function views_exposed_form_ajax_enable

Checks whether the exposed form will use AJAX.

Passes required form information removed in views_form_views_exposed_form_alter().

Parameters

array $form: The form being processed.

array $form_state: The form state.

Return value

array The form being processed.

File

./views.module, line 2221

Code

function views_exposed_form_ajax_enable(array &$form, array &$form_state) {
    // In order for AJAX to work the form build info is needed. Here check if
    // #ajax has been added to any form elements, and if so, pass this info as
    // settings via JavaScript, which get attached to the submitted form on AJAX
    // form submissions. #ajax property can be set not only for the first level of
    // the form, so look for it in the whole form.
    $ajax_info = array();
    $ajax_elements = views_exposed_form_ajax_lookup_recursive($form);
    // Determine if form is being processed.
    $triggering_element_name = '';
    if (!empty($form_state['input']['_triggering_element_name'])) {
        $triggering_element_name = $form_state['input']['_triggering_element_name'];
    }
    // When there are multiple elements with #ajax set on exposed form, pass only
    // triggering element name to JavaScript, otherwise #ajax will work only for
    // the first element.
    if (!empty($triggering_element_name) && !empty($ajax_elements)) {
        // Check if element has #ajax property set.
        if (in_array($triggering_element_name, $ajax_elements)) {
            $ajax_elements = array(
                $triggering_element_name => $triggering_element_name,
            );
        }
        else {
            $ajax_elements = array();
        }
    }
    if (!empty($ajax_elements)) {
        $form_info = array(
            'form_id' => $form['#form_id'],
            'form_build_id' => $form['#build_id'],
        );
        // Anonymous users don't get a token.
        if (!empty($form['#token'])) {
            $form_info['form_token'] = drupal_get_token($form['#token']);
        }
        foreach ($ajax_elements as $element_name) {
            $ajax_info[$element_name] = $form_info;
        }
        drupal_add_js(array(
            'ViewsExposedFormInfo' => $ajax_info,
        ), 'setting');
        // Add the javascript behavior that will handle this data.
        $form['#attached']['js'][] = array(
            'weight' => 100,
            'data' => drupal_get_path('module', 'views') . '/js/exposed-form-ajax.js',
        );
    }
    return $form;
}