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<title>[58936] trunk: Background images: resolve theme.json dynamic ref values and ensure appropriate style default values </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/58936">58936</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/58936","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>ramonopoly</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2024-08-26 05:38:05 +0000 (Mon, 26 Aug 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'>Background images: resolve theme.json dynamic ref values and ensure appropriate style default values 

The commit syncs the following changes from Gutenberg:

- Background images: add support for theme.json ref value resolution gutenberg<a href="https://core.trac.wordpress.org/ticket/64128">#64128</a>
- Background images: ensure appropriate default values gutenberg<a href="https://core.trac.wordpress.org/ticket/64192">#64192</a>
- Background image: ensure consistency with defaults and fix reset/remove functionality gutenberg<a href="https://core.trac.wordpress.org/ticket/64328">#64328</a>

These changes brings consistency to the default background image styles WordPress applies to user uploaded images, and adds support for ref resolution to "background" style properties.

Props andrewserong, aaronrobertshaw.  

Fixes <a href="https://core.trac.wordpress.org/ticket/61858">#61858</a></pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesblocksupportsbackgroundphp">trunk/src/wp-includes/block-supports/background.php</a></li>
<li><a href="#trunksrcwpincludesclasswpthemejsonphp">trunk/src/wp-includes/class-wp-theme-json.php</a></li>
<li><a href="#trunktestsphpunittestsblocksupportswpRenderBackgroundSupportphp">trunk/tests/phpunit/tests/block-supports/wpRenderBackgroundSupport.php</a></li>
<li><a href="#trunktestsphpunitteststhemewpThemeJsonphp">trunk/tests/phpunit/tests/theme/wpThemeJson.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludesblocksupportsbackgroundphp"></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/background.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/block-supports/background.php       2024-08-25 23:47:01 UTC (rev 58935)
+++ trunk/src/wp-includes/block-supports/background.php 2024-08-26 05:38:05 UTC (rev 58936)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -75,7 +75,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                // If the background size is set to `contain` and no position is set, set the position to `center`.
</span><span class="cx" style="display: block; padding: 0 10px">                if ( 'contain' === $background_styles['backgroundSize'] && ! $background_styles['backgroundPosition'] ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        $background_styles['backgroundPosition'] = 'center';
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 $background_styles['backgroundPosition'] = '50% 50%';
</ins><span class="cx" style="display: block; padding: 0 10px">                 }
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span></span></pre></div>
<a id="trunksrcwpincludesclasswpthemejsonphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/class-wp-theme-json.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/class-wp-theme-json.php     2024-08-25 23:47:01 UTC (rev 58935)
+++ trunk/src/wp-includes/class-wp-theme-json.php       2024-08-26 05:38:05 UTC (rev 58936)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2295,7 +2295,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><span class="cx" style="display: block; padding: 0 10px">         *     array(
</span><span class="cx" style="display: block; padding: 0 10px">         *       'name'  => 'property_name',
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-         *       'value' => 'property_value,
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+  *       'value' => 'property_value',
</ins><span class="cx" style="display: block; padding: 0 10px">          *     )
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><span class="cx" style="display: block; padding: 0 10px">         * @since 5.8.0
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2303,6 +2303,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">         * @since 6.1.0 Added `$theme_json`, `$selector`, and `$use_root_padding` parameters.
</span><span class="cx" style="display: block; padding: 0 10px">         * @since 6.5.0 Output a `min-height: unset` rule when `aspect-ratio` is set.
</span><span class="cx" style="display: block; padding: 0 10px">         * @since 6.6.0 Pass current theme JSON settings to wp_get_typography_font_size_value(), and process background properties.
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * @since 6.7.0 `ref` resolution of background properties, and assigning custom default values.
</ins><span class="cx" style="display: block; padding: 0 10px">          *
</span><span class="cx" style="display: block; padding: 0 10px">         * @param array   $styles Styles to process.
</span><span class="cx" style="display: block; padding: 0 10px">         * @param array   $settings Theme settings.
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2356,11 +2357,28 @@
</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">-                        // Processes background styles.
-                       if ( 'background' === $value_path[0] && isset( $styles['background'] ) ) {
-                               $background_styles = wp_style_engine_get_styles( array( 'background' => $styles['background'] ) );
-                               $value             = isset( $background_styles['declarations'][ $css_property ] ) ? $background_styles['declarations'][ $css_property ] : $value;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 /*
+                        * Processes background image styles.
