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<?php
/**
 * Server-side rendering of the `core/gallery` block.
 *
 * @package WordPress
 */

/**
 * Handles backwards compatibility for Gallery Blocks,
 * whose images feature a `data-id` attribute.
 *
 * Now that the Gallery Block contains inner Image Blocks,
 * we add a custom `data-id` attribute before rendering the gallery
 * so that the Image Block can pick it up in its render_callback.
 *
 * @since 5.9.0
 *
 * @param array $parsed_block The block being rendered.
 * @return array The migrated block object.
 */
function block_core_gallery_data_id_backcompatibility( $parsed_block ) {
	if ( 'core/gallery' === $parsed_block['blockName'] ) {
		foreach ( $parsed_block['innerBlocks'] as $key => $inner_block ) {
			if ( 'core/image' === $inner_block['blockName'] ) {
				if ( ! isset( $parsed_block['innerBlocks'][ $key ]['attrs']['data-id'] ) && isset( $inner_block['attrs']['id'] ) ) {
					$parsed_block['innerBlocks'][ $key ]['attrs']['data-id'] = esc_attr( $inner_block['attrs']['id'] );
				}
			}
		}
	}

return $parsed_block;
}

add_filter( 'render_block_data', 'block_core_gallery_data_id_backcompatibility' );

/**
 * Renders the `core/gallery` block on the server.
 *
 * @since 6.0.0
 *
 * @param array  $attributes Attributes of the block being rendered.
 * @param string $content Content of the block being rendered.
 * @return string The content of the block being rendered.
 */
function block_core_gallery_render( $attributes, $content ) {
	// Adds a style tag for the --wp--style--unstable-gallery-gap var.
	// The Gallery block needs to recalculate Image block width based on
	// the current gap setting in order to maintain the number of flex columns
	// so a css var is added to allow this.

$gap = $attributes['style']['spacing']['blockGap'] ?? null;
	// Skip if gap value contains unsupported characters.
	// Regex for CSS value borrowed from `safecss_filter_attr`, and used here
	// because we only want to match against the value, not the CSS attribute.
	if ( is_array( $gap ) ) {
		foreach ( $gap as $key => $value ) {
			// Make sure $value is a string to avoid PHP 8.1 deprecation error in preg_match() when the value is null.
			$value = is_string( $value ) ? $value : '';
			$value = $value && preg_match( '%[\\\(&=}]|/\*%', $value ) ? null : $value;

// Get spacing CSS variable from preset value if provided.
			if ( is_string( $value ) && str_contains( $value, 'var:preset|spacing|' ) ) {
				$index_to_splice = strrpos( $value, '|' ) + 1;
				$slug            = _wp_to_kebab_case( substr( $value, $index_to_splice ) );
				$value           = "var(--wp--preset--spacing--$slug)";
			}

$gap[ $key ] = $value;
		}
	} else {
		// Make sure $gap is a string to avoid PHP 8.1 deprecation error in preg_match() when the value is null.
		$gap = is_string( $gap ) ? $gap : '';
		$gap = $gap && preg_match( '%[\\\(&=}]|/\*%', $gap ) ? null : $gap;

// Get spacing CSS variable from preset value if provided.
		if ( is_string( $gap ) && str_contains( $gap, 'var:preset|spacing|' ) ) {
			$index_to_splice = strrpos( $gap, '|' ) + 1;
			$slug            = _wp_to_kebab_case( substr( $gap, $index_to_splice ) );
			$gap             = "var(--wp--preset--spacing--$slug)";
		}
	}

$unique_gallery_classname = wp_unique_id( 'wp-block-gallery-' );
	$processed_content        = new WP_HTML_Tag_Processor( $content );
	$processed_content->next_tag();
	$processed_content->add_class( $unique_gallery_classname );

// --gallery-block--gutter-size is deprecated. --wp--style--gallery-gap-default should be used by themes that want to set a default
	// gap on the gallery.
	$fallback_gap = 'var( --wp--style--gallery-gap-default, var( --gallery-block--gutter-size, var( --wp--style--block-gap, 0.5em ) ) )';
	$gap_value    = $gap ? $gap : $fallback_gap;
	$gap_column   = $gap_value;

if ( is_array( $gap_value ) ) {
		$gap_row    = isset( $gap_value['top'] ) ? $gap_value['top'] : $fallback_gap;
		$gap_column = isset( $gap_value['left'] ) ? $gap_value['left'] : $fallback_gap;
		$gap_value  = $gap_row === $gap_column ? $gap_row : $gap_row . ' ' . $gap_column;
	}

