(function($) {

	//Make nodes selectable by expression
	$.extend($.expr[':'], { draggable: "(' '+a.className+' ').indexOf(' ui-draggable ')" });


	//Macros for external methods that support chaining
	var methods = "destroy,enable,disable".split(",");
	for(var i=0;i<methods.length;i++) {
		var cur = methods[i], f;
		eval('f = function() { var a = arguments; return this.each(function() { if(jQuery(this).is(".ui-draggable")) jQuery.data(this, "ui-draggable")["'+cur+'"](a); }); }');
		$.fn["draggable"+cur.substr(0,1).toUpperCase()+cur.substr(1)] = f;
	};
	
	//get instance method
	$.fn.draggableInstance = function() {
		if($(this[0]).is(".ui-draggable")) return $.data(this[0], "ui-draggable");
		return false;
	};

	$.fn.draggable = function(o) {
		return this.each(function() {
			new $.ui.draggable(this, o);
		});
	}
	
	$.ui.ddmanager = {
		current: null,
		droppables: [],
		prepareOffsets: function(t, e) {
			var dropTop = $.ui.ddmanager.dropTop = [];
			var dropLeft = $.ui.ddmanager.dropLeft;
			var m = $.ui.ddmanager.droppables;
			for (var i = 0; i < m.length; i++) {
				if(m[i].item.disabled) continue;
				m[i].offset = $(m[i].item.element).offset();
				if (t && m[i].item.options.accept(t.element)) //Activate the droppable if used directly from draggables
					m[i].item.activate.call(m[i].item, e);
			}
		},
		fire: function(oDrag, e) {
			
			var oDrops = $.ui.ddmanager.droppables;
			var oOvers = $.grep(oDrops, function(oDrop) {
				
				if (!oDrop.item.disabled && $.ui.intersect(oDrag, oDrop, oDrop.item.options.tolerance))
					oDrop.item.drop.call(oDrop.item, e);
			});
			$.each(oDrops, function(i, oDrop) {
				if (!oDrop.item.disabled && oDrop.item.options.accept(oDrag.element)) {
					oDrop.out = 1; oDrop.over = 0;
					oDrop.item.deactivate.call(oDrop.item, e);
				}
			});
		},
		update: function(oDrag, e) {
			
			if(oDrag.options.refreshPositions) $.ui.ddmanager.prepareOffsets();
			
			var oDrops = $.ui.ddmanager.droppables;
			var oOvers = $.grep(oDrops, function(oDrop) {
				if(oDrop.item.disabled) return false; 
				var isOver = $.ui.intersect(oDrag, oDrop, oDrop.item.options.tolerance)
				if (!isOver && oDrop.over == 1) {
					oDrop.out = 1; oDrop.over = 0;
					oDrop.item.out.call(oDrop.item, e);
				}
				return isOver;
			});
			$.each(oOvers, function(i, oOver) {
				if (oOver.over == 0) {
					oOver.out = 0; oOver.over = 1;
					oOver.item.over.call(oOver.item, e);
				}
			});
		}
	};
	
	$.ui.draggable = function(el, o) {
		
		var options = {};
		$.extend(options, o);
		var self = this;
		$.extend(options, {
			_start: function(h, p, c, t, e) {
				self.start.apply(t, [self, e]); // Trigger the start callback				
			},
			_beforeStop: function(h, p, c, t, e) {
				self.stop.apply(t, [self, e]); // Trigger the start callback
			},
			_drag: function(h, p, c, t, e) {
				self.drag.apply(t, [self, e]); // Trigger the start callback
			},
			startCondition: function(e) {
				return !(e.target.className.indexOf("ui-resizable-handle") != -1 || self.disabled);	
			}			
		});
		
		$.data(el, "ui-draggable", this);
		
		if (options.ghosting == true) options.helper = 'clone'; //legacy option check
		$(el).addClass("ui-draggable");
		this.interaction = new $.ui.mouseInteraction(el, options);
		
	}
	
	$.extend($.ui.draggable.prototype, {
		plugins: {},
		currentTarget: null,
		lastTarget: null,
		destroy: function() {
			$(this.interaction.element).removeClass("ui-draggable").removeClass("ui-draggable-disabled");
			this.interaction.destroy();
		},
		enable: function() {
			$(this.interaction.element).removeClass("ui-draggable-disabled");
			this.disabled = false;
		},
		disable: function() {
			$(this.interaction.element).addClass("ui-draggable-disabled");
			this.disabled = true;
		},
		prepareCallbackObj: function(self) {
			return {
				helper: self.helper,
				position: { left: self.pos[0], top: self.pos[1] },
				offset: self.options.cursorAt,
				draggable: self,
				options: self.options	
			}			
		},
		start: function(that, e) {
			
			var o = this.options;
			$.ui.ddmanager.current = this;
			
