Ticket #44889: 44889.3.diff

src/wp-admin/theme-editor.php

@@ -344 +344 @@
                                 <h1><?php _e( 'Heads up!' ); ?></h1>
                                 <p>
                                         <?php
-                                        echo sprintf(
-                                                /* translators: %s: link to documentation on child themes */
-                                                __( 'You appear to be making direct edits to your theme in the WordPress dashboard. We recommend that you don&#8217;t! Editing your theme directly could break your site and your changes may be lost in future updates. If you need to tweak more than your theme&#8217;s CSS, you might want to try <a href="%s">making a child theme</a>.' ),
-                                                esc_url( __( 'https://developer.wordpress.org/themes/advanced-topics/child-themes/' ) )
-                                        );
+                                        _e( 'You appear to be making direct edits to your theme in the WordPress dashboard. We recommend that you don&#8217;t! Editing your theme directly could break your site and your changes may be lost in future updates.' );
+
+                                        if ( ! $theme->parent() ) {
+                                                echo sprintf(
+                                                        /* translators: %s: link to documentation on child themes */
+                                                        __( 'If you need to tweak more than your theme&#8217;s CSS, you might want to try <a href="%s">making a child theme</a>.' ),
+                                                        esc_url( __( 'https://developer.wordpress.org/themes/advanced-topics/child-themes/' ) )
+                                                );
+                                        }
                                         ?>
                                 </p>
                                 <p><?php _e( 'If you decide to go ahead with direct edits anyway, use a file manager to create a copy with a new name and hang on to the original. That way, you can re-enable a functional version if something goes wrong.' ); ?></p>