/*
 * jQuery UI Tooltip @VERSION
 *
 * Copyright 2010, AUTHORS.txt
 * Dual licensed under the MIT or GPL Version 2 licenses.
 * http://jquery.org/license
 *
 * http://docs.jquery.com/UI/Tooltip
 *
 * Depends:
 *  jquery.ui.core.js
 *  jquery.ui.widget.js
 *  jquery.ui.position.js
 */
(function($) {

var increments = 0;

$.widget("ui.tooltip", {
    options: {
        items: "[title]",
        content: function() {
            return $(this).attr("title");
        },
        position: {
            my: "left center",
            at: "right center",
            offset: "15 0"
        }
    },
    _create: function() {
        var self = this;
        this.tooltip = $("<div></div>")
            .attr("id", "ui-tooltip-" + increments++)
            .attr("role", "tooltip")
            .attr("aria-hidden", "true")
            .addClass("ui-tooltip ui-widget ui-corner-all ui-widget-content")
            .appendTo(document.body)
            .hide();
        this.tooltipContent = $("<div></div>")
            .addClass("ui-tooltip-content")
            .appendTo(this.tooltip);
        this.opacity = this.tooltip.css("opacity");
        this.element
            .bind("focus.tooltip mouseover.tooltip", function(event) {
                self.open( event );
            })
            .bind("blur.tooltip mouseout.tooltip", function(event) {
                self.close( event );
            });
    },
    
    enable: function() {
        this.options.disabled = false;
    },
    
    disable: function() {
        this.options.disabled = true;
    },
    
    destroy: function() {
        this.tooltip.remove();
        $.Widget.prototype.destroy.apply(this, arguments);
    },
    
    widget: function() {
        return this.element.pushStack(this.tooltip.get());
    },
    
    open: function(event) {
        var target = $(event && event.target || this.element).closest(this.options.items);
        // already visible? possible when both focus and mouseover events occur
        if (this.current && this.current[0] == target[0])
            return;
        var self = this;
        this.current = target;
        this.currentTitle = target.attr("title");
        var content = this.options.content.call(target[0], function(response) {
            // IE may instantly serve a cached response, need to give it a chance to finish with _show before that
            setTimeout(function() {
                // ignore async responses that come in after the tooltip is already hidden
                if (self.current == target)
                    self._show(event, target, response);
            }, 13);
        });
        if (content) {
            self._show(event, target, content);
        }
    },
    
    _show: function(event, target, content) {
        if (!content)
            return;
        
        //target.attr("title", "");
        
        if (this.options.disabled)
            return;
            
        this.tooltipContent.html(content);
        this.tooltip.css({
            top: 0,
            left: 0
        }).show().position( $.extend({
            of: target
        }, this.options.position )).hide();
        
        this.tooltip.attr("aria-hidden", "false");
        target.attr("aria-describedby", this.tooltip.attr("id"));

        this.tooltip.stop(false, true).fadeIn();

        this._trigger( "open", event );
    },
    
    close: function(event) {
        if (!this.current)
            return;
        
        var current = this.current.attr("title", this.currentTitle);
        this.current = null;
        
        if (this.options.disabled)
            return;
        
        current.removeAttr("aria-describedby");
        this.tooltip.attr("aria-hidden", "true");
        
        this.tooltip.stop(false, true).fadeOut();
        
        this._trigger( "close", event );
    }
    
});

})(jQuery);