From a415c29efee45520ae252d2aa28f1083a521cd7b Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 09:56:49 +0200
Subject: Adding upstream version 6.4.3+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 wp-includes/block-supports/background.php | 118 ++++++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 wp-includes/block-supports/background.php

(limited to 'wp-includes/block-supports/background.php')

diff --git a/wp-includes/block-supports/background.php b/wp-includes/block-supports/background.php
new file mode 100644
index 0000000..a8de0c6
--- /dev/null
+++ b/wp-includes/block-supports/background.php
@@ -0,0 +1,118 @@
+<?php
+/**
+ * Background block support flag.
+ *
+ * @package WordPress
+ * @since 6.4.0
+ */
+
+/**
+ * Registers the style block attribute for block types that support it.
+ *
+ * @since 6.4.0
+ * @access private
+ *
+ * @param WP_Block_Type $block_type Block Type.
+ */
+function wp_register_background_support( $block_type ) {
+	// Setup attributes and styles within that if needed.
+	if ( ! $block_type->attributes ) {
+		$block_type->attributes = array();
+	}
+
+	// Check for existing style attribute definition e.g. from block.json.
+	if ( array_key_exists( 'style', $block_type->attributes ) ) {
+		return;
+	}
+
+	$has_background_support = block_has_support( $block_type, array( 'background' ), false );
+
+	if ( $has_background_support ) {
+		$block_type->attributes['style'] = array(
+			'type' => 'object',
+		);
+	}
+}
+
+/**
+ * Renders the background styles to the block wrapper.
+ * This block support uses the `render_block` hook to ensure that
+ * it is also applied to non-server-rendered blocks.
+ *
+ * @since 6.4.0
+ * @access private
+ *
+ * @param  string $block_content Rendered block content.
+ * @param  array  $block         Block object.
+ * @return string Filtered block content.
+ */
+function wp_render_background_support( $block_content, $block ) {
+	$block_type                   = WP_Block_Type_Registry::get_instance()->get_registered( $block['blockName'] );
+	$block_attributes             = ( isset( $block['attrs'] ) && is_array( $block['attrs'] ) ) ? $block['attrs'] : array();
+	$has_background_image_support = block_has_support( $block_type, array( 'background', 'backgroundImage' ), false );
+
+	if (
+		! $has_background_image_support ||
+		wp_should_skip_block_supports_serialization( $block_type, 'background', 'backgroundImage' )
+	) {
+		return $block_content;
+	}
+
+	$background_image_source = isset( $block_attributes['style']['background']['backgroundImage']['source'] )
+		? $block_attributes['style']['background']['backgroundImage']['source']
+		: null;
+	$background_image_url    = isset( $block_attributes['style']['background']['backgroundImage']['url'] )
+		? $block_attributes['style']['background']['backgroundImage']['url']
+		: null;
+	$background_size         = isset( $block_attributes['style']['background']['backgroundSize'] )
+		? $block_attributes['style']['background']['backgroundSize']
+		: 'cover';
+
+	$background_block_styles = array();
+
+	if (
+		'file' === $background_image_source &&
+		$background_image_url
+	) {
+		// Set file based background URL.
+		$background_block_styles['backgroundImage']['url'] = $background_image_url;
+		// Only output the background size when an image url is set.
+		$background_block_styles['backgroundSize'] = $background_size;
+	}
+
+	$styles = wp_style_engine_get_styles( array( 'background' => $background_block_styles ) );
+
+	if ( ! empty( $styles['css'] ) ) {
+		// Inject background styles to the first element, presuming it's the wrapper, if it exists.
+		$tags = new WP_HTML_Tag_Processor( $block_content );
+
+		if ( $tags->next_tag() ) {
+			$existing_style = $tags->get_attribute( 'style' );
+			$updated_style  = '';
+
+			if ( ! empty( $existing_style ) ) {
+				$updated_style = $existing_style;
+				if ( ! str_ends_with( $existing_style, ';' ) ) {
+					$updated_style .= ';';
+				}
+			}
+
+			$updated_style .= $styles['css'];
+			$tags->set_attribute( 'style', $updated_style );
+		}
+
+		return $tags->get_updated_html();
+	}
+
+	return $block_content;
+}
+
+// Register the block support.
+WP_Block_Supports::get_instance()->register(
+	'background',
+	array(
+		'register_attribute' => 'wp_register_background_support',
+	)
+);
+
+add_filter( 'render_block', 'wp_render_background_support', 10, 2 );
-- 
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