View source  
  <?php
require_once __DIR__ . '/fiu.field.inc';
function fiu_theme() {
  return [
    
    'fine_image_widget' => [
      'render element' => 'element',
      'file' => 'fiu.field.inc',
    ],
    'fine_image_widget_unitary' => [
      'render element' => 'element',
      'file' => 'fiu.field.inc',
    ],
    'fine_image_widget_multiple' => [
      'render element' => 'element',
      'file' => 'fiu.field.inc',
    ],
  ];
}
function fiu_imce_supported_widgets_alter(&$widgets) {
  $widgets[] = 'fine_image';
}
function fiu_filefield_sources_widgets() {
  return [
    'fine_image',
  ];
}
function fiu_theme_registry_alter(&$theme_registry) {
  if (isset($theme_registry['filefield_sources_list'])) {
    $theme_registry['filefield_sources_list']['function'] = 'fiu_filefield_sources_list';
  }
}
function fiu_filefield_sources_list($variables) {
  $element = $variables['element'];
  $sources = $variables['sources'];
  $links = array();
  foreach ($sources as $name => $source) {
    $links[] = '<a href="#" onclick="return false;" title="' . $source['description'] . '" id="' . $element['#id'] . '-' . $name . '-source" class="filefield-source filefield-source-' . $name . '">' . $source['label'] . '</a>';
  }
  return '<div class="filefield-sources-list">' . implode('', $links) . '</div>';
}