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<title>[56644] trunk: Blocks: Change `traverse_and_serialize_block(s)`'s callback signature.</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/56644">56644</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/56644","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>Bernhard Reiter</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2023-09-21 08:32:52 +0000 (Thu, 21 Sep 2023)</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'>Blocks: Change `traverse_and_serialize_block(s)`'s callback signature.

During work on <a href="https://core.trac.wordpress.org/ticket/59399">#59399</a>, it was discovered that ''sibling'' block insertion wasn't likely going to work the way it was planned, which required devising an alternative solution. This new solution requires some changes to `traverse_and_serialize_block(s)`:

- Change the signature of the existing callback such that:
  - the return value is a string that will be prepended to the result of the inner block traversal and serialization;
  - the function arguments are: a ''reference'' to the current block (so it can be modified inline, which is important e.g. for `theme` attribute insertion), the parent block, and the previous block (instead of the block index and chunk index).
- Add a second callback argument to `traverse_and_serialize_block(s)`, which is called ''after'' the block is traversed and serialized.
  - Its function arguments are a reference to the current block, the parent block, and the next block.

Props gziolo.
Fixes <a href="https://core.trac.wordpress.org/ticket/59412">#59412</a>. See <a href="https://core.trac.wordpress.org/ticket/59313">#59313</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesblocktemplateutilsphp">trunk/src/wp-includes/block-template-utils.php</a></li>
<li><a href="#trunksrcwpincludesblocksphp">trunk/src/wp-includes/blocks.php</a></li>
<li><a href="#trunktestsphpunittestsblocktemplateutilsphp">trunk/tests/phpunit/tests/block-template-utils.php</a></li>
<li><a href="#trunktestsphpunittestsblocksserializephp">trunk/tests/phpunit/tests/blocks/serialize.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludesblocktemplateutilsphp"></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-template-utils.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/block-template-utils.php    2023-09-21 06:33:48 UTC (rev 56643)
+++ trunk/src/wp-includes/block-template-utils.php      2023-09-21 08:32:52 UTC (rev 56644)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -515,9 +515,9 @@
</span><span class="cx" style="display: block; padding: 0 10px">  * @access private
</span><span class="cx" style="display: block; padding: 0 10px">  *
</span><span class="cx" style="display: block; padding: 0 10px">  * @param array $block a parsed block.
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * @return array Updated block.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * @return void
</ins><span class="cx" style="display: block; padding: 0 10px">  */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-function _inject_theme_attribute_in_template_part_block( $block ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+function _inject_theme_attribute_in_template_part_block( &$block ) {
</ins><span class="cx" style="display: block; padding: 0 10px">         if (
</span><span class="cx" style="display: block; padding: 0 10px">                'core/template-part' === $block['blockName'] &&
</span><span class="cx" style="display: block; padding: 0 10px">                ! isset( $block['attrs']['theme'] )
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -524,7 +524,6 @@
</span><span class="cx" style="display: block; padding: 0 10px">        ) {
</span><span class="cx" style="display: block; padding: 0 10px">                $block['attrs']['theme'] = get_stylesheet();
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        return $block;
</del><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></span></pre></div>
<a id="trunksrcwpincludesblocksphp"></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/blocks.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/blocks.php  2023-09-21 06:33:48 UTC (rev 56643)
+++ trunk/src/wp-includes/blocks.php    2023-09-21 08:32:52 UTC (rev 56644)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -886,38 +886,68 @@
</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><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * Traverses the block applying transformations using the callback provided and returns the content of a block,
- * including comment delimiters, serializing all attributes from the given parsed block.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * Traverses a parsed block tree and applies callbacks before and after serializing it.
</ins><span class="cx" style="display: block; padding: 0 10px">  *
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * This should be used when there is a need to modify the saved block.
- * Prefer `serialize_block` when preparing a block to be saved to post content.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * Recursively traverses the block and its inner blocks and applies the two callbacks provided as
+ * arguments, the first one before serializing the block, and the second one after serializing it.
+ * If either callback returns a string value, it will be prepended and appended to the serialized
+ * block markup, respectively.
</ins><span class="cx" style="display: block; padding: 0 10px">  *
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * The callbacks will receive a reference to the current block as their first argument, so that they
+ * can also modify it, and the current block's parent block as second argument. Finally, the
+ * `$pre_callback` receives the previous block, whereas the `$post_callback` receives
+ * the next block as third argument.
