Commit 5072c181 authored by catch's avatar catch
Browse files

Issue #2203239 by YesCT, dawehner: Remove ajax_render and co.

parent f0ed86e7
......@@ -5,8 +5,6 @@
* Functions for use with Drupal's Ajax framework.
use Drupal\Component\Utility\Json;
* @defgroup ajax Ajax framework
* @{
......@@ -227,152 +225,6 @@
* See @link ajax_commands Ajax framework commands @endlink
* Renders a commands array into JSON.
* @param $commands
* A list of macro commands generated by the use of ajax_command_*()
* functions.
function ajax_render($commands = array()) {
// Ajax responses aren't rendered with html.html.twig, so we have to call
// drupal_get_css() and drupal_get_js() here, in order to have new files added
// during this request to be loaded by the page. We only want to send back
// files that the page hasn't already loaded, so we implement simple diffing
// logic using array_diff_key().
foreach (array('css', 'js') as $type) {
// It is highly suspicious if $_POST['ajax_page_state'][$type] is empty,
// since the base page ought to have at least one JS file and one CSS file
// loaded. It probably indicates an error, and rather than making the page
// reload all of the files, instead we return no new files.
if (!\Drupal::request()->request->get("ajax_page_state[$type]", NULL, TRUE)) {
$items[$type] = array();
else {
$function = '_drupal_add_' . $type;
$items[$type] = $function();
\Drupal::moduleHandler()->alter($type, $items[$type]);
// @todo Inline CSS and JS items are indexed numerically. These can't be
// reliably diffed with array_diff_key(), since the number can change
// due to factors unrelated to the inline content, so for now, we strip
// the inline items from Ajax responses, and can add support for them
// when _drupal_add_css() and _drupal_add_js() are changed to use a hash
// of the inline content as the array key.
foreach ($items[$type] as $key => $item) {
if (is_numeric($key)) {
// Ensure that the page doesn't reload what it already has.
$items[$type] = array_diff_key($items[$type], $_POST['ajax_page_state'][$type]);
// Render the HTML to load these files, and add AJAX commands to insert this
// HTML in the page. We pass TRUE as the $skip_alter argument to prevent the
// data from being altered again, as we already altered it above. Settings are
// handled separately, afterwards.
if (isset($items['js']['settings'])) {
$styles = drupal_get_css($items['css'], TRUE);
$scripts_footer = drupal_get_js('footer', $items['js'], TRUE);
$scripts_header = drupal_get_js('header', $items['js'], TRUE);
$extra_commands = array();
if (!empty($styles)) {
$extra_commands[] = ajax_command_add_css($styles);
if (!empty($scripts_header)) {
$extra_commands[] = ajax_command_prepend('head', $scripts_header);
if (!empty($scripts_footer)) {
$extra_commands[] = ajax_command_append('body', $scripts_footer);
if (!empty($extra_commands)) {
$commands = array_merge($extra_commands, $commands);
// Now add a command to merge changes and additions to drupalSettings.
$scripts = _drupal_add_js();
if (!empty($scripts['settings'])) {
$settings = drupal_merge_js_settings($scripts['settings']['data']);
array_unshift($commands, ajax_command_settings($settings, TRUE));
// Allow modules to alter any Ajax response.
\Drupal::moduleHandler()->alter('ajax_render', $commands);
return Json::encode($commands);
* Converts the return value of a page callback into an Ajax commands array.
* @param $page_callback_result
* The result of a page callback. Can be one of:
* - NULL: to indicate no content.
* - An integer menu status constant: to indicate an error condition.
* - A string of HTML content.
* - A renderable array of content.
* @return
* An Ajax commands array that can be passed to ajax_render().
function ajax_prepare_response($page_callback_result) {
$commands = array();
if (!isset($page_callback_result)) {
// Simply delivering an empty commands array is sufficient. This results
// in the Ajax request being completed, but nothing being done to the page.
elseif (is_int($page_callback_result)) {
switch ($page_callback_result) {
$commands[] = ajax_command_alert(t('The requested page could not be found.'));
$commands[] = ajax_command_alert(t('You are not authorized to access this page.'));
$commands[] = ajax_command_alert(filter_xss_admin(t(\Drupal::config('system.maintenance')->get('message'), array('@site' => \Drupal::config('')->get('name')))));
elseif (is_array($page_callback_result) && isset($page_callback_result['#type']) && ($page_callback_result['#type'] == 'ajax')) {
// Complex Ajax callbacks can return a result that contains an error message
// or a specific set of commands to send to the browser.
$page_callback_result += element_info('ajax');
$error = $page_callback_result['#error'];
if (isset($error) && $error !== FALSE) {
if ((empty($error) || $error === TRUE)) {
$error = t('An error occurred while handling the request: The server received invalid input.');
$commands[] = ajax_command_alert($error);
else {
$commands = $page_callback_result['#commands'];
else {
// Like normal page callbacks, simple Ajax callbacks can return HTML
// content, as a string or render array. This HTML is inserted in some
// relationship to #ajax['wrapper'], as determined by which jQuery DOM
// manipulation method is used. The method used is specified by
// #ajax['method']. The default method is 'replaceWith', which completely
// replaces the old wrapper element and its content with the new HTML.
$html = is_string($page_callback_result) ? $page_callback_result : drupal_render($page_callback_result);
$commands[] = ajax_command_insert(NULL, $html);
// Add the status messages inside the new content's wrapper element, so that
// on subsequent Ajax requests, it is treated as old content.
$status_messages = array('#theme' => 'status_messages');
$commands[] = ajax_command_prepend(NULL, drupal_render($status_messages));
return $commands;
* Form element processing handler for the #ajax form property.
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