field_default_form

Create a separate form element for each field.

1 call to field_default_form()

1 invocation of field_default_form()

File

modules/field/field.form.inc, line 11

Field forms management.

Code

function field_default_form($entity_type, $entity, $field, $instance, $langcode, $items, &$form, &$form_state, $get_delta = NULL) {
  // This could be called with no entity, as when a UI module creates a
  // dummy form to set default values.
  if ($entity) {
    list($id, ,  ) = entity_extract_ids($entity_type, $entity);
  }

  $parents = $form['#parents'];

  $addition = array();
  $field_name = $field['field_name'];
  $addition[$field_name] = array();

  // Populate widgets with default values when creating a new entity.
  if (empty($items) && empty($id)) {
    $items = field_get_default_value($entity_type, $entity, $field, $instance, $langcode);
  }

  // Let modules alter the widget properties.
  $context = array(
    'entity_type' => $entity_type, 
    'entity' => $entity, 
    'field' => $field, 
    'instance' => $instance,
  );
  drupal_alter(array('field_widget_properties', 'field_widget_properties_' . $entity_type), $instance['widget'], $context);

  // Collect widget elements.
  $elements = array();
  if (field_access('edit', $field, $entity_type, $entity)) {
    // Store field information in $form_state.
    if (!field_form_get_state($parents, $field_name, $langcode, $form_state)) {
      $field_state = array(
        'field' => $field, 
        'instance' => $instance, 
        'items_count' => count($items), 
        'array_parents' => array(), 
        'errors' => array(),
      );
      field_form_set_state($parents, $field_name, $langcode, $form_state, $field_state);
    }

    // If field module handles multiple values for this form element, and we
    // are displaying an individual element, process the multiple value form.
    if (!isset($get_delta) && field_behaviors_widget('multiple values', $instance) == FIELD_BEHAVIOR_DEFAULT) {
      // Store the entity in the form.
      $form['#entity'] = $entity;
      $elements = field_multiple_value_form($field, $instance, $langcode, $items, $form, $form_state);
    }
    // If the widget is handling multiple values (e.g Options), or if we are
    // displaying an individual element, just get a single form element and
    // make it the $delta value.
    else {
      $delta = isset($get_delta) ? $get_delta : 0;
      $function = $instance['widget']['module'] . '_field_widget_form';
      if (function_exists($function)) {
        $element = array(
          '#entity' => $entity, 
          '#entity_type' => $instance['entity_type'], 
          '#bundle' => $instance['bundle'], 
          '#field_name' => $field_name, 
          '#language' => $langcode, 
          '#field_parents' => $parents, 
          '#columns' => array_keys($field['columns']), 
          '#title' => check_plain($instance['label']), 
          '#description' => field_filter_xss($instance['description']),
          // Only the first widget should be required. 
          '#required' => $delta == 0 && $instance['required'], 
          '#delta' => $delta,
        );
        if ($element = $function($form, $form_state, $field, $instance, $langcode, $items, $delta, $element)) {
          // Allow modules to alter the field widget form element.
          $context = array(
            'form' => $form, 
            'field' => $field, 
            'instance' => $instance, 
            'langcode' => $langcode, 
            'items' => $items, 
            'delta' => $delta,
          );
          drupal_alter(array('field_widget_form', 'field_widget_' . $instance['widget']['type'] . '_form'), $element, $form_state, $context);

          // If we're processing a specific delta value for a field where the
          // field module handles multiples, set the delta in the result.
          // For fields that handle their own processing, we can't make
          // assumptions about how the field is structured, just merge in the
          // returned element.
          if (field_behaviors_widget('multiple values', $instance) == FIELD_BEHAVIOR_DEFAULT) {
            $elements[$delta] = $element;
          }
          else {
            $elements = $element;
          }
        }
      }
    }
  }

  if ($elements) {
    // Also aid in theming of field widgets by rendering a classified
    // container.
    $addition[$field_name] = array(
      '#type' => 'container', 
      '#attributes' => array(
        'class' => array(
          'field-type-' . drupal_html_class($field['type']),
          'field-name-' . drupal_html_class($field_name),
          'field-widget-' . drupal_html_class($instance['widget']['type']),
        ),
      ), 
      '#weight' => $instance['widget']['weight'],
    );
  }

  // Populate the 'array_parents' information in $form_state['field'] after
  // the form is built, so that we catch changes in the form structure performed
  // in alter() hooks.
  $elements['#after_build'][] = 'field_form_element_after_build';
  $elements['#field_name'] = $field_name;
  $elements['#language'] = $langcode;
  $elements['#field_parents'] = $parents;

  $addition[$field_name] += array(
    '#tree' => TRUE,
    // The '#language' key can be used to access the field's form element
    // when $langcode is unknown. 
    '#language' => $langcode, 
    $langcode => $elements,
  );

  return $addition;
}