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<title>[58394] trunk: Editor: register block style variations defined by the theme using the init action.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/58394">58394</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/58394","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>oandregal</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2024-06-12 07:15:06 +0000 (Wed, 12 Jun 2024)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Editor: register block style variations defined by the theme using the init action.

Props oandregal, aaronrobertshaw, annezazu.

Follow-up to <a href="https://core.trac.wordpress.org/changeset/58264">[58264]</a>.
See <a href="https://core.trac.wordpress.org/ticket/61312">#61312</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesblocksupportsblockstylevariationsphp">trunk/src/wp-includes/block-supports/block-style-variations.php</a></li>
<li><a href="#trunksrcwpincludesrestapiendpointsclasswprestglobalstylescontrollerphp">trunk/src/wp-includes/rest-api/endpoints/class-wp-rest-global-styles-controller.php</a></li>
<li><a href="#trunktestsphpunittestsblocksupportsblockstylevariationsphp">trunk/tests/phpunit/tests/block-supports/block-style-variations.php</a></li>
<li><a href="#trunktestsphpunittestsrestapirestglobalstylescontrollerphp">trunk/tests/phpunit/tests/rest-api/rest-global-styles-controller.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludesblocksupportsblockstylevariationsphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/block-supports/block-style-variations.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/block-supports/block-style-variations.php   2024-06-12 06:09:10 UTC (rev 58393)
+++ trunk/src/wp-includes/block-supports/block-style-variations.php     2024-06-12 07:15:06 UTC (rev 58394)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -213,9 +213,6 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="cx" style="display: block; padding: 0 10px">  * Collects block style variation data for merging with theme.json data.
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * As each block style variation is processed it is registered if it hasn't
- * been already. This registration is required for later sanitization of
- * theme.json data.
</del><span class="cx" style="display: block; padding: 0 10px">  *
</span><span class="cx" style="display: block; padding: 0 10px">  * @since 6.6.0
</span><span class="cx" style="display: block; padding: 0 10px">  * @access private
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -224,7 +221,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">  *
</span><span class="cx" style="display: block; padding: 0 10px">  * @return array Block variations data to be merged under `styles.blocks`.
</span><span class="cx" style="display: block; padding: 0 10px">  */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-function wp_resolve_and_register_block_style_variations( $variations ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+function wp_resolve_block_style_variations( $variations ) {
</ins><span class="cx" style="display: block; padding: 0 10px">         $variations_data = array();
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        if ( empty( $variations ) ) {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -231,7 +228,6 @@
</span><span class="cx" style="display: block; padding: 0 10px">                return $variations_data;
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        $registry              = WP_Block_Styles_Registry::get_instance();
</del><span class="cx" style="display: block; padding: 0 10px">         $have_named_variations = ! wp_is_numeric_array( $variations );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        foreach ( $variations as $key => $variation ) {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -253,23 +249,9 @@
</span><span class="cx" style="display: block; padding: 0 10px">                 * Block style variations read in via standalone theme.json partials
</span><span class="cx" style="display: block; padding: 0 10px">                 * need to have their name set to the kebab case version of their title.
</span><span class="cx" style="display: block; padding: 0 10px">                 */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $variation_name  = $have_named_variations ? $key : _wp_to_kebab_case( $variation['title'] );
-               $variation_label = $variation['title'] ?? $variation_name;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $variation_name = $have_named_variations ? $key : _wp_to_kebab_case( $variation['title'] );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                foreach ( $supported_blocks as $block_type ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        $registered_styles = $registry->get_registered_styles_for_block( $block_type );
-
-                       // Register block style variation if it hasn't already been registered.
-                       if ( ! array_key_exists( $variation_name, $registered_styles ) ) {
-                               register_block_style(
-                                       $block_type,
-                                       array(
-                                               'name'  => $variation_name,
-                                               'label' => $variation_label,
-                                       )
-                               );
-                       }
-
</del><span class="cx" style="display: block; padding: 0 10px">                         // Add block style variation data under current block type.
