/*!

 * jQuery UI Mouse 1.8.1

 *

 * Copyright (c) 2010 AUTHORS.txt (http://jqueryui.com/about)

 * Dual licensed under the MIT (MIT-LICENSE.txt)

 * and GPL (GPL-LICENSE.txt) licenses.

 *

 * http://docs.jquery.com/UI/Mouse

 *

 * Depends:

 *	jquery.ui.widget.js

 */

(function($) {

$.widget("ui.mouse", {

	options: {

		cancel: ':input,option',

		distance: 1,

		delay: 0

	},

	_mouseInit: function() {

		var self = this;

		this.element

			.bind('mousedown.'+this.widgetName, function(event) {

				return self._mouseDown(event);

			})

			.bind('click.'+this.widgetName, function(event) {

				if(self._preventClickEvent) {

					self._preventClickEvent = false;

					event.stopImmediatePropagation();

					return false;

				}

			});

		this.started = false;

	},

	// TODO: make sure destroying one instance of mouse doesn't mess with

	// other instances of mouse

	_mouseDestroy: function() {

		this.element.unbind('.'+this.widgetName);

	},

	_mouseDown: function(event) {

		// don't let more than one widget handle mouseStart

		// TODO: figure out why we have to use originalEvent

		event.originalEvent = event.originalEvent || {};

		if (event.originalEvent.mouseHandled) { return; }

		// we may have missed mouseup (out of window)

		(this._mouseStarted && this._mouseUp(event));

		this._mouseDownEvent = event;

		var self = this,

			btnIsLeft = (event.which == 1),

			elIsCancel = (typeof this.options.cancel == "string" ? $(event.target).parents().add(event.target).filter(this.options.cancel).length : false);

		if (!btnIsLeft || elIsCancel || !this._mouseCapture(event)) {

			return true;

		}

		this.mouseDelayMet = !this.options.delay;

		if (!this.mouseDelayMet) {

			this._mouseDelayTimer = setTimeout(function() {

				self.mouseDelayMet = true;

			}, this.options.delay);

		}

		if (this._mouseDistanceMet(event) && this._mouseDelayMet(event)) {

			this._mouseStarted = (this._mouseStart(event) !== false);

			if (!this._mouseStarted) {

				event.preventDefault();

				return true;

			}

		}

		// these delegates are required to keep context

		this._mouseMoveDelegate = function(event) {

			return self._mouseMove(event);

		};

		this._mouseUpDelegate = function(event) {

			return self._mouseUp(event);

		};

		$(document)

			.bind('mousemove.'+this.widgetName, this._mouseMoveDelegate)

			.bind('mouseup.'+this.widgetName, this._mouseUpDelegate);

		// preventDefault() is used to prevent the selection of text here -

		// however, in Safari, this causes select boxes not to be selectable

		// anymore, so this fix is needed

		($.browser.safari || event.preventDefault());

		event.originalEvent.mouseHandled = true;

		return true;

	},

	_mouseMove: function(event) {

		// IE mouseup check - mouseup happened when mouse was out of window

		if ($.browser.msie && !event.button) {

			return this._mouseUp(event);

		}

		if (this._mouseStarted) {

			this._mouseDrag(event);

			return event.preventDefault();

		}

		if (this._mouseDistanceMet(event) && this._mouseDelayMet(event)) {

			this._mouseStarted =

				(this._mouseStart(this._mouseDownEvent, event) !== false);

			(this._mouseStarted ? this._mouseDrag(event) : this._mouseUp(event));

		}

		return !this._mouseStarted;

	},

	_mouseUp: function(event) {

		$(document)

			.unbind('mousemove.'+this.widgetName, this._mouseMoveDelegate)

			.unbind('mouseup.'+this.widgetName, this._mouseUpDelegate);

		if (this._mouseStarted) {

			this._mouseStarted = false;

			this._preventClickEvent = (event.target == this._mouseDownEvent.target);

			this._mouseStop(event);

		}

		return false;

	},

	_mouseDistanceMet: function(event) {

		return (Math.max(

				Math.abs(this._mouseDownEvent.pageX - event.pageX),

				Math.abs(this._mouseDownEvent.pageY - event.pageY)

			) >= this.options.distance

		);

	},

	_mouseDelayMet: function(event) {

		return this.mouseDelayMet;

	},

	// These are placeholder methods, to be overriden by extending plugin

	_mouseStart: function(event) {},

	_mouseDrag: function(event) {},

	_mouseStop: function(event) {},

	_mouseCapture: function(event) { return true; }

});

})(jQuery);