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barrier/lib/platform/CMSWindowsScreen.cpp

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/*
* synergy -- mouse and keyboard sharing utility
* Copyright (C) 2002 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 "CMSWindowsScreen.h"
#include "CMSWindowsClipboard.h"
#include "CMSWindowsDesktop.h"
#include "CMSWindowsEventQueueBuffer.h"
#include "CMSWindowsScreenSaver.h"
#include "CClipboard.h"
#include "XScreen.h"
#include "CLock.h"
#include "CThread.h"
#include "CFunctionJob.h"
#include "CLog.h"
#include "CString.h"
#include "CStringUtil.h"
#include "IEventQueue.h"
#include "TMethodEventJob.h"
#include "TMethodJob.h"
#include "CArch.h"
#include "CArchMiscWindows.h"
#include <cstring>
#include <malloc.h>
#include <tchar.h>
// <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
//
// add backwards compatible multihead support (and suppress bogus warning)
//
#pragma warning(push)
#pragma warning(disable: 4706) // assignment within conditional
#define COMPILE_MULTIMON_STUBS
#include <multimon.h>
#pragma warning(pop)
// 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
//
// CMSWindowsScreen
//
HINSTANCE CMSWindowsScreen::s_instance = NULL;
CMSWindowsScreen* CMSWindowsScreen::s_screen = NULL;
CMSWindowsScreen::CMSWindowsScreen(bool isPrimary,
IJob* suspend, IJob* resume) :
m_isPrimary(isPrimary),
m_is95Family(CArchMiscWindows::isWindows95Family()),
m_isOnScreen(m_isPrimary),
m_class(0),
m_cursor(NULL),
m_window(NULL),
m_x(0), m_y(0),
m_w(0), m_h(0),
m_xCenter(0), m_yCenter(0),
m_multimon(false),
m_xCursor(0), m_yCursor(0),
m_sequenceNumber(0),
m_mark(0),
m_markReceived(0),
m_keyLayout(NULL),
m_timer(NULL),
m_screensaver(NULL),
m_screensaverNotify(false),
m_nextClipboardWindow(NULL),
m_ownClipboard(false),
m_activeDesk(NULL),
m_activeDeskName(),
m_hookLibrary(NULL),
m_init(NULL),
m_cleanup(NULL),
m_install(NULL),
m_uninstall(NULL),
m_setSides(NULL),
m_setZone(NULL),
m_setMode(NULL),
m_installScreensaver(NULL),
m_uninstallScreensaver(NULL),
m_keyState(NULL),
m_mutex(),
m_deskReady(&m_mutex, false),
m_suspend(suspend),
m_resume(resume)
{
assert(s_instance != NULL);
assert(s_screen == NULL);
s_screen = this;
try {
if (m_isPrimary) {
m_hookLibrary = openHookLibrary("synrgyhk");
}
m_cursor = createBlankCursor();
m_class = createWindowClass();
m_deskClass = createDeskWindowClass(m_isPrimary);
updateScreenShape();
m_window = createWindow(m_class, "Synergy");
m_screensaver = new CMSWindowsScreenSaver();
LOG((CLOG_DEBUG "screen shape: %d,%d %dx%d %s", m_x, m_y, m_w, m_h, m_multimon ? "(multi-monitor)" : ""));
LOG((CLOG_DEBUG "window is 0x%08x", m_window));
}
catch (...) {
delete m_screensaver;
destroyWindow(m_window);
destroyClass(m_deskClass);
destroyClass(m_class);
destroyCursor(m_cursor);
closeHookLibrary(m_hookLibrary);
m_screensaver = NULL;
m_class = 0;
m_cursor = NULL;
m_hookLibrary = NULL;
s_screen = NULL;
throw;
}
// install event handlers
EVENTQUEUE->adoptHandler(CEvent::kSystem, IEventQueue::getSystemTarget(),
new TMethodEventJob<CMSWindowsScreen>(this,
&CMSWindowsScreen::handleSystemEvent));
// install the platform event queue
EVENTQUEUE->adoptBuffer(new CMSWindowsEventQueueBuffer);
}
CMSWindowsScreen::~CMSWindowsScreen()
{
assert(s_screen != NULL);
disable();
EVENTQUEUE->adoptBuffer(NULL);
EVENTQUEUE->removeHandler(CEvent::kSystem, IEventQueue::getSystemTarget());
delete m_screensaver;
destroyWindow(m_window);
destroyClass(m_deskClass);