</span><span class="cx" style="display: block; padding: 0 10px">                        $path = array( $block_type, 'variations', $variation_name );
</span><span class="cx" style="display: block; padding: 0 10px">                        _wp_array_set( $variations_data, $path, $variation_data );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -327,7 +309,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> function wp_resolve_block_style_variations_from_theme_style_variation( $theme_json ) {
</span><span class="cx" style="display: block; padding: 0 10px">        $theme_json_data   = $theme_json->get_data();
</span><span class="cx" style="display: block; padding: 0 10px">        $shared_variations = $theme_json_data['styles']['blocks']['variations'] ?? array();
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        $variations_data   = wp_resolve_and_register_block_style_variations( $shared_variations );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $variations_data   = wp_resolve_block_style_variations( $shared_variations );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        return wp_merge_block_style_variations_data( $variations_data, $theme_json, 'user' );
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -345,7 +327,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">  */
</span><span class="cx" style="display: block; padding: 0 10px"> function wp_resolve_block_style_variations_from_theme_json_partials( $theme_json ) {
</span><span class="cx" style="display: block; padding: 0 10px">        $block_style_variations = WP_Theme_JSON_Resolver::get_style_variations( 'block' );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        $variations_data        = wp_resolve_and_register_block_style_variations( $block_style_variations );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $variations_data        = wp_resolve_block_style_variations( $block_style_variations );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        return wp_merge_block_style_variations_data( $variations_data, $theme_json );
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -364,7 +346,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> function wp_resolve_block_style_variations_from_primary_theme_json( $theme_json ) {
</span><span class="cx" style="display: block; padding: 0 10px">        $theme_json_data        = $theme_json->get_data();
</span><span class="cx" style="display: block; padding: 0 10px">        $block_style_variations = $theme_json_data['styles']['blocks']['variations'] ?? array();
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        $variations_data        = wp_resolve_and_register_block_style_variations( $block_style_variations );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $variations_data        = wp_resolve_block_style_variations( $block_style_variations );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        return wp_merge_block_style_variations_data( $variations_data, $theme_json );
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -422,3 +404,97 @@
</span><span class="cx" style="display: block; padding: 0 10px"> add_filter( 'wp_theme_json_data_theme', 'wp_resolve_block_style_variations_from_styles_registry', 10, 1 );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> add_filter( 'wp_theme_json_data_user', 'wp_resolve_block_style_variations_from_theme_style_variation', 10, 1 );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+/**
+ * Registers any block style variations contained within the provided
+ * theme.json data.
+ *
+ * @since 6.6.0
+ * @access private
+ *
+ * @param array $variations Shared block style variations.
+ */
+function wp_register_block_style_variations_from_theme_json_data( $variations ) {
+       if ( empty( $variations ) ) {
+               return $variations;
+       }
+
+       $registry              = WP_Block_Styles_Registry::get_instance();
+       $have_named_variations = ! wp_is_numeric_array( $variations );
+
+       foreach ( $variations as $key => $variation ) {
+               $supported_blocks = $variation['blockTypes'] ?? array();
+
+               /*
+                * Standalone theme.json partial files for block style variations
+                * will have their styles under a top-level property by the same name.
+                * Variations defined within an existing theme.json or theme style
+                * variation will themselves already be the required styles data.
+                */
+               $variation_data = $variation['styles'] ?? $variation;
+
+               if ( empty( $variation_data ) ) {
+                       continue;
+               }
+
+               /*
+                * Block style variations read in via standalone theme.json partials
+                * need to have their name set to the kebab case version of their title.
+                */
+               $variation_name  = $have_named_variations ? $key : _wp_to_kebab_case( $variation['title'] );
+               $variation_label = $variation['title'] ?? $variation_name;
+
+               foreach ( $supported_blocks as $block_type ) {
+                       $registered_styles = $registry->get_registered_styles_for_block( $block_type );
+
+                       // Register block style variation if it hasn't already been registered.
+                       if ( ! array_key_exists( $variation_name, $registered_styles ) ) {
+                               register_block_style(
+                                       $block_type,
+                                       array(
+                                               'name'  => $variation_name,
+                                               'label' => $variation_label,
+                                       )
+                               );
+                       }
+               }
+       }
+}
+
+/**
+ * Register shared block style variations defined by the theme.
