Disable cut and copy if there is not selected text

Author: ar-vargas

app/src/processing/app/Editor.java

@@ -1515,6 +1515,21 @@ public void actionPerformed(ActionEvent e) {
       menu.add(useSelectionForFindItem);
     }
 
+    menu.addMenuListener(new MenuListener() {
+      @Override
+      public void menuSelected(MenuEvent e) {
+        boolean enabled = textarea.getSelectedText() != null;
+        cutItem.setEnabled(enabled);
+        copyItem.setEnabled(enabled);
+      }
+
+      @Override
+      public void menuDeselected(MenuEvent e) {}
+
+      @Override
+      public void menuCanceled(MenuEvent e) {}
+    });
+
     return menu;
   }