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<title>[58834] trunk: Background: add background attachment support to theme.json styles</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/58834">58834</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/58834","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>2024-07-31 02:39:46 +0000 (Wed, 31 Jul 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: add background attachment support to theme.json styles

Introduces the ability to specify a value for `background.backgroundAttachment` in theme.json styles.

The theme.json value determines the CSS value for the `background-attachment` property.

This feature was introduced into the Gutenberg plugin in version 18.9.

Props andrewserong, mukesh27, noisysocks, ramonopoly.

Fixes <a href="https://core.trac.wordpress.org/ticket/61720">#61720</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="#trunksrcwpincludesstyleengineclasswpstyleenginephp">trunk/src/wp-includes/style-engine/class-wp-style-engine.php</a></li>
<li><a href="#trunktestsphpunittestsblocksupportswpRenderBackgroundSupportphp">trunk/tests/phpunit/tests/block-supports/wpRenderBackgroundSupport.php</a></li>
<li><a href="#trunktestsphpunittestsstyleenginestyleEnginephp">trunk/tests/phpunit/tests/style-engine/styleEngine.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       2024-07-30 18:44:45 UTC (rev 58833)
+++ trunk/src/wp-includes/block-supports/background.php 2024-07-31 02:39:46 UTC (rev 58834)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -42,6 +42,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">  * @since 6.4.0
</span><span class="cx" style="display: block; padding: 0 10px">  * @since 6.5.0 Added support for `backgroundPosition` and `backgroundRepeat` output.
</span><span class="cx" style="display: block; padding: 0 10px">  * @since 6.6.0 Removed requirement for `backgroundImage.source`. A file/url is the default.
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * @since 6.7.0 Added support for `backgroundAttachment` output.
</ins><span class="cx" style="display: block; padding: 0 10px">  *
</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="lines" style="display: block; padding: 0 10px; color: #888">@@ -62,11 +63,12 @@
</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">-        $background_styles                       = array();
-       $background_styles['backgroundImage']    = $block_attributes['style']['background']['backgroundImage'] ?? null;
-       $background_styles['backgroundSize']     = $block_attributes['style']['background']['backgroundSize'] ?? null;
-       $background_styles['backgroundPosition'] = $block_attributes['style']['background']['backgroundPosition'] ?? null;
-       $background_styles['backgroundRepeat']   = $block_attributes['style']['background']['backgroundRepeat'] ?? null;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $background_styles                         = array();
+       $background_styles['backgroundImage']      = $block_attributes['style']['background']['backgroundImage'] ?? null;
+       $background_styles['backgroundSize']       = $block_attributes['style']['background']['backgroundSize'] ?? null;
+       $background_styles['backgroundPosition']   = $block_attributes['style']['background']['backgroundPosition'] ?? null;
+       $background_styles['backgroundRepeat']     = $block_attributes['style']['background']['backgroundRepeat'] ?? null;
+       $background_styles['backgroundAttachment'] = $block_attributes['style']['background']['backgroundAttachment'] ?? null;
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        if ( ! empty( $background_styles['backgroundImage'] ) ) {
</span><span class="cx" style="display: block; padding: 0 10px">                $background_styles['backgroundSize'] = $background_styles['backgroundSize'] ?? 'cover';
</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     2024-07-30 18:44:45 UTC (rev 58833)
+++ trunk/src/wp-includes/class-wp-theme-json.php       2024-07-31 02:39:46 UTC (rev 58834)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -226,6 +226,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">         * @since 6.4.0 Added `writing-mode` property.
</span><span class="cx" style="display: block; padding: 0 10px">         * @since 6.5.0 Added `aspect-ratio` property.
</span><span class="cx" style="display: block; padding: 0 10px">         * @since 6.6.0 Added `background-[image|position|repeat|size]` properties.
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * @since 6.7.0 Added `background-attachment` property.
