/**
* Processes asset libraries into render arrays.
*
* @param array $attached
* The attachments to process.
* @param array $placeholders
* The placeholders that exist in the response.
*
* @return array
* An array keyed by asset type, with keys:
* - styles
* - scripts
* - scripts_bottom
*/
protected function processAssetLibraries(array $attached, array $placeholders)
{
$all_attached = ['#attached' => $attached];
$assets = AttachedAssets::createFromRenderArray($all_attached);
// Take Ajax page state into account, to allow for something like Turbolinks
// to be implemented without altering core.
// @see https://github.com/rails/turbolinks/
// @todo https://www.drupal.org/node/2497115 - Below line is broken due to ->request.
$ajax_page_state = $this->requestStack->getCurrentRequest()->request->get('ajax_page_state');
$assets->setAlreadyLoadedLibraries(isset($ajax_page_state) ? explode(',', $ajax_page_state['libraries']) : []);
$variables = [];
// Print styles - if present.
if (isset($placeholders['styles'])) {
// Optimize CSS if necessary, but only during normal site operation.
$optimize_css = !defined('MAINTENANCE_MODE') && $this->config->get('css.preprocess');
$variables['styles'] = $this->cssCollectionRenderer->render($this->assetResolver->getCssAssets($assets, $optimize_css));
}
// Print scripts - if any are present.
if (isset($placeholders['scripts']) || isset($placeholders['scripts_bottom'])) {
// Optimize JS if necessary, but only during normal site operation.
$optimize_js = !defined('MAINTENANCE_MODE') && !\Drupal::state()->get('system.maintenance_mode') && $this->config->get('js.preprocess');
list($js_assets_header, $js_assets_footer) = $this->assetResolver->getJsAssets($assets, $optimize_js);
$variables['scripts'] = $this->jsCollectionRenderer->render($js_assets_header);
$variables['scripts_bottom'] = $this->jsCollectionRenderer->render($js_assets_footer);
}
return $variables;
}
/**
* Prepares the AJAX commands to attach assets.
*
* @param \Drupal\Core\Ajax\AjaxResponse $response
* The AJAX response to update.
* @param \Symfony\Component\HttpFoundation\Request $request
* The request object that the AJAX is responding to.
*
* @return array
* An array of commands ready to be returned as JSON.
*/
protected function buildAttachmentsCommands(AjaxResponse $response, Request $request)
{
$ajax_page_state = $request->request->get('ajax_page_state');
// Aggregate CSS/JS if necessary, but only during normal site operation.
$optimize_css = !defined('MAINTENANCE_MODE') && $this->config->get('css.preprocess');
$optimize_js = !defined('MAINTENANCE_MODE') && $this->config->get('js.preprocess');
$attachments = $response->getAttachments();
// Resolve the attached libraries into asset collections.
$assets = new AttachedAssets();
$assets->setLibraries(isset($attachments['library']) ? $attachments['library'] : [])->setAlreadyLoadedLibraries(isset($ajax_page_state['libraries']) ? explode(',', $ajax_page_state['libraries']) : [])->setSettings(isset($attachments['drupalSettings']) ? $attachments['drupalSettings'] : []);
$css_assets = $this->assetResolver->getCssAssets($assets, $optimize_css);
list($js_assets_header, $js_assets_footer) = $this->assetResolver->getJsAssets($assets, $optimize_js);
// Render the HTML to load these files, and add AJAX commands to insert this
// HTML in the page. Settings are handled separately, afterwards.
$settings = [];
if (isset($js_assets_header['drupalSettings'])) {
$settings = $js_assets_header['drupalSettings']['data'];
unset($js_assets_header['drupalSettings']);
}
if (isset($js_assets_footer['drupalSettings'])) {
$settings = $js_assets_footer['drupalSettings']['data'];
unset($js_assets_footer['drupalSettings']);
}
// Prepend commands to add the assets, preserving their relative order.
$resource_commands = array();
if ($css_assets) {
$css_render_array = $this->cssCollectionRenderer->render($css_assets);
$resource_commands[] = new AddCssCommand((string) $this->renderer->renderPlain($css_render_array));
}
if ($js_assets_header) {
$js_header_render_array = $this->jsCollectionRenderer->render($js_assets_header);
$resource_commands[] = new PrependCommand('head', (string) $this->renderer->renderPlain($js_header_render_array));
}
if ($js_assets_footer) {
$js_footer_render_array = $this->jsCollectionRenderer->render($js_assets_footer);
$resource_commands[] = new AppendCommand('body', (string) $this->renderer->renderPlain($js_footer_render_array));
}
foreach (array_reverse($resource_commands) as $resource_command) {
$response->addCommand($resource_command, TRUE);
}
// Prepend a command to merge changes and additions to drupalSettings.
if (!empty($settings)) {
// During Ajax requests basic path-specific settings are excluded from
// new drupalSettings values. The original page where this request comes
// from already has the right values. An Ajax request would update them
// with values for the Ajax request and incorrectly override the page's
// values.
// @see system_js_settings_alter()
unset($settings['path']);
$response->addCommand(new SettingsCommand($settings, TRUE), TRUE);
}
$commands = $response->getCommands();
$this->moduleHandler->alter('ajax_render', $commands);
return $commands;
}
/**
* Processes asset libraries into render arrays.
*
* @param \Drupal\Core\Asset\AttachedAssetsInterface $assets
* The attached assets collection for the current response.
* @param array $placeholders
* The placeholders that exist in the response.
*
* @return array
* An array keyed by asset type, with keys:
* - styles
* - scripts
* - scripts_bottom
*/
protected function processAssetLibraries(AttachedAssetsInterface $assets, array $placeholders)
{
$variables = [];
// Print styles - if present.
if (isset($placeholders['styles'])) {
// Optimize CSS if necessary, but only during normal site operation.
$optimize_css = !defined('MAINTENANCE_MODE') && $this->config->get('css.preprocess');
$variables['styles'] = $this->cssCollectionRenderer->render($this->assetResolver->getCssAssets($assets, $optimize_css));
}
// Print scripts - if any are present.
if (isset($placeholders['scripts']) || isset($placeholders['scripts_bottom'])) {
// Optimize JS if necessary, but only during normal site operation.
$optimize_js = !defined('MAINTENANCE_MODE') && !\Drupal::state()->get('system.maintenance_mode') && $this->config->get('js.preprocess');
list($js_assets_header, $js_assets_footer) = $this->assetResolver->getJsAssets($assets, $optimize_js);
$variables['scripts'] = $this->jsCollectionRenderer->render($js_assets_header);
$variables['scripts_bottom'] = $this->jsCollectionRenderer->render($js_assets_footer);
}
return $variables;
}
/**
* {@inheritdoc}
*/
public function render(array $js_assets)
{
$this->dataCollector->addJsAsset($js_assets);
return $this->assetCollectionRenderer->render($js_assets);
}