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anchor.php
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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', ) );