/* script from: http://www.kelvinluck.com/assets/jquery/jScrollPane/basic.html */

/*
Name: jquery.dimensions.min.js Version: 1.2
Copyright (c) 2007 Paul Bakaus (paul.bakaus@googlemail.com) and Brandon Aaron (brandon.aaron@gmail.com || http://brandonaaron.net)
*/
(function($){$.dimensions={version:'1.2'};$.each(['Height','Width'],function(i,name){$.fn['inner'+name]=function(){if(!this[0])return;var torl=name=='Height'?'Top':'Left',borr=name=='Height'?'Bottom':'Right';return this.is(':visible')?this[0]['client'+name]:num(this,name.toLowerCase())+num(this,'padding'+torl)+num(this,'padding'+borr);};$.fn['outer'+name]=function(options){if(!this[0])return;var torl=name=='Height'?'Top':'Left',borr=name=='Height'?'Bottom':'Right';options=$.extend({margin:false},options||{});var val=this.is(':visible')?this[0]['offset'+name]:num(this,name.toLowerCase())+num(this,'border'+torl+'Width')+num(this,'border'+borr+'Width')+num(this,'padding'+torl)+num(this,'padding'+borr);return val+(options.margin?(num(this,'margin'+torl)+num(this,'margin'+borr)):0);};});$.each(['Left','Top'],function(i,name){$.fn['scroll'+name]=function(val){if(!this[0])return;return val!=undefined?this.each(function(){this==window||this==document?window.scrollTo(name=='Left'?val:$(window)['scrollLeft'](),name=='Top'?val:$(window)['scrollTop']()):this['scroll'+name]=val;}):this[0]==window||this[0]==document?self[(name=='Left'?'pageXOffset':'pageYOffset')]||$.boxModel&&document.documentElement['scroll'+name]||document.body['scroll'+name]:this[0]['scroll'+name];};});$.fn.extend({position:function(){var left=0,top=0,elem=this[0],offset,parentOffset,offsetParent,results;if(elem){offsetParent=this.offsetParent();offset=this.offset();parentOffset=offsetParent.offset();offset.top-=num(elem,'marginTop');offset.left-=num(elem,'marginLeft');parentOffset.top+=num(offsetParent,'borderTopWidth');parentOffset.left+=num(offsetParent,'borderLeftWidth');results={top:offset.top-parentOffset.top,left:offset.left-parentOffset.left};}return results;},offsetParent:function(){var offsetParent=this[0].offsetParent;while(offsetParent&&(!/^body|html$/i.test(offsetParent.tagName)&&$.css(offsetParent,'position')=='static'))offsetParent=offsetParent.offsetParent;return $(offsetParent);}});function num(el,prop){return parseInt($.curCSS(el.jquery?el[0]:el,prop,true))||0;};})(jQuery);


