GutenbergFilter.php in Gutenberg 8.2

Namespace

Drupal\gutenberg\Plugin\Filter

File

src/Plugin/Filter/GutenbergFilter.php

<?php

namespace Drupal\gutenberg\Plugin\Filter;

use Drupal\Component\Utility\Html;
use Drupal\Core\Cache\RefinableCacheableDependencyInterface;
use Drupal\Core\Config\ConfigFactoryInterface;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
use Drupal\Core\Render\BubbleableMetadata;
use Drupal\filter\FilterProcessResult;
use Drupal\filter\Plugin\FilterBase;
use Drupal\gutenberg\BlockProcessor\GutenbergConfigurableBlockProcessorInterface;
use Drupal\gutenberg\BlockProcessor\GutenbergBlockProcessorManager;
use Drupal\gutenberg\GutenbergLibraryManagerInterface;
use Drupal\gutenberg\Parser\BlockParser;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Provides a filter for Gutenberg blocks.
 *
 * @Filter(
 *   id = "gutenberg",
 *   title = @Translation("Gutenberg"),
 *   description = @Translation("Compulsory filter in order to work with Gutenberg formats."),
 *   type = Drupal\filter\Plugin\FilterInterface::TYPE_TRANSFORM_REVERSIBLE,
 *   settings = {
 *    "processor_settings" = {},
 *   }
 * )
 */
class GutenbergFilter extends FilterBase implements ContainerFactoryPluginInterface {

  /**
   * The Gutenberg block processor manager.
   *
   * @var \Drupal\gutenberg\BlockProcessor\GutenbergBlockProcessorManager
   */
  protected $blockProcessorManager;

  /**
   * The Gutenberg library manager.
   *
   * @var \Drupal\gutenberg\GutenbergLibraryManagerInterface
   */
  protected $libraryManager;

  /**
   * The configuration factory.
   *
   * @var \Drupal\Core\Config\ConfigFactoryInterface
   */
  protected $configFactory;

  /**
   * Constructs a GutenbergFilter object.
   *
   * @param array $configuration
   *   A configuration array containing information about the plugin instance.
   * @param string $plugin_id
   *   The plugin_id for the plugin instance.
   * @param mixed $plugin_definition
   *   The plugin implementation definition.
   * @param \Drupal\gutenberg\BlockProcessor\GutenbergBlockProcessorManager $block_processor_manager
   *   The block processor manager instance.
   * @param \Drupal\gutenberg\GutenbergLibraryManagerInterface $library_manager
   *   The library manager instance.
   * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
   *   The configuration factory.
   */
  public function __construct(array $configuration, $plugin_id, $plugin_definition, GutenbergBlockProcessorManager $block_processor_manager, GutenbergLibraryManagerInterface $library_manager, ConfigFactoryInterface $config_factory) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);
    $this->blockProcessorManager = $block_processor_manager;
    $this->libraryManager = $library_manager;
    $this->configFactory = $config_factory;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
    return new static($configuration, $plugin_id, $plugin_definition, $container
      ->get('gutenberg.block_processor_manager'), $container
      ->get('plugin.manager.gutenberg.library'), $container
      ->get('config.factory'));
  }

  /**
   * {@inheritdoc}
   *
   * @see https://github.com/WordPress/gutenberg/blob/master/post-content.php
   */
  public function process($text, $langcode) {
    $result = new FilterProcessResult($text);
    $this
      ->setProviderSettings();

    // Use a bubbleable metadata.
    $bubbleable_metadata = new BubbleableMetadata();
    $block_parser = new BlockParser();
    $blocks = $block_parser
      ->parse($text);
    $output = '';
    foreach ($blocks as $block) {
      $output .= $this
        ->renderBlock($block, $bubbleable_metadata);
    }
    $result
      ->setProcessedText($output);

    // Add the module/theme libraries.
    $this
      ->addAttachments($result);

    // Add the processed blocks bubbleable metadata.
    $result
      ->addCacheableDependency($bubbleable_metadata);
    return $result;
  }

