Tooltip: Fix re-enabling of delegated tooltips

Fixes #14950
Closes gh-1699

tests/unit/tooltip/methods.js

@@ -94,6 +94,20 @@ QUnit.test( "enable/disable", function( assert ) {
 	$.fx.off = false;
 } );
 
+QUnit.test( "enable/disable delegated", function( assert ) {
+	assert.expect( 1 );
+	var element = $( "#qunit-fixture" ).tooltip();
+	var tooltipped = $( "#tooltipped1" );
+
+	element.tooltip( "disable" );
+	element.tooltip( "enable" );
+
+	tooltipped.trigger( "mouseover" );
+	assert.equal( $( ".ui-tooltip" ).length, 1, "open" );
+
+	element.tooltip( "destroy" );
+} );
+
 QUnit.test( "widget", function( assert ) {
 	assert.expect( 2 );
 	var element = $( "#tooltipped1" ).tooltip(),

ui/widgets/tooltip.js

@@ -114,6 +114,8 @@ $.widget( "ui.tooltip", {
 			} )
 			.appendTo( this.document[ 0 ].body );
 		this._addClass( this.liveRegion, null, "ui-helper-hidden-accessible" );
+
+		this.disabledTitles = $( [] );
 	},
 
 	_setOption: function( key, value ) {
@@ -143,25 +145,29 @@ $.widget( "ui.tooltip", {
 		} );
 
 		// Remove title attributes to prevent native tooltips
-		this.element.find( this.options.items ).addBack().each( function() {
-			var element = $( this );
-			if ( element.is( "[title]" ) ) {
-				element
-					.data( "ui-tooltip-title", element.attr( "title" ) )
-					.removeAttr( "title" );
-			}
-		} );
+		this.disabledTitles = this.disabledTitles.add(
+			this.element.find( this.options.items ).addBack()
+				.filter( function() {
+					var element = $( this );
+					if ( element.is( "[title]" ) ) {
+						return element
+							.data( "ui-tooltip-title", element.attr( "title" ) )
+							.removeAttr( "title" );
+					}
+				} )
+		);
 	},
 
 	_enable: function() {
 
 		// restore title attributes
-		this.element.find( this.options.items ).addBack().each( function() {
+		this.disabledTitles.each( function() {
 			var element = $( this );
 			if ( element.data( "ui-tooltip-title" ) ) {
 				element.attr( "title", element.data( "ui-tooltip-title" ) );
 			}
 		} );
+		this.disabledTitles = $( [] );
 	},
 
 	open: function( event ) {