/*!
 * tools.scrollable @VERSION - Scroll your HTML with eye candy.
 * 
 * Copyright (c) 2009 Tero Piirainen
 * http://flowplayer.org/tools/scrollable.html
 *
 * Dual licensed under MIT and GPL 2+ licenses
 * http://www.opensource.org/licenses
 *
 * Launch  : March 2008
 * Date: @DATE
 * Revision: @REVISION 
 */
(function($) {
	// static constructs
	$.tools = $.tools || {version: {}};
	$.tools.version.scrollable = '@VERSION';

	var current = null;		
	function find(query, ctx) {
		return query.indexOf("#") != -1 ? $(query).eq(0) : ctx.siblings(query).eq(0);	
	}		
	
	// constructor
	function Scrollable(root, conf) {   

		// current instance
		var self = this;  
		if (!current) { current = self; }		
		
		// generic binding function
		function bind(name, fn) {
			$(self).bind(name, function(e, args)  {
				if (fn && fn.call(this, args.index) === false && args) {
					args.proceed = false;	
				}	
			});	 
			return self;
		}
		
		// bind all callbacks from configuration
		$.each(conf, function(name, fn) {
			if ($.isFunction(fn)) { bind(name, fn); }
		});   
		
		
		// horizontal flag
		var horizontal = !conf.vertical;				
		
		// wrap (root elements for items)
		var wrap = $(conf.items, root);				
		
		// current index
		var index = 0;			

		
		// get handle to navigational elements
		var prev = find(conf.prev, root);
		var next = find(conf.next, root);
		var prevPage = find(conf.prevPage, root);
		var nextPage = find(conf.nextPage, root);
		
		// when single entry 
		var forward;
		
		// methods
		$.extend(self, {
			
			getIndex: function() {
				return index;	
			},
	
			getConf: function() {
				return conf;	
			},
			
			getSize: function() {
				return self.getItems().size();	
			},
	
			getPageAmount: function() {
				return Math.ceil(this.getSize() / conf.size); 	
			},
			
			getPageIndex: function() {
				return Math.ceil(index / conf.size);	
			},

			getNaviButtons: function() {
				return prev.add(next).add(prevPage).add(nextPage);	
			},
			
			getRoot: function() {
				return root;	
			},
			
			getItemWrap: function() {
				return wrap;	
			},
			
			getItems: function() {
				return wrap.children();	
			},
			
			getVisibleItems: function() {
				return self.getItems().slice(index, index + conf.size);	
			},
			
			/* all seeking functions depend on this */		
			seekTo: function(i, time, fn) {
				
				// default speed
				if (time === undefined) { time = conf.speed; }
				
				// function given as second argument
				if ($.isFunction(time)) {
					fn = time;
					time = conf.speed;
				} 
				
				if (i < 0) { i = 0; }				
				if (i > self.getSize() - conf.size) { return self; } 				

				var item = self.getItems().eq(i);					
				if (!item.length) { return self; }				
				
				
				// onBeforeSeek
				var p = {index: i, proceed: true};
				$(self).trigger("onBeforeSeek", p);				
				if (!p.proceed) { return self; }
									
				
				if (horizontal) {
 					var left = -item.position().left;					
					wrap.animate({left: left}, time, conf.easing, fn ? function() { fn.call(self); } : null);
					
				} else {
					var top = -item.position().top;										
					wrap.animate({top: top}, time, conf.easing, fn ? function() { fn.call(self); } : null);							
				}					

				
				// prev buttons disabled flag
				if (i === 0) {
					prev.add(prevPage).addClass(conf.disabledClass);					
				} else {
					prev.add(prevPage).removeClass(conf.disabledClass);
				}
								
				// next buttons disabled flag
				if (i >= self.getSize() - conf.size) {
					next.add(nextPage).addClass(conf.disabledClass);
				} else {
					next.add(nextPage).removeClass(conf.disabledClass);
				}				
				
				current = self;
				index = i;				
				
