Same name in other branches

1. 9 core/lib/Drupal/Core/Render/Element/Tableselect.php \Drupal\Core\Render\Element\Tableselect::preRenderTableselect()
2. 10 core/lib/Drupal/Core/Render/Element/Tableselect.php \Drupal\Core\Render\Element\Tableselect::preRenderTableselect()
3. 11.x core/lib/Drupal/Core/Render/Element/Tableselect.php \Drupal\Core\Render\Element\Tableselect::preRenderTableselect()

Prepares a 'tableselect' #type element for rendering.

Adds a column of radio buttons or checkboxes for each row of a table.

Parameters

array $element: An associative array containing the properties and children of the tableselect element. Properties used: #header, #options, #empty, and #js_select. The #options property is an array of selection options; each array element of #options is an array of properties. These properties can include #attributes, which is added to the table row's HTML attributes; see table.html.twig. An example of per-row options:

$options = array(
    array(
        'title' => $this->t('How to Learn Drupal'),
        'content_type' => $this->t('Article'),
        'status' => 'published',
        '#attributes' => array(
            'class' => array(
                'article-row',
            ),
        ),
    ),
    array(
        'title' => $this->t('Privacy Policy'),
        'content_type' => $this->t('Page'),
        'status' => 'published',
        '#attributes' => array(
            'class' => array(
                'page-row',
            ),
        ),
    ),
);
$header = array(
    'title' => $this->t('Title'),
    'content_type' => $this->t('Content type'),
    'status' => $this->t('Status'),
);
$form['table'] = array(
    '#type' => 'tableselect',
    '#header' => $header,
    '#options' => $options,
    '#empty' => $this->t('No content available.'),
);

Return value

array The processed element.

File

core/lib/Drupal/Core/Render/Element/Tableselect.php, line 149

Class

Tableselect

Provides a form element for a table with radios or checkboxes in left column.

Namespace

Drupal\Core\Render\Element

Code

public static function preRenderTableselect($element) {
    $rows = [];
    $header = $element['#header'];
    if (!empty($element['#options'])) {
        // Generate a table row for each selectable item in #options.
        foreach (Element::children($element) as $key) {
            $row = [];
            $row['data'] = [];
            if (isset($element['#options'][$key]['#attributes'])) {
                $row += $element['#options'][$key]['#attributes'];
            }
            // Render the checkbox / radio element.
            $row['data'][] = \Drupal::service('renderer')->render($element[$key]);
            // As table.html.twig only maps header and row columns by order, create
            // the correct order by iterating over the header fields.
            foreach ($element['#header'] as $fieldname => $title) {
                // A row cell can span over multiple headers, which means less row
                // cells than headers could be present.
                if (isset($element['#options'][$key][$fieldname])) {
                    // A header can span over multiple cells and in this case the cells
                    // are passed in an array. The order of this array determines the
                    // order in which they are added.
                    if (is_array($element['#options'][$key][$fieldname]) && !isset($element['#options'][$key][$fieldname]['data'])) {
                        foreach ($element['#options'][$key][$fieldname] as $cell) {
                            $row['data'][] = $cell;
                        }
                    }
                    else {
                        $row['data'][] = $element['#options'][$key][$fieldname];
                    }
                }
            }
            $rows[] = $row;
        }
        // Add an empty header or a "Select all" checkbox to provide room for the
        // checkboxes/radios in the first table column.
        if ($element['#js_select']) {
            // Add a "Select all" checkbox.
            $element['#attached']['library'][] = 'core/drupal.tableselect';
            array_unshift($header, [
                'class' => [
                    'select-all',
                ],
            ]);
        }
        else {
            // Add an empty header when radio buttons are displayed or a "Select all"
            // checkbox is not desired.
            array_unshift($header, '');
        }
    }
    $element['#header'] = $header;
    $element['#rows'] = $rows;
    return $element;
}

---