</ins><span class="cx" style="display: block; padding: 0 10px">          *
</span><span class="cx" style="display: block; padding: 0 10px">         * @var array
</span><span class="cx" style="display: block; padding: 0 10px">         */
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -237,6 +238,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                'background-position'               => array( 'background', 'backgroundPosition' ),
</span><span class="cx" style="display: block; padding: 0 10px">                'background-repeat'                 => array( 'background', 'backgroundRepeat' ),
</span><span class="cx" style="display: block; padding: 0 10px">                'background-size'                   => array( 'background', 'backgroundSize' ),
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                'background-attachment'             => array( 'background', 'backgroundAttachment' ),
</ins><span class="cx" style="display: block; padding: 0 10px">                 'border-radius'                     => array( 'border', 'radius' ),
</span><span class="cx" style="display: block; padding: 0 10px">                'border-top-left-radius'            => array( 'border', 'radius', 'topLeft' ),
</span><span class="cx" style="display: block; padding: 0 10px">                'border-top-right-radius'           => array( 'border', 'radius', 'topRight' ),
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -520,10 +522,11 @@
</span><span class="cx" style="display: block; padding: 0 10px">         */
</span><span class="cx" style="display: block; padding: 0 10px">        const VALID_STYLES = 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'    => null,
-                       'backgroundPosition' => null,
-                       'backgroundRepeat'   => null,
-                       'backgroundSize'     => null,
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 'backgroundImage'      => null,
+                       'backgroundPosition'   => null,
+                       'backgroundRepeat'     => null,
+                       'backgroundSize'       => null,
+                       'backgroundAttachment' => null,
</ins><span class="cx" style="display: block; padding: 0 10px">                 ),
</span><span class="cx" style="display: block; padding: 0 10px">                'border'     => array(
</span><span class="cx" style="display: block; padding: 0 10px">                        'color'  => null,
</span></span></pre></div>
<a id="trunksrcwpincludesstyleengineclasswpstyleenginephp"></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/style-engine/class-wp-style-engine.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/style-engine/class-wp-style-engine.php      2024-07-30 18:44:45 UTC (rev 58833)
+++ trunk/src/wp-includes/style-engine/class-wp-style-engine.php        2024-07-31 02:39:46 UTC (rev 58834)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -50,7 +50,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">         */
</span><span class="cx" style="display: block; padding: 0 10px">        const BLOCK_STYLE_DEFINITIONS_METADATA = 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">                                 'property_keys' => array(
</span><span class="cx" style="display: block; padding: 0 10px">                                        'default' => 'background-image',
</span><span class="cx" style="display: block; padding: 0 10px">                                ),
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -57,24 +57,30 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                'value_func'    => array( self::class, 'get_url_or_value_css_declaration' ),
</span><span class="cx" style="display: block; padding: 0 10px">                                'path'          => array( 'background', 'backgroundImage' ),
</span><span class="cx" style="display: block; padding: 0 10px">                        ),
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        'backgroundPosition' => array(
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 'backgroundPosition'   => array(
</ins><span class="cx" style="display: block; padding: 0 10px">                                 'property_keys' => array(
</span><span class="cx" style="display: block; padding: 0 10px">                                        'default' => 'background-position',
</span><span class="cx" style="display: block; padding: 0 10px">                                ),
</span><span class="cx" style="display: block; padding: 0 10px">                                'path'          => array( 'background', 'backgroundPosition' ),
</span><span class="cx" style="display: block; padding: 0 10px">                        ),
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        'backgroundRepeat'   => array(
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 'backgroundRepeat'     => array(
</ins><span class="cx" style="display: block; padding: 0 10px">                                 'property_keys' => array(
</span><span class="cx" style="display: block; padding: 0 10px">                                        'default' => 'background-repeat',
</span><span class="cx" style="display: block; padding: 0 10px">                                ),
</span><span class="cx" style="display: block; padding: 0 10px">                                'path'          => array( 'background', 'backgroundRepeat' ),
</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'     => array(
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 'backgroundSize'       => array(
</ins><span class="cx" style="display: block; padding: 0 10px">                                 'property_keys' => array(
</span><span class="cx" style="display: block; padding: 0 10px">                                        'default' => 'background-size',
</span><span class="cx" style="display: block; padding: 0 10px">                                ),
</span><span class="cx" style="display: block; padding: 0 10px">                                'path'          => array( 'background', 'backgroundSize' ),
</span><span class="cx" style="display: block; padding: 0 10px">                        ),
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        'backgroundAttachment' => array(
+                               'property_keys' => array(
+                                       'default' => 'background-attachment',
