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/* Copyright (C) 2002-2004 RealVNC Ltd. All Rights Reserved.
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
// -=- CleanDesktop.cxx
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <wininet.h>
#include <shlobj.h>
#include <rfb_win32/CleanDesktop.h>
#include <rfb_win32/CurrentUser.h>
#include <rfb_win32/Registry.h>
#include <rfb/LogWriter.h>
#include <rdr/Exception.h>
using namespace rfb;
using namespace rfb::win32;
static LogWriter vlog("CleanDesktop");
struct ActiveDesktop {
ActiveDesktop() : handle(0) {
// - Contact Active Desktop
HRESULT result = CoCreateInstance(CLSID_ActiveDesktop, NULL, CLSCTX_INPROC_SERVER,
IID_IActiveDesktop, (PVOID*)&handle);
if (result != S_OK)
throw rdr::SystemException("failed to contact Active Desktop", result);
}
~ActiveDesktop() {
if (handle)
handle->Release();
}
bool enable(bool enable_) {
// - Get the current Active Desktop options
COMPONENTSOPT adOptions;
memset(&adOptions, 0, sizeof(adOptions));
adOptions.dwSize = sizeof(adOptions);
HRESULT result = handle->GetDesktopItemOptions(&adOptions, 0);
if (result != S_OK) {
vlog.error("failed to get Active Desktop options: %d", result);
return false;
}
// - If Active Desktop is active, disable it
if ((adOptions.fActiveDesktop==0) != (enable_==0)) {
if (enable_)
vlog.debug("enabling Active Desktop");
else
vlog.debug("disabling Active Desktop");
adOptions.fActiveDesktop = enable_;
result = handle->SetDesktopItemOptions(&adOptions, 0);
if (result != S_OK) {
vlog.error("failed to disable ActiveDesktop: %d", result);
return false;
}
handle->ApplyChanges(AD_APPLY_REFRESH);
return true;
}
return false;
}
IActiveDesktop* handle;
};
DWORD SysParamsInfo(UINT action, UINT param, PVOID ptr, UINT ini) {
DWORD r = ERROR_SUCCESS;
if (!SystemParametersInfo(action, param, ptr, ini)) {
r = GetLastError();
vlog.info("SPI error: %d", r);
}
return r;
}
CleanDesktop::CleanDesktop() : restoreActiveDesktop(false), restoreWallpaper(false), restoreEffects(false) {
CoInitialize(0);
}
CleanDesktop::~CleanDesktop() {
enableEffects();
enablePattern();
enableWallpaper();
CoUninitialize();
}
void CleanDesktop::disableWallpaper() {
try {
ImpersonateCurrentUser icu;
vlog.debug("disable desktop wallpaper/Active Desktop");
// -=- First attempt to remove the wallpaper using Active Desktop
try {
ActiveDesktop ad;
if (ad.enable(false))
restoreActiveDesktop = true;
} catch (rdr::Exception& e) {
vlog.error(e.str());
}
// -=- Switch of normal wallpaper and notify apps
SysParamsInfo(SPI_SETDESKWALLPAPER, 0, "", SPIF_SENDCHANGE);
restoreWallpaper = true;
} catch (rdr::Exception& e) {
vlog.info(e.str());
}
}
void CleanDesktop::enableWallpaper() {
try {
ImpersonateCurrentUser icu;
if (restoreActiveDesktop) {
vlog.debug("restore Active Desktop");
// -=- First attempt to re-enable Active Desktop
try {
ActiveDesktop ad;
ad.enable(true);
restoreActiveDesktop = false;
} catch (rdr::Exception& e) {
vlog.error(e.str());
}
}
if (restoreWallpaper) {
vlog.debug("restore desktop wallpaper");
// -=- Then restore the standard wallpaper if required
