refs #civicrm_fields added inline field widgets.

src/Plugin/Field/FieldWidget/ContactInlineWidget.php

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+<?php
+
+namespace Drupal\civicrm_fields\Plugin\Field\FieldWidget;
+
+use Drupal\civicrm_fields\Utility\CivicrmService;
+use Drupal\Core\Field\FieldDefinitionInterface;
+use Drupal\Core\Field\FieldItemListInterface;
+use Drupal\Core\Field\WidgetBase;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Plugin implementation of the 'civicrm_field_contact' field widget.
+ *
+ * @FieldWidget(
+ *   id = "civicrm_field_contact_inline_widget",
+ *   label = @Translation("CiviCRM contact inline widget"),
+ *   field_types = {
+ *     "civicrm_field_contact",
+ *   }
+ * )
+ */
+class ContactInlineWidget extends WidgetBase implements ContainerFactoryPluginInterface {
+
+  /**
+   * The CiviCRM API service.
+   *
+   * @var \Drupal\civicrm_fields\Utility\CivicrmService
+   */
+  protected $service;
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
+    return new static(
+      $plugin_id,
+      $plugin_definition,
+      $configuration['field_definition'],
+      $configuration['settings'],
+      $configuration['third_party_settings'],
+      $container->get('civicrm.service')
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function __construct($plugin_id, $plugin_definition, FieldDefinitionInterface $field_definition, array $settings, array $third_party_settings, CivicrmService $service) {
+    parent::__construct($plugin_id, $plugin_definition, $field_definition, $settings, $third_party_settings);
+    $this->service = $service;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
+    $item =& $items[$delta];
+    // Store element(s) for the field.
+    $element = [];
+    // Fetch default value.
+    $default = NULL;
+    if (isset($item->contact_id)) {
+      $result = $this->service->api('Contact', 'GetSingle', ['contact_id' => $item->contact_id]);
+      $default = $result['display_name'] . ' (' . $result['contact_id'] . ')';
+    }
+    // Autocomplete field for contact_id.
+    $element['contact_id'] = [
+      '#title' => $this->t('CiviCRM Contact ID'),
+      '#type' => 'textfield',
+      '#autocomplete_route_name' => 'civicrm_fields.endpoint',
+      '#autocomplete_route_parameters' => [
+        'entity' => 'contact',
+        'count' => 10,
+      ],
+      '#default_value' => $default,
+    ];
+    // Return element(s).
+    return $element;
+  }
+
+}

src/Plugin/Field/FieldWidget/ContributionPageInlineWidget.php

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+<?php
+
+namespace Drupal\civicrm_fields\Plugin\Field\FieldWidget;
+
+use Drupal\civicrm_fields\Utility\CivicrmService;
+use Drupal\Core\Field\FieldDefinitionInterface;
+use Drupal\Core\Field\FieldItemListInterface;
+use Drupal\Core\Field\WidgetBase;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Plugin implementation of the 'civicrm_field_contribution_page' field widget.
+ *
+ * @FieldWidget(
+ *   id = "civicrm_field_contribution_page_inline_widget",
+ *   label = @Translation("CiviCRM contribution page inline widget"),
+ *   field_types = {
+ *     "civicrm_field_contribution_page",
+ *   }
+ * )
+ */
+class ContributionPageInlineWidget extends WidgetBase implements ContainerFactoryPluginInterface {
+
+  /**
+   * The CiviCRM API service.
+   *
+   * @var \Drupal\civicrm_fields\Utility\CivicrmService
+   */
+  protected $service;
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
+    return new static(
+      $plugin_id,
+      $plugin_definition,
+      $configuration['field_definition'],
+      $configuration['settings'],
+      $configuration['third_party_settings'],
+      $container->get('civicrm.service')
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function __construct($plugin_id, $plugin_definition, FieldDefinitionInterface $field_definition, array $settings, array $third_party_settings, CivicrmService $service) {
+    parent::__construct($plugin_id, $plugin_definition, $field_definition, $settings, $third_party_settings);
+    $this->service = $service;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
+    $item =& $items[$delta];
+    // Store element(s) for the field.
+    $element = [];
+    // Fetch default value.
+    $default = NULL;
+    if (isset($item->contribution_page_id)) {
+      $result = $this->service->api('ContributionPage', 'GetSingle', ['id' => $item->contribution_page_id]);
+      $default = $result['title'] . ' (' . $result['id'] . ')';
+    }
+    // Autocomplete field for contribution_page_id.
+    $element['contribution_page_id'] = [
+      '#title' => $this->t('CiviCRM Contribution ID'),
+      '#type' => 'textfield',
+      '#autocomplete_route_name' => 'civicrm_fields.endpoint',
+      '#autocomplete_route_parameters' => [
+        'entity' => 'contributionPage',
+        'count' => 10,
+      ],
+      '#default_value' => $default,
+    ];
+    // Return element(s).
+    return $element;
+  }
+
+}

src/Plugin/Field/FieldWidget/EventInlineWidget.php

@@ -0,0 +1,83 @@
+<?php
+
+namespace Drupal\civicrm_fields\Plugin\Field\FieldWidget;
+
+use Drupal\civicrm_fields\Utility\CivicrmService;
+use Drupal\Core\Field\FieldDefinitionInterface;
+use Drupal\Core\Field\FieldItemListInterface;
+use Drupal\Core\Field\WidgetBase;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Plugin implementation of the 'civicrm_field_event' field widget.
+ *
+ * @FieldWidget(
+ *   id = "civicrm_field_event_inline_widget",
+ *   label = @Translation("CiviCRM event inline widget"),
+ *   field_types = {
+ *     "civicrm_field_event",
+ *   }
+ * )
+ */
+class EventInlineWidget extends WidgetBase implements ContainerFactoryPluginInterface {
+
+  /**
+   * The CiviCRM API service.
+   *
+   * @var \Drupal\civicrm_fields\Utility\CivicrmService
+   */
+  protected $service;
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
+    return new static(
+      $plugin_id,
+      $plugin_definition,
+      $configuration['field_definition'],
+      $configuration['settings'],
+      $configuration['third_party_settings'],
+      $container->get('civicrm.service')
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function __construct($plugin_id, $plugin_definition, FieldDefinitionInterface $field_definition, array $settings, array $third_party_settings, CivicrmService $service) {
+    parent::__construct($plugin_id, $plugin_definition, $field_definition, $settings, $third_party_settings);
+    $this->service = $service;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
+    $item =& $items[$delta];
+    // Store element(s) for the field.
+    $element = [];
+    // Fetch default value.
+    $default = NULL;
+    if (isset($item->event_id)) {
+      $result = $this->service->api('Event', 'GetSingle', ['id' => $item->event_id]);
+      $default = $result['title'] . ' (' . $result['id'] . ')';
+    }
+    // Autocomplete field for event_id.
+    $element['event_id'] = [
+      '#title' => $this->t('CiviCRM Event ID'),
+      '#type' => 'textfield',
+      '#autocomplete_route_name' => 'civicrm_fields.endpoint',
+      '#autocomplete_route_parameters' => [
+        'entity' => 'event',
+        'count' => 10,
+      ],
+      '#default_value' => $default,
+    ];
+    // Return element(s).
+    return $element;
+  }
+
+}