destroyClass(m_class);
destroyCursor(m_cursor);
closeHookLibrary(m_hookLibrary);
delete m_suspend;
delete m_resume;
s_screen = NULL;
}
void
CMSWindowsScreen::init(HINSTANCE instance)
{
assert(s_instance == NULL);
assert(instance != NULL);
s_instance = instance;
}
HINSTANCE
CMSWindowsScreen::getInstance()
{
return s_instance;
}
void
CMSWindowsScreen::setKeyState(IKeyState* keyState)
{
m_keyState = keyState;
updateKeys();
}
void
CMSWindowsScreen::enable()
{
assert(m_isOnScreen == m_isPrimary);
// install our clipboard snooper
m_nextClipboardWindow = SetClipboardViewer(m_window);
if (m_isPrimary) {
// update shadow key state
m_keyMapper.update(NULL);
// set jump zones
m_setZone(m_x, m_y, m_w, m_h, getJumpZoneSize());
// watch jump zones
m_setMode(kHOOK_WATCH_JUMP_ZONE);
}
else {
// prevent the system from entering power saving modes. if
// it did we'd be forced to disconnect from the server and
// the server would not be able to wake us up.
CArchMiscWindows::addBusyState(CArchMiscWindows::kSYSTEM);
}
// 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<CMSWindowsScreen>(
this, &CMSWindowsScreen::handleCheckDesk));
}
void
CMSWindowsScreen::disable()
{
// remove timer
if (m_timer != NULL) {
EVENTQUEUE->removeHandler(CEvent::kTimer, m_timer);
EVENTQUEUE->deleteTimer(m_timer);
m_timer = NULL;
}
if (m_isPrimary) {
// disable hooks
m_setMode(kHOOK_DISABLE);
// enable special key sequences on win95 family
enableSpecialKeys(true);
}
else {
// allow the system to enter power saving mode
CArchMiscWindows::removeBusyState(CArchMiscWindows::kSYSTEM |
CArchMiscWindows::kDISPLAY);
}
// destroy desks
removeDesks();
// stop snooping the clipboard
ChangeClipboardChain(m_window, m_nextClipboardWindow);
m_nextClipboardWindow = NULL;
m_isOnScreen = m_isPrimary;
}
void
CMSWindowsScreen::enter()
{
sendDeskMessage(SYNERGY_MSG_ENTER, 0, 0);
if (m_isPrimary) {
// enable special key sequences on win95 family
enableSpecialKeys(true);
// watch jump zones
m_setMode(kHOOK_WATCH_JUMP_ZONE);
// all messages prior to now are invalid
nextMark();
}
// now on screen
m_isOnScreen = true;
}
bool
CMSWindowsScreen::leave()
{
// get keyboard layout of foreground window. we'll use this
// keyboard layout for translating keys sent to clients.
HWND window = GetForegroundWindow();
DWORD thread = GetWindowThreadProcessId(window, NULL);
m_keyLayout = GetKeyboardLayout(thread);
// tell the key mapper about the keyboard layout
m_keyMapper.setKeyLayout(m_keyLayout);
sendDeskMessage(SYNERGY_MSG_SYNC_KEYS, 0, 0);
// tell desk that we're leaving and tell it the keyboard layout
sendDeskMessage(SYNERGY_MSG_LEAVE, (WPARAM)m_keyLayout, 0);
if (m_isPrimary) {
/* XXX
// update keys
m_keyMapper.update(NULL);
*/
// warp to center
warpCursor(m_xCenter, m_yCenter);
// disable special key sequences on win95 family
enableSpecialKeys(false);
// all messages prior to now are invalid
nextMark();
// capture events
m_setMode(kHOOK_RELAY_EVENTS);
}
// now off screen
m_isOnScreen = false;
return true;
}
bool
CMSWindowsScreen::setClipboard(ClipboardID, const IClipboard* src)
{
CMSWindowsClipboard dst(m_window);
if (src != NULL) {
// save clipboard data
return CClipboard::copy(&dst, src);
}
else {
// assert clipboard ownership
if (!dst.open(0)) {
return false;
}
dst.empty();
dst.close();
return true;
}
}
void
CMSWindowsScreen::checkClipboards()
{
// if we think we own the clipboard but we don't then somebody
// grabbed the clipboard on this screen without us knowing.
