/* 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";
		}
	}
};

//iPhone JS

			var currentCol = 1;

			function siteWidth() {
				var site = document.getElementById("site");
				if (site) {
					return site.offsetWidth;
				} else {
					return 320;
				}
			}

			function siteHeight() {
				var site = document.getElementById("site");
				if (site) {
					return site.offsetWidth;
				} else {
					return 350;
				}
			}


			function slide(direction, multiplier, time) {
				if (time == undefined) {
					time = .4;
				}
				var site = document.getElementById("site");
				var wide = document.getElementById("wide");
				var col = document.getElementById("col"+ currentCol);
				var marginLeft = pxToInt(wide.style.marginLeft);
				var targetMarginLeft = marginLeft;
				var top = pxToInt(col.style.top)
				var targetTop = top;
				var width = siteWidth();
				var height = siteHeight();
				if (multiplier != 1 && multiplier > 1) {
					multiplier = 1 + (((1 - multiplier) * 3) * -1);
				}
				if (multiplier < 0) {
					multiplier = 0;
				}
				if (direction == "left" && currentCol > 1) {
					targetMarginLeft += width;
					eval("loadCol"+ currentCol +"();");
					//createCookie("topic", "", 1);
					currentCol -= 1;
				} else if (direction == "right" && currentCol <= 2) {
					targetMarginLeft -= width;
					currentCol += 1;
				} else if (direction == "up") {
					targetTop -= height * multiplier;
				} else if (direction == "down") {
					targetTop += height * multiplier;
				}
				if (targetMarginLeft != marginLeft) {
					var anim = new YAHOO.util.Anim('wide', { marginLeft: {to: targetMarginLeft} }, time, YAHOO.util.Easing.easeOut);
					anim.animate();
				} else if (targetTop != top) {
					var ease = YAHOO.util.Easing.easeOutStrong;
					if (targetTop > 0) {
						targetTop = 0;
						ease = YAHOO.util.Easing.bounceOut;
					} else if (targetTop < ((col.offsetHeight - site.offsetHeight) * -1)) {
						targetTop = (col.offsetHeight - site.offsetHeight) * -1;
						ease = YAHOO.util.Easing.bounceOut;
					}
					var anim = new YAHOO.util.Anim('col'+ currentCol, { top: {to: targetTop} }, .7, ease);
					anim.animate();
				}
			}

			function pxToInt(str) {
				return Math.floor(str.replace(/px/g, ""));
			}

			function mouseX(e) {
				var IE = document.all?true:false
				var temp = 0;
				if (IE) {
					temp = event.clientX + document.body.scrollLeft;
				} else {
					temp = e.pageX;
				}  
				if (temp < 0) {
					temp = 0;
				}
				return temp;
			}

			function mouseY(e) {
				var IE = document.all?true:false
				var temp = 0;
				if (IE) {
					temp = event.clientY + document.body.scrollTop;
				} else {
					temp = e.pageY;
				}  
				if (temp < 0) {
					temp = 0;
				}
				return temp;
			}

