/**
 * jCarousel - Riding carousels with jQuery
 *   http://sorgalla.com/jcarousel/
 *
 * Copyright (c) 2006 Jan Sorgalla (http://sorgalla.com)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * Built on top of the jQuery library
 *   http://jquery.com
 *
 * Inspired by the "Carousel Component" by Bill Scott
 *   http://billwscott.com/carousel/
 */
jQuery.fn.extend({
	jcarousel: function (o) {
		return this.each(function () {
			new jQuery.jcarousel(this, o)
		})
	}
});
jQuery.extend({
	jcarousel: function (e, o) {
		var publ = this;
		publ.scope = function () {
			return priv.scope
		};
		publ.list = function () {
			return priv.list
		};
		publ.size = function () {
			return priv.size
		};
		publ.init = function (o) {
			return priv.init(o)
		};
		publ.get = function (idx) {
			return priv.get(idx)
		};
		publ.add = function (idx, html) {
			return priv.add(idx, html)
		};
		publ.available = function (first, last) {
			return last == undefined ? priv.end >= first : priv.end >= last
		};
		publ.loaded = function () {
			priv.loaded()
		};
		publ.next = function () {
			priv.next()
		};
		publ.prev = function () {
			priv.prev()
		};
		publ.scroll = function (i) {
			if (publ.available(i)) {
				priv.scroll(i)
			}
		};
		var priv = {
			o: {
				orientation: "horizontal",
				itemStart: 1,
				itemVisible: 3,
				itemScroll: null,
				scrollAnimation: "fast",
				autoScroll: 0,
				autoScrollStopOnInteract: true,
				autoScrollStopOnMouseover: false,
				autoScrollResumeOnMouseout: false,
				wrap: false,
				wrapPrev: false,
				itemWidth: null,
				itemHeight: null,
				loadItemHandler: null,
				nextButtonStateHandler: null,
				prevButtonStateHandler: null,
				itemFirstInHandler: null,
				itemFirstOutHandler: null,
				itemLastInHandler: null,
				itemLastOutHandler: null,
				itemVisibleInHandler: null,
				itemVisibleOutHandler: null,
				noButtons: false,
				buttonNextHTML: '<button type="button">&gt;&gt;</button>',
				buttonPrevHTML: '<button type="button">&lt;&lt;</button>'
			},
			scope: null,
			list: null,
			horiz: true,
			top: 0,
			left: 0,
			size: 0,
			end: 0,
			first: 0,
			prevFirst: 0,
			last: 0,
			prevLast: 0,
			inAnimation: false,
			autoTimer: null,
			nextClick: function () {
				priv.next()
			},
			prevClick: function () {
				priv.prev()
			},
			itemFormat: {
				"float": "left",
				"styleFloat": "left",
				"overflow": "hidden",
				"listStyle": "none"
			},
			options: function (o) {
				if (o) jQuery.extend(priv.o, o);
				priv.o.itemStart = Math.max(1, priv.intval(priv.o.itemStart));
				priv.o.itemScroll = priv.o.itemScroll || priv.o.itemVisible;
				if (priv.o.itemWidth) priv.itemFormat.width = priv.o.itemWidth + "px";
				if (priv.o.itemHeight) priv.itemFormat.height = priv.o.itemHeight + "px";
				priv.horiz = priv.o.orientation == "vertical" ? false : true
			},
			init: function (o) {
				priv.options(o);
				if (priv.size == 0) {
					var dummy = priv.format(document.createElement("li"), 1).get(0);
					priv.list.appendChild(dummy)
				}
				var i = jQuery("li", priv.list).get(0);
				var itemWidth = i.offsetWidth + priv.margin(i, "marginLeft") + priv.margin(i, "marginRight");
				var itemHeight = i.offsetHeight + priv.margin(i, "marginTop") + priv.margin(i, "marginBottom");
				if (priv.horiz) {
					priv.dimension = itemWidth;
					var clipW = itemWidth * priv.o.itemVisible - priv.margin(i, "marginRight");
					var clipH = itemHeight
				} else {
					priv.dimension = itemHeight;
					var clipW = itemWidth;
					var clipH = itemHeight * priv.o.itemVisible - priv.margin(i, "marginBottom")
				}
				jQuery(".jcarousel-clip", priv.scope).css({
					"zIndex": "2",
					"padding": 0,
					"margin": 0,
					"width": clipW + "px",
					"height": clipH + "px",
					"overflow": "hidden",
					"position": "relative"
				});
				if (dummy != undefined) priv.list.removeChild(dummy);
				priv.resize()
			},
			prepare: function (e, o) {
				priv.options(o);
				if (e.nodeName == "UL" || e.nodeName == "OL") {
					priv.list = e;
					var scope = jQuery(priv.list).parent().get(0);
					if ($(scope).hasClass("jcarousel-clip")) {
						if (!$(jQuery(scope).parent().get(0)).hasClass("jcarousel-scope")) scope = jQuery(scope).wrap('<div class="jcarousel-scope"></div>');
						scope = jQuery(scope).parent().get(0)
