function InputRequired::preRender

Overrides ExposedFormPluginBase::preRender

File

core/modules/views/src/Plugin/views/exposed_form/InputRequired.php, line 71

Class

InputRequired

Exposed form plugin that provides an exposed form with required input.

Namespace

Code

public function preRender($values) {
    // Display the "text on demand" if needed. This is a site builder-defined
    // text to display instead of results until the user selects and applies
    // an exposed filter.
    if (!$this->exposedFilterApplied()) {
        $options = [
            'id' => 'area',
            'table' => 'views',
            'field' => 'area',
            'label' => '',
            'relationship' => 'none',
            'group_type' => 'group',
            // We need to set the "Display even if view has no result" option to
            // TRUE as the input required exposed form plugin will always force an
            // empty result if no exposed filters are applied.
'empty' => TRUE,
            'content' => [
                // @see \Drupal\views\Plugin\views\area\Text::render()
'value' => $this->options['text_input_required'],
                'format' => $this->options['text_input_required_format'],
            ],
        ];
        $handler = Views::handlerManager('area')->getHandler($options);
        $handler->init($this->view, $this->displayHandler, $options);
        $this->displayHandler->handlers['empty'] = [
            'area' => $handler,
        ];
        // Override the existing empty result message (if applicable).
        $this->displayHandler
            ->setOption('empty', [
            'text' => $options,
        ]);
    }
}