class Context

Same name in this branch
  1. 8.9.x core/lib/Drupal/Component/Plugin/Context/Context.php \Drupal\Component\Plugin\Context\Context
Same name in other branches
  1. 9 core/lib/Drupal/Core/Plugin/Context/Context.php \Drupal\Core\Plugin\Context\Context
  2. 9 core/lib/Drupal/Component/Plugin/Context/Context.php \Drupal\Component\Plugin\Context\Context
  3. 10 core/lib/Drupal/Core/Plugin/Context/Context.php \Drupal\Core\Plugin\Context\Context
  4. 10 core/lib/Drupal/Component/Plugin/Context/Context.php \Drupal\Component\Plugin\Context\Context
  5. 11.x core/lib/Drupal/Core/Plugin/Context/Context.php \Drupal\Core\Plugin\Context\Context
  6. 11.x core/lib/Drupal/Component/Plugin/Context/Context.php \Drupal\Component\Plugin\Context\Context

A Drupal specific context wrapper class.

Hierarchy

Expanded class hierarchy of Context

25 files declare their use of Context
ContextAwarePluginBase.php in core/lib/Drupal/Core/Plugin/ContextAwarePluginBase.php
ContextDefinitionIsSatisfiedTest.php in core/tests/Drupal/Tests/Core/Plugin/Context/ContextDefinitionIsSatisfiedTest.php
ContextTest.php in core/tests/Drupal/Tests/Core/Plugin/Context/ContextTest.php
Contains \Drupal\Tests\Core\Plugin\Context\ContextTest.
ContextTypedDataTest.php in core/tests/Drupal/KernelTests/Core/Plugin/ContextTypedDataTest.php
CurrentLanguageContext.php in core/lib/Drupal/Core/Language/ContextProvider/CurrentLanguageContext.php

... See full list

19 string references to 'Context'
AccessResultTest::testCacheUntilConfigurationChanges in core/tests/Drupal/Tests/Core/Access/AccessResultTest.php
@expectedDeprecation Drupal\Core\Access\AccessResult::cacheUntilConfigurationChanges is deprecated in drupal:8.0.0 and is removed in drupal:9.0.0. Use \Drupal\Core\Access\AccessResult::addCacheableDependency() instead. @group legacy
AccessResultTest::testCacheUntilEntityChanges in core/tests/Drupal/Tests/Core/Access/AccessResultTest.php
@expectedDeprecation Drupal\Core\Access\AccessResult::cacheUntilEntityChanges is deprecated in drupal:8.0.0 and is removed in drupal:9.0.0. Use \Drupal\Core\Access\AccessResult::addCacheableDependency() instead. @group legacy
ContextualLinkDefaultTest::testGetTitleWithContext in core/tests/Drupal/Tests/Core/Menu/ContextualLinkDefaultTest.php
@covers ::getTitle
drupal7.php in core/modules/migrate_drupal/tests/fixtures/drupal7.php
A database agnostic dump for testing purposes.
EntityManagerTest::testGetTranslationFromContext in core/tests/Drupal/Tests/Core/Entity/EntityManagerTest.php
Tests the getTranslationFromContext() method.

... See full list

File

core/lib/Drupal/Core/Plugin/Context/Context.php, line 16

Namespace

Drupal\Core\Plugin\Context
View source
class Context extends ComponentContext implements ContextInterface {
    use TypedDataTrait;
    use DependencySerializationTrait;
    
    /**
     * The data associated with the context.
     *
     * @var \Drupal\Core\TypedData\TypedDataInterface
     */
    protected $contextData;
    
    /**
     * The definition to which a context must conform.
     *
     * @var \Drupal\Core\Plugin\Context\ContextDefinitionInterface
     */
    protected $contextDefinition;
    
    /**
     * The cacheability metadata.
     *
     * @var \Drupal\Core\Cache\CacheableMetadata
     */
    protected $cacheabilityMetadata;
    
    /**
     * Create a context object.
     *
     * @param \Drupal\Core\Plugin\Context\ContextDefinitionInterface $context_definition
     *   The context definition.
     * @param mixed|null $context_value
     *   The context value object.
     */
    public function __construct(ContextDefinitionInterface $context_definition, $context_value = NULL) {
        parent::__construct($context_definition, NULL);
        $this->cacheabilityMetadata = new CacheableMetadata();
        if (!is_null($context_value)) {
            $this->setContextValue($context_value);
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function getContextValue() {
        if (!isset($this->contextData)) {
            $definition = $this->getContextDefinition();
            $default_value = $definition->getDefaultValue();
            if (isset($default_value)) {
                // Keep the default value here so that subsequent calls don't have to
                // look it up again.
                $this->setContextValue($default_value);
            }
            elseif ($definition->isRequired()) {
                $type = $definition->getDataType();
                throw new ContextException("The '{$type}' context is required and not present.");
            }
            return $default_value;
        }
        return $this->getTypedDataManager()
            ->getCanonicalRepresentation($this->contextData);
    }
    
