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barrier/lib/platform/CMSWindowsDesks.cpp

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/*
* synergy -- mouse and keyboard sharing utility
* Copyright (C) 2004 Chris Schoeneman
*
* This package is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* found in the file COPYING that should have accompanied this file.
*
* This package 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.
*/
#include "CMSWindowsDesks.h"
#include "CMSWindowsScreen.h"
#include "IScreenSaver.h"
#include "XScreen.h"
#include "CLock.h"
#include "CThread.h"
#include "CLog.h"
#include "IEventQueue.h"
#include "IJob.h"
#include "TMethodEventJob.h"
#include "TMethodJob.h"
#include "CArchMiscWindows.h"
#include <malloc.h>
// these are only defined when WINVER >= 0x0500
#if !defined(SPI_GETMOUSESPEED)
#define SPI_GETMOUSESPEED 112
#endif
#if !defined(SPI_SETMOUSESPEED)
#define SPI_SETMOUSESPEED 113
#endif
// X button stuff
#if !defined(WM_XBUTTONDOWN)
#define WM_XBUTTONDOWN 0x020B
#define WM_XBUTTONUP 0x020C
#define WM_XBUTTONDBLCLK 0x020D
#define WM_NCXBUTTONDOWN 0x00AB
#define WM_NCXBUTTONUP 0x00AC
#define WM_NCXBUTTONDBLCLK 0x00AD
#define MOUSEEVENTF_XDOWN 0x0100
#define MOUSEEVENTF_XUP 0x0200
#define XBUTTON1 0x0001
#define XBUTTON2 0x0002
#endif
#if !defined(VK_XBUTTON1)
#define VK_XBUTTON1 0x05
#define VK_XBUTTON2 0x06
#endif
// <unused>; <unused>
#define SYNERGY_MSG_SWITCH SYNERGY_HOOK_LAST_MSG + 1
// <unused>; <unused>
#define SYNERGY_MSG_ENTER SYNERGY_HOOK_LAST_MSG + 2
// <unused>; <unused>
#define SYNERGY_MSG_LEAVE SYNERGY_HOOK_LAST_MSG + 3
// wParam = flags, HIBYTE(lParam) = virtual key, LOBYTE(lParam) = scan code
#define SYNERGY_MSG_FAKE_KEY SYNERGY_HOOK_LAST_MSG + 4
// flags, XBUTTON id
#define SYNERGY_MSG_FAKE_BUTTON SYNERGY_HOOK_LAST_MSG + 5
// x; y
#define SYNERGY_MSG_FAKE_MOVE SYNERGY_HOOK_LAST_MSG + 6
// delta; <unused>
#define SYNERGY_MSG_FAKE_WHEEL SYNERGY_HOOK_LAST_MSG + 7
// POINT*; <unused>
#define SYNERGY_MSG_CURSOR_POS SYNERGY_HOOK_LAST_MSG + 8
// IKeyState*; <unused>
#define SYNERGY_MSG_SYNC_KEYS SYNERGY_HOOK_LAST_MSG + 9
// install; <unused>
#define SYNERGY_MSG_SCREENSAVER SYNERGY_HOOK_LAST_MSG + 10
// dx; dy
#define SYNERGY_MSG_FAKE_REL_MOVE SYNERGY_HOOK_LAST_MSG + 11
//
// CMSWindowsDesks
//
CMSWindowsDesks::CMSWindowsDesks(
bool isPrimary, HINSTANCE hookLibrary,
const IScreenSaver* screensaver, IJob* updateKeys) :
m_isPrimary(isPrimary),
m_is95Family(CArchMiscWindows::isWindows95Family()),
m_isOnScreen(m_isPrimary),
m_x(0), m_y(0),
m_w(0), m_h(0),
m_xCenter(0), m_yCenter(0),
m_multimon(false),
m_timer(NULL),
m_screensaver(screensaver),
m_screensaverNotify(false),
m_activeDesk(NULL),
m_activeDeskName(),
m_mutex(),
m_deskReady(&m_mutex, false),
m_updateKeys(updateKeys)
{
queryHookLibrary(hookLibrary);
m_cursor = createBlankCursor();
m_deskClass = createDeskWindowClass(m_isPrimary);
m_keyLayout = GetKeyboardLayout(GetCurrentThreadId());
}
CMSWindowsDesks::~CMSWindowsDesks()
{
disable();
destroyClass(m_deskClass);
destroyCursor(m_cursor);
delete m_updateKeys;
}
void
CMSWindowsDesks::enable()
{
m_threadID = GetCurrentThreadId();
// set the active desk and (re)install the hooks
checkDesk();
// install the desk timer. this timer periodically checks
// which desk is active and reinstalls the hooks as necessary.