				// onSeek after index being updated
				$(self).trigger("onSeek", {index: i});				
				return self; 
			},			
			
				
			move: function(offset, time, fn) {
				return this.seekTo(index + offset, time, fn);
			},
			
			next: function(time, fn) {
				return this.move(1, time, fn);	
			},
			
			prev: function(time, fn) {
				return this.move(-1, time, fn);	
			},
			
			movePage: function(offset, time, fn) {
				var steps = conf.size * offset;
				
				var i = index % conf.size;
				if (i > 0) {
				 	steps += (offset > 0 ? -i : conf.size - i);
				}
				return this.move(steps, time, fn);		
			},
			
			prevPage: function(time, fn) {
				return this.movePage(-1, time, fn);
			},  
	
			nextPage: function(time, fn) {
				return this.movePage(1, time, fn);
			},			
			
			setPage: function(page, time, fn) { 
				page -= this.getPageIndex();
				return this.movePage(page);
			},			
			
			begin: function(time, fn) {
				return this.seekTo(0, time, fn);	
			},
			
			end: function(time, fn) {
				return this.seekTo(this.getSize() - conf.size, time, fn);	
			},
			
			reload: function() {				
				return $(self).trigger("onReload", {});
			},

			// callback functions
			onBeforeSeek: function(fn) {
				return bind("onBeforeSeek", fn); 		
			},
			
			onSeek: function(fn) {
				return bind("onSeek", fn); 		
			},
			
			onReload: function(fn) {
				return bind("onReload", fn); 		
			},
			
			click: function(i) {
		
				var item = self.getItems().eq(i);
				var klass = conf.activeClass;			
				
				// check that i is sane
				if (i < 0 || i >= self.getSize()) { return self; }
				
				// size == 1							
				if (size == 1) {
					if (i == 0 || i == self.getSize() -1)  { 
						forward = (forward === undefined) ? true : !forward;	 
					}
					return forward ? self.next() : self.prev(); 
				} 
				
				// size == 2
				if (size == 2) {
					if (i == index) { i--; }
					self.getItems().removeClass(klass);
					item.addClass(klass);					
					return self.seekTo(i, time, fn);
				}				
		
				if (!item.hasClass(klass)) {				
					self.getItems().removeClass(klass);
					item.addClass(klass);
					var delta = Math.floor(size / 2);
					var to = i - delta;
		
					// next to last item must work
					if (to > self.getSize() - size) { 
						to = self.getSize() - size; 
					}
		
					if (to !== i) {
						return self.seekTo(to);		
					}
				}
				
				return self;
			}   
			
		});
			
		// prev button		
		prev.addClass(conf.disabledClass).click(function() { 
			self.prev(); 
		});
		

		// next button
		next.click(function() { 
			self.next(); 
		});
		
		// prev page button
		nextPage.click(function() { 
			self.nextPage(); 
		});
		

		// next page button
		prevPage.addClass(conf.disabledClass).click(function() { 
			self.prevPage(); 
		});		

		
		// keyboard
		if (conf.keyboard) {			

			// keyboard works on one instance at the time. thus we need to unbind first
			$(document).unbind("keydown.scrollable").bind("keydown.scrollable", function(evt) {
				
				var el = current;	
				if (!el || evt.altKey || evt.ctrlKey) { return; }
					
				if (horizontal && (evt.keyCode == 37 || evt.keyCode == 39)) {					
					el.move(evt.keyCode == 37 ? -1 : 1);
					return evt.preventDefault();
				}	
				
				if (!horizontal && (evt.keyCode == 38 || evt.keyCode == 40)) {
					el.move(evt.keyCode == 38 ? -1 : 1);
					return evt.preventDefault();
				}
				
				return true;
				
			});	 
		}
		
		// hover
		var hc = conf.hoverClass; 
		if (hc || conf.clickable) {
			
			self.onReload(function() { 

				// hovering
				if (hc) {
					self.getItems().hover(function()  {
						$(this).addClass(hc);		
					}, function() {
						$(this).removeClass(hc);	
					});						
				}
				
				// clickable
				if (conf.clickable) {
					self.getItems().each(function(i) {
						$(this).unbind("click.scrollable").bind("click.scrollable", function() {
							self.click(i);		
						});
					});
				}

			});
			
			self.reload();
		}
		
	} 

		
	// jQuery plugin implementation
	$.fn.scrollable = function(conf) { 
			
		// already constructed --> return API
		var el = this.eq(typeof conf == 'number' ? conf : 0).data("scrollable");
		if (el) { return el; }		
		
 
		var opts = {
			
			// basics
			size: 5,
			vertical:false,
			speed: 400,
			keyboard: true,			
			
			// other
			disabledClass: 'disabled',
			hoverClass: null,		
			clickable: true,
			activeClass: 'active', 
			easing: 'swing',
			
