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class BreakpointManager in Drupal 8

Same name and namespace in other branches
  1. 9 core/modules/breakpoint/src/BreakpointManager.php \Drupal\breakpoint\BreakpointManager

Defines a breakpoint plugin manager to deal with breakpoints.

Extension can define breakpoints in a EXTENSION_NAME.breakpoints.yml file contained in the extension's base directory. Each breakpoint has the following structure:


  MACHINE_NAME:
    label: STRING
    mediaQuery: STRING
    weight: INTEGER
    multipliers:
      - STRING

For example:


bartik.mobile:
  label: mobile
  mediaQuery: '(min-width: 0px)'
  weight: 0
  multipliers:
    - 1x
    - 2x

Optionally a breakpoint can provide a group key. By default an extensions breakpoints will be placed in a group labelled with the extension name.

Hierarchy

Expanded class hierarchy of BreakpointManager

See also

\Drupal\breakpoint\Breakpoint

\Drupal\breakpoint\BreakpointInterface

Plugin API

1 string reference to 'BreakpointManager'
breakpoint.services.yml in core/modules/breakpoint/breakpoint.services.yml
core/modules/breakpoint/breakpoint.services.yml
1 service uses BreakpointManager
breakpoint.manager in core/modules/breakpoint/breakpoint.services.yml
Drupal\breakpoint\BreakpointManager

File

core/modules/breakpoint/src/BreakpointManager.php, line 47

Namespace

Drupal\breakpoint
View source 
class BreakpointManager extends DefaultPluginManager implements BreakpointManagerInterface {
  use StringTranslationTrait;

  /**
   * {@inheritdoc}
   */
  protected $defaults = [
    // Human readable label for breakpoint.
    'label' => '',
    // The media query for the breakpoint.
    'mediaQuery' => '',
    // Weight used for ordering breakpoints.
    'weight' => 0,
    // Breakpoint multipliers.
    'multipliers' => [],
    // The breakpoint group.
    'group' => '',
    // Default class for breakpoint implementations.
    'class' => 'Drupal\\breakpoint\\Breakpoint',
    // The plugin id. Set by the plugin system based on the top-level YAML key.
    'id' => '',
  ];

  /**
   * The theme handler.
   *
   * @var \Drupal\Core\Extension\ThemeHandlerInterface
   */
  protected $themeHandler;

  /**
   * Static cache of breakpoints keyed by group.
   *
   * @var array
   */
  protected $breakpointsByGroup;

  /**
   * The plugin instances.
   *
   * @var array
   */
  protected $instances = [];

  /**
   * Constructs a new BreakpointManager instance.
   *
   * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
   *   The module handler.
   * @param \Drupal\Core\Extension\ThemeHandlerInterface $theme_handler
   *   The theme handler.
   * @param \Drupal\Core\Cache\CacheBackendInterface $cache_backend
   *   The cache backend.
   * @param \Drupal\Core\StringTranslation\TranslationInterface $string_translation
   *   The string translation service.
   */
  public function __construct(ModuleHandlerInterface $module_handler, ThemeHandlerInterface $theme_handler, CacheBackendInterface $cache_backend, TranslationInterface $string_translation) {
    $this->factory = new ContainerFactory($this);
    $this->moduleHandler = $module_handler;
    $this->themeHandler = $theme_handler;
    $this
      ->setStringTranslation($string_translation);
    $this
      ->alterInfo('breakpoints');
    $this
      ->setCacheBackend($cache_backend, 'breakpoints', [
      'breakpoints',
    ]);
  }

  /**
   * {@inheritdoc}
   */
  protected function getDiscovery() {
    if (!isset($this->discovery)) {
      $this->discovery = new YamlDiscovery('breakpoints', $this->moduleHandler
        ->getModuleDirectories() + $this->themeHandler
        ->getThemeDirectories());
      $this->discovery = new ContainerDerivativeDiscoveryDecorator($this->discovery);
    }
    return $this->discovery;
  }

  /**
   * {@inheritdoc}
   */
  public function processDefinition(&$definition, $plugin_id) {
    parent::processDefinition($definition, $plugin_id);

    // Allow custom groups and therefore more than one group per extension.
    if (empty($definition['group'])) {
      $definition['group'] = $definition['provider'];
    }

    // Ensure a 1x multiplier exists.
    if (!in_array('1x', $definition['multipliers'])) {
      $definition['multipliers'][] = '1x';
    }

    // Ensure that multipliers are sorted correctly.
    sort($definition['multipliers']);
  }

  /**
   * {@inheritdoc}
   */
  protected function providerExists($provider) {
    return $this->moduleHandler
      ->moduleExists($provider) || $this->themeHandler
      ->themeExists($provider);
  }

