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- /* Copyright (C) 2002-2005 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
-
- #ifdef HAVE_CONFIG_H
- #include <config.h>
- #endif
-
- #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>
- #include <os/os.h>
- #include <set>
-
- 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();
- }
-
- // enableItem
- // enables or disables the Nth Active Desktop item
- bool enableItem(int i, bool enable_) {
- COMPONENT item;
- memset(&item, 0, sizeof(item));
- item.dwSize = sizeof(item);
-
- HRESULT hr = handle->GetDesktopItem(i, &item, 0);
- if (hr != S_OK) {
- vlog.error("unable to GetDesktopItem %d: %ld", i, hr);
- return false;
- }
- item.fChecked = enable_;
- vlog.debug("%sbling %d: \"%s\"", enable_ ? "ena" : "disa", i, (const char*)CStr(item.wszFriendlyName));
-
- hr = handle->ModifyDesktopItem(&item, COMP_ELEM_CHECKED);
- return hr == S_OK;
- }
-
- // enable
- // Attempts to enable/disable Active Desktop, returns true if the setting changed,
- // false otherwise.
- // If Active Desktop *can* be enabled/disabled then that is done.
- // If Active Desktop is always on (XP/2K3) then instead the individual items are
- // disabled, and true is returned to indicate that they need to be restored later.
- bool enable(bool enable_) {
- bool modifyComponents = false;
-
- vlog.debug("ActiveDesktop::enable");
-
- // - Firstly, try to disable Active Desktop entirely
- HRESULT hr;
- COMPONENTSOPT adOptions;
- memset(&adOptions, 0, sizeof(adOptions));
- adOptions.dwSize = sizeof(adOptions);
-
- // Attempt to actually disable/enable AD
- hr = handle->GetDesktopItemOptions(&adOptions, 0);
- if (hr == S_OK) {
- // If Active Desktop is already in the desired state then return false (no change)
- // NB: If AD is enabled AND restoreItems is set then we regard it as disabled...
- if (((adOptions.fActiveDesktop==0) && restoreItems.empty()) == (enable_==false))
- return false;
- adOptions.fActiveDesktop = enable_;
- hr = handle->SetDesktopItemOptions(&adOptions, 0);
- }
- // Apply the change, then test whether it actually took effect
- if (hr == S_OK)
- hr = handle->ApplyChanges(AD_APPLY_REFRESH);
- if (hr == S_OK)
- hr = handle->GetDesktopItemOptions(&adOptions, 0);
- if (hr == S_OK)
- modifyComponents = (adOptions.fActiveDesktop==0) != (enable_==false);
- if (hr != S_OK) {
- vlog.error("failed to get/set Active Desktop options: %ld", hr);
- return false;
- }
-
- if (enable_) {
- // - We are re-enabling Active Desktop. If there are components in restoreItems
- // then restore them!
- std::set<int>::const_iterator i;
- for (i=restoreItems.begin(); i!=restoreItems.end(); i++) {
- enableItem(*i, true);
- }
- restoreItems.clear();
- } else if (modifyComponents) {
- // - Disable all currently enabled items, and add the disabled ones to restoreItems
- int itemCount = 0;
- hr = handle->GetDesktopItemCount(&itemCount, 0);
- if (hr != S_OK) {
- vlog.error("failed to get desktop item count: %ld", hr);
- return false;
- }
- for (int i=0; i<itemCount; i++) {
- if (enableItem(i, false))
- restoreItems.insert(i);
- }
- }
-
- // - Apply whatever changes we have made, but DON'T save them!
- hr = handle->ApplyChanges(AD_APPLY_REFRESH);
- return hr == S_OK;
- }
- IActiveDesktop* handle;
- std::set<int> restoreItems;
- };
-
-
- 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: %lu", r);
- }
- return r;
- }
-
-
- CleanDesktop::CleanDesktop() : restoreActiveDesktop(false),
- restoreWallpaper(false),
- restoreEffects(false) {
- CoInitialize(0);
- }
-
- CleanDesktop::~CleanDesktop() {
- enableEffects();
- 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("%s", e.str());
- }
-
- // -=- Switch of normal wallpaper and notify apps
- SysParamsInfo(SPI_SETDESKWALLPAPER, 0, (PVOID) "", SPIF_SENDCHANGE);
- restoreWallpaper = true;
-
- } catch (rdr::Exception& e) {
- vlog.info("%s", 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("%s", 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("%s", e.str());
- }
- }
-
-
- void CleanDesktop::disableEffects() {
- 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);
-
- // We *always* restore UI effects overall, since there is no Windows GUI to do it
- uiEffects = TRUE;
- }
- restoreEffects = true;
-
- } catch (rdr::Exception& e) {
- vlog.info("%s", e.str());
- }
- }
-
- void CleanDesktop::enableEffects() {
- try {
- if (restoreEffects) {
- 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*)(intptr_t)uiEffects, SPIF_SENDCHANGE) == ERROR_CALL_NOT_IMPLEMENTED) {
- SysParamsInfo(SPI_SETCOMBOBOXANIMATION, 0, (void*)(intptr_t)comboBoxAnim, SPIF_SENDCHANGE);
- SysParamsInfo(SPI_SETGRADIENTCAPTIONS, 0, (void*)(intptr_t)gradientCaptions, SPIF_SENDCHANGE);
- SysParamsInfo(SPI_SETHOTTRACKING, 0, (void*)(intptr_t)hotTracking, SPIF_SENDCHANGE);
- SysParamsInfo(SPI_SETLISTBOXSMOOTHSCROLLING, 0, (void*)(intptr_t)listBoxSmoothScroll, SPIF_SENDCHANGE);
- SysParamsInfo(SPI_SETMENUANIMATION, 0, (void*)(intptr_t)menuAnim, SPIF_SENDCHANGE);
- }
- restoreEffects = false;
- }
-
- } catch (rdr::Exception& e) {
- vlog.info("%s", e.str());
- }
- }
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