					} else if (!$(scope).hasClass("jcarousel-scope")) scope = jQuery(priv.list).wrap('<div class="jcarousel-scope"></div>').parent().get(0);
					priv.scope = scope
				} else {
					priv.scope = e;
					priv.list = jQuery("ul", priv.scope).get(0) || jQuery("ol", priv.scope).get(0)
				}
				priv.size = priv.end = jQuery("li", priv.list).size();
				if (priv.size > 0) {
					var idx = 1;
					jQuery("li", priv.list).each(function () {
						priv.format(this, idx++)
					})
				}
				if (!$(jQuery(priv.list).parent().get(0)).hasClass("jcarousel-clip")) jQuery(priv.list).wrap('<div class="jcarousel-clip"></div>');
				if (!priv.o.noButtons) {
					if (jQuery(".jcarousel-prev", priv.scope).size() == 0) {
						var dummy = jQuery(document.createElement("div")).html(priv.o.buttonPrevHTML).get(0);
						jQuery(".jcarousel-clip", priv.scope).before(jQuery(dummy.firstChild).addClass("jcarousel-prev"))
					}
					if (jQuery(".jcarousel-next", priv.scope).size() == 0) {
						var dummy = jQuery(document.createElement("div")).html(priv.o.buttonNextHTML).get(0);
						jQuery(".jcarousel-clip", priv.scope).before(jQuery(dummy.firstChild).addClass("jcarousel-next"))
					}
					jQuery(".jcarousel-prev", priv.scope).css({
						"zIndex": "3"
					});
					jQuery(".jcarousel-next", priv.scope).css({
						"zIndex": "3"
					})
				}
				if (priv.o.autoScrollStopOnMouseover) {
					if (priv.o.autoScrollResumeOnMouseout) {
						jQuery(".jcarousel-clip", priv.scope).bind("mouseover", function () {
							priv.stopAuto()
						}).bind("mouseout", function () {
							priv.startAuto()
						})
					} else {
						jQuery(".jcarousel-clip", priv.scope).bind("mouseover", function () {
							priv.disableAuto()
						})
					}
				}
				priv.top = priv.intval(jQuery(priv.list).css("top"));
				priv.left = priv.intval(jQuery(priv.list).css("left"));
				jQuery(priv.list).css({
					"zIndex": "1",
					"position": "relative",
					"top": priv.top + "px",
					"left": priv.left + "px",
					"margin": 0,
					"padding": 0
				}).addClass("jcarousel-list");
				jQuery(priv.scope).addClass("jcarousel-scope").show();
				jQuery(":hidden", priv.scope).show()
			},
			get: function (idx) {
				return jQuery(".jcarousel-item-" + idx, priv.list)
			},
			add: function (idx, s) {
				var item = priv.get(idx);
				if (item.size() == 0) {
					var item = priv.format(document.createElement("li"), idx);
					jQuery(priv.list).append(item);
					priv.size++;
					if (priv.size > priv.end) priv.end = priv.size;
					priv.resize()
				}
				return item.html(s)
			},
			available: function (first, last) {
				if (priv.end >= last) return true;
				priv.end = last;
				return false
			},
			load: function (first, last) {
				if (priv.o.loadItemHandler == null) return priv.loaded();
				priv.buttons(false, false);
				priv.o.loadItemHandler(publ, first, last, priv.available(first, last))
			},
			loaded: function () {
				if (priv.first > 1 && priv.last < priv.size) {
					priv.buttons(true, true)
				} else if (priv.first == 1 && priv.last < priv.size) {
					priv.buttons(true, priv.o.wrapPrev)
				} else if (priv.first > 1 && priv.last >= priv.size) {
					priv.buttons(priv.o.wrap, true)
				}
			},
			next: function () {
				priv.stopAuto();
				if (priv.o.autoScrollStopOnInteract) priv.disableAuto();
				priv.doNext()
			},
			doNext: function () {
				priv.scroll((priv.o.wrap && priv.last == priv.size) ? 1 : priv.first + priv.o.itemScroll);
				if (priv.o.wrap || priv.last < priv.size) priv.startAuto()
			},
			prev: function () {
				priv.stopAuto();
				if (priv.o.autoScrollStopOnInteract) priv.disableAuto();
				priv.doPrev()
			},
			doPrev: function () {
				priv.scroll((priv.o.wrapPrev && priv.first == 1) ? priv.size - priv.o.itemVisible + 1 : priv.first - priv.o.itemScroll);
				priv.startAuto()
			},
			scroll: function (idx) {
				if (priv.inAnimation) return;
				priv.inAnimation = false;
				priv.prevFirst = priv.first;
				priv.prevLast = priv.last;
				idx = idx < 1 ? 1 : idx;
				var last = idx + priv.o.itemVisible - 1;
				last = (last > priv.size) ? priv.size : last;
				var first = last - priv.o.itemVisible + 1;
				first = (first < 1) ? 1 : first;
				last = first + priv.o.itemVisible - 1;
				priv.first = first;
				priv.last = last;
				priv.animate()
			},
			animate: function () {