// we wouldn't need this if windows notified us of a desktop
// change but as far as i can tell it doesn't.
m_timer = EVENTQUEUE->newTimer(0.2, NULL);
EVENTQUEUE->adoptHandler(CEvent::kTimer, m_timer,
new TMethodEventJob<CMSWindowsDesks>(
this, &CMSWindowsDesks::handleCheckDesk));
updateKeys();
}
void
CMSWindowsDesks::disable()
{
// remove timer
if (m_timer != NULL) {
EVENTQUEUE->removeHandler(CEvent::kTimer, m_timer);
EVENTQUEUE->deleteTimer(m_timer);
m_timer = NULL;
}
// destroy desks
removeDesks();
m_isOnScreen = m_isPrimary;
}
void
CMSWindowsDesks::enter()
{
sendMessage(SYNERGY_MSG_ENTER, 0, 0);
}
void
CMSWindowsDesks::leave(HKL keyLayout)
{
sendMessage(SYNERGY_MSG_LEAVE, (WPARAM)keyLayout, 0);
}
void
CMSWindowsDesks::updateKeys()
{
sendMessage(SYNERGY_MSG_SYNC_KEYS, 0, 0);
}
void
CMSWindowsDesks::setShape(SInt32 x, SInt32 y,
SInt32 width, SInt32 height,
SInt32 xCenter, SInt32 yCenter, bool isMultimon)
{
m_x = x;
m_y = y;
m_w = width;
m_h = height;
m_xCenter = xCenter;
m_yCenter = yCenter;
m_multimon = isMultimon;
}
void
CMSWindowsDesks::installScreensaverHooks(bool install)
{
if (m_isPrimary && m_screensaverNotify != install) {
m_screensaverNotify = install;
sendMessage(SYNERGY_MSG_SCREENSAVER, install, 0);
}
}
void
CMSWindowsDesks::getCursorPos(SInt32& x, SInt32& y) const
{
POINT pos;
sendMessage(SYNERGY_MSG_CURSOR_POS, reinterpret_cast<WPARAM>(&pos), 0);
x = pos.x;
y = pos.y;
}
void
CMSWindowsDesks::fakeKeyEvent(
KeyButton button, UINT virtualKey,
bool press, bool /*isAutoRepeat*/) const
{
// win 95 family doesn't understand handed modifier virtual keys
if (m_is95Family) {
switch (virtualKey) {
case VK_LSHIFT:
case VK_RSHIFT:
virtualKey = VK_SHIFT;
break;
case VK_LCONTROL:
case VK_RCONTROL:
virtualKey = VK_CONTROL;
break;
case VK_LMENU:
case VK_RMENU:
virtualKey = VK_MENU;
break;
}
}
// synthesize event
DWORD flags = 0;
if (((button & 0x100u) != 0)) {
flags |= KEYEVENTF_EXTENDEDKEY;
}
if (!press) {
flags |= KEYEVENTF_KEYUP;
}
sendMessage(SYNERGY_MSG_FAKE_KEY, flags,
MAKEWORD(static_cast<BYTE>(button & 0xffu),
static_cast<BYTE>(virtualKey & 0xffu)));
}
void
CMSWindowsDesks::fakeMouseButton(ButtonID button, bool press) const
{
// the system will swap the meaning of left/right for us if
// the user has configured a left-handed mouse but we don't
// want it to swap since we want the handedness of the
// server's mouse. so pre-swap for a left-handed mouse.
