File: vtkPVFileInformationHelper.cxx

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/*=========================================================================

  Program:   ParaView
  Module:    vtkPVFileInformationHelper.cxx

  Copyright (c) Kitware, Inc.
  All rights reserved.
  See Copyright.txt or http://www.paraview.org/HTML/Copyright.html for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
#include "vtkPVFileInformationHelper.h"

#include "vtkObjectFactory.h"

#if defined(_WIN32)
#include <wchar.h>
#include <windows.h>
#endif

#include <vtksys/SystemTools.hxx>

vtkStandardNewMacro(vtkPVFileInformationHelper);
//-----------------------------------------------------------------------------
vtkPVFileInformationHelper::vtkPVFileInformationHelper()
{
  this->DirectoryListing = 0;
  this->Path = 0;
  this->WorkingDirectory = 0;
  this->SpecialDirectories = 0;
  this->SetPath(".");
  this->PathSeparator = 0;
  this->FastFileTypeDetection = 1;
#if defined(_WIN32) && !defined(__CYGWIN__)
  this->SetPathSeparator("\\");
#else
  this->SetPathSeparator("/");
#endif
}

//-----------------------------------------------------------------------------
vtkPVFileInformationHelper::~vtkPVFileInformationHelper()
{
  this->SetPath(0);
  this->SetPathSeparator(0);
  this->SetWorkingDirectory(0);
}

//-----------------------------------------------------------------------------
bool vtkPVFileInformationHelper::GetActiveFileIsReadable()
{
  return vtksys::SystemTools::FileExists(vtkPVFileInformationHelper::Utf8ToLocalWin32(this->Path));
}

//-----------------------------------------------------------------------------
bool vtkPVFileInformationHelper::GetActiveFileIsDirectory()
{
  return vtksys::SystemTools::FileIsDirectory(
    vtkPVFileInformationHelper::Utf8ToLocalWin32(this->Path));
}

//-----------------------------------------------------------------------------
void vtkPVFileInformationHelper::PrintSelf(ostream& os, vtkIndent indent)
{
  this->Superclass::PrintSelf(os, indent);
  os << indent << "Path: " << (this->Path ? this->Path : "(null)") << endl;
  os << indent
     << "WorkingDirectory: " << (this->WorkingDirectory ? this->WorkingDirectory : "(null)")
     << endl;
  os << indent << "DirectoryListing: " << this->DirectoryListing << endl;
  os << indent << "SpecialDirectories: " << this->SpecialDirectories << endl;
  os << indent << "PathSeparator: " << (this->PathSeparator ? this->PathSeparator : "(null)")
     << endl;
  os << indent << "FastFileTypeDetection: " << this->FastFileTypeDetection << endl;
}

//-----------------------------------------------------------------------------
std::string vtkPVFileInformationHelper::Utf8ToLocalWin32(const std::string& path)
{
#if defined(_WIN32)
  int wlen = static_cast<int>(path.length()) * 2 + 1;
  WCHAR* wpath = new WCHAR[wlen];
  char* lpath = new char[wlen];
  MultiByteToWideChar(CP_UTF8, 0, path.c_str(), -1, wpath, wlen);
  WideCharToMultiByte(CP_ACP, 0, wpath, -1, lpath, wlen, NULL, NULL);
  std::string localPath(lpath);
  delete wpath;
  delete lpath;
  return localPath;
#else
  return path;
#endif
}

// Transform local code page string to UTF8 string
//-----------------------------------------------------------------------------
std::string vtkPVFileInformationHelper::LocalToUtf8Win32(const std::string& path)
{
#if defined(_WIN32)
  int wlen = static_cast<int>(path.length()) * 2 + 1;
  WCHAR* wpath = new WCHAR[wlen];
  char* lpath = new char[wlen];
  // We may want a stronger implementation ,
  // see vtksys::Encoding way of recovering converted string size
  // TODO
  int err = MultiByteToWideChar(CP_ACP, 0, path.c_str(), -1, wpath, wlen);
  err = WideCharToMultiByte(CP_UTF8, 0, wpath, -1, lpath, wlen, NULL, NULL);
  std::string utfPath(lpath);
  delete wpath;
  delete lpath;
  return utfPath;
#else
  return path;
#endif
}