// SpryAccordion.js - version 0.15 - 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.

 

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

 

Spry.Widget.Accordion = function(element, opts)
{
    this.element = this.getElement(element);
    this.defaultPanel = 0;
    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.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 + "px" : "auto";
    }

 

    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()
{
    // The accordion can only ever have one panel open at any
    // give time, so this method only closes the current panel.
    // If the accordion is in fixed panel heights mode, this
    // method does nothing.

 

    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.hasFocus = true;
    this.addClassName(this.element, this.focusedClass);
    return false;
};

 

Spry.Widget.Accordion.prototype.onBlur = function(e)
{
    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;
};

 

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) {}
};

 

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); }, false);
        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 = [];
    this.useFixedPanelHeights = accordion.useFixedPanelHeights;

 

    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!

 

        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 = (this.useFixedPanelHeights || obj.toHeight == 0) ? obj.toHeight + "px" : "auto";
        }
        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);
};