// SpryCollapsiblePanel.js - version 0.8 - Spry Pre-Release 1.6.1
//
// 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.

(function() { // BeginSpryComponent

if (typeof Spry == "undefined") window.Spry = {}; if (!Spry.Widget) Spry.Widget = {};

Spry.Widget.CollapsiblePanel = function(element, opts)
{
    this.element = this.getElement(element);
    this.focusElement = null;
    this.hoverClass = "CollapsiblePanelTabHover";
    this.openClass = "CollapsiblePanelOpen";
    this.closedClass = "CollapsiblePanelClosed";
    this.focusedClass = "CollapsiblePanelFocused";
    this.enableAnimation = true;
    this.enableKeyboardNavigation = true;
    this.animator = null;
    this.hasFocus = false;
    this.contentIsOpen = true;

    this.openPanelKeyCode = Spry.Widget.CollapsiblePanel.KEY_DOWN;
    this.closePanelKeyCode = Spry.Widget.CollapsiblePanel.KEY_UP;

    Spry.Widget.CollapsiblePanel.setOptions(this, opts);

    this.attachBehaviors();
};

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

Spry.Widget.CollapsiblePanel.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.CollapsiblePanel.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.CollapsiblePanel.prototype.hasClassName = function(ele, className)
{
    if (!ele || !className || !ele.className || ele.className.search(new RegExp("\\b" + className + "\\b")) == -1)
        return false;
    return true;
};

Spry.Widget.CollapsiblePanel.prototype.setDisplay = function(ele, display)
{
    if( ele )
        ele.style.display = display;
};

Spry.Widget.CollapsiblePanel.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.CollapsiblePanel.prototype.onTabMouseOver = function(e)
{
    this.addClassName(this.getTab(), this.hoverClass);
    return false;
};

Spry.Widget.CollapsiblePanel.prototype.onTabMouseOut = function(e)
{
    this.removeClassName(this.getTab(), this.hoverClass);
    return false;
};

Spry.Widget.CollapsiblePanel.prototype.open = function()
{
    this.contentIsOpen = true;
    if (this.enableAnimation)
    {
        if (this.animator)
            this.animator.stop();
        this.animator = new Spry.Widget.CollapsiblePanel.PanelAnimator(this, true, { duration: this.duration, fps: this.fps, transition: this.transition });
        this.animator.start();
    }
    else
        this.setDisplay(this.getContent(), "block");

    this.removeClassName(this.element, this.closedClass);
    this.addClassName(this.element, this.openClass);
};

Spry.Widget.CollapsiblePanel.prototype.close = function()
{
    this.contentIsOpen = false;
    if (this.enableAnimation)
    {
        if (this.animator)
            this.animator.stop();
        this.animator = new Spry.Widget.CollapsiblePanel.PanelAnimator(this, false, { duration: this.duration, fps: this.fps, transition: this.transition });
        this.animator.start();
    }
    else
        this.setDisplay(this.getContent(), "none");

    this.removeClassName(this.element, this.openClass);
    this.addClassName(this.element, this.closedClass);
};

Spry.Widget.CollapsiblePanel.prototype.onTabClick = function(e)
{
    if (this.isOpen())
        this.close();
    else
        this.open();

    this.focus();

    return this.stopPropagation(e);
};

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

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

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

Spry.Widget.CollapsiblePanel.prototype.onKeyDown = function(e)
{
    var key = e.keyCode;
    if (!this.hasFocus || (key != this.openPanelKeyCode && key != this.closePanelKeyCode))
        return true;

    if (this.isOpen() && key == this.closePanelKeyCode)
        this.close();
    else if ( key == this.openPanelKeyCode)
        this.open();
    
    return this.stopPropagation(e);
};

Spry.Widget.CollapsiblePanel.prototype.stopPropagation = function(e)
{
    if (e.preventDefault) e.preventDefault();
    else e.returnValue = false;
    if (e.stopPropagation) e.stopPropagation();
    else e.cancelBubble = true;
    return false;
};

Spry.Widget.CollapsiblePanel.prototype.attachPanelHandlers = function()
{
    var tab = this.getTab();
    if (!tab)
        return;

    var self = this;
    Spry.Widget.CollapsiblePanel.addEventListener(tab, "click", function(e) { return self.onTabClick(e); }, false);
    Spry.Widget.CollapsiblePanel.addEventListener(tab, "mouseover", function(e) { return self.onTabMouseOver(e); }, false);
    Spry.Widget.CollapsiblePanel.addEventListener(tab, "mouseout", function(e) { return self.onTabMouseOut(e); }, false);

    if (this.enableKeyboardNavigation)
    {
        // XXX: IE doesn't allow the setting of tabindex dynamically. This means we can't
        // rely on adding the tabindex attribute if it is missing to enable keyboard navigation
        // by default.