// tell the server that this screen grabbed the clipboard.
//
// this works around bugs in the clipboard viewer chain.
// sometimes NT will simply never send WM_DRAWCLIPBOARD
// messages for no apparent reason and rebooting fixes the
// problem. since we don't want a broken clipboard until the
// next reboot we do this double check. clipboard ownership
// won't be reflected on other screens until we leave but at
// least the clipboard itself will work.
if (m_ownClipboard && !CMSWindowsClipboard::isOwnedBySynergy()) {
LOG((CLOG_DEBUG "clipboard changed: lost ownership and no notification received"));
m_ownClipboard = false;
sendClipboardEvent(getClipboardGrabbedEvent(), kClipboardClipboard);
sendClipboardEvent(getClipboardGrabbedEvent(), kClipboardSelection);
}
}
void
CMSWindowsScreen::openScreensaver(bool notify)
{
assert(m_screensaver != NULL);
m_screensaverNotify = notify;
if (m_screensaverNotify) {
m_installScreensaver();
}
else {
m_screensaver->disable();
}
}
void
CMSWindowsScreen::closeScreensaver()
{
if (m_screensaver != NULL) {
if (m_screensaverNotify) {
m_uninstallScreensaver();
}
else {
m_screensaver->enable();
}
}
m_screensaverNotify = false;
}
void
CMSWindowsScreen::screensaver(bool activate)
{
assert(m_screensaver != NULL);
if (activate) {
m_screensaver->activate();
}
else {
m_screensaver->deactivate();
}
}
void
CMSWindowsScreen::resetOptions()
{
// no options
}
void
CMSWindowsScreen::setOptions(const COptionsList&)
{
// no options
}
void
CMSWindowsScreen::updateKeys()
{
sendDeskMessage(SYNERGY_MSG_SYNC_KEYS, 0, 0);
memset(m_buttons, 0, sizeof(m_buttons));
// FIXME -- get the button state
}
void
CMSWindowsScreen::setSequenceNumber(UInt32 seqNum)
{
m_sequenceNumber = seqNum;
}
bool
CMSWindowsScreen::isPrimary() const
{
return m_isPrimary;
}
void*
CMSWindowsScreen::getEventTarget() const
{
return const_cast<CMSWindowsScreen*>(this);
}
bool
CMSWindowsScreen::getClipboard(ClipboardID, IClipboard* dst) const
{
CMSWindowsClipboard src(m_window);
CClipboard::copy(dst, &src);
return true;
}
void
CMSWindowsScreen::getShape(SInt32& x, SInt32& y, SInt32& w, SInt32& h) const
{
assert(m_class != 0);
x = m_x;
y = m_y;
w = m_w;
h = m_h;
}
void
CMSWindowsScreen::getCursorPos(SInt32& x, SInt32& y) const
{
POINT pos;
sendDeskMessage(SYNERGY_MSG_CURSOR_POS,
reinterpret_cast<WPARAM>(&pos), 0);
x = pos.x;
y = pos.y;
}
void
CMSWindowsScreen::reconfigure(UInt32 activeSides)
{
assert(m_isPrimary);
LOG((CLOG_DEBUG "active sides: %x", activeSides));
m_setSides(activeSides);
}
void
CMSWindowsScreen::warpCursor(SInt32 x, SInt32 y)
{
// warp mouse
warpCursorNoFlush(x, y);
// remove all input events before and including warp
MSG msg;
while (PeekMessage(&msg, NULL, SYNERGY_MSG_INPUT_FIRST,
SYNERGY_MSG_INPUT_LAST, PM_REMOVE)) {
// do nothing
}
// save position as last position
m_xCursor = x;
m_yCursor = y;
}
SInt32
CMSWindowsScreen::getJumpZoneSize() const
{
return 1;
}
bool
CMSWindowsScreen::isAnyMouseButtonDown() const
{
static const char* buttonToName[] = {
"button 0",
