Support for extra webform components that use file field

Hi,

I'm developing a webform component based on the file component that adds support for using a webcam and also cropping the image.

The problem I have is that client side validation isn't triggered as my component isn't called "file" and the code in clientside_validation_webform_after_build_recurse() has a check that the webform component type is "file".

This is the code as is:

if (isset($element['#webform_component']) && $element['#webform_component']['type'] == 'file') {
  $file_children = element_children($element);
  if (count($file_children) > 0) {
    foreach ($file_children as $child) {
      $file_child = $element[$child];
      if (isset($file_child['#name']) && $file_child['#type'] == 'file') {
        $name = $file_child['#name'];
        _clientside_validation_set_required($name, $element['#title'], isset($element['#webform_component']['required']) ? (bool)$element['#webform_component']['required'] : FALSE, $js_rules);
        if (isset($element['#webform_component']['extra']['filtering']['types'])) {
          $extensions = $element['#webform_component']['extra']['filtering']['types'];
          _clientside_validation_set_extensions($name, $extensions, $js_rules);
        }
      }
    }
  }
}

I need a way to let client side validation know that there is a new webform component that should be treated as a file component.

Obviously I can just patch the code above to include a test for my component e.g.

if (isset($element['#webform_component']) &&
    ($element['#webform_component']['type'] == 'file' || $element['#webform_component']['type'] == 'MY_FILE_COMPONENT')) {
  ...
}

But I think it would be better if there was a hook that allowed my module to add it's component to a list of components that should trigger the above code, something like this:

function _clientside_validation_webform_get_file_components() {
  $file_components = &drupal_static(__FUNCTION__);
  
  if (empty($file_components)) {
    $file_components = array_merge(array('file'), module_invoke_all('clientside_validation_webform_file_components'));
  }
  
  return $file_components;
}

Then the original if statement then becomes:

if (isset($element['#webform_component']) && in_array($element['#webform_component']['type'], _clientside_validation_webform_get_file_components())) {
  ....
}

Then I just need to include the hook in my module like so:

function MYMODULE_clientside_validation_webform_file_components() {
  return array('MY_FILE_COMPONENT');
}

I've included a patch of the above changes.