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<title>[58443] trunk/src/wp-includes/class-wp-theme-json-resolver.php: Editor: Improve compatibility for `WP_Theme_JSON_Data`.</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/58443">58443</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/58443","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>joemcgill</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2024-06-19 16:39:07 +0000 (Wed, 19 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: Improve compatibility for `WP_Theme_JSON_Data`.

This checks that objects returned from any of the `wp_theme_json_data_` filters are `WP_Theme_JSON_Data` objects in order to avoid incompatibilities. Otherwise, reprocess the theme.json data as new `WP_Theme_JSON` objects to ensure the data matches the expectations of code consuming that data.

Follow-up to <a href="https://core.trac.wordpress.org/changeset/58185">[58185]</a>.

Props joemcgill, adamsilverstein, oandregal, ryelle, ocean90, pbearne.
See <a href="https://core.trac.wordpress.org/ticket/61112">#61112</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesclasswpthemejsonresolverphp">trunk/src/wp-includes/class-wp-theme-json-resolver.php</a></li>
</ul>

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<h3>Diff</h3>
<a id="trunksrcwpincludesclasswpthemejsonresolverphp"></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/class-wp-theme-json-resolver.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/class-wp-theme-json-resolver.php    2024-06-19 10:31:54 UTC (rev 58442)
+++ trunk/src/wp-includes/class-wp-theme-json-resolver.php      2024-06-19 16:39:07 UTC (rev 58443)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -172,9 +172,19 @@
</span><span class="cx" style="display: block; padding: 0 10px">                 *
</span><span class="cx" style="display: block; padding: 0 10px">                 * @param WP_Theme_JSON_Data $theme_json Class to access and update the underlying data.
</span><span class="cx" style="display: block; padding: 0 10px">                 */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $theme_json   = apply_filters( 'wp_theme_json_data_default', new WP_Theme_JSON_Data( $config, 'default' ) );
-               static::$core = $theme_json->get_theme_json();
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $theme_json = apply_filters( 'wp_theme_json_data_default', new WP_Theme_JSON_Data( $config, 'default' ) );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                /*
+                * Backward compatibility for extenders returning a WP_Theme_JSON_Data
+                * compatible class that is not a WP_Theme_JSON_Data object.
+                */
+               if ( $theme_json instanceof WP_Theme_JSON_Data ) {
+                       static::$core = $theme_json->get_theme_json();
+               } else {
+                       $config       = $theme_json->get_data();
+                       static::$core = new WP_Theme_JSON( $config, 'default' );
+               }
+
</ins><span class="cx" style="display: block; padding: 0 10px">                 return static::$core;
</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">@@ -263,9 +273,19 @@
</span><span class="cx" style="display: block; padding: 0 10px">                         *
</span><span class="cx" style="display: block; padding: 0 10px">                         * @param WP_Theme_JSON_Data $theme_json Class to access and update the underlying data.
</span><span class="cx" style="display: block; padding: 0 10px">                         */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        $theme_json    = apply_filters( 'wp_theme_json_data_theme', new WP_Theme_JSON_Data( $theme_json_data, 'theme' ) );
-                       static::$theme = $theme_json->get_theme_json();
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 $theme_json = apply_filters( 'wp_theme_json_data_theme', new WP_Theme_JSON_Data( $theme_json_data, 'theme' ) );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        /*
+                        * Backward compatibility for extenders returning a WP_Theme_JSON_Data
+                        * compatible class that is not a WP_Theme_JSON_Data object.
+                        */
+                       if ( $theme_json instanceof WP_Theme_JSON_Data ) {
+                               static::$theme = $theme_json->get_theme_json();
+                       } else {
+                               $config        = $theme_json->get_data();
+                               static::$theme = new WP_Theme_JSON( $config );
+                       }
+
</ins><span class="cx" style="display: block; padding: 0 10px">                         if ( $wp_theme->parent() ) {
</span><span class="cx" style="display: block; padding: 0 10px">                                // Get parent theme.json.
</span><span class="cx" style="display: block; padding: 0 10px">                                $parent_theme_json_file = $wp_theme->parent()->get_file_path( 'theme.json' );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -386,8 +406,19 @@
</span><span class="cx" style="display: block; padding: 0 10px">                 *
</span><span class="cx" style="display: block; padding: 0 10px">                 * @param WP_Theme_JSON_Data $theme_json Class to access and update the underlying data.
</span><span class="cx" style="display: block; padding: 0 10px">                 */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $theme_json     = apply_filters( 'wp_theme_json_data_blocks', new WP_Theme_JSON_Data( $config, 'blocks' ) );
-               static::$blocks = $theme_json->get_theme_json();
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $theme_json = apply_filters( 'wp_theme_json_data_blocks', new WP_Theme_JSON_Data( $config, 'blocks' ) );
+
+               /*
+                * Backward compatibility for extenders returning a WP_Theme_JSON_Data
+                * compatible class that is not a WP_Theme_JSON_Data object.
+                */
+               if ( $theme_json instanceof WP_Theme_JSON_Data ) {
+                       static::$blocks = $theme_json->get_theme_json();
+               } else {
+                       $config         = $theme_json->get_data();
+                       static::$blocks = new WP_Theme_JSON( $config, 'blocks' );
+               }
+
</ins><span class="cx" style="display: block; padding: 0 10px">                 return static::$blocks;
</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">@@ -523,7 +554,17 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                 * @param WP_Theme_JSON_Data $theme_json Class to access and update the underlying data.
</span><span class="cx" style="display: block; padding: 0 10px">                                 */
</span><span class="cx" style="display: block; padding: 0 10px">                                $theme_json = apply_filters( 'wp_theme_json_data_user', new WP_Theme_JSON_Data( $config, 'custom' ) );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                return $theme_json->get_theme_json();
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+                               /*
+                                * Backward compatibility for extenders returning a WP_Theme_JSON_Data
+                                * compatible class that is not a WP_Theme_JSON_Data object.
+                                */
+                               if ( $theme_json instanceof WP_Theme_JSON_Data ) {
+                                       return $theme_json->get_theme_json();
+                               } else {
+                                       $config = $theme_json->get_data();
+                                       return new WP_Theme_JSON( $config, 'custom' );
+                               }
</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">                        /*
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -545,9 +586,19 @@
</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">                /** This filter is documented in wp-includes/class-wp-theme-json-resolver.php */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $theme_json   = apply_filters( 'wp_theme_json_data_user', new WP_Theme_JSON_Data( $config, 'custom' ) );
-               static::$user = $theme_json->get_theme_json();
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $theme_json = apply_filters( 'wp_theme_json_data_user', new WP_Theme_JSON_Data( $config, 'custom' ) );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                /*
+                * Backward compatibility for extenders returning a WP_Theme_JSON_Data
+                * compatible class that is not a WP_Theme_JSON_Data object.
+                */
+               if ( $theme_json instanceof WP_Theme_JSON_Data ) {
+                       static::$user = $theme_json->get_theme_json();
+               } else {
+                       $config       = $theme_json->get_data();
+                       static::$user = new WP_Theme_JSON( $config, 'custom' );
+               }
+
</ins><span class="cx" style="display: block; padding: 0 10px">                 return static::$user;
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span></span></pre>
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