        // Find the first element within the tab container that has a tabindex or the first
        // anchor tag.
        
        var tabIndexEle = null;
        var tabAnchorEle = null;

        this.preorderTraversal(tab, function(node) {
            if (node.nodeType == 1 /* NODE.ELEMENT_NODE */)
            {
                var tabIndexAttr = tab.attributes.getNamedItem("tabindex");
                if (tabIndexAttr)
                {
                    tabIndexEle = node;
                    return true;
                }
                if (!tabAnchorEle && node.nodeName.toLowerCase() == "a")
                    tabAnchorEle = node;
            }
            return false;
        });

        if (tabIndexEle)
            this.focusElement = tabIndexEle;
        else if (tabAnchorEle)
            this.focusElement = tabAnchorEle;

        if (this.focusElement)
        {
            Spry.Widget.CollapsiblePanel.addEventListener(this.focusElement, "focus", function(e) { return self.onFocus(e); }, false);
            Spry.Widget.CollapsiblePanel.addEventListener(this.focusElement, "blur", function(e) { return self.onBlur(e); }, false);
            Spry.Widget.CollapsiblePanel.addEventListener(this.focusElement, "keydown", function(e) { return self.onKeyDown(e); }, false);
        }
    }
};

Spry.Widget.CollapsiblePanel.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) {}
};

Spry.Widget.CollapsiblePanel.prototype.preorderTraversal = function(root, func)
{
    var stopTraversal = false;
    if (root)
    {
        stopTraversal = func(root);
        if (root.hasChildNodes())
        {
            var child = root.firstChild;
            while (!stopTraversal && child)
            {
                stopTraversal = this.preorderTraversal(child, func);
                try { child = child.nextSibling; } catch (e) { child = null; }
            }
        }
    }
    return stopTraversal;
};

Spry.Widget.CollapsiblePanel.prototype.attachBehaviors = function()
{
    var panel = this.element;
    var tab = this.getTab();
    var content = this.getContent();

    if (this.contentIsOpen || this.hasClassName(panel, this.openClass))
    {
        this.addClassName(panel, this.openClass);
        this.removeClassName(panel, this.closedClass);
        this.setDisplay(content, "block");
        this.contentIsOpen = true;
    }
    else
    {
        this.removeClassName(panel, this.openClass);
        this.addClassName(panel, this.closedClass);
        this.setDisplay(content, "none");
        this.contentIsOpen = false;
    }

    this.attachPanelHandlers();
};

Spry.Widget.CollapsiblePanel.prototype.getTab = function()
{
    return this.getElementChildren(this.element)[0];
};

Spry.Widget.CollapsiblePanel.prototype.getContent = function()
{
    return this.getElementChildren(this.element)[1];
};

Spry.Widget.CollapsiblePanel.prototype.isOpen = function()
{
    return this.contentIsOpen;
};

Spry.Widget.CollapsiblePanel.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.CollapsiblePanel.prototype.focus = function()
{
    if (this.focusElement && this.focusElement.focus)
        this.focusElement.focus();
};

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

Spry.Widget.CollapsiblePanel.PanelAnimator = function(panel, doOpen, opts)
{
    this.timer = null;
    this.interval = 0;

    this.fps = 60;
    this.duration = 500;
    this.startTime = 0;

    this.transition = Spry.Widget.CollapsiblePanel.PanelAnimator.defaultTransition;

    this.onComplete = null;

    this.panel = panel;
    this.content = panel.getContent();
    this.doOpen = doOpen;

    Spry.Widget.CollapsiblePanel.setOptions(this, opts, true);

    this.interval = Math.floor(1000 / this.fps);

    var c = this.content;

    var curHeight = c.offsetHeight ? c.offsetHeight : 0;
    this.fromHeight = (doOpen && c.style.display == "none") ? 0 : curHeight;

    if (!doOpen)
        this.toHeight = 0;
    else
    {
        if (c.style.display == "none")
        {
            // The content area is not displayed so in order to calculate the extent
            // of the content inside it, we have to set its display to block.

            c.style.visibility = "hidden";
            c.style.display = "block";
        }

        // Clear the height property so we can calculate
        // the full height of the content we are going to show.

