Changeset 42374 for trunk/src/wp-includes/widgets.php

Timestamp:

12/07/2017 02:19:11 AM (7 years ago)

Author:

obenland

Message:

Widgets: Always try restoring widget assignments

For code-historic reasons, restoring widget assignments would not be attempted if there were no sidebars to map.
Restoring previous assignments is something unrelated to sidebar mappings however, so now it will be attempted on every theme switch.

See #42719.

File:

• trunk/src/wp-includes/widgets.php (modified) (3 diffs)

trunk/src/wp-includes/widgets.php

@@ -1220 +1220 @@
  *
  * @since 4.9.0
+ * @since 4.9.2 Always tries to restore widget assignments from previous data, not just if sidebars needed mapping.
  *
  * @param array $existing_sidebars_widgets List of sidebars and their widget instance IDs.
@@ -1262 +1263 @@
     }
 
-    // If there are no old sidebars left, then we're done.
-    if ( empty( $existing_sidebars_widgets ) ) {
-        return $new_sidebars_widgets;
-    }
-
-    /*
-     * If old and new theme both have sidebars that contain phrases
-     * from within the same group, make an educated guess and map it.
-     */
-    $common_slug_groups = array(
-        array( 'sidebar', 'primary', 'main', 'right' ),
-        array( 'second', 'left' ),
-        array( 'sidebar-2', 'footer', 'bottom' ),
-        array( 'header', 'top' ),
-    );
-
-    // Go through each group...
-    foreach ( $common_slug_groups as $slug_group ) {
-
-        // ...and see if any of these slugs...
-        foreach ( $slug_group as $slug ) {
-
-            // ...and any of the new sidebars...
-            foreach ( $wp_registered_sidebars as $new_sidebar => $args ) {
-
-                // ...actually match!
-                if ( false === stripos( $new_sidebar, $slug ) && false === stripos( $slug, $new_sidebar ) ) {
-                    continue;
-                }
-
-                // Then see if any of the existing sidebars...
-                foreach ( $existing_sidebars_widgets as $sidebar => $widgets ) {
-
-                    // ...and any slug in the same group...
-                    foreach ( $slug_group as $slug ) {
-
-                        // ... have a match as well.
-                        if ( false === stripos( $sidebar, $slug ) && false === stripos( $slug, $sidebar ) ) {
-                            continue;
-                        }
-
-                        // Make sure this sidebar wasn't mapped and removed previously.
-                        if ( ! empty( $existing_sidebars_widgets[ $sidebar ] ) ) {
-
-                            // We have a match that can be mapped!
-                            $new_sidebars_widgets[ $new_sidebar ] = array_merge( $new_sidebars_widgets[ $new_sidebar ], $existing_sidebars_widgets[ $sidebar ] );
-
-                            // Remove the mapped sidebar so it can't be mapped again.
-                            unset( $existing_sidebars_widgets[ $sidebar ] );
-
-                            // Go back and check the next new sidebar.
-                            continue 3;
-                        }
-                    } // endforeach ( $slug_group as $slug )
-                } // endforeach ( $existing_sidebars_widgets as $sidebar => $widgets )
-            } // endforeach foreach ( $wp_registered_sidebars as $new_sidebar => $args )
-        } // endforeach ( $slug_group as $slug )
-    } // endforeach ( $common_slug_groups as $slug_group )
+    // If there are more sidebars, try to map them.
+    if ( ! empty( $existing_sidebars_widgets ) ) {
+
+        /*
+         * If old and new theme both have sidebars that contain phrases
+         * from within the same group, make an educated guess and map it.
+         */
+        $common_slug_groups = array(
+            array( 'sidebar', 'primary', 'main', 'right' ),
+            array( 'second', 'left' ),
+            array( 'sidebar-2', 'footer', 'bottom' ),
+            array( 'header', 'top' ),
+        );
+
+        // Go through each group...
+        foreach ( $common_slug_groups as $slug_group ) {
+
+            // ...and see if any of these slugs...
+            foreach ( $slug_group as $slug ) {
+
+                // ...and any of the new sidebars...
+                foreach ( $wp_registered_sidebars as $new_sidebar => $args ) {
+
+                    // ...actually match!
+                    if ( false === stripos( $new_sidebar, $slug ) && false === stripos( $slug, $new_sidebar ) ) {
+                        continue;
+                    }
+
+                    // Then see if any of the existing sidebars...
+                    foreach ( $existing_sidebars_widgets as $sidebar => $widgets ) {
+
+                        // ...and any slug in the same group...
+                        foreach ( $slug_group as $slug ) {
+
+                            // ... have a match as well.
+                            if ( false === stripos( $sidebar, $slug ) && false === stripos( $slug, $sidebar ) ) {
+                                continue;
+                            }
+
+                            // Make sure this sidebar wasn't mapped and removed previously.
+                            if ( ! empty( $existing_sidebars_widgets[ $sidebar ] ) ) {
+
+                                // We have a match that can be mapped!
+                                $new_sidebars_widgets[ $new_sidebar ] = array_merge( $new_sidebars_widgets[ $new_sidebar ], $existing_sidebars_widgets[ $sidebar ] );
+
+                                // Remove the mapped sidebar so it can't be mapped again.
+                                unset( $existing_sidebars_widgets[ $sidebar ] );
+
+                                // Go back and check the next new sidebar.
+                                continue 3;
+                            }
+                        } // endforeach ( $slug_group as $slug )
+                    } // endforeach ( $existing_sidebars_widgets as $sidebar => $widgets )
+                } // endforeach foreach ( $wp_registered_sidebars as $new_sidebar => $args )
+            } // endforeach ( $slug_group as $slug )
+        } // endforeach ( $common_slug_groups as $slug_group )
+    }
 
     // Move any left over widgets to inactive sidebar.
@@ -1330 +1330 @@
     // Sidebars_widgets settings from when this theme was previously active.
     $old_sidebars_widgets = get_theme_mod( 'sidebars_widgets' );
-    $old_sidebars_widgets = $old_sidebars_widgets['data'];
+    $old_sidebars_widgets = isset( $old_sidebars_widgets['data'] ) ? $old_sidebars_widgets['data'] : false;
 
     if ( is_array( $old_sidebars_widgets ) ) {