/*
	 * jQuery UI Magnifier 1.6rc2

	 *
	 * Copyright (c) 2008 jQuery
	 * Dual licensed under the MIT (MIT-LICENSE.txt)
	 * and GPL (GPL-LICENSE.txt) licenses.
	 *
	 * http://docs.jquery.com/UI/Magnifier
	 *
	 * Depends:
	 *  ui.core.js
	 */
	(function($) {

	var counter = 0;

	$.widget("ui.magnifier", {
		_init: function() {
			var self = this,
				o = this.options;
			this.element
				.addClass("ui-magnifier")
				.bind('click.magnifier', function(e) {
					(!self.disabled && o.click && o.click.apply(this, [e, {
						options: self.options,
						current: self.current[0],
						currentOffset: self.current[1]
					}]));
				});

			// the element must have relative or absolute positioning
			if (!(/^(r|a)/).test(this.element.css("position"))) {
				this.element.css("position", "relative");
			}

			this.items = [];
			this.element.find(o.items).each(function() {
				var $this = $(this);
				// TODO: use a hash so references to this data is readable
				self.items.push([
					this,
					$this.offset(),
					[$this.width(),$this.height()],
					(o.overlap ? $this.position() : null)
				]);

				(o.opacity && $this.css('opacity', o.opacity.min));
			});

			// absolutize
			(o.overlap && $.each(this.items, function() {
				$(this[0]).css({
					position: "absolute",
					top: this[3].top,
					left: this[3].left
				});
			}));

			this.identifier = ++counter;
			


			$(document).bind("mousemove.magnifier"+this.identifier, function(e) {
				(self.disabled || self._magnify.apply(self, [e]));
			});

			this.pp = this.element.offset();
		},
		
		reapply: function() { // added this to work with the carousel
			this.pp = this.element.offset();
		},

		destroy: function() {
			this.reset();
			this.element
				.removeClass("ui-magnifier ui-magnifier-disabled")
				.unbind(".magnifier");
			$(document).unbind("mousemove.magnifier"+this.identifier);
			
		},

		disable: function() {
			this.reset();
			$.widget.prototype.disable.apply(this, arguments);
		},
		
		reset: function(e) {
			var o = this.options;
			
			this.element
				.unbind(".magnifier");
			
			$.each(this.items, function() {
				var item = this;
				$(item[0]).css({
					width: item[2][0],
					height: item[2][1],
					top: (item[3] ? item[3].top : 0),
					left: (item[3] ? item[3].left : 0)
				});
				

				(o.opacity && $(item[0]).css('opacity', o.opacity.min));
				(o.zIndex && $(item[0]).css("z-index", ""));
			});
		},

		_magnify: function(e) {
			var p = [e.pageX,e.pageY], o = this.options, c, distance = 1;
			this.current = this.items[0];

			// Compute the parent's distance
			// we don't need to fire anything if we are not near the parent
			var overlap = ((p[0] > this.pp.left-o.distance) &&
				(p[0] < this.pp.left + this.element[0].offsetWidth + o.distance) &&
				(p[1] > this.pp.top-o.distance) &&
				(p[1] < this.pp.top + this.element[0].offsetHeight + o.distance));
			if (!overlap) { return false; }

			for (var i=0; i<this.items.length; i++) {
				c = this.items[i];

				var olddistance = distance;
				if (!o.axis) {
					distance = Math.sqrt(
						  Math.pow(p[0] - ((c[3] ? this.pp.left : c[1].left) + parseInt(c[0].style.left,10)) - (c[0].offsetWidth/2), 2)
						+ Math.pow(p[1] - ((c[3] ? this.pp.top  : c[1].top ) + parseInt(c[0].style.top,10)) - (c[0].offsetHeight/2), 2)
					);
				} else {
					if(o.axis == "y") {
						distance = Math.abs(p[1] - ((c[3] ? this.pp.top  : c[1].top ) + parseInt(c[0].style.top,10)) - (c[0].offsetHeight/2));
					} else {
						distance = Math.abs(p[0] - ((c[3] ? this.pp.left : c[1].left) + parseInt(c[0].style.left,10)) - (c[0].offsetWidth/2));
					}
				}

				if (distance < o.distance) {
					this.current = distance < olddistance ? c : this.current;

					if (!o.axis || o.axis != "y") {
						$(c[0]).css({
							width: c[2][0]+ (c[2][0] * (o.magnification-1)) - (((distance/o.distance)*c[2][0]) * (o.magnification-1)),
							left: (c[3] ? (c[3].left + o.verticalLine * ((c[2][1] * (o.magnification-1)) - (((distance/o.distance)*c[2][1]) * (o.magnification-1)))) : 0)
						});
					}

					if (!o.axis || o.axis != "x") {
						$(c[0]).css({
							height: c[2][1]+ (c[2][1] * (o.magnification-1)) - (((distance/o.distance)*c[2][1]) * (o.magnification-1)),
							top: (c[3] ? c[3].top : 0) + (o.baseline-0.5) * ((c[2][0] * (o.magnification-1)) - (((distance/o.distance)*c[2][0]) * (o.magnification-1)))
						});
					}

					if (o.opacity) {
						$(c[0]).css('opacity', o.opacity.max-(distance/o.distance) < o.opacity.min ? o.opacity.min : o.opacity.max-(distance/o.distance));
					}
				} else {
					$(c[0]).css({
						width: c[2][0],
						height: c[2][1],
						top: (c[3] ? c[3].top : 0),
						left: (c[3] ? c[3].left : 0)
					});

					(o.opacity && $(c[0]).css('opacity', o.opacity.min));
				}

				(o.zIndex && $(c[0]).css("z-index", ""));
			}

			(o.zIndex && $(this.current[0]).css("z-index", o.zIndex));
		}
	});

	$.extend($.ui.magnifier, {
		defaults: {
			distance: 150,
			magnification: 2,
			baseline: 0,
			verticalLine: -0.5,
			items: "> *"
		}
		
	});

	
	})(jQuery);