mirror of
https://github.com/kasmtech/KasmVNC.git
synced 2024-12-13 18:30:40 +01:00
272 lines
8.7 KiB
C++
272 lines
8.7 KiB
C++
|
/* 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
|
||
|
|
||
|
#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());
|
||
|
}
|
||
|
}
|