/*
 * jQuery UI Tooltip 1.9m1
 *
 * Copyright (c) 2009 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/Tooltip
 *
 * Depends:
 *  jquery.ui.core.js
 *  jquery.ui.widget.js
 *  jquery.ui.position.js
 */
(function($) {

// role=application on body required for screenreaders to correctly interpret aria attributes
if( !$(document.body).is('[role]') ){
    $(document.body).attr('role','application');
} 

var increments = 0;

$.widget("ui.tooltip", {       
    options: {
        tooltipClass: "ui-widget-content",
        content: function() {
            return $(this).attr("title");
        },
        position: {
            my: "left center",
            at: "right center",
            offset: "-80 350"
        }
    },
    _init: 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")
            .addClass(this.options.tooltipClass)
            .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 mouseenter.tooltip", function(event) {
                self.open( event );
            })
            .bind("blur.tooltip mouseleave.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.tooltip;
    },
    
    open: function(event) {
        var target = this.element;
        // 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) {
            // ignore async responses that come in after the tooltip is already hidden
            if (self.current == target)
                self._show(event, target, response);
        });
        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
        }).position($.extend(this.options.position, {
            of: target
        }));
        
        this.tooltip.attr("aria-hidden", "false");
        target.attr("aria-describedby", this.tooltip.attr("id"));

        if (this.tooltip.is(":animated"))
            this.tooltip.stop().show().fadeTo("normal", this.opacity);
        else
            this.tooltip.is(':visible') ? this.tooltip.fadeTo("normal", this.opacity) : this.tooltip.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");
        
        if (this.tooltip.is(':animated'))
                this.tooltip.stop().fadeTo("normal", 0, function() {
                    $(this).hide().css("opacity", "");
                });
            else
                this.tooltip.stop().fadeOut();
        
        this._trigger( "close", event );
    }
    
});

})(jQuery);