diff core/lib/Drupal/Core/Field/WidgetPluginManager.php @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/lib/Drupal/Core/Field/WidgetPluginManager.php	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,212 @@
+<?php
+
+namespace Drupal\Core\Field;
+
+use Drupal\Component\Plugin\Factory\DefaultFactory;
+use Drupal\Core\Cache\CacheBackendInterface;
+use Drupal\Core\Extension\ModuleHandlerInterface;
+use Drupal\Core\Plugin\DefaultPluginManager;
+
+/**
+ * Plugin type manager for field widgets.
+ *
+ * @ingroup field_widget
+ */
+class WidgetPluginManager extends DefaultPluginManager {
+
+  /**
+   * The field type manager to define field.
+   *
+   * @var \Drupal\Core\Field\FieldTypePluginManagerInterface
+   */
+  protected $fieldTypeManager;
+
+  /**
+   * An array of widget options for each field type.
+   *
+   * @var array
+   */
+  protected $widgetOptions;
+
+  /**
+   * Constructs a WidgetPluginManager object.
+   *
+   * @param \Traversable $namespaces
+   *   An object that implements \Traversable which contains the root paths
+   *   keyed by the corresponding namespace to look for plugin implementations.
+   * @param \Drupal\Core\Cache\CacheBackendInterface $cache_backend
+   *   Cache backend instance to use.
+   * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
+   *   The module handler.
+   * @param \Drupal\Core\Field\FieldTypePluginManagerInterface $field_type_manager
+   *   The 'field type' plugin manager.
+   */
+  public function __construct(\Traversable $namespaces, CacheBackendInterface $cache_backend, ModuleHandlerInterface $module_handler, FieldTypePluginManagerInterface $field_type_manager) {
+    parent::__construct('Plugin/Field/FieldWidget', $namespaces, $module_handler, 'Drupal\Core\Field\WidgetInterface', 'Drupal\Core\Field\Annotation\FieldWidget');
+
+    $this->setCacheBackend($cache_backend, 'field_widget_types_plugins');
+    $this->alterInfo('field_widget_info');
+    $this->fieldTypeManager = $field_type_manager;
+  }
+
+  /**
+   * Overrides PluginManagerBase::getInstance().
+   *
+   * @param array $options
+   *   An array with the following key/value pairs:
+   *   - field_definition: (FieldDefinitionInterface) The field definition.
+   *   - form_mode: (string) The form mode.
+   *   - prepare: (bool, optional) Whether default values should get merged in
+   *     the 'configuration' array. Defaults to TRUE.
+   *   - configuration: (array) the configuration for the widget. The
+   *     following key value pairs are allowed, and are all optional if
+   *     'prepare' is TRUE:
+   *     - type: (string) The widget to use. Defaults to the
+   *       'default_widget' for the field type. The default widget will also be
+   *       used if the requested widget is not available.
+   *     - settings: (array) Settings specific to the widget. Each setting
+   *       defaults to the default value specified in the widget definition.
+   *     - third_party_settings: (array) Settings provided by other extensions
+   *       through hook_field_formatter_third_party_settings_form().
+   *
+   * @return \Drupal\Core\Field\WidgetInterface|null
+   *   A Widget object or NULL when plugin is not found.
+   */
+  public function getInstance(array $options) {
+    // Fill in defaults for missing properties.
+    $options += [
+      'configuration' => [],
+      'prepare' => TRUE,
+    ];
+
+    $configuration = $options['configuration'];
+    $field_definition = $options['field_definition'];
+    $field_type = $field_definition->getType();
+
+    // Fill in default configuration if needed.
+    if ($options['prepare']) {
+      $configuration = $this->prepareConfiguration($field_type, $configuration);
+    }
+
+    $plugin_id = $configuration['type'];
+
+    // Switch back to default widget if either:
+    // - the configuration does not specify a widget class
+    // - the field type is not allowed for the widget
+    // - the widget is not applicable to the field definition.
+    $definition = $this->getDefinition($configuration['type'], FALSE);
+    if (!isset($definition['class']) || !in_array($field_type, $definition['field_types']) || !$definition['class']::isApplicable($field_definition)) {
+      // Grab the default widget for the field type.
