Changeset 2752 for trunk/synergy/lib/platform/CPMScreenSaver.cpp

Timestamp:

Jul 29, 2006, 6:43:07 AM (19 years ago)

Author:

bird

Message:

Two classes (CPMScreen and CPMKeyState) + the hook dll left (and debugging of course).

File:

• trunk/synergy/lib/platform/CPMScreenSaver.cpp (copied) (copied from trunk/synergy/lib/platform/CMSWindowsScreenSaver.cpp ) (2 diffs)

trunk/synergy/lib/platform/CPMScreenSaver.cpp

@@ -2 +2 @@
  * synergy -- mouse and keyboard sharing utility
  * Copyright (C) 2002 Chris Schoeneman
+ * Copyright (C) 2006 Knut St. Osmundsen
  * 
  * This package is free software; you can redistribute it and/or
@@ -13 +14 @@
  */
 
-#include "CMSWindowsScreenSaver.h"
-#include "CMSWindowsScreen.h"
-#include "CThread.h"
-#include "CLog.h"
-#include "TMethodJob.h"
-#include "CArch.h"
-#include "CArchMiscWindows.h"
-#include <malloc.h>
-#include <tchar.h>
-
-#if !defined(SPI_GETSCREENSAVERRUNNING)
-#define SPI_GETSCREENSAVERRUNNING 114
-#endif
-
-static const TCHAR* g_isSecureNT = "ScreenSaverIsSecure";
-static const TCHAR* g_isSecure9x = "ScreenSaveUsePassword";
-static const TCHAR* const g_pathScreenSaverIsSecure[] = {
-        "Control Panel",
-        "Desktop",
-        NULL
-};
+#include "CPMScreenSaver.h"
 
 //
-// CMSWindowsScreenSaver
+// CPMScreenSaver
 //
 
-CMSWindowsScreenSaver::CMSWindowsScreenSaver() :
-        m_wasSecure(false),
-        m_wasSecureAnInt(false),
-        m_process(NULL),
-        m_watch(NULL),
-        m_threadID(0),
-        m_active(false)
+CPMScreenSaver::CPMScreenSaver()
 {
-        // detect OS
-        m_is95Family = false;
-        m_is95       = false;
-        m_isNT       = false;
-        OSVERSIONINFO info;
-        info.dwOSVersionInfoSize = sizeof(info);
-        if (GetVersionEx(&info)) {
-                m_is95Family = (info.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS);
-                if (info.dwPlatformId   == VER_PLATFORM_WIN32_NT &&
-                        info.dwMajorVersion <= 4) {
-                        m_isNT = true;
-                }
-                else if (info.dwPlatformId  == VER_PLATFORM_WIN32_WINDOWS &&
-                                info.dwMajorVersion == 4 &&
-                                info.dwMinorVersion == 0) {
-                        m_is95 = true;
-                }
-        }
-
-        // check if screen saver is enabled
-        SystemParametersInfo(SPI_GETSCREENSAVEACTIVE, 0, &m_wasEnabled, 0);
 }
 
-CMSWindowsScreenSaver::~CMSWindowsScreenSaver()
+CPMScreenSaver::~CPMScreenSaver()
 {
-        unwatchProcess();
+}
+
+void
+CPMScreenSaver::enable()
+{
+}
+
+void
+CPMScreenSaver::disable()
+{
+}
+
+void
+CPMScreenSaver::activate()
+{
+}
+
+void
+CPMScreenSaver::deactivate()
+{
 }
 
 bool
-CMSWindowsScreenSaver::checkStarted(UINT msg, WPARAM wParam, LPARAM lParam)
+CPMScreenSaver::isActive() const
 {
-        // if already started then say it didn't just start
-        if (m_active) {
-                return false;
-        }
-
-        // screen saver may have started.  look for it and get
-        // the process.  if we can't find it then assume it
-        // didn't really start.  we wait a moment before
-        // looking to give the screen saver a chance to start.
-        // this shouldn't be a problem since we only get here
-        // if the screen saver wants to kick in, meaning that
-        // the system is idle or the user deliberately started
-        // the screen saver.
-        Sleep(250);
-
-        // set parameters common to all screen saver handling
-        m_threadID = GetCurrentThreadId();
-        m_msg      = msg;
-        m_wParam   = wParam;
-        m_lParam   = lParam;
-
-        // we handle the screen saver differently for the windows
-        // 95 and nt families.
-        if (m_is95Family) {
-                // on windows 95 we wait for the screen saver process
-                // to terminate.  get the process.
-                DWORD processID = findScreenSaver();
-                HANDLE process = OpenProcess(SYNCHRONIZE, FALSE, processID);
-                if (process == NULL) {
-                        // didn't start
-                        LOG((CLOG_DEBUG2 "can't open screen saver process"));
-                        return false;
-                }
-
-                // watch for the process to exit
-                watchProcess(process);
-        }
-        else {
-                // on the windows nt family we wait for the desktop to
-                // change until it's neither the Screen-Saver desktop
-                // nor a desktop we can't open (the login desktop).
-                // since windows will send the request-to-start-screen-
-                // saver message even when the screen saver is disabled
-                // we first check that the screen saver is indeed active
-                // before watching for it to stop.
-                if (!isActive()) {
-                        LOG((CLOG_DEBUG2 "can't open screen saver desktop"));
-                        return false;
-                }
-
-                watchDesktop();
-        }
-
-        return true;
+    return false;
 }
 