if (GetSystemMetrics(SM_SWAPBUTTON)) {
switch (button) {
case kButtonLeft:
button = kButtonRight;
break;
case kButtonRight:
button = kButtonLeft;
break;
}
}
// map button id to button flag and button data
DWORD data = 0;
DWORD flags;
switch (button) {
case kButtonLeft:
flags = press ? MOUSEEVENTF_LEFTDOWN : MOUSEEVENTF_LEFTUP;
break;
case kButtonMiddle:
flags = press ? MOUSEEVENTF_MIDDLEDOWN : MOUSEEVENTF_MIDDLEUP;
break;
case kButtonRight:
flags = press ? MOUSEEVENTF_RIGHTDOWN : MOUSEEVENTF_RIGHTUP;
break;
case kButtonExtra0 + 0:
data = XBUTTON1;
flags = press ? MOUSEEVENTF_XDOWN : MOUSEEVENTF_XUP;
break;
case kButtonExtra0 + 1:
data = XBUTTON2;
flags = press ? MOUSEEVENTF_XDOWN : MOUSEEVENTF_XUP;
break;
default:
return;
}
// do it
sendMessage(SYNERGY_MSG_FAKE_BUTTON, flags, data);
}
void
CMSWindowsDesks::fakeMouseMove(SInt32 x, SInt32 y) const
{
sendMessage(SYNERGY_MSG_FAKE_MOVE,
static_cast<WPARAM>(x),
static_cast<LPARAM>(y));
}
void
CMSWindowsDesks::fakeMouseRelativeMove(SInt32 dx, SInt32 dy) const
{
sendMessage(SYNERGY_MSG_FAKE_REL_MOVE,
static_cast<WPARAM>(dx),
static_cast<LPARAM>(dy));
}
void
CMSWindowsDesks::fakeMouseWheel(SInt32 delta) const
{
sendMessage(SYNERGY_MSG_FAKE_WHEEL, delta, 0);
}
void
CMSWindowsDesks::sendMessage(UINT msg, WPARAM wParam, LPARAM lParam) const
{
if (m_activeDesk != NULL && m_activeDesk->m_window != NULL) {
PostThreadMessage(m_activeDesk->m_threadID, msg, wParam, lParam);
waitForDesk();
}
}
void
CMSWindowsDesks::queryHookLibrary(HINSTANCE hookLibrary)
{
// look up functions
if (m_isPrimary) {
m_install = (InstallFunc)GetProcAddress(hookLibrary, "install");
m_uninstall = (UninstallFunc)GetProcAddress(hookLibrary, "uninstall");
m_installScreensaver =
(InstallScreenSaverFunc)GetProcAddress(
hookLibrary, "installScreenSaver");
m_uninstallScreensaver =
(UninstallScreenSaverFunc)GetProcAddress(
hookLibrary, "uninstallScreenSaver");
if (m_install == NULL ||
m_uninstall == NULL ||
m_installScreensaver == NULL ||
m_uninstallScreensaver == NULL) {
LOG((CLOG_ERR "Invalid hook library"));
throw XScreenOpenFailure();
}
}
else {
m_install = NULL;
m_uninstall = NULL;
m_installScreensaver = NULL;
m_uninstallScreensaver = NULL;
}
}
HCURSOR
CMSWindowsDesks::createBlankCursor() const
{
// create a transparent cursor
int cw = GetSystemMetrics(SM_CXCURSOR);
int ch = GetSystemMetrics(SM_CYCURSOR);
UInt8* cursorAND = new UInt8[ch * ((cw + 31) >> 2)];
UInt8* cursorXOR = new UInt8[ch * ((cw + 31) >> 2)];
memset(cursorAND, 0xff, ch * ((cw + 31) >> 2));
memset(cursorXOR, 0x00, ch * ((cw + 31) >> 2));
HCURSOR c = CreateCursor(CMSWindowsScreen::getInstance(),
0, 0, cw, ch, cursorAND, cursorXOR);
delete[] cursorXOR;
delete[] cursorAND;
return c;
}
void
CMSWindowsDesks::destroyCursor(HCURSOR cursor) const
{
if (cursor != NULL) {
DestroyCursor(cursor);
}
}
ATOM
CMSWindowsDesks::createDeskWindowClass(bool isPrimary) const
{
WNDCLASSEX classInfo;
classInfo.cbSize = sizeof(classInfo);
classInfo.style = CS_DBLCLKS | CS_NOCLOSE;
classInfo.lpfnWndProc = isPrimary ?