  /**
   * {@inheritdoc}
   */
  public function getBreakpointsByGroup($group) {
    if (!isset($this->breakpointsByGroup[$group])) {
      if ($cache = $this->cacheBackend
        ->get($this->cacheKey . ':' . $group)) {
        $this->breakpointsByGroup[$group] = $cache->data;
      }
      else {
        $breakpoints = [];
        foreach ($this
          ->getDefinitions() as $plugin_id => $plugin_definition) {
          if ($plugin_definition['group'] == $group) {
            $breakpoints[$plugin_id] = $plugin_definition;
          }
        }
        uasort($breakpoints, [
          'Drupal\\Component\\Utility\\SortArray',
          'sortByWeightElement',
        ]);
        $this->cacheBackend
          ->set($this->cacheKey . ':' . $group, $breakpoints, Cache::PERMANENT, [
          'breakpoints',
        ]);
        $this->breakpointsByGroup[$group] = $breakpoints;
      }
    }
    $instances = [];
    foreach ($this->breakpointsByGroup[$group] as $plugin_id => $definition) {
      if (!isset($this->instances[$plugin_id])) {
        $this->instances[$plugin_id] = $this
          ->createInstance($plugin_id);
      }
      $instances[$plugin_id] = $this->instances[$plugin_id];
    }
    return $instances;
  }

  /**
   * {@inheritdoc}
   */
  public function getGroups() {

    // Use a double colon so as to not clash with the cache for each group.
    if ($cache = $this->cacheBackend
      ->get($this->cacheKey . '::groups')) {
      $groups = $cache->data;
    }
    else {
      $groups = [];
      foreach ($this
        ->getDefinitions() as $plugin_definition) {
        if (!isset($groups[$plugin_definition['group']])) {
          $groups[$plugin_definition['group']] = $plugin_definition['group'];
        }
      }
      $this->cacheBackend
        ->set($this->cacheKey . '::groups', $groups, Cache::PERMANENT, [
        'breakpoints',
      ]);
    }

    // Get the labels. This is not cacheable due to translation.
    $group_labels = [];
    foreach ($groups as $group) {
      $group_labels[$group] = $this
        ->getGroupLabel($group);
    }
    asort($group_labels);
    return $group_labels;
  }

  /**
   * {@inheritdoc}
   */
  public function getGroupProviders($group) {
    $providers = [];
    $breakpoints = $this
      ->getBreakpointsByGroup($group);
    foreach ($breakpoints as $breakpoint) {
      $provider = $breakpoint
        ->getProvider();
      $extension = FALSE;
      if ($this->moduleHandler
        ->moduleExists($provider)) {
        $extension = $this->moduleHandler
          ->getModule($provider);
      }
      elseif ($this->themeHandler
        ->themeExists($provider)) {
        $extension = $this->themeHandler
          ->getTheme($provider);
      }
      if ($extension) {
        $providers[$extension
          ->getName()] = $extension
          ->getType();
      }
    }
    return $providers;
  }

  /**
   * {@inheritdoc}
   */
  public function clearCachedDefinitions() {
    parent::clearCachedDefinitions();
    $this->breakpointsByGroup = NULL;
    $this->instances = [];
  }

  /**
   * Gets the label for a breakpoint group.
   *
   * @param string $group
   *   The breakpoint group.
   *
   * @return string
   *   The label.
   */
  protected function getGroupLabel($group) {

    // Extension names are not translatable.
    if ($this->moduleHandler
      ->moduleExists($group)) {
      $label = $this->moduleHandler
        ->getName($group);
    }
    elseif ($this->themeHandler
      ->themeExists($group)) {
      $label = $this->themeHandler
        ->getName($group);
    }
    else {

      // Custom group label that should be translatable.
      $label = $this
        ->t($group, [], [
        'context' => 'breakpoint',
      ]);
    }
    return $label;
  }

