/* SpryAccordion.js - Revision: Spry Preview Release 1.4 */

// Copyright (c) 2006. Adobe Systems Incorporated.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//   * Redistributions of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
//   * Redistributions in binary form must reproduce the above copyright notice,
//     this list of conditions and the following disclaimer in the documentation
//     and/or other materials provided with the distribution.
//   * Neither the name of Adobe Systems Incorporated nor the names of its
//     contributors may be used to endorse or promote products derived from this
//     software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.

var Spry;
if (!Spry) Spry = {};
if (!Spry.Widget) Spry.Widget = {};

Spry.Widget.Accordion = function(element, opts)
{

	this.element = this.getElement(element);
	this.defaultPanel = -1;
	this.hoverClass = "AccordionPanelTabHover";
	this.openClass = "AccordionPanelOpen";
	this.closedClass = "AccordionPanelClosed";
	this.focusedClass = "AccordionFocused";
	this.enableAnimation = true;
	this.enableKeyboardNavigation = true;
	this.currentPanel = null;
	this.animator = null;
	this.hasFocus = null;
	//this.duration = 500;

	this.previousPanelKeyCode = Spry.Widget.Accordion.KEY_UP;
	this.nextPanelKeyCode = Spry.Widget.Accordion.KEY_DOWN;

	this.useFixedPanelHeights = false;
	this.fixedPanelHeight = 0;

	Spry.Widget.Accordion.setOptions(this, opts, true);
this.attachBehaviors();
};


Spry.Widget.Accordion.prototype.getElement = function(ele)
{
	if (ele && typeof ele == "string")
		return document.getElementById(ele);
	return ele;
};

Spry.Widget.Accordion.prototype.addClassName = function(ele, className)
{
	if (!ele || !className || (ele.className && ele.className.search(new RegExp("\\b" + className + "\\b")) != -1))
		return;
	ele.className += (ele.className ? " " : "") + className;
};

Spry.Widget.Accordion.prototype.removeClassName = function(ele, className)
{
	if (!ele || !className || (ele.className && ele.className.search(new RegExp("\\b" + className + "\\b")) == -1))
		return;
	ele.className = ele.className.replace(new RegExp("\\s*\\b" + className + "\\b", "g"), "");
};

Spry.Widget.Accordion.setOptions = function(obj, optionsObj, ignoreUndefinedProps)
{
	if (!optionsObj)
		return;
	for (var optionName in optionsObj)
	{
		if (ignoreUndefinedProps && optionsObj[optionName] == undefined)
			continue;
		obj[optionName] = optionsObj[optionName];
	}
};

Spry.Widget.Accordion.prototype.onPanelTabMouseOver = function(e, panel)
{
	if (panel)
		this.addClassName(this.getPanelTab(panel), this.hoverClass);
		return false;
};

Spry.Widget.Accordion.prototype.onPanelTabMouseOut = function(e, panel)
{
	if (panel)
		this.removeClassName(this.getPanelTab(panel), this.hoverClass);
		return false;
};

Spry.Widget.Accordion.prototype.openPanel = function (elementOrIndex) {
    var panelA = this.currentPanel;
    var panelB;
    if (typeof elementOrIndex == "number") {
        panelB = this.getPanels()[elementOrIndex];
    } else {
        panelB = this.getElement(elementOrIndex);
    }
    if (!panelB || panelA == panelB) {
        return null;
    }
    var contentA = panelA ? this.getPanelContent(panelA) : null;
    var contentB = this.getPanelContent(panelB);
    if (!contentB) {
        return null;
    }
    if (this.useFixedPanelHeights && !this.fixedPanelHeight) {
        this.fixedPanelHeight = contentA.offsetHeight ? contentA.offsetHeight : contentA.scrollHeight;
    }
    if (this.enableAnimation) {
        if (this.animator) {
            this.animator.stop();
        }
        this.animator = new Spry.Widget.Accordion.PanelAnimator(this, panelB, {duration:this.duration, fps:this.fps, transition:this.transition});
        this.animator.start();
    } else {
        if (contentA) {
            contentA.style.display = "none";
            contentA.style.height = "0px";
        }
        contentB.style.display = "block";
        contentB.style.height = (this.useFixedPanelHeights ? this.fixedPanelHeight : contentB.scrollHeight) + "px";
    }
    if (panelA) {
        this.removeClassName(panelA, this.openClass);
        this.addClassName(panelA, this.closedClass);
    }
    this.removeClassName(panelB, this.closedClass);
    this.addClassName(panelB, this.openClass);
    this.currentPanel = panelB;
    return panelB;
}