+                               ),
+                               'path'          => array( 'background', 'backgroundAttachment' ),
+                       ),
</ins><span class="cx" style="display: block; padding: 0 10px">                 ),
</span><span class="cx" style="display: block; padding: 0 10px">                'color'      => array(
</span><span class="cx" style="display: block; padding: 0 10px">                        'text'       => array(
</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    2024-07-30 18:44:45 UTC (rev 58833)
+++ trunk/tests/phpunit/tests/block-supports/wpRenderBackgroundSupport.php      2024-07-31 02:39:46 UTC (rev 58834)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -69,6 +69,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">         * @ticket 59357
</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><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * @ticket 61720
</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">@@ -139,7 +140,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                'expected_wrapper'    => '<div class="has-background" style="background-image:url(&#039;https://example.com/image.jpg&#039;);background-size:cover;">Content</div>',
</span><span class="cx" style="display: block; padding: 0 10px">                                'wrapper'             => '<div>Content</div>',
</span><span class="cx" style="display: block; padding: 0 10px">                        ),
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        'background image style with contain, position, and repeat is applied' => array(
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 'background image style with contain, position, attachment, and repeat is applied' => array(
</ins><span class="cx" style="display: block; padding: 0 10px">                                 'theme_name'          => 'block-theme-child-with-fluid-typography',
</span><span class="cx" style="display: block; padding: 0 10px">                                'block_name'          => 'test/background-rules-are-output',
</span><span class="cx" style="display: block; padding: 0 10px">                                'background_settings' => array(
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -146,13 +147,14 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                        'backgroundImage' => true,
</span><span class="cx" style="display: block; padding: 0 10px">                                ),
</span><span class="cx" style="display: block; padding: 0 10px">                                'background_style'    => 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' => 'https://example.com/image.jpg',
</span><span class="cx" style="display: block; padding: 0 10px">                                        ),
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        'backgroundRepeat' => 'no-repeat',
-                                       'backgroundSize'   => 'contain',
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 'backgroundRepeat'     => 'no-repeat',
+                                       'backgroundSize'       => 'contain',
+                                       'backgroundAttachment' => 'fixed',
</ins><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;">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:center;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="trunktestsphpunittestsstyleenginestyleEnginephp"></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/style-engine/styleEngine.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/style-engine/styleEngine.php    2024-07-30 18:44:45 UTC (rev 58833)
+++ trunk/tests/phpunit/tests/style-engine/styleEngine.php      2024-07-31 02:39:46 UTC (rev 58834)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -28,6 +28,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">         * @ticket 58549
</span><span class="cx" style="display: block; padding: 0 10px">         * @ticket 58590
</span><span class="cx" style="display: block; padding: 0 10px">         * @ticket 60175
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * @ticket 61720
</ins><span class="cx" style="display: block; padding: 0 10px">          *
</span><span class="cx" style="display: block; padding: 0 10px">         * @covers ::wp_style_engine_get_styles
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -539,22 +540,24 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        'inline_background_image_url_with_background_size' => array(
</span><span class="cx" style="display: block; padding: 0 10px">                                'block_styles'    => 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' => 'https://example.com/image.jpg',
</span><span class="cx" style="display: block; padding: 0 10px">                                                ),
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                                'backgroundPosition' => 'center',
-                                               'backgroundRepeat'   => 'no-repeat',
-                                               'backgroundSize'     => 'cover',
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                         'backgroundPosition'   => 'center',
+                                               'backgroundRepeat'     => 'no-repeat',
+                                               'backgroundSize'       => 'cover',
+                                               'backgroundAttachment' => 'fixed',
</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">                                'options'         => array(),
</span><span class="cx" style="display: block; padding: 0 10px">                                'expected_output' => array(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        'css'          => "background-image:url('https://example.com/image.jpg');background-position:center;background-repeat:no-repeat;background-size:cover;",
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 'css'          => "background-image:url('https://example.com/image.jpg');background-position:center;background-repeat:no-repeat;background-size:cover;background-attachment:fixed;",
</ins><span class="cx" style="display: block; padding: 0 10px">                                         'declarations' => array(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                                'background-image'    => "url('https://example.com/image.jpg')",