        c.style.height = "";
        this.toHeight = c.offsetHeight;
    }

    this.distance = this.toHeight - this.fromHeight;
    this.overflow = c.style.overflow;

    c.style.height = this.fromHeight + "px";
    c.style.visibility = "visible";
    c.style.overflow = "hidden";
    c.style.display = "block";
};

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

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

Spry.Widget.CollapsiblePanel.PanelAnimator.prototype.stop = function()
{
    if (this.timer)
    {
        clearTimeout(this.timer);

        // If we're killing the timer, restore the overflow property.

        this.content.style.overflow = this.overflow;
    }

    this.timer = null;
};

Spry.Widget.CollapsiblePanel.PanelAnimator.prototype.stepAnimation = function()
{
    var curTime = (new Date).getTime();
    var elapsedTime = curTime - this.startTime;

    if (elapsedTime >= this.duration)
    {
        if (!this.doOpen)
            this.content.style.display = "none";
        this.content.style.overflow = this.overflow;
        this.content.style.height = this.toHeight + "px";
        if (this.onComplete)
            this.onComplete();
        return;
    }

    var ht = this.transition(elapsedTime, this.fromHeight, this.distance, this.duration);

    this.content.style.height = ((ht < 0) ? 0 : ht) + "px";

    var self = this;
    this.timer = setTimeout(function() { self.stepAnimation(); }, this.interval);
};

Spry.Widget.CollapsiblePanelGroup = function(element, opts)
{
    this.element = this.getElement(element);
    this.opts = opts;

    this.attachBehaviors();
};

Spry.Widget.CollapsiblePanelGroup.prototype.setOptions = Spry.Widget.CollapsiblePanel.prototype.setOptions;
Spry.Widget.CollapsiblePanelGroup.prototype.getElement = Spry.Widget.CollapsiblePanel.prototype.getElement;
Spry.Widget.CollapsiblePanelGroup.prototype.getElementChildren = Spry.Widget.CollapsiblePanel.prototype.getElementChildren;

Spry.Widget.CollapsiblePanelGroup.prototype.setElementWidget = function(element, widget)
{
    if (!element || !widget)
        return;
    if (!element.spry)
        element.spry = new Object;
    element.spry.collapsiblePanel = widget;
};

Spry.Widget.CollapsiblePanelGroup.prototype.getElementWidget = function(element)
{
    return (element && element.spry && element.spry.collapsiblePanel) ? element.spry.collapsiblePanel : null;
};

Spry.Widget.CollapsiblePanelGroup.prototype.getPanels = function()
{
    if (!this.element)
        return [];
    return this.getElementChildren(this.element);
};

Spry.Widget.CollapsiblePanelGroup.prototype.getPanel = function(panelIndex)
{
    return this.getPanels()[panelIndex];
};

Spry.Widget.CollapsiblePanelGroup.prototype.attachBehaviors = function()
{
    if (!this.element)
        return;

    var cpanels = this.getPanels();
    var numCPanels = cpanels.length;
    for (var i = 0; i < numCPanels; i++)
    {
        var cpanel = cpanels[i];
        this.setElementWidget(cpanel, new Spry.Widget.CollapsiblePanel(cpanel, this.opts));
    }
};

Spry.Widget.CollapsiblePanelGroup.prototype.openPanel = function(panelIndex)
{
    var w = this.getElementWidget(this.getPanel(panelIndex));
    if (w && !w.isOpen())
        w.open();
};

Spry.Widget.CollapsiblePanelGroup.prototype.closePanel = function(panelIndex)
{
    var w = this.getElementWidget(this.getPanel(panelIndex));
    if (w && w.isOpen())
        w.close();
};

Spry.Widget.CollapsiblePanelGroup.prototype.openAllPanels = function()
{
    var cpanels = this.getPanels();
    var numCPanels = cpanels.length;
    for (var i = 0; i < numCPanels; i++)
    {
        var w = this.getElementWidget(cpanels[i]);
        if (w && !w.isOpen())
            w.open();
    }
};

Spry.Widget.CollapsiblePanelGroup.prototype.closeAllPanels = function()
{
    var cpanels = this.getPanels();
    var numCPanels = cpanels.length;
    for (var i = 0; i < numCPanels; i++)
    {
        var w = this.getElementWidget(cpanels[i]);
        if (w && w.isOpen())
            w.close();
    }
};

})(); // EndSpryComponent