+                        * If the value is a URL, it will be converted to a CSS `url()` value.
+                        * For uploaded image (images with a database ID), apply size and position defaults,
+                        * equal to those applied in block supports in lib/background.php.
+                        */
+                       if ( 'background-image' === $css_property && ! empty( $value ) ) {
+                               $background_styles = wp_style_engine_get_styles(
+                                       array( 'background' => array( 'backgroundImage' => $value ) )
+                               );
+                               $value             = $background_styles['declarations'][ $css_property ];
</ins><span class="cx" style="display: block; padding: 0 10px">                         }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        if ( empty( $value ) && static::ROOT_BLOCK_SELECTOR !== $selector && ! empty( $styles['background']['backgroundImage']['id'] ) ) {
+                               if ( 'background-size' === $css_property ) {
+                                       $value = 'cover';
+                               }
+                               // If the background size is set to `contain` and no position is set, set the position to `center`.
+                               if ( 'background-position' === $css_property ) {
+                                       $background_size = $styles['background']['backgroundSize'] ?? null;
+                                       $value           = 'contain' === $background_size ? '50% 50%' : null;
+                               }
+                       }
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                        // Skip if empty and not "0" or value represents array of longhand values.
</span><span class="cx" style="display: block; padding: 0 10px">                        $has_missing_value = empty( $value ) && ! is_numeric( $value );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2421,6 +2439,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">         *              to the standard form "--wp--preset--color--secondary".
</span><span class="cx" style="display: block; padding: 0 10px">         *              This is already done by the sanitize method,
</span><span class="cx" style="display: block; padding: 0 10px">         *              so every property will be in the standard form.
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * @since 6.7.0 Added support for background image refs.
</ins><span class="cx" style="display: block; padding: 0 10px">          *
</span><span class="cx" style="display: block; padding: 0 10px">         * @param array $styles Styles subtree.
</span><span class="cx" style="display: block; padding: 0 10px">         * @param array $path   Which property to process.
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2437,14 +2456,18 @@
</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 converts references to a path to the value at that path
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                 * where the values is an array with a "ref" key, pointing to a path.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+          * where the value is an array with a "ref" key, pointing to a path.
</ins><span class="cx" style="display: block; padding: 0 10px">                  * For example: { "ref": "style.color.background" } => "#fff".
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 * In the case of backgroundImage, if both a ref and a URL are present in the value,
+                * the URL takes precedence and the ref is ignored.
</ins><span class="cx" style="display: block; padding: 0 10px">                  */
</span><span class="cx" style="display: block; padding: 0 10px">                if ( is_array( $value ) && isset( $value['ref'] ) ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        $value_path = explode( '.', $value['ref'] );
</span><span class="cx" style="display: block; padding: 0 10px">                        $ref_value  = _wp_array_get( $theme_json, $value_path );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        // Background Image refs can refer to a string or an array containing a URL string.
+                       $ref_value_url = $ref_value['url'] ?? null;
</ins><span class="cx" style="display: block; padding: 0 10px">                         // Only use the ref value if we find anything.
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        if ( ! empty( $ref_value ) && is_string( $ref_value ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 if ( ! empty( $ref_value ) && ( is_string( $ref_value ) || is_string( $ref_value_url ) ) ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                                 $value = $ref_value;
</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">@@ -3083,6 +3106,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><span class="cx" style="display: block; padding: 0 10px">         * @since 5.8.0
</span><span class="cx" style="display: block; padding: 0 10px">         * @since 5.9.0 Duotone preset also has origins.
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * @since 6.7.0 Replace background image objects during merge.
</ins><span class="cx" style="display: block; padding: 0 10px">          *
</span><span class="cx" style="display: block; padding: 0 10px">         * @param WP_Theme_JSON $incoming Data to merge.
</span><span class="cx" style="display: block; padding: 0 10px">         */
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -3206,6 +3230,25 @@
</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">+
+               /*
+                * Style values are merged at the leaf level, however
+                * some values provide exceptions, namely style values that are
+                * objects and represent unique definitions for the style.
+                */
+               $style_nodes = static::get_styles_block_nodes();
+               foreach ( $style_nodes as $style_node ) {
+                       $path = $style_node['path'];
+                       /*
+                        * Background image styles should be replaced, not merged,
+                        * as they themselves are specific object definitions for the style.
