function taxonomy_revision_taxonomy_revisions_validate in Taxonomy revision 7

Validation for input form to select two revisions.

File

./taxonomy_revision.pages.inc, line 571

UI pages for revisions, similar with pages from node.pages.inc.

Code

function taxonomy_revision_taxonomy_revisions_validate($form, &$form_state) {
  $old_vid = $form_state['values']['old'];
  $new_vid = $form_state['values']['new'];
  if ($old_vid == $new_vid || !$old_vid || !$new_vid) {
    form_set_error('diff', t('Select different revisions to compare.'));
  }
}