/*
* 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($) {

    // 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: "15 0"
            }
        },
        _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.element.pushStack(this.tooltip.get());
        },

        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
            }).show().position($.extend({
                of: target
            }, this.options.position)).hide();

            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);