-                                               'background-position' => 'center',
-                                               'background-repeat'   => 'no-repeat',
-                                               'background-size'     => 'cover',
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                         'background-image'      => "url('https://example.com/image.jpg')",
+                                               'background-position'   => 'center',
+                                               'background-repeat'     => 'no-repeat',
+                                               'background-size'       => 'cover',
+                                               'background-attachment' => 'fixed',
</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="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   2024-07-30 18:44:45 UTC (rev 58833)
+++ trunk/tests/phpunit/tests/theme/wpThemeJson.php     2024-07-31 02:39:46 UTC (rev 58834)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -4997,6 +4997,7 @@
</span><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><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * @ticket 61720
</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">@@ -5004,12 +5005,13 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                'version' => WP_Theme_JSON::LATEST_SCHEMA,
</span><span class="cx" style="display: block; padding: 0 10px">                                'styles'  => 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/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',
-                                               'backgroundRepeat'   => 'no-repeat',
-                                               'backgroundPosition' => 'center center',
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                         'backgroundSize'       => 'contain',
+                                               'backgroundRepeat'     => 'no-repeat',
+                                               'backgroundPosition'   => 'center center',
+                                               'backgroundAttachment' => 'fixed',
</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">@@ -5020,7 +5022,7 @@
</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));}:root :where(body){background-image: url('http://example.org/image.png');background-position: center center;background-repeat: no-repeat;background-size: contain;}";
</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));}:root :where(body){background-image: url('http://example.org/image.png');background-position: center center;background-repeat: no-repeat;background-size: contain;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">@@ -5028,21 +5030,22 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                'version' => WP_Theme_JSON::LATEST_SCHEMA,
</span><span class="cx" style="display: block; padding: 0 10px">                                'styles'  => 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'    => "url('http://example.org/image.png')",
-                                               'backgroundSize'     => 'contain',
-                                               'backgroundRepeat'   => 'no-repeat',
-                                               'backgroundPosition' => 'center center',
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                         'backgroundImage'      => "url('http://example.org/image.png')",
+                                               'backgroundSize'       => 'contain',
+                                               'backgroundRepeat'     => 'no-repeat',
+                                               'backgroundPosition'   => 'center center',
+                                               'backgroundAttachment' => 'fixed',
</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><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));}:root :where(body){background-image: url('http://example.org/image.png');background-position: center center;background-repeat: no-repeat;background-size: contain;}";
</del><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 image as string 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"> 
</span><span class="cx" style="display: block; padding: 0 10px">        /**
</span><span class="cx" style="display: block; padding: 0 10px">         * @ticket 61588
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * @ticket 61720
</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">@@ -5052,10 +5055,11 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                        'blocks' => array(
</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><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                                                'backgroundImage'    => "url('http://example.org/group.png')",
-                                                               'backgroundSize'     => 'cover',
-                                                               'backgroundRepeat'   => 'no-repeat',
-                                                               'backgroundPosition' => 'center center',
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                                         'backgroundImage'      => "url('http://example.org/group.png')",
+                                                               'backgroundSize'       => 'cover',
+                                                               'backgroundRepeat'     => 'no-repeat',
+                                                               'backgroundPosition'   => 'center center',
+                                                               'backgroundAttachment' => 'fixed',
</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">                                                'core/quote' => array(
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -5094,7 +5098,7 @@
</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"> 
</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;}";
</del><ins style="background-color: #dfd; 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;}";
</ins><span class="cx" style="display: block; padding: 0 10px">                 $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' );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span></span></pre>
</div>
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