"Left Button",
"Middle Button",
"Right Button",
"X Button 1",
"X Button 2"
};
for (UInt32 i = 0; i < sizeof(m_buttons) / sizeof(m_buttons[0]); ++i) {
if ((m_buttons[i] & 0x80) != 0) {
LOG((CLOG_DEBUG "locked by \"%s\"", buttonToName[i]));
return true;
}
}
return false;
}
KeyModifierMask
CMSWindowsScreen::getActiveModifiers() const
{
return m_keyMapper.getActiveModifiers();
}
void
CMSWindowsScreen::getCursorCenter(SInt32& x, SInt32& y) const
{
x = m_xCenter;
y = m_yCenter;
}
const char*
CMSWindowsScreen::getKeyName(KeyButton virtualKey) const
{
return m_keyMapper.getKeyName(virtualKey);
}
void
CMSWindowsScreen::fakeKeyEvent(KeyButton id, bool press) const
{
DWORD flags = 0;
if (m_keyMapper.isExtendedKey(id)) {
flags |= KEYEVENTF_EXTENDEDKEY;
}
if (!press) {
flags |= KEYEVENTF_KEYUP;
}
UINT vk = m_keyMapper.buttonToVirtualKey(id);
sendDeskMessage(SYNERGY_MSG_FAKE_KEY, flags,
MAKEWORD(static_cast<BYTE>(id & 0xffu),
static_cast<BYTE>(vk & 0xffu)));
}
bool
CMSWindowsScreen::fakeCtrlAltDel() const
{
if (!m_is95Family) {
// to fake ctrl+alt+del on the NT family we broadcast a suitable
// hotkey to all windows on the winlogon desktop. however, the
// current thread must be on that desktop to do the broadcast
// and we can't switch just any thread because some own windows
// or hooks. so start a new thread to do the real work.
CThread cad(new CFunctionJob(&CMSWindowsScreen::ctrlAltDelThread));
cad.wait();
}
else {
// get the sequence of keys to simulate ctrl+alt+del
IKeyState::Keystrokes keys;
KeyID key = kKeyDelete;
KeyModifierMask mask = KeyModifierControl | KeyModifierAlt;
if (mapKey(keys, *m_keyState, key, mask, false) == 0) {
keys.clear();
}
// do it
for (IKeyState::Keystrokes::const_iterator k = keys.begin();
k != keys.end(); ++k) {
fakeKeyEvent(k->m_key, k->m_press);
}
}
return true;
}
void
CMSWindowsScreen::fakeMouseButton(ButtonID id, bool press) const
{
DWORD data;
DWORD flags = mapButtonToEvent(id, press, &data);
sendDeskMessage(SYNERGY_MSG_FAKE_BUTTON, flags, data);
}
void
CMSWindowsScreen::fakeMouseMove(SInt32 x, SInt32 y) const
{
sendDeskMessage(SYNERGY_MSG_FAKE_MOVE,
static_cast<WPARAM>(x),
static_cast<LPARAM>(y));
}
void
CMSWindowsScreen::fakeMouseWheel(SInt32 delta) const
{
sendDeskMessage(SYNERGY_MSG_FAKE_WHEEL, delta, 0);
}
KeyButton
CMSWindowsScreen::mapKey(IKeyState::Keystrokes& keys,
const IKeyState& keyState, KeyID id,
KeyModifierMask desiredMask,
bool isAutoRepeat) const
{
return m_keyMapper.mapKey(keys, keyState, id, desiredMask, isAutoRepeat);
}
HINSTANCE
CMSWindowsScreen::openHookLibrary(const char* name)
{
// load the hook library
HINSTANCE hookLibrary = LoadLibrary(name);
if (hookLibrary == NULL) {
LOG((CLOG_ERR "Failed to load hook library; %s.dll is missing", name));
throw XScreenOpenFailure();
}
// look up functions
m_setSides = (SetSidesFunc)GetProcAddress(hookLibrary, "setSides");
m_setZone = (SetZoneFunc)GetProcAddress(hookLibrary, "setZone");
m_setMode = (SetModeFunc)GetProcAddress(hookLibrary, "setMode");
