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File / Folder	Size	Action
.	-
.htaccess	0.231KB	edt ren
align.php	1.668KB	edt ren
anchor.php	1.537KB	edt ren
aria-label.php	1.651KB	edt ren
auto-register.php	2.181KB	edt ren
background.php	4.048KB	edt ren
block-style-variations.php	9.278KB	edt ren
block-visibility.php	5.228KB	edt ren
border.php	6.102KB	edt ren
colors.php	5.387KB	edt ren
custom-classname.php	1.636KB	edt ren
custom-css.php	9.369KB	edt ren
dimensions.php	5.212KB	edt ren
duotone.php	2.667KB	edt ren
elements.php	8.198KB	edt ren
generated-classname.php	1.704KB	edt ren
layout.php	42.313KB	edt ren
position.php	4.014KB	edt ren
settings.php	4.446KB	edt ren
shadow.php	2.044KB	edt ren
spacing.php	2.684KB	edt ren
typography.php	27.677KB	edt ren
utils.php	0.987KB	edt ren

<?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
 * @since 6.5.0 Added support for `backgroundPosition` and `backgroundRepeat` output.
 * @since 6.6.0 Removed requirement for `backgroundImage.source`. A file/url is the default.
 * @since 6.7.0 Added support for `backgroundAttachment` output.
 *
 * @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' ) ||
		! isset( $block_attributes['style']['background'] )
	) {
		return $block_content;
	}

$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;

if ( ! empty( $background_styles['backgroundImage'] ) ) {
		$background_styles['backgroundSize'] = $background_styles['backgroundSize'] ?? 'cover';

// If the background size is set to `contain` and no position is set, set the position to `center`.
		if ( 'contain' === $background_styles['backgroundSize'] && ! $background_styles['backgroundPosition'] ) {
			$background_styles['backgroundPosition'] = '50% 50%';
		}
	}

$styles = wp_style_engine_get_styles( array( 'background' => $background_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' );
			if ( is_string( $existing_style ) && '' !== $existing_style ) {
				$separator     = str_ends_with( $existing_style, ';' ) ? '' : ';';
				$updated_style = "{$existing_style}{$separator}{$styles['css']}";
			} else {
				$updated_style = $styles['css'];
			}

$tags->set_attribute( 'style', $updated_style );
			$tags->add_class( 'has-background' );
		}

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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