-void
-CMSWindowsScreenSaver::enable()
-{
-        SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, m_wasEnabled, 0, 0);
-
-        // restore password protection
-        if (m_wasSecure) {
-                setSecure(true, m_wasSecureAnInt);
-        }
-
-        // restore display power down
-        CArchMiscWindows::removeBusyState(CArchMiscWindows::kDISPLAY);
-}
-
-void
-CMSWindowsScreenSaver::disable()
-{
-        SystemParametersInfo(SPI_GETSCREENSAVEACTIVE, 0, &m_wasEnabled, 0);
-        SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, FALSE, 0, 0);
-
-        // disable password protected screensaver
-        m_wasSecure = isSecure(&m_wasSecureAnInt);
-        if (m_wasSecure) {
-                setSecure(false, m_wasSecureAnInt);
-        }
-
-        // disable display power down
-        CArchMiscWindows::addBusyState(CArchMiscWindows::kDISPLAY);
-}
-
-void
-CMSWindowsScreenSaver::activate()
-{
-        // don't activate if already active
-        if (!isActive()) {
-                // activate
-                HWND hwnd = GetForegroundWindow();
-                if (hwnd != NULL) {
-                        PostMessage(hwnd, WM_SYSCOMMAND, SC_SCREENSAVE, 0);
-                }
-                else {
-                        // no foreground window.  pretend we got the event instead.
-                        DefWindowProc(NULL, WM_SYSCOMMAND, SC_SCREENSAVE, 0);
-                }
-
-                // restore power save when screen saver activates
-                CArchMiscWindows::removeBusyState(CArchMiscWindows::kDISPLAY);
-        }
-}
-
-void
-CMSWindowsScreenSaver::deactivate()
-{
-        bool killed = false;
-        if (!m_is95Family) {
-                // NT runs screen saver in another desktop
-                HDESK desktop = OpenDesktop("Screen-saver", 0, FALSE,
-                                                                DESKTOP_READOBJECTS | DESKTOP_WRITEOBJECTS);
-                if (desktop != NULL) {
-                        EnumDesktopWindows(desktop,
-                                                                &CMSWindowsScreenSaver::killScreenSaverFunc,
-                                                                reinterpret_cast<LPARAM>(&killed));
-                        CloseDesktop(desktop);
-                }
-        }
-
-        // if above failed or wasn't tried, try the windows 95 way
-        if (!killed) {
-                // find screen saver window and close it
-                HWND hwnd = FindWindow("WindowsScreenSaverClass", NULL);
-                if (hwnd == NULL) {
-                        // win2k may use a different class
-                        hwnd = FindWindow("Default Screen Saver", NULL);
-                }
-                if (hwnd != NULL) {
-                        PostMessage(hwnd, WM_CLOSE, 0, 0);
-                }
-        }
-
-        // force timer to restart
-        SystemParametersInfo(SPI_GETSCREENSAVEACTIVE, 0, &m_wasEnabled, 0);
-        SystemParametersInfo(SPI_SETSCREENSAVEACTIVE,
-                                                                !m_wasEnabled, 0, SPIF_SENDWININICHANGE);
-        SystemParametersInfo(SPI_SETSCREENSAVEACTIVE,
-                                                                 m_wasEnabled, 0, SPIF_SENDWININICHANGE);
-
-        // disable display power down
-        CArchMiscWindows::removeBusyState(CArchMiscWindows::kDISPLAY);
-}
-
-bool
-CMSWindowsScreenSaver::isActive() const
-{
-        if (m_is95) {
-                return (FindWindow("WindowsScreenSaverClass", NULL) != NULL);
-        }
-        else if (m_isNT) {
-                // screen saver runs on a separate desktop
-                HDESK desktop = OpenDesktop("Screen-saver", 0, FALSE, MAXIMUM_ALLOWED);
-                if (desktop == NULL && GetLastError() != ERROR_ACCESS_DENIED) {
-                        // desktop doesn't exist so screen saver is not running
-                        return false;
-                }
-
-                // desktop exists.  this should indicate that the screen saver
-                // is running but an OS bug can cause a valid handle to be
-                // returned even if the screen saver isn't running (Q230117).
-                // we'll try to enumerate the windows on the desktop and, if
-                // there are any, we assume the screen saver is running.  (note
-                // that if we don't have permission to enumerate then we'll