			$.ui.plugin.call(that, 'start', [e, that.prepareCallbackObj(this)]);
			$(this.element).triggerHandler("dragstart", [e, that.prepareCallbackObj(this)], o.start);
			
			if (this.slowMode && $.ui.droppable && !o.dropBehaviour)
				$.ui.ddmanager.prepareOffsets(this, e);
			
			return false;
						
		},
		stop: function(that, e) {			
			
			var o = this.options;
			
			$.ui.plugin.call(that, 'stop', [e, that.prepareCallbackObj(this)]);
			$(this.element).triggerHandler("dragstop", [e, that.prepareCallbackObj(this)], o.stop);

			if (this.slowMode && $.ui.droppable && !o.dropBehaviour) //If cursorAt is within the helper, we must use our drop manager
				$.ui.ddmanager.fire(this, e);

			$.ui.ddmanager.current = null;
			$.ui.ddmanager.last = this;

			return false;
			
		},
		drag: function(that, e) {

			var o = this.options;

			$.ui.ddmanager.update(this, e);

			this.pos = [this.pos[0]-o.cursorAt.left, this.pos[1]-o.cursorAt.top];

			$.ui.plugin.call(that, 'drag', [e, that.prepareCallbackObj(this)]);
			var nv = $(this.element).triggerHandler("drag", [e, that.prepareCallbackObj(this)], o.drag);

			var nl = (nv && nv.left) ? nv.left : this.pos[0];
			var nt = (nv && nv.top) ? nv.top : this.pos[1];
			
			$(this.helper).css('left', nl+'px').css('top', nt+'px'); // Stick the helper to the cursor
			return false;
			
		}
	});

})($);


/*
 * 'this' -> original element
 * 1. argument: browser event
 * 2.argument: ui object
 */

(function($) {

	$.ui.plugin.add("draggable", "stop", "effect", function(e,ui) {
		var t = ui.helper;
		if(ui.options.effect[1]) {
			if(t != this) {
				ui.options.beQuietAtEnd = true;
				switch(ui.options.effect[1]) {
					case 'fade':
						$(t).fadeOut(300, function() { $(this).remove(); });
						break;
					default:
						$(t).remove();
						break;	
				}
			}
		}
	});
	
	$.ui.plugin.add("draggable", "start", "effect", function(e,ui) {
		if(ui.options.effect[0]) {
			switch(ui.options.effect[0]) {
				case 'fade':
					$(ui.helper).hide().fadeIn(300);
					break;
			}
		}
	});

//----------------------------------------------------------------

	$.ui.plugin.add("draggable", "start", "cursor", function(e,ui) {
		var t = $('body');
		if (t.css("cursor")) ui.options.ocursor = t.css("cursor");
		t.css("cursor", ui.options.cursor);
	});

	$.ui.plugin.add("draggable", "stop", "cursor", function(e,ui) {
		if (ui.options.ocursor) $('body').css("cursor", ui.options.ocursor);
	});

//----------------------------------------------------------------
	
	$.ui.plugin.add("draggable", "start", "zIndex", function(e,ui) {
		var t = $(ui.helper);
		if(t.css("zIndex")) ui.options.ozIndex = t.css("zIndex");
		t.css('zIndex', ui.options.zIndex);
	});
	
	$.ui.plugin.add("draggable", "stop", "zIndex", function(e,ui) {
		if(ui.options.ozIndex) $(ui.helper).css('zIndex', ui.options.ozIndex);
	});


//----------------------------------------------------------------

	$.ui.plugin.add("draggable", "start", "opacity", function(e,ui) {
		var t = $(ui.helper);
		if(t.css("opacity")) ui.options.oopacity = t.css("opacity");
		t.css('opacity', ui.options.opacity);
	});
	
	$.ui.plugin.add("draggable", "stop", "opacity", function(e,ui) {
		if(ui.options.oopacity) $(ui.helper).css('opacity', ui.options.oopacity);
	});

