ieemu.js

ajax source code .

/*----------------------------------------------------------------------------\
|                                   IE Emu                                    |
|-----------------------------------------------------------------------------|
|                         Created by Erik Arvidsson                           |
|                  (http://webfx.eae.net/contact.html#erik)                   |
|                      For WebFX (http://webfx.eae.net/)                      |
|-----------------------------------------------------------------------------|
| A emulation of Internet Explorer DHTML Object Model for Mozilla             |
|-----------------------------------------------------------------------------|
|                  Copyright (c) 1999 - 2004 Erik Arvidsson                   |
|-----------------------------------------------------------------------------|
| This software is provided "as is", without warranty of any kind, express or |
| implied, including  but not limited  to the warranties of  merchantability, |
| fitness for a particular purpose and noninfringement. In no event shall the |
| authors or  copyright  holders be  liable for any claim,  damages or  other |
| liability, whether  in an  action of  contract, tort  or otherwise, arising |
| from,  out of  or in  connection with  the software or  the  use  or  other |
| dealings in the software.                                                   |
| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| This  software is  available under the  three different licenses  mentioned |
| below.  To use this software you must chose, and qualify, for one of those. |
| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| The WebFX Non-Commercial License          http://webfx.eae.net/license.html |
| Permits  anyone the right to use the  software in a  non-commercial context |
| free of charge.                                                             |
| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| The WebFX Commercial license           http://webfx.eae.net/commercial.html |
| Permits the  license holder the right to use  the software in a  commercial |
| context. Such license must be specifically obtained, however it's valid for |
| any number of  implementations of the licensed software.                    |
| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| GPL - The GNU General Public License    http://www.gnu.org/licenses/gpl.txt |
| Permits anyone the right to use and modify the software without limitations |
| as long as proper  credits are given  and the original  and modified source |
| code are included. Requires  that the final product, software derivate from |
| the original  source or any  software  utilizing a GPL  component, such  as |
| this, is also licensed under the GPL license.                               |
| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| MPL - Mozilla Public License                    http://www.mozilla.org/MPL/ |
|                                                                             |
| The contents of this file are subject to the Mozilla Public License Version |
| 1.1 (the "License"); you may not use this file except in compliance with    |
| the License. You may obtain a copy of the License at                        |
| http://www.mozilla.org/MPL/                                                 |
|                                                                             |
| Software distributed under the License is distributed on an "AS IS" basis,  |
| WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License    |
| for the specific language governing rights and limitations under the        |
| License.                                                                    |
|                                                                             |
| The Original Code is IE Emu.                                                |
|                                                                             |
| The Initial Developer of the Original Code is Erik Arvidsson.               |
| Portions created by the Initial Developer are Copyright (C) 1999-2004       |
| the Initial Developer. All Rights Reserved.                                 |
|                                                                             |
| Contributor(s):                                                             |
|                                                                             |
|-----------------------------------------------------------------------------|
| 2002-??-?? | First version                                                  |
| 2004-04-13 | Impreved currentStyle emulation. Updated to not that the code  |
|            |is available under GPL, MPL or WebFX Non-Commercial License     |
|-----------------------------------------------------------------------------|
| Created 2002-??-?? | All changes are in the log above. | Updated 2004-04-13 |
\----------------------------------------------------------------------------*/


if (Browser.isMozilla) { // set up ie environment for Moz
	
	extendEventObject();
	emulateAttachEvent();
	emulateEventHandlers(["click", "dblclick", "mouseover", "mouseout",
							"mousedown", "mouseup", "mousemove",
							"keydown", "keypress", "keyup"]);
	emulateCurrentStyle();
	/*emulateDocumentAll();
	emulateElement()
	*/

	// It is better to use a constant for event.button
	Event.LEFT = 0;
	Event.MIDDLE = 1;
	Event.RIGHT = 2;
}
else {
	Event = {};
	// IE is returning wrong button number
	Event.LEFT = 1;
	Event.MIDDLE = 4;
	Event.RIGHT = 2;
}



