Editor: Simplify the block bindings HTML replacement logic until the HTML API is ready.

This changeset modifies the block bindings HTML replacement logic to use a hardcoded list of selectors based on the block and a regex to substitute the inner content. The previous logic was too complex because the HTML API does not support CSS selectors yet and it does not have an official way to modify the inner HTML. This made it difficult to understand, iterate on it and add new functionalities.
As it will be solved in the future once the HTML API is ready, it is better for now to keep a simple hardcoded version that is easier to understand and iterate on.

Props santosguillamot, gziolo, petitphp.
Fixes #61351.



Built from https://develop.svn.wordpress.org/trunk@58298


git-svn-id: https://core.svn.wordpress.org/trunk@57758 1a063a9b-81f0-0310-95a4-ce76da25c4cd

Author: audrasjb

wp-includes/class-wp-block.php

@@ -333,68 +333,27 @@ private function replace_html( string $block_content, string $attribute_name, $s
 		switch ( $block_type->attributes[ $attribute_name ]['source'] ) {
 			case 'html':
 			case 'rich-text':
-				$block_reader = new WP_HTML_Tag_Processor( $block_content );
-
-				// TODO: Support for CSS selectors whenever they are ready in the HTML API.
-				// In the meantime, support comma-separated selectors by exploding them into an array.
-				$selectors = explode( ',', $block_type->attributes[ $attribute_name ]['selector'] );
-				// Add a bookmark to the first tag to be able to iterate over the selectors.
-				$block_reader->next_tag();
-				$block_reader->set_bookmark( 'iterate-selectors' );
-
-				// TODO: This shouldn't be needed when the `set_inner_html` function is ready.
-				// Store the parent tag and its attributes to be able to restore them later in the button.
-				// The button block has a wrapper while the paragraph and heading blocks don't.
-				if ( 'core/button' === $this->name ) {
-					$button_wrapper                 = $block_reader->get_tag();
-					$button_wrapper_attribute_names = $block_reader->get_attribute_names_with_prefix( '' );
-					$button_wrapper_attrs           = array();
-					foreach ( $button_wrapper_attribute_names as $name ) {
-						$button_wrapper_attrs[ $name ] = $block_reader->get_attribute( $name );
-					}
+				// Hardcode the selectors and processing until the HTML API is able to read CSS selectors and replace inner HTML.
+				// TODO: Use the HTML API instead.
+				if ( 'core/paragraph' === $this->name && 'content' === $attribute_name ) {
+					$selector = 'p';
 				}
-
-				foreach ( $selectors as $selector ) {
-					// If the parent tag, or any of its children, matches the selector, replace the HTML.
-					if ( strcasecmp( $block_reader->get_tag( $selector ), $selector ) === 0 || $block_reader->next_tag(
-						array(
-							'tag_name' => $selector,
-						)
-					) ) {
-						$block_reader->release_bookmark( 'iterate-selectors' );
-
-						// TODO: Use `set_inner_html` method whenever it's ready in the HTML API.
-						// Until then, it is hardcoded for the paragraph, heading, and button blocks.
-						// Store the tag and its attributes to be able to restore them later.
-						$selector_attribute_names = $block_reader->get_attribute_names_with_prefix( '' );
-						$selector_attrs           = array();
-						foreach ( $selector_attribute_names as $name ) {
-							$selector_attrs[ $name ] = $block_reader->get_attribute( $name );
-						}
-						$selector_markup = "<$selector>" . wp_kses_post( $source_value ) . "</$selector>";
-						$amended_content = new WP_HTML_Tag_Processor( $selector_markup );
-						$amended_content->next_tag();
-						foreach ( $selector_attrs as $attribute_key => $attribute_value ) {
-							$amended_content->set_attribute( $attribute_key, $attribute_value );
-						}
-						if ( 'core/paragraph' === $this->name || 'core/heading' === $this->name ) {
-							return $amended_content->get_updated_html();
-						}
-						if ( 'core/button' === $this->name ) {
-							$button_markup  = "<$button_wrapper>{$amended_content->get_updated_html()}</$button_wrapper>";
-							$amended_button = new WP_HTML_Tag_Processor( $button_markup );
-							$amended_button->next_tag();
-							foreach ( $button_wrapper_attrs as $attribute_key => $attribute_value ) {
-								$amended_button->set_attribute( $attribute_key, $attribute_value );
-							}
-							return $amended_button->get_updated_html();
-						}
+				if ( 'core/heading' === $this->name && 'content' === $attribute_name ) {
+					$selector = 'h[1-6]';
+				}
+				if ( 'core/button' === $this->name && 'text' === $attribute_name ) {
+					// Check if it is a <button> or <a> tag.
+					if ( preg_match( '/<button[^>]*>.*?<\/button>/', $block_content ) ) {
+						$selector = 'button';
 					} else {
-						$block_reader->seek( 'iterate-selectors' );
+						$selector = 'a';
 					}
 				}
-				$block_reader->release_bookmark( 'iterate-selectors' );
-				return $block_content;
+				if ( empty( $selector ) ) {
+					return $block_content;
+				}
+				$pattern = '/(<' . $selector . '[^>]*>).*?(<\/' . $selector . '>)/i';
+				return preg_replace( $pattern, '$1' . wp_kses_post( $source_value ) . '$2', $block_content );
 
 			case 'attribute':
 				$amended_content = new WP_HTML_Tag_Processor( $block_content );
@@ -408,13 +367,10 @@ private function replace_html( string $block_content, string $attribute_name, $s
 				}
 				$amended_content->set_attribute( $block_type->attributes[ $attribute_name ]['attribute'], $source_value );
 				return $amended_content->get_updated_html();
-				break;
 
 			default:
 				return $block_content;
-				break;
 		}
-		return;
 	}
 
 

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.6-alpha-58297';
+$wp_version = '6.6-alpha-58298';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.