			var gestureTrack = false;
			var gestureStartTime = 0;
			var gestureEndTime = 0;
			var gestureMouseStartX = 0;
			var gestureMouseStartY = 0;
			var gestureMouseEndX = 0;
			var gestureMouseEndY = 0;
			var gestureThreshold = 30;
			var gestureColStartY = 0;
			function gestureMouseDown(e) {
				var date = new Date();
				var col = document.getElementById("col"+ currentCol);
				gestureStartTime = date.getTime();
				gestureMouseStartX = mouseX(e);
				gestureMouseStartY = mouseY(e);
				gestureColStartY = pxToInt(col.style.top);
				document.onmousemove = gestureMouseMove;
			}
			function gestureMouseMove(e) {
				var site = document.getElementById("site");
				var col = document.getElementById("col"+ currentCol);
				if (col) {
					var diff = mouseY(e) - (gestureMouseStartY);
					var scroll = document.getElementById("scroll");
					if (Math.abs(diff) >= 3 && scroll) {
						gestureTrack = true;
						var target = gestureColStartY + diff;
						if (target > 20) {
							target = 20;
						} else if (target < (((col.offsetHeight - site.offsetHeight) * -1)) - 20) {
							target = ((col.offsetHeight - site.offsetHeight) * -1) - 20;
						}
						col.style.top = target +"px";
						scroll.style.height = (siteHeight() / (col.offsetHeight / site.offsetHeight)) +"px";
						scroll.style.display = "block";
						var scrollTarget = ((1 / (col.offsetHeight / site.offsetHeight)) * pxToInt(col.style.top) * -1);
						if (scrollTarget < 0) {
							scrollTarget = 0;
						}
						scroll.style.top = scrollTarget +"px";
					}
				}
			}
			function gestureMouseUp(e) {
				document.onmousemove = null;
				var scroll = document.getElementById("scroll");
				if (scroll) {
					scroll.style.display = "none";
				}
				if (gestureTrack == false) {
					return false;
				}
				window.setTimeout("gestureTrack = false;", 500);
				gestureMouseEndX = mouseX(e);
				gestureMouseEndY = mouseY(e);
				var date = new Date();
				gestureEndTime = date.getTime();
				var diffX = gestureMouseEndX - gestureMouseStartX;
				var diffY = gestureMouseEndY - gestureMouseStartY;
				var diffTime = gestureEndTime - gestureStartTime;
				var multiplier = 1;
				if (Math.abs(diffX) > gestureThreshold || Math.abs(diffY) > gestureThreshold) {
					if (Math.abs(diffY) > Math.abs(diffX)) {
						multiplier = Math.abs(diffY / diffTime);
						if (diffY > 0) {
							slide("down", multiplier);
						} else {
							slide("up", multiplier);
						}
					} else {
						if (diffX > 0) {
							//slide("left");
						} else {
							//slide("right");
						}
					}
				}
			}
			document.onmousedown = gestureMouseDown;
			document.onmouseup = gestureMouseUp;

			var col1Selected;
			var hasZoomedUp = false;
			function loadCol2(o, topic) {
				if (gestureTrack == false) {
					if (col1Selected != undefined) {
						col1Selected.className = "";
					}
					if (o != undefined) {
						o.className = "on";
					}
					col1Selected = o;

					if (topic != "" && topic != undefined) {
						var url = "/digg/query.php?url="+ escape("http://services.digg.com/stories/topic/"+ topic +"/popular?count=30");
						var handleStoriesSuccess = function(o){
							if(o.responseText !== undefined){
								var col2 = document.getElementById("col2");
								col2.innerHTML = o.responseText;
								col2.style.top = "0px";
								//createCookie("topic", topic, 1);
								window.parent.document.lastURL = url;
								if (hasZoomedUp == false) {
									slide("right", 1, .01);
									window.setTimeout("zoomUp();", 1);
								} else {
									slide("right");
								}
							}
						}
						var handleStoriesFailure = function (o) {
							alert("Error loading stories.");
						}
						YAHOO.util.Connect.asyncRequest("GET", url, {success:handleStoriesSuccess, failure:handleStoriesFailure} );
					}
				}
				return false;
			}

			var col2Selected;
			function loadCol3(o, url) {
				if (gestureTrack == false) {
					if (col2Selected != undefined) {
						col2Selected.className = "story";
					}
					if (o != undefined) {
						o.className = "story on";
					}
					col2Selected = o;
					slide("right");
					window.setTimeout(function () { window.location = url; }, 400);
				}
				return false;
			}

			function checkCookie() {
				var topic = readCookie("topic");
				if (topic != "" && topic != undefined) {
					loadCol2(null, topic);
				} else {
					zoomUp();
				}
			}

			function zoomUp() {
				hasZoomedUp = true;
				var anim = new YAHOO.util.Anim('wide', { marginTop: {to: 0} }, .4, YAHOO.util.Easing.easeOut);
				anim.animate();
			}

			function createCookie(name,value,days) {
				if (days) {
					var date = new Date();
					date.setTime(date.getTime()+(days*24*60*60*1000));
					var expires = "; expires="+date.toGMTString();
				}
				else var expires = "";
				document.cookie = name+"="+value+expires+"; path=/";
			}

			function readCookie(name) {
				var nameEQ = name + "=";
				var ca = document.cookie.split(';');
				for(var i=0;i < ca.length;i++) {
					var c = ca[i];
					while (c.charAt(0)==' ') c = c.substring(1,c.length);
					if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
				}
				return null;
			}

			function eraseCookie(name) {
				createCookie(name,"",-1);
			}