Spry.Widget.Accordion.prototype.closePanel = function () 
{
    if (!this.useFixedPanelHeights && this.currentPanel) 
	{
        var panel = this.currentPanel;
        var content = this.getPanelContent(panel);
        if (content) 
		{
            if (this.enableAnimation) 
			{
                if (this.animator) 
				{
                    this.animator.stop();
                }
                this.animator = new Spry.Widget.Accordion.PanelAnimator(this, null, {duration:this.duration, fps:this.fps, transition:this.transition});
                this.animator.start();
            } else {
                content.style.display = "none";
                content.style.height = "0px";
            }
        }
        this.removeClassName(panel, this.openClass);
        this.addClassName(panel, this.closedClass);
        this.currentPanel = null;
    }
}
Spry.Widget.Accordion.prototype.openNextPanel = function()
{
	return this.openPanel(this.getCurrentPanelIndex() + 1);
};

Spry.Widget.Accordion.prototype.openPreviousPanel = function()
{
	return this.openPanel(this.getCurrentPanelIndex() - 1);
};

Spry.Widget.Accordion.prototype.openFirstPanel = function()
{
	return this.openPanel(0);
};

Spry.Widget.Accordion.prototype.openLastPanel = function()
{
	var panels = this.getPanels();
	return this.openPanel(panels[panels.length - 1]);
};

Spry.Widget.Accordion.prototype.onPanelTabClick = function (e, panel) {
    if (panel != this.currentPanel) {
        this.openPanel(panel);
    } else {
        this.closePanel();
    }
    if (this.enableKeyboardNavigation) {
        this.focus();
    }
    if (e.preventDefault) {
        e.preventDefault();
    } else {
        e.returnValue = false;
    }
    if (e.stopPropagation) {
        e.stopPropagation();
    } else {
        e.cancelBubble = true;
    }
   

 return false;
}

Spry.Widget.Accordion.prototype.onFocus = function(e)
{
	this.element.focus();
	this.hasFocus = true;
	this.addClassName(this.element, this.focusedClass);
	return false;
};

Spry.Widget.Accordion.prototype.onBlur = function(e)
{
	//this.element.blur();
	this.hasFocus = false;
	this.removeClassName(this.element, this.focusedClass);
	return false;
};

Spry.Widget.Accordion.KEY_UP = 38;
Spry.Widget.Accordion.KEY_DOWN = 40;

Spry.Widget.Accordion.prototype.onKeyDown = function(e)
{
	var key = e.keyCode;
	if (!this.hasFocus || (key != this.previousPanelKeyCode && key != this.nextPanelKeyCode))
		return true;
	
	var panels = this.getPanels();
	if (!panels || panels.length < 1)
		return false;
	var currentPanel = this.currentPanel ? this.currentPanel : panels[0];
	var nextPanel = (key == this.nextPanelKeyCode) ? currentPanel.nextSibling : currentPanel.previousSibling;
	
	while (nextPanel)
	{
		if (nextPanel.nodeType == 1 /* Node.ELEMENT_NODE */)
			break;
		nextPanel = (key == this.nextPanelKeyCode) ? nextPanel.nextSibling : nextPanel.previousSibling;
	}
	
	if (nextPanel && currentPanel != nextPanel)
		this.openPanel(nextPanel);

	if (e.preventDefault) e.preventDefault();
		else e.returnValue = false;
	if (e.stopPropagation) e.stopPropagation();
		else e.cancelBubble = true;

