Fixed screensaver detection on XP.

lib/arch/CArchMiscWindows.cpp

@@ -62,6 +62,31 @@ CArchMiscWindows::isWindows95Family()
 	return result;
 }
 
+bool
+CArchMiscWindows::isWindowsModern()
+{
+	static bool init   = false;
+	static bool result = false;
+
+	if (!init) {
+		OSVERSIONINFO version;
+		version.dwOSVersionInfoSize = sizeof(version);
+		if (GetVersionEx(&version) == 0) {
+			// cannot determine OS;  assume not modern
+			result = false;
+		}
+		else {
+			result = ((version.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS &&
+						version.dwMajorVersion == 4 &&
+						version.dwMinorVersion > 0) ||
+						(version.dwPlatformId == VER_PLATFORM_WIN32_NT &&
+						version.dwMajorVersion > 4));
+		}
+		init = true;
+	}
+	return result;
+}
+
 int
 CArchMiscWindows::runDaemon(RunFunc runFunc)
 {

lib/arch/CArchMiscWindows.h

@@ -49,6 +49,13 @@ public:
 	*/
 	static bool			isWindows95Family();
 
+	//! Test if windows 95, et al.
+	/*!
+	Returns true iff the platform is win98 or win2k or higher (i.e.
+	not windows 95 or windows NT).
+	*/
+	static bool			isWindowsModern();
+
 	//! Run the daemon
 	/*!
 	Delegates to CArchDaemonWindows.

lib/platform/CMSWindowsDesks.cpp

@@ -33,6 +33,9 @@
 #if !defined(SPI_SETMOUSESPEED)
 #define SPI_SETMOUSESPEED 113
 #endif
+#if !defined(SPI_GETSCREENSAVERRUNNING)
+#define SPI_GETSCREENSAVERRUNNING 114
+#endif
 
 // X button stuff
 #if !defined(WM_XBUTTONDOWN)
@@ -84,6 +87,7 @@ CMSWindowsDesks::CMSWindowsDesks(
 				const IScreenSaver* screensaver, IJob* updateKeys) :
 	m_isPrimary(isPrimary),
 	m_is95Family(CArchMiscWindows::isWindows95Family()),
+	m_isModernFamily(CArchMiscWindows::isWindowsModern()),
 	m_isOnScreen(m_isPrimary),
 	m_x(0), m_y(0),
 	m_w(0), m_h(0),
@@ -622,8 +626,22 @@ CMSWindowsDesks::deskLeave(CDesk* desk, HKL keyLayout)
 					strcmp(className, "ConsoleWindowClass") == 0) {
 					EnableWindow(desk->m_window, TRUE);
 					SetActiveWindow(desk->m_window);
+
+					// force our window to the foreground.  we can't
+					// simply call SetForegroundWindow() because that
+					// will only alert the user that the window wants
+					// to be the foreground as of windows 98/2000.  we
+					// have to attach to the thread of the current
+					// foreground window then call it on our window
+					// and finally detach the threads.
+					DWORD thisThread =
+						GetWindowThreadProcessId(desk->m_window, NULL);
+					DWORD thatThread =
+						GetWindowThreadProcessId(foreground, NULL);
+					AttachThreadInput(thatThread, thisThread, TRUE);
+					SetForegroundWindow(desk->m_window);
+					AttachThreadInput(thatThread, thisThread, FALSE);
 				}
-				LOG((CLOG_DEBUG1 "active window class: %s", className));
 			}
 		}
 
@@ -901,6 +919,14 @@ void
 CMSWindowsDesks::handleCheckDesk(const CEvent&, void*)
 {
 	checkDesk();
+
+	// also check if screen saver is running if on a modern OS and
+	// this is the primary screen.
+	if (m_isPrimary && m_isModernFamily) {
+		BOOL running;
+		SystemParametersInfo(SPI_GETSCREENSAVERRUNNING, 0, &running, FALSE);
+		PostThreadMessage(m_threadID, SYNERGY_MSG_SCREEN_SAVER, running, 0);
+	}
 }
 
 HDESK

lib/platform/CMSWindowsDesks.h

@@ -214,6 +214,9 @@ private:
 	// true if windows 95/98/me
 	bool				m_is95Family;
 
+	// true if windows 98/2k or higher (i.e. not 95/nt)
+	bool				m_isModernFamily;
+
 	// true if mouse has entered the screen
 	bool				m_isOnScreen;
 

lib/platform/CMSWindowsScreen.cpp

@@ -94,6 +94,7 @@ CMSWindowsScreen::CMSWindowsScreen(bool isPrimary,
 	m_fixTimer(NULL),
 	m_screensaver(NULL),
 	m_screensaverNotify(false),
+	m_screensaverActive(false),
 	m_window(NULL),
 	m_nextClipboardWindow(NULL),
 	m_ownClipboard(false),
@@ -1133,7 +1134,9 @@ CMSWindowsScreen::onScreensaver(bool activated)
 	}
 
 	if (activated) {
-		if (m_screensaver->checkStarted(SYNERGY_MSG_SCREEN_SAVER, FALSE, 0)) {
+		if (!m_screensaverActive &&
+			m_screensaver->checkStarted(SYNERGY_MSG_SCREEN_SAVER, FALSE, 0)) {
+			m_screensaverActive = true;
 			sendEvent(getScreensaverActivatedEvent());
 
 			// enable display power down
@@ -1141,11 +1144,14 @@ CMSWindowsScreen::onScreensaver(bool activated)
 		}
 	}
 	else {
+		if (m_screensaverActive) {
+			m_screensaverActive = false;
 			sendEvent(getScreensaverDeactivatedEvent());
 
 			// disable display power down
 			CArchMiscWindows::addBusyState(CArchMiscWindows::kDISPLAY);
 		}
+	}
 
 	return true;
 }

lib/platform/CMSWindowsScreen.h

@@ -238,6 +238,7 @@ private:
 	// screen saver stuff
 	CMSWindowsScreenSaver*	m_screensaver;
 	bool					m_screensaverNotify;
+	bool					m_screensaverActive;
 
 	// clipboard stuff.  our window is used mainly as a clipboard
 	// owner and as a link in the clipboard viewer chain.