&CMSWindowsDesks::primaryDeskProc :
&CMSWindowsDesks::secondaryDeskProc;
classInfo.cbClsExtra = 0;
classInfo.cbWndExtra = 0;
classInfo.hInstance = CMSWindowsScreen::getInstance();
classInfo.hIcon = NULL;
classInfo.hCursor = m_cursor;
classInfo.hbrBackground = NULL;
classInfo.lpszMenuName = NULL;
classInfo.lpszClassName = "SynergyDesk";
classInfo.hIconSm = NULL;
return RegisterClassEx(&classInfo);
}
void
CMSWindowsDesks::destroyClass(ATOM windowClass) const
{
if (windowClass != 0) {
UnregisterClass(reinterpret_cast<LPCTSTR>(windowClass),
CMSWindowsScreen::getInstance());
}
}
HWND
CMSWindowsDesks::createWindow(ATOM windowClass, const char* name) const
{
HWND window = CreateWindowEx(WS_EX_TOPMOST |
WS_EX_TRANSPARENT |
WS_EX_TOOLWINDOW,
reinterpret_cast<LPCTSTR>(windowClass),
name,
WS_POPUP,
0, 0, 1, 1,
NULL, NULL,
CMSWindowsScreen::getInstance(),
NULL);
if (window == NULL) {
LOG((CLOG_ERR "failed to create window: %d", GetLastError()));
throw XScreenOpenFailure();
}
return window;
}
void
CMSWindowsDesks::destroyWindow(HWND hwnd) const
{
if (hwnd != NULL) {
DestroyWindow(hwnd);
}
}
LRESULT CALLBACK
CMSWindowsDesks::primaryDeskProc(
HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
return DefWindowProc(hwnd, msg, wParam, lParam);
}
LRESULT CALLBACK
CMSWindowsDesks::secondaryDeskProc(
HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
// would like to detect any local user input and hide the hider
// window but for now we just detect mouse motion.
bool hide = false;
switch (msg) {
case WM_MOUSEMOVE:
if (LOWORD(lParam) != 0 || HIWORD(lParam) != 0) {
hide = true;
}
break;
}
if (hide && IsWindowVisible(hwnd)) {
ReleaseCapture();
SetWindowPos(hwnd, HWND_BOTTOM, 0, 0, 0, 0,
SWP_NOMOVE | SWP_NOSIZE |
SWP_NOACTIVATE | SWP_HIDEWINDOW);
}
return DefWindowProc(hwnd, msg, wParam, lParam);
}
void
CMSWindowsDesks::deskMouseMove(SInt32 x, SInt32 y) const
{
// motion is simple (i.e. it's on the primary monitor) if there
// is only one monitor. it's also simple if we're not on the
// windows 95 family since those platforms don't have a broken
// mouse_event() function (see the comment below).
bool simple = (!m_multimon || !m_is95Family);
if (!simple) {
// also simple if motion is within the primary monitor
simple = (x >= 0 && x < GetSystemMetrics(SM_CXSCREEN) &&
y >= 0 && y < GetSystemMetrics(SM_CYSCREEN));
}
// move the mouse directly to target position if motion is simple
if (simple) {
// when using absolute positioning with mouse_event(),
// the normalized device coordinates range over only
// the primary screen.
SInt32 w = GetSystemMetrics(SM_CXSCREEN);
SInt32 h = GetSystemMetrics(SM_CYSCREEN);
mouse_event(MOUSEEVENTF_MOVE | MOUSEEVENTF_ABSOLUTE,
(DWORD)((65535.0f * x) / (w - 1) + 0.5f),
(DWORD)((65535.0f * y) / (h - 1) + 0.5f),
0, 0);
}
// windows 98 and Me are broken. you cannot set the absolute
// position of the mouse except on the primary monitor but you
// can do relative moves onto any monitor. this is, in microsoft's
// words, "by design." apparently the designers of windows 2000
// we're a little less lazy and did it right.
//
// microsoft recommends in Q193003 to absolute position the cursor
// somewhere on the primary monitor then relative move to the
// desired location. this doesn't work for us because when the
// user drags a scrollbar, a window, etc. it causes the dragged
// item to jump back and forth between the position on the primary
// monitor and the desired position. while it always ends up in
// the right place, the effect is disconcerting.
//
// instead we'll get the cursor's current position and do just a
// relative move from there to the desired position.
else {
POINT pos;
GetCursorPos(&pos);
deskMouseRelativeMove(x - pos.x, y - pos.y);
}
}
void
CMSWindowsDesks::deskMouseRelativeMove(SInt32 dx, SInt32 dy) const
{
// relative moves are subject to cursor acceleration which we don't
// want.so we disable acceleration, do the relative move, then
// restore acceleration. there's a slight chance we'll end up in
// the wrong place if the user moves the cursor using this system's
// mouse while simultaneously moving the mouse on the server
// system. that defeats the purpose of synergy so we'll assume
// that won't happen. even if it does, the next mouse move will
// correct the position.
