Same name and namespace in other branches

1. 11.x core/lib/Drupal/Core/Asset/CssCollectionOptimizerLazy.php \Drupal\Core\Asset\CssCollectionOptimizerLazy::optimize()

Optimizes a collection of assets.

Parameters

array $assets: An asset collection.

array $libraries: An array of library names.

Return value

array An optimized asset collection.

Overrides AssetCollectionOptimizerInterface::optimize

File

core/lib/Drupal/Core/Asset/CssCollectionOptimizerLazy.php, line 61

Class

CssCollectionOptimizerLazy

Optimizes CSS assets.

Namespace

Drupal\Core\Asset

Code

public function optimize(array $css_assets, array $libraries) {
  // File names are generated based on library/asset definitions. This
  // includes a hash of the assets and the group index. Additionally, the full
  // set of libraries, already loaded libraries and theme are sent as query
  // parameters to allow a PHP controller to generate a valid file with
  // sufficient information. Files are not generated by this method since
  // they're assumed to be successfully returned from the URL created whether
  // on disk or not.
  // Group the assets.
  $css_groups = $this->grouper
    ->group($css_assets);
  $css_assets = [];
  foreach ($css_groups as $order => $css_group) {
    // We have to return a single asset, not a group of assets. It is now up
    // to one of the pieces of code in the switch statement below to set the
    // 'data' property to the appropriate value.
    $css_assets[$order] = $css_group;
    if ($css_group['type'] === 'file') {
      // No preprocessing, single CSS asset: just use the existing URI.
      if (!$css_group['preprocess']) {
        $uri = $css_group['items'][0]['data'];
        $css_assets[$order]['data'] = $uri;
      }
      else {
        // To reproduce the full context of assets outside of the request,
        // we must know the entire set of libraries used to generate all CSS
        // groups, whether or not files in a group are from a particular
        // library or not.
        $css_assets[$order]['preprocessed'] = TRUE;
      }
    }
    if ($css_group['type'] === 'external') {
      // We don't do any aggregation and hence also no caching for external
      // CSS assets.
      $uri = $css_group['items'][0]['data'];
      $css_assets[$order]['data'] = $uri;
    }
  }
  // All asset group URLs will have exactly the same query arguments, except
  // for the delta, so prepare them in advance.
  $query_args = [
    'language' => $this->languageManager
      ->getCurrentLanguage()
      ->getId(),
    'theme' => $this->themeManager
      ->getActiveTheme()
      ->getName(),
    'include' => UrlHelper::compressQueryParameter(implode(',', $this->dependencyResolver
      ->getMinimalRepresentativeSubset($libraries))),
  ];
  $ajax_page_state = $this->requestStack
    ->getCurrentRequest()
    ->get('ajax_page_state');
  $already_loaded = isset($ajax_page_state) ? explode(',', $ajax_page_state['libraries']) : [];
  if ($already_loaded) {
    $query_args['exclude'] = UrlHelper::compressQueryParameter(implode(',', $this->dependencyResolver
      ->getMinimalRepresentativeSubset($already_loaded)));
  }
  // Generate a URL for each group of assets, but do not process them inline,
  // this is done using optimizeGroup() when the asset path is requested.
  foreach ($css_assets as $order => $css_asset) {
    if (!empty($css_asset['preprocessed'])) {
      $query = [
        'delta' => "{$order}",
      ] + $query_args;
      $filename = 'css_' . $this->generateHash($css_asset) . '.css';
      $uri = 'assets://css/' . $filename;
      $css_assets[$order]['data'] = $this->fileUrlGenerator
        ->generateString($uri) . '?' . UrlHelper::buildQuery($query);
    }
    unset($css_assets[$order]['items']);
  }
  return $css_assets;
}

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