/* -*- 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 .
 */

#define UNICODE

#ifdef _MSC_VER
#pragma warning(push,1) // disable warnings within system headers
#endif
#include <windows.h>
#include <msiquery.h>
#ifdef _MSC_VER
#pragma warning(pop)
#endif

#include <string.h>
#include <malloc.h>
#include <stdio.h>


BOOL UnicodeEquals( wchar_t* pStr1, wchar_t* pStr2 )
{
    if ( pStr1 == NULL && pStr2 == NULL )
        return TRUE;
    else if ( pStr1 == NULL || pStr2 == NULL )
        return FALSE;

    while( *pStr1 == *pStr2 && *pStr1 && *pStr2 )
        pStr1++, pStr2++;

    return ( *pStr1 == 0 && *pStr2 == 0 );
}


BOOL GetMsiProp( MSIHANDLE hMSI, const wchar_t* pPropName, wchar_t** ppValue )
{
    DWORD sz = 0;
       if ( MsiGetProperty( hMSI, pPropName, L"", &sz ) == ERROR_MORE_DATA )
       {
           sz++;
           DWORD nbytes = sz * sizeof( wchar_t );
           wchar_t* buff = reinterpret_cast<wchar_t*>( malloc( nbytes ) );
           ZeroMemory( buff, nbytes );
           MsiGetProperty( hMSI, pPropName, buff, &sz );
           *ppValue = buff;

        return TRUE;
    }

    return FALSE;
}


BOOL MakeInstallForAllUsers( MSIHANDLE hMSI )
{
    BOOL bResult = FALSE;
    wchar_t* pVal = NULL;
    if ( GetMsiProp( hMSI, L"ALLUSERS", &pVal ) && pVal )
    {
        bResult = UnicodeEquals( pVal , L"1" );
        free( pVal );
    }

    return bResult;
}


extern "C" UINT __stdcall PatchActiveXControl( MSIHANDLE hMSI )
{
    // MessageBox(NULL, L"PatchActiveXControl", L"Information", MB_OK | MB_ICONINFORMATION);

    INSTALLSTATE current_state;
    INSTALLSTATE future_state;

    if ( ERROR_SUCCESS == MsiGetFeatureState( hMSI, L"gm_o_Activexcontrol", &current_state, &future_state ) )
    {
        BOOL bInstallForAllUsers = MakeInstallForAllUsers( hMSI );

        if ( future_state == INSTALLSTATE_LOCAL
          || ( current_state == INSTALLSTATE_LOCAL && future_state == INSTALLSTATE_UNKNOWN ) )
        {
            HKEY hkey = NULL;
            char* aSubKey = "Software\\Classes\\MIME\\DataBase\\Content Type\\application/vnd.sun.xml.base";
               if ( ERROR_SUCCESS == RegCreateKeyA(bInstallForAllUsers ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER, aSubKey, &hkey) )
            {
                   RegDeleteValueA( hkey, "CLSID" );
                RegCloseKey( hkey ), hkey = NULL;
            }
        }
    }
    else
    {
        // assert( FALSE );
    }

    return ERROR_SUCCESS;
}


/* vim:set shiftwidth=4 softtabstop=4 expandtab: */