尝试在图书模块图书树块的主题建议中返回区域

Question

基于@NoSssweat的信息编辑问题

图书模块对图书树块和图书页中呈现的索引视图使用相同的钩子。

我使用了下面的代码来返回文件名建议，这样我就可以覆盖特定区域的图书树块的html输出--“侧栏优先”。我希望下面的代码会显示出类似于book-tree--book-toc-180--sidebar-first.html.twig的内容。相反，它只是提出了一个已经被建议的文件名建议：

此文件名建议与图书页上的主要内容相同。如何针对sidebar-first区域内的任何图书树块？

// Add a region variable to a block.
// http://kristiankaa.dk/article/drupal8-region-specific-menu-theme-hook-suggestion
function uswds_subtheme_preprocess_book_tree__book_toc_180(&$variables) {
    if (isset($variables["elements"]["#id"])) {
        $block_id = $variables["elements"]["#id"];
        $block = \Drupal\block\Entity\Block::load($block_id);

        if ($block) {
            $variables["content"]["#attributes"]["region"] = $block->getRegion();
        }
    }
}

// add a template suggestion based on region name
// http://kristiankaa.dk/article/drupal8-region-specific-menu-theme-hook-suggestion
function uswds_subtheme_theme_suggestions_book_tree__book_toc_180_alter(array &$suggestions, array $variables) {
    if (isset($variables["attributes"]["region"])) {
        $suggestions[] = $variables["theme_hook_original"] . "__" . $variables["attributes"]["region"];
    }
}

2nd尝试我做了下面的工作，但它只适用于图书模块默认块，尽管任何其他图书模块块插件都主要使用book-tree.html.twig

// Add a region variable to a block.
function uswds_subtheme_preprocess_block(&$variables) {
  if (isset($variables["elements"]["#id"])) {
    $block_id = $variables["elements"]["#id"];
    $block = \Drupal\block\Entity\Block::load($block_id);

    if ($block) {
      $variables["content"]["#attributes"]["region"] = $block->getRegion();
    }
  }
}

// add a template suggestion based on region name
function uswds_subtheme_theme_suggestions_alter(array &$suggestions, array $variables, $hook) {
  if (isset($variables["attributes"]["region"])) {
    $suggestions[] = $variables["theme_hook_original"] . "__" . $variables["attributes"]["region"];
  }
}

Answer 1

或者我怎样才能在树枝上做一些事情，比如{% if region == 'sidebar-first' %}，然后重写booktree.html.twig

// Adds a region attribute to a block.
function uswds_subtheme_preprocess_block(&$variables) {
  if (isset($variables["elements"]["#id"])) {
    $block_id = $variables["elements"]["#id"];
    $block = \Drupal\block\Entity\Block::load($block_id);
    if ($block) {
      $variables["content"]["#attributes"]["region"] = $block->getRegion();
    }
  }
}

/**
 * Implements hook_preprocess_HOOK().
 *
 * Creates region variable
 *
 * Gets rid of the region attribute added in uswds_subtheme_preprocess_block() as it's
 * not a valid HTML attribute.
 */
function uswds_subtheme_preprocess_book_tree(&$variables) {
  if (isset($variables['attributes']['region'])) {
    // creates region variable for book-tree.html.twig
    $variables['region'] = $variables['attributes']['region'];
    // unset invalid html attribute.
    unset($variables['attributes']['region']);
  }
}

Answer 2

不错的尝试，因为这是一本书，而不是菜单，过程是相似的，但不完全一样。我希望你能搞清楚。

但不管怎样，给你：

/**
 * Implements hook_preprocess_HOOK().
 *
 * Pass block region value to content so this can be used in
 * uswds_subtheme_theme_suggestions_menu_alter() since $variables['elements']
 * is not available there.
 */
function uswds_subtheme_preprocess_block(&$variables) {
  if (isset($variables['elements']['#id']) && $variables['base_plugin_id'] === 'book_navigation') {
    $region = \Drupal\block\Entity\Block::load($variables['elements']['#id'])->getRegion();
    $content = $variables['content'];
    foreach ($content as $content_key => $content_info) {
      if (is_numeric($content_key)) {
        $variables['content'][$content_key]['#attributes']['region'] = $region;
      }
    }
  }
}

/**
 * Implements hook_theme_suggestions_HOOK_alter().
 *
 * Provide region based book suggestions.
 */
function uswds_subtheme_theme_suggestions_book_tree_alter(&$suggestions, array $variables) {
  if (isset($variables['attributes']['region'])) {
    $suggestion = 'book__' . $variables['theme_hook_original'] . '__' . $variables['attributes']['region'];
    $suggestion = str_replace('-', '_', $suggestion);
    $suggestions[] = $suggestion;
  }
}

/**
 * Implements hook_preprocess_HOOK().
 *
 * Get rid of the region attribute added in uswds_subtheme_preprocess_block() as it's
 * not a valid HTML attribute.
 */
function uswds_subtheme_preprocess_book_tree(&$variables) {
  if (isset($variables['attributes']['region'])) {
    unset($variables['attributes']['region']);
  }
}

Answer 3

使用@NoSssweat和我所提供的所有帮助就可以完成以下工作：

// Add a region variable to a block.
function uswds_subtheme_preprocess_block(&$variables) {
  if (isset($variables["elements"]["#id"])) {
    $block_id = $variables["elements"]["#id"];
    $block = \Drupal\block\Entity\Block::load($block_id);

    if ($block) {
      $variables["content"]["#attributes"]["region"] = $block->getRegion();
    }
  }
}

// add a template suggestion based on region name
function uswds_subtheme_theme_suggestions_alter(array &$suggestions, array $variables, $hook) {
  if (isset($variables["attributes"]["region"])) {
    $suggestions[] = $variables["theme_hook_original"] . "__" . $variables["attributes"]["region"];
  }
}

哪些产出(第二项建议，包括该区域)：

Update到工作版本：

getRegion();
      }
    }
  }

// Adds template suggestion to blocks. Seems to work everywhere, but doesn't target the book tree
function uswds_subtheme_theme_suggestions_block_alter(array &$suggestions, array $variables){
    if (!empty($variables['elements']['#id'])) {
        $block = \Drupal\block\Entity\Block::load($variables['elements']['#id']);
        $region = $block->getRegion();
        // adds suggestion with region and block id
        $suggestions[] = 'block__' . $region . '__' . $variables['elements']['#id'];
        // adds suggestion with region id
        $suggestions[] = 'block__' . $region;
    }
}


// add a template suggestion based on region name
function uswds_subtheme_theme_suggestions_alter(array &$suggestions, array $variables, $hook) {
  if (isset($variables["attributes"]["region"])) {
    $suggestions[] = $variables["theme_hook_original"] . "__" . $variables["attributes"]["region"];
  }
}