function color_library_info_alter

Implements hook_library_info_alter().

Replaces style sheets declared in libraries with color-altered style sheets.

File

core/modules/color/color.module, line 77

Code

function color_library_info_alter(&$libraries, $extension) {
    $themes = array_keys(\Drupal::service('theme_handler')->listInfo());
    if (in_array($extension, $themes)) {
        $color_paths = \Drupal::config('color.theme.' . $extension)->get('stylesheets');
        if (!empty($color_paths)) {
            foreach (array_keys($libraries) as $name) {
                if (isset($libraries[$name]['css'])) {
                    // Override stylesheets.
                    foreach ($libraries[$name]['css'] as $category => $css_assets) {
                        foreach ($css_assets as $path => $metadata) {
                            // Loop over the path array with recolored CSS files to find matching
                            // paths which could replace the non-recolored paths.
                            foreach ($color_paths as $color_path) {
                                // Color module currently requires unique file names to be used,
                                // which allows us to compare different file paths.
                                
                                /** @var \Drupal\Core\File\FileSystemInterface $file_system */
                                $file_system = \Drupal::service('file_system');
                                if ($file_system->basename($path) == $file_system->basename($color_path)) {
                                    // Replace the path to the new css file.
                                    // This keeps the order of the stylesheets intact.
                                    $index = array_search($path, array_keys($libraries[$name]['css'][$category]));
                                    $preceding_css_assets = array_slice($libraries[$name]['css'][$category], 0, $index);
                                    $succeeding_css_assets = array_slice($libraries[$name]['css'][$category], $index + 1);
                                    $libraries[$name]['css'][$category] = array_merge($preceding_css_assets, [
                                        $color_path => $metadata,
                                    ], $succeeding_css_assets);
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}