Allow custom view modes to display the print link

Hello,

it looks like apart from 'full' and 'teaser' view modes, the print link cannot be displayed, indeed:

<?php
function print_ui_link_allowed($link, $args) {
  if (isset($args['view_mode'])) {
    $view_mode = $args['view_mode'];
    if ((($view_mode == 'teaser') && !variable_get('print_' . $link['format'] . '_link_teaser', PRINT_UI_LINK_TEASER_DEFAULT))
      || !in_array($view_mode, array('full', 'teaser'))) {
      // If the teaser link is disabled
      return FALSE;
    }
  }
  $link_allowed_func = $link['module'] . '_link_allowed';
?>

this

<?php
!in_array($view_mode, array('full', 'teaser'))
?>

systematically returns false for a custom view mode, so even though you define a custom condition using hook_link_allowed, it is never called...
and even though it would pass this check, module has to actually also implement hook_print_link and define its own table for

<?php
function print_ui_node_load($nodes, $types) {
...
$result = db_query('SELECT nid, link, comments, url_list FROM {' . $module . '_node_conf} WHERE nid IN (:nids)', array(':nids' => $ids))->fetchAllAssoc('nid');
?>

to pass.

that's quite heavy to simply display a basic print link...
please remove this part of the condition as it is very restrictive and does not correspond to the comment below (teaser link is disabled).