/*
Name: jquery.mousewheel.min Version: 2.2
Copyright (c) 2006 Brandon Aaron (brandon.aaron@gmail.com || http://brandonaaron.net)
*/
(function($){$.fn.extend({mousewheel:function(f){if(!f.guid)f.guid=$.event.guid++;if(!$.event._mwCache)$.event._mwCache=[];return this.each(function(){if(this._mwHandlers)return this._mwHandlers.push(f);else this._mwHandlers=[];this._mwHandlers.push(f);var s=this;this._mwHandler=function(e){e=$.event.fix(e||window.event);$.extend(e,this._mwCursorPos||{});var delta=0,returnValue=true;if(e.wheelDelta)delta=e.wheelDelta/120;if(e.detail)delta=-e.detail/3;if(window.opera)delta=-e.wheelDelta;for(var i=0;i<s._mwHandlers.length;i++)if(s._mwHandlers[i])if(s._mwHandlers[i].call(s,e,delta)===false){returnValue=false;e.preventDefault();e.stopPropagation();}return returnValue;};if($.browser.mozilla&&!this._mwFixCursorPos){this._mwFixCursorPos=function(e){this._mwCursorPos={pageX:e.pageX,pageY:e.pageY,clientX:e.clientX,clientY:e.clientY};};$(this).bind('mousemove',this._mwFixCursorPos);}if(this.addEventListener)if($.browser.mozilla)this.addEventListener('DOMMouseScroll',this._mwHandler,false);else this.addEventListener('mousewheel',this._mwHandler,false);else
this.onmousewheel=this._mwHandler;$.event._mwCache.push($(this));});},unmousewheel:function(f){return this.each(function(){if(f&&this._mwHandlers){for(var i=0;i<this._mwHandlers.length;i++)if(this._mwHandlers[i]&&this._mwHandlers[i].guid==f.guid)delete this._mwHandlers[i];}else{if($.browser.mozilla&&!this._mwFixCursorPos)$(this).unbind('mousemove',this._mwFixCursorPos);if(this.addEventListener)if($.browser.mozilla)this.removeEventListener('DOMMouseScroll',this._mwHandler,false);else this.removeEventListener('mousewheel',this._mwHandler,false);else
this.onmousewheel=null;this._mwHandlers=this._mwHandler=this._mwFixCursorPos=this._mwCursorPos=null;}});}});$(window).one('unload',function(){var els=$.event._mwCache||[];for(var i=0;i<els.length;i++)els[i].unmousewheel();});})(jQuery);


/*
Name: jScrollPane.js
Copyright (c) 2006 Kelvin Luck (kelvin AT kelvinluck DOT com || http://www.kelvinluck.com)
*/

/**
 * Replace the vertical scroll bars on any matched elements with a fancy
 * styleable (via CSS) version. With JS disabled the elements will
 * gracefully degrade to the browsers own implementation of overflow:auto.
 * If the mousewheel plugin has been included on the page then the scrollable areas will also
 * respond to the mouse wheel.
 *
 * @example jQuery(".scroll-pane").jScrollPane();
 *
 * @name jScrollPane
 * @type jQuery
 * @param Object	settings	hash with options, described below.
 *								scrollbarWidth	-	The width of the generated scrollbar in pixels
 *								scrollbarMargin	-	The amount of space to leave on the side of the scrollbar in pixels
 *								wheelSpeed		-	The speed the pane will scroll in response to the mouse wheel in pixels
 *								showArrows		-	Whether to display arrows for the user to scroll with
 *								arrowSize		-	The height of the arrow buttons if showArrows=true
 *								animateTo		-	Whether to animate when calling scrollTo and scrollBy
 *								dragMinHeight	-	The minimum height to allow the drag bar to be
 *								dragMaxHeight	-	The maximum height to allow the drag bar to be
 *								animateInterval	-	The interval in milliseconds to update an animating scrollPane (default 100)
 *								animateStep		-	The amount to divide the remaining scroll distance by when animating (default 3)
 *								maintainPosition-	Whether you want the contents of the scroll pane to maintain it's position when you re-initialise it - so it doesn't scroll as you add more content (default true)
 *								scrollbarOnLeft	-	Display the scrollbar on the left side?  (needs stylesheet changes, see examples.html)
 * @return jQuery
 * @cat Plugins/jScrollPane
 * @author Kelvin Luck (kelvin AT kelvinluck DOT com || http://www.kelvinluck.com)
 */
jQuery.jScrollPane = {
	active : []
};
jQuery.fn.jScrollPane = function(settings)
{
	settings = jQuery.extend(
		{
			scrollbarWidth : 10,
			scrollbarMargin : 5,
			wheelSpeed : 18,
			showArrows : false,
			arrowSize : 0,
			animateTo : false,
			dragMinHeight : 1,
			dragMaxHeight : 99999,
			animateInterval : 100,
			animateStep: 3,
			maintainPosition: true,
			scrollbarOnLeft: false
		}, settings
	);
	return this.each(
		function()
		{
			var $this = jQuery(this);
			
