public function LayoutPluginManager::alterThemeImplementations in Layout Plugin (obsolete, use core's Layout Discovery) 8

Modifies the theme implementations for the layouts that we registered.

Parameters

array &$theme_registry: An associative array of the same format as passed to hook_theme_registry_alter().

Overrides LayoutPluginManagerInterface::alterThemeImplementations

See also

hook_theme_registry_alter()

File

src/Plugin/Layout/LayoutPluginManager.php, line 177

Class

LayoutPluginManager

Plugin type manager for all layouts.

Namespace

Drupal\layout_plugin\Plugin\Layout

Code

public function alterThemeImplementations(array &$theme_registry) {
  $plugins = $this
    ->getDefinitions();

  // Find all the theme hooks which are for automatically registered templates
  // (we ignore manually set theme hooks because we don't know how they were
  // registered).
  $layout_theme_hooks = [];
  foreach ($plugins as $id => $definition) {
    if (!empty($definition['template']) && !empty($definition['theme']) && isset($theme_registry[$definition['theme']])) {
      $layout_theme_hooks[] = $definition['theme'];
    }
  }

  // Go through the theme registry looking for our theme hooks and any
  // suggestions based on them.
  foreach ($theme_registry as $theme_hook => &$info) {
    if (in_array($theme_hook, $layout_theme_hooks) || !empty($info['base hook']) && in_array($info['base hook'], $layout_theme_hooks)) {

      // If 'template_preprocess' is included, we want to put our preprocess
      // after to not mess up the expectation that 'template_process' always
      // runs first.
      if (($index = array_search('template_preprocess', $info['preprocess functions'])) !== FALSE) {
        $index++;
      }
      else {

        // Otherwise, put our preprocess function first.
        $index = 0;
      }
      array_splice($info['preprocess functions'], $index, 0, '_layout_plugin_preprocess_layout');
    }
  }
}