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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <stdio.h>
#include <osl/diagnose.h>
#include <osl/thread.h>
#include <sal/log.hxx>
#include "getfilenamewrapper.hxx"
#if defined _MSC_VER
#pragma warning(push, 1)
#endif
#include <objbase.h>
#include <process.h>
#if defined _MSC_VER
#pragma warning(pop)
#endif
namespace /* private */
{
// This class prevents changing of the working
// directory.
class CurDirGuard
{
bool m_bValid;
wchar_t* m_pBuffer;
DWORD m_nBufLen;
public:
CurDirGuard()
: m_bValid( false )
, m_pBuffer( nullptr )
, m_nBufLen( 0 )
{
m_nBufLen = GetCurrentDirectoryW( 0, nullptr );
if ( m_nBufLen )
{
m_pBuffer = new wchar_t[m_nBufLen];
m_bValid = ( GetCurrentDirectoryW( m_nBufLen, m_pBuffer ) == ( m_nBufLen - 1 ) );
}
}
~CurDirGuard()
{
bool bDirSet = false;
if ( m_pBuffer )
{
if ( m_bValid )
{
if ( m_nBufLen - 1 > MAX_PATH )
{
DWORD nNewLen = m_nBufLen + 8;
wchar_t* pNewBuffer = new wchar_t[nNewLen];
if ( m_nBufLen > 3 && m_pBuffer[0] == (wchar_t)'\\' && m_pBuffer[1] == (wchar_t)'\\' )
{
if ( m_pBuffer[2] == (wchar_t)'?' )
_snwprintf( pNewBuffer, nNewLen, L"%s", m_pBuffer );
else
_snwprintf( pNewBuffer, nNewLen, L"\\\\?\\UNC\\%s", m_pBuffer+2 );
}
else
_snwprintf( pNewBuffer, nNewLen, L"\\\\?\\%s", m_pBuffer );
bDirSet = SetCurrentDirectoryW( pNewBuffer );
delete [] pNewBuffer;
}
else
bDirSet = SetCurrentDirectoryW( m_pBuffer );
}
delete [] m_pBuffer;
m_pBuffer = nullptr;
}
if ( !bDirSet )
{
// the fallback solution
wchar_t pPath[MAX_PATH+1];
if ( GetWindowsDirectoryW( pPath, MAX_PATH+1 ) <= MAX_PATH )
{
SetCurrentDirectoryW( pPath );
}
else
{
// the system path is also too long?!!
}
}
}
};
struct GetFileNameParam
{
GetFileNameParam(bool bOpen, LPOPENFILENAME lpofn) :
m_bOpen(bOpen),
m_lpofn(lpofn),
m_bRet(false),
m_ExtErr(0)
{}
bool m_bOpen;
LPOPENFILENAME m_lpofn;
bool m_bRet;
int m_ExtErr;
};
unsigned __stdcall ThreadProc(void* pParam)
{
osl_setThreadName("fpicker GetOpenFileName");
CurDirGuard aGuard;
GetFileNameParam* lpgfnp =
static_cast<GetFileNameParam*>(pParam);
HRESULT hr = OleInitialize( nullptr );
if (lpgfnp->m_bOpen)
lpgfnp->m_bRet = GetOpenFileName(lpgfnp->m_lpofn);
else
lpgfnp->m_bRet = GetSaveFileName(lpgfnp->m_lpofn);
lpgfnp->m_ExtErr = CommDlgExtendedError();
if ( SUCCEEDED( hr ) )
OleUninitialize();
return 0;
}
// executes GetOpenFileName/GetSaveFileName in
// a separate thread
bool ThreadExecGetFileName(LPOPENFILENAME lpofn, bool bOpen, /*out*/ int& ExtErr)
{
GetFileNameParam gfnp(bOpen,lpofn);
unsigned id;
HANDLE hThread = reinterpret_cast<HANDLE>(
_beginthreadex(nullptr, 0, ThreadProc, &gfnp, 0, &id));
SAL_WARN_IF( !hThread, "fpicker", "could not create STA thread");
WaitForSingleObject(hThread, INFINITE);
CloseHandle(hThread);
ExtErr = gfnp.m_ExtErr;
return gfnp.m_bRet;
}
// This function returns true if the calling
// thread belongs to a Multithreaded Apartment
// (MTA)
bool IsMTA()
{
HRESULT hr = CoInitialize(nullptr);
if (RPC_E_CHANGED_MODE == hr)
return true;
if(SUCCEEDED(hr))
CoUninitialize();
return false;
}
} // namespace private
CGetFileNameWrapper::CGetFileNameWrapper() :
m_ExtendedDialogError(0)
{
}
bool CGetFileNameWrapper::getOpenFileName(LPOPENFILENAME lpofn)
{
OSL_PRECOND(lpofn,"invalid parameter");
bool bRet = false;
if (IsMTA())
{
bRet = ThreadExecGetFileName(
lpofn, true, m_ExtendedDialogError);
}
else
{
CurDirGuard aGuard;
HRESULT hr = OleInitialize( nullptr );
bRet = GetOpenFileName(lpofn);
m_ExtendedDialogError = CommDlgExtendedError();
if ( SUCCEEDED( hr ) )
OleUninitialize();
}
return bRet;
}
bool CGetFileNameWrapper::getSaveFileName(LPOPENFILENAME lpofn)
{
OSL_PRECOND(lpofn,"invalid parameter");
bool bRet = false;
if (IsMTA())
{
bRet = ThreadExecGetFileName(
lpofn, false, m_ExtendedDialogError);
}
else
{
CurDirGuard aGuard;
bRet = GetSaveFileName(lpofn);
m_ExtendedDialogError = CommDlgExtendedError();
}
return bRet;
}
int CGetFileNameWrapper::commDlgExtendedError( )
{
return m_ExtendedDialogError;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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