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/** $Id: domLib.js 2321 2006-06-12 06:45:41Z dallen $ */

/*

 * Copyright 2002-2005 Dan Allen, Mojavelinux.com (dan.allen@mojavelinux.com)

 *

 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

// }}}

// {{{ intro

/**

 * Title: DOM Library Core

 * Version: 0.70

 *

 * Summary:

 * A set of commonly used functions that make it easier to create javascript

 * applications that rely on the DOM.

 *

 * Updated: 2005/05/17

 *

 * Maintainer: Dan Allen <dan.allen@mojavelinux.com>

 * Maintainer: Jason Rust <jrust@rustyparts.com>

 *

 * License: Apache 2.0

 */

// }}}

// {{{ global constants (DO NOT EDIT)

// -- Browser Detection --

var domLib_userAgent = navigator.userAgent.toLowerCase();

var domLib_isMac = navigator.appVersion.indexOf('Mac') != -1;

var domLib_isWin = domLib_userAgent.indexOf('windows') != -1;

// NOTE: could use window.opera for detecting Opera

var domLib_isOpera = domLib_userAgent.indexOf('opera') != -1;

var domLib_isOpera7up = domLib_userAgent.match(/opera.(7|8)/i);

var domLib_isSafari = domLib_userAgent.indexOf('safari') != -1;

var domLib_isKonq = domLib_userAgent.indexOf('konqueror') != -1;

// Both konqueror and safari use the khtml rendering engine

var domLib_isKHTML = (domLib_isKonq || domLib_isSafari || domLib_userAgent.indexOf('khtml') != -1);

var domLib_isIE50 = (domLib_isIE && domLib_userAgent.indexOf('msie 5.0') != -1);

var domLib_isIE55 = (domLib_isIE && domLib_userAgent.indexOf('msie 5.5') != -1);

var domLib_isIE5 = (domLib_isIE50 || domLib_isIE55);

// safari and konq may use string "khtml, like gecko", so check for destinctive /

var domLib_isGecko = domLib_userAgent.indexOf('gecko/') != -1;

var domLib_isMacIE = (domLib_isIE && domLib_isMac);

var domLib_isIE55up = domLib_isIE5up && !domLib_isIE50 && !domLib_isMacIE;

var domLib_isIE6up = domLib_isIE55up && !domLib_isIE55;

// -- Browser Abilities --

var domLib_standardsMode = (document.compatMode && document.compatMode == 'CSS1Compat');

var domLib_useLibrary = (domLib_isOpera7up || domLib_isKHTML || domLib_isIE5up || domLib_isGecko || domLib_isMacIE || document.defaultView);

// fixed in Konq3.2

var domLib_hasBrokenTimeout = (domLib_isMacIE || (domLib_isKonq && domLib_userAgent.match(/konqueror\/3.([2-9])/) == null));

var domLib_canFade = (domLib_isGecko || domLib_isIE || domLib_isSafari || domLib_isOpera);

var domLib_canDrawOverSelect = (domLib_isMac || domLib_isOpera || domLib_isGecko);

var domLib_canDrawOverFlash = (domLib_isMac || domLib_isWin);

// -- Event Variables --

var domLib_eventTarget = domLib_isIE ? 'srcElement' : 'currentTarget';

var domLib_eventButton = domLib_isIE ? 'button' : 'which';

var domLib_eventTo = domLib_isIE ? 'toElement' : 'relatedTarget';

var domLib_stylePointer = domLib_isIE ? 'hand' : 'pointer';

// NOTE: a bug exists in Opera that prevents maxWidth from being set to 'none', so we make it huge

var domLib_styleNoMaxWidth = domLib_isOpera ? '10000px' : 'none';

var domLib_hidePosition = '-1000px';

var domLib_scrollbarWidth = 14;

var domLib_autoId = 1;

var domLib_zIndex = 100;

// -- Detection --

var domLib_collisionElements;

var domLib_collisionsCached = false;

var domLib_timeoutStateId = 0;

// }}}

// {{{ DOM enhancements

if (!document.ELEMENT_NODE)

{

	document.ELEMENT_NODE = 1;

	document.ATTRIBUTE_NODE = 2;

	document.TEXT_NODE = 3;

	document.DOCUMENT_NODE = 9;

	document.DOCUMENT_FRAGMENT_NODE = 11;

}

function domLib_clone(obj)

{

	var copy = {};

	for (var i in obj)

	{

		var value = obj[i];

		try

		{

			if (value != null && typeof(value) == 'object' && value != window && !value.nodeType)

			{

				copy[i] = domLib_clone(value);

