/**
* {@inheritdoc}
*/
public function rebuildThemeData()
{
$listing = $this->getExtensionDiscovery();
$themes = $listing->scan('theme');
$engines = $listing->scan('theme_engine');
$extension_config = $this->configFactory->get('core.extension');
$installed = $extension_config->get('theme') ?: array();
// Set defaults for theme info.
$defaults = array('engine' => 'twig', 'regions' => array('sidebar_first' => 'Left sidebar', 'sidebar_second' => 'Right sidebar', 'content' => 'Content', 'header' => 'Header', 'primary_menu' => 'Primary menu', 'secondary_menu' => 'Secondary menu', 'footer' => 'Footer', 'highlighted' => 'Highlighted', 'messages' => 'Messages', 'help' => 'Help', 'page_top' => 'Page top', 'page_bottom' => 'Page bottom', 'breadcrumb' => 'Breadcrumb'), 'description' => '', 'features' => $this->defaultFeatures, 'screenshot' => 'screenshot.png', 'php' => DRUPAL_MINIMUM_PHP, 'libraries' => array());
$sub_themes = array();
$files = array();
// Read info files for each theme.
foreach ($themes as $key => $theme) {
// @todo Remove all code that relies on the $status property.
$theme->status = (int) isset($installed[$key]);
$theme->info = $this->infoParser->parse($theme->getPathname()) + $defaults;
// Add the info file modification time, so it becomes available for
// contributed modules to use for ordering theme lists.
$theme->info['mtime'] = $theme->getMTime();
// Invoke hook_system_info_alter() to give installed modules a chance to
// modify the data in the .info.yml files if necessary.
// @todo Remove $type argument, obsolete with $theme->getType().
$type = 'theme';
$this->moduleHandler->alter('system_info', $theme->info, $theme, $type);
if (!empty($theme->info['base theme'])) {
$sub_themes[] = $key;
// Add the base theme as a proper dependency.
$themes[$key]->info['dependencies'][] = $themes[$key]->info['base theme'];
}
// Defaults to 'twig' (see $defaults above).
$engine = $theme->info['engine'];
if (isset($engines[$engine])) {
$theme->owner = $engines[$engine]->getExtensionPathname();
$theme->prefix = $engines[$engine]->getName();
}
// Prefix screenshot with theme path.
if (!empty($theme->info['screenshot'])) {
$theme->info['screenshot'] = $theme->getPath() . '/' . $theme->info['screenshot'];
}
$files[$key] = $theme->getPathname();
}
// Build dependencies.
// @todo Move into a generic ExtensionHandler base class.
// @see https://drupal.org/node/2208429
$themes = $this->moduleHandler->buildModuleDependencies($themes);
// Store filenames to allow system_list() and drupal_get_filename() to
// retrieve them without having to scan the filesystem.
$this->state->set('system.theme.files', $files);
// After establishing the full list of available themes, fill in data for
// sub-themes.
foreach ($sub_themes as $key) {
$sub_theme = $themes[$key];
// The $base_themes property is optional; only set for sub themes.
// @see ThemeHandlerInterface::listInfo()
$sub_theme->base_themes = $this->getBaseThemes($themes, $key);
// empty() cannot be used here, since ThemeHandler::doGetBaseThemes() adds
// the key of a base theme with a value of NULL in case it is not found,
// in order to prevent needless iterations.
if (!current($sub_theme->base_themes)) {
continue;
}
// Determine the root base theme.
$root_key = key($sub_theme->base_themes);
// Build the list of sub-themes for each of the theme's base themes.
foreach (array_keys($sub_theme->base_themes) as $base_theme) {
$themes[$base_theme]->sub_themes[$key] = $sub_theme->info['name'];
}
// Add the theme engine info from the root base theme.
if (isset($themes[$root_key]->owner)) {
$sub_theme->info['engine'] = $themes[$root_key]->info['engine'];
$sub_theme->owner = $themes[$root_key]->owner;
$sub_theme->prefix = $themes[$root_key]->prefix;
}
}
return $themes;
}