//----------------------------------------------------------------

	$.ui.plugin.add("draggable", "stop", "revert", function(e,ui) {
	
		var o = ui.options;
		var rpos = { left: 0, top: 0 };
		o.beQuietAtEnd = true;

		if(ui.helper != this) {

			rpos = $(ui.draggable.sorthelper || this).offset({ border: false });

			var nl = rpos.left-o.po.left-o.margins.left;
			var nt = rpos.top-o.po.top-o.margins.top;

		} else {
			var nl = o.co.left - (o.po ? o.po.left : 0);
			var nt = o.co.top - (o.po ? o.po.top : 0);
		}
		
		var self = ui.draggable;

		$(ui.helper).animate({
			left: nl,
			top: nt
		}, 500, function() {
			
			if(o.wasPositioned) $(self.element).css('position', o.wasPositioned);
			if(o.stop) o.stop.apply(self.element, [self.helper, self.pos, [o.co.left - o.po.left,o.co.top - o.po.top],self]);
			
			if(self.helper != self.element) window.setTimeout(function() { $(self.helper).remove(); }, 0); //Using setTimeout because of strange flickering in Firefox
			
		});
		
	});

//----------------------------------------------------------------

	$.ui.plugin.add("draggable", "start", "iframeFix", function(e,ui) {

		var o = ui.options;
		if(!ui.draggable.slowMode) { // Make clones on top of iframes (only if we are not in slowMode)
			if(o.iframeFix.constructor == Array) {
				for(var i=0;i<o.iframeFix.length;i++) {
					var co = $(o.iframeFix[i]).offset({ border: false });
					$("<div class='DragDropIframeFix' style='background: #fff;'></div>").css("width", $(o.iframeFix[i])[0].offsetWidth+"px").css("height", $(o.iframeFix[i])[0].offsetHeight+"px").css("position", "absolute").css("opacity", "0.001").css("z-index", "1000").css("top", co.top+"px").css("left", co.left+"px").appendTo("body");
				}		
			} else {
				$("iframe").each(function() {					
					var co = $(this).offset({ border: false });
					$("<div class='DragDropIframeFix' style='background: #fff;'></div>").css("width", this.offsetWidth+"px").css("height", this.offsetHeight+"px").css("position", "absolute").css("opacity", "0.001").css("z-index", "1000").css("top", co.top+"px").css("left", co.left+"px").appendTo("body");
				});							
			}		
		}

	});
	
	$.ui.plugin.add("draggable","stop", "iframeFix", function(e,ui) {
		if(ui.options.iframeFix) $("div.DragDropIframeFix").each(function() { this.parentNode.removeChild(this); }); //Remove frame helpers	
	});
		
//----------------------------------------------------------------

	$.ui.plugin.add("draggable", "start", "containment", function(e,ui) {

		var o = ui.options;

		if(!o.cursorAtIgnore || o.containment.left != undefined || o.containment.constructor == Array) return;
		if(o.containment == 'parent') o.containment = this.parentNode;


		if(o.containment == 'document') {
			o.containment = [
				0-o.margins.left,
				0-o.margins.top,
				$(document).width()-o.margins.right,
				($(document).height() || document.body.parentNode.scrollHeight)-o.margins.bottom
			];
		} else { //I'm a node, so compute top/left/right/bottom
			var ce = $(o.containment)[0];
			var co = $(o.containment).offset({ border: false });

			o.containment = [
				co.left-o.margins.left,
				co.top-o.margins.top,
				co.left+(ce.offsetWidth || ce.scrollWidth)-o.margins.right,
				co.top+(ce.offsetHeight || ce.scrollHeight)-o.margins.bottom
			];
		}

	});
	
	$.ui.plugin.add("draggable", "drag", "containment", function(e,ui) {
		
		var o = ui.options;
		if(!o.cursorAtIgnore) return;
			
		var h = $(ui.helper);
		var c = o.containment;
		if(c.constructor == Array) {
			
			if((ui.draggable.pos[0] < c[0]-o.po.left)) ui.draggable.pos[0] = c[0]-o.po.left;
			if((ui.draggable.pos[1] < c[1]-o.po.top)) ui.draggable.pos[1] = c[1]-o.po.top;
			if(ui.draggable.pos[0]+h[0].offsetWidth > c[2]-o.po.left) ui.draggable.pos[0] = c[2]-o.po.left-h[0].offsetWidth;
			if(ui.draggable.pos[1]+h[0].offsetHeight > c[3]-o.po.top) ui.draggable.pos[1] = c[3]-o.po.top-h[0].offsetHeight;
			
