/**
  * Implements EntityReferenceHandler::settingsForm().
  */
 public static function settingsForm($field, $instance)
 {
     $view_settings = empty($field['settings']['handler_settings']['view']) ? '' : $field['settings']['handler_settings']['view'];
     $displays = views_get_applicable_views('entityreference display');
     // Filter views that list the entity type we want, and group the separate
     // displays by view.
     $entity_info = entity_get_info($field['settings']['target_type']);
     $options = array();
     foreach ($displays as $data) {
         list($view, $display_id) = $data;
         if ($view->base_table == $entity_info['base table']) {
             $options[$view->name . ':' . $display_id] = $view->name . ' - ' . $view->display[$display_id]->display_title;
         }
     }
     // The value of the 'view_and_display' select below will need to be split
     // into 'view_name' and 'view_display' in the final submitted values, so
     // we massage the data at validate time on the wrapping element (not
     // ideal).
     $form['view']['#element_validate'] = array('entityreference_view_settings_validate');
     if ($options) {
         $default = !empty($view_settings['view_name']) ? $view_settings['view_name'] . ':' . $view_settings['display_name'] : NULL;
         $form['view']['view_and_display'] = array('#type' => 'select', '#title' => t('View used to select the entities'), '#required' => TRUE, '#options' => $options, '#default_value' => $default, '#description' => '<p>' . t('Choose the view and display that select the entities that can be referenced.<br />Only views with a display of type "Entity Reference" are eligible.') . '</p>');
         $default = !empty($view_settings['args']) ? implode(', ', $view_settings['args']) : '';
         $form['view']['args'] = array('#type' => 'textfield', '#title' => t('View arguments'), '#default_value' => $default, '#required' => FALSE, '#description' => t('Provide a comma separated list of arguments to pass to the view.'));
     } else {
         $form['view']['no_view_help'] = array('#markup' => '<p>' . t('No eligible views were found. <a href="@create">Create a view</a> with an <em>Entity Reference</em> display, or add such a display to an <a href="@existing">existing view</a>.', array('@create' => url('admin/structure/views/add'), '@existing' => url('admin/structure/views'))) . '</p>');
     }
     return $form;
 }
 /**
  * Implements EntityReferenceHandler::settingsForm().
  */
 public static function settingsForm($field, $instance)
 {
     $view_settings = empty($field['settings']['handler_settings']['view']) ? '' : $field['settings']['handler_settings']['view'];
     $displays = views_get_applicable_views('entityreference display');
     // Filter views that list the entity type we want, and group the separate
     // displays by view.
     $entity_info = entity_get_info($field['settings']['target_type']);
     $options = array();
     foreach ($displays as $data) {
         list($view, $display_id) = $data;
         if ($view->base_table == $entity_info['base table']) {
             $options[$view->name . ':' . $display_id] = $view->name . ' - ' . $view->display[$display_id]->display_title;
         }
     }
     // The value of the 'view_and_display' select below will need to be split
     // into 'view_name' and 'view_display' in the final submitted values, so
     // we massage the data at validate time on the wrapping element (not
     // ideal).
     $form['view']['#element_validate'] = array('entityreference_view_settings_validate');
     if ($options) {
         $default = !empty($view_settings['view_name']) ? $view_settings['view_name'] . ':' . $view_settings['display_name'] : NULL;
         $form['view']['view_and_display'] = array('#type' => 'select', '#title' => t('View used to select the entities'), '#required' => TRUE, '#options' => $options, '#default_value' => $default, '#description' => '<p>' . t('Choose the view and display that select the entities that can be referenced.<br />Only views with a display of type "Entity Reference" are eligible.') . '</p>');
         $default = !empty($view_settings['args']) ? implode(', ', $view_settings['args']) : '';
         $description = t('Provide a comma separated list of arguments to pass to the view.') . '<br />' . t('This field supports tokens.');
         if (!module_exists('token')) {
             $description .= '<br>' . t('Install the <a href="@url">token module</a> to get more tokens and display available once.', array('@url' => 'http://drupal.org/project/token'));
         }
         $form['view']['args'] = array('#type' => 'textfield', '#title' => t('View arguments'), '#default_value' => $default, '#required' => FALSE, '#description' => $description, '#maxlength' => '512');
         if (module_exists('token')) {
             $default = !empty($view_settings['cleanup']) ? $view_settings['cleanup'] : 0;
             $form['view']['cleanup'] = array('#type' => 'checkbox', '#title' => t('Remove empty arguments'), '#default' => $default, '#description' => '<p>' . t('Remove empty arguments after token replacement. This is useful if your view accepts optional arguments.') . '</p>');
             // Get the token type for the entity type our field is in (a type 'taxonomy_term' has a 'term' type token).
             $info = entity_get_info($instance['entity_type']);
             $form['view']['tokens'] = array('#theme' => 'token_tree', '#token_types' => array($info['token type']), '#global_types' => TRUE, '#click_insert' => TRUE, '#dialog' => TRUE);
         }
     } else {
         $form['view']['no_view_help'] = array('#markup' => '<p>' . t('No eligible views were found. <a href="@create">Create a view</a> with an <em>Entity Reference</em> display, or add such a display to an <a href="@existing">existing view</a>.', array('@create' => url('admin/structure/views/add'), '@existing' => url('admin/structure/views'))) . '</p>');
     }
     return $form;
 }