-                // assume that the screen saver is not running.)  that'd be
-                // easy enough except there's another OS bug (Q198590) that can
-                // cause EnumDesktopWindows() to enumerate the windows of
-                // another desktop if the requested desktop has no windows.  to
-                // work around that we have to verify that the enumerated
-                // windows are, in fact, on the expected desktop.
-                CFindScreenSaverInfo info;
-                info.m_desktop = desktop;
-                info.m_window  = NULL;
-                EnumDesktopWindows(desktop,
-                                                                &CMSWindowsScreenSaver::findScreenSaverFunc,
-                                                                reinterpret_cast<LPARAM>(&info));
-
-                // done with desktop
-                CloseDesktop(desktop);
-
-                // screen saver is running if a window was found
-                return (info.m_window != NULL);
-        }
-        else {
-                BOOL running;
-                SystemParametersInfo(SPI_GETSCREENSAVERRUNNING, 0, &running, 0);
-                return (running != FALSE);
-        }
-}
-
-BOOL CALLBACK
-CMSWindowsScreenSaver::findScreenSaverFunc(HWND hwnd, LPARAM arg)
-{
-        CFindScreenSaverInfo* info = reinterpret_cast<CFindScreenSaverInfo*>(arg);
-
-        if (info->m_desktop != NULL) {
-                DWORD threadID = GetWindowThreadProcessId(hwnd, NULL);
-                HDESK desktop  = GetThreadDesktop(threadID);
-                if (desktop != NULL && desktop != info->m_desktop) {
-                        // stop enumerating -- wrong desktop
-                        return FALSE;
-                }
-        }
-
-        // found a window
-        info->m_window = hwnd;
-
-        // don't need to enumerate further
-        return FALSE;
-}
-
-BOOL CALLBACK
-CMSWindowsScreenSaver::killScreenSaverFunc(HWND hwnd, LPARAM arg)
-{
-        if (IsWindowVisible(hwnd)) {
-                HINSTANCE instance = (HINSTANCE)GetWindowLong(hwnd, GWL_HINSTANCE);
-                if (instance != CMSWindowsScreen::getInstance()) {
-                        PostMessage(hwnd, WM_CLOSE, 0, 0);
-                        *reinterpret_cast<bool*>(arg) = true;
-                }
-        }
-        return TRUE;
-}
-
-DWORD
-CMSWindowsScreenSaver::findScreenSaver()
-{
-        // try windows 95 way
-        HWND hwnd = FindWindow("WindowsScreenSaverClass", NULL);
-
-        // get process ID of process that owns the window, if found
-        if (hwnd != NULL) {
-                DWORD processID;
-                GetWindowThreadProcessId(hwnd, &processID);
-                return processID;
-        }
-
-        // not found
-        return 0;
-}
-
-void
-CMSWindowsScreenSaver::watchDesktop()
-{
-        // stop watching previous process/desktop
-        unwatchProcess();
-
-        // watch desktop in another thread
-        LOG((CLOG_DEBUG "watching screen saver desktop"));
-        m_active = true;
-        m_watch  = new CThread(new TMethodJob<CMSWindowsScreenSaver>(this,
-                                                                &CMSWindowsScreenSaver::watchDesktopThread));
-}
-
-void
-CMSWindowsScreenSaver::watchProcess(HANDLE process)
-{
-        // stop watching previous process/desktop
-        unwatchProcess();
-
-        // watch new process in another thread
-        if (process != NULL) {
-                LOG((CLOG_DEBUG "watching screen saver process"));
-                m_process = process;
-                m_active  = true;
-                m_watch   = new CThread(new TMethodJob<CMSWindowsScreenSaver>(this,
-                                                                &CMSWindowsScreenSaver::watchProcessThread));
-        }
-}
-
-void
-CMSWindowsScreenSaver::unwatchProcess()
-{
-        if (m_watch != NULL) {
-                LOG((CLOG_DEBUG "stopped watching screen saver process/desktop"));
-                m_watch->cancel();
-                m_watch->wait();
-                delete m_watch;
-                m_watch  = NULL;
-                m_active = false;
-        }
-        if (m_process != NULL) {
-                CloseHandle(m_process);
-                m_process = NULL;
-        }
-}
-
-void
-CMSWindowsScreenSaver::watchDesktopThread(void*)
-{
-        DWORD reserved = 0;
-        TCHAR* name    = NULL;
-
-        for (;;) {