			if (jQuery(this).parent().is('.jScrollPaneContainer')) {
				var currentScrollPosition = settings.maintainPosition ? $this.offset({relativeTo:jQuery(this).parent()[0]}).top : 0;
				var $c = jQuery(this).parent();
				var paneWidth = $c.innerWidth();
				var paneHeight = $c.outerHeight();
				var trackHeight = paneHeight;
				if ($c.unmousewheel) {
					$c.unmousewheel();
				}
				jQuery('>.jScrollPaneTrack, >.jScrollArrowUp, >.jScrollArrowDown', $c).remove();
				$this.css({'top':0});
			} else {
				var currentScrollPosition = 0;
				this.originalPadding = $this.css('paddingTop') + ' ' + $this.css('paddingRight') + ' ' + $this.css('paddingBottom') + ' ' + $this.css('paddingLeft');
				this.originalSidePaddingTotal = (parseInt($this.css('paddingLeft')) || 0) + (parseInt($this.css('paddingRight')) || 0);
				var paneWidth = $this.innerWidth();
				var paneHeight = $this.innerHeight();
				var trackHeight = paneHeight;
				$this.wrap(
					jQuery('<div></div>').attr(
						{'className':'jScrollPaneContainer'}
					).css(
						{
							'height':paneHeight+'px', 
							'width':paneWidth+'px'
						}
					)
				);
				// deal with text size changes (if the jquery.em plugin is included)
				// and re-initialise the scrollPane so the track maintains the
				// correct size
				jQuery(document).bind(
					'emchange', 
					function(e, cur, prev)
					{
						$this.jScrollPane(settings);
					}
				);
			}
			var p = this.originalSidePaddingTotal;
			
			var cssToApply = {
				'height':'auto',
				'width':paneWidth - settings.scrollbarWidth - settings.scrollbarMargin - p + 'px'
			}

			if(settings.scrollbarOnLeft) {
				cssToApply.paddingLeft = settings.scrollbarMargin + settings.scrollbarWidth + 'px';
			} else {
				cssToApply.paddingRight = settings.scrollbarMargin + 'px';
			}

			$this.css(cssToApply);

			var contentHeight = $this.outerHeight();
			var percentInView = paneHeight / contentHeight;

			if (percentInView < .99) {
				var $container = $this.parent();
				$container.append(
					jQuery('<div></div>').attr({'className':'jScrollPaneTrack'}).css({'width':settings.scrollbarWidth+'px'}).append(
						jQuery('<div></div>').attr({'className':'jScrollPaneDrag'}).css({'width':settings.scrollbarWidth+'px'}).append(
							jQuery('<div></div>').attr({'className':'jScrollPaneDragTop'}).css({'width':settings.scrollbarWidth+'px'}),
							jQuery('<div></div>').attr({'className':'jScrollPaneDragBottom'}).css({'width':settings.scrollbarWidth+'px'})
						)
					)
				);
				
				var $track = jQuery('>.jScrollPaneTrack', $container);
				var $drag = jQuery('>.jScrollPaneTrack .jScrollPaneDrag', $container);
				
