manage_display_fix_title.module in Manage display 8

Workaround for core bugs in display of entity title.

File

modules/manage_display_fix_title/manage_display_fix_title.module

<?php

/**
 * @file
 * Workaround for core bugs in display of entity title.
 */

// EntityViewController::buildTitle creates problems,
// see https://www.drupal.org/node/2941208. It runs as a pre_render hook with
// apparently no way to alter it (see comment below for explanation). Solution
// found is to override the controller for the relevant routes using a route
// enhancer service.
//
// Sequence of events.
// 1) Building
// - EntityViewController::view
// - EntityViewBuilder::view
// - hook_entity_build_defaults_alter: can add OWN_entity_pre_render but Core
//   pre_render not available to alter
// 2) Rendering
// - pre_render
//   - OWN_entity_pre_render:
//     - too late to alter Core pre_render; no built fields to hook
//   - EntityViewBuilder::build
//     - hook_entity_view_display_alter: ideal place, except can't detect
//       whether the entity is on its own page
//     - hook_entity_prepare_view: no good as it acts on entities
//     - EntityViewDisplay::buildMultiple formatter builds the output,
//       so after this it's too late to swap to a different formatter
//     - hook_entity_display_build_alter
//     - hook_entity_view, hook_entity_view_alter
//   - EntityViewController::buildTitle
//     - title field: #pre_render, template_preprocess_field,
//       hook_preprocess_field
// - preprocess
//   - node: #pre_render, template_preprocess_node, hook_preprocess_node
//   - field: #pre_render, template_preprocess_field, hook_preprocess_field.

/**
 * Implements hook_theme().
 */
function manage_display_fix_title_theme() {
  return [
    'entity_page_title' => [
      'variables' => [
        'attributes' => [],
        'title' => NULL,
        'entity' => NULL,
        'view_mode' => NULL,
      ],
    ],
  ];
}

/**
 * Implements hook_preprocess_HOOK() for entity_page_title.
 *
 * On behalf of quickedit.module.
 */
function manage_display_fix_title_preprocess_entity_page_title(&$variables) {
  $variables['#cache']['contexts'][] = 'user.permissions';
  $entity = $variables['entity'];
  if (!\Drupal::currentUser()
    ->hasPermission('access in-place editing') || !$entity
    ->isLatestRevision()) {
    return;
  }
  $label_field = $entity
    ->getEntityType()
    ->getKey('label');
  $variables['attributes']['data-quickedit-field-id'] = $entity
    ->getEntityTypeId() . '/' . $entity
    ->id() . '/' . $label_field . '/' . $entity
    ->language()
    ->getId() . '/' . $variables['view_mode'];
}

Functions

Name	Description
manage_display_fix_title_preprocess_entity_page_title	Implements hook_preprocess_HOOK() for entity_page_title.
manage_display_fix_title_theme	Implements hook_theme().