@file form.inc Views' replacements for Drupal's form functions.

File

includes/form.inc, line 8

form.inc Views' replacements for Drupal's form functions.

Code

function _drupal_build_form($form_id, &$form_state) {
  // Ensure that we have some defaults.

  // These are defaults only; if already set they will not be overridden.
  $form_state += array('storage' => NULL, 'submitted' => FALSE, 'input' => $_POST, 'method' => 'post');

  $args = isset($form_state['args']) ? $form_state['args'] : array();
  $cacheable = FALSE;

  if (isset($_SESSION['batch_form_state'])) {
    // We've been redirected here after a batch processing : the form has
    // already been processed, so we grab the post-process $form_state value
    // and move on to form display. See _batch_finished() function.
    $form_state = $_SESSION['batch_form_state'];
    unset($_SESSION['batch_form_state']);
  }
  else {
    // If the incoming $_POST contains a form_build_id, we'll check the
    // cache for a copy of the form in question. If it's there, we don't
    // have to rebuild the form to proceed. In addition, if there is stored
    // form_state data from a previous step, we'll retrieve it so it can
    // be passed on to the form processing code.
    if (isset($_POST['form_id']) && $_POST['form_id'] == $form_id && !empty($_POST['form_build_id'])) {
      $form = form_get_cache($_POST['form_build_id'], $form_state);
      if (!empty($form['#no_cache']) || empty($form)) {
        unset($form);
      }
    }

    // If the previous bit of code didn't result in a populated $form
    // object, we're hitting the form for the first time and we need
    // to build it from scratch.
    if (!isset($form)) {
      $form_state['post'] = $form_state['input'];
      // Use a copy of the function's arguments for manipulation
      $args_temp = $args;
      $args_temp[0] = &$form_state;
      array_unshift($args_temp, $form_id);

      $form = call_user_func_array('drupal_retrieve_form', $args_temp);
      $form_build_id = 'form-' . md5(mt_rand());
      $form['#build_id'] = $form_build_id;

      if ($form_state['method'] == 'get' && !isset($form['#method'])) {
        $form['#method'] = 'get';
      }

      drupal_prepare_form($form_id, $form, $form_state);
      // Store a copy of the unprocessed form for caching and indicate that it
      // is cacheable if #cache will be set.
      $original_form = $form;
      $cacheable = TRUE;
      unset($form_state['post']);
    }
    $form['#post'] = $form_state['input'];

    // Now that we know we have a form, we'll process it (validating,
    // submitting, and handling the results returned by its submission
    // handlers. Submit handlers accumulate data in the form_state by
    // altering the $form_state variable, which is passed into them by
    // reference.
    drupal_process_form_new($form_id, $form, $form_state);

    // If we were told not to redirect, but not told to re-render, return
    // here.
    if (!empty($form_state['executed']) && empty($form_state['rerender'])) {
      return;
    }

    if ($cacheable && !empty($form['#cache']) && empty($form['#no_cache'])) {
      // Caching is done past drupal_process_form so #process callbacks can
      // set #cache. By not sending the form state, we avoid storing
      // $form_state['storage'].
      form_set_cache($form_build_id, $original_form, NULL);
    }
  }

  // Most simple, single-step forms will be finished by this point --
  // drupal_process_form() usually redirects to another page (or to
  // a 'fresh' copy of the form) once processing is complete. If one
  // of the form's handlers has set $form_state['redirect'] to FALSE,
  // the form will simply be re-rendered with the values still in its
  // fields.
  //
  // If $form_state['storage'] or $form_state['rebuild'] have been
  // set by any submit or validate handlers, however, we know that
  // we're in a complex multi-part process of some sort and the form's
  // workflow is NOT complete. We need to construct a fresh copy of
  // the form, passing in the latest $form_state in addition to any
  // other variables passed into drupal_get_form().

  if (!empty($form_state['rebuild']) || !empty($form_state['storage'])) {
    $form = drupal_rebuild_form_new($form_id, $form_state, $args);
  }

  // If we haven't redirected to a new location by now, we want to
  // render whatever form array is currently in hand.
  return drupal_render_form($form_id, $form);
}