1 files changed, 32 insertions, 23 deletions

diff --git a/ui/jquery.ui.dialog.js b/ui/jquery.ui.dialog.js
index b94757505..4279d357c 100644
--- a/ui/jquery.ui.dialog.js
+++ b/ui/jquery.ui.dialog.js
@@ -724,22 +724,27 @@ $.widget( "ui.dialog", {
 			return;
 		}
 
-		var that = this,
-			widgetFullName = this.widgetFullName;
-		if ( !$.ui.dialog.overlayInstances ) {
-			// Prevent use of anchors and inputs.
-			// We use a delay in case the overlay is created from an
-			// event that we're going to be cancelling. (#2804)
-			this._delay(function() {
-				// Handle .dialog().dialog("close") (#4065)
-				if ( $.ui.dialog.overlayInstances ) {
-					this.document.bind( "focusin.dialog", function( event ) {
-						if ( !that._allowInteraction( event ) ) {
-							event.preventDefault();
-							$(".ui-dialog:visible:last .ui-dialog-content")
-								.data( widgetFullName )._focusTabbable();
-						}
-					});
+		// We use a delay in case the overlay is created from an
+		// event that we're going to be cancelling (#2804)
+		var isOpening = true;
+		this._delay(function() {
+			isOpening = false;
+		});
+
+		if ( !this.document.data( "ui-dialog-overlays" ) ) {
+
+			// Prevent use of anchors and inputs
+			this._on( this.document, {
+				focusin: function( event ) {
+					if ( isOpening ) {
+						return;
+					}
+
+					if ( !this._allowInteraction( event ) ) {
+						event.preventDefault();
+						this.document.find( ".ui-dialog:visible:last .ui-dialog-content" )
+							.data( this.widgetFullName )._focusTabbable();
+					}
 				}
 			});
 		}
@@ -750,7 +755,8 @@ $.widget( "ui.dialog", {
 		this._on( this.overlay, {
 			mousedown: "_keepFocus"
 		});
-		$.ui.dialog.overlayInstances++;
+		this.document.data( "ui-dialog-overlays",
+			(this.document.data( "ui-dialog-overlays" ) || 0) + 1 );
 	},
 
 	_destroyOverlay: function() {
@@ -759,17 +765,20 @@ $.widget( "ui.dialog", {
 		}
 
 		if ( this.overlay ) {
-			$.ui.dialog.overlayInstances--;
-
-			if ( !$.ui.dialog.overlayInstances ) {
-				this.document.unbind( "focusin.dialog" );
+			var overlays = this.document.data( "ui-dialog-overlays" ) - 1;
+
+			if ( !overlays ) {
+				this.document
+					.off( "focusin" )
+					.removeData( "ui-dialog-overlays" );
+			} else {
+				this.document.data( "ui-dialog-overlays", overlays );
 			}
+
 			this.overlay.remove();
 			this.overlay = null;
 		}
 	}
 });
 
-$.ui.dialog.overlayInstances = 0;
-
 }( jQuery ) );