+                        */
+                       $background_image_path = array_merge( $path, static::PROPERTIES_METADATA['background-image'] );
+                       $content               = _wp_array_get( $incoming_data, $background_image_path, null );
+                       if ( isset( $content ) ) {
+                               _wp_array_set( $this->theme_json, $background_image_path, $content );
+                       }
+               }
</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></pre></div>
<a id="trunktestsphpunittestsblocksupportswpRenderBackgroundSupportphp"></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/wpRenderBackgroundSupport.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/block-supports/wpRenderBackgroundSupport.php    2024-08-25 23:47:01 UTC (rev 58935)
+++ trunk/tests/phpunit/tests/block-supports/wpRenderBackgroundSupport.php      2024-08-26 05:38:05 UTC (rev 58936)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -70,6 +70,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">         * @ticket 60175
</span><span class="cx" style="display: block; padding: 0 10px">         * @ticket 61123
</span><span class="cx" style="display: block; padding: 0 10px">         * @ticket 61720
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * @ticket 61858
</ins><span class="cx" style="display: block; padding: 0 10px">          *
</span><span class="cx" style="display: block; padding: 0 10px">         * @covers ::wp_render_background_support
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -154,7 +155,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                        'backgroundSize'       => 'contain',
</span><span class="cx" style="display: block; padding: 0 10px">                                        'backgroundAttachment' => 'fixed',
</span><span class="cx" style="display: block; padding: 0 10px">                                ),
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                'expected_wrapper'    => '<div class="has-background" style="background-image:url(&#039;https://example.com/image.jpg&#039;);background-position:center;background-repeat:no-repeat;background-size:contain;background-attachment:fixed;">Content</div>',
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         'expected_wrapper'    => '<div class="has-background" style="background-image:url(&#039;https://example.com/image.jpg&#039;);background-position:50% 50%;background-repeat:no-repeat;background-size:contain;background-attachment:fixed;">Content</div>',
</ins><span class="cx" style="display: block; padding: 0 10px">                                 'wrapper'             => '<div>Content</div>',
</span><span class="cx" style="display: block; padding: 0 10px">                        ),
</span><span class="cx" style="display: block; padding: 0 10px">                        'background image style is appended if a style attribute already exists' => array(
</span></span></pre></div>
<a id="trunktestsphpunitteststhemewpThemeJsonphp"></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/theme/wpThemeJson.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/theme/wpThemeJson.php   2024-08-25 23:47:01 UTC (rev 58935)
+++ trunk/tests/phpunit/tests/theme/wpThemeJson.php     2024-08-26 05:38:05 UTC (rev 58936)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2335,6 +2335,115 @@
</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">+         * @ticket 61858
+        */
+       public function test_merge_incoming_background_styles() {
+               $theme_json = new WP_Theme_JSON(
+                       array(
+                               'version' => WP_Theme_JSON::LATEST_SCHEMA,
+                               'styles'  => array(
+                                       'background' => array(
+                                               'backgroundImage' => array(
+                                                       'url' => 'http://example.org/quote.png',
+                                               ),
+                                               'backgroundSize'  => 'cover',
+                                       ),
+                                       'blocks'     => array(
+                                               'core/group' => array(
+                                                       'background' => array(
+                                                               'backgroundImage'      => array(
+                                                                       'ref' => 'styles.blocks.core/verse.background.backgroundImage',
+                                                               ),
+                                                               'backgroundAttachment' => 'fixed',
+                                                       ),
+                                               ),
+                                               'core/quote' => array(
+                                                       'background' => array(
+                                                               'backgroundImage'      => array(
+                                                                       'url' => 'http://example.org/quote.png',
+                                                               ),
+                                                               'backgroundAttachment' => array(
+                                                                       'ref' => 'styles.blocks.core/group.background.backgroundAttachment',
+                                                               ),
+                                                       ),
+                                               ),
+                                       ),
+                               ),
+                       )
+               );
+
+               $update_background_image_styles = array(
+                       'version' => WP_Theme_JSON::LATEST_SCHEMA,
+                       'styles'  => array(
+                               'background' => array(
+                                       'backgroundSize' => 'contain',
+                               ),
+                               'blocks'     => array(
+                                       'core/group' => array(
+                                               'background' => array(
+                                                       'backgroundImage' => array(
+                                                               'url' => 'http://example.org/group.png',
+                                                       ),
+                                               ),
+                                       ),
+                                       'core/quote' => array(
+                                               'background' => array(
+                                                       'backgroundAttachment' => 'fixed',
+                                               ),
+                                       ),
