364 lines
8.9 KiB
PHP
364 lines
8.9 KiB
PHP
<?php
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/**
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* Blocks API: WP_Block_Type class
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*
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* @package WordPress
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* @subpackage Blocks
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* @since 5.0.0
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*/
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/**
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* Core class representing a block type.
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*
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* @since 5.0.0
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*
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* @see register_block_type()
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*/
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class WP_Block_Type {
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/**
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* Block API version.
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*
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* @since 5.6.0
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* @var int
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*/
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public $api_version = 1;
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/**
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* Block type key.
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*
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* @since 5.0.0
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* @var string
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*/
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public $name;
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/**
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* Human-readable block type label.
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*
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* @since 5.5.0
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* @var string
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*/
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public $title = '';
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/**
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* Block type category classification, used in search interfaces
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* to arrange block types by category.
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*
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* @since 5.5.0
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* @var string|null
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*/
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public $category = null;
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/**
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* Setting parent lets a block require that it is only available
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* when nested within the specified blocks.
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*
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* @since 5.5.0
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* @var array|null
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*/
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public $parent = null;
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/**
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* Block type icon.
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*
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* @since 5.5.0
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* @var string|null
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*/
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public $icon = null;
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/**
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* A detailed block type description.
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*
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* @since 5.5.0
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* @var string
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*/
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public $description = '';
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/**
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* Additional keywords to produce block type as result
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* in search interfaces.
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*
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* @since 5.5.0
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* @var array
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*/
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public $keywords = array();
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/**
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* The translation textdomain.
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*
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* @since 5.5.0
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* @var string|null
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*/
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public $textdomain = null;
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/**
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* Alternative block styles.
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*
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* @since 5.5.0
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* @var array
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*/
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public $styles = array();
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/**
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* Block variations.
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*
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* @since 5.8.0
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* @var array
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*/
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public $variations = array();
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/**
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* Supported features.
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*
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* @since 5.5.0
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* @var array|null
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*/
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public $supports = null;
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/**
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* Structured data for the block preview.
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*
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* @since 5.5.0
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* @var array|null
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*/
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public $example = null;
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/**
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* Block type render callback.
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*
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* @since 5.0.0
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* @var callable
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*/
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public $render_callback = null;
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/**
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* Block type attributes property schemas.
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*
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* @since 5.0.0
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* @var array|null
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*/
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public $attributes = null;
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/**
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* Context values inherited by blocks of this type.
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*
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* @since 5.5.0
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* @var array
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*/
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public $uses_context = array();
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/**
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* Context provided by blocks of this type.
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*
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* @since 5.5.0
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* @var array|null
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*/
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public $provides_context = null;
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/**
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* Block type editor script handle.
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*
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* @since 5.0.0
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* @var string|null
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*/
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public $editor_script = null;
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/**
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* Block type front end script handle.
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*
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* @since 5.0.0
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* @var string|null
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*/
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public $script = null;
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/**
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* Block type editor style handle.
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*
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* @since 5.0.0
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* @var string|null
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*/
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public $editor_style = null;
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/**
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* Block type front end style handle.
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*
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* @since 5.0.0
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* @var string|null
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*/
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public $style = null;
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/**
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* Constructor.
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*
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* Will populate object properties from the provided arguments.
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*
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* @since 5.0.0
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* @since 5.5.0 Added the `title`, `category`, `parent`, `icon`, `description`,
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* `keywords`, `textdomain`, `styles`, `supports`, `example`,
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* `uses_context`, and `provides_context` properties.
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* @since 5.6.0 Added the `api_version` property.
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* @since 5.8.0 Added the `variations` property.
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*
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* @see register_block_type()
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*
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* @param string $block_type Block type name including namespace.
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* @param array|string $args {
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* Optional. Array or string of arguments for registering a block type. Any arguments may be defined,
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* however the ones described below are supported by default. Default empty array.
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*
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* @type string $api_version Block API version.
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* @type string $title Human-readable block type label.
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* @type string|null $category Block type category classification, used in
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* search interfaces to arrange block types by category.
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* @type array|null $parent Setting parent lets a block require that it is only
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* available when nested within the specified blocks.
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* @type string|null $icon Block type icon.
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* @type string $description A detailed block type description.
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* @type array $keywords Additional keywords to produce block type as
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* result in search interfaces.
