first commit

wp/wp-includes/blocks/file.php

@@ -0,0 +1,58 @@
+<?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' );