form.inc

<?php


/**
 * @file form.inc
 * Views' replacements for Drupal's form functions.
 *
 */
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);
}

/**
 * Views' replacement of drupal_rebuild_form.
 *
 * This change merely respects a form's wishes not to be cached.
 */
function drupal_rebuild_form_new($form_id, &$form_state, $args, $form_build_id = NULL) {
    // Remove the first argument. This is $form_id.when called from
    // drupal_get_form and the original $form_state when called from some AHAH
    // callback. Neither is needed. After that, put in the current state.
    $args[0] =& $form_state;
    // And the form_id.
    array_unshift($args, $form_id);
    $form = call_user_func_array('drupal_retrieve_form', $args);
    if (!isset($form_build_id)) {
        // We need a new build_id for the new version of the form.
        $form_build_id = 'form-' . md5(mt_rand());
    }
    $form['#build_id'] = $form_build_id;
    drupal_prepare_form($form_id, $form, $form_state);
    if (empty($form['#no_cache'])) {
        // Now, we cache the form structure so it can be retrieved later for
        // validation. If $form_state['storage'] is populated, we'll also cache
        // it so that it can be used to resume complex multi-step processes.
        form_set_cache($form_build_id, $form, $form_state);
    }
    // Originally this called drupal_process_form, but all that happens there
    // is form_builder and then submission; and the rebuilt form is not
    // allowed to submit. Therefore, just do this:
    $form['#post'] = $form_state['input'];
    $form = form_builder($form_id, $form, $form_state);
    return $form;
}

/**
 * Views' replacement for drupal_process_form that accepts commands
 * not to redirect, as well as forcing processing of 'get' method forms.
 */
function drupal_process_form_new($form_id, &$form, &$form_state) {
    // 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.
    $form_state['values'] = array();
    // With $_GET, these forms are always submitted.
    if ($form_state['method'] == 'get') {
        if (!isset($form['#post']['form_build_id'])) {
            $form['#post']['form_build_id'] = $form['#build_id'];
        }
        if (!isset($form['#post']['form_id'])) {
            $form['#post']['form_id'] = $form_id;
        }
        if (!isset($form['#post']['form_token']) && isset($form['#token'])) {
            $form['#post']['form_token'] = drupal_get_token($form['#token']);
        }
    }
    $form = form_builder($form_id, $form, $form_state);
    // Only process the form if it is programmed or the form_id coming
    // from the POST data is set and matches the current form_id.
    if (!empty($form['#programmed']) || !empty($form['#post']) && (isset($form['#post']['form_id']) && $form['#post']['form_id'] == $form_id)) {
        drupal_validate_form_new($form_id, $form, $form_state);
        // form_clean_id() maintains a cache of element IDs it has seen,
        // so it can prevent duplicates. We want to be sure we reset that
        // cache when a form is processed, so scenerios that result in
        // the form being built behind the scenes and again for the
        // browser don't increment all the element IDs needlessly.
        form_clean_id(NULL, TRUE);
        if (!empty($form_state['submitted']) && !form_get_errors() && empty($form_state['rebuild'])) {
            $form_state['redirect'] = NULL;
            form_execute_handlers('submit', $form, $form_state);
            // We'll clear out the cached copies of the form and its stored data
            // here, as we've finished with them. The in-memory copies are still
            // here, though.
            if (variable_get('cache', CACHE_DISABLED) == CACHE_DISABLED && !empty($form_state['values']['form_build_id'])) {
                cache_clear_all('form_' . $form_state['values']['form_build_id'], 'cache_form');
                cache_clear_all('storage_' . $form_state['values']['form_build_id'], 'cache_form');
            }
            // If batches were set in the submit handlers, we process them now,
            // possibly ending execution. We make sure we do not react to the batch
            // that is already being processed (if a batch operation performs a
            // drupal_execute).
            if (($batch =& batch_get()) && !isset($batch['current_set'])) {
                // The batch uses its own copies of $form and $form_state for
                // late execution of submit handers and post-batch redirection.
                $batch['form'] = $form;
                $batch['form_state'] = $form_state;
                $batch['progressive'] = !$form['#programmed'];
                batch_process();
                // Execution continues only for programmatic forms.
                // For 'regular' forms, we get redirected to the batch processing
                // page. Form redirection will be handled in _batch_finished(),
                // after the batch is processed.
            }
            // If no submit handlers have populated the $form_state['storage']
            // bundle, and the $form_state['rebuild'] flag has not been set,
            // we're finished and should redirect to a new destination page
            // if one has been set (and a fresh, unpopulated copy of the form
            // if one hasn't). If the form was called by drupal_execute(),
            // however, we'll skip this and let the calling function examine
            // the resulting $form_state bundle itself.
            if (!$form['#programmed'] && empty($form_state['rebuild']) && empty($form_state['storage'])) {
                if (!empty($form_state['no_redirect'])) {
                    $form_state['executed'] = TRUE;
                }
                else {
                    drupal_redirect_form($form, $form_state['redirect']);
                }
            }
        }
    }
}