			// navigational elements
			items: '.items-bd',
			prev: '.prev',
			next: '.next',
			prevPage: '.prevPage',
			nextPage: '.nextPage',
			api:false,

			
			// callbacks
			onBeforeSeek: null,
			onSeek: null 
		}; 
		
		
		$.extend(opts, conf);		
		
		this.each(function() {			
			el = new Scrollable($(this), opts);
			$(this).data("scrollable", el);	
		});
		
		return opts.api ? el: this; 
		
	};
			
	
})(jQuery);
/*=========================================*/
(function($) {

	// ALTERED: getItems, getSize
		
	$.fn.circular = function()  {
	
		return this.each(function() {			
 
			var api = $(this).scrollable(), 
				 items = api.getItems(), 
				 conf = api.getConf(), 
				 wrap = api.getItemWrap(), 
				 index = 0;				
				
			// too few items. no need for this plugin.
			if (items.length < conf.size) { return false; }
			

			// clone first visible elements and append them to the end			
			items.slice(0, conf.size).each(function(i) {
  				$(this).clone().appendTo(wrap).click(function()  {
					api.click(items.length + i);		
				});			
			});			
			
			// clone last set of elements to the beginning in reversed order
			var tail = $.makeArray(items.slice(-conf.size)).reverse();
			
  			$(tail).each(function(i) {
				$(this).clone().prependTo(wrap).click(function()  {
					api.click(-i -1);			
				});				
			});
			
			// skip the clones at the beginning
			api.seekTo(conf.size, 0);	


			// overridden scrollable API methods
			$.extend(api, {
				move: function(offset, time, fn) {
					
					var to = index + offset + conf.size;				
					var exceed = to > api.getSize() - conf.size;
					
					if (to < 0 || exceed) {
						var fix = index + conf.size + (exceed ? -items.length : items.length); 
						api.seekTo(fix, 0);					
						to = fix + offset;					  
					} 
								
					return api.seekTo(to, time, fn);
				},			
				
				begin: function(time, fn) {
					return this.seekTo(conf.size, time, fn);	
				},
				
				end: function(time, fn) {				
					return this.seekTo(items.length, time, fn);	
				},
	
				click: function(i, time, fn) {				
					var to = i - index;				
					to -= Math.floor(conf.size / 2);
					return this.move(to, time, fn);
				},
	
				getIndex: function() {
					if (index < 0) { return items.length + index; } 
					if (index >= items.length) { return 0; }
					return index;	
				},
	
				getPageAmount: function()  {
					return Math.ceil(items.length / conf.size);		
				},
				
				getPageIndex: function()  {
					var i = api.getIndex();
					return Math.ceil((i - i % conf.size) / conf.size);		
				}	
				
			});  
			
			// navi buttons are never disabled 
			api.onSeek(function(i) {		
				index = i - conf.size;
				
				// navi buttons are never disabled
				api.getNaviButtons().removeClass(conf.disabledClass);
			});	
			
				
		});
		
	}

		
})(jQuery);
/*=========================================*/		
(function($) {
	// helper function
	function find(query, ctx) {
		return query.indexOf("#") != -1 ? $(query).eq(0) : ctx.siblings(query).eq(0);	
	}
	// jQuery plugin implementation
	$.fn.navigator = function(opts) {
		var conf = {
			navi: '.scroll-navi',
			naviItem: 'a',		
			activeClass: 'scroll-navi-active'
		};
		$.extend(conf, opts);
		
		return this.each(function() {
				
			var api = $(this).scrollable(), 
				 root = api.getRoot(), 
				 navi = find(conf.navi, root),
				 buttons = api.getNaviButtons();

					
			api.getNaviButtons = function() {
				return buttons.add(navi);	
			};
				 
				
			// generate new entries
			function reload() {
				
				if (navi.is(":empty") || navi.data("navi") == this) {
					
					navi.empty();
					navi.data("navi", this);
					
					for (var i = 0; i < api.getPageAmount(); i++) {		
						
						var item = $("<" + conf.naviItem + "/>").attr("href", i).click(function(e) {							
							var el = $(this);
							el.parent().children().removeClass(conf.activeClass);
							el.addClass(conf.activeClass);
							api.setPage(el.attr("href"));
							return e.preventDefault();
						});
						
