309 lines
8.8 KiB
PHP
309 lines
8.8 KiB
PHP
<?php
|
|
/**
|
|
* Block Bindings API: WP_Block_Bindings_Registry class.
|
|
*
|
|
* Supports overriding content in blocks by connecting them to different sources.
|
|
*
|
|
* @package WordPress
|
|
* @subpackage Block Bindings
|
|
* @since 6.5.0
|
|
*/
|
|
|
|
/**
|
|
* Core class used for interacting with block bindings sources.
|
|
*
|
|
* @since 6.5.0
|
|
*/
|
|
final class WP_Block_Bindings_Registry {
|
|
|
|
/**
|
|
* Holds the registered block bindings sources, keyed by source identifier.
|
|
*
|
|
* @since 6.5.0
|
|
* @var WP_Block_Bindings_Source[]
|
|
*/
|
|
private $sources = array();
|
|
|
|
/**
|
|
* Container for the main instance of the class.
|
|
*
|
|
* @since 6.5.0
|
|
* @var WP_Block_Bindings_Registry|null
|
|
*/
|
|
private static $instance = null;
|
|
|
|
/**
|
|
* Supported source properties that can be passed to the registered source.
|
|
*
|
|
* @since 6.5.0
|
|
* @var string[]
|
|
*/
|
|
private $allowed_source_properties = array(
|
|
'label',
|
|
'get_value_callback',
|
|
'uses_context',
|
|
);
|
|
|
|
/**
|
|
* Supported blocks that can use the block bindings API.
|
|
*
|
|
* @since 6.5.0
|
|
* @var string[]
|
|
*/
|
|
private $supported_blocks = array(
|
|
'core/paragraph',
|
|
'core/heading',
|
|
'core/image',
|
|
'core/button',
|
|
);
|
|
|
|
/**
|
|
* Registers a new block bindings source.
|
|
*
|
|
* This is a low-level method. For most use cases, it is recommended to use
|
|
* the `register_block_bindings_source()` function instead.
|
|
*
|
|
* @see register_block_bindings_source()
|
|
*
|
|
* 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. It must be a string containing a namespace prefix, i.e.
|
|
* `my-plugin/my-custom-source`. It must only contain lowercase alphanumeric
|
|
* characters, the forward slash `/` and dashes.
|
|
* @param array $source_properties {
|
|
* The array of arguments that are used to register a source.
|
|
*
|
|
* @type string $label The label of the source.
|
|
* @type callable $get_value_callback A callback executed when the source is processed during block rendering.
|
|
* The callback should have the following signature:
|
|
*
|
|
* `function ($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 the target 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.
|
|
* @type string[] $uses_context (optional) Array of values to add to block `uses_context` needed by the source.
|
|
* }
|
|
* @return WP_Block_Bindings_Source|false Source when the registration was successful, or `false` on failure.
|
|
*/
|
|
public function register( string $source_name, array $source_properties ) {
|
|
if ( ! is_string( $source_name ) ) {
|
|
_doing_it_wrong(
|
|
__METHOD__,
|
|
__( 'Block bindings source name must be a string.' ),
|
|
'6.5.0'
|
|
);
|
|
return false;
|
|
}
|
|
|
|
if ( preg_match( '/[A-Z]+/', $source_name ) ) {
|
|
_doing_it_wrong(
|
|
__METHOD__,
|
|
__( 'Block bindings source names must not contain uppercase characters.' ),
|
|
'6.5.0'
|
|
);
|
|
return false;
|
|
}
|
|
|
|
$name_matcher = '/^[a-z0-9-]+\/[a-z0-9-]+$/';
|
|
if ( ! preg_match( $name_matcher, $source_name ) ) {
|
|
_doing_it_wrong(
|
|
__METHOD__,
|
|
__( 'Block bindings source names must contain a namespace prefix. Example: my-plugin/my-custom-source' ),
|
|
'6.5.0'
|
|
);
|
|
return false;
|
|
}
|
|
|
|
if ( $this->is_registered( $source_name ) ) {
|
|
_doing_it_wrong(
|
|
__METHOD__,
|
|
/* translators: %s: Block bindings source name. */
|
|
sprintf( __( 'Block bindings source "%s" already registered.' ), $source_name ),
|
|
'6.5.0'
|
|
);
|
|
return false;
|
|
}
|
|
|
|
// Validates that the source properties contain the label.
|
|
if ( ! isset( $source_properties['label'] ) ) {
|
|
_doing_it_wrong(
|
|
__METHOD__,
|
|
__( 'The $source_properties must contain a "label".' ),
|
|
'6.5.0'
|
|
);
|
|
return false;
|
|
}
|
|
|
|
// Validates that the source properties contain the get_value_callback.
|
|
if ( ! isset( $source_properties['get_value_callback'] ) ) {
|
|
_doing_it_wrong(
|
|
__METHOD__,
|
|
__( 'The $source_properties must contain a "get_value_callback".' ),
|
|
'6.5.0'
|
|
);
|
|
return false;
|
|
}
|
|
|
|
// Validates that the get_value_callback is a valid callback.