// The unstable gallery gap calculation requires a real value (such as `0px`) and not `0`.
	if ( '0' === $gap_column ) {
		$gap_column = '0px';
	}

// Set the CSS variable to the column value, and the `gap` property to the combined gap value.
	$gallery_styles = array(
		array(
			'selector'     => ".wp-block-gallery.{$unique_gallery_classname}",
			'declarations' => array(
				'--wp--style--unstable-gallery-gap' => $gap_column,
				'gap'                               => $gap_value,
			),
		),
	);

wp_style_engine_get_stylesheet_from_css_rules(
		$gallery_styles,
		array(
			'context' => 'block-supports',
		)
	);

// The WP_HTML_Tag_Processor class calls get_updated_html() internally
	// when the instance is treated as a string, but here we explicitly
	// convert it to a string.
	$updated_content = $processed_content->get_updated_html();

/*
	 * Randomize the order of image blocks. Ideally we should shuffle
	 * the `$parsed_block['innerBlocks']` via the `render_block_data` hook.
	 * However, this hook doesn't apply inner block updates when blocks are
	 * nested.
	 * @todo In the future, if this hook supports updating innerBlocks in
	 * nested blocks, it should be refactored.
	 *
	 * @see: https://github.com/WordPress/gutenberg/pull/58733
	 */
	if ( empty( $attributes['randomOrder'] ) ) {
		return $updated_content;
	}

// This pattern matches figure elements with the `wp-block-image` class to
	// avoid the gallery's wrapping `figure` element and extract images only.
	$pattern = '/<figure[^>]*\bwp-block-image\b[^>]*>.*?<\/figure>/';

// Find all Image blocks.
	preg_match_all( $pattern, $updated_content, $matches );
	if ( ! $matches ) {
		return $updated_content;
	}
	$image_blocks = $matches[0];

// Randomize the order of Image blocks.
	shuffle( $image_blocks );
	$i       = 0;
	$content = preg_replace_callback(
		$pattern,
		static function () use ( $image_blocks, &$i ) {
			$new_image_block = $image_blocks[ $i ];
			++$i;
			return $new_image_block;
		},
		$updated_content
	);

return $content;
}
/**
 * Registers the `core/gallery` block on server.
 *
 * @since 5.9.0
 */
function register_block_core_gallery() {
	register_block_type_from_metadata(
		__DIR__ . '/gallery',
		array(
			'render_callback' => 'block_core_gallery_render',
		)
	);
}

add_action( 'init', 'register_block_core_gallery' );

