function AttributeClassDiscovery::getPluginNamespaces

Overrides AttributeClassDiscovery::getPluginNamespaces

File

core/lib/Drupal/Core/Plugin/Discovery/AttributeClassDiscovery.php, line 95

Class

AttributeClassDiscovery

Defines a discovery mechanism to find plugins using attributes.

Namespace

Code

protected function getPluginNamespaces() : array {
    $plugin_namespaces = [];
    if ($this->namespaceSuffix) {
        foreach ($this->rootNamespacesIterator as $namespace => $dirs) {
            // Append the namespace suffix to the base namespace, to obtain the
            // plugin namespace; for example, 'Drupal\views' may become
            // 'Drupal\views\Plugin\Block'.
            $namespace .= $this->namespaceSuffix;
            foreach ((array) $dirs as $dir) {
                // Append the directory suffix to the PSR-4 base directory, to obtain
                // the directory where plugins are found. For example,
                // DRUPAL_ROOT . '/core/modules/views/src' may become
                // DRUPAL_ROOT . '/core/modules/views/src/Plugin/Block'.
                $plugin_namespaces[$namespace][] = $dir . $this->directorySuffix;
            }
        }
    }
    else {
        // Both the namespace suffix and the directory suffix are empty,
        // so the plugin namespaces and directories are the same as the base
        // directories.
        foreach ($this->rootNamespacesIterator as $namespace => $dirs) {
            $plugin_namespaces[$namespace] = (array) $dirs;
        }
    }
    return $plugin_namespaces;
}