|
|
if ( ! is_callable( $source_properties['get_value_callback'] ) ) {
|
|
_doing_it_wrong(
|
|
__METHOD__,
|
|
__( 'The "get_value_callback" parameter must be a valid callback.' ),
|
|
'6.5.0'
|
|
);
|
|
return false;
|
|
}
|
|
|
|
// Validates that the uses_context parameter is an array.
|
|
if ( isset( $source_properties['uses_context'] ) && ! is_array( $source_properties['uses_context'] ) ) {
|
|
_doing_it_wrong(
|
|
__METHOD__,
|
|
__( 'The "uses_context" parameter must be an array.' ),
|
|
'6.5.0'
|
|
);
|
|
return false;
|
|
}
|
|
|
|
if ( ! empty( array_diff( array_keys( $source_properties ), $this->allowed_source_properties ) ) ) {
|
|
_doing_it_wrong(
|
|
__METHOD__,
|
|
__( 'The $source_properties array contains invalid properties.' ),
|
|
'6.5.0'
|
|
);
|
|
return false;
|
|
}
|
|
|
|
$source = new WP_Block_Bindings_Source(
|
|
$source_name,
|
|
$source_properties
|
|
);
|
|
|
|
$this->sources[ $source_name ] = $source;
|
|
|
|
// Adds `uses_context` defined by block bindings sources.
|
|
add_filter(
|
|
'get_block_type_uses_context',
|
|
function ( $uses_context, $block_type ) use ( $source ) {
|
|
if ( ! in_array( $block_type->name, $this->supported_blocks, true ) || empty( $source->uses_context ) ) {
|
|
return $uses_context;
|
|
}
|
|
// Use array_values to reset the array keys.
|
|
return array_values( array_unique( array_merge( $uses_context, $source->uses_context ) ) );
|
|
},
|
|
10,
|
|
2
|
|
);
|
|
|
|
return $source;
|
|
}
|
|
|
|
/**
|
|
* Unregisters a block bindings source.
|
|
*
|
|
* @since 6.5.0
|
|
*
|
|
* @param string $source_name Block bindings source name including namespace.
|
|
* @return WP_Block_Bindings_Source|false The unregistered block bindings source on success and `false` otherwise.
|
|
*/
|
|
public function unregister( string $source_name ) {
|
|
if ( ! $this->is_registered( $source_name ) ) {
|
|
_doing_it_wrong(
|
|
__METHOD__,
|
|
/* translators: %s: Block bindings source name. */
|
|
sprintf( __( 'Block binding "%s" not found.' ), $source_name ),
|
|
'6.5.0'
|
|
);
|
|
return false;
|
|
}
|
|
|
|
$unregistered_source = $this->sources[ $source_name ];
|
|
unset( $this->sources[ $source_name ] );
|
|
|
|
return $unregistered_source;
|
|
}
|
|
|
|
/**
|
|
* Retrieves the list of all registered block bindings sources.
|
|
*
|
|
* @since 6.5.0
|
|
*
|
|
* @return WP_Block_Bindings_Source[] The array of registered sources.
|
|
*/
|
|
public function get_all_registered() {
|
|
return $this->sources;
|
|
}
|
|
|
|
/**
|
|
* Retrieves a registered block bindings source.
|
|
*
|
|
* @since 6.5.0
|
|
*
|
|
* @param string $source_name The name of the source.
|
|
* @return WP_Block_Bindings_Source|null The registered block bindings source, or `null` if it is not registered.
|
|
*/
|
|
public function get_registered( string $source_name ) {
|
|
if ( ! $this->is_registered( $source_name ) ) {
|
|
return null;
|
|
}
|
|
|
|
return $this->sources[ $source_name ];
|
|
}
|
|
|
|
/**
|
|
* Checks if a block bindings source is registered.
|
|
*
|
|
* @since 6.5.0
|
|
*
|
|
* @param string $source_name The name of the source.
|
|
* @return bool `true` if the block bindings source is registered, `false` otherwise.
|
|
*/
|
|
public function is_registered( $source_name ) {
|
|
return isset( $this->sources[ $source_name ] );
|
|
}
|
|
|
|
/**
|
|
* Wakeup magic method.
|
|
*
|
|
* @since 6.5.0
|
|
*/
|
|
public function __wakeup() {
|
|
if ( ! $this->sources ) {
|
|
return;
|
|
}
|
|
if ( ! is_array( $this->sources ) ) {
|
|
throw new UnexpectedValueException();
|
|
}
|
|
foreach ( $this->sources as $value ) {
|
|
if ( ! $value instanceof WP_Block_Bindings_Source ) {
|
|
throw new UnexpectedValueException();
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Utility method to retrieve the main instance of the class.
|
|
*
|
|
* The instance will be created if it does not exist yet.
|
|
*
|
|
* @since 6.5.0
|
|
*
|
|
* @return WP_Block_Bindings_Registry The main instance.
|
|
*/
|
|
public static function get_instance() {
|
|
if ( null === self::$instance ) {
|
|
self::$instance = new self();
|
|
}
|
|
|
|
return self::$instance;
|
|
}
|
|
}
|