	return false;
};
//same
Spry.Widget.Accordion.prototype.attachPanelHandlers = function(panel)
{
	if (!panel)
		return;

	var tab = this.getPanelTab(panel);

	if (tab)
	{
		var self = this;
		Spry.Widget.Accordion.addEventListener(tab, "click", function(e) { return self.onPanelTabClick(e, panel); }, false);
Spry.Widget.Accordion.addEventListener(tab, "mouseover", function(e) { return self.onPanelTabMouseOver(e, panel); }, false);
 Spry.Widget.Accordion.addEventListener(tab, "mouseout", function(e) { return self.onPanelTabMouseOut(e, panel); }, false);
	}
};

Spry.Widget.Accordion.addEventListener = function(element, eventType, handler, capture)
{
	try
	{
		if (element.addEventListener)
			element.addEventListener(eventType, handler, capture);
		else if (element.attachEvent)
			element.attachEvent("on" + eventType, handler);
	}
	catch (e) {}
};

//same

Spry.Widget.Accordion.prototype.initPanel =function (panel, isDefault) 
{
    var content = this.getPanelContent(panel);
    if (isDefault) 
	{
        this.currentPanel = panel;
        this.removeClassName(panel, this.closedClass);
        this.addClassName(panel, this.openClass);
		// Attempt to set up the height of the default panel. We don't want to
		// do any dynamic panel height calculations here because our accordion
		// or one of its parent containers may be display:none.
        if (content) 
		{
            if (this.useFixedPanelHeights) 
			{
				// We are in fixed panel height mode and the user passed in
				// a panel height for us to use.
                if (this.fixedPanelHeight) 
				{
                    content.style.height = this.fixedPanelHeight + "px";
                }
            } else {
				// We are in variable panel height mode, but since we can't
				// calculate the panel height here, we just set the height to
				// auto so that it expands to show all of its content.
                content.style.height = "auto";
            }
        }
    } else {
        this.removeClassName(panel, this.openClass);
        this.addClassName(panel, this.closedClass);
        if (content) {
            content.style.height = "0px";
            content.style.display = "none";
        }
    }
    this.attachPanelHandlers(panel);
}
Spry.Widget.Accordion.prototype.attachBehaviors = function()
{
	var panels = this.getPanels();
	for (var i = 0; i < panels.length; i++)
	this.initPanel(panels[i], i == this.defaultPanel);

	// Advanced keyboard navigation requires the tabindex attribute
	// on the top-level element.

	this.enableKeyboardNavigation = (this.enableKeyboardNavigation && this.element.attributes.getNamedItem("tabindex"));
	if (this.enableKeyboardNavigation)
	{
		var self = this;
		Spry.Widget.Accordion.addEventListener(this.element, "focus", function(e) { return self.onFocus(e); }, true);
		Spry.Widget.Accordion.addEventListener(this.element, "blur", function(e) { return self.onBlur(e); }, false);
		Spry.Widget.Accordion.addEventListener(this.element, "keydown", function(e) { return self.onKeyDown(e); }, false);
}
};


Spry.Widget.Accordion.prototype.getPanels = function()
{
	return this.getElementChildren(this.element);
};

Spry.Widget.Accordion.prototype.getCurrentPanel = function()
{
	return this.currentPanel;
};
Spry.Widget.Accordion.prototype.getPanelIndex = function (panel) {
    var panels = this.getPanels();
    for (var i = 0; i < panels.length; i++) {
        if (panel == panels[i]) {
            return i;
        }
    }
    return -1;
};

Spry.Widget.Accordion.prototype.getCurrentPanelIndex = function()
{
	return this.getPanelIndex(this.currentPanel);
};

Spry.Widget.Accordion.prototype.getPanelTab = function(panel)
{
	if (!panel)
		return null;
	return this.getElementChildren(panel)[0];
};

Spry.Widget.Accordion.prototype.getPanelContent = function(panel)
{
	if (!panel)
		return null;
	return this.getElementChildren(panel)[1];
};

