Adding upstream version 6.5+dfsg1.upstream/6.5+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 217 insertions, 0 deletions

diff --git a/wp-includes/class-wp-block.php b/wp-includes/class-wp-block.php
index 65d3af6..60c026e 100644
--- a/wp-includes/class-wp-block.php
+++ b/wp-includes/class-wp-block.php
@@ -192,9 +192,201 @@ class WP_Block {
 	}
 
 	/**
+	 * Processes the block bindings and updates the block attributes with the values from the sources.
+	 *
+	 * A block might contain bindings in its attributes. Bindings are mappings
+	 * between an attribute of the block and a source. A "source" is a function
+	 * registered with `register_block_bindings_source()` that defines how to
+	 * retrieve a value from outside the block, e.g. from post meta.
+	 *
+	 * This function will process those bindings and update the block's attributes
+	 * with the values coming from the bindings.
+	 *
+	 * ### Example
+	 *
+	 * The "bindings" property for an Image block might look like this:
+	 *
+	 * ```json
+	 * {
+	 *   "metadata": {
+	 *     "bindings": {
+	 *       "title": {
+	 *         "source": "core/post-meta",
+	 *         "args": { "key": "text_custom_field" }
+	 *       },
+	 *       "url": {
+	 *         "source": "core/post-meta",
+	 *         "args": { "key": "url_custom_field" }
+	 *       }
+	 *     }
+	 *   }
+	 * }
+	 * ```
+	 *
+	 * The above example will replace the `title` and `url` attributes of the Image
+	 * block with the values of the `text_custom_field` and `url_custom_field` post meta.
+	 *
+	 * @since 6.5.0
+	 *
+	 * @return array The computed block attributes for the provided block bindings.
+	 */
+	private function process_block_bindings() {
+		$parsed_block               = $this->parsed_block;
+		$computed_attributes        = array();
+		$supported_block_attributes = array(
+			'core/paragraph' => array( 'content' ),
+			'core/heading'   => array( 'content' ),
+			'core/image'     => array( 'id', 'url', 'title', 'alt' ),
+			'core/button'    => array( 'url', 'text', 'linkTarget', 'rel' ),
+		);
+
+		// If the block doesn't have the bindings property, isn't one of the supported
+		// block types, or the bindings property is not an array, return the block content.
+		if (
+			! isset( $supported_block_attributes[ $this->name ] ) ||
+			empty( $parsed_block['attrs']['metadata']['bindings'] ) ||
+			! is_array( $parsed_block['attrs']['metadata']['bindings'] )
+		) {
+			return $computed_attributes;
+		}
+
+		foreach ( $parsed_block['attrs']['metadata']['bindings'] as $attribute_name => $block_binding ) {
+			// If the attribute is not in the supported list, process next attribute.
+			if ( ! in_array( $attribute_name, $supported_block_attributes[ $this->name ], true ) ) {
+				continue;
+			}
+			// If no source is provided, or that source is not registered, process next attribute.
+			if ( ! isset( $block_binding['source'] ) || ! is_string( $block_binding['source'] ) ) {
+				continue;
+			}
+
+			$block_binding_source = get_block_bindings_source( $block_binding['source'] );
+			if ( null === $block_binding_source ) {
+				continue;
+			}
+
+			$source_args  = ! empty( $block_binding['args'] ) && is_array( $block_binding['args'] ) ? $block_binding['args'] : array();
+			$source_value = $block_binding_source->get_value( $source_args, $this, $attribute_name );
+
+			// If the value is not null, process the HTML based on the block and the attribute.
+			if ( ! is_null( $source_value ) ) {
+				$computed_attributes[ $attribute_name ] = $source_value;
+			}
+		}
+
+		return $computed_attributes;
+	}
+
+	/**
+	 * Depending on the block attribute name, replace its value in the HTML based on the value provided.
+	 *
+	 * @since 6.5.0
+	 *
+	 * @param string $block_content  Block content.
+	 * @param string $attribute_name The attribute name to replace.
+	 * @param mixed  $source_value   The value used to replace in the HTML.
+	 * @return string The modified block content.
+	 */
+	private function replace_html( string $block_content, string $attribute_name, $source_value ) {
+		$block_type = $this->block_type;
+		if ( ! isset( $block_type->attributes[ $attribute_name ]['source'] ) ) {
+			return $block_content;
+		}
+
+		// Depending on the attribute source, the processing will be different.
+		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 );
+					}
+				}
+
+				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();
+						}
+					} else {
+						$block_reader->seek( 'iterate-selectors' );
+					}
+				}
+				$block_reader->release_bookmark( 'iterate-selectors' );
+				return $block_content;
+
+			case 'attribute':
+				$amended_content = new WP_HTML_Tag_Processor( $block_content );
+				if ( ! $amended_content->next_tag(
+					array(
+						// TODO: build the query from CSS selector.
+						'tag_name' => $block_type->attributes[ $attribute_name ]['selector'],
+					)
+				) ) {
+					return $block_content;
+				}
+				$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;
+	}
+
+
+	/**
 	 * Generates the render output for the block.
 	 *
 	 * @since 5.5.0
+	 * @since 6.5.0 Added block bindings processing.
 	 *
 	 * @global WP_Post $post Global post object.
 	 *
@@ -214,6 +406,13 @@ class WP_Block {
 			)
 		);
 
+		// Process the block bindings and get attributes updated with the values from the sources.
+		$computed_attributes = $this->process_block_bindings();
+		if ( ! empty( $computed_attributes ) ) {
+			// Merge the computed attributes with the original attributes.
+			$this->attributes = array_merge( $this->attributes, $computed_attributes );
+		}
+
 		$is_dynamic    = $options['dynamic'] && $this->name && null !== $this->block_type && $this->block_type->is_dynamic();
 		$block_content = '';
 
@@ -249,6 +448,12 @@ class WP_Block {
 			}
 		}
 
+		if ( ! empty( $computed_attributes ) && ! empty( $block_content ) ) {
+			foreach ( $computed_attributes as $attribute_name => $source_value ) {
+				$block_content = $this->replace_html( $block_content, $attribute_name, $source_value );
+			}
+		}
+
 		if ( $is_dynamic ) {
 			$global_post = $post;
 			$parent      = WP_Block_Supports::$block_to_render;
@@ -274,12 +479,24 @@ class WP_Block {
 			}
 		}
 
+		if ( ! empty( $this->block_type->view_script_module_ids ) ) {
+			foreach ( $this->block_type->view_script_module_ids as $view_script_module_id ) {
+				wp_enqueue_script_module( $view_script_module_id );
+			}
+		}
+
 		if ( ( ! empty( $this->block_type->style_handles ) ) ) {
 			foreach ( $this->block_type->style_handles as $style_handle ) {
 				wp_enqueue_style( $style_handle );
 			}
 		}
 
+		if ( ( ! empty( $this->block_type->view_style_handles ) ) ) {
+			foreach ( $this->block_type->view_style_handles as $view_style_handle ) {
+				wp_enqueue_style( $view_style_handle );
+			}
+		}
+
 		/**
 		 * Filters the content of a single block.
 		 *