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<?php
namespace Drupal\Core\Extension;
use Drupal\Core\Config\ConfigFactoryInterface;
use Drupal\Core\Extension\Exception\UnknownExtensionException;
/**
* Default theme handler using the config system to store installation statuses.
*/
class ThemeHandler implements ThemeHandlerInterface {
/**
* A list of all currently available themes.
*
* @var array
*/
protected $list;
/**
* The config factory to get the installed themes.
*
* @var \Drupal\Core\Config\ConfigFactoryInterface
*/
protected $configFactory;
/**
* An extension discovery instance.
*
* @var \Drupal\Core\Extension\ThemeExtensionList
*/
protected $themeList;
/**
* The app root.
*
* @var string
*/
protected $root;
/**
* Constructs a new ThemeHandler.
*
* @param string $root
* The app root.
* @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
* The config factory to get the installed themes.
* @param \Drupal\Core\Extension\ThemeExtensionList $theme_list
* An extension discovery instance.
*/
public function __construct($root, ConfigFactoryInterface $config_factory, ThemeExtensionList $theme_list) {
$this->root = $root;
$this->configFactory = $config_factory;
$this->themeList = $theme_list;
}
/**
* {@inheritdoc}
*/
public function getDefault() {
return $this->configFactory->get('system.theme')->get('default');
}
/**
* {@inheritdoc}
*/
public function listInfo() {
if (!isset($this->list)) {
$this->list = [];
$installed_themes = array_keys($this->configFactory->get('core.extension')->get('theme'));
if (!empty($installed_themes)) {
$list = $this->themeList->getList();
foreach ($installed_themes as $theme) {
// Do not add installed themes that cannot be found by the
// extension.list.theme service. If a theme does go missing from the
// file system any call to ::getTheme() will result in an exception
// and an error being logged. Ignoring the problem here allows the
// theme system to fix itself while updating.
if (isset($list[$theme])) {
$this->addTheme($list[$theme]);
}
}
}
}
return $this->list;
}
/**
* {@inheritdoc}
*/
public function addTheme(Extension $theme) {
// Register the namespaces of installed themes.
// @todo Implement proper theme registration
// https://www.drupal.org/project/drupal/issues/2941757
\Drupal::service('class_loader')->addPsr4('Drupal\\' . $theme->getName() . '\\', $this->root . '/' . $theme->getPath() . '/src');
if (!empty($theme->info['libraries'])) {
foreach ($theme->info['libraries'] as $library => $name) {
$theme->libraries[$library] = $name;
}
}
if (isset($theme->info['engine'])) {
$theme->engine = $theme->info['engine'];
}
if (isset($theme->info['base theme'])) {
$theme->base_theme = $theme->info['base theme'];
}
$this->list[$theme->getName()] = $theme;
}
/**
* {@inheritdoc}
*/
public function refreshInfo() {
$installed = $this->configFactory->get('core.extension')->get('theme');
// Only refresh the info if a theme has been installed. Modules are
// installed before themes by the installer and this method is called during
// module installation.
if (empty($installed) && empty($this->list)) {
return;
}
$this->reset();
}
/**
* {@inheritdoc}
*/
public function reset() {
$this->themeList->reset();
$this->list = NULL;
}
/**
* {@inheritdoc}
*/
public function rebuildThemeData() {
@trigger_error("\Drupal\Core\Extension\ThemeHandlerInterface::rebuildThemeData() is deprecated in drupal:10.3.0 and is removed from drupal:12.0.0. Use \Drupal::service('extension.list.theme')->reset()->getList() instead. See https://www.drupal.org/node/3413196", E_USER_DEPRECATED);
return $this->themeList->reset()->getList();
}
/**
* {@inheritdoc}
*/
public function getBaseThemes(array $themes, $theme) {
@trigger_error("\Drupal\Core\Extension\ThemeHandlerInterface::getBaseThemes() is deprecated in drupal:10.3.0 and is removed from drupal:12.0.0. There is no direct replacement. See https://www.drupal.org/node/3413187", E_USER_DEPRECATED);
return $this->themeList->getBaseThemes($themes, $theme);
}
/**
* {@inheritdoc}
*/
public function getName($theme) {
return $this->themeList->getName($theme);
}
/**
* {@inheritdoc}
*/
public function getThemeDirectories() {
$dirs = [];
foreach ($this->listInfo() as $name => $theme) {
$dirs[$name] = $this->root . '/' . $theme->getPath();
}
return $dirs;
}
/**
* {@inheritdoc}
*/
public function themeExists($theme) {
$themes = $this->listInfo();
return isset($themes[$theme]);
}
/**
* {@inheritdoc}
*/
public function getTheme($name) {
$themes = $this->listInfo();
if (isset($themes[$name])) {
return $themes[$name];
}
throw new UnknownExtensionException(sprintf('The theme %s does not exist.', $name));
}
/**
* {@inheritdoc}
*/
public function hasUi($name) {
$themes = $this->listInfo();
if (isset($themes[$name])) {
if (!empty($themes[$name]->info['hidden'])) {
$theme_config = $this->configFactory->get('system.theme');
return $name == $theme_config->get('default') || $name == $theme_config->get('admin');
}
return TRUE;
}
return FALSE;
}
}
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