+                                       'core/verse' => array(
+                                               'background' => array(
+                                                       'backgroundImage' => array(
+                                                               'ref' => 'styles.blocks.core/group.background.backgroundImage',
+                                                       ),
+                                               ),
+                                       ),
+                               ),
+                       ),
+               );
+               $expected                       = array(
+                       'version' => WP_Theme_JSON::LATEST_SCHEMA,
+                       'styles'  => array(
+                               'background' => array(
+                                       'backgroundImage' => array(
+                                               'url' => 'http://example.org/quote.png',
+                                       ),
+                                       'backgroundSize'  => 'contain',
+                               ),
+                               'blocks'     => array(
+                                       'core/group' => array(
+                                               'background' => array(
+                                                       'backgroundImage'      => array(
+                                                               'url' => 'http://example.org/group.png',
+                                                       ),
+                                                       'backgroundAttachment' => 'fixed',
+                                               ),
+                                       ),
+                                       'core/quote' => array(
+                                               'background' => array(
+                                                       'backgroundImage'      => array(
+                                                               'url' => 'http://example.org/quote.png',
+                                                       ),
+                                                       'backgroundAttachment' => 'fixed',
+                                               ),
+                                       ),
+                                       'core/verse' => array(
+                                               'background' => array(
+                                                       'backgroundImage' => array(
+                                                               'ref' => 'styles.blocks.core/group.background.backgroundImage',
+                                                       ),
+                                               ),
+                                       ),
+                               ),
+                       ),
+               );
+               $theme_json->merge( new WP_Theme_JSON( $update_background_image_styles ) );
+               $actual = $theme_json->get_raw_data();
+
+               $this->assertEqualSetsWithIndex( $expected, $actual );
+       }
+
+       /**
</ins><span class="cx" style="display: block; padding: 0 10px">          * @ticket 54336
</span><span class="cx" style="display: block; padding: 0 10px">         */
</span><span class="cx" style="display: block; padding: 0 10px">        public function test_remove_insecure_properties_removes_unsafe_styles() {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -5006,12 +5115,15 @@
</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">-         * Tests that theme background image styles are correctly generated.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+  * Tests that theme background image styles are correctly generated,
+        * and that default background size of "cover" isn't
+        * applied (it's only applied to blocks).
</ins><span class="cx" style="display: block; padding: 0 10px">          *
</span><span class="cx" style="display: block; padding: 0 10px">         * @ticket 61123
</span><span class="cx" style="display: block; padding: 0 10px">         * @ticket 61165
</span><span class="cx" style="display: block; padding: 0 10px">         * @ticket 61720
</span><span class="cx" style="display: block; padding: 0 10px">         * @ticket 61704
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * @ticket 61858
</ins><span class="cx" style="display: block; padding: 0 10px">          */
</span><span class="cx" style="display: block; padding: 0 10px">        public function test_get_top_level_background_image_styles() {
</span><span class="cx" style="display: block; padding: 0 10px">                $theme_json = new WP_Theme_JSON(
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -5022,7 +5134,6 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                                'backgroundImage'      => array(
</span><span class="cx" style="display: block; padding: 0 10px">                                                        'url' => 'http://example.org/image.png',
</span><span class="cx" style="display: block; padding: 0 10px">                                                ),
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                                'backgroundSize'       => 'contain',
</del><span class="cx" style="display: block; padding: 0 10px">                                                 'backgroundRepeat'     => 'no-repeat',
</span><span class="cx" style="display: block; padding: 0 10px">                                                'backgroundPosition'   => 'center center',
</span><span class="cx" style="display: block; padding: 0 10px">                                                'backgroundAttachment' => 'fixed',
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -5036,7 +5147,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        'selector' => 'body',
</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">-                $expected_styles = "html{min-height: calc(100% - var(--wp-admin--admin-bar--height, 0px));}body{background-image: url('http://example.org/image.png');background-position: center center;background-repeat: no-repeat;background-size: contain;background-attachment: fixed;}";
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $expected_styles = "html{min-height: calc(100% - var(--wp-admin--admin-bar--height, 0px));}body{background-image: url('http://example.org/image.png');background-position: center center;background-repeat: no-repeat;background-attachment: fixed;}";
</ins><span class="cx" style="display: block; padding: 0 10px">                 $this->assertSame( $expected_styles, $theme_json->get_styles_for_block( $body_node ), 'Styles returned from "::get_stylesheet()" with top-level background styles type do not match expectations' );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $theme_json = new WP_Theme_JSON(
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -5059,8 +5170,11 @@
</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">+         * Block-level global background image styles.
