t('Paste from clipboard (limited browser support)'),
'label' => t('Clipboard'),
'description' => t('Allow users to paste a file directly from the clipboard.'),
'process' => 'filefield_source_clipboard_process',
'value' => 'filefield_source_clipboard_value',
'weight' => 1,
'file' => 'sources/clipboard.inc',
);
return $source;
}
/**
* Implements hook_menu().
*/
function filefield_source_clipboard_menu() {
$items = array();
$items['file/clipboard/%/%/%'] = array(
'page callback' => 'filefield_source_clipboard_page',
'page arguments' => array(2, 3, 4),
'access callback' => '_filefield_sources_field_access',
'access arguments' => array(2, 3, 4),
'file' => 'sources/clipboard.inc',
'type' => MENU_CALLBACK,
);
return $items;
}
/**
* Implements hook_theme().
*/
function filefield_source_clipboard_theme() {
return array(
'filefield_source_clipboard_element' => array(
'render element' => 'element',
'file' => 'sources/clipboard.inc',
),
);
}
/**
* A #process callback to extend the filefield_widget element type.
*/
function filefield_source_clipboard_process($element, &$form_state, $form) {
// If settings are needed later:
//$instance = field_widget_instance($element, $form_state);
//$settings = $instance['widget']['settings']['filefield_sources']['source_clipboard'];
$element['filefield_clipboard'] = array(
'#weight' => 100.5,
'#theme' => 'filefield_source_clipboard_element',
'#filefield_source' => TRUE, // Required for proper theming.
'#filefield_sources_hint_text' => t('Enter filename then paste.'),
'#description' => filefield_sources_element_validation_help($element['#upload_validators']),
);
$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')),
);
$element['filefield_clipboard']['upload'] = array(
'#type' => 'submit',
'#value' => t('Upload'),
'#ajax' => array(
'path' => 'file/ajax/' . implode('/', $element['#array_parents']) . '/' . $form['form_build_id']['#value'],
'wrapper' => $element['upload_button']['#ajax']['wrapper'],
'effect' => 'fade',
'progress' => array(
'type' => 'throbber',
'message' => t('Transfering file...'),
),
),
'#validate' => array(),
'#submit' => array('filefield_sources_field_submit'),
'#limit_validation_errors' => array($element['#parents']),
'#attributes' => array('style' => 'display: none;'),
);
return $element;
}
/**
* A #filefield_value_callback function.
*/
function filefield_source_clipboard_value(&$element, &$item) {
if (isset($item['filefield_clipboard']['contents']) && strlen($item['filefield_clipboard']['contents']) > 0) {
// Check that the destination is writable.
$temporary_directory = 'temporary://';
if (!file_prepare_directory($temporary_directory, FILE_MODIFY_PERMISSIONS)) {
watchdog('file', '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'];
$mode = variable_get('file_chmod_directory', 0775);
// This first chmod check is for other systems such as S3, which don't work
// with file_prepare_directory().
if (!drupal_chmod($directory, $mode) && !file_prepare_directory($directory, FILE_CREATE_DIRECTORY)) {
watchdog('file', '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 = $item['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);
include_once('./includes/file.mimetypes.inc');
$mime_mapping = file_mimetype_mapping();
$mime_key = array_search($mimetype, $mime_mapping['mimetypes']);
$extension = array_search($mime_key, $mime_mapping['extensions']);
$filename = trim($item['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'])) {
$item = array_merge($item, (array) $file);
}
// Remove the temporary file generated from paste.
@unlink($filepath);
}
}
/**
* Handles the uploading of a file through a POST request.
*/
function filefield_source_clipboard_page($entity_type, $bundle_name, $field_name) {
global $conf;
// Check access.
if (!$instance = field_info_instance($entity_type, $field_name, $bundle_name)) {
return drupal_access_denied();
}
$field = field_info_field($field_name);
module_load_include('inc', 'imce', 'inc/imce.page');
return imce($field['settings']['uri_scheme']);
}
/**
* Theme the output of the clipboard field.
*/
function theme_filefield_source_clipboard_element($variables) {
$element = $variables['element'];
$capture = 'example_filename.png
';
$element['#field_suffix'] = drupal_render($element['upload']) . ' ' . t('ctrl + v') . '';
$element['#description'] = t('Enter a file name and paste an image from the clipboard. This feature only works in limited browsers.');
$element['#children'] = $capture . drupal_render_children($element);
return '' . theme('form_element', array('element' => $element)) . '
';
}