Tooltip: Treat the tooltip as closing until it's fully removed

This ensures that we don't trigger the close event twice if the tooltip is
destroyed during the hide animation.

Closes gh-1306

Author: scottgonzalez

tests/unit/tooltip/tooltip_core.js

@@ -154,4 +154,24 @@ asyncTest( "programmatic focus with async content", function() {
 	element.focus();
 });
 
+asyncTest( "destroy during hide animation; only one close event", function() {
+	expect( 1 );
+
+	var element = $( "#tooltipped1" ).tooltip({
+		show: false,
+		hide: true
+	});
+
+	element.bind( "tooltipclose", function() {
+		ok( true, "tooltip closed" );
+	});
+
+	element.tooltip( "open" );
+	element.tooltip( "close" );
+	setTimeout(function() {
+		element.tooltip( "destroy" );
+		start();
+	});
+});
+
 }( jQuery ) );

ui/tooltip.js

@@ -296,6 +296,8 @@ return $.widget( "ui.tooltip", {
 			}, this.options.position ) );
 		}
 
+		this.hiding = false;
+		this.closing = false;
 		tooltip.hide();
 
 		this._show( tooltip, this.options.show );
@@ -362,9 +364,12 @@ return $.widget( "ui.tooltip", {
 
 		this._removeDescribedBy( target );
 
+		this.hiding = true;
 		tooltip.stop( true );
 		this._hide( tooltip, this.options.hide, function() {
 			that._removeTooltip( $( this ) );
+			this.hiding = false;
+			this.closing = false;
 		});
 
 		target.removeData( "ui-tooltip-open" );
@@ -385,7 +390,9 @@ return $.widget( "ui.tooltip", {
 
 		this.closing = true;
 		this._trigger( "close", event, { tooltip: tooltip } );
-		this.closing = false;
+		if ( !this.hiding ) {
+			this.closing = false;
+		}
 	},
 
 	_tooltip: function( element ) {