			}

			else

			{

				copy[i] = value;

			}

		}

		catch(e)

		{

			copy[i] = value;

		}

	}

	return copy;

}

// }}}

	this.length = 0;

	this.numericLength = 0; 

	this.elementData = [];

	for (var i = 0; i < arguments.length; i += 2)

	{

		if (typeof(arguments[i + 1]) != 'undefined')

		{

			this.elementData[arguments[i]] = arguments[i + 1];

			this.length++;

			if (arguments[i] == parseInt(arguments[i])) 

			{

				this.numericLength++;

			}

		}

	}

}

// using prototype as opposed to inner functions saves on memory 

	if (typeof(this.elementData[in_key]) != 'undefined') {

		return this.elementData[in_key];

	}

	return null;

}

	if (typeof(in_value) != 'undefined')

	{

		if (typeof(this.elementData[in_key]) == 'undefined')

		{

			this.length++;

			if (in_key == parseInt(in_key)) 

			{

				this.numericLength++;

			}

		}

		return this.elementData[in_key] = in_value;

	}

	return false;

}

	var tmp_value;

	if (typeof(this.elementData[in_key]) != 'undefined')

	{

		this.length--;

		if (in_key == parseInt(in_key)) 

		{

			this.numericLength--;

		}

		tmp_value = this.elementData[in_key];

		delete this.elementData[in_key];

	}

	return tmp_value;

}

	return this.length;

}

	return typeof(this.elementData[in_key]) != 'undefined';

}

	for (var tmp_key in this.elementData) 

	{

		if (this.elementData[tmp_key] == in_obj) 

		{

			return tmp_key;

		}

	}

	return null;

}

	for (var tmp_key in in_hash.elementData) 

	{

		if (typeof(this.elementData[tmp_key]) == 'undefined') 

		{

			this.length++;

			if (tmp_key == parseInt(tmp_key)) 

			{

				this.numericLength++;

			}

		}

		this.elementData[tmp_key] = in_hash.elementData[tmp_key];

	}

}

	if (this.length != in_hash.length) 

	{

		return false;

	}

	for (var tmp_key in this.elementData) 

	{

		if (this.elementData[tmp_key] != in_hash.elementData[tmp_key]) 

		{

			return false;

		}

	}

	return true;

}

// }}}

// {{{ domLib_isDescendantOf()

function domLib_isDescendantOf(in_object, in_ancestor, in_bannedTags)

{

	if (in_object == null)

	{

		return false;

	}

	if (in_object == in_ancestor)

	{

		return true;

	}

	if (typeof(in_bannedTags) != 'undefined' &&

		(',' + in_bannedTags.join(',') + ',').indexOf(',' + in_object.tagName + ',') != -1)

	{

		return false;

	}

	while (in_object != document.documentElement)

	{

		try

		{

			if ((tmp_object = in_object.offsetParent) && tmp_object == in_ancestor)

			{

				return true;

			}

			else if ((tmp_object = in_object.parentNode) == in_ancestor)

			{

				return true;

			}

			else

			{

				in_object = tmp_object;

			}

		}

		// in case we get some wierd error, assume we left the building

		catch(e)

		{

			return false;

		}

	}

	return false;

}

// }}}

// {{{ domLib_detectCollisions()

/**

 * For any given target element, determine if elements on the page

 * are colliding with it that do not obey the rules of z-index.

 */

function domLib_detectCollisions(in_object, in_recover, in_useCache)

{

	// the reason for the cache is that if the root menu is built before

	// the page is done loading, then it might not find all the elements.

	// so really the only time you don't use cache is when building the

	// menu as part of the page load

	if (!domLib_collisionsCached)

	{

		var tags = [];

		if (!domLib_canDrawOverFlash)

		{

			tags[tags.length] = 'object';

		}

		if (!domLib_canDrawOverSelect)

		{

			tags[tags.length] = 'select';

		}

		domLib_collisionElements = domLib_getElementsByTagNames(tags, true);

		domLib_collisionsCached = in_useCache;

	}

	// if we don't have a tip, then unhide selects

	if (in_recover)

	{

		for (var cnt = 0; cnt < domLib_collisionElements.length; cnt++)

		{

			var thisElement = domLib_collisionElements[cnt];

			if (!thisElement.hideList)

			{

			thisElement.hideList.remove(in_object.id);

			if (!thisElement.hideList.length)

			{

				domLib_collisionElements[cnt].style.visibility = 'visible';

				if (domLib_isKonq)

				{

					domLib_collisionElements[cnt].style.display = '';

				}

			}

		}

		return;

