Fix #14180. Allow cross-frame use of focusin/out. Close gh-1369.

(cherry picked from commit 6d5dfa0eda2c19e8838930fafff83b596654eca2)
Manually edited for conflicts.

1 files changed, 14 insertions, 7 deletions

diff --git a/src/event.js b/src/event.js
index a6f69f49f..cc0fe1700 100644
--- a/src/event.js
+++ b/src/event.js
@@ -892,22 +892,29 @@ if ( !support.changeBubbles ) {
 if ( !support.focusinBubbles ) {
 	jQuery.each({ focus: "focusin", blur: "focusout" }, function( orig, fix ) {
 
-		// Attach a single capturing handler while someone wants focusin/focusout
-		var attaches = 0,
-			handler = function( event ) {
+		// Attach a single capturing handler on the document while someone wants focusin/focusout
+		var handler = function( event ) {
 				jQuery.event.simulate( fix, event.target, jQuery.event.fix( event ), true );
 			};
 
 		jQuery.event.special[ fix ] = {
 			setup: function() {
-				if ( attaches++ === 0 ) {
-					document.addEventListener( orig, handler, true );
+				var doc = this.ownerDocument,
+					attaches = jQuery._data( doc, "focusCount" );
+
+				if ( !attaches ) {
+					doc.addEventListener( orig, handler, true );
 				}
+				jQuery._data( doc, "focusCount", ( attaches || 0 ) + 1 );
 			},
 			teardown: function() {
-				if ( --attaches === 0 ) {
-					document.removeEventListener( orig, handler, true );
+				var doc = this.ownerDocument,
+					attaches = jQuery._data( doc, "focusCount" ) - 1;
+
+				if ( !attaches ) {
+					doc.removeEventListener( orig, handler, true );
 				}
+				jQuery._data( doc, "focusCount", attaches );
 			}
 		};
 	});