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Backports functionality added in Gutenberg in the following PRs: - https://github.com/WordPress/gutenberg/pull/21467 - https://github.com/WordPress/gutenberg/pull/21925 It's a few ideas related to block rendering and the provided block value, which is particularly impactful for work around block context. Props aduth, TimothyBJacobs, noisysocks, epiqueras, youknowriad, talldanwp, zebulan. Fixes #49926. Built from https://develop.svn.wordpress.org/trunk@48159 git-svn-id: http://core.svn.wordpress.org/trunk@47928 1a063a9b-81f0-0310-95a4-ce76da25c4cd
204 lines
4.4 KiB
PHP
204 lines
4.4 KiB
PHP
<?php
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/**
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* Blocks API: WP_Block_List class
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*
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* @package WordPress
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* @since 5.5.0
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*/
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/**
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* Class representing a list of block instances.
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*
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* @since 5.5.0
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*/
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class WP_Block_List implements Iterator, ArrayAccess, Countable {
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/**
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* Original array of parsed block data, or block instances.
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*
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* @since 5.5.0
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* @var array[]|WP_Block[]
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* @access protected
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*/
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protected $blocks;
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/**
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* All available context of the current hierarchy.
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*
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* @since 5.5.0
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* @var array
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* @access protected
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*/
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protected $available_context;
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/**
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* Block type registry to use in constructing block instances.
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*
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* @since 5.5.0
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* @var WP_Block_Type_Registry
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* @access protected
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*/
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protected $registry;
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/**
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* Constructor.
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*
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* Populates object properties from the provided block instance argument.
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*
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* @since 5.5.0
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*
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* @param array[]|WP_Block[] $blocks Array of parsed block data, or block instances.
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* @param array $available_context Optional array of ancestry context values.
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* @param WP_Block_Type_Registry $registry Optional block type registry.
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*/
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public function __construct( $blocks, $available_context = array(), $registry = null ) {
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if ( ! $registry instanceof WP_Block_Type_Registry ) {
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$registry = WP_Block_Type_Registry::get_instance();
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}
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$this->blocks = $blocks;
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$this->available_context = $available_context;
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$this->registry = $registry;
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}
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/**
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* Returns true if a block exists by the specified block index, or false
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* otherwise.
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*
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* @since 5.5.0
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*
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* @link https://www.php.net/manual/en/arrayaccess.offsetexists.php
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*
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* @param string $index Index of block to check.
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* @return bool Whether block exists.
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*/
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public function offsetExists( $index ) {
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return isset( $this->blocks[ $index ] );
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}
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/**
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* Returns the value by the specified block index.
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*
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* @since 5.5.0
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*
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* @link https://www.php.net/manual/en/arrayaccess.offsetget.php
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*
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* @param string $index Index of block value to retrieve.
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* @return mixed|null Block value if exists, or null.
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*/
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public function offsetGet( $index ) {
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$block = $this->blocks[ $index ];
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if ( isset( $block ) && is_array( $block ) ) {
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$block = new WP_Block( $block, $this->available_context, $this->registry );
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$this->blocks[ $index ] = $block;
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}
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return $block;
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}
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/**
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* Assign a block value by the specified block index.
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*
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* @since 5.5.0
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*
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* @link https://www.php.net/manual/en/arrayaccess.offsetset.php
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*
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* @param string $index Index of block value to set.
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* @param mixed $value Block value.
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*/
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public function offsetSet( $index, $value ) {
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if ( is_null( $index ) ) {
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$this->blocks[] = $value;
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} else {
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$this->blocks[ $index ] = $value;
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}
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}
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/**
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* Unset a block.
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*
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* @since 5.5.0
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*
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* @link https://www.php.net/manual/en/arrayaccess.offsetunset.php
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*
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* @param string $index Index of block value to unset.
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*/
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public function offsetUnset( $index ) {
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unset( $this->blocks[ $index ] );
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}
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/**
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* Rewinds back to the first element of the Iterator.
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*
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* @since 5.5.0
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*
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* @link https://www.php.net/manual/en/iterator.rewind.php
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*/
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public function rewind() {
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reset( $this->blocks );
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}
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/**
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* Returns the current element of the block list.
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*
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* @since 5.5.0
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*
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* @link https://www.php.net/manual/en/iterator.current.php
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*
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* @return mixed Current element.
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*/
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public function current() {
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return $this->offsetGet( $this->key() );
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}
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/**
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* Returns the key of the current element of the block list.
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*
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* @since 5.5.0
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*
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* @link https://www.php.net/manual/en/iterator.key.php
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*
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* @return mixed Key of the current element.
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*/
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public function key() {
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return key( $this->blocks );
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}
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/**
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* Moves the current position of the block list to the next element.
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*
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* @since 5.5.0
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*
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* @link https://www.php.net/manual/en/iterator.next.php
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*/
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public function next() {
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next( $this->blocks );
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}
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/**
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* Checks if current position is valid.
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*
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* @since 5.5.0
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*
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* @link https://www.php.net/manual/en/iterator.valid.php
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*/
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public function valid() {
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return null !== key( $this->blocks );
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}
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/**
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* Returns the count of blocks in the list.
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*
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* @since 5.5.0
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*
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* @link https://www.php.net/manual/en/countable.count.php
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*
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* @return int Block count.
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*/
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public function count() {
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return count( $this->blocks );
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}
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}
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