function diff_form_alter in Diff 6

Same name and namespace in other branches

1. 5.2 diff.module \diff_form_alter()
2. 5 diff.module \diff_form_alter()
3. 6.2 diff.module \diff_form_alter()
4. 7.2 diff.module \diff_form_alter()

Implementation of hook_form_alter(). Used to add a 'Preview changes' button on the node edit form.

File

./diff.module, line 451

Provides functionality to show a diff between two node revisions.

Code

function diff_form_alter(&$form, $form_state, $form_id) {
  if (isset($form['type']['#value']) && $form['type']['#value'] . '_node_form' == $form_id) {

    // Node editing form.
    // Add a 'Preview changes' button.
    if (variable_get('show_preview_changes_' . $form['type']['#value'], TRUE) && $form['nid']['#value'] > 0) {
      $form['buttons']['preview_changes'] = array(
        '#type' => 'submit',
        '#value' => t('Preview changes'),
        '#weight' => 12,
        '#submit' => array(
          'diff_node_form_build_preview_changes',
        ),
      );
    }
  }
  elseif ($form_id == 'node_type_form' && isset($form['identity']['type'])) {

    // Node type edit form.
    // Add checkbox to activate 'Preview changes' button per node type.
    $form['workflow']['show_preview_changes'] = array(
      '#type' => 'checkbox',
      '#title' => t('Show %preview_changes button on node edit form', array(
        '%preview_changes' => t('Preview changes'),
      )),
      '#prefix' => '<strong>' . t('Preview changes') . '</strong>',
      '#weight' => 10,
      '#default_value' => variable_get('show_preview_changes_' . $form['#node_type']->type, TRUE),
    );
  }
}