Nama File / Folder	Size	Action
archives	--	NONE
audio	--	NONE
avatar	--	NONE
block	--	NONE
button	--	NONE
buttons	--	NONE
calendar	--	NONE
categories	--	NONE
code	--	NONE
column	--	NONE
columns	--	NONE
comment-author-name	--	NONE
comment-content	--	NONE
comment-date	--	NONE
comment-edit-link	--	NONE
comment-reply-link	--	NONE
comment-template	--	NONE
comments	--	NONE
comments-pagination	--	NONE
comments-pagination-next	--	NONE
comments-pagination-numbers	--	NONE
comments-pagination-previous	--	NONE
comments-title	--	NONE
cover	--	NONE
details	--	NONE
embed	--	NONE
file	--	NONE
footnotes	--	NONE
freeform	--	NONE
gallery	--	NONE
group	--	NONE
heading	--	NONE
home-link	--	NONE
html	--	NONE
image	--	NONE
latest-comments	--	NONE
latest-posts	--	NONE
legacy-widget	--	NONE
list	--	NONE
list-item	--	NONE
loginout	--	NONE
media-text	--	NONE
missing	--	NONE
more	--	NONE
navigation	--	NONE
navigation-link	--	NONE
navigation-submenu	--	NONE
nextpage	--	NONE
page-list	--	NONE
page-list-item	--	NONE
paragraph	--	NONE
pattern	--	NONE
post-author	--	NONE
post-author-biography	--	NONE
post-author-name	--	NONE
post-comments-form	--	NONE
post-content	--	NONE
post-date	--	NONE
post-excerpt	--	NONE
post-featured-image	--	NONE
post-navigation-link	--	NONE
post-template	--	NONE
post-terms	--	NONE
post-title	--	NONE
preformatted	--	NONE
pullquote	--	NONE
query	--	NONE
query-no-results	--	NONE
query-pagination	--	NONE
query-pagination-next	--	NONE
query-pagination-numbers	--	NONE
query-pagination-previous	--	NONE
query-title	--	NONE
query-total	--	NONE
quote	--	NONE
read-more	--	NONE
rss	--	NONE
search	--	NONE
separator	--	NONE
shortcode	--	NONE
site-logo	--	NONE
site-tagline	--	NONE
site-title	--	NONE
social-link	--	NONE
social-links	--	NONE
spacer	--	NONE
table	--	NONE
tag-cloud	--	NONE
template-part	--	NONE
term-description	--	NONE
text-columns	--	NONE
verse	--	NONE
video	--	NONE
widget-group	--	NONE
.htaccess	0.231KB	Edit File Delete File Rename
archives.php	2.924KB	Edit File Delete File Rename
block.php	3.236KB	Edit File Delete File Rename
blocks-json.php	189.399KB	Edit File Delete File Rename
button.php	1.763KB	Edit File Delete File Rename
categories.php	3.916KB	Edit File Delete File Rename
comment-author-name.php	2.083KB	Edit File Delete File Rename
comment-content.php	2.401KB	Edit File Delete File Rename
comment-date.php	1.819KB	Edit File Delete File Rename
comment-edit-link.php	1.673KB	Edit File Delete File Rename
comment-reply-link.php	2.026KB	Edit File Delete File Rename
comment-template.php	4.389KB	Edit File Delete File Rename
comments-pagination-next.php	1.879KB	Edit File Delete File Rename
comments-pagination-numbers.php	1.594KB	Edit File Delete File Rename
comments-pagination-previous.php	1.748KB	Edit File Delete File Rename
comments-pagination.php	1.171KB	Edit File Delete File Rename
comments-title.php	2.707KB	Edit File Delete File Rename
comments.php	6.608KB	Edit File Delete File Rename
cover.php	3.101KB	Edit File Delete File Rename
error_log	49.91KB	Edit File Delete File Rename
file.php	1.751KB	Edit File Delete File Rename
footnotes.php	3.683KB	Edit File Delete File Rename
gallery.php	6.287KB	Edit File Delete File Rename
heading.php	1.271KB	Edit File Delete File Rename
home-link.php	5.311KB	Edit File Delete File Rename
image.php	11.741KB	Edit File Delete File Rename
latest-comments.php	4.922KB	Edit File Delete File Rename
latest-posts.php	8.342KB	Edit File Delete File Rename
legacy-widget.php	3.903KB	Edit File Delete File Rename
loginout.php	1.385KB	Edit File Delete File Rename
media-text.php	4.28KB	Edit File Delete File Rename
navigation-link.php	13.587KB	Edit File Delete File Rename
navigation-submenu.php	9.71KB	Edit File Delete File Rename
navigation.php	48.457KB	Edit File Delete File Rename
page-list.php	13.292KB	Edit File Delete File Rename
pattern.php	1.746KB	Edit File Delete File Rename
post-author-biography.php	1.488KB	Edit File Delete File Rename
post-comments-form.php	2.739KB	Edit File Delete File Rename
post-content.php	2.105KB	Edit File Delete File Rename
post-date.php	3.051KB	Edit File Delete File Rename
post-excerpt.php	3.366KB	Edit File Delete File Rename
post-featured-image.php	9.144KB	Edit File Delete File Rename
post-navigation-link.php	4.724KB	Edit File Delete File Rename
post-template.php	5.614KB	Edit File Delete File Rename
post-terms.php	3.555KB	Edit File Delete File Rename
post-title.php	2.088KB	Edit File Delete File Rename
query-no-results.php	1.804KB	Edit File Delete File Rename
query-pagination-next.php	3.698KB	Edit File Delete File Rename
query-pagination-numbers.php	4.658KB	Edit File Delete File Rename
query-pagination-previous.php	3.5KB	Edit File Delete File Rename
query-pagination.php	1.148KB	Edit File Delete File Rename
query-title.php	2.049KB	Edit File Delete File Rename
query-total.php	2.476KB	Edit File Delete File Rename
query.php	5.557KB	Edit File Delete File Rename
read-more.php	1.787KB	Edit File Delete File Rename
require-dynamic-blocks.php	4.065KB	Edit File Delete File Rename
require-static-blocks.php	0.489KB	Edit File Delete File Rename
rss.php	3.978KB	Edit File Delete File Rename
shortcode.php	0.718KB	Edit File Delete File Rename
site-tagline.php	1.175KB	Edit File Delete File Rename
site-title.php	1.81KB	Edit File Delete File Rename
social-link.php	63.646KB	Edit File Delete File Rename
tag-cloud.php	1.553KB	Edit File Delete File Rename
template-part.php	9.916KB	Edit File Delete File Rename
term-description.php	1.305KB	Edit File Delete File Rename
widget-group.php	2.381KB	Edit File Delete File Rename