+ *
+ * These can come in three forms:
+ * - the theme's theme.json
+ * - the theme's partials (standalone files in `/styles` that only define block style variations)
+ * - the user's theme.json (for example, theme style variations the user selected)
+ *
+ * @since 6.6.0
+ * @access private
+ */
+function wp_register_block_style_variations_from_theme() {
+       // Partials from `/styles`.
+       $variations_partials = WP_Theme_JSON_Resolver::get_style_variations( 'block' );
+       wp_register_block_style_variations_from_theme_json_data( $variations_partials );
+
+       /*
+        * Pull the data from the specific origin instead of the merged data.
+        * This is because, for 6.6, we only support registering block style variations
+        * for the 'theme' and 'custom' origins but not for 'default' (core theme.json)
+        * or 'custom' (theme.json in a block).
+        *
+        * When/If we add support for every origin, we should switch to using the public API
+        * instead, e.g.: wp_get_global_styles( array( 'blocks', 'variations' ) ).
+        */
+
+       // theme.json of the theme.
+       $theme_json_theme = WP_Theme_JSON_Resolver::get_theme_data();
+       $variations_theme = $theme_json_theme->get_data()['styles']['blocks']['variations'] ?? array();
+       wp_register_block_style_variations_from_theme_json_data( $variations_theme );
+
+       // User data linked for this theme.
+       $theme_json_user = WP_Theme_JSON_Resolver::get_user_data();
+       $variations_user = $theme_json_user->get_data()['styles']['blocks']['variations'] ?? array();
+       wp_register_block_style_variations_from_theme_json_data( $variations_user );
+}
+add_action( 'init', 'wp_register_block_style_variations_from_theme' );
</ins></span></pre></div>
<a id="trunksrcwpincludesrestapiendpointsclasswprestglobalstylescontrollerphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/rest-api/endpoints/class-wp-rest-global-styles-controller.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/rest-api/endpoints/class-wp-rest-global-styles-controller.php       2024-06-12 06:09:10 UTC (rev 58393)
+++ trunk/src/wp-includes/rest-api/endpoints/class-wp-rest-global-styles-controller.php 2024-06-12 07:15:06 UTC (rev 58394)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -231,6 +231,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><span class="cx" style="display: block; padding: 0 10px">         * @since 5.9.0
</span><span class="cx" style="display: block; padding: 0 10px">         * @since 6.2.0 Added validation of styles.css property.
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * @since 6.6.0 Added registration of newly created style variations provided by the user.
</ins><span class="cx" style="display: block; padding: 0 10px">          *
</span><span class="cx" style="display: block; padding: 0 10px">         * @param WP_REST_Request $request Request object.
</span><span class="cx" style="display: block; padding: 0 10px">         * @return stdClass|WP_Error Prepared item on success. WP_Error on when the custom CSS is not valid.
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -263,6 +264,25 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        } elseif ( isset( $existing_config['styles'] ) ) {
</span><span class="cx" style="display: block; padding: 0 10px">                                $config['styles'] = $existing_config['styles'];
</span><span class="cx" style="display: block; padding: 0 10px">                        }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+                       /*
+                        * If the incoming request is going to create a new variation
+                        * that is not yet registered, we register it here.
+                        * This is because the variations are registered on init,
+                        * but we want this endpoint to return the new variation immediately:
+                        * if we don't register it, it'll be stripped out of the response
+                        * just in this request (subsequent ones will be ok).
+                        * Take the variations defined in styles.blocks.variations from the incoming request
+                        * that are not part of the $exsting_config.