+ *
+ * Serialized blocks are returned including comment delimiters, and with all attributes serialized.
+ *
+ * This function should be used when there is a need to modify the saved block, or to inject markup
+ * into the return value. Prefer `serialize_block` when preparing a block to be saved to post content.
+ *
</ins><span class="cx" style="display: block; padding: 0 10px">  * @since 6.4.0
</span><span class="cx" style="display: block; padding: 0 10px">  *
</span><span class="cx" style="display: block; padding: 0 10px">  * @see serialize_block()
</span><span class="cx" style="display: block; padding: 0 10px">  *
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * @param array    $block    A representative array of a single parsed block object. See WP_Block_Parser_Block.
- * @param callable $callback Callback to run on each block in the tree before serialization.
- *                           It is called with the following arguments: $block, $parent_block, $block_index, $chunk_index.
- * @return string String of rendered HTML.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * @param array    $block         A representative array of a single parsed block object. See WP_Block_Parser_Block.
+ * @param callable $pre_callback  Callback to run on each block in the tree before it is traversed and serialized.
+ *                                It is called with the following arguments: &$block, $parent_block, $previous_block.
+ *                                Its string return value will be prepended to the serialized block markup.
+ * @param callable $post_callback Callback to run on each block in the tree after it is traversed and serialized.
+ *                                It is called with the following arguments: &$block, $parent_block, $next_block.
+ *                                Its string return value will be appended to the serialized block markup.
+ * @return string Serialized block markup.
</ins><span class="cx" style="display: block; padding: 0 10px">  */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-function traverse_and_serialize_block( $block, $callback ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+function traverse_and_serialize_block( $block, $pre_callback = null, $post_callback = null ) {
</ins><span class="cx" style="display: block; padding: 0 10px">         $block_content = '';
</span><span class="cx" style="display: block; padding: 0 10px">        $block_index   = 0;
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        foreach ( $block['innerContent'] as $chunk_index => $chunk ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ foreach ( $block['innerContent'] as $chunk ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                 if ( is_string( $chunk ) ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        $block_content .= $chunk;
</span><span class="cx" style="display: block; padding: 0 10px">                } else {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        $inner_block = call_user_func(
-                               $callback,
-                               $block['innerBlocks'][ $block_index ],
-                               $block,
-                               $block_index,
-                               $chunk_index
-                       );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 $inner_block = $block['innerBlocks'][ $block_index ];
+
+                       if ( is_callable( $pre_callback ) ) {
+                               $prev = 0 === $block_index
+                                       ? null
+                                       : $block['innerBlocks'][ $block_index - 1 ];
+                               $block_content .= call_user_func_array(
+                                       $pre_callback,
+                                       array( &$inner_block, $block, $prev )
+                               );
+                       }
+
+                       $block_content .= traverse_and_serialize_block( $inner_block, $pre_callback, $post_callback );
+
+                       if ( is_callable( $post_callback ) ) {
+                               $next = count( $block['innerBlocks'] ) - 1 === $block_index
+                                       ? null
+                                       : $block['innerBlocks'][ $block_index + 1 ];
+                               $block_content .= call_user_func_array(
+                                       $post_callback,
+                                       array( &$inner_block, $block, $next )
+                               );
+                       }
</ins><span class="cx" style="display: block; padding: 0 10px">                         $block_index++;
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        $block_content .= traverse_and_serialize_block( $inner_block, $callback );
</del><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><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -933,27 +963,59 @@
</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><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * Traverses the blocks applying transformations using the callback provided,
- * and returns a joined string of the aggregate serialization of the given parsed blocks.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * Given an array of parsed block trees, applies callbacks before and after serializing them and
+ * returns their concatenated output.
</ins><span class="cx" style="display: block; padding: 0 10px">  *
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * This should be used when there is a need to modify the saved blocks.
- * Prefer `serialize_blocks` when preparing blocks to be saved to post content.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * Recursively traverses the blocks and their inner blocks and applies the two callbacks provided as
+ * arguments, the first one before serializing a block, and the second one after serializing.
+ * If either callback returns a string value, it will be prepended and appended to the serialized
+ * block markup, respectively.
</ins><span class="cx" style="display: block; padding: 0 10px">  *
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * The callbacks will receive a reference to the current block as their first argument, so that they
+ * can also modify it, and the current block's parent block as second argument. Finally, the
+ * `$pre_callback` receives the previous block, whereas the `$post_callback` receives
+ * the next block as third argument.