/**
 * The original version of drupal_validate_form does not have an override for
 * the static check to only validate a form id once. Unfortunately, we need
 * to be able to overridet his.
 */
function drupal_validate_form_new($form_id, $form, &$form_state) {
    static $validated_forms = array();
    if (isset($validated_forms[$form_id]) && empty($form_state['must_validate'])) {
        return;
    }
    // If the session token was set by drupal_prepare_form(), ensure that it
    // matches the current user's session.
    if (isset($form['#token'])) {
        if (!drupal_valid_token($form_state['values']['form_token'], $form['#token'])) {
            // Setting this error will cause the form to fail validation.
            form_set_error('form_token', t('Validation error, please try again. If this error persists, please contact the site administrator.'));
        }
    }
    _form_validate($form, $form_state, $form_id);
    $validated_forms[$form_id] = TRUE;
}

/**
 * Process callback to add dependency to form items.
 *
 * Usage:
 *
 * On any form item, add
 * - @code '#process' => 'views_process_dependency' @endcode
 * - @code '#dependency' => array('id-of-form-without-the-#' => array(list, of, values, that, make, this, gadget, visible)); @endcode
 */
function views_process_dependency($element, $edit, &$form_state, &$form) {
    static $dependencies;
    if (isset($element['#dependency']) && !isset($dependencies[$element['#id']])) {
        if (!isset($element['#dependency_count'])) {
            $element['#dependency_count'] = 1;
        }
        if (!empty($form_state['ajax'])) {
            $form_state['js settings']['viewsAjax']['formRelationships'][$element['#id']] = array(
                'num' => $element['#dependency_count'],
                'values' => $element['#dependency'],
            );
        }
        else {
            views_add_js('dependent');
            $options['viewsAjax']['formRelationships'][$element['#id']] = array(
                'num' => $element['#dependency_count'],
                'values' => $element['#dependency'],
            );
            drupal_add_js($options, 'setting');
        }
        $dependencies[$element['#id']] = TRUE;
    }
    return $element;
}

/**
 * #process callback to see if we need to check_plain() the options.
 *
 * Since FAPI is inconsistent, the #options are sanitized for you in all cases
 * _except_ checkboxes. We have form elements that are sometimes 'select' and
 * sometimes 'checkboxes', so we need decide late in the form rendering cycle
 * if the options need to be sanitized before they're rendered. This callback
 * inspects the type, and if it's still 'checkboxes', does the sanitation.
 */
function views_process_check_options($element, $edit, &$form_state, &$form) {
    if ($element['#type'] == 'checkboxes' || $element['#type'] == 'checkbox') {
        $element['#options'] = array_map('check_plain', $element['#options']);
    }
    return $element;
}