  /**
   * {@inheritdoc}
   */
  public function settingsForm(array $form, FormStateInterface $form_state) {
    $processors_settings = [];
    $this
      ->setProviderSettings();
    $processors = $this->blockProcessorManager
      ->getSortedProcessors();
    foreach ($processors as $processor) {
      if ($processor instanceof GutenbergConfigurableBlockProcessorInterface) {
        $processors_settings += $processor
          ->provideSettings($form, $form_state);
      }
    }
    if ($processors_settings) {
      $form['processor_settings'] = $processors_settings;
      return $form;
    }

    // Empty array to signify that there is no configuration.
    return [];
  }

  /**
   * {@inheritdoc}
   */
  public function defaultConfiguration() {
    $default_configuration = parent::defaultConfiguration();
    $processors = $this->blockProcessorManager
      ->getSortedProcessors();
    foreach ($processors as $processor) {
      if ($processor instanceof GutenbergConfigurableBlockProcessorInterface) {
        $default_configuration['settings']['processor_settings'] += $processor
          ->defaultConfiguration();
      }
    }
    return $default_configuration;
  }

  /**
   * Render a Gutenberg block.
   *
   * @param array $block
   *   The Gutenberg block.
   * @param \Drupal\Core\Cache\RefinableCacheableDependencyInterface $bubbleable_metadata
   *   The bubbleable metadata.
   *
   * @return string
   *   The block content.
   */
  protected function renderBlock(array $block, RefinableCacheableDependencyInterface $bubbleable_metadata) {
    $index = 0;
    $block_content = '';
    foreach ($block['innerContent'] as $chunk) {
      if (is_string($chunk)) {
        $block_content .= $chunk;
      }
      else {
        $block_content .= $this
          ->renderBlock($block['innerBlocks'][$index++], $bubbleable_metadata);
      }
    }
    $processors = $this->blockProcessorManager
      ->getSortedProcessors();
    foreach ($processors as $processor) {
      if ($processor
        ->isSupported($block, $block_content)) {
        $result = $processor
          ->processBlock($block, $block_content, $bubbleable_metadata);
        if ($result === FALSE) {

          // Stop further processing of the block.
          break;
        }
      }
    }
    return $block_content;
  }

  /**
   * Attach Gutenberg frontend libraries to the result.
   *
   * @param \Drupal\filter\FilterProcessResult $result
   *   The resulting markup.
   */
  protected function addAttachments(FilterProcessResult $result) {
    $module_definitions = $this->libraryManager
      ->getModuleDefinitions();
    $attachments = [];
    foreach ($module_definitions as $module_definition) {
      foreach ($module_definition['libraries-view'] as $library) {
        $attachments['library'][] = $library;
      }
    }
    $theme_definition = $this->libraryManager
      ->getActiveThemeMergedDefinition();
    foreach ($theme_definition['libraries-view'] as $library) {
      $attachments['library'][] = $library;
    }
    $default_theme = $this->configFactory
      ->get('system.theme')
      ->get('default');
    if ($default_theme === 'bartik') {
      $attachments['library'][] = 'gutenberg/bartik';
    }
    if ($attachments) {

      // Add the frontend attachments.
      $result
        ->addAttachments($attachments);
    }
  }

  /**
   * Set the current provider settings.
   */
  protected function setProviderSettings() {
    $processors = $this->blockProcessorManager
      ->getSortedProcessors();
    foreach ($processors as $processor) {
      if ($processor instanceof GutenbergConfigurableBlockProcessorInterface) {
        $processor
          ->setSettings($this->settings['processor_settings'] + $processor
          ->defaultConfiguration());
      }
    }
  }

  /**
   * {@inheritDoc}
   */
  public function tips($long = FALSE) {
    if ($long) {
      return $this
        ->t('Displays and renders Gutenberg HTML markup. The Gutenberg HTML attribute comments are automatically stripped.');
    }
    return $this
      ->t('Displays and renders Gutenberg HTML markup.');
  }

}

Classes

Name	Description
GutenbergFilter	Provides a filter for Gutenberg blocks.