function image_field_widget_form in Drupal 7

Implements hook_field_widget_form().

File

modules/image/image.field.inc, line 327

Implement an image field, based on the file module's file field.

Code

function image_field_widget_form(&$form, &$form_state, $field, $instance, $langcode, $items, $delta, $element) {

  // Add display_field setting to field because file_field_widget_form() assumes it is set.
  $field['settings']['display_field'] = 0;
  $elements = file_field_widget_form($form, $form_state, $field, $instance, $langcode, $items, $delta, $element);
  $settings = $instance['settings'];
  foreach (element_children($elements) as $delta) {

    // Add upload resolution validation.
    if ($settings['max_resolution'] || $settings['min_resolution']) {
      $elements[$delta]['#upload_validators']['file_validate_image_resolution'] = array(
        $settings['max_resolution'],
        $settings['min_resolution'],
      );
    }

    // If not using custom extension validation, ensure this is an image.
    $supported_extensions = array(
      'png',
      'gif',
      'jpg',
      'jpeg',
    );
    $extensions = isset($elements[$delta]['#upload_validators']['file_validate_extensions'][0]) ? $elements[$delta]['#upload_validators']['file_validate_extensions'][0] : implode(' ', $supported_extensions);
    $extensions = array_intersect(explode(' ', $extensions), $supported_extensions);
    $elements[$delta]['#upload_validators']['file_validate_extensions'][0] = implode(' ', $extensions);

    // Add all extra functionality provided by the image widget.
    $elements[$delta]['#process'][] = 'image_field_widget_process';
  }
  if ($field['cardinality'] == 1) {

    // If there's only one field, return it as delta 0.
    if (empty($elements[0]['#default_value']['fid'])) {
      $elements[0]['#description'] = theme('file_upload_help', array(
        'description' => field_filter_xss($instance['description']),
        'upload_validators' => $elements[0]['#upload_validators'],
      ));
    }
  }
  else {
    $elements['#file_upload_description'] = theme('file_upload_help', array(
      'upload_validators' => $elements[0]['#upload_validators'],
    ));
  }
  return $elements;
}