/*
 * Extends the event object with srcElement, cancelBubble, returnValue,
 * fromElement and toElement
 */
function extendEventObject() {
	Event.prototype.__defineSetter__("returnValue", function (b) {
		if (!b) this.preventDefault();
		return b;
	});

	Event.prototype.__defineSetter__("cancelBubble", function (b) {
		if (b) this.stopPropagation();
		return b;
	});

	Event.prototype.__defineGetter__("srcElement", function () {
		var node = this.target;
		while (node.nodeType != 1) node = node.parentNode;
		return node;
	});

	Event.prototype.__defineGetter__("fromElement", function () {
		var node;
		if (this.type == "mouseover")
			node = this.relatedTarget;
		else if (this.type == "mouseout")
			node = this.target;
		if (!node) return;
		while (node.nodeType != 1) node = node.parentNode;
		return node;
	});

	Event.prototype.__defineGetter__("toElement", function () {
		var node;
		if (this.type == "mouseout")
			node = this.relatedTarget;
		else if (this.type == "mouseover")
			node = this.target;
		if (!node) return;
		while (node.nodeType != 1) node = node.parentNode;
		return node;
	});

	Event.prototype.__defineGetter__("offsetX", function () {
		return this.layerX;
	});
	Event.prototype.__defineGetter__("offsetY", function () {
		return this.layerY;
	});
}

/*
 * Emulates element.attachEvent as well as detachEvent
 */
function emulateAttachEvent() {
	HTMLDocument.prototype.attachEvent =
	HTMLElement.prototype.attachEvent = function (sType, fHandler) {
		var shortTypeName = sType.replace(/on/, "");
		fHandler._ieEmuEventHandler = function (e) {
			window.event = e;
			return fHandler();
		};
		this.addEventListener(shortTypeName, fHandler._ieEmuEventHandler, false);
	};

	HTMLDocument.prototype.detachEvent =
	HTMLElement.prototype.detachEvent = function (sType, fHandler) {
		var shortTypeName = sType.replace(/on/, "");
		if (typeof fHandler._ieEmuEventHandler == "function")
			this.removeEventListener(shortTypeName, fHandler._ieEmuEventHandler, false);
		else
			this.removeEventListener(shortTypeName, fHandler, true);
	};
}

/*
 * This function binds the event object passed along in an
 * event to window.event
 */
function emulateEventHandlers(eventNames) {
	for (var i = 0; i < eventNames.length; i++) {
		document.addEventListener(eventNames[i], function (e) {
			window.event = e;
		}, true);	// using capture
	}
}

/*
 * Simple emulation of document.all
 * this one is far from complete. Be cautious
 */

function emulateAllModel() {
	var allGetter = function () {
		var a = this.getElementsByTagName("*");
		var node = this;
		a.tags = function (sTagName) {
			return node.getElementsByTagName(sTagName);
		};
		return a;
	};
	HTMLDocument.prototype.__defineGetter__("all", allGetter);
	HTMLElement.prototype.__defineGetter__("all", allGetter);
}

function extendElementModel() {
	HTMLElement.prototype.__defineGetter__("parentElement", function () {
		if (this.parentNode == this.ownerDocument) return null;
		return this.parentNode;
	});

	HTMLElement.prototype.__defineGetter__("children", function () {
		var tmp = [];
		var j = 0;
		var n;
		for (var i = 0; i < this.childNodes.length; i++) {
			n = this.childNodes[i];
			if (n.nodeType == 1) {
				tmp[j++] = n;
				if (n.name) {	// named children
					if (!tmp[n.name])
						tmp[n.name] = [];
					tmp[n.name][tmp[n.name].length] = n;
				}
				if (n.id)		// child with id
					tmp[n.id] = n
			}
		}
		return tmp;
	});

