/**
* Delete file
*
* @param string $file
* @return \Magento\Theme\Model\Wysiwyg\Storage
*/
public function deleteFile($file)
{
$file = $this->_helper->urlDecode($file);
$path = $this->mediaWriteDirectory->getRelativePath($this->_helper->getCurrentPath());
$filePath = $this->mediaWriteDirectory->getRelativePath($path . '/' . $file);
$thumbnailPath = $this->_helper->getThumbnailDirectory($filePath) . '/' . $file;
if (0 === strpos($filePath, $path) && 0 === strpos($filePath, $this->_helper->getStorageRoot())) {
$this->mediaWriteDirectory->delete($filePath);
$this->mediaWriteDirectory->delete($thumbnailPath);
}
return $this;
}