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<?php |
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/** |
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* Server-side rendering of the `core/gallery` block. |
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* |
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* @package WordPress |
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*/ |
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|
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/** |
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* Handles backwards compatibility for Gallery Blocks, |
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* whose images feature a `data-id` attribute. |
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* |
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* Now that the Gallery Block contains inner Image Blocks, |
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* we add a custom `data-id` attribute before rendering the gallery |
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* so that the Image Block can pick it up in its render_callback. |
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* |
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* @param array $parsed_block The block being rendered. |
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* @return array The migrated block object. |
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*/ |
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function gutenberg_block_core_gallery_data_id_backcompatibility( $parsed_block ) { |
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if ( 'core/gallery' === $parsed_block['blockName'] ) { |
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foreach ( $parsed_block['innerBlocks'] as $key => $inner_block ) { |
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if ( 'core/image' === $inner_block['blockName'] ) { |
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if ( ! isset( $parsed_block['innerBlocks'][ $key ]['attrs']['data-id'] ) && isset( $inner_block['attrs']['id'] ) ) { |
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$parsed_block['innerBlocks'][ $key ]['attrs']['data-id'] = esc_attr( $inner_block['attrs']['id'] ); |
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} |
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} |
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} |
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} |
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|
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return $parsed_block; |
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} |
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|
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add_filter( 'render_block_data', 'gutenberg_block_core_gallery_data_id_backcompatibility' ); |
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|
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/** |
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* Adds a style tag for the --wp--style--unstable-gallery-gap var. |
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* |
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* The Gallery block needs to recalculate Image block width based on |
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* the current gap setting in order to maintain the number of flex columns |
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* so a css var is added to allow this. |
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* |
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* @param array $attributes Attributes of the block being rendered. |
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* @param string $content Content of the block being rendered. |
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* @return string The content of the block being rendered. |
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*/ |
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function gutenberg_block_core_gallery_render( $attributes, $content ) { |
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$gap = _wp_array_get( $attributes, array( 'style', 'spacing', 'blockGap' ) ); |
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// Skip if gap value contains unsupported characters. |
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// Regex for CSS value borrowed from `safecss_filter_attr`, and used here |
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// because we only want to match against the value, not the CSS attribute. |
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if ( is_array( $gap ) ) { |
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foreach ( $gap as $key => $value ) { |
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$gap[ $key ] = $value && preg_match( '%[\\\(&=}]|/\*%', $value ) ? null : $value; |
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} |
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} else { |
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$gap = $gap && preg_match( '%[\\\(&=}]|/\*%', $gap ) ? null : $gap; |
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} |
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|
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$class = wp_unique_id( 'wp-block-gallery-' ); |
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$content = preg_replace( |
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'/' . preg_quote( 'class="', '/' ) . '/', |
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'class="' . $class . ' ', |
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$content, |
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1 |
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); |
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|
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// --gallery-block--gutter-size is deprecated. --wp--style--gallery-gap-default should be used by themes that want to set a default |
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// gap on the gallery. |
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$fallback_gap = 'var( --wp--style--gallery-gap-default, var( --gallery-block--gutter-size, var( --wp--style--block-gap, 0.5em ) ) )'; |
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$gap_value = $gap ? $gap : $fallback_gap; |
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$gap_column = $gap_value; |
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|
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if ( is_array( $gap_value ) ) { |
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$gap_row = isset( $gap_value['top'] ) ? $gap_value['top'] : $fallback_gap; |
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$gap_column = isset( $gap_value['left'] ) ? $gap_value['left'] : $fallback_gap; |
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$gap_value = $gap_row === $gap_column ? $gap_row : $gap_row . ' ' . $gap_column; |
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} |
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|
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// Set the CSS variable to the column value, and the `gap` property to the combined gap value. |
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$style = '.' . $class . '{ --wp--style--unstable-gallery-gap: ' . $gap_column . '; gap: ' . $gap_value . '}'; |
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|
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gutenberg_enqueue_block_support_styles( $style, 11 ); |
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return $content; |
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} |
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/** |
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* Registers the `core/gallery` block on server. |
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*/ |
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function gutenberg_register_block_core_gallery() { |
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register_block_type_from_metadata( |
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__DIR__ . '/gallery', |
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array( |
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'render_callback' => 'gutenberg_block_core_gallery_render', |
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) |
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); |
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} |
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|
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add_action( 'init', 'gutenberg_register_block_core_gallery', 20 ); |
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|