+      $field_type_definition = $this->fieldTypeManager->getDefinition($field_type);
+      if (empty($field_type_definition['default_widget'])) {
+        return NULL;
+      }
+      $plugin_id = $field_type_definition['default_widget'];
+    }
+
+    $configuration += [
+      'field_definition' => $field_definition,
+    ];
+    return $this->createInstance($plugin_id, $configuration);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function createInstance($plugin_id, array $configuration = []) {
+    $plugin_definition = $this->getDefinition($plugin_id);
+    $plugin_class = DefaultFactory::getPluginClass($plugin_id, $plugin_definition);
+
+    // If the plugin provides a factory method, pass the container to it.
+    if (is_subclass_of($plugin_class, 'Drupal\Core\Plugin\ContainerFactoryPluginInterface')) {
+      return $plugin_class::create(\Drupal::getContainer(), $configuration, $plugin_id, $plugin_definition);
+    }
+
+    return new $plugin_class($plugin_id, $plugin_definition, $configuration['field_definition'], $configuration['settings'], $configuration['third_party_settings']);
+  }
+
+
+  /**
+   * Merges default values for widget configuration.
+   *
+   * @param string $field_type
+   *   The field type.
+   * @param array $configuration
+   *   An array of widget configuration.
+   *
+   * @return array
+   *   The display properties with defaults added.
+   */
+  public function prepareConfiguration($field_type, array $configuration) {
+    // Fill in defaults for missing properties.
+    $configuration += [
+      'settings' => [],
+      'third_party_settings' => [],
+    ];
+    // If no widget is specified, use the default widget.
+    if (!isset($configuration['type'])) {
+      $field_type = $this->fieldTypeManager->getDefinition($field_type);
+      $configuration['type'] = isset($field_type['default_widget']) ? $field_type['default_widget'] : NULL;
+    }
+    // Filter out unknown settings, and fill in defaults for missing settings.
+    $default_settings = $this->getDefaultSettings($configuration['type']);
+    $configuration['settings'] = array_intersect_key($configuration['settings'], $default_settings) + $default_settings;
+
+    return $configuration;
+  }
+
+  /**
+   * Returns an array of widget type options for a field type.
+   *
+   * @param string|null $field_type
+   *   (optional) The name of a field type, or NULL to retrieve all widget
+   *   options. Defaults to NULL.
+   *
+   * @return array
+   *   If no field type is provided, returns a nested array of all widget types,
+   *   keyed by field type human name.
+   */
+  public function getOptions($field_type = NULL) {
+    if (!isset($this->widgetOptions)) {
+      $options = [];
+      $field_types = $this->fieldTypeManager->getDefinitions();
+      $widget_types = $this->getDefinitions();
+      uasort($widget_types, ['Drupal\Component\Utility\SortArray', 'sortByWeightElement']);
+      foreach ($widget_types as $name => $widget_type) {
+        foreach ($widget_type['field_types'] as $widget_field_type) {
+          // Check that the field type exists.
+          if (isset($field_types[$widget_field_type])) {
+            $options[$widget_field_type][$name] = $widget_type['label'];
+          }
+        }
+      }
+      $this->widgetOptions = $options;
+    }
+    if (isset($field_type)) {
+      return !empty($this->widgetOptions[$field_type]) ? $this->widgetOptions[$field_type] : [];
+    }
+
+    return $this->widgetOptions;
+  }
+
+  /**
+   * Returns the default settings of a field widget.
+   *
+   * @param string $type
+   *   A field widget type name.
+   *
+   * @return array
+   *   The widget type's default settings, as provided by the plugin
+   *   definition, or an empty array if type or settings are undefined.
+   */
+  public function getDefaultSettings($type) {
+    $plugin_definition = $this->getDefinition($type, FALSE);
+    if (!empty($plugin_definition['class'])) {
+      $plugin_class = DefaultFactory::getPluginClass($type, $plugin_definition);
+      return $plugin_class::defaultSettings();
+    }
+
+    return [];
+  }
+
+}