/*!
 * jQuery UI Mouse @VERSION
 * http://jqueryui.com
 *
 * Copyright 2014 jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 *
 * http://api.jqueryui.com/mouse/
 */
(function( factory ) {
    if ( typeof define === "function" && define.amd ) {

        // AMD. Register as an anonymous module.
        define([
            "jquery",
            "./widget"
        ], factory );
    } else {

        // Browser globals
        factory( jQuery );
    }
}(function( $ ) {

    var mouseHandled = false;
    $( document ).mouseup( function() {
        mouseHandled = false;
    });

    return $.widget("ui.mouse", {
        version: "@VERSION",
        options: {
            cancel: "input,textarea,button,select,option",
            distance: 1,
            delay: 0
        },
        _mouseInit: function() {
            var that = this;

            this.element
                .bind("mousedown." + this.widgetName, function(event) {
                    return that._mouseDown(event);
                })
                .bind("click." + this.widgetName, function(event) {
                    if (true === $.data(event.target, that.widgetName + ".preventClickEvent")) {
                        $.removeData(event.target, that.widgetName + ".preventClickEvent");
                        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);
            if ( this._mouseMoveDelegate ) {
                this.document
                    .unbind("mousemove." + this.widgetName, this._mouseMoveDelegate)
                    .unbind("mouseup." + this.widgetName, this._mouseUpDelegate);
            }
        },

        _mouseDown: function(event) {
            // don't let more than one widget handle mouseStart
            if ( mouseHandled ) {
                return;
            }

            // we may have missed mouseup (out of window)
            (this._mouseStarted && this._mouseUp(event));

            this._mouseDownEvent = event;

            var that = this,
                btnIsLeft = (event.which === 1),
            // event.target.nodeName works around a bug in IE 8 with
            // disabled inputs (#7620)
                elIsCancel = (typeof this.options.cancel === "string" && event.target.nodeName ? $(event.target).closest(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() {
                    that.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;
                }
            }

            // Click event may never have fired (Gecko & Opera)
            if (true === $.data(event.target, this.widgetName + ".preventClickEvent")) {
                $.removeData(event.target, this.widgetName + ".preventClickEvent");
            }

            // these delegates are required to keep context
            this._mouseMoveDelegate = function(event) {
                return that._mouseMove(event);
            };
            this._mouseUpDelegate = function(event) {
                return that._mouseUp(event);
            };

            this.document
                .bind( "mousemove." + this.widgetName, this._mouseMoveDelegate )
                .bind( "mouseup." + this.widgetName, this._mouseUpDelegate );

            event.preventDefault();

            mouseHandled = true;
            return true;
        },

        _mouseMove: function(event) {
            // IE mouseup check - mouseup happened when mouse was out of window
            if ($.ui.ie && ( !document.documentMode || document.documentMode < 9 ) && !event.button) {
                return this._mouseUp(event);

                // Iframe mouseup check - mouseup occurred in another document
            } else if ( !event.which ) {
                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) {
            this.document
                .unbind( "mousemove." + this.widgetName, this._mouseMoveDelegate )
                .unbind( "mouseup." + this.widgetName, this._mouseUpDelegate );

            if (this._mouseStarted) {
                this._mouseStarted = false;

                if (event.target === this._mouseDownEvent.target) {
                    $.data(event.target, this.widgetName + ".preventClickEvent", true);
                }

                this._mouseStop(event);
            }

            mouseHandled = false;
            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; }
    });

}));