ont end and editor style handles.
*
* @since 6.1.0
* @var string[]
*/
public $style_handles = array();
/**
* Block type front end only style handles.
*
* @since 6.5.0
* @var string[]
*/
public $view_style_handles = array();
/**
* Deprecated block type properties for script and style handles.
*
* @since 6.1.0
* @var string[]
*/
private $deprecated_properties = array(
'editor_script',
'script',
'view_script',
'editor_style',
'style',
);
/**
* Attributes supported by every block.
*
* @since 6.0.0 Added `lock`.
* @since 6.5.0 Added `metadata`.
* @var array
*/
const GLOBAL_ATTRIBUTES = array(
'lock' => array( 'type' => 'object' ),
'metadata' => array( 'type' => 'object' ),
);
/**
* Constructor.
*
* Will populate object properties from the provided arguments.
*
* @since 5.0.0
* @since 5.5.0 Added the `title`, `category`, `parent`, `icon`, `description`,
* `keywords`, `textdomain`, `styles`, `supports`, `example`,
* `uses_context`, and `provides_context` properties.
* @since 5.6.0 Added the `api_version` property.
* @since 5.8.0 Added the `variations` property.
* @since 5.9.0 Added the `view_script` property.
* @since 6.0.0 Added the `ancestor` property.
* @since 6.1.0 Added the `editor_script_handles`, `script_handles`, `view_script_handles`,
* `editor_style_handles`, and `style_handles` properties.
* Deprecated the `editor_script`, `script`, `view_script`, `editor_style`, and `style` properties.
* @since 6.3.0 Added the `selectors` property.
* @since 6.4.0 Added the `block_hooks` property.
* @since 6.5.0 Added the `allowed_blocks`, `variation_callback`, and `view_style_handles` properties.
*
* @see register_block_type()
*
* @param string $block_type Block type name including namespace.
* @param array|string $args {
* Optional. Array or string of arguments for registering a block type. Any arguments may be defined,
* however the ones described below are supported by default. Default empty array.
*
* @type string $api_version Block API version.
* @type string $title Human-readable block type label.
* @type string|null $category Block type category classification, used in
* search interfaces to arrange block types by category.
* @type string[]|null $parent Setting parent lets a block require that it is only
* available when nested within the specified blocks.
* @type string[]|null $ancestor Setting ancestor makes a block available only inside the specified
* block types at any position of the ancestor's block subtree.
* @type string[]|null $allowed_blocks Limits which block types can be inserted as children of this block type.
* @type string|null $icon Block type icon.
* @type string $description A detailed block type description.
* @type string[] $keywords Additional keywords to produce block type as
* result in search interfaces.
* @type string|null $textdomain The translation textdomain.
* @type array[] $styles Alternative block styles.
* @type array[] $variations Block variations.
* @type array $selectors Custom CSS selectors for theme.json style generation.
* @type array|null $supports Supported features.
* @type array|null $example Structured data for the block preview.
* @type callable|null $render_callback Block type render callback.
* @type callable|null $variation_callback Block type variations callback.
* @type array|null $attributes Block type attributes property schemas.
* @type string[] $uses_context Context values inherited by blocks of this type.
* @type string[]|null $provides_context Context provided by blocks of this type.
* @type string[] $block_hooks Block hooks.
* @type string[] $editor_script_handles Block type editor only script handles.
* @type string[] $script_handles Block type front end and editor script handles.
* @type string[] $view_script_handles Block type front end only script handles.
* @type string[] $editor_style_handles Block type editor only style handles.
* @type string[] $style_handles Block type front end and editor style handles.
* @type string[] $view_style_handles Block type front end only style handles.
* }
*/
public function __construct( $block_type, $args = array() ) {
$this->name = $block_type;
$this->set_props( $args );
}
/**
* Proxies getting values for deprecated properties for script and style handles for backward compatibility.
* Gets the value for the corresponding new property if the first item in the array provided.
*
* @since 6.1.0
*
* @param string $name Deprecated property name.
*
* @return string|string[]|null|void The value read from the new property if the first item in the array provided,
* null when value not found, or void when unknown property name provided.
*/
public function __get( $name ) {
if ( 'variations' === $name ) {
return $this->get_variations();
}
if ( 'uses_context' === $name ) {
return $this->get_uses_context();
}
if ( ! in_array( $name, $this->deprecated_properties, true ) ) {
return;
}
$new_name = $name . '_handles';
if ( ! property_exists( $this, $new_name ) || ! is_array( $this->{$new_name} ) ) {
return null;
}
if ( count( $this->{$new_name} ) > 1 ) {
return $this->{$new_name};
}
return isset( $this->{$new_name}[0] ) ? $this->{$new_name}[0] : null;
}
/**
* Proxies checking for deprecated properties for script and style handles for backward compatibility.
* Checks whether the corresponding new property has the first item in the array provided.
*
* @since 6.1.0
*
* @param string $name Deprecated property name.
*
* @return bool Returns true when for the new property the first item in the array exists,
* or false otherwise.
*/
public function __isset( $name ) {
if ( in_array( $name, array( 'variations', 'uses_context' ), true ) ) {
return true;
}
if ( ! in_array( $name, $this->deprecated_properties, true ) ) {
return false;
}
$new_name = $name . '_handles';
return isset( $this->{$new_name}[0] );
}
/**
* Proxies setting values for deprecated properties for script and style handles for backward compatibility.
* Sets the value for the corresponding new property as the first item in the array.
