limited browser support)"),
* label = @Translation("Clipboard"),
* description = @Translation("Allow users to paste a file directly from the clipboard."),
* weight = 1
* )
*/
class Clipboard implements FilefieldSourceInterface {
/**
* {@inheritdoc}
*/
public static function value(array &$element, &$input, FormStateInterface $form_state) {
if (isset($input['filefield_clipboard']['contents']) && strlen($input['filefield_clipboard']['contents']) > 0) {
// Check that the destination is writable.
$temporary_directory = 'temporary://';
if (!file_prepare_directory($temporary_directory, FILE_MODIFY_PERMISSIONS)) {
\Drupal::logger('filefield_sources')->log(E_NOTICE, 'The directory %directory is not writable, because it does not have the correct permissions set.', array('%directory' => drupal_realpath($temporary_directory)));
drupal_set_message(t('The file could not be transferred because the temporary directory is not writable.'), 'error');
return;
}
// Check that the destination is writable.
$directory = $element['#upload_location'];
$mode = Settings::get('file_chmod_directory', FILE_CHMOD_DIRECTORY);
// This first chmod check is for other systems such as S3, which don't
// work with file_prepare_directory().
if (!drupal_chmod($directory, $mode) && !file_prepare_directory($directory, FILE_CREATE_DIRECTORY)) {
$url = $input['filefield_clipboard']['filename'];
\Drupal::logger('filefield_sources')->log(E_NOTICE, 'File %file could not be copied, because the destination directory %destination is not configured correctly.', array('%file' => $url, '%destination' => drupal_realpath($directory)));
drupal_set_message(t('The specified file %file could not be copied, because the destination directory is not properly configured. This may be caused by a problem with file or directory permissions. More information is available in the system log.', array('%file' => $url)), 'error');
return;
}
// Split the file information in mimetype and base64 encoded binary.
$base64_data = $input['filefield_clipboard']['contents'];
$comma_position = strpos($base64_data, ',');
$semicolon_position = strpos($base64_data, ';');
$file_contents = base64_decode(substr($base64_data, $comma_position + 1));
$mimetype = substr($base64_data, 5, $semicolon_position - 5);
$extension = \Drupal::service('file.mime_type.guesser.extension')->convertMimeTypeToExtension($mimetype);
$filename = trim($input['filefield_clipboard']['filename']);
$filename = preg_replace('/\.[a-z0-9]{3,4}$/', '', $filename);
$filename = (empty($filename) ? 'paste_' . REQUEST_TIME : $filename) . '.' . $extension;
$filepath = file_create_filename($filename, $temporary_directory);
$copy_success = FALSE;
if ($fp = @fopen($filepath, 'w')) {
fwrite($fp, $file_contents);
fclose($fp);
$copy_success = TRUE;
}
if ($copy_success && $file = filefield_sources_save_file($filepath, $element['#upload_validators'], $element['#upload_location'])) {
if (!in_array($file->id(), $input['fids'])) {
$input['fids'][] = $file->id();
}
}
// Remove the temporary file generated from paste.
@unlink($filepath);
}
}
/**
* {@inheritdoc}
*/
public static function process(array &$element, FormStateInterface $form_state, array &$complete_form) {
$element['filefield_clipboard'] = array(
'#weight' => 100.5,
'#theme' => 'filefield_sources_element',
'#source_id' => 'clipboard',
// Required for proper theming.
'#filefield_source' => TRUE,
'#filefield_sources_hint_text' => t('Enter filename then paste.'),
'#description' => filefield_sources_element_validation_help($element['#upload_validators']),
);
$element['filefield_clipboard']['capture'] = array(
'#type' => 'item',
'#markup' => 'example_filename.png
' . t('ctrl + v') . '',
'#description' => t('Enter a file name and paste an image from the clipboard. This feature only works in limited browsers.'),
);
$element['filefield_clipboard']['filename'] = array(
'#type' => 'hidden',
'#attributes' => array('class' => array('filefield-source-clipboard-filename')),
);
$element['filefield_clipboard']['contents'] = array(
'#type' => 'hidden',
'#attributes' => array('class' => array('filefield-source-clipboard-contents')),
);
$class = '\Drupal\file\Element\ManagedFile';
$ajax_settings = [
'callback' => [$class, 'uploadAjaxCallback'],
'options' => [
'query' => [
'element_parents' => implode('/', $element['#array_parents']),
],
],
'wrapper' => $element['upload_button']['#ajax']['wrapper'],
'effect' => 'fade',
'progress' => [
'type' => 'throbber',
'message' => t('Transfering file...'),
],
];
$element['filefield_clipboard']['upload'] = [
'#name' => implode('_', $element['#parents']) . '_clipboard_upload_button',
'#type' => 'submit',
'#value' => t('Upload'),
'#attributes' => ['class' => ['js-hide']],
'#validate' => [],
'#submit' => ['filefield_sources_field_submit'],
'#limit_validation_errors' => [$element['#parents']],
'#ajax' => $ajax_settings,
];
return $element;
}
/**
* Theme the output of the clipboard element.
*/
public static function element($variables) {
$element = $variables['element'];
return '' . drupal_render_children($element) . '
';
}
}