-                // wait a bit
-                ARCH->sleep(0.2);
-
-                if (m_isNT) {
-                        // get current desktop
-                        HDESK desk = OpenInputDesktop(0, FALSE, GENERIC_READ);
-                        if (desk == NULL) {
-                                // can't open desktop so keep waiting
-                                continue;
-                        }
-
-                        // get current desktop name length
-                        DWORD size;
-                        GetUserObjectInformation(desk, UOI_NAME, NULL, 0, &size);
-
-                        // allocate more space for the name, if necessary
-                        if (size > reserved) {
-                                reserved = size;
-                                name     = (TCHAR*)alloca(reserved + sizeof(TCHAR));
-                        }
-
-                        // get current desktop name
-                        GetUserObjectInformation(desk, UOI_NAME, name, size, &size);
-                        CloseDesktop(desk);
-
-                        // compare name to screen saver desktop name
-                        if (_tcsicmp(name, TEXT("Screen-saver")) == 0) {
-                                // still the screen saver desktop so keep waiting
-                                continue;
-                        }
-                }
-                else {
-                        // 2000/XP have a sane way to detect a runnin screensaver.
-                        BOOL running;
-                        SystemParametersInfo(SPI_GETSCREENSAVERRUNNING, 0, &running, 0);
-                        if (running) {
-                                continue;
-                        }
-                }
-
-                // send screen saver deactivation message
-                m_active = false;
-                PostThreadMessage(m_threadID, m_msg, m_wParam, m_lParam);
-                return;
-        }
-}
-
-void
-CMSWindowsScreenSaver::watchProcessThread(void*)
-{
-        for (;;) {
-                CThread::testCancel();
-                if (WaitForSingleObject(m_process, 50) == WAIT_OBJECT_0) {
-                        // process terminated
-                        LOG((CLOG_DEBUG "screen saver died"));
-
-                        // send screen saver deactivation message
-                        m_active = false;
-                        PostThreadMessage(m_threadID, m_msg, m_wParam, m_lParam);
-                        return;
-                }
-        }
-}
-
-void
-CMSWindowsScreenSaver::setSecure(bool secure, bool saveSecureAsInt)
-{
-        HKEY hkey =
-                CArchMiscWindows::addKey(HKEY_CURRENT_USER, g_pathScreenSaverIsSecure);
-        if (hkey == NULL) {
-                return;
-        }
-
-        const TCHAR* isSecure = m_is95Family ? g_isSecure9x : g_isSecureNT;
-        if (saveSecureAsInt) {
-                CArchMiscWindows::setValue(hkey, isSecure, secure ? 1 : 0);
-        }
-        else {
-                CArchMiscWindows::setValue(hkey, isSecure, secure ? "1" : "0");
-        }
-
-        CArchMiscWindows::closeKey(hkey);
-}
-
-bool
-CMSWindowsScreenSaver::isSecure(bool* wasSecureFlagAnInt) const
-{
-        // get the password protection setting key
-        HKEY hkey =
-                CArchMiscWindows::openKey(HKEY_CURRENT_USER, g_pathScreenSaverIsSecure);
-        if (hkey == NULL) {
-                return false;
-        }
-
-        // get the value.  the value may be an int or a string, depending
-        // on the version of windows.
-        bool result;
-        const TCHAR* isSecure = m_is95Family ? g_isSecure9x : g_isSecureNT;
-        switch (CArchMiscWindows::typeOfValue(hkey, isSecure)) {
-        default:
-                result = false;
-                break;
-
-        case CArchMiscWindows::kUINT: {
-                DWORD value =
-                        CArchMiscWindows::readValueInt(hkey, isSecure);
-                *wasSecureFlagAnInt = true;
-                result = (value != 0);
-                break;
-        }
-
-        case CArchMiscWindows::kSTRING: {
-                std::string value =
-                        CArchMiscWindows::readValueString(hkey, isSecure);
-                *wasSecureFlagAnInt = false;
-                result = (value != "0");
-                break;
-        }
-        }
-
-        CArchMiscWindows::closeKey(hkey);
-        return result;
-}