* It also allows setting custom properties for backward compatibility.
*
* @since 6.1.0
*
* @param string $name Property name.
* @param mixed $value Property value.
*/
public function __set( $name, $value ) {
if ( ! in_array( $name, $this->deprecated_properties, true ) ) {
$this->{$name} = $value;
return;
}
$new_name = $name . '_handles';
if ( is_array( $value ) ) {
$filtered = array_filter( $value, 'is_string' );
if ( count( $filtered ) !== count( $value ) ) {
_doing_it_wrong(
__METHOD__,
sprintf(
/* translators: %s: The '$value' argument. */
__( 'The %s argument must be a string or a string array.' ),
'$value'
),
'6.1.0'
);
}
$this->{$new_name} = array_values( $filtered );
return;
}
if ( ! is_string( $value ) ) {
return;
}
$this->{$new_name} = array( $value );
}
/**
* Renders the block type output for given attributes.
*
* @since 5.0.0
*
* @param array $attributes Optional. Block attributes. Default empty array.
* @param string $content Optional. Block content. Default empty string.
* @return string Rendered block type output.
*/
public function render( $attributes = array(), $content = '' ) {
if ( ! $this->is_dynamic() ) {
return '';
}
$attributes = $this->prepare_attributes_for_render( $attributes );
return (string) call_user_func( $this->render_callback, $attributes, $content );
}
/**
* Returns true if the block type is dynamic, or false otherwise. A dynamic
* block is one which defers its rendering to occur on-demand at runtime.
*
* @since 5.0.0
*
* @return bool Whether block type is dynamic.
*/
public function is_dynamic() {
return is_callable( $this->render_callback );
}
/**
* Validates attributes against the current block schema, populating
* defaulted and missing values.
*
* @since 5.0.0
*
* @param array $attributes Original block attributes.
* @return array Prepared block attributes.
*/
public function prepare_attributes_for_render( $attributes ) {
// If there are no attribute definitions for the block type, skip
// processing and return verbatim.
if ( ! isset( $this->attributes ) ) {
return $attributes;
}
foreach ( $attributes as $attribute_name => $value ) {
// If the attribute is not defined by the block type, it cannot be
// validated.
if ( ! isset( $this->attributes[ $attribute_name ] ) ) {
continue;
}
$schema = $this->attributes[ $attribute_name ];
// Validate value by JSON schema. An invalid value should revert to
// its default, if one exists. This occurs by virtue of the missing
// attributes loop immediately following. If there is not a default
// assigned, the attribute value should remain unset.
$is_valid = rest_validate_value_from_schema( $value, $schema, $attribute_name );
if ( is_wp_error( $is_valid ) ) {
unset( $attributes[ $attribute_name ] );
}
}
// Populate values of any missing attributes for which the block type
// defines a default.
$missing_schema_attributes = array_diff_key( $this->attributes, $attributes );
foreach ( $missing_schema_attributes as $attribute_name => $schema ) {
if ( isset( $schema['default'] ) ) {
$attributes[ $attribute_name ] = $schema['default'];
}
}
return $attributes;
}
/**
* Sets block type properties.
*
* @since 5.0.0
*
* @param array|string $args Array or string of arguments for registering a block type.
* See WP_Block_Type::__construct() for information on accepted arguments.
*/
public function set_props( $args ) {
$args = wp_parse_args(
$args,
array(
'render_callback' => null,
)
);
$args['name'] = $this->name;
// Setup attributes if needed.
if ( ! isset( $args['attributes'] ) || ! is_array( $args['attributes'] ) ) {
$args['attributes'] = array();
}
// Register core attributes.
foreach ( static::GLOBAL_ATTRIBUTES as $attr_key => $attr_schema ) {
if ( ! array_key_exists( $attr_key, $args['attributes'] ) ) {
$args['attributes'][ $attr_key ] = $attr_schema;
}
}
/**
* Filters the arguments for registering a block type.
*
* @since 5.5.0
*
* @param array $args Array of arguments for registering a block type.
* @param string $block_type Block type name including namespace.
*/
$args = apply_filters( 'register_block_type_args', $args, $this->name );
foreach ( $args as $property_name => $property_value ) {
$this->$property_name = $property_value;
}
}
/**
* Get all available block attributes including possible layout attribute from Columns block.
*
* @since 5.0.0
*
* @return array Array of attributes.
*/
public function get_attributes() {
return is_array( $this->attributes ) ?
$this->attributes :
array();
}
/**
* Get block variations.
*
* @since 6.5.0
*
* @return array[]
*/
public function get_variations() {
if ( ! isset( $this->variations ) ) {
$this->variations = array();
if ( is_callable( $this->variation_callback ) ) {
$this->variations = call_user_func( $this->variation_callback );
}
}
/**
* Filters the registered variations for a block type.
*
* @since 6.5.0
*
* @param array $variations Array of registered variations for a block type.
* @param WP_Block_Type $block_type The full block type object.
*/
return apply_filters( 'get_block_type_variations', $this->variations, $this );
}
/**
* Get block uses context.
*
* @since 6.5.0
*
* @return string[]
*/
public function get_uses_context() {
/**
* Filters the registered uses context for a block type.
*
* @since 6.5.0
*
* @param string[] $uses_context Array of registered uses context for a block type.
* @param WP_Block_Type $block_type The full block type object.
*/
return apply_filters( 'get_block_type_uses_context', $this->uses_context, $this );
}
}
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