// save mouse speed & acceleration
int oldSpeed[4];
bool accelChanged =
SystemParametersInfo(SPI_GETMOUSE,0, oldSpeed, 0) &&
SystemParametersInfo(SPI_GETMOUSESPEED, 0, oldSpeed + 3, 0);
// use 1:1 motion
if (accelChanged) {
int newSpeed[4] = { 0, 0, 0, 1 };
accelChanged =
SystemParametersInfo(SPI_SETMOUSE, 0, newSpeed, 0) ||
SystemParametersInfo(SPI_SETMOUSESPEED, 0, newSpeed + 3, 0);
}
// move relative to mouse position
mouse_event(MOUSEEVENTF_MOVE, dx, dy, 0, 0);
// restore mouse speed & acceleration
if (accelChanged) {
SystemParametersInfo(SPI_SETMOUSE, 0, oldSpeed, 0);
SystemParametersInfo(SPI_SETMOUSESPEED, 0, oldSpeed + 3, 0);
}
}
void
CMSWindowsDesks::deskEnter(CDesk* desk)
{
if (!m_isPrimary) {
ReleaseCapture();
}
ShowCursor(TRUE);
SetWindowPos(desk->m_window, HWND_BOTTOM, 0, 0, 0, 0,
SWP_NOMOVE | SWP_NOSIZE |
SWP_NOACTIVATE | SWP_HIDEWINDOW);
// this is here only because of the "ConsoleWindowClass" stuff in
// deskLeave.
EnableWindow(desk->m_window, desk->m_lowLevel ? FALSE : TRUE);
}
void
CMSWindowsDesks::deskLeave(CDesk* desk, HKL keyLayout)
{
ShowCursor(FALSE);
if (m_isPrimary) {
// update key state
m_updateKeys->run();
// map a window to hide the cursor and to use whatever keyboard
// layout we choose rather than the keyboard layout of the last
// active window.
int x, y, w, h;
if (desk->m_lowLevel) {
// with a low level hook the cursor will never budge so
// just a 1x1 window is sufficient.
x = m_xCenter;
y = m_yCenter;
w = 1;
h = 1;
}
else {
// with regular hooks the cursor will jitter as it's moved
// by the user then back to the center by us. to be sure
// we never lose it, cover all the monitors with the window.
x = m_x;
y = m_y;
w = m_w;
h = m_h;
}
SetWindowPos(desk->m_window, HWND_TOPMOST, x, y, w, h,
SWP_NOACTIVATE | SWP_SHOWWINDOW);
// if not using low-level hooks we have to also activate the
// window to ensure we don't lose keyboard focus.
// FIXME -- see if this can be avoided. if so then always
// disable the window (see handling of SYNERGY_MSG_SWITCH).
if (!desk->m_lowLevel) {
SetActiveWindow(desk->m_window);
}
// if the active window is a console then activate our window.
// we do this because for some reason our hook reports unshifted
// characters when the shift is down and a console window is
// active. interestingly we do see the shift key go down and up.
// note that we must enable the window to activate it and we
// need to disable the window on deskEnter.
// FIXME -- figure out the real problem here and solve it.
else {
HWND foreground = GetForegroundWindow();
if (foreground != NULL) {
char className[40];
if (GetClassName(foreground, className,
sizeof(className) / sizeof(className[0])) &&
strcmp(className, "ConsoleWindowClass") == 0) {
EnableWindow(desk->m_window, TRUE);
SetActiveWindow(desk->m_window);
}
LOG((CLOG_DEBUG1 "active window class: %s", className));
}
}
// switch to requested keyboard layout
ActivateKeyboardLayout(keyLayout, 0);
}
else {
// move hider window under the cursor center, raise, and show it
SetWindowPos(desk->m_window, HWND_TOPMOST,
m_xCenter, m_yCenter, 1, 1,
SWP_NOACTIVATE | SWP_SHOWWINDOW);
// watch for mouse motion. if we see any then we hide the
// hider window so the user can use the physically attached
// mouse if desired. we'd rather not capture the mouse but
// we aren't notified when the mouse leaves our window.