m_install = (InstallFunc)GetProcAddress(hookLibrary, "install");
m_uninstall = (UninstallFunc)GetProcAddress(hookLibrary, "uninstall");
m_init = (InitFunc)GetProcAddress(hookLibrary, "init");
m_cleanup = (CleanupFunc)GetProcAddress(hookLibrary, "cleanup");
m_installScreensaver =
(InstallScreenSaverFunc)GetProcAddress(
hookLibrary, "installScreenSaver");
m_uninstallScreensaver =
(UninstallScreenSaverFunc)GetProcAddress(
hookLibrary, "uninstallScreenSaver");
if (m_setSides == NULL ||
m_setZone == NULL ||
m_setMode == NULL ||
m_install == NULL ||
m_uninstall == NULL ||
m_init == NULL ||
m_cleanup == NULL ||
m_installScreensaver == NULL ||
m_uninstallScreensaver == NULL) {
LOG((CLOG_ERR "Invalid hook library; use a newer %s.dll", name));
throw XScreenOpenFailure();
}
// initialize hook library
if (m_init(GetCurrentThreadId()) == 0) {
LOG((CLOG_ERR "Cannot initialize hook library; is synergy already running?"));
throw XScreenOpenFailure();
}
return hookLibrary;
}
void
CMSWindowsScreen::closeHookLibrary(HINSTANCE hookLibrary) const
{
if (hookLibrary != NULL) {
m_cleanup();
FreeLibrary(hookLibrary);
}
}
HCURSOR
CMSWindowsScreen::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(s_instance, 0, 0, cw, ch, cursorAND, cursorXOR);
delete[] cursorXOR;
delete[] cursorAND;
return c;
}
void
CMSWindowsScreen::destroyCursor(HCURSOR cursor) const
{
if (cursor != NULL) {
DestroyCursor(cursor);
}
}
ATOM
CMSWindowsScreen::createWindowClass() const
{
WNDCLASSEX classInfo;
classInfo.cbSize = sizeof(classInfo);
classInfo.style = CS_DBLCLKS | CS_NOCLOSE;
classInfo.lpfnWndProc = &CMSWindowsScreen::wndProc;
classInfo.cbClsExtra = 0;
classInfo.cbWndExtra = 0;
classInfo.hInstance = s_instance;
classInfo.hIcon = NULL;
classInfo.hCursor = NULL;
classInfo.hbrBackground = NULL;
classInfo.lpszMenuName = NULL;
classInfo.lpszClassName = "Synergy";
classInfo.hIconSm = NULL;
return RegisterClassEx(&classInfo);
}
ATOM
CMSWindowsScreen::createDeskWindowClass(bool isPrimary) const
{
WNDCLASSEX classInfo;
classInfo.cbSize = sizeof(classInfo);
classInfo.style = CS_DBLCLKS | CS_NOCLOSE;
classInfo.lpfnWndProc = isPrimary ?
&CMSWindowsScreen::primaryDeskProc :
&CMSWindowsScreen::secondaryDeskProc;
classInfo.cbClsExtra = 0;
classInfo.cbWndExtra = 0;
classInfo.hInstance = s_instance;
classInfo.hIcon = NULL;
classInfo.hCursor = m_cursor;
classInfo.hbrBackground = NULL;
classInfo.lpszMenuName = NULL;
classInfo.lpszClassName = "SynergyDesk";
classInfo.hIconSm = NULL;
return RegisterClassEx(&classInfo);
}
void
CMSWindowsScreen::destroyClass(ATOM windowClass) const
{
if (windowClass != 0) {
UnregisterClass((LPCTSTR)windowClass, s_instance);
}
}
HWND
CMSWindowsScreen::createWindow(ATOM windowClass, const char* name) const
{
HWND window = CreateWindowEx(WS_EX_TOPMOST |
WS_EX_TRANSPARENT |
WS_EX_TOOLWINDOW,
(LPCTSTR)windowClass,
name,
WS_POPUP,
0, 0, 1, 1,
NULL, NULL,
s_instance,
NULL);
if (window == NULL) {
LOG((CLOG_ERR "failed to create window: %d", GetLastError()));
throw XScreenOpenFailure();
}
return window;
}
void
