/**
* Preprocess theme hook variables.
*
* @param array $variables
* The variables array, passed by reference.
* @param string $hook
* The name of the theme hook.
* @param array $info
* The theme hook info.
*/
public static function preprocess(array &$variables, $hook, array $info)
{
static $theme;
if (!isset($theme)) {
$theme = self::getTheme();
}
static $preprocess_manager;
if (!isset($preprocess_manager)) {
$preprocess_manager = new PreprocessManager($theme);
}
// Ensure that any default theme hook variables exist. Due to how theme
// hook suggestion alters work, the variables provided are from the
// original theme hook, not the suggestion.
if (isset($info['variables'])) {
$variables = NestedArray::mergeDeepArray([$info['variables'], $variables], TRUE);
}
// Add extra variables to all theme hooks.
foreach (Materialize::extraVariables() as $key => $value) {
if (!isset($variables[$key])) {
$variables[$key] = $value;
}
}
// Add active theme context.
// @see https://www.drupal.org/node/2630870
if (!isset($variables['theme'])) {
$variables['theme'] = $theme->getInfo();
$variables['theme']['name'] = $theme->getName();
$variables['theme']['path'] = $theme->getPath();
$variables['theme']['title'] = $theme->getTitle();
$variables['theme']['settings'] = $theme->settings()->get();
}
// Invoke necessary preprocess plugin.
if (isset($info['bootstrap preprocess'])) {
if ($preprocess_manager->hasDefinition($info['bootstrap preprocess'])) {
$class = $preprocess_manager->createInstance($info['bootstrap preprocess'], ['theme' => $theme]);
/** @var \Drupal\bootstrap\Plugin\Preprocess\PreprocessInterface $class */
$class->preprocess($variables, $hook, $info);
}
}
}
