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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/57246">57246</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/57246","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>isabel_brison</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2024-01-08 06:12:00 +0000 (Mon, 08 Jan 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: add layout classes to legacy Group inner container.

Moves generated layout classes into the Group block inner container in classic themes, so that block gap support can work correctly.

Props flixos90, mukesh27.
Fixes <a href="https://core.trac.wordpress.org/ticket/60130">#60130</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesblocksupportslayoutphp">trunk/src/wp-includes/block-supports/layout.php</a></li>
<li><a href="#trunktestsphpunittestsblocksupportslayoutphp">trunk/tests/phpunit/tests/block-supports/layout.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludesblocksupportslayoutphp"></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/layout.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/block-supports/layout.php   2024-01-07 16:07:47 UTC (rev 57245)
+++ trunk/src/wp-includes/block-supports/layout.php     2024-01-08 06:12:00 UTC (rev 57246)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -638,7 +638,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">         * for features like the enhanced pagination of the Query block.
</span><span class="cx" style="display: block; padding: 0 10px">         */
</span><span class="cx" style="display: block; padding: 0 10px">        $container_class = wp_unique_prefixed_id(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                'wp-container-' . sanitize_title( $block['blockName'] ) . '-layout-'
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         'wp-container-' . sanitize_title( $block['blockName'] ) . '-is-layout-'
</ins><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">        // Set the correct layout type for blocks using legacy content width.
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -883,17 +883,45 @@
</span><span class="cx" style="display: block; padding: 0 10px">                return $block_content;
</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">-        $replace_regex   = sprintf(
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ /*
+        * This filter runs after the layout classnames have been added to the block, so they
+        * have to be removed from the outer wrapper and then added to the inner.
+        */
+       $layout_classes = array();
+       $processor      = new WP_HTML_Tag_Processor( $block_content );
+
+       if ( $processor->next_tag( array( 'class_name' => 'wp-block-group' ) ) ) {
+               foreach ( $processor->class_list() as $class_name ) {
+                       if ( str_contains( $class_name, 'is-layout-' ) ) {
+                               $layout_classes[] = $class_name;
+                               $processor->remove_class( $class_name );
+                       }
+               }
+       }
+
+       $content_without_layout_classes = $processor->get_updated_html();
+       $replace_regex                  = sprintf(
</ins><span class="cx" style="display: block; padding: 0 10px">                 '/(^\s*<%1$s\b[^>]*wp-block-group[^>]*>)(.*)(<\/%1$s>\s*$)/ms',
</span><span class="cx" style="display: block; padding: 0 10px">                preg_quote( $tag_name, '/' )
</span><span class="cx" style="display: block; padding: 0 10px">        );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        $updated_content = preg_replace_callback(
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $updated_content                = preg_replace_callback(
</ins><span class="cx" style="display: block; padding: 0 10px">                 $replace_regex,
</span><span class="cx" style="display: block; padding: 0 10px">                static function ( $matches ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        return $matches[1] . '<div class="wp-block-group__inner-container">' . $matches[2] . '</div>' . $matches[3];
</span><span class="cx" style="display: block; padding: 0 10px">                },
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $block_content
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $content_without_layout_classes
</ins><span class="cx" style="display: block; padding: 0 10px">         );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+       // Add layout classes to inner wrapper.
+       if ( ! empty( $layout_classes ) ) {
+               $processor = new WP_HTML_Tag_Processor( $updated_content );
+               if ( $processor->next_tag( array( 'class_name' => 'wp-block-group__inner-container' ) ) ) {
+                       foreach ( $layout_classes as $class_name ) {
+                               $processor->add_class( $class_name );
+                       }
+               }
+               $updated_content = $processor->get_updated_html();
+       }
</ins><span class="cx" style="display: block; padding: 0 10px">         return $updated_content;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span></span></pre></div>
<a id="trunktestsphpunittestsblocksupportslayoutphp"></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/layout.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/block-supports/layout.php       2024-01-07 16:07:47 UTC (rev 57245)
+++ trunk/tests/phpunit/tests/block-supports/layout.php 2024-01-08 06:12:00 UTC (rev 57246)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -252,4 +252,94 @@
</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">+
+       /**
+        * Check that wp_restore_group_inner_container() restores the legacy inner container on the Group block.
+        *
+        * @ticket 60130
+        *
+        * @covers ::wp_restore_group_inner_container
+        *
+        * @dataProvider data_restore_group_inner_container
+        *
+        * @param array  $args            Dataset to test.
+        * @param string $expected_output The expected output.
+        */
+       public function test_restore_group_inner_container( $args, $expected_output ) {
+               $actual_output = wp_restore_group_inner_container( $args['block_content'], $args['block'] );
+               $this->assertEquals( $expected_output, $actual_output );
+       }
+
+       /**
+        * Data provider for test_restore_group_inner_container.
+        *
+        * @return array
+        */
+       public function data_restore_group_inner_container() {
+               return array(
+                       'group block with existing inner container'    => array(
+                               'args'            => array(
+                                       'block_content' => '<div class="wp-block-group"><div class="wp-block-group__inner-container"></div></div>',
+                                       'block'         => array(
+                                               'blockName'    => 'core/group',
+                                               'attrs'        => array(
+                                                       'layout' => array(
+                                                               'type' => 'default',
+                                                       ),
+                                               ),
+                                               'innerBlocks'  => array(),
+                                               'innerHTML'    => '<div class="wp-block-group"><div class="wp-block-group__inner-container"></div></div>',
+                                               'innerContent' => array(
+                                                       '<div class="wp-block-group"><div class="wp-block-group__inner-container">',
+                                                       ' ',
+                                                       ' </div></div>',
+                                               ),
+                                       ),
+                               ),
+                               'expected_output' => '<div class="wp-block-group"><div class="wp-block-group__inner-container"></div></div>',
+                       ),
+                       'group block with no existing inner container' => array(
+                               'args'            => array(
+                                       'block_content' => '<div class="wp-block-group"></div>',
+                                       'block'         => array(
+                                               'blockName'    => 'core/group',
+                                               'attrs'        => array(
+                                                       'layout' => array(
+                                                               'type' => 'default',
+                                                       ),
+                                               ),
+                                               'innerBlocks'  => array(),
+                                               'innerHTML'    => '<div class="wp-block-group"></div>',
+                                               'innerContent' => array(
+                                                       '<div class="wp-block-group">',
+                                                       ' ',
+                                                       ' </div>',
+                                               ),
+                                       ),
+                               ),
+                               'expected_output' => '<div class="wp-block-group"><div class="wp-block-group__inner-container"></div></div>',
+                       ),
+                       'group block with layout classnames'           => array(
+                               'args'            => array(
+                                       'block_content' => '<div class="wp-block-group is-layout-constrained wp-block-group-is-layout-constrained"></div>',
+                                       'block'         => array(
+                                               'blockName'    => 'core/group',
+                                               'attrs'        => array(
+                                                       'layout' => array(
+                                                               'type' => 'default',
+                                                       ),
+                                               ),
+                                               'innerBlocks'  => array(),
+                                               'innerHTML'    => '<div class="wp-block-group"></div>',
+                                               'innerContent' => array(
+                                                       '<div class="wp-block-group">',
+                                                       ' ',
+                                                       ' </div>',
+                                               ),
+                                       ),
+                               ),
+                               'expected_output' => '<div class="wp-block-group"><div class="wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained"></div></div>',
+                       ),
+               );
+       }
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span></span></pre>
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