CMSWindowsScreen::destroyWindow(HWND hwnd) const
{
if (hwnd != NULL) {
DestroyWindow(hwnd);
}
}
void
CMSWindowsScreen::sendEvent(CEvent::Type type, void* data)
{
EVENTQUEUE->addEvent(CEvent(type, getEventTarget(), data));
}
void
CMSWindowsScreen::sendClipboardEvent(CEvent::Type type, ClipboardID id)
{
CClipboardInfo* info = (CClipboardInfo*)malloc(sizeof(CClipboardInfo));
info->m_id = id;
info->m_sequenceNumber = m_sequenceNumber;
sendEvent(type, info);
}
void
CMSWindowsScreen::handleSystemEvent(const CEvent& event, void*)
{
MSG* msg = reinterpret_cast<MSG*>(event.getData());
assert(msg != NULL);
if (CArchMiscWindows::processDialog(msg)) {
return;
}
if (onPreDispatch(msg->hwnd, msg->message, msg->wParam, msg->lParam)) {
return;
}
TranslateMessage(msg);
DispatchMessage(msg);
}
bool
CMSWindowsScreen::onPreDispatch(HWND hwnd,
UINT message, WPARAM wParam, LPARAM lParam)
{
// handle event
switch (message) {
case SYNERGY_MSG_SCREEN_SAVER:
return onScreensaver(wParam != 0);
}
if (m_isPrimary) {
return onPreDispatchPrimary(hwnd, message, wParam, lParam);
}
return false;
}
bool
CMSWindowsScreen::onPreDispatchPrimary(HWND,
UINT message, WPARAM wParam, LPARAM lParam)
{
// check if windows key is up but we think it's down. if so then
// synthesize a key release for it. we have to do this because
// if the user presses and releases a windows key without pressing
// any other key while it's down then windows will eat the key
// release. if we don't detect that and synthesize the release
// then the cclient won't take the usual windows key release action
// (which on windows is to show the start menu).
//
// we can use GetKeyState() to check the state of the windows keys
// because, event though the key release is not reported to us,
// the event is processed and the keyboard state updated by the
// system. since the key could go up at any time we'll check the
// state on every event. only check on windows 95 family since
// NT family reports the key release as usual. obviously we skip
// this if the event is for the windows key itself.
if (m_is95Family && message != SYNERGY_MSG_KEY) {
if (wParam != VK_LWIN) {
fixKey(VK_LWIN);
}
if (wParam != VK_RWIN) {
fixKey(VK_RWIN);
}
}
// handle event
switch (message) {
case SYNERGY_MSG_MARK:
return onMark(static_cast<UInt32>(wParam));
case SYNERGY_MSG_KEY:
return onKey(wParam, lParam);
case SYNERGY_MSG_MOUSE_BUTTON:
return onMouseButton(wParam, lParam);
case SYNERGY_MSG_MOUSE_MOVE:
return onMouseMove(static_cast<SInt32>(wParam),
static_cast<SInt32>(lParam));
case SYNERGY_MSG_MOUSE_WHEEL:
return onMouseWheel(static_cast<SInt32>(wParam));
case SYNERGY_MSG_PRE_WARP:
{
// save position to compute delta of next motion
m_xCursor = static_cast<SInt32>(wParam);
m_yCursor = static_cast<SInt32>(lParam);
// we warped the mouse. discard events until we find the
// matching post warp event. see warpCursorNoFlush() for
// where the events are sent. we discard the matching
// post warp event and can be sure we've skipped the warp
// event.
