Ticket #22080: add-theme-support-without-stomp.diff

wp-includes/theme.php

@@ -1350 +1350 @@
                                 define( 'BACKGROUND_IMAGE', $args[0]['default-image'] );
 
                         break;
+                case 'post-thumbnails':
+                        // A boolean 3rd param may be added to set if the value passed
+                        // should stomp the previous setting or be treated as additive (merge).
+                        // It defaults to merging the new values with old.
+                        $current = get_theme_support( 'post-thumbnails' );
+                        if ( $args === true ) {
+                                $stomp = true;
+                        }
+                        else {
+                                $_args = func_get_args();
+                                if ( count( $_args ) == 3 ) {
+                                        $stomp = (bool) $_args[2];
+                                }
+                                else {
+                                        $stomp = false;
+                                }
+                        }
+                        if ( !$stomp ) {
+                                // currently enabled for some post types, merge
+                                if ( is_array( $current ) && is_array( $current[0] ) ) {
+                                        if ( is_string( $args[0] ) ) {
+                                                $args[0] = array( $args[0] );
+                                        }
+                                        $args[0] = array_unique( array_merge( $current[0], $args[0] ) );
+                                }
+                                // currently enabled for all post types, keep as is
+                                else if ( $current ) {
+                                        $args = true;
+                                }
+                                // else disabled for all post types, allow stomp below
+                        }
+                        break;
         }
 
         $_wp_theme_features[ $feature ] = $args;