+ *
+ * Serialized blocks are returned including comment delimiters, and with all attributes serialized.
+ *
+ * This function should be used when there is a need to modify the saved blocks, or to inject markup
+ * into the return value. Prefer `serialize_blocks` when preparing blocks to be saved to post content.
+ *
</ins><span class="cx" style="display: block; padding: 0 10px">  * @since 6.4.0
</span><span class="cx" style="display: block; padding: 0 10px">  *
</span><span class="cx" style="display: block; padding: 0 10px">  * @see serialize_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">- * @param array[]  $blocks   An array of representative arrays of parsed block objects. See serialize_block().
- * @param callable $callback Callback to run on each block in the tree before serialization.
- *                           It is called with the following arguments: $block, $parent_block, $block_index, $chunk_index.
- * @return string String of rendered HTML.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * @param array[]  $blocks        An array of parsed blocks. See WP_Block_Parser_Block.
+ * @param callable $pre_callback  Callback to run on each block in the tree before it is traversed and serialized.
+ *                                It is called with the following arguments: &$block, $parent_block, $previous_block.
+ *                                Its string return value will be prepended to the serialized block markup.
+ * @param callable $post_callback Callback to run on each block in the tree after it is traversed and serialized.
+ *                                It is called with the following arguments: &$block, $parent_block, $next_block.
+ *                                Its string return value will be appended to the serialized block markup.
+ * @return string Serialized block markup.
</ins><span class="cx" style="display: block; padding: 0 10px">  */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-function traverse_and_serialize_blocks( $blocks, $callback ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+function traverse_and_serialize_blocks( $blocks, $pre_callback = null, $post_callback = null ) {
</ins><span class="cx" style="display: block; padding: 0 10px">         $result = '';
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        foreach ( $blocks as $block ) {
-               // At the top level, there is no parent block, block index, or chunk index to pass to the callback.
-               $block = call_user_func( $callback, $block );
-               $result .= traverse_and_serialize_block( $block, $callback );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ foreach ( $blocks as $index => $block ) {
+               if ( is_callable( $pre_callback ) ) {
+                       $prev = 0 === $index
+                               ? null
+                               : $blocks[ $index - 1 ];
+                       $result .= call_user_func_array(
+                               $pre_callback,
+                               array( &$block, null, $prev ) // At the top level, there is no parent block to pass to the callback.
+                       );
+               }
+               $result .= traverse_and_serialize_block( $block, $pre_callback, $post_callback );
+               if ( is_callable( $post_callback ) ) {
+                       $next = count( $blocks ) - 1 === $index
+                               ? null
+                               : $blocks[ $index + 1 ];
+                       $result .= call_user_func_array(
+                               $post_callback,
+                               array( &$block, null, $next ) // At the top level, there is no parent block to pass to the callback.
+                       );
+               }
</ins><span class="cx" style="display: block; padding: 0 10px">         }
</span><span class="cx" style="display: block; padding: 0 10px">        return $result;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span></span></pre></div>
<a id="trunktestsphpunittestsblocktemplateutilsphp"></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-template-utils.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/block-template-utils.php        2023-09-21 06:33:48 UTC (rev 56643)
+++ trunk/tests/phpunit/tests/block-template-utils.php  2023-09-21 08:32:52 UTC (rev 56644)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -225,7 +225,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">         * @covers ::_inject_theme_attribute_in_template_part_block
</span><span class="cx" style="display: block; padding: 0 10px">         */
</span><span class="cx" style="display: block; padding: 0 10px">        public function test_inject_theme_attribute_in_template_part_block() {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $template_part_block_without_theme_attribute = array(
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $template_part_block = array(
</ins><span class="cx" style="display: block; padding: 0 10px">                         'blockName'    => 'core/template-part',
</span><span class="cx" style="display: block; padding: 0 10px">                        'attrs'        => array(
</span><span class="cx" style="display: block; padding: 0 10px">                                'slug'      => 'header',
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -238,7 +238,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        'innerBlocks'  => array(),
</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">-                $actual   = _inject_theme_attribute_in_template_part_block( $template_part_block_without_theme_attribute );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         _inject_theme_attribute_in_template_part_block( $template_part_block );
</ins><span class="cx" style="display: block; padding: 0 10px">                 $expected = array(
</span><span class="cx" style="display: block; padding: 0 10px">                        'blockName'    => 'core/template-part',
</span><span class="cx" style="display: block; padding: 0 10px">                        'attrs'        => array(
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -254,7 +254,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                );
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertSame(
</span><span class="cx" style="display: block; padding: 0 10px">                        $expected,
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        $actual,
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 $template_part_block,
</ins><span class="cx" style="display: block; padding: 0 10px">                         '`theme` attribute was not correctly injected in template part block.'
