DropEventHelper.cpp

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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2018 ISIS Rutherford Appleton Laboratory UKRI,
//   NScD Oak Ridge National Laboratory, European Spallation Source,
//   Institut Laue - Langevin & CSNS, Institute of High Energy Physics, CAS
// SPDX - License - Identifier: GPL - 3.0 +
#include "MantidQtWidgets/Common/DropEventHelper.h"
 
#include <QFileInfo>
#include <QMimeData>
#include <QStringList>
#include <QUrl>
 
// Compile on OSX only.
#if defined(__APPLE__)
#include <CoreFoundation/CoreFoundation.h>
#endif // defined(__APPLE__)
 
using namespace MantidQt::MantidWidgets;
 
QUrl fixupURL(const QUrl &url) {
#if defined(__APPLE__)
  QString localFileQString = url.toLocalFile();
  // Compile on OSX only.
  if (localFileQString.startsWith("/.file/id=")) {
    CFStringRef relCFStringRef =
        CFStringCreateWithCString(kCFAllocatorDefault, localFileQString.toUtf8().constData(), kCFStringEncodingUTF8);
    CFURLRef relCFURL = CFURLCreateWithFileSystemPath(kCFAllocatorDefault, relCFStringRef, kCFURLPOSIXPathStyle,
                                                      false // isDirectory
    );
    CFErrorRef error = nullptr;
    CFURLRef absCFURL = CFURLCreateFilePathURL(kCFAllocatorDefault, relCFURL, &error);
    if (!error) {
      static const CFIndex maxAbsPathCStrBufLen = 4096;
      char absPathCStr[maxAbsPathCStrBufLen];
      if (CFURLGetFileSystemRepresentation(absCFURL,
                                           true, // resolveAgainstBase
                                           reinterpret_cast<UInt8 *>(&absPathCStr[0]), maxAbsPathCStrBufLen)) {
        localFileQString = QString(absPathCStr);
      }
    }
    CFRelease(absCFURL);
    CFRelease(relCFURL);
    CFRelease(relCFStringRef);
  }
  return QUrl(localFileQString);
#else
  return url;
#endif // defined(__APPLE__)
}
 
QStringList DropEventHelper::getFileNames(const QDropEvent *event) {
  QStringList filenames;
  const auto mimeData = event->mimeData();
  if (mimeData->hasUrls()) {
    const auto urlList = mimeData->urls();
    for (const auto &url : urlList) {
      const auto fileUrl = fixupURL(url);
      const auto fName = fileUrl.toLocalFile();
      if (fName.size() > 0) {
        filenames.append(fName);
      }
    }
  }
  return filenames;
}
 
QStringList DropEventHelper::extractPythonFiles(const QDropEvent *event) {
  QStringList filenames;
 
  for (const auto &name : getFileNames(event)) {
    QFileInfo fi(name);
 
    if (fi.suffix().toUpper() == "PY") {
      filenames.append(name);
    }
  }
 
  return filenames;
}