						// activate first entry
						if (i === 0) { 
							item.addClass(conf.activeClass); 
						}
						
						navi.append(item);					
					}
					
				// assign onClick events to existing entries
				} else {
					
					// find a entries first -> syntaxically correct
					var els = navi.children(); 
					
					els.each(function(i)  {
						var el = $(this);
						if (i === 0) { el.addClass(conf.activeClass); }
						
						el.click(function(evt) {
							navi.find("." + conf.activeClass).removeClass(conf.activeClass);
							el.addClass(conf.activeClass);
							api.setPage(i);
							return evt.preventDefault();						
						});
						
					});
				}
			}
			
			// activate correct entry
			api.onSeek(function(index) {
				var cls = conf.activeClass;
				navi.children().removeClass(cls).eq(api.getPageIndex()).addClass(cls);						
			});
			
			api.onReload(function() {
				reload();		
			});
			
			reload();
			
		});		
	};
	
})(jQuery);			
/*=========================================*/
(function($) {		
		
	// jQuery plugin implementation
	$.fn.autoscroll = function(conf) { 
		
		var opts = {
			autoplay: true,
			interval: 1000,
			autopause: true,
			steps: 1
		};  
		
		if (typeof conf == 'number') {
			conf = {interval: conf};	
		}
		
		$.extend(opts, conf);		
		
		return this.each(function() {		
				
			var api = $(this).scrollable();	

			// interval stuff
			var timer = null, stopped = false;
	
			api.play = function() {
	
				// do not start additional timer if already exists
				if (timer) { return; }
				
				stopped = false;
				
				// construct new timer
				timer = setInterval(function() { 
					api.move(opts.steps);				
				}, opts.interval);
				
				api.move(opts.steps);
			};	

			api.pause = function() {
				timer = clearInterval(timer);	
			};
			
			// when stopped - mouseover won't restart 
			api.stop = function() {
				api.pause();
				stopped = true;	
			};
		
			/* when mouse enters, autoscroll stops */
			if (opts.autopause) {
				api.getRoot().add(api.getNaviButtons()).hover(function() {			
					api.pause();
					
				}, function() {
					if (!stopped) { api.play() };
				});
			}
			
			
			if (opts.autoplay) {
				setTimeout(function() {
					api.play(); 			
				}, opts.interval);				
			}
			
		});  
	}; 
	
})(jQuery);		
/*=========================================*/
(function($) {
		
	$.fn.wheel = function( fn ){
		return this[ fn ? "bind" : "trigger" ]( "wheel", fn );
	};

	// special event config
	$.event.special.wheel = {
		setup: function(){
			$.event.add( this, wheelEvents, wheelHandler, {} );
		},
		teardown: function(){
			$.event.remove( this, wheelEvents, wheelHandler );
		}
	};

	// events to bind ( browser sniffed... )
	var wheelEvents = !$.browser.mozilla ? "mousewheel" : // IE, opera, safari
		"DOMMouseScroll"+( $.browser.version<"1.9" ? " mousemove" : "" ); // firefox

	// shared event handler
	function wheelHandler( event ){
		
		switch ( event.type ){
			
			// FF2 has incorrect event positions
			case "mousemove": 
				return $.extend( event.data, { // store the correct properties
					clientX: event.clientX, clientY: event.clientY,
					pageX: event.pageX, pageY: event.pageY
				});
				
			// firefox	
			case "DOMMouseScroll": 
				$.extend( event, event.data ); // fix event properties in FF2
				event.delta = -event.detail / 3; // normalize delta
				break;
				
			// IE, opera, safari	
			case "mousewheel": 
				event.delta = event.wheelDelta / 120;
				break;
		}
		
		event.type = "wheel"; // hijack the event	
		return $.event.handle.call( this, event, event.delta );
	};
	
	
	// scrollable mousewheel implementation
	$.fn.mousewheel = function(speed) {
		
		return this.each(function() {		
			var api = $(this).scrollable();
			
			api.getRoot().bind("wheel.scrollable", function(e, delta)  { 
				api.move(delta < 0 ? 1 : -1, speed || 50);
				return false;
			});
		});
	}  
	
})(jQuery);