SetCapture(desk->m_window);
// warp the mouse to the cursor center
deskMouseMove(m_xCenter, m_yCenter);
}
}
void
CMSWindowsDesks::deskThread(void* vdesk)
{
MSG msg;
// use given desktop for this thread
CDesk* desk = reinterpret_cast<CDesk*>(vdesk);
desk->m_threadID = GetCurrentThreadId();
desk->m_window = NULL;
if (desk->m_desk != NULL && SetThreadDesktop(desk->m_desk) != 0) {
// create a message queue
PeekMessage(&msg, NULL, 0,0, PM_NOREMOVE);
// create a window. we use this window to hide the cursor.
try {
desk->m_window = createWindow(m_deskClass, "SynergyDesk");
LOG((CLOG_DEBUG "desk %s window is 0x%08x", desk->m_name.c_str(), desk->m_window));
}
catch (...) {
// ignore
LOG((CLOG_DEBUG "can't create desk window for %s", desk->m_name.c_str()));
}
}
// tell main thread that we're ready
{
CLock lock(&m_mutex);
m_deskReady = true;
m_deskReady.broadcast();
}
while (GetMessage(&msg, NULL, 0, 0)) {
switch (msg.message) {
default:
TranslateMessage(&msg);
DispatchMessage(&msg);
continue;
case SYNERGY_MSG_SWITCH:
if (m_isPrimary) {
m_uninstall();
if (m_screensaverNotify) {
m_uninstallScreensaver();
m_installScreensaver();
}
switch (m_install()) {
case kHOOK_FAILED:
// we won't work on this desk
desk->m_lowLevel = false;
break;
case kHOOK_OKAY:
desk->m_lowLevel = false;
break;
case kHOOK_OKAY_LL:
desk->m_lowLevel = true;
break;
}
// a window on the primary screen with low-level hooks
// should never activate.
EnableWindow(desk->m_window, desk->m_lowLevel ? FALSE : TRUE);
}
break;
case SYNERGY_MSG_ENTER:
m_isOnScreen = true;
deskEnter(desk);
break;
case SYNERGY_MSG_LEAVE:
m_isOnScreen = false;
m_keyLayout = (HKL)msg.wParam;
deskLeave(desk, m_keyLayout);
break;
case SYNERGY_MSG_FAKE_KEY:
keybd_event(HIBYTE(msg.lParam), LOBYTE(msg.lParam), msg.wParam, 0);
break;
case SYNERGY_MSG_FAKE_BUTTON:
if (msg.wParam != 0) {
mouse_event(msg.wParam, 0, 0, msg.lParam, 0);
}
break;
case SYNERGY_MSG_FAKE_MOVE:
deskMouseMove(static_cast<SInt32>(msg.wParam),
static_cast<SInt32>(msg.lParam));
break;
case SYNERGY_MSG_FAKE_REL_MOVE:
deskMouseRelativeMove(static_cast<SInt32>(msg.wParam),
static_cast<SInt32>(msg.lParam));
break;
case SYNERGY_MSG_FAKE_WHEEL:
mouse_event(MOUSEEVENTF_WHEEL, 0, 0, msg.wParam, 0);
break;
case SYNERGY_MSG_CURSOR_POS: {
POINT* pos = reinterpret_cast<POINT*>(msg.wParam);
if (!GetCursorPos(pos)) {
pos->x = m_xCenter;
pos->y = m_yCenter;
}
break;
}
case SYNERGY_MSG_SYNC_KEYS:
m_updateKeys->run();
break;
case SYNERGY_MSG_SCREENSAVER:
if (msg.wParam != 0) {
m_installScreensaver();
}
else {
m_uninstallScreensaver();
}
break;
}
// notify that message was processed
CLock lock(&m_mutex);
m_deskReady = true;
m_deskReady.broadcast();
}
// clean up
deskEnter(desk);
if (desk->m_window != NULL) {
DestroyWindow(desk->m_window);
}
if (desk->m_desk != NULL) {
closeDesktop(desk->m_desk);
}
}
CMSWindowsDesks::CDesk*
CMSWindowsDesks::addDesk(const CString& name, HDESK hdesk)
{
CDesk* desk = new CDesk;
desk->m_name = name;
desk->m_desk = hdesk;
desk->m_targetID = GetCurrentThreadId();
desk->m_thread = new CThread(new TMethodJob<CMSWindowsDesks>(
this, &CMSWindowsDesks::deskThread, desk));
waitForDesk();
m_desks.insert(std::make_pair(name, desk));
return desk;
}
void
CMSWindowsDesks::removeDesks()
{
for (CDesks::iterator index = m_desks.begin();
index != m_desks.end(); ++index) {
CDesk* desk = index->second;
PostThreadMessage(desk->m_threadID, WM_QUIT, 0, 0);
desk->m_thread->wait();
delete desk->m_thread;
delete desk;
}
m_desks.clear();
m_activeDesk = NULL;
m_activeDeskName = "";
}
void
CMSWindowsDesks::checkDesk()
{
// get current desktop. if we already know about it then return.