+        *
</ins><span class="cx" style="display: block; padding: 0 10px">          * @ticket 61588
</span><span class="cx" style="display: block; padding: 0 10px">         * @ticket 61720
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * @ticket 61858
</ins><span class="cx" style="display: block; padding: 0 10px">          */
</span><span class="cx" style="display: block; padding: 0 10px">        public function test_get_block_background_image_styles() {
</span><span class="cx" style="display: block; padding: 0 10px">                $theme_json = new WP_Theme_JSON(
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -5071,7 +5185,6 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                                'core/group' => array(
</span><span class="cx" style="display: block; padding: 0 10px">                                                        'background' => array(
</span><span class="cx" style="display: block; padding: 0 10px">                                                                'backgroundImage'      => "url('http://example.org/group.png')",
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                                                'backgroundSize'       => 'cover',
</del><span class="cx" style="display: block; padding: 0 10px">                                                                 'backgroundRepeat'     => 'no-repeat',
</span><span class="cx" style="display: block; padding: 0 10px">                                                                'backgroundPosition'   => 'center center',
</span><span class="cx" style="display: block; padding: 0 10px">                                                                'backgroundAttachment' => 'fixed',
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -5079,19 +5192,38 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                                ),
</span><span class="cx" style="display: block; padding: 0 10px">                                                'core/quote' => array(
</span><span class="cx" style="display: block; padding: 0 10px">                                                        'background' => array(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                                                'backgroundImage'    => array(
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                                         'backgroundImage' => array(
</ins><span class="cx" style="display: block; padding: 0 10px">                                                                         'url' => 'http://example.org/quote.png',
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                                                        'id'  => 321,
</ins><span class="cx" style="display: block; padding: 0 10px">                                                                 ),
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                                                'backgroundSize'     => 'cover',
-                                                               'backgroundRepeat'   => 'no-repeat',
-                                                               'backgroundPosition' => 'center center',
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                                         'backgroundSize'  => 'contain',
</ins><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">+                                                'core/verse' => array(
+                                                       'background' => array(
+                                                               'backgroundImage' => array(
+                                                                       'url' => 'http://example.org/verse.png',
+                                                                       'id'  => 123,
+                                                               ),
+                                                       ),
+                                               ),
</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="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">+                $group_node = array(
+                       'name'      => 'core/group',
+                       'path'      => array( 'styles', 'blocks', 'core/group' ),
+                       'selector'  => '.wp-block-group',
+                       'selectors' => array(
+                               'root' => '.wp-block-group',
+                       ),
+               );
+
+               $group_styles = ":root :where(.wp-block-group){background-image: url('http://example.org/group.png');background-position: center center;background-repeat: no-repeat;background-attachment: fixed;}";
+               $this->assertSame( $group_styles, $theme_json->get_styles_for_block( $group_node ), 'Styles returned from "::get_styles_for_block()" with core/group background styles as string type do not match expectations.' );
+
</ins><span class="cx" style="display: block; padding: 0 10px">                 $quote_node = array(
</span><span class="cx" style="display: block; padding: 0 10px">                        'name'      => 'core/quote',
</span><span class="cx" style="display: block; padding: 0 10px">                        'path'      => array( 'styles', 'blocks', 'core/quote' ),
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -5101,23 +5233,79 @@
</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">-                $quote_styles = ":root :where(.wp-block-quote){background-image: url('http://example.org/quote.png');background-position: center center;background-repeat: no-repeat;background-size: cover;}";
-               $this->assertSame( $quote_styles, $theme_json->get_styles_for_block( $quote_node ), 'Styles returned from "::get_styles_for_block()" with block-level background styles do not match expectations' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $quote_styles = ":root :where(.wp-block-quote){background-image: url('http://example.org/quote.png');background-position: 50% 50%;background-size: contain;}";
+               $this->assertSame( $quote_styles, $theme_json->get_styles_for_block( $quote_node ), 'Styles returned from "::get_styles_for_block()" with core/quote default background styles do not match expectations.' );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $group_node = array(
-                       'name'      => 'core/group',
