Use allow-list for mobile editor settings endpoint

lib/experimental/block-editor-settings-mobile.php

@@ -5,6 +5,38 @@
  * @package gutenberg
  */
 
+/**
+ * Keeps only supported settings for the mobile block editor.
+ *
+ * This is used to control the editor settings payload. Keys can be specified
+ * as `true` to be allowed, which will also allow entire nested structures.
+ * Alternatively, nested structures can have nested allow-lists for their keys.
+ *
+ * @param array $initial_array Existing block editor settings.
+ *
+ * @param array $allow_list_array Structured allow-list.
+ *
+ * @return array New block editor settings.
+ */
+function keep_supported_block_editor_settings_mobile($initial_array, $allow_list_array) {
+    $result = array();
+
+    foreach ($allow_list_array as $key => $value) {
+        $initial_value = $initial_array[$key];
+
+        if (array_key_exists($key, $initial_array)) {
+            if (is_array($value) && is_array($initial_value)) {
+							$result[$key] = keep_supported_block_editor_settings_mobile($initial_value, $value);
+            } else {
+							$result[$key] = $initial_value;
+            }
+        }
+    }
+
+    return $result;
+}
+
+
 /**
  * Adds settings to the mobile block editor.
  *
@@ -33,7 +65,61 @@ function gutenberg_get_block_editor_settings_mobile( $settings ) {
 		$settings['__experimentalEnableListBlockV2'] = true;
 	}
 
-	return $settings;
+	return keep_supported_block_editor_settings_mobile($settings, array(
+		"alignWide" => true,
+		"allowedBlockTypes" => true,
+		"allowedMimeTypes" => true,
+		"defaultEditorStyles" => true,
+		"blockCategories" => true,
+		"isRTL" => true,
+		"imageDefaultSize" => true,
+		"imageDimensions" => true,
+		"imageEditing" => true,
+		"imageSizes" => true,
+		"maxUploadFileSize" => true,
+		"__unstableGalleryWithImageBlocks" => true,
+		"disableCustomColors" => true,
+		"disableCustomFontSizes" => true,
+		"disableCustomGradients" => true,
+		"disableLayoutStyles" => true,
+		"enableCustomLineHeight" => true,
+		"enableCustomSpacing" => true,
+		"enableCustomUnits" => true,
+		"colors" => true,
+		"fontSizes" => true,
+		"__experimentalFeatures" => array(
+			"appearanceTools" => true,
+			"useRootPaddingAwareAlignments" => true,
+			"border" => true,
+			"color" => true,
+			"shadow" => true,
+			"spacing" => true,
+			"typography" => array(
+				"dropCap" => true,
+				"fontSizes" => true,
+				"fontStyle" => true,
+				"fontWeight" => true,
+				"letterSpacing" => true,
+				"textColumns" => true,
+				"textDecoration" => true,
+				"textTransform" => true,
+				"writingMode" => true,
+			),
+			"blocks" => true,
+			"background" => true,
+			"dimensions" => true,
+			"position" => true,
+		),
+		"gradients" => true,
+		"disableCustomSpacingSizes" => true,
+		"spacingSizes" => true,
+		"__unstableIsBlockBasedTheme" => true,
+		"localAutosaveInterval" => true,
+		"__experimentalDiscussionSettings" => true,
+		"__experimentalDashboardLink" => true,
+		"__experimentalEnableQuoteBlockV2" => true,
+		"__experimentalEnableListBlockV2" => true,
+	));
 }
 
 add_filter( 'block_editor_settings_all', 'gutenberg_get_block_editor_settings_mobile', PHP_INT_MAX );