SysParamsInfo(SPI_SETDESKWALLPAPER, 0, NULL, SPIF_SENDCHANGE);
restoreWallpaper = false;
}
} catch (rdr::Exception& e) {
vlog.info(e.str());
}
}
void CleanDesktop::disablePattern() {
try {
ImpersonateCurrentUser icu;
vlog.debug("disable desktop pattern");
SysParamsInfo(SPI_SETDESKPATTERN, 0, "", SPIF_SENDCHANGE);
restorePattern = true;
} catch (rdr::Exception& e) {
vlog.info(e.str());
}
}
void CleanDesktop::enablePattern() {
try {
if (restorePattern) {
ImpersonateCurrentUser icu;
vlog.debug("restoring pattern...");
TCharArray pattern;
if (osVersion.isPlatformWindows) {
RegKey cfgKey;
cfgKey.openKey(HKEY_CURRENT_USER, _T("Control Panel\\Desktop"));
pattern.buf = cfgKey.getString(_T("Pattern"));
}
SysParamsInfo(SPI_SETDESKPATTERN, 0, pattern.buf, SPIF_SENDCHANGE);
restorePattern = false;
}
} catch (rdr::Exception& e) {
vlog.info(e.str());
}
}
void CleanDesktop::disableEffects() {
#if (WINVER >= 0x500)
try {
ImpersonateCurrentUser icu;
vlog.debug("disable desktop effects");
SysParamsInfo(SPI_SETFONTSMOOTHING, FALSE, 0, SPIF_SENDCHANGE);
if (SysParamsInfo(SPI_GETUIEFFECTS, 0, &uiEffects, 0) == ERROR_CALL_NOT_IMPLEMENTED) {
SysParamsInfo(SPI_GETCOMBOBOXANIMATION, 0, &comboBoxAnim, 0);
SysParamsInfo(SPI_GETGRADIENTCAPTIONS, 0, &gradientCaptions, 0);
SysParamsInfo(SPI_GETHOTTRACKING, 0, &hotTracking, 0);
SysParamsInfo(SPI_GETLISTBOXSMOOTHSCROLLING, 0, &listBoxSmoothScroll, 0);
SysParamsInfo(SPI_GETMENUANIMATION, 0, &menuAnim, 0);
SysParamsInfo(SPI_SETCOMBOBOXANIMATION, 0, FALSE, SPIF_SENDCHANGE);
SysParamsInfo(SPI_SETGRADIENTCAPTIONS, 0, FALSE, SPIF_SENDCHANGE);
SysParamsInfo(SPI_SETHOTTRACKING, 0, FALSE, SPIF_SENDCHANGE);
SysParamsInfo(SPI_SETLISTBOXSMOOTHSCROLLING, 0, FALSE, SPIF_SENDCHANGE);
SysParamsInfo(SPI_SETMENUANIMATION, 0, FALSE, SPIF_SENDCHANGE);
} else {
SysParamsInfo(SPI_SETUIEFFECTS, 0, FALSE, SPIF_SENDCHANGE);
}
restoreEffects = true;
} catch (rdr::Exception& e) {
vlog.info(e.str());
}
#else
vlog.info("disableffects not implemented");
#endif
}
void CleanDesktop::enableEffects() {
try {
if (restoreEffects) {
#if (WINVER >= 0x500)
ImpersonateCurrentUser icu;
vlog.debug("restore desktop effects");
RegKey desktopCfg;
desktopCfg.openKey(HKEY_CURRENT_USER, _T("Control Panel\\Desktop"));
SysParamsInfo(SPI_SETFONTSMOOTHING, desktopCfg.getInt(_T("FontSmoothing"), 0) != 0, 0, SPIF_SENDCHANGE);
if (SysParamsInfo(SPI_SETUIEFFECTS, 0, (void*)uiEffects, SPIF_SENDCHANGE) == ERROR_CALL_NOT_IMPLEMENTED) {
SysParamsInfo(SPI_SETCOMBOBOXANIMATION, 0, (void*)comboBoxAnim, SPIF_SENDCHANGE);
SysParamsInfo(SPI_SETGRADIENTCAPTIONS, 0, (void*)gradientCaptions, SPIF_SENDCHANGE);
SysParamsInfo(SPI_SETHOTTRACKING, 0, (void*)hotTracking, SPIF_SENDCHANGE);
SysParamsInfo(SPI_SETLISTBOXSMOOTHSCROLLING, 0, (void*)listBoxSmoothScroll, SPIF_SENDCHANGE);
SysParamsInfo(SPI_SETMENUANIMATION, 0, (void*)menuAnim, SPIF_SENDCHANGE);
}
restoreEffects = false;
#else
vlog.info("enableEffects not implemented");
#endif
}
} catch (rdr::Exception& e) {
vlog.info(e.str());
}
}
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