Spry.Widget.Accordion.prototype.getElementChildren = function(element)
{
	var children = [];
	var child = element.firstChild;
	while (child)
	{
		if (child.nodeType == 1 /* Node.ELEMENT_NODE */)
			children.push(child);
		child = child.nextSibling;
	}
	return children;
};

Spry.Widget.Accordion.prototype.focus = function()
{
	if (this.element && this.element.focus)
		this.element.focus();
};
Spry.Widget.Accordion.prototype.blur = function () 
{
    if (this.element && this.element.blur);
    this.element.blur();
    
};

/////////////////////////////////////////////////////

Spry.Widget.Accordion.PanelAnimator = function (accordion, panel, opts) 
{
    this.timer = null;
    this.interval = 0;
    
	this.fps = 60;
    this.duration = 500;
    this.startTime = 0;
    
	this.transition = Spry.Widget.Accordion.PanelAnimator.defaultTransition;
    
	this.onComplete = null;
    
	this.panel = panel;
    this.panelToOpen = accordion.getElement(panel);
    this.panelData = [];
    
	Spry.Widget.Accordion.setOptions(this, opts, true);
    this.interval = Math.floor(1000 / this.fps);
	
	// Set up the array of panels we want to animate.
    
	var panels = accordion.getPanels();
    for (var i = 0; i < panels.length; i++) 
	{
        var p = panels[i];
        var c = accordion.getPanelContent(p);
        if (c) 
		{
            var h = c.offsetHeight;
            if (h == undefined) 
			{
                h = 0;
            }
            if (p == panel && h == 0) 
			{
                c.style.display = "block";
            }
            if (p == panel || h > 0) 
			{
                var obj = new Object;
                obj.panel = p;
                obj.content = c;
                obj.fromHeight = h;
                obj.toHeight = p == panel ? accordion.useFixedPanelHeights ? accordion.fixedPanelHeight : c.scrollHeight : 0;
                obj.distance = obj.toHeight - obj.fromHeight;
                obj.overflow = c.style.overflow;
                this.panelData.push(obj);
                c.style.overflow = "hidden";
                c.style.height = h + "px";

            }
        }
    }
};




Spry.Widget.Accordion.PanelAnimator.defaultTransition = function(time, begin, finish, duration) { time /= duration; return begin + ((2 - time) * time * finish); };

Spry.Widget.Accordion.PanelAnimator.prototype.start = function()
	{
	var self = this;
	this.startTime = (new Date).getTime();
	this.timer = setTimeout(function() { self.stepAnimation(); }, this.interval);
};
	
Spry.Widget.Accordion.PanelAnimator.prototype.stop = function()
{
	if (this.timer)
	{
		clearTimeout(this.timer);

		// If we're killing the timer, restore the overflow
		// properties on the panels we were animating!

		if (this.stepCount < this.steps)
		{
			for (i = 0; i < this.panelData.length; i++)
			{
				obj = this.panelData[i];
				obj.content.style.overflow = obj.overflow;
			}
		}
	}

	this.timer = null;
};

Spry.Widget.Accordion.PanelAnimator.prototype.stepAnimation = function () 
{
    var curTime = (new Date).getTime();
    var elapsedTime = curTime - this.startTime;
    
	var i, obj;
   
   if (elapsedTime >= this.duration) 
   {
        for (i = 0; i < this.panelData.length; i++) 
		{
            obj = this.panelData[i];
            if (obj.panel != this.panel) 
			{
                obj.content.style.display = "none";
                obj.content.style.height = "0px";
            }
            obj.content.style.overflow = obj.overflow;
            obj.content.style.height = obj.toHeight + "px";
        }
        if (this.onComplete) 
		{
            this.onComplete();
        }
        return;
    }
	
    for (i = 0; i < this.panelData.length; i++) 
	{
        obj = this.panelData[i];
        var ht = this.transition(elapsedTime, obj.fromHeight, obj.distance, this.duration);
        obj.content.style.height = (ht < 0 ? 0 : ht) + "px";
    }
    var self = this;
    this.timer = setTimeout(function () {self.stepAnimation();}, this.interval);
}