/**
* Merges the values of another bubbleable metadata object with this one.
*
* @param \Drupal\Core\Render\BubbleableMetadata $other
* The other bubbleable metadata object.
* @return static
* A new bubbleable metadata object, with the merged data.
*
* @todo Add unit test for this in
* \Drupal\Tests\Core\Render\BubbleableMetadataTest when
* drupal_merge_attached() no longer is a procedural function and remove
* the '@codeCoverageIgnore' annotation.
*/
public function merge(BubbleableMetadata $other)
{
$result = new BubbleableMetadata();
$result->contexts = Cache::mergeContexts($this->contexts, $other->contexts);
$result->tags = Cache::mergeTags($this->tags, $other->tags);
$result->maxAge = Cache::mergeMaxAges($this->maxAge, $other->maxAge);
$result->attached = Renderer::mergeAttachments($this->attached, $other->attached);
$result->postRenderCache = NestedArray::mergeDeep($this->postRenderCache, $other->postRenderCache);
return $result;
}
/**
* Add an AJAX command to the response.
*
* @param \Drupal\Core\Ajax\CommandInterface $command
* An AJAX command object implementing CommandInterface.
* @param boolean $prepend
* A boolean which determines whether the new command should be executed
* before previously added commands. Defaults to FALSE.
*
* @return AjaxResponse
* The current AjaxResponse.
*/
public function addCommand(CommandInterface $command, $prepend = FALSE)
{
if ($prepend) {
array_unshift($this->commands, $command->render());
} else {
$this->commands[] = $command->render();
}
if ($command instanceof CommandWithAttachedAssetsInterface) {
$assets = $command->getAttachedAssets();
$attachments = ['library' => $assets->getLibraries(), 'drupalSettings' => $assets->getSettings()];
$attachments = Renderer::mergeAttachments($this->attachments, $attachments);
$this->setAttachments($attachments);
}
return $this;
}
