/*
 * jQuery UI @VERSION
 *
 * Copyright (c) 2008 Paul Bakaus (ui.jquery.com)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * http://docs.jquery.com/UI
 *
 * $Date: 2008-04-01 08:23:47 -0500 (Tue, 01 Apr 2008) $
 * $Rev: 5174 $
 */
;(function($) {
    //If the UI scope is not available, add it
    $.ui = $.ui || {};
    
    //Add methods that are vital for all mouse interaction stuff (plugin registering)
    $.extend($.ui, {
        plugin: {
            add: function(module, option, set) {
                var proto = $.ui[module].prototype;
                for(var i in set) {
                    proto.plugins[i] = proto.plugins[i] || [];
                    proto.plugins[i].push([option, set[i]]);
                }
            },
            call: function(instance, name, arguments) {
                var set = instance.plugins[name]; if(!set) return;
                for (var i = 0; i < set.length; i++) {
                    if (instance.options[set[i][0]]) set[i][1].apply(instance.element, arguments);
                }
            }    
        },
        cssCache: {},
        css: function(name) {
            if ($.ui.cssCache[name]) return $.ui.cssCache[name];
            var tmp = $('<div class="ui-resizable-gen">').addClass(name).css({position:'absolute', top:'-5000px', left:'-5000px', display:'block'}).appendTo('body');
            
            //if (!$.browser.safari)
                //tmp.appendTo('body'); 
            
            //Opera and Safari set width and height to 0px instead of auto
            //Safari returns rgba(0,0,0,0) when bgcolor is not set
            $.ui.cssCache[name] = !!(
                (!/auto|default/.test(tmp.css('cursor')) || (/^[1-9]/).test(tmp.css('height')) || (/^[1-9]/).test(tmp.css('width')) || 
                !(/none/).test(tmp.css('backgroundImage')) || !(/transparent|rgba\(0, 0, 0, 0\)/).test(tmp.css('backgroundColor')))
            );
            try { $('body').get(0).removeChild(tmp.get(0));    } catch(e){}
            return $.ui.cssCache[name];
        },
        disableSelection: function(e) {
            e.unselectable = "on";
            e.onselectstart = function() {    return false; };
            if (e.style) e.style.MozUserSelect = "none";
        },
        enableSelection: function(e) {
            e.unselectable = "off";
            e.onselectstart = function() { return true; };
            if (e.style) e.style.MozUserSelect = "";
        },
        hasScroll: function(e, a) {
              var scroll = /top/.test(a||"top") ? 'scrollTop' : 'scrollLeft', has = false;
              if (e[scroll] > 0) return true; e[scroll] = 1;
              has = e[scroll] > 0 ? true : false; e[scroll] = 0;
              return has; 
        }
    });
    /******* fn scope modifications ********/
    $.each( ['Left', 'Top'], function(i, name) {
        if(!$.fn['scroll'+name]) $.fn['scroll'+name] = function(v) {
            return v != undefined ?
                this.each(function() { this == window || this == document ? window.scrollTo(name == 'Left' ? v : $(window)['scrollLeft'](), name == 'Top'  ? v : $(window)['scrollTop']()) : this['scroll'+name] = v; }) :
                this[0] == window || this[0] == document ? self[(name == 'Left' ? 'pageXOffset' : 'pageYOffset')] || $.boxModel && document.documentElement['scroll'+name] || document.body['scroll'+name] : this[0][ 'scroll' + name ];
        };
    });
    var _remove = $.fn.remove;
    $.fn.extend({
        position: function() {
            var offset       = this.offset();
            var offsetParent = this.offsetParent();
            var parentOffset = offsetParent.offset();
            return {
                top:  offset.top - num(this[0], 'marginTop')  - parentOffset.top - num(offsetParent, 'borderTopWidth'),
                left: offset.left - num(this[0], 'marginLeft')  - parentOffset.left - num(offsetParent, 'borderLeftWidth')
            };
        },
        offsetParent: function() {
            var offsetParent = this[0].offsetParent;
            while ( offsetParent && (!/^body|html$/i.test(offsetParent.tagName) && $.css(offsetParent, 'position') == 'static') )
                offsetParent = offsetParent.offsetParent;
            return $(offsetParent);
        },
        mouseInteraction: function(o) {
            return this.each(function() {
                new $.ui.mouseInteraction(this, o);
            });
        },
        removeMouseInteraction: function(o) {
            return this.each(function() {
                if($.data(this, "ui-mouse"))
                    $.data(this, "ui-mouse").destroy();
            });
        },
        remove: function() {
            jQuery("*", this).add(this).trigger("remove");
            return _remove.apply(this, arguments );
        }
    });
    