    /**
     * {@inheritdoc}
     */
    public function hasContextValue() {
        return (bool) $this->contextData || parent::hasContextValue();
    }
    
    /**
     * Sets the context value.
     *
     * @param mixed $value
     *   The value of this context, matching the context definition.
     */
    protected function setContextValue($value) {
        // Add the value as a cacheable dependency only if implements the interface
        // to prevent it from disabling caching with a max-age 0.
        if ($value instanceof CacheableDependencyInterface) {
            $this->addCacheableDependency($value);
        }
        if ($value instanceof TypedDataInterface) {
            $this->contextData = $value;
        }
        else {
            $this->contextData = $this->getTypedDataManager()
                ->create($this->contextDefinition
                ->getDataDefinition(), $value);
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function getConstraints() {
        return $this->contextDefinition
            ->getConstraints();
    }
    
    /**
     * {@inheritdoc}
     */
    public function getContextData() {
        if (!isset($this->contextData)) {
            $definition = $this->getContextDefinition();
            $default_value = $definition->getDefaultValue();
            // Store the default value so that subsequent calls don't have to look
            // it up again.
            $this->contextData = $this->getTypedDataManager()
                ->create($definition->getDataDefinition(), $default_value);
        }
        return $this->contextData;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getContextDefinition() {
        return $this->contextDefinition;
    }
    
    /**
     * {@inheritdoc}
     */
    public function validate() {
        return $this->getContextData()
            ->validate();
    }
    
    /**
     * {@inheritdoc}
     */
    public function addCacheableDependency($dependency) {
        $this->cacheabilityMetadata = $this->cacheabilityMetadata
            ->merge(CacheableMetadata::createFromObject($dependency));
        return $this;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getCacheContexts() {
        return $this->cacheabilityMetadata
            ->getCacheContexts();
    }
    
    /**
     * {@inheritdoc}
     */
    public function getCacheTags() {
        return $this->cacheabilityMetadata
            ->getCacheTags();
    }
    
    /**
     * {@inheritdoc}
     */
    public function getCacheMaxAge() {
        return $this->cacheabilityMetadata
            ->getCacheMaxAge();
    }
    
    /**
     * {@inheritdoc}
     */
    public static function createFromContext(ContextInterface $old_context, $value) {
        $context = new static($old_context->getContextDefinition(), $value);
        $context->addCacheableDependency($old_context);
        if (method_exists($old_context, 'getTypedDataManager')) {
            $context->setTypedDataManager($old_context->getTypedDataManager());
        }
        return $context;
    }

}

Members

Title Sort descending Modifiers Object type Summary Overriden Title Overrides
Context::$cacheabilityMetadata protected property The cacheability metadata.
Context::$contextData protected property The data associated with the context.
Context::$contextDefinition protected property The definition to which a context must conform. Overrides Context::$contextDefinition
Context::$contextValue protected property The value of the context.
Context::addCacheableDependency public function Adds a dependency on an object: merges its cacheability metadata. Overrides ContextInterface::addCacheableDependency
Context::createFromContext public static function Creates a new context with a different value. Overrides ContextInterface::createFromContext
Context::getCacheContexts public function The cache contexts associated with this object. Overrides CacheableDependencyInterface::getCacheContexts
Context::getCacheMaxAge public function The maximum age for which this object may be cached. Overrides CacheableDependencyInterface::getCacheMaxAge
Context::getCacheTags public function The cache tags associated with this object. Overrides CacheableDependencyInterface::getCacheTags
Context::getConstraints public function Gets a list of validation constraints. Overrides Context::getConstraints
Context::getContextData public function Gets the context value as typed data object. Overrides ContextInterface::getContextData
Context::getContextDefinition public function Gets the provided definition that the context must conform to. Overrides Context::getContextDefinition
Context::getContextValue public function Gets the context value. Overrides Context::getContextValue
Context::hasContextValue public function Returns whether the context has a value. Overrides Context::hasContextValue
Context::setContextValue protected function Sets the context value.
Context::validate public function Validates the set context value. Overrides Context::validate
Context::__construct public function Create a context object. Overrides Context::__construct
DependencySerializationTrait::$_entityStorages protected property An array of entity type IDs keyed by the property name of their storages.
DependencySerializationTrait::$_serviceIds protected property An array of service IDs keyed by property name used for serialization.
DependencySerializationTrait::__sleep public function 1
DependencySerializationTrait::__wakeup public function 2
TypedDataTrait::$typedDataManager protected property The typed data manager used for creating the data types.
TypedDataTrait::getTypedDataManager public function Gets the typed data manager. 2
TypedDataTrait::setTypedDataManager public function Sets the typed data manager. 2

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