/*!
 * jQuery UI Mouse 1.8.2
 *
 * 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('touchstart.' + this.widgetName, function (event) { //TOUCH
                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) || event.originalEvent.touches,
			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);
            };
            this._touchMoveDelegate = function (event) { //TOUCH
                //if (e.preventDefault) { //don't pan the whole window
                //    e.preventDefault();
                //}
                return self._mouseMove(event);
            };
			
			if(event.originalEvent.touches){				
				$(document)
				.bind('touchmove.' + this.widgetName, this._touchMoveDelegate) //TOUCH
				.bind('touchend.' + this.widgetName, this._mouseUpDelegate);//TOUCH
			}
			else{
				$(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) {
			
			if(event.originalEvent.touches){				
				$(document)
				.unbind('touchmove.' + this.widgetName, this._touchMoveDelegate) //TOUCH
				.unbind('touchend.' + this.widgetName, this._mouseUpDelegate); //TOUCH
			}
			else{				
				$(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);