Ticket #40974: 40974.1.diff

src/wp-admin/js/widgets/text-widgets.js

@@ -184 +184 @@
                                                         }, updateWidgetBuffer );
                                                 }
 
-                                                editor.save();
+                                                editor.save({ no_events: true }); // Arg no_events to prevent infinite SaveContent loop.
                                                 textarea.trigger( 'change' );
                                         }
                                 };
-                                editor.on( 'focus', function() {
+                                editor.on( 'focus', function onEditorFocus() {
                                         control.editorFocused = true;
                                 });
+                                editor.on( 'blur', function onEditorBlur() {
+                                        triggerChangeIfDirty();
+                                });
+                                editor.on( 'paste', function onEditorPaste() {
+                                        editor.isNotDirty = false; // Due to an apparent defect in TinyMCE where pasting doesn't cause dirty flag to be set.
+                                        triggerChangeIfDirty();
+                                });
                                 editor.on( 'NodeChange', _.debounce( triggerChangeIfDirty, changeDebounceDelay ) );
-                                editor.on( 'blur', function() {
+
+                                /*
+                                 * Note that originally the 'blur' event was used below. It had to be
+                                 * replaced with 'SaveContent' because the 'blur' event does not trigger
+                                 * when the user switches to the Text tab.
+                                 */
+                                editor.on( 'SaveContent', function() {
                                         control.editorFocused = false;
                                         triggerChangeIfDirty();
                                 });