public function LayerSwitcher::preBuild in Openlayers 7.3

Invoked before an objects render array is built.

Mostly invoked by the map object.

Parameters

array $build: The array with the build information.

\Drupal\openlayers\Types\ObjectInterface $context: The context of the build. Mostly the map object.

Overrides Base::preBuild

File

src/Plugin/Control/LayerSwitcher/LayerSwitcher.php, line 73

Control: LayerSwitcher.

Class

LayerSwitcher

Class LayerSwitcher.

Namespace

Drupal\openlayers\Plugin\Control\LayerSwitcher

Code

public function preBuild(array &$build, ObjectInterface $context = NULL) {
  $map_id = $context
    ->getId();
  $layers = $this
    ->getOption('layers', array());
  $items = array();
  $map_layers = $context
    ->getObjects('layer');
  $element_type = $this
    ->getOption('multiselect', FALSE) ? 'checkbox' : 'radio';

  // Only handle layers available in the map and configured in the control.
  // @TODO: use Form API (with form_process_* and stuff)
  $labels = $this
    ->getOption('layer_labels', array());
  foreach ($map_layers as $i => $map_layer) {
    if (isset($layers[$map_layer
      ->getMachineName()])) {
      $classes = array(
        drupal_html_class($map_layer
          ->getMachineName()),
      );
      $checked = '';
      if ($element_type == 'checkbox') {
        if ($map_layer
          ->getOption('visible', 1)) {
          $checked = 'checked ';
          $classes[] = 'active';
        }
      }
      $label = $map_layer
        ->getName();
      if (isset($labels[$map_layer
        ->getMachineName()])) {
        $label = openlayers_i18n_string('openlayers:layerswitcher:' . $this
          ->getMachineName() . ':' . $map_layer
          ->getMachineName() . ':label', $labels[$map_layer
          ->getMachineName()], array(
          'sanitize' => TRUE,
        ));
      }
      $items[] = array(
        'data' => '<label><input type="' . $element_type . '" name="layer" ' . $checked . 'value="' . $map_layer
          ->getMachineName() . '">' . $label . '</label>',
        'id' => drupal_html_id($map_id . '-' . $map_layer
          ->getMachineName()),
        'class' => $classes,
      );
    }
  }
  $title = openlayers_i18n_string('openlayers:layerswitcher:' . $this
    ->getMachineName() . ':title', $this
    ->getOption('label', 'Layers'), array(
    'sanitize' => TRUE,
  ));
  $layerswitcher = array(
    '#theme' => 'item_list',
    '#type' => 'ul',
    '#title' => $title,
    '#items' => $items,
    '#attributes' => array(
      'id' => drupal_html_id($this
        ->getMachineName() . '-items'),
    ),
  );
  $this
    ->setOption('element', '<div id="' . drupal_html_id($this
    ->getMachineName()) . '" class="' . drupal_html_class($this
    ->getMachineName()) . ' layerswitcher">' . drupal_render($layerswitcher) . '</div>');

  // Allow the parent class to perform it's pre-build actions.
  parent::preBuild($build, $context);
}