Purpose: this function queries all modules currently enabled on the site looking for custom handlers and returns a list of all available handerls. The base View handlers are also included.

Return value

Returns an array of handler names

Related topics

File

tripal_views/includes/tripal_views_integration_UI.inc, line 1348

Functions related to the UI for integrating tables with views

Code

function tripal_views_integration_discover_handlers() {

  $handlers = array();

  // Get handlers from all modules.
  foreach (module_implements('views_handlers') as $module) {
    $function = $module . '_views_handlers';
    $result = $function();
    if (!is_array($result)) {
      continue;
    }
    foreach ($result['handlers'] as $handler => $parent) {
      $handlers[] = $handler;
    }
  }

  // these handlers are hard coded because I could not
  // get the views_handlers() function to be called
  // in the code above.  However, we will be creating
  // Chado wrappers for many of these and once that work
  // is done these will no longer be needed.

  // argument handlers
  $handlers[] = 'views_handler_argument';
  $handlers[] = 'views_handler_argument_numeric';
  $handlers[] = 'views_handler_argument_formula';
  $handlers[] = 'views_handler_argument_date';
  $handlers[] = 'views_handler_argument_string';
  $handlers[] = 'views_handler_argument_many_to_one';
  $handlers[] = 'views_handler_argument_null';

  // field handlers
  $handlers[] = 'views_handler_field';
  $handlers[] = 'views_handler_field_date';
  $handlers[] = 'views_handler_field_boolean';
  $handlers[] = 'views_handler_field_markup';
  $handlers[] = 'views_handler_field_xss';
  $handlers[] = 'views_handler_field_url';
  $handlers[] = 'views_handler_field_file_size';
  $handlers[] = 'views_handler_field_prerender_list';
  $handlers[] = 'views_handler_field_numeric';
  $handlers[] = 'views_handler_field_custom';
  $handlers[] = 'views_handler_field_counter';

  // filter handlers
  $handlers[] = 'views_handler_filter';
  $handlers[] = 'views_handler_filter_equality';
  $handlers[] = 'views_handler_filter_string';
  $handlers[] = 'views_handler_filter_boolean_operator';
  $handlers[] = 'views_handler_filter_boolean_operator_string';
  $handlers[] = 'views_handler_filter_in_operator';
  $handlers[] = 'views_handler_filter_numeric';
  $handlers[] = 'views_handler_filter_date';
  $handlers[] = 'views_handler_filter_many_to_one';

  // relationship handlers
  $handlers[] = 'views_handler_relationship';

  // sort handlers
  $handlers[] = 'views_handler_sort';
  $handlers[] = 'views_handler_sort_formula';
  $handlers[] = 'views_handler_sort_date';
  $handlers[] = 'views_handler_sort_menu_hierarchy';
  $handlers[] = 'views_handler_sort_random';

  // join handler
  $handlers[] = 'views_join';

  return $handlers;
}