    function num(el, prop) {
        return parseInt($.curCSS(el.jquery?el[0]:el,prop,true))||0;
    };
    
    
    /********** Mouse Interaction Plugin *********/
    
    $.ui.mouseInteraction = function(element, options) {
    
        var self = this;
        this.element = element;
        $.data(this.element, "ui-mouse", this);
        this.options = $.extend({}, options);
        
        $(element).bind('mousedown.draggable', function() { return self.click.apply(self, arguments); });
        if($.browser.msie) $(element).attr('unselectable', 'on'); //Prevent text selection in IE
        
        // prevent draggable-options-delay bug #2553
        $(element).mouseup(function() {
            if(self.timer) clearInterval(self.timer);
        });
    };
    
    $.extend($.ui.mouseInteraction.prototype, {
        
        destroy: function() { $(this.element).unbind('mousedown.draggable'); },
        trigger: function() { return this.click.apply(this, arguments); },
        click: function(e) {
            
            if(
                   e.which != 1 //only left click starts dragging
                || $.inArray(e.target.nodeName.toLowerCase(), this.options.dragPrevention || []) != -1 // Prevent execution on defined elements
                || (this.options.condition && !this.options.condition.apply(this.options.executor || this, [e, this.element])) //Prevent execution on condition
            ) return true;
                
            var self = this;
            var initialize = function() {
                self._MP = { left: e.pageX, top: e.pageY }; // Store the click mouse position
                $(document).bind('mouseup.draggable', function() { return self.stop.apply(self, arguments); });
                $(document).bind('mousemove.draggable', function() { return self.drag.apply(self, arguments); });
                
                if(!self.initalized && Math.abs(self._MP.left-e.pageX) >= self.options.distance || Math.abs(self._MP.top-e.pageY) >= self.options.distance) {                
                    if(self.options.start) self.options.start.call(self.options.executor || self, e, self.element);
                    if(self.options.drag) self.options.drag.call(self.options.executor || self, e, this.element); //This is actually not correct, but expected
                    self.initialized = true;
                }
            };
            if(this.options.delay) {
                if(this.timer) clearInterval(this.timer);
                this.timer = setTimeout(initialize, this.options.delay);
            } else {
                initialize();
            }
                
            return false;
            
        },
        stop: function(e) {            
            
            var o = this.options;
            if(!this.initialized) return $(document).unbind('mouseup.draggable').unbind('mousemove.draggable');
            if(this.options.stop) this.options.stop.call(this.options.executor || this, e, this.element);
            $(document).unbind('mouseup.draggable').unbind('mousemove.draggable');
            this.initialized = false;
            return false;
            
        },
        drag: function(e) {
            var o = this.options;
            if ($.browser.msie && !e.button) return this.stop.apply(this, [e]); // IE mouseup check
            
            if(!this.initialized && (Math.abs(this._MP.left-e.pageX) >= o.distance || Math.abs(this._MP.top-e.pageY) >= o.distance)) {                
                if(this.options.start) this.options.start.call(this.options.executor || this, e, this.element);
                this.initialized = true;
            } else {
                if(!this.initialized) return false;
            }
            if(o.drag) o.drag.call(this.options.executor || this, e, this.element);
            return false;
            
        }
    });
    
})(jQuery);