/* 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 = 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.duration = 500;



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

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



    this.useFixedPanelHeights = true;

    this.fixedPanelHeight = 0;



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



    // Unfortunately in some browsers like Safari, the Stylesheets our

    // page depends on may not have been loaded at the time we are called.

    // This means we have to defer attaching our behaviors until after the

    // onload event fires, since some of our behaviors rely on dimensions

    // specified in the CSS.



    if (Spry.Widget.Accordion.onloadDidFire)

        this.attachBehaviors();

    else

        Spry.Widget.Accordion.loadQueue.push(this);

};



Spry.Widget.Accordion.onloadDidFire = false;

Spry.Widget.Accordion.loadQueue = [];



Spry.Widget.Accordion.addLoadListener = function(handler)

{

    if (typeof window.addEventListener != 'undefined')

        window.addEventListener('load', handler, false);

    else if (typeof document.addEventListener != 'undefined')

        document.addEventListener('load', handler, false);

    else if (typeof window.attachEvent != 'undefined')

        window.attachEvent('onload', handler);

};



Spry.Widget.Accordion.processLoadQueue = function(handler)

{

    Spry.Widget.Accordion.onloadDidFire = true;

    var q = Spry.Widget.Accordion.loadQueue;

    var qlen = q.length;

    for (var i = 0; i < qlen; i++)

        q[i].attachBehaviors();

};



Spry.Widget.Accordion.addLoadListener(Spry.Widget.Accordion.processLoadQueue);



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(panel)

{

    if (panel)

        this.addClassName(this.getPanelTab(panel), this.hoverClass);

};



Spry.Widget.Accordion.prototype.onPanelTabMouseOut = function(panel)

{

    if (panel)

        this.removeClassName(this.getPanelTab(panel), this.hoverClass);

};



Spry.Widget.Accordion.prototype.openPanel = function(panel)

{

    var panelA = this.currentPanel;

    var panelB = panel;

    

    if (!panelB || panelA == panelB)    

        return;



    var contentA; 

    if( panelA )

        contentA = this.getPanelContent(panelA);

    var contentB = this.getPanelContent(panelB);



    if (! contentB)

        return;



    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 });

        this.animator.start();

    }

    else

    {

        if(contentA)

            contentA.style.height = "0px";

        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;

};



Spry.Widget.Accordion.prototype.openNextPanel = function()

{

    var panels = this.getPanels();

    var curPanelIndex = this.getCurrentPanelIndex();

    

    if( panels && curPanelIndex >= 0 && (curPanelIndex+1) < panels.length )

        this.openPanel(panels[curPanelIndex+1]);

};



Spry.Widget.Accordion.prototype.openPreviousPanel = function()

{

    var panels = this.getPanels();

    var curPanelIndex = this.getCurrentPanelIndex();

    

    if( panels && curPanelIndex > 0 && curPanelIndex < panels.length )

        this.openPanel(panels[curPanelIndex-1]);

};



Spry.Widget.Accordion.prototype.openFirstPanel = function()

{

    var panels = this.getPanels();

    if( panels )

        this.openPanel(panels[0]);

};



Spry.Widget.Accordion.prototype.openLastPanel = function()

{

    var panels = this.getPanels();

    if( panels )

        this.openPanel(panels[panels.length-1]);

};



Spry.Widget.Accordion.prototype.onPanelClick = function(panel)

{

    // if (this.enableKeyboardNavigation)

    //  this.element.focus();

    if (panel != this.currentPanel)

        this.openPanel(panel);

    this.focus();

};



Spry.Widget.Accordion.prototype.onFocus = function(e)

{

    // this.element.focus();

    this.hasFocus = true;

    this.addClassName(this.element, this.focusedClass);

};



Spry.Widget.Accordion.prototype.onBlur = function(e)

{

    // this.element.blur();

    this.hasFocus = false;

    this.removeClassName(this.element, this.focusedClass);

};



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.stopPropagation)

        e.stopPropagation();

    if (e.preventDefault)

        e.preventDefault();



    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.onPanelClick(panel); }, false);

        Spry.Widget.Accordion.addEventListener(tab, "mouseover", function(e) { return self.onPanelTabMouseOver(panel); }, false);

        Spry.Widget.Accordion.addEventListener(tab, "mouseout", function(e) { return self.onPanelTabMouseOut(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);

    }

    else

    {

        this.removeClassName(panel, this.openClass);

        this.addClassName(panel, this.closedClass);

        content.style.height = "0px";

    }

    

    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);

    }



    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.



        var tabIndexAttr = this.element.attributes.getNamedItem("tabindex");

        // if (!tabIndexAttr) this.element.tabindex = 0;

        if (tabIndexAttr)

        {

            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.getCurrentPanelIndex = function()

{

    var panels = this.getPanels();

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

    {

        if( this.currentPanel == panels[i] )

            return i;

    }

    return 0;

};



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.PanelAnimator = function(accordion, panel, opts)

{

    this.timer = null;

    this.interval = 0;

    this.stepCount = 0;



    this.fps = 0;

    this.steps = 10;

    this.duration = 500;

    this.onComplete = null;



    this.panel = panel;

    this.panelToOpen = accordion.getElement(panel);

    this.panelData = [];



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





    // If caller specified speed in terms of frames per second,

    // convert them into steps.



    if (this.fps > 0)

    {

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

        this.steps = parseInt((this.duration + (this.interval - 1)) / this.interval);

    }

    else if (this.steps > 0)

        this.interval = this.duration / this.steps;



    // 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)

            {

                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.increment = (obj.toHeight - obj.fromHeight) / this.steps;

                obj.overflow = c.style.overflow;

                this.panelData.push(obj);



                c.style.overflow = "hidden";

                c.style.height = h + "px";

            }

        }

    }

};



Spry.Widget.Accordion.PanelAnimator.prototype.start = function()

{

    var self = this;

    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()

{

    ++this.stepCount;



    this.animate();



    if (this.stepCount < this.steps)

        this.start();

    else if (this.onComplete)

        this.onComplete();

};



Spry.Widget.Accordion.PanelAnimator.prototype.animate = function()

{

    var i, obj;



    if (this.stepCount >= this.steps)

    {

        for (i = 0; i < this.panelData.length; i++)

        {

            obj = this.panelData[i];

            if (obj.panel != this.panel)

                obj.content.style.height = "0px";

            obj.content.style.overflow = obj.overflow;

            obj.content.style.height = obj.toHeight + "px";

        }

    }

    else

    {

        for (i = 0; i < this.panelData.length; i++)

        {

            obj = this.panelData[i];

            obj.fromHeight += obj.increment;

            obj.content.style.height = obj.fromHeight + "px";

        }

    }

};