WP_Block::process_block_bindings(): array

282	private function process_block_bindings() {283		$parsed_block               = $this->parsed_block;284		$computed_attributes        = array();285		$supported_block_attributes = array(286			'core/paragraph' => array( 'content' ),287			'core/heading'   => array( 'content' ),288			'core/image'     => array( 'id', 'url', 'title', 'alt' ),289			'core/button'    => array( 'url', 'text', 'linkTarget', 'rel' ),290		);291 292		// If the block doesn't have the bindings property, isn't one of the supported293		// block types, or the bindings property is not an array, return the block content.294		if (295			! isset( $supported_block_attributes[ $this->name ] ) ||296			empty( $parsed_block['attrs']['metadata']['bindings'] ) ||297			! is_array( $parsed_block['attrs']['metadata']['bindings'] )298		) {299			return $computed_attributes;300		}301 302		$bindings = $parsed_block['attrs']['metadata']['bindings'];303 304		/*305		 * If the default binding is set for pattern overrides, replace it306		 * with a pattern override binding for all supported attributes.307		 */308		if (309			isset( $bindings['__default']['source'] ) &&310			'core/pattern-overrides' === $bindings['__default']['source']311		) {312			$updated_bindings = array();313 314			/*315			 * Build a binding array of all supported attributes.316			 * Note that this also omits the `__default` attribute from the317			 * resulting array.318			 */319			foreach ( $supported_block_attributes[ $parsed_block['blockName'] ] as $attribute_name ) {320				// Retain any non-pattern override bindings that might be present.321				$updated_bindings[ $attribute_name ] = isset( $bindings[ $attribute_name ] )322					? $bindings[ $attribute_name ]323					: array( 'source' => 'core/pattern-overrides' );324			}325			$bindings = $updated_bindings;326			/*327			 * Update the bindings metadata of the computed attributes.328			 * This ensures the block receives the expanded __default binding metadata when it renders.329			 */330			$computed_attributes['metadata'] = array_merge(331				$parsed_block['attrs']['metadata'],332				array( 'bindings' => $bindings )333			);334		}335 336		foreach ( $bindings as $attribute_name => $block_binding ) {337			// If the attribute is not in the supported list, process next attribute.338			if ( ! in_array( $attribute_name, $supported_block_attributes[ $this->name ], true ) ) {339				continue;340			}341			// If no source is provided, or that source is not registered, process next attribute.342			if ( ! isset( $block_binding['source'] ) || ! is_string( $block_binding['source'] ) ) {343				continue;344			}345 346			$block_binding_source = get_block_bindings_source( $block_binding['source'] );347			if ( null === $block_binding_source ) {348				continue;349			}350 351			// Adds the necessary context defined by the source.352			if ( ! empty( $block_binding_source->uses_context ) ) {353				foreach ( $block_binding_source->uses_context as $context_name ) {354					if ( array_key_exists( $context_name, $this->available_context ) ) {355						$this->context[ $context_name ] = $this->available_context[ $context_name ];356					}357				}358			}359 360			$source_args  = ! empty( $block_binding['args'] ) && is_array( $block_binding['args'] ) ? $block_binding['args'] : array();361			$source_value = $block_binding_source->get_value( $source_args, $this, $attribute_name );