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- <?php
- /**
- * Server-side rendering of the `core/file` block.
- *
- * @package WordPress
- */
- /**
- * When the `core/file` block is rendering, check if we need to enqueue the `'wp-block-file-view` script.
- *
- * @param array $attributes The block attributes.
- * @param string $content The block content.
- *
- * @return string Returns the block content.
- */
- function render_block_core_file( $attributes, $content ) {
- $should_load_view_script = ! empty( $attributes['displayPreview'] ) && ! wp_script_is( 'wp-block-file-view' );
- if ( $should_load_view_script ) {
- wp_enqueue_script( 'wp-block-file-view' );
- }
- // Update object's aria-label attribute if present in block HTML.
- // Match an aria-label attribute from an object tag.
- $pattern = '@<object.+(?<attribute>aria-label="(?<filename>[^"]+)?")@i';
- $content = preg_replace_callback(
- $pattern,
- function ( $matches ) {
- $filename = ! empty( $matches['filename'] ) ? $matches['filename'] : '';
- $has_filename = ! empty( $filename ) && 'PDF embed' !== $filename;
- $label = $has_filename ?
- sprintf(
- /* translators: %s: filename. */
- __( 'Embed of %s.' ),
- $filename
- )
- : __( 'PDF embed' );
- return str_replace( $matches['attribute'], sprintf( 'aria-label="%s"', $label ), $matches[0] );
- },
- $content
- );
- return $content;
- }
- /**
- * Registers the `core/file` block on server.
- */
- function register_block_core_file() {
- register_block_type_from_metadata(
- __DIR__ . '/file',
- array(
- 'render_callback' => 'render_block_core_file',
- )
- );
- }
- add_action( 'init', 'register_block_core_file' );
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