}

Members

Namesort descending Modifiers Type Description Overrides
BreakpointManager::$breakpointsByGroup protected property Static cache of breakpoints keyed by group.
BreakpointManager::$defaults protected property A set of defaults to be referenced by $this->processDefinition() if additional processing of plugins is necessary or helpful for development purposes. Overrides DefaultPluginManager::$defaults
BreakpointManager::$instances protected property The plugin instances.
BreakpointManager::$themeHandler protected property The theme handler.
BreakpointManager::clearCachedDefinitions public function Clears static and persistent plugin definition caches. Overrides DefaultPluginManager::clearCachedDefinitions
BreakpointManager::getBreakpointsByGroup public function Gets breakpoints for the specified group. Overrides BreakpointManagerInterface::getBreakpointsByGroup
BreakpointManager::getDiscovery protected function Gets the plugin discovery. Overrides DefaultPluginManager::getDiscovery
BreakpointManager::getGroupLabel protected function Gets the label for a breakpoint group.
BreakpointManager::getGroupProviders public function Gets all the providers for the specified breakpoint group. Overrides BreakpointManagerInterface::getGroupProviders
BreakpointManager::getGroups public function Gets all the existing breakpoint groups. Overrides BreakpointManagerInterface::getGroups
BreakpointManager::processDefinition public function Performs extra processing on plugin definitions. Overrides DefaultPluginManager::processDefinition
BreakpointManager::providerExists protected function Determines if the provider of a definition exists. Overrides DefaultPluginManager::providerExists
BreakpointManager::__construct public function Constructs a new BreakpointManager instance. Overrides DefaultPluginManager::__construct
DefaultPluginManager::$additionalAnnotationNamespaces protected property Additional namespaces the annotation discovery mechanism should scan for annotation definitions.
DefaultPluginManager::$alterHook protected property Name of the alter hook if one should be invoked.
DefaultPluginManager::$cacheKey protected property The cache key.
DefaultPluginManager::$cacheTags protected property An array of cache tags to use for the cached definitions.
DefaultPluginManager::$moduleHandler protected property The module handler to invoke the alter hook. 1
DefaultPluginManager::$namespaces protected property An object that implements \Traversable which contains the root paths keyed by the corresponding namespace to look for plugin implementations.
DefaultPluginManager::$pluginDefinitionAnnotationName protected property The name of the annotation that contains the plugin definition.
DefaultPluginManager::$pluginInterface protected property The interface each plugin should implement. 1
DefaultPluginManager::$subdir protected property The subdirectory within a namespace to look for plugins, or FALSE if the plugins are in the top level of the namespace.
DefaultPluginManager::alterDefinitions protected function Invokes the hook to alter the definitions if the alter hook is set. 1
DefaultPluginManager::alterInfo protected function Sets the alter hook name.
DefaultPluginManager::extractProviderFromDefinition protected function Extracts the provider from a plugin definition.
DefaultPluginManager::findDefinitions protected function Finds plugin definitions. 7
DefaultPluginManager::fixContextAwareDefinitions private function Fix the definitions of context-aware plugins.
DefaultPluginManager::getCacheContexts public function The cache contexts associated with this object. Overrides CacheableDependencyInterface::getCacheContexts
DefaultPluginManager::getCachedDefinitions protected function Returns the cached plugin definitions of the decorated discovery class.
DefaultPluginManager::getCacheMaxAge public function The maximum age for which this object may be cached. Overrides CacheableDependencyInterface::getCacheMaxAge
DefaultPluginManager::getCacheTags public function The cache tags associated with this object. Overrides CacheableDependencyInterface::getCacheTags
DefaultPluginManager::getDefinitions public function Gets the definition of all plugins for this type. Overrides DiscoveryTrait::getDefinitions 2
DefaultPluginManager::getFactory protected function Gets the plugin factory. Overrides PluginManagerBase::getFactory
DefaultPluginManager::setCacheBackend public function Initialize the cache backend.
DefaultPluginManager::setCachedDefinitions protected function Sets a cache of plugin definitions for the decorated discovery class.
DefaultPluginManager::useCaches public function Disable the use of caches. Overrides CachedDiscoveryInterface::useCaches 1
DiscoveryCachedTrait::$definitions protected property Cached definitions array. 1
DiscoveryCachedTrait::getDefinition public function Overrides DiscoveryTrait::getDefinition 3
DiscoveryTrait::doGetDefinition protected function Gets a specific plugin definition.
DiscoveryTrait::hasDefinition public function
PluginManagerBase::$discovery protected property The object that discovers plugins managed by this manager.
PluginManagerBase::$factory protected property The object that instantiates plugins managed by this manager.
PluginManagerBase::$mapper protected property The object that returns the preconfigured plugin instance appropriate for a particular runtime condition.
PluginManagerBase::createInstance public function Creates a pre-configured instance of a plugin. Overrides FactoryInterface::createInstance 12
PluginManagerBase::getInstance public function Gets a preconfigured instance of a plugin. Overrides MapperInterface::getInstance 7
PluginManagerBase::handlePluginNotFound protected function Allows plugin managers to specify custom behavior if a plugin is not found. 1
StringTranslationTrait::$stringTranslation protected property The string translation service. 1
StringTranslationTrait::formatPlural protected function Formats a string containing a count of items.
StringTranslationTrait::getNumberOfPlurals protected function Returns the number of plurals supported by a given language.
StringTranslationTrait::getStringTranslation protected function Gets the string translation service.
StringTranslationTrait::setStringTranslation public function Sets the string translation service to use. 2
StringTranslationTrait::t protected function Translates a string to the current language or to a given language.
UseCacheBackendTrait::$cacheBackend protected property Cache backend instance.
UseCacheBackendTrait::$useCaches protected property Flag whether caches should be used or skipped.
UseCacheBackendTrait::cacheGet protected function Fetches from the cache backend, respecting the use caches flag. 1
UseCacheBackendTrait::cacheSet protected function Stores data in the persistent cache, respecting the use caches flag.