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Block Bindings: Adapt block bindings to wordpress code latest changes (…
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…#58383)

* Update sources registration logic

* Remove old function from pattern source

* Update pattern source logic

* Adapt `WP_Block_Bindings_Registry` class

* Adapt block bindings methods

* Override core sources in Gutenberg

* Use `get_value_callback`

* Move `block_bindings_replace_html` to `blocks.php`

* Remove unnecessary `function_exists` checks

* Load class file only if it doesn't exist

* Load class before it is used
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@SantosGuillamot @youknowriad
SantosGuillamot authored and youknowriad committed Jan 31, 2024
1 parent abd7fc7 commit 3539178
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181 changes: 45 additions & 136 deletions lib/compat/wordpress-6.5/block-bindings/block-bindings.php
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/**
* Block Bindings API
*
* This file contains functions for managing block bindings in WordPress.
* Contains functions for managing block bindings in WordPress.
*
* @since 17.6.0
* @package gutenberg
* @package WordPress
* @subpackage Block Bindings
* @since 6.5.0
*/

/**
* Retrieves the singleton instance of WP_Block_Bindings.
* Registers a new block bindings source.
*
* @return WP_Block_Bindings The WP_Block_Bindings instance.
*/
if ( ! function_exists( 'wp_block_bindings' ) ) {
function wp_block_bindings() {
static $instance = null;
if ( is_null( $instance ) ) {
$instance = new WP_Block_Bindings();
}
return $instance;
}
}

/**
* Registers a new source for block bindings.
* Sources are used to override block's original attributes with a value
* coming from the source. Once a source is registered, it can be used by a
* block by setting its `metadata.bindings` attribute to a value that refers
* to the source.
*
* @since 6.5.0
*
* @param string $source_name The name of the source.
* @param array $source_properties The array of arguments that are used to register a source. The array has two elements:
* 1. string $label The label of the source.
* 2. callback $apply A callback
* executed when the source is processed during
* block rendering. The callback should have the
* following signature:
* @param string $source_name The name of the source.
* @param array $source_properties {
* The array of arguments that are used to register a source.
*
* `function (object $source_attrs, object $block_instance, string $attribute_name): string`
* - @param object $source_attrs: Object containing source ID used to look up the override value, i.e. {"value": "{ID}"}.
* - @param object $block_instance: The block instance.
* - @param string $attribute_name: The name of an attribute used to retrieve an override value from the block context.
* The callback should return a string that will be used to override the block's original value.
* @type string $label The label of the source.
* @type callback $get_value_callback A callback executed when the source is processed during block rendering.
* The callback should have the following signature:
*
* @return void
* `function ($source_args, $block_instance,$attribute_name): mixed`
* - @param array $source_args Array containing source arguments
* used to look up the override value,
* i.e. {"key": "foo"}.
* - @param WP_Block $block_instance The block instance.
* - @param string $attribute_name The name of an attribute .
* The callback has a mixed return type; it may return a string to override
* the block's original value, null, false to remove an attribute, etc.
* }
* @return array|false Source when the registration was successful, or `false` on failure.
*/
if ( ! function_exists( 'wp_block_bindings_register_source' ) ) {
function wp_block_bindings_register_source( $source_name, array $source_properties ) {
wp_block_bindings()->register_source( $source_name, $source_properties );
if ( ! function_exists( 'register_block_bindings_source' ) ) {
function register_block_bindings_source( $source_name, array $source_properties ) {
return WP_Block_Bindings_Registry::get_instance()->register( $source_name, $source_properties );
}
}

/**
* Retrieves the list of registered block sources.
* Unregisters a block bindings source.
*
* @return array The list of registered block sources.
* @since 6.5.0
*
* @param string $source_name Block bindings source name including namespace.
* @return array|false The unregistred block bindings source on success and `false` otherwise.
*/
if ( ! function_exists( 'wp_block_bindings_get_sources' ) ) {
function wp_block_bindings_get_sources() {
return wp_block_bindings()->get_sources();
if ( ! function_exists( 'unregister_block_bindings_source' ) ) {
function unregister_block_bindings_source( $source_name ) {
return WP_Block_Bindings_Registry::get_instance()->unregister( $source_name );
}
}

/**
* Replaces the HTML content of a block based on the provided source value.
* Retrieves the list of all registered block bindings sources.
*
* @since 6.5.0
*
* @param string $block_content Block Content.
* @param string $block_name The name of the block to process.
* @param string $block_attr The attribute of the block we want to process.
* @param string $source_value The value used to replace the HTML.
* @return string The modified block content.
* @return array The array of registered block bindings sources.
*/
function gutenberg_block_bindings_replace_html( $block_content, $block_name, $block_attr, $source_value ) {
$block_type = WP_Block_Type_Registry::get_instance()->get_registered( $block_name );
if ( null === $block_type ) {
return;
}

// Depending on the attribute source, the processing will be different.
switch ( $block_type->attributes[ $block_attr ]['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[ $block_attr ]['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' === $block_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' === $block_name || 'core/heading' === $block_name ) {
return $amended_content->get_updated_html();
}
if ( 'core/button' === $block_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[ $block_attr ]['selector'],
)
) ) {
return $block_content;
}
$amended_content->set_attribute( $block_type->attributes[ $block_attr ]['attribute'], esc_attr( $source_value ) );
return $amended_content->get_updated_html();
break;

default:
return $block_content;
break;
if ( ! function_exists( 'get_all_registered_block_bindings_sources' ) ) {
function get_all_registered_block_bindings_sources() {
return WP_Block_Bindings_Registry::get_instance()->get_all_registered();
}
return;
}
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