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* @type string|null $textdomain The translation textdomain.
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* @type array $styles Alternative block styles.
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* @type array $variations Block variations.
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* @type array|null $supports Supported features.
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* @type array|null $example Structured data for the block preview.
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* @type callable|null $render_callback Block type render callback.
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* @type array|null $attributes Block type attributes property schemas.
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* @type array $uses_context Context values inherited by blocks of this type.
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* @type array|null $provides_context Context provided by blocks of this type.
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* @type string|null $editor_script Block type editor script handle.
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* @type string|null $script Block type front end script handle.
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* @type string|null $editor_style Block type editor style handle.
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* @type string|null $style Block type front end style handle.
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* }
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*/
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public function __construct( $block_type, $args = array() ) {
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$this->name = $block_type;
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$this->set_props( $args );
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}
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/**
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* Renders the block type output for given attributes.
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*
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* @since 5.0.0
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*
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* @param array $attributes Optional. Block attributes. Default empty array.
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* @param string $content Optional. Block content. Default empty string.
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* @return string Rendered block type output.
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*/
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public function render( $attributes = array(), $content = '' ) {
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if ( ! $this->is_dynamic() ) {
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return '';
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}
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$attributes = $this->prepare_attributes_for_render( $attributes );
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return (string) call_user_func( $this->render_callback, $attributes, $content );
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}
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/**
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* Returns true if the block type is dynamic, or false otherwise. A dynamic
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* block is one which defers its rendering to occur on-demand at runtime.
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*
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* @since 5.0.0
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*
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* @return bool Whether block type is dynamic.
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*/
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public function is_dynamic() {
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return is_callable( $this->render_callback );
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}
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/**
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* Validates attributes against the current block schema, populating
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* defaulted and missing values.
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*
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* @since 5.0.0
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*
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* @param array $attributes Original block attributes.
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* @return array Prepared block attributes.
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*/
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public function prepare_attributes_for_render( $attributes ) {
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// If there are no attribute definitions for the block type, skip
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// processing and return verbatim.
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if ( ! isset( $this->attributes ) ) {
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return $attributes;
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}
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foreach ( $attributes as $attribute_name => $value ) {
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// If the attribute is not defined by the block type, it cannot be
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// validated.
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if ( ! isset( $this->attributes[ $attribute_name ] ) ) {
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continue;
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}
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$schema = $this->attributes[ $attribute_name ];
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// Validate value by JSON schema. An invalid value should revert to
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// its default, if one exists. This occurs by virtue of the missing
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// attributes loop immediately following. If there is not a default
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// assigned, the attribute value should remain unset.
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$is_valid = rest_validate_value_from_schema( $value, $schema, $attribute_name );
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if ( is_wp_error( $is_valid ) ) {
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unset( $attributes[ $attribute_name ] );
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}
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}
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// Populate values of any missing attributes for which the block type
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// defines a default.
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$missing_schema_attributes = array_diff_key( $this->attributes, $attributes );
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foreach ( $missing_schema_attributes as $attribute_name => $schema ) {
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if ( isset( $schema['default'] ) ) {
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$attributes[ $attribute_name ] = $schema['default'];
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}
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}
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return $attributes;
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}
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/**
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* Sets block type properties.
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*
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* @since 5.0.0
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*
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* @param array|string $args Array or string of arguments for registering a block type.
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* See WP_Block_Type::__construct() for information on accepted arguments.
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*/
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public function set_props( $args ) {
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$args = wp_parse_args(
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$args,
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array(
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'render_callback' => null,
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)
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);
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$args['name'] = $this->name;
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/**
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* Filters the arguments for registering a block type.
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*
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* @since 5.5.0
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*
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* @param array $args Array of arguments for registering a block type.
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* @param string $block_type Block type name including namespace.
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*/
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$args = apply_filters( 'register_block_type_args', $args, $this->name );
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foreach ( $args as $property_name => $property_value ) {
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$this->$property_name = $property_value;
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}
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}
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/**
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* Get all available block attributes including possible layout attribute from Columns block.
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*
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* @since 5.0.0
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*
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* @return array Array of attributes.
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*/
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public function get_attributes() {
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return is_array( $this->attributes ) ?
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$this->attributes :
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array();
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}
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}
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