</span><span class="cx" style="display: block; padding: 0 10px">                );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -265,7 +265,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">         * @covers ::_inject_theme_attribute_in_template_part_block
</span><span class="cx" style="display: block; padding: 0 10px">         */
</span><span class="cx" style="display: block; padding: 0 10px">        public function test_not_inject_theme_attribute_in_template_part_block_theme_attribute_exists() {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $template_part_block_with_existing_theme_attribute = array(
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $template_part_block = array(
</ins><span class="cx" style="display: block; padding: 0 10px">                         'blockName'    => 'core/template-part',
</span><span class="cx" style="display: block; padding: 0 10px">                        'attrs'        => array(
</span><span class="cx" style="display: block; padding: 0 10px">                                'slug'      => 'header',
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -279,10 +279,11 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        'innerBlocks'  => array(),
</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">-                $actual = _inject_theme_attribute_in_template_part_block( $template_part_block_with_existing_theme_attribute );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $expected = $template_part_block;
+               _inject_theme_attribute_in_template_part_block( $template_part_block );
</ins><span class="cx" style="display: block; padding: 0 10px">                 $this->assertSame(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        $template_part_block_with_existing_theme_attribute,
-                       $actual,
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 $expected,
+                       $template_part_block,
</ins><span class="cx" style="display: block; padding: 0 10px">                         'Existing `theme` attribute in template part block was not respected by attribute injection.'
</span><span class="cx" style="display: block; padding: 0 10px">                );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -301,10 +302,11 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        'innerBlocks'  => array(),
</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">-                $actual = _inject_theme_attribute_in_template_part_block( $non_template_part_block );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $expected = $non_template_part_block;
+               _inject_theme_attribute_in_template_part_block( $non_template_part_block );
</ins><span class="cx" style="display: block; padding: 0 10px">                 $this->assertSame(
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        $expected,
</ins><span class="cx" style="display: block; padding: 0 10px">                         $non_template_part_block,
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        $actual,
</del><span class="cx" style="display: block; padding: 0 10px">                         '`theme` attribute injection modified non-template-part block.'
</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="trunktestsphpunittestsblocksserializephp"></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/blocks/serialize.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/blocks/serialize.php    2023-09-21 06:33:48 UTC (rev 56643)
+++ trunk/tests/phpunit/tests/blocks/serialize.php      2023-09-21 08:32:52 UTC (rev 56644)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -58,6 +58,7 @@
</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">         * @ticket 59327
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * @ticket 59412
</ins><span class="cx" style="display: block; padding: 0 10px">          *
</span><span class="cx" style="display: block; padding: 0 10px">         * @covers ::traverse_and_serialize_blocks
</span><span class="cx" style="display: block; padding: 0 10px">         */
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -73,15 +74,15 @@
</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><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        public static function add_attribute_to_inner_block( $block ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ public static function add_attribute_to_inner_block( &$block ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                 if ( 'core/inner' === $block['blockName'] ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        $block['attrs']['myattr'] = 'myvalue';
</span><span class="cx" style="display: block; padding: 0 10px">                }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                return $block;
</del><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><span class="cx" style="display: block; padding: 0 10px">         * @ticket 59327
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * @ticket 59412
</ins><span class="cx" style="display: block; padding: 0 10px">          *
</span><span class="cx" style="display: block; padding: 0 10px">         * @covers ::traverse_and_serialize_blocks
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -92,12 +93,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">        public function test_traverse_and_serialize_identity_from_parsed( $original ) {
</span><span class="cx" style="display: block; padding: 0 10px">                $blocks = parse_blocks( $original );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $actual = traverse_and_serialize_blocks(
-                       $blocks,
-                       function ( $block ) {
-                               return $block;
-                       }
-               );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $actual = traverse_and_serialize_blocks( $blocks );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertSame( $original, $actual );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span></span></pre>
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