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<?php
/**
* Anchor block support flag.
*
* @package WordPress
* @since 7.0.0
*/
/**
* Registers the anchor block attribute for block types that support it.
*
* @since 7.0.0
* @access private
*
* @param WP_Block_Type $block_type Block Type.
*/
function wp_register_anchor_support( WP_Block_Type $block_type ) {
if ( ! block_has_support( $block_type, array( 'anchor' ) ) ) {
return;
}
if ( ! isset( $block_type->attributes ) ) {
$block_type->attributes = array();
}
if ( ! array_key_exists( 'anchor', $block_type->attributes ) ) {
$block_type->attributes['anchor'] = array(
'type' => 'string',
);
}
}
/**
* Add the anchor id to the output.
*
* @since 7.0.0
* @access private
*
* @param WP_Block_Type $block_type Block Type.
* @param array<string, mixed> $block_attributes Block attributes.
* @return array<string, string> Attributes with block anchor id.
*/
function wp_apply_anchor_support( WP_Block_Type $block_type, array $block_attributes ): array {
if ( empty( $block_attributes ) ) {
return array();
}
if ( ! block_has_support( $block_type, array( 'anchor' ) ) ) {
return array();
}
if ( ! isset( $block_attributes['anchor'] ) || ! is_string( $block_attributes['anchor'] ) || '' === $block_attributes['anchor'] ) {
return array();
}
return array( 'id' => $block_attributes['anchor'] );
}
// Register the block support.
WP_Block_Supports::get_instance()->register(
'anchor',
array(
'register_attribute' => 'wp_register_anchor_support',
'apply' => 'wp_apply_anchor_support',
)
);