// SpryAccordion.js - version 0.14 - Spry Pre-Release 1.6
//
// Copyright (c) 2007. 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=true;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.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)
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);if(content)
{if(this.useFixedPanelHeights)
{if(this.fixedPanelHeight)
content.style.height=this.fixedPanelHeight+"px";}
else
{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);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)
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);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);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);};