Using block_node_visibility with views pages

Howdy,

I wanted to restrict a block to display on both all nodes of a specific content type, and on a specific view page.

Since block_node_visibility doesn't play nicely with page-specific visibility settings, I decided to implement hook_block_node_visibility in a helper module, to add views to the list of options.

Here's an example of programmatically adding all views pages to the list of block_node_visibilty checkboxes:

function example_helper_block_node_visibility($op, $types = array(), $node = NULL) {
  switch ($op) {
    case 'type':
      $views_options = array();
      $views = views_get_all_views();
      foreach ($views as $view) {
        if (! $view->disabled) {
          foreach ($view->display as $display) {
            if ($display->display_plugin == 'page'
                // exclude administrative views
                && strpos($display->display_options['path'], 'admin/') !== 0) { 
              // prepend 'view_' to the index to avoid collision when a content type and a view path have the same name
              $index = 'view_' . $display->display_options['path'];
              $name = 'View: ' . $display->display_title;
              $views_options[$index] = $name;
            }
          }
        }
      }
      return array($views_options);
      break;
    case 'visibility':
      foreach ($types as $type) {
        if (strpos($type, 'view_') === 0) {
          // remove prepended 'view_'
          $type = substr($type, 5);
          if (strpos($_GET['q'], $type) === 0) {
            return TRUE;
          }
        }
      }
      return FALSE;
      break;
  }
}