	}

	else if (domLib_collisionElements.length == 0)

	{

		return;

	}

	// okay, we have a tip, so hunt and destroy

	var objectOffsets = domLib_getOffsets(in_object);

	for (var cnt = 0; cnt < domLib_collisionElements.length; cnt++)

	{

		var thisElement = domLib_collisionElements[cnt];

		// if collision element is in active element, move on

		// WARNING: is this too costly?

		if (domLib_isDescendantOf(thisElement, in_object))

		{

			continue;

		}

		// konqueror only has trouble with multirow selects

		if (domLib_isKonq &&

			thisElement.tagName == 'SELECT' &&

			(thisElement.size <= 1 && !thisElement.multiple))

		{

			continue;

		}

		if (!thisElement.hideList)

		{

		var selectOffsets = domLib_getOffsets(thisElement); 

		var center2centerDistance = Math.sqrt(Math.pow(selectOffsets.get('leftCenter') - objectOffsets.get('leftCenter'), 2) + Math.pow(selectOffsets.get('topCenter') - objectOffsets.get('topCenter'), 2));

		var radiusSum = selectOffsets.get('radius') + objectOffsets.get('radius');

		// the encompassing circles are overlapping, get in for a closer look

		if (center2centerDistance < radiusSum)

		{

			// tip is left of select

			if ((objectOffsets.get('leftCenter') <= selectOffsets.get('leftCenter') && objectOffsets.get('right') < selectOffsets.get('left')) ||

			// tip is right of select

				(objectOffsets.get('leftCenter') > selectOffsets.get('leftCenter') && objectOffsets.get('left') > selectOffsets.get('right')) ||

			// tip is above select

				(objectOffsets.get('topCenter') <= selectOffsets.get('topCenter') && objectOffsets.get('bottom') < selectOffsets.get('top')) ||

			// tip is below select

				(objectOffsets.get('topCenter') > selectOffsets.get('topCenter') && objectOffsets.get('top') > selectOffsets.get('bottom')))

			{

				thisElement.hideList.remove(in_object.id);

				if (!thisElement.hideList.length)

				{

					thisElement.style.visibility = 'visible';

					if (domLib_isKonq)

					{

						thisElement.style.display = '';

					}

				}

			}

			else

			{

				thisElement.hideList.set(in_object.id, true);

				thisElement.style.visibility = 'hidden';

				if (domLib_isKonq)

				{

					thisElement.style.display = 'none';

				}

			}

		}

	}

}

// }}}

// {{{ domLib_getOffsets()

function domLib_getOffsets(in_object, in_preserveScroll)

{

	if (typeof(in_preserveScroll) == 'undefined') {

		in_preserveScroll = false;

	}

	var originalObject = in_object;

	var originalWidth = in_object.offsetWidth;

	var originalHeight = in_object.offsetHeight;

	var offsetLeft = 0;

	var offsetTop = 0;

	while (in_object)

	{

		offsetLeft += in_object.offsetLeft;

		offsetTop += in_object.offsetTop;

		in_object = in_object.offsetParent;

		// consider scroll offset of parent elements

		if (in_object && !in_preserveScroll)

		{

			offsetLeft -= in_object.scrollLeft;

			offsetTop -= in_object.scrollTop;

		}

	}

	// MacIE misreports the offsets (even with margin: 0 in body{}), still not perfect

	if (domLib_isMacIE) {

		offsetLeft += 10;

		offsetTop += 10;

	}

		'top',		offsetTop,

		'right',	offsetLeft + originalWidth,

		'bottom',	offsetTop + originalHeight,

		'leftCenter',	offsetLeft + originalWidth/2,

		'topCenter',	offsetTop + originalHeight/2,

		'radius',	Math.max(originalWidth, originalHeight) 

	);

}

// }}}

// {{{ domLib_setTimeout()

function domLib_setTimeout(in_function, in_timeout, in_args)

{

	if (typeof(in_args) == 'undefined')

	{

		in_args = [];

	}

	if (in_timeout == -1)

	{

		// timeout event is disabled

		return 0;

	}

	else if (in_timeout == 0)

	{

		in_function(in_args);

		return 0;

	}

	// must make a copy of the arguments so that we release the reference

	var args = domLib_clone(in_args);

	if (!domLib_hasBrokenTimeout)

	{

		return setTimeout(function() { in_function(args); }, in_timeout);