				var pos = priv.dimension * (priv.first - 1) * -1;
				priv.notify(priv.prevFirst, priv.prevLast, priv.first, priv.last, "onBeforeAnimation");
				if (priv.o.scrollAnimation) {
					priv.inAnimation = true;
					jQuery(priv.list).animate(priv.horiz ? {
						"left": pos
					} : {
						"top": pos
					}, priv.o.scrollAnimation, function () {
						priv.scrolled()
					})
				} else {
					jQuery(priv.list).css(priv.horiz ? "left" : "top", pos + "px");
					priv.scrolled()
				}
			},
			scrolled: function () {
				if (priv.first == 1) jQuery(priv.list).css("top", priv.top + "px").css("left", priv.left + "px");
				priv.inAnimation = false;
				priv.notify(priv.prevFirst, priv.prevLast, priv.first, priv.last, "onAfterAnimation");
				priv.load(priv.last + 1, priv.last + priv.o.itemScroll)
			},
			handler: function (handler, evt, state, i1, i2, i3, i4) {
				if (priv.o[handler] == undefined || (typeof priv.o[handler] != 'object' && evt != "onAfterAnimation")) return;
				var handler = typeof priv.o[handler] == 'object' ? priv.o[handler][evt] : priv.o[handler];
				if (typeof handler != 'function') return;
				if (i2 == undefined) {
					priv.get(i1).each(function () {
						handler(publ, this, i1, state)
					});
					return
				}
				for (var i = i1; i <= i2; i++) {
					if (! (i >= i3 && i <= i4)) priv.get(i).each(function () {
						handler(publ, this, i, state)
					})
				}
			},
			notify: function (prevFirst, prevLast, first, last, evt) {
				var state = prevFirst == 0 ? "init" : (prevFirst < first ? "next" : "prev");
				if (prevFirst != first) {
					priv.handler("itemFirstOutHandler", evt, state, prevFirst);
					priv.handler("itemFirstInHandler", evt, state, first)
				}
				if (prevLast != last) {
					priv.handler("itemLastOutHandler", evt, state, prevLast);
					priv.handler("itemLastInHandler", evt, state, last)
				}
				priv.handler("itemVisibleInHandler", evt, state, first, last, prevFirst, prevLast);
				priv.handler("itemVisibleOutHandler", evt, state, prevFirst, prevLast, first, last)
			},
			buttons: function (next, prev) {
				if (priv.o.noButtons) return;
				jQuery(".jcarousel-next", priv.scope)[next ? "bind" : "unbind"]("click", priv.nextClick)[next ? "removeClass" : "addClass"]("jcarousel-next-disabled")[next ? "removeAttr" : "attr"]("disabled", true);
				jQuery(".jcarousel-prev", priv.scope)[prev ? "bind" : "unbind"]("click", priv.prevClick)[prev ? "removeClass" : "addClass"]("jcarousel-prev-disabled")[prev ? "removeAttr" : "attr"]("disabled", true);
				if (priv.o.nextButtonStateHandler != null) jQuery(".jcarousel-next", priv.scope).each(function () {
					priv.o.nextButtonStateHandler(publ, this, next)
				});
				if (priv.o.prevButtonStateHandler != null) jQuery(".jcarousel-prev", priv.scope).each(function () {
					priv.o.prevButtonStateHandler(publ, this, prev)
				})
			},
			startAuto: function () {
				if (priv.o.autoScroll > 0) priv.autoTimer = setTimeout(function () {
					priv.doNext()
				}, priv.o.autoScroll * 1000)
			},
			stopAuto: function () {
				if (priv.autoTimer == null) return;
				clearTimeout(priv.autoTimer);
				priv.autoTimer = null
			},
			disableAuto: function () {
				priv.stopAuto();
				priv.o.autoScroll = 0
			},
			resize: function () {
				if (priv.size == 0) return;
				if (priv.horiz) jQuery(priv.list).css("width", priv.size * priv.dimension + 100 + "px");
				else jQuery(priv.list).css("height", priv.size * priv.dimension + 100 + "px")
			},
			format: function (item, idx) {
				return jQuery(item).css(priv.itemFormat).addClass("jcarousel-item-" + idx)
			},
			margin: function (e, p) {
				if (p == "marginRight" && jQuery.browser.safari) {
					var old = {
						"display": "block",
						"float": "none",
						"width": "auto"
					},
						oWidth, oWidth2;
					jQuery.swap(e, old, function () {
						oWidth = e.offsetWidth
					});
					old["marginRight"] = 0;
					jQuery.swap(e, old, function () {
						oWidth2 = e.offsetWidth
					});
					return oWidth2 - oWidth
				}
				return priv.intval(jQuery.css(e, p))
			},
			intval: function (v) {
				v = parseInt(v);
				return isNaN(v) ? 0 : v
			}
		};
		priv.prepare(e, o);
		priv.init();
		priv.buttons(false, false);
		priv.load(1, priv.o.itemStart + priv.o.itemVisible);
		priv.scroll(priv.o.itemStart);
		priv.startAuto()
	}
});