-                       'path'      => array( 'styles', 'blocks', 'core/group' ),
-                       'selector'  => '.wp-block-group',
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $verse_node = array(
+                       'name'      => 'core/verse',
+                       'path'      => array( 'styles', 'blocks', 'core/verse' ),
+                       'selector'  => '.wp-block-verse',
</ins><span class="cx" style="display: block; padding: 0 10px">                         'selectors' => array(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                'root' => '.wp-block-group',
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         'root' => '.wp-block-verse',
</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><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $group_styles = ":root :where(.wp-block-group){background-image: url('http://example.org/group.png');background-position: center center;background-repeat: no-repeat;background-size: cover;background-attachment: fixed;}";
-               $this->assertSame( $group_styles, $theme_json->get_styles_for_block( $group_node ), 'Styles returned from "::get_styles_for_block()" with block-level background styles as string type do not match expectations' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $verse_styles = ":root :where(.wp-block-verse){background-image: url('http://example.org/verse.png');background-size: cover;}";
+               $this->assertSame( $verse_styles, $theme_json->get_styles_for_block( $verse_node ), 'Styles returned from "::get_styles_for_block()" with default core/verse background styles as string type do not match expectations.' );
</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><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * Testing background dynamic properties in theme.json.
+        *
+        * @ticket 61858
+        */
+       public function test_get_resolved_background_image_styles() {
+               $theme_json = new WP_Theme_JSON(
+                       array(
+                               'version' => WP_Theme_JSON::LATEST_SCHEMA,
+                               'styles'  => array(
+                                       'background' => array(
+                                               'backgroundImage'      => array(
+                                                       'url' => 'http://example.org/top.png',
+                                               ),
+                                               'backgroundSize'       => 'contain',
+                                               'backgroundRepeat'     => 'repeat',
+                                               'backgroundPosition'   => '10% 20%',
+                                               'backgroundAttachment' => 'scroll',
+                                       ),
+                                       'blocks'     => array(
+                                               'core/group'        => array(
+                                                       'background' => array(
+                                                               'backgroundImage' => array(
+                                                                       'id'  => 123,
+                                                                       'url' => 'http://example.org/group.png',
+                                                               ),
+                                                       ),
+                                               ),
+                                               'core/post-content' => array(
+                                                       'background' => array(
+                                                               'backgroundImage'      => array(
+                                                                       'ref' => 'styles.background.backgroundImage',
+                                                               ),
+                                                               'backgroundSize'       => array(
+                                                                       'ref' => 'styles.background.backgroundSize',
+                                                               ),
+                                                               'backgroundRepeat'     => array(
+                                                                       'ref' => 'styles.background.backgroundRepeat',
+                                                               ),
+                                                               'backgroundPosition'   => array(
+                                                                       'ref' => 'styles.background.backgroundPosition',
+                                                               ),
+                                                               'backgroundAttachment' => array(
+                                                                       'ref' => 'styles.background.backgroundAttachment',
+                                                               ),
+                                                       ),
+                                               ),
+                                       ),
+                               ),
+                       )
+               );
+
+               $expected = "html{min-height: calc(100% - var(--wp-admin--admin-bar--height, 0px));}body{background-image: url('http://example.org/top.png');background-position: 10% 20%;background-repeat: repeat;background-size: contain;background-attachment: scroll;}:root :where(.wp-block-group){background-image: url('http://example.org/group.png');background-size: cover;}:root :where(.wp-block-post-content){background-image: url('http://example.org/top.png');background-position: 10% 20%;background-repeat: repeat;background-size: contain;background-attachment: scroll;}";
+               $this->assertSame( $expected, $theme_json->get_stylesheet( array( 'styles' ), null, array( 'skip_root_layout_styles' => true ) ) );
+       }
+
+       /**
</ins><span class="cx" style="display: block; padding: 0 10px">          * Tests that base custom CSS is generated correctly.
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><span class="cx" style="display: block; padding: 0 10px">         * @ticket 61395
</span></span></pre>
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