				if (settings.showArrows) {
					
					var currentArrowButton;
					var currentArrowDirection;
					var currentArrowInterval;
					var currentArrowInc;
					var whileArrowButtonDown = function()
					{
						if (currentArrowInc > 4 || currentArrowInc%4==0) {
							positionDrag(dragPosition + currentArrowDirection * mouseWheelMultiplier);
						}
						currentArrowInc ++;
					};
					var onArrowMouseUp = function(event)
					{
						jQuery('html').unbind('mouseup', onArrowMouseUp);
						currentArrowButton.removeClass('jScrollActiveArrowButton');
						clearInterval(currentArrowInterval);
						//console.log($(event.target));
						//currentArrowButton.parent().removeClass('jScrollArrowUpClicked jScrollArrowDownClicked');
					};
					var onArrowMouseDown = function() {
						//console.log(direction);
						//currentArrowButton = $(this);
						jQuery('html').bind('mouseup', onArrowMouseUp);
						currentArrowButton.addClass('jScrollActiveArrowButton');
						currentArrowInc = 0;
						whileArrowButtonDown();
						currentArrowInterval = setInterval(whileArrowButtonDown, 100);
					};
					$container
						.append(
							jQuery('<a></a>')
								.attr({'href':'javascript:;', 'className':'jScrollArrowUp'})
								.css({'width':settings.scrollbarWidth+'px'})
								.html('Scroll up')
								.bind('mousedown', function()
								{
									currentArrowButton = jQuery(this);
									currentArrowDirection = -1;
									onArrowMouseDown();
									this.blur();
									return false;
								}),
							jQuery('<a></a>')
								.attr({'href':'javascript:;', 'className':'jScrollArrowDown'})
								.css({'width':settings.scrollbarWidth+'px'})
								.html('Scroll down')
								.bind('mousedown', function()
								{
									currentArrowButton = jQuery(this);
									currentArrowDirection = 1;
									onArrowMouseDown();
									this.blur();
									return false;
								})
						);
					var $upArrow = jQuery('>.jScrollArrowUp', $container);
					var $downArrow = jQuery('>.jScrollArrowDown', $container);
					if (settings.arrowSize) {
						trackHeight = paneHeight - settings.arrowSize - settings.arrowSize;
						$track
							.css({'height': trackHeight+'px', top:settings.arrowSize+'px'})
					} else {
						var topArrowHeight = $upArrow.height();
						settings.arrowSize = topArrowHeight;
						trackHeight = paneHeight - topArrowHeight - $downArrow.height();
						$track
							.css({'height': trackHeight+'px', top:topArrowHeight+'px'})
					}
				}
				
				var $pane = jQuery(this).css({'position':'absolute', 'overflow':'visible'});
				
				var currentOffset;
				var maxY;
				var mouseWheelMultiplier;
				// store this in a seperate variable so we can keep track more accurately than just updating the css property..
				var dragPosition = 0;
				var dragMiddle = percentInView*paneHeight/2;
				
				// pos function borrowed from tooltip plugin and adapted...
				var getPos = function (event, c) {
					var p = c == 'X' ? 'Left' : 'Top';
					return event['page' + c] || (event['client' + c] + (document.documentElement['scroll' + p] || document.body['scroll' + p])) || 0;
				};
				
				var ignoreNativeDrag = function() {	return false; };
				
				var initDrag = function()
				{
					ceaseAnimation();
					currentOffset = $drag.offset(false);
					currentOffset.top -= dragPosition;
					maxY = trackHeight - $drag[0].offsetHeight;
					mouseWheelMultiplier = 2 * settings.wheelSpeed * maxY / contentHeight;
				};
				
				var onStartDrag = function(event)
				{
					initDrag();
					dragMiddle = getPos(event, 'Y') - dragPosition - currentOffset.top;
					jQuery('html').bind('mouseup', onStopDrag).bind('mousemove', updateScroll);
					if (jQuery.browser.msie) {
						jQuery('html').bind('dragstart', ignoreNativeDrag).bind('selectstart', ignoreNativeDrag);
					}
					return false;
				};
				var onStopDrag = function()
				{
					jQuery('html').unbind('mouseup', onStopDrag).unbind('mousemove', updateScroll);
					dragMiddle = percentInView*paneHeight/2;
					if (jQuery.browser.msie) {
						jQuery('html').unbind('dragstart', ignoreNativeDrag).unbind('selectstart', ignoreNativeDrag);
					}
				};
				var positionDrag = function(destY)
				{
					destY = destY < 0 ? 0 : (destY > maxY ? maxY : destY);
					dragPosition = destY;
					$drag.css({'top':destY+'px'});
					var p = destY / maxY;
					$pane.css({'top':((paneHeight-contentHeight)*p) + 'px'});
					$this.trigger('scroll');
					if (settings.showArrows) {
						$upArrow[destY == 0 ? 'addClass' : 'removeClass']('disabled');
						$downArrow[destY == maxY ? 'addClass' : 'removeClass']('disabled');
					}
				};
				var updateScroll = function(e)
				{
					positionDrag(getPos(e, 'Y') - currentOffset.top - dragMiddle);
				};
				
				var dragH = Math.max(Math.min(percentInView*(paneHeight-settings.arrowSize*2), settings.dragMaxHeight), settings.dragMinHeight);
				
