTag = lastTag.children[lastTag.children.length - 1]) &&
+			lastTag.type === ElementType.Text
+		){
+			if(normalize){
+				lastTag.data = (lastTag.data + data).replace(re_whitespace, " ");
+			} else {
+				lastTag.data += data;
+			}
+		} else {
+			if(normalize){
+				data = data.replace(re_whitespace, " ");
+			}
+
+			var element = this._createDomElement({
+				data: data,
+				type: ElementType.Text
+			});
+
+			this._addDomElement(element);
+		}
+	}
+};
+
+DomHandler.prototype.oncomment = function(data){
+	var lastTag = this._tagStack[this._tagStack.length - 1];
+
+	if(lastTag && lastTag.type === ElementType.Comment){
+		lastTag.data += data;
+		return;
+	}
+
+	var properties = {
+		data: data,
+		type: ElementType.Comment
+	};
+
+	var element = this._createDomElement(properties);
+
+	this._addDomElement(element);
+	this._tagStack.push(element);
+};
+
+DomHandler.prototype.oncdatastart = function(){
+	var properties = {
+		children: [{
+			data: "",
+			type: ElementType.Text
+		}],
+		type: ElementType.CDATA
+	};
+
+	var element = this._createDomElement(properties);
+
+	this._addDomElement(element);
+	this._tagStack.push(element);
+};
+
+DomHandler.prototype.oncommentend = DomHandler.prototype.oncdataend = function(){
+	this._tagStack.pop();
+};
+
+DomHandler.prototype.onprocessinginstruction = function(name, data){
+	var element = this._createDomElement({
+		name: name,
+		data: data,
+		type: ElementType.Directive
+	});
+
+	this._addDomElement(element);
+};
+
+module.exports = DomHandler;