+                        */
+                       if ( isset( $request['styles']['blocks']['variations'] ) ) {
+                               $existing_variations = isset( $existing_config['styles']['blocks']['variations'] ) ? $existing_config['styles']['blocks']['variations'] : array();
+                               $new_variations      = array_diff_key( $request['styles']['blocks']['variations'], $existing_variations );
+                               if ( ! empty( $new_variations ) ) {
+                                       wp_register_block_style_variations_from_theme_json_data( $new_variations );
+                               }
+                       }
+
</ins><span class="cx" style="display: block; padding: 0 10px">                         if ( isset( $request['settings'] ) ) {
</span><span class="cx" style="display: block; padding: 0 10px">                                $config['settings'] = $request['settings'];
</span><span class="cx" style="display: block; padding: 0 10px">                        } elseif ( isset( $existing_config['settings'] ) ) {
</span></span></pre></div>
<a id="trunktestsphpunittestsblocksupportsblockstylevariationsphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/block-supports/block-style-variations.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/block-supports/block-style-variations.php       2024-06-12 06:09:10 UTC (rev 58393)
+++ trunk/tests/phpunit/tests/block-supports/block-style-variations.php 2024-06-12 07:15:06 UTC (rev 58394)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -65,6 +65,13 @@
</span><span class="cx" style="display: block; padding: 0 10px">        public function test_add_registered_block_styles_to_theme_data() {
</span><span class="cx" style="display: block; padding: 0 10px">                switch_theme( 'block-theme' );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                /*
+                * Trigger block style registration that occurs on `init` action.
+                * do_action( 'init' ) could be used here however this direct call
+                * means only the updates being tested are performed.
+                */
+               wp_register_block_style_variations_from_theme();
+
</ins><span class="cx" style="display: block; padding: 0 10px">                 $variation_styles_data = array(
</span><span class="cx" style="display: block; padding: 0 10px">                        'color'    => array(
</span><span class="cx" style="display: block; padding: 0 10px">                                'background' => 'darkslateblue',
</span></span></pre></div>
<a id="trunktestsphpunittestsrestapirestglobalstylescontrollerphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/rest-api/rest-global-styles-controller.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/rest-api/rest-global-styles-controller.php      2024-06-12 06:09:10 UTC (rev 58393)
+++ trunk/tests/phpunit/tests/rest-api/rest-global-styles-controller.php        2024-06-12 07:15:06 UTC (rev 58394)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -603,6 +603,55 @@
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        /**
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * Tests the submission of a custom block style variation that was defined
+        * within a theme style variation and wouldn't be registered at the time
+        * of saving via the API.
+        *
+        * @covers WP_REST_Global_Styles_Controller_Gutenberg::update_item
+        * @ticket 61312
+        */
+       public function test_update_item_with_custom_block_style_variations() {
+               wp_set_current_user( self::$admin_id );
+               if ( is_multisite() ) {
+                       grant_super_admin( self::$admin_id );
+               }
+
+               $group_variations = array(
+                       'fromThemeStyleVariation' => array(
+                               'color' => array(
+                                       'background' => '#ffffff',
+                                       'text'       => '#000000',
+                               ),
+                       ),
+               );
+
+               $request = new WP_REST_Request( 'PUT', '/wp/v2/global-styles/' . self::$global_styles_id );
+               $request->set_body_params(
+                       array(
+                               'styles' => array(
+                                       'blocks' => array(
+                                               'variations' => array(
+                                                       'fromThemeStyleVariation' => array(
+                                                               'blockTypes' => array( 'core/group', 'core/columns' ),
+                                                               'color'      => array(
+                                                                       'background' => '#000000',
+                                                                       'text'       => '#ffffff',
+                                                               ),
+                                                       ),
+                                               ),
+                                               'core/group' => array(
+                                                       'variations' => $group_variations,
+                                               ),
+                                       ),
+                               ),
+                       )
+               );
+               $response = rest_get_server()->dispatch( $request );
+               $data     = $response->get_data();
+               $this->assertSame( $group_variations, $data['styles']['blocks']['core/group']['variations'] );
+       }
+
+       /**
</ins><span class="cx" style="display: block; padding: 0 10px">          * @doesNotPerformAssertions
</span><span class="cx" style="display: block; padding: 0 10px">         */
</span><span class="cx" style="display: block; padding: 0 10px">        public function test_delete_item() {
</span></span></pre>
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