protected AjaxResponseAttachmentsProcessor::buildAttachmentsCommands(AjaxResponse $response, Request $request)
Prepares the AJAX commands to attach assets.
Parameters
\Drupal\Core\Ajax\AjaxResponse $response: The AJAX response to update.
\Symfony\Component\HttpFoundation\Request $request: The request object that the AJAX is responding to.
Return value
array An array of commands ready to be returned as JSON.
File
- core/lib/Drupal/Core/Ajax/AjaxResponseAttachmentsProcessor.php, line 130
Class
- AjaxResponseAttachmentsProcessor
- Processes attachments of AJAX responses.
Namespace
Drupal\Core\Ajax
Code
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); // First, AttachedAssets::setLibraries() ensures duplicate libraries are // removed: it converts it to a set of libraries if necessary. Second, // AssetResolver::getJsSettings() ensures $assets contains the final set of // JavaScript settings. AttachmentsResponseProcessorInterface also mandates // that the response it processes contains the final attachment values, so // update both the 'library' and 'drupalSettings' attachments accordingly. $attachments['library'] = $assets->getLibraries(); $attachments['drupalSettings'] = $assets->getSettings(); $response->setAttachments($attachments); // 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); $resource_commands[] = new AddCssCommand($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', $this->renderer->renderPlain($js_header_render_array)); } if ($js_assets_footer) { $js_footer_render_array = $this->jsCollectionRenderer->render($js_assets_footer); $resource_commands[] = new AppendCommand('body', $this->renderer->renderPlain($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; }
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