CDesk* desk;
HDESK hdesk = openInputDesktop();
CString name = getDesktopName(hdesk);
CDesks::const_iterator index = m_desks.find(name);
if (index == m_desks.end()) {
desk = addDesk(name, hdesk);
// hold on to hdesk until thread exits so the desk can't
// be removed by the system
}
else {
closeDesktop(hdesk);
desk = index->second;
}
// if active desktop changed then tell the old and new desk threads
// about the change. don't switch desktops when the screensaver is
// active becaue we'd most likely switch to the screensaver desktop
// which would have the side effect of forcing the screensaver to
// stop.
if (name != m_activeDeskName && !m_screensaver->isActive()) {
// show cursor on previous desk
bool wasOnScreen = m_isOnScreen;
if (!wasOnScreen) {
sendMessage(SYNERGY_MSG_ENTER, 0, 0);
}
// check for desk accessibility change. we don't get events
// from an inaccessible desktop so when we switch from an
// inaccessible desktop to an accessible one we have to
// update the keyboard state.
LOG((CLOG_DEBUG "switched to desk \"%s\"", name.c_str()));
bool isAccessible = isDeskAccessible(desk);
if (isDeskAccessible(m_activeDesk) != isAccessible) {
if (isAccessible) {
LOG((CLOG_DEBUG "desktop is now accessible"));
sendMessage(SYNERGY_MSG_SYNC_KEYS, 0, 0);
}
else {
LOG((CLOG_DEBUG "desktop is now inaccessible"));
}
}
// switch desk
m_activeDesk = desk;
m_activeDeskName = name;
sendMessage(SYNERGY_MSG_SWITCH, 0, 0);
// hide cursor on new desk
if (!wasOnScreen) {
sendMessage(SYNERGY_MSG_LEAVE, (WPARAM)m_keyLayout, 0);
}
}
else if (name != m_activeDeskName) {
// screen saver might have started
PostThreadMessage(m_threadID, SYNERGY_MSG_SCREEN_SAVER, TRUE, 0);
}
}
bool
CMSWindowsDesks::isDeskAccessible(const CDesk* desk) const
{
return (desk != NULL && desk->m_desk != NULL);
}
void
CMSWindowsDesks::waitForDesk() const
{
CMSWindowsDesks* self = const_cast<CMSWindowsDesks*>(this);
CLock lock(&m_mutex);
while (!(bool)m_deskReady) {
m_deskReady.wait();
}
self->m_deskReady = false;
}
void
CMSWindowsDesks::handleCheckDesk(const CEvent&, void*)
{
checkDesk();
}
HDESK
CMSWindowsDesks::openInputDesktop()
{
if (m_is95Family) {
// there's only one desktop on windows 95 et al.
return GetThreadDesktop(GetCurrentThreadId());
}
else {
return OpenInputDesktop(DF_ALLOWOTHERACCOUNTHOOK, TRUE,
DESKTOP_CREATEWINDOW |
DESKTOP_HOOKCONTROL |
GENERIC_WRITE);
}
}
void
CMSWindowsDesks::closeDesktop(HDESK desk)
{
// on 95/98/me we don't need to close the desktop returned by
// openInputDesktop().
if (desk != NULL && !m_is95Family) {
CloseDesktop(desk);
}
}
CString
CMSWindowsDesks::getDesktopName(HDESK desk)
{
if (desk == NULL) {
return CString();
}
else if (m_is95Family) {
return "desktop";
}
else {
DWORD size;
GetUserObjectInformation(desk, UOI_NAME, NULL, 0, &size);
TCHAR* name = (TCHAR*)alloca(size + sizeof(TCHAR));
GetUserObjectInformation(desk, UOI_NAME, name, size, &size);
CString result(name);
return result;
}
}
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