	HTMLElement.prototype.contains = function (oEl) {
		if (oEl == this) return true;
		if (oEl == null) return false;
		return this.contains(oEl.parentNode);
	};
}

function emulateCurrentStyle() {
	HTMLElement.prototype.__defineGetter__("currentStyle", function () {
		return this.ownerDocument.defaultView.getComputedStyle(this, null);
		/*
		var cs = {};
		var el = this;
		for (var i = 0; i < properties.length; i++) {
			cs.__defineGetter__(properties[i], encapsulateObjects(el, properties[i]));
		}
		return cs;
		*/
	});
}

function emulateHTMLModel() {

	// This function is used to generate a html string for the text properties/methods
	// It replaces '\n' with "<BR"> as well as fixes consecutive white spaces
	// It also repalaces some special characters
	function convertTextToHTML(s) {
		s = s.replace(/\&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;").replace(/\n/g, "<BR>");
		while (/\s\s/.test(s))
			s = s.replace(/\s\s/, "&nbsp; ");
		return s.replace(/\s/g, " ");
	}

	HTMLElement.prototype.insertAdjacentHTML = function (sWhere, sHTML) {
		var df;	// : DocumentFragment
		var r = this.ownerDocument.createRange();

		switch (String(sWhere).toLowerCase()) {
			case "beforebegin":
				r.setStartBefore(this);
				df = r.createContextualFragment(sHTML);
				this.parentNode.insertBefore(df, this);
				break;

			case "afterbegin":
				r.selectNodeContents(this);
				r.collapse(true);
				df = r.createContextualFragment(sHTML);
				this.insertBefore(df, this.firstChild);
				break;

			case "beforeend":
				r.selectNodeContents(this);
				r.collapse(false);
				df = r.createContextualFragment(sHTML);
				this.appendChild(df);
				break;

			case "afterend":
				r.setStartAfter(this);
				df = r.createContextualFragment(sHTML);
				this.parentNode.insertBefore(df, this.nextSibling);
				break;
		}
	};

	HTMLElement.prototype.__defineSetter__("outerHTML", function (sHTML) {
	   var r = this.ownerDocument.createRange();
	   r.setStartBefore(this);
	   var df = r.createContextualFragment(sHTML);
	   this.parentNode.replaceChild(df, this);

	   return sHTML;
	});

	HTMLElement.prototype.__defineGetter__("canHaveChildren", function () {
		switch (this.tagName) {
			case "AREA":
			case "BASE":
			case "BASEFONT":
			case "COL":
			case "FRAME":
			case "HR":
			case "IMG":
			case "BR":
			case "INPUT":
			case "ISINDEX":
			case "LINK":
			case "META":
			case "PARAM":
				return false;
		}
		return true;
	});

	HTMLElement.prototype.__defineGetter__("outerHTML", function () {
		var attr, attrs = this.attributes;
		var str = "<" + this.tagName;
		for (var i = 0; i < attrs.length; i++) {
			attr = attrs[i];
			if (attr.specified)
				str += " " + attr.name + '="' + attr.value + '"';
		}
		if (!this.canHaveChildren)
			return str + ">";

		return str + ">" + this.innerHTML + "</" + this.tagName + ">";
	});


	HTMLElement.prototype.__defineSetter__("innerText", function (sText) {
		this.innerHTML = convertTextToHTML(sText);
		return sText;
	});

	var tmpGet;
	HTMLElement.prototype.__defineGetter__("innerText", tmpGet = function () {
		var r = this.ownerDocument.createRange();
		r.selectNodeContents(this);
		return r.toString();
	});

	HTMLElement.prototype.__defineSetter__("outerText", function (sText) {
		this.outerHTML = convertTextToHTML(sText);
		return sText;
	});
	HTMLElement.prototype.__defineGetter__("outerText", tmpGet);

	HTMLElement.prototype.insertAdjacentText = function (sWhere, sText) {
		this.insertAdjacentHTML(sWhere, convertTextToHTML(sText));
	};
}