function Combine::buildOptionsForm

Overrides FilterPluginBase::buildOptionsForm

File

core/modules/views/src/Plugin/views/filter/Combine.php, line 28

Class

Combine

Filter handler which allows to search on multiple fields.

Namespace

Code

public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    parent::buildOptionsForm($form, $form_state);
    $this->view
        ->initStyle();
    // Allow to choose all fields as possible
    if ($this->view->style_plugin
        ->usesFields()) {
        $options = [];
        foreach ($this->view->display_handler
            ->getHandlers('field') as $name => $field) {
            // Only allow clickSortable fields. Fields without clickSorting will
            // probably break in the Combine filter.
            if ($field->clickSortable()) {
                $options[$name] = $field->adminLabel(TRUE);
            }
        }
        if ($options) {
            $form['fields'] = [
                '#type' => 'select',
                '#title' => $this->t('Choose fields to combine for filtering'),
                '#description' => $this->t("This filter doesn't work for very special field handlers."),
                '#multiple' => TRUE,
                '#options' => $options,
                '#default_value' => $this->options['fields'],
            ];
        }
        else {
            $form_state->setErrorByName('', $this->t('You have to add some fields to be able to use this filter.'));
        }
    }
}