/**
* Additional #pre_render callback for 'text_format' elements.
*/
function preRenderTextFormat(array $element)
{
// Allow modules to programmatically enforce no client-side editor by
// setting the #editor property to FALSE.
if (isset($element['#editor']) && !$element['#editor']) {
return $element;
}
// filter_process_format() copies properties to the expanded 'value' child
// element, including the #pre_render property. Skip this text format
// widget, if it contains no 'format'.
if (!isset($element['format'])) {
return $element;
}
$format_ids = array_keys($element['format']['format']['#options']);
// Early-return if no text editor is associated with any of the text formats.
$editors = Editor::loadMultiple($format_ids);
if (count($editors) === 0) {
return $element;
}
// Use a hidden element for a single text format.
$field_id = $element['value']['#id'];
if (!$element['format']['format']['#access']) {
// Use the first (and only) available text format.
$format_id = $format_ids[0];
$element['format']['editor'] = array('#type' => 'hidden', '#name' => $element['format']['format']['#name'], '#value' => $format_id, '#attributes' => array('class' => array('editor'), 'data-editor-for' => $field_id));
} else {
$element['format']['format']['#attributes']['class'][] = 'editor';
$element['format']['format']['#attributes']['data-editor-for'] = $field_id;
}
// Hide the text format's filters' guidelines of those text formats that have
// a text editor associated: they're rather useless when using a text editor.
foreach ($editors as $format_id => $editor) {
$element['format']['guidelines'][$format_id]['#access'] = FALSE;
}
// Attach Text Editor module's (this module) library.
$element['#attached']['library'][] = 'editor/drupal.editor';
// Attach attachments for all available editors.
$element['#attached'] = drupal_merge_attached($element['#attached'], $this->pluginManager->getAttachments($format_ids));
// Apply XSS filters when editing content if necessary. Some types of text
// editors cannot guarantee that the end user won't become a victim of XSS.
if (!empty($element['value']['#value'])) {
$original = $element['value']['#value'];
$format = FilterFormat::load($element['format']['format']['#value']);
// Ensure XSS-safety for the current text format/editor.
$filtered = editor_filter_xss($original, $format);
if ($filtered !== FALSE) {
$element['value']['#value'] = $filtered;
}
// Only when the user has access to multiple text formats, we must add data-
// attributes for the original value and change tracking, because they are
// only necessary when the end user can switch between text formats/editors.
if ($element['format']['format']['#access']) {
$element['value']['#attributes']['data-editor-value-is-changed'] = 'false';
$element['value']['#attributes']['data-editor-value-original'] = $original;
}
}
return $element;
}