Parsing: Use full parser in do_blocks with nested block support

WordPress · Oct 27, 2018 · 4a4feba · 4a4feba
1 parent 0faf9ad
commit 4a4feba
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Showing 2 changed files with 44 additions and 76 deletions.
diff --git a/lib/blocks.php b/lib/blocks.php
@@ -150,12 +150,12 @@ function get_dynamic_blocks_regex() {
  * @since 1.9.0
  *
  * @param  array $block A single parsed block object.
+ * @param  array $inner_blocks A list of processed inner blocks.
  * @return string String of rendered HTML.
  */
-function gutenberg_render_block( $block ) {
+function gutenberg_render_block( $block, $inner_blocks = [] ) {
 	$block_name  = isset( $block['blockName'] ) ? $block['blockName'] : null;
 	$attributes  = is_array( $block['attrs'] ) ? $block['attrs'] : array();
-	$raw_content = isset( $block['innerHTML'] ) ? $block['innerHTML'] : null;
 
 	if ( $block_name ) {
 		$block_type = WP_Block_Type_Registry::get_instance()->get_registered( $block_name );
@@ -164,11 +164,32 @@ function gutenberg_render_block( $block ) {
 		}
 	}
 
-	if ( $raw_content ) {
-		return $raw_content;
+	if ( empty( $block['blockMarkers' ] ) ) {
+		return $block['innerHTML'];
 	}
 
-	return '';
+	$output = '';
+	$index = 0;
+	foreach( $block['blockMarkers'] as $i => $p ) {
+		$output .= substr( $block['innerHTML'], $index, $p - $index );
+		$output .= $inner_blocks[ $i ];
+		$index = $p;
+	}
+	$output .= substr( $block['innerHTML'], $index );
+
+	return $output;
+}
+
+if ( ! class_exists( 'BlockRecursiveIteratorFilter' ) ) {
+	class BlockRecursiveIteratorFilter extends RecursiveFilterIterator {
+		public function accept() {
+			return is_array( $this->current() );
+		}
+
+		public function getChildren() {
+			return new self( new RecursiveArrayIterator( $this->current()['innerBlocks'] ) );
+		}
+	}
 }
 
 if ( ! function_exists( 'do_blocks' ) ) {
@@ -183,84 +204,31 @@ function gutenberg_render_block( $block ) {
 	 */
 	function do_blocks( $content ) {
 		global $post;
-
-		$rendered_content      = '';
-		$dynamic_block_pattern = get_dynamic_blocks_regex();
-
-		/*
-		 * Back up global post, to restore after render callback.
-		 * Allows callbacks to run new WP_Query instances without breaking the global post.
-		 */
 		$global_post = $post;
 
-		while ( preg_match( $dynamic_block_pattern, $content, $block_match, PREG_OFFSET_CAPTURE ) ) {
-			$opening_tag     = $block_match[0][0];
-			$offset          = $block_match[0][1];
-			$block_name      = $block_match[1][0];
-			$is_self_closing = isset( $block_match[4] );
-
-			// Reset attributes JSON to prevent scope bleed from last iteration.
-			$block_attributes_json = null;
-			if ( isset( $block_match[3] ) ) {
-				$block_attributes_json = $block_match[3][0];
+		$blocks = gutenberg_parse_blocks( $content );
+		$rai = new RecursiveArrayIterator( $blocks );
+		$rfi = new BlockRecursiveIteratorFilter( $rai );
+		$rii = new RecursiveIteratorIterator( $rfi, RecursiveIteratorIterator::CHILD_FIRST );
+		$stack = array();
+
+		foreach ( $rii as $block ) {
+			if ( ! empty( $block['innerBlocks'] ) ) {
+				$inner_blocks = array_splice( $stack, -1 * count( $block['innerBlocks'] ) );
+				$stack[] = gutenberg_render_block( $block, $inner_blocks );
+			} else {
+				$stack[] = gutenberg_render_block( $block );
 			}
 
-			// Since content is a working copy since the last match, append to
-			// rendered content up to the matched offset...
-			$rendered_content .= substr( $content, 0, $offset );
-
-			// ...then update the working copy of content.
-			$content = substr( $content, $offset + strlen( $opening_tag ) );
-
-			// Make implicit core namespace explicit.
-			$is_implicit_core_namespace = ( false === strpos( $block_name, '/' ) );
-			$normalized_block_name      = $is_implicit_core_namespace ? 'core/' . $block_name : $block_name;
-
-			// Find registered block type. We can assume it exists since we use the
-			// `get_dynamic_block_names` function as a source for pattern matching.
-			$block_type = WP_Block_Type_Registry::get_instance()->get_registered( $normalized_block_name );
-
-			// Attempt to parse attributes JSON, if available.
-			$attributes = array();
-			if ( ! empty( $block_attributes_json ) ) {
-				$decoded_attributes = json_decode( $block_attributes_json, true );
-				if ( ! is_null( $decoded_attributes ) ) {
-					$attributes = $decoded_attributes;
-				}
-			}
-
-			$inner_content = '';
-
-			if ( ! $is_self_closing ) {
-				$end_tag_pattern = '/<!--\s+\/wp:' . str_replace( '/', '\/', preg_quote( $block_name ) ) . '\s+-->/';
-				if ( ! preg_match( $end_tag_pattern, $content, $block_match_end, PREG_OFFSET_CAPTURE ) ) {
-					// If no closing tag is found, abort all matching, and continue
-					// to append remainder of content to rendered output.
-					break;
-				}
-
-				// Update content to omit text up to and including closing tag.
-				$end_tag    = $block_match_end[0][0];
-				$end_offset = $block_match_end[0][1];
-
-				$inner_content = substr( $content, 0, $end_offset );
-				$content       = substr( $content, $end_offset + strlen( $end_tag ) );
-			}
-
-			// Replace dynamic block with server-rendered output.
-			$rendered_content .= $block_type->render( $attributes, $inner_content );
-
-			// Restore global $post.
 			$post = $global_post;
 		}
 
-		// Append remaining unmatched content.
-		$rendered_content .= $content;
-
-		// Strip remaining block comment demarcations.
-		$rendered_content = preg_replace( '/<!--\s+\/?wp:.*?-->\r?\n?/m', '', $rendered_content );
+		$output = '';
+		foreach( $stack as $block ) {
+			$output .= $block;
+		}
 
-		return $rendered_content;
+		return $output;
 	}
 
 	add_filter( 'the_content', 'do_blocks', 7 ); // BEFORE do_shortcode() and oembed.

diff --git a/packages/block-serialization-default-parser/parser.php b/packages/block-serialization-default-parser/parser.php
@@ -460,7 +460,7 @@ function add_inner_block( WP_Block_Parser_Block $block, $token_start, $token_len
 			? $parent->block->blockMarkers[ count( $parent->block->blockMarkers ) - 1 ]
 			: 0;
 
-		$parent->block->innerBlocks[] = $block;
+		$parent->block->innerBlocks[] = (array) $block;
 		$parent->block->blockMarkers[] = $prev_length + self::ucs2length( $next_html );
 		$parent->block->innerHTML .= $next_html;
 		$parent->prev_offset = $last_offset ? $last_offset : $token_start + $token_length;