xref: /trunk/main/setup_native/source/win32/customactions/shellextensions/iconcache.cxx (revision cf6516809c57e1bb0a940545cca99cdad54d4ce2)

/**************************************************************
 *
 * 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
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
 *************************************************************/



#ifdef _MSC_VER
#pragma warning(push, 1) /* disable warnings within system headers */
#endif
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <msiquery.h>
#ifdef _MSC_VER
#pragma warning(pop)
#endif

#include <stdlib.h>

extern "C" UINT __stdcall RebuildShellIconCache(MSIHANDLE)
{
    // Rebuild icon cache on windows OS prior XP

    OSVERSIONINFO   osverinfo;

    osverinfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);

    if (
        GetVersionEx( &osverinfo ) &&
        VER_PLATFORM_WIN32_NT == osverinfo.dwPlatformId &&
        (
        5 < osverinfo.dwMajorVersion ||
        5 == osverinfo.dwMajorVersion && 0 < osverinfo.dwMinorVersion
        )
        )
    {
        return ERROR_SUCCESS;
    }

    HKEY    hKey;
    DWORD   dwDisposition;
    LONG    lError = RegCreateKeyEx( HKEY_CURRENT_USER, TEXT("Control Panel\\Desktop\\WindowMetrics"), 0, NULL, REG_OPTION_VOLATILE, KEY_SET_VALUE | KEY_QUERY_VALUE, NULL, &hKey, &dwDisposition );

    if ( ERROR_SUCCESS == lError )
    {
        TCHAR   szValue[256];
        TCHAR   szTempValue[256];
        DWORD   cbValue = sizeof(szValue);
        DWORD   dwType;
        int     iSize = 0;

        lError = RegQueryValueEx( hKey, TEXT("Shell Icon Size"), 0, &dwType, (LPBYTE)szValue, &cbValue );

        if ( ERROR_SUCCESS == lError )
            iSize = atoi( szValue );

        if ( !iSize )
        {
            iSize = GetSystemMetrics( SM_CXICON );
            itoa( iSize, szValue, 10 );
            cbValue = strlen( szValue ) + 1;
            dwType = REG_SZ;
        }

        itoa( iSize + 1, szTempValue, 10 );
        lError = RegSetValueEx( hKey, TEXT("Shell Icon Size"), 0, dwType, (LPBYTE)szTempValue, strlen( szTempValue ) + 1 );

        LRESULT lResult = SendMessageTimeout(
             HWND_BROADCAST,
             WM_SETTINGCHANGE,
             SPI_SETNONCLIENTMETRICS,
             (LPARAM)TEXT("WindowMetrics"),
             SMTO_NORMAL|SMTO_ABORTIFHUNG,
             0, NULL);

        lError = RegSetValueEx( hKey, TEXT("Shell Icon Size"), 0, dwType, (LPBYTE)szValue, cbValue );

        lResult = SendMessageTimeout(
             HWND_BROADCAST,
             WM_SETTINGCHANGE,
             SPI_SETNONCLIENTMETRICS,
             (LPARAM)TEXT("WindowMetrics"),
             SMTO_NORMAL|SMTO_ABORTIFHUNG,
             0, NULL);

        lError = RegCloseKey( hKey );
    }

    return ERROR_SUCCESS;
}