				$drag.css(
					{'height':dragH+'px'}
				).bind('mousedown', onStartDrag);
				
				var trackScrollInterval;
				var trackScrollInc;
				var trackScrollMousePos;
				var doTrackScroll = function()
				{
					if (trackScrollInc > 8 || trackScrollInc%4==0) {
						positionDrag((dragPosition - ((dragPosition - trackScrollMousePos) / 2)));
					}
					trackScrollInc ++;
				};
				var onStopTrackClick = function()
				{
					clearInterval(trackScrollInterval);
					jQuery('html').unbind('mouseup', onStopTrackClick).unbind('mousemove', onTrackMouseMove);
				};
				var onTrackMouseMove = function(event)
				{
					trackScrollMousePos = getPos(event, 'Y') - currentOffset.top - dragMiddle;
				};
				var onTrackClick = function(event)
				{
					initDrag();
					onTrackMouseMove(event);
					trackScrollInc = 0;
					jQuery('html').bind('mouseup', onStopTrackClick).bind('mousemove', onTrackMouseMove);
					trackScrollInterval = setInterval(doTrackScroll, 100);
					doTrackScroll();
				};
				
				$track.bind('mousedown', onTrackClick);
				
				// if the mousewheel plugin has been included then also react to the mousewheel
				if ($container.mousewheel) {
					$container.mousewheel(
						function (event, delta) {
							initDrag();
							ceaseAnimation();
							var d = dragPosition;
							positionDrag(dragPosition - delta * mouseWheelMultiplier);
							var dragOccured = d != dragPosition;
							return !dragOccured;
						},
						false
					);					
				}
				var _animateToPosition;
				var _animateToInterval;
				function animateToPosition()
				{
					var diff = (_animateToPosition - dragPosition) / settings.animateStep;
					if (diff > 1 || diff < -1) {
						positionDrag(dragPosition + diff);
					} else {
						positionDrag(_animateToPosition);
						ceaseAnimation();
					}
				}
				var ceaseAnimation = function()
				{
					if (_animateToInterval) {
						clearInterval(_animateToInterval);
						delete _animateToPosition;
					}
				};
				var scrollTo = function(pos, preventAni)
				{
					if (typeof pos == "string") {
						$e = jQuery(pos, this);
						if (!$e.length) return;
						pos = $e.offset().top - $this.offset().top;
					}
					ceaseAnimation();
					var destDragPosition = -pos/(paneHeight-contentHeight) * maxY;
					if (preventAni || !settings.animateTo) {
						positionDrag(destDragPosition);
					} else {
						_animateToPosition = destDragPosition;
						_animateToInterval = setInterval(animateToPosition, settings.animateInterval);
					}
				};
				$this[0].scrollTo = scrollTo;
				
				$this[0].scrollBy = function(delta)
				{
					var currentPos = -parseInt($pane.css('top')) || 0;
					scrollTo(currentPos + delta);
				};
				
				initDrag();
				
				scrollTo(-currentScrollPosition, true);
				
				jQuery.jScrollPane.active.push($this[0]);

			} else {
				$this.css(
					{
						'height':paneHeight+'px',
						'width':paneWidth-this.originalSidePaddingTotal+'px',
						'padding':this.originalPadding
					}
				);
				// remove from active list?
			}
			
		}
	)
};

// clean up the scrollTo expandos
jQuery(window)
	.bind('unload', function() {
		var els = jQuery.jScrollPane.active; 
		for (var i=0; i<els.length; i++) {
			els[i].scrollTo = els[i].scrollBy = null;
		}
	}
);