FieldBlock.php in Field as Block 8
Same filename in this branch
Same filename and directory in other branches
Namespace
Drupal\fieldblock\Plugin\BlockFile
src/Plugin/Block/FieldBlock.phpView source
<?php
/**
* @file
* Contains \Drupal\fieldblock\Plugin\Block\FieldBlock.
*/
namespace Drupal\fieldblock\Plugin\Block;
use Drupal\Core\Block\BlockBase;
/**
* Provides a fieldblock.
*
* @Block(
* id = "fieldblock",
* admin_label = @Translation("Fieldblock"),
* deriver = "Drupal\fieldblock\Plugin\Derivative\FieldBlock"
* )
*/
class FieldBlock extends BlockBase {
/**
* {@inheritdoc}
*/
public function build() {
$block_id = $this
->getDerivativeId();
$block = $this::getFieldBlock($block_id);
return $block;
}
/**
* @var array[]
* Static storage for fields that are grabbed from the entity's render
* array, to be retrieved when fieldblocks are built.
*/
protected static $fieldBlocks;
/**
* @param string $fieldblock_id
* The identifier of the fieldblock.
* @return mixed[]|false
* The render array of the field that is published as block or false if the
* field is not available.
*/
public static function getFieldBlock($fieldblock_id) {
if (isset(self::$fieldBlocks[$fieldblock_id])) {
return self::$fieldBlocks[$fieldblock_id];
}
else {
return FALSE;
}
}
/**
* @param string $fieldblock_id
* The identifier of the fieldblock.
* @param mixed[] $render_array
* The render array of the field that will be published as block.
*/
public static function setFieldBlock($fieldblock_id, array $render_array) {
self::$fieldBlocks[$fieldblock_id] = $render_array;
}
/**
* #post_render_cache callback, temporarily stores a field's render array in a
* static variable and returns the original element as post render cache
* callbacks are supposed to do.
*
* Note that this is an atypical way to use the post render cache mechanism.
* Post render cache is meant to allow modules to dynamically alter pieces of
* cached content. Here we use it as some kind of context-aware cache, because
* the cached field will only be retrieved and displayed as a block when the
* entity is viewed.
*
* @param mixed[] $element
* The render array being rendered.
* @param mixed[] $context
* Array containing the fieldblock ID and the field's render array.
* @return mixed[]
* The render array being rendered.
*/
public static function fieldBlockPostRenderCache(array $element, array $context) {
self::setFieldBlock($context['fieldblock_id'], $context['build']);
return $element;
}
}
Classes
Name![]() |
Description |
---|---|
FieldBlock | Provides a fieldblock. |