		} else {

			if(c.left && (ui.draggable.pos[0] < c.left)) ui.draggable.pos[0] = c.left;
			if(c.top && (ui.draggable.pos[1] < c.top)) ui.draggable.pos[1] = c.top;

			var p = $(o.pp);
			if(c.right && ui.draggable.pos[0]+h[0].offsetWidth > p[0].offsetWidth-c.right) ui.draggable.pos[0] = (p[0].offsetWidth-c.right)-h[0].offsetWidth;
			if(c.bottom && ui.draggable.pos[1]+h[0].offsetHeight > p[0].offsetHeight-c.bottom) ui.draggable.pos[1] = (p[0].offsetHeight-c.bottom)-h[0].offsetHeight;
			
		}

		
	});

//----------------------------------------------------------------

	$.ui.plugin.add("draggable", "drag", "grid", function(e,ui) {
		var o = ui.options;
		if(!o.cursorAtIgnore) return;
		ui.draggable.pos[0] = o.co.left + o.margins.left - o.po.left + Math.round((ui.draggable.pos[0] - o.co.left - o.margins.left + o.po.left) / o.grid[0]) * o.grid[0];
		ui.draggable.pos[1] = o.co.top + o.margins.top - o.po.top + Math.round((ui.draggable.pos[1] - o.co.top - o.margins.top + o.po.top) / o.grid[1]) * o.grid[1];
	});

//----------------------------------------------------------------

	$.ui.plugin.add("draggable", "drag", "axis", function(e,ui) {
		var o = ui.options;
		if(!o.cursorAtIgnore) return;
		if(o.constraint) o.axis = o.constraint; //Legacy check
		o.axis ? ( o.axis == 'x' ? ui.draggable.pos[1] = o.co.top - o.margins.top - o.po.top : ui.draggable.pos[0] = o.co.left - o.margins.left - o.po.left ) : null;
	});

//----------------------------------------------------------------

	$.ui.plugin.add("draggable", "drag", "scroll", function(e,ui) {

		var o = ui.options;
		o.scrollSensitivity	= o.scrollSensitivity || 20;
		o.scrollSpeed		= o.scrollSpeed || 20;

		if(o.pp && o.ppOverflow) { // If we have a positioned parent, we only scroll in this one
			// TODO: Extremely strange issues are waiting here..handle with care
		} else {
			if((ui.draggable.rpos[1] - $(window).height()) - $(document).scrollTop() > -o.scrollSensitivity) window.scrollBy(0,o.scrollSpeed);
			if(ui.draggable.rpos[1] - $(document).scrollTop() < o.scrollSensitivity) window.scrollBy(0,-o.scrollSpeed);
			if((ui.draggable.rpos[0] - $(window).width()) - $(document).scrollLeft() > -o.scrollSensitivity) window.scrollBy(o.scrollSpeed,0);
			if(ui.draggable.rpos[0] - $(document).scrollLeft() < o.scrollSensitivity) window.scrollBy(-o.scrollSpeed,0);
		}

	});

//----------------------------------------------------------------

	$.ui.plugin.add("draggable", "drag", "wrapHelper", function(e,ui) {

		var o = ui.options;
		if(o.cursorAtIgnore) return;
		var t = ui.helper;

		if(!o.pp || !o.ppOverflow) {
			var wx = $(window).width() - ($.browser.mozilla ? 20 : 0);
			var sx = $(document).scrollLeft();
			
			var wy = $(window).height();
			var sy = $(document).scrollTop();	
		} else {
			var wx = o.pp.offsetWidth + o.po.left - 20;
			var sx = o.pp.scrollLeft;
			
			var wy = o.pp.offsetHeight + o.po.top - 20;
			var sy = o.pp.scrollTop;						
		}

		ui.draggable.pos[0] -= ((ui.draggable.rpos[0]-o.cursorAt.left - wx + t.offsetWidth+o.margins.right) - sx > 0 || (ui.draggable.rpos[0]-o.cursorAt.left+o.margins.left) - sx < 0) ? (t.offsetWidth+o.margins.left+o.margins.right - o.cursorAt.left * 2) : 0;
		
		ui.draggable.pos[1] -= ((ui.draggable.rpos[1]-o.cursorAt.top - wy + t.offsetHeight+o.margins.bottom) - sy > 0 || (ui.draggable.rpos[1]-o.cursorAt.top+o.margins.top) - sy < 0) ? (t.offsetHeight+o.margins.top+o.margins.bottom - o.cursorAt.top * 2) : 0;

	});

})(jQuery);