	}

	else

	{

		var id = domLib_timeoutStateId++;

		data.set('args', args);

		domLib_timeoutStates.set(id, data);

		data.set('timeoutId', setTimeout('domLib_timeoutStates.get(' + id + ').get(\'function\')(domLib_timeoutStates.get(' + id + ').get(\'args\')); domLib_timeoutStates.remove(' + id + ');', in_timeout));

		return id;

	}

}

// }}}

// {{{ domLib_clearTimeout()

function domLib_clearTimeout(in_id)

{

	if (!domLib_hasBrokenTimeout)

	{

		if (in_id > 0) {

			clearTimeout(in_id);

		}

	}

	else

	{

		if (domLib_timeoutStates.has(in_id))

		{

			clearTimeout(domLib_timeoutStates.get(in_id).get('timeoutId'))

			domLib_timeoutStates.remove(in_id);

		}

	}

}

// }}}

// {{{ domLib_getEventPosition()

function domLib_getEventPosition(in_eventObj)

{

	// IE varies depending on standard compliance mode

	if (domLib_isIE)

	{

		var doc = (domLib_standardsMode ? document.documentElement : document.body);

		// NOTE: events may fire before the body has been loaded

		if (doc)

		{

			eventPosition.set('x', in_eventObj.clientX + doc.scrollLeft);

			eventPosition.set('y', in_eventObj.clientY + doc.scrollTop);

			eventPosition.set('scrollX', doc.scrollLeft);

			eventPosition.set('scrollY', doc.scrollTop);

		}

	}

	else

	{

		eventPosition.set('x', in_eventObj.pageX);

		eventPosition.set('y', in_eventObj.pageY);

		eventPosition.set('scrollX', in_eventObj.pageX - in_eventObj.clientX);

		eventPosition.set('scrollY', in_eventObj.pageY - in_eventObj.clientY);

	}

	return eventPosition;

}

// }}}

// {{{ domLib_cancelBubble()

function domLib_cancelBubble(in_event)

{

	var eventObj = in_event ? in_event : window.event;

	eventObj.cancelBubble = true;

}

// }}}

// {{{ domLib_getIFrameReference()

function domLib_getIFrameReference(in_frame)

{

	if (domLib_isGecko || domLib_isIE)

	{

		return in_frame.frameElement;

	}

	else

	{

		// we could either do it this way or require an id on the frame

		// equivalent to the name

		var name = in_frame.name;

		if (!name || !in_frame.parent)

		{

			return null;

		}

		var candidates = in_frame.parent.document.getElementsByTagName('iframe');

		for (var i = 0; i < candidates.length; i++)

		{

			if (candidates[i].name == name)

			{

				return candidates[i];

			}

		}

		return null;

	}

}

// }}}

// {{{ domLib_getElementsByClass()

function domLib_getElementsByClass(in_class)

{

	var elements = domLib_isIE5 ? document.all : document.getElementsByTagName('*');	

	var matches = [];	

	var cnt = 0;

	for (var i = 0; i < elements.length; i++)

	{

		if ((" " + elements[i].className + " ").indexOf(" " + in_class + " ") != -1)

		{

			matches[cnt++] = elements[i];

		}

	}

	return matches;

}

// }}}

// {{{ domLib_getElementsByTagNames()

function domLib_getElementsByTagNames(in_list, in_excludeHidden)

{

	var elements = [];

	for (var i = 0; i < in_list.length; i++)

	{

		var matches = document.getElementsByTagName(in_list[i]);

		for (var j = 0; j < matches.length; j++)

		{

			// skip objects that have nested embeds, or else we get "flashing"

			if (matches[j].tagName == 'OBJECT' && domLib_isGecko)

			{

				var kids = matches[j].childNodes;

				var skip = false;

				for (var k = 0; k < kids.length; k++)

				{

					if (kids[k].tagName == 'EMBED')

					{

						skip = true;

						break;

					}

				}

				if (skip) continue;

			}

			if (in_excludeHidden && domLib_getComputedStyle(matches[j], 'visibility') == 'hidden')

			{

				continue;

			}

			elements[elements.length] = matches[j];	

		}

	}

	return elements;

}

// }}}

// {{{ domLib_getComputedStyle()

function domLib_getComputedStyle(in_obj, in_property)

{

	if (domLib_isIE)

	{

		var humpBackProp = in_property.replace(/-(.)/, function (a, b) { return b.toUpperCase(); });

		return eval('in_obj.currentStyle.' + humpBackProp);

	}

	// getComputedStyle() is broken in konqueror, so let's go for the style object

	else if (domLib_isKonq)

	{

		//var humpBackProp = in_property.replace(/-(.)/, function (a, b) { return b.toUpperCase(); });

		return eval('in_obj.style.' + in_property);

	}