MSG msg;
do {
GetMessage(&msg, NULL, SYNERGY_MSG_MOUSE_MOVE,
SYNERGY_MSG_POST_WARP);
} while (msg.message != SYNERGY_MSG_POST_WARP);
}
return true;
case SYNERGY_MSG_POST_WARP:
LOG((CLOG_WARN "unmatched post warp"));
return true;
}
return false;
}
bool
CMSWindowsScreen::onEvent(HWND, UINT msg,
WPARAM wParam, LPARAM lParam, LRESULT* result)
{
switch (msg) {
case WM_QUERYENDSESSION:
if (m_is95Family) {
*result = TRUE;
return true;
}
break;
case WM_ENDSESSION:
if (m_is95Family) {
if (wParam == TRUE && lParam == 0) {
EVENTQUEUE->addEvent(CEvent(CEvent::kQuit));
}
return true;
}
break;
case WM_DRAWCLIPBOARD:
LOG((CLOG_DEBUG "clipboard was taken"));
// first pass on the message
if (m_nextClipboardWindow != NULL) {
SendMessage(m_nextClipboardWindow, msg, wParam, lParam);
}
// now handle the message
return onClipboardChange();
case WM_CHANGECBCHAIN:
if (m_nextClipboardWindow == (HWND)wParam) {
m_nextClipboardWindow = (HWND)lParam;
LOG((CLOG_DEBUG "clipboard chain: new next: 0x%08x", m_nextClipboardWindow));
}
else if (m_nextClipboardWindow != NULL) {
LOG((CLOG_DEBUG "clipboard chain: forward: %d 0x%08x 0x%08x", msg, wParam, lParam));
SendMessage(m_nextClipboardWindow, msg, wParam, lParam);
}
return true;
case WM_DISPLAYCHANGE:
return onDisplayChange();
case WM_POWERBROADCAST:
switch (wParam) {
case PBT_APMRESUMEAUTOMATIC:
case PBT_APMRESUMECRITICAL:
case PBT_APMRESUMESUSPEND:
if (m_resume != NULL) {
m_resume->run();
}
break;
case PBT_APMSUSPEND:
if (m_suspend != NULL) {
m_suspend->run();
}
break;
}
*result = TRUE;
return true;
}
return false;
}
bool
CMSWindowsScreen::onMark(UInt32 mark)
{
m_markReceived = mark;
return true;
}
bool
CMSWindowsScreen::onKey(WPARAM wParam, LPARAM lParam)
{
WPARAM charAndVirtKey = wParam;
wParam &= 0xffu;
// update key state. ignore key repeats.
if ((lParam & 0xc0000000u) == 0x00000000) {
KeyButton scancode = (KeyButton)((lParam & 0x01ff0000) >> 16);
m_keyState->setKeyDown(scancode, true);
}
else if ((lParam & 0xc0000000u) == 0xc0000000) {
KeyButton scancode = (KeyButton)((lParam & 0x01ff0000) >> 16);
m_keyState->setKeyDown(scancode, false);
}
// ignore message if posted prior to last mark change
if (!ignore()) {
// check for ctrl+alt+del emulation
if ((wParam == VK_PAUSE || wParam == VK_CANCEL) &&
(m_keyMapper.isPressed(VK_CONTROL) &&
m_keyMapper.isPressed(VK_MENU))) {
LOG((CLOG_DEBUG "emulate ctrl+alt+del"));
wParam = VK_DELETE;
lParam &= 0xfffe0000;
lParam |= m_keyMapper.virtualKeyToButton(wParam) << 16;
lParam |= 0x00000001;
charAndVirtKey = wParam;
}
// process key normally
bool altgr;
KeyModifierMask mask;
const KeyID key = m_keyMapper.mapKeyFromEvent(
charAndVirtKey, lParam, &mask, &altgr);
KeyButton button = static_cast<KeyButton>(
(lParam & 0x01ff0000u) >> 16);
if (key != kKeyNone && key != kKeyMultiKey) {
if ((lParam & 0x80000000) == 0) {
// key press
// if AltGr required for this key then make sure
// the ctrl and alt keys are *not* down on the
// client. windows simulates AltGr with ctrl and
// alt for some inexplicable reason and clients
// will get confused if they see mode switch and
// ctrl and alt. we'll also need to put ctrl and
// alt back the way they were after we simulate
// the key.
bool ctrlL = m_keyMapper.isPressed(VK_LCONTROL);
bool ctrlR = m_keyMapper.isPressed(VK_RCONTROL);
bool altL = m_keyMapper.isPressed(VK_LMENU);
bool altR = m_keyMapper.isPressed(VK_RMENU);
if (altgr) {
KeyID key;
KeyButton button;
KeyModifierMask mask2 = (mask &
~(KeyModifierControl |
KeyModifierAlt |
KeyModifierModeSwitch));
if (ctrlL) {
key = kKeyControl_L;
button = m_keyMapper.virtualKeyToButton(VK_LCONTROL);
LOG((CLOG_DEBUG1 "event: fake key release key=%d mask=0x%04x button=0x%04x", key, mask2, button));
sendEvent(getKeyUpEvent(),
CKeyInfo::alloc(key, mask2, button, 1));
}
if (ctrlR) {
key = kKeyControl_R;
button = m_keyMapper.virtualKeyToButton(VK_RCONTROL);
LOG((CLOG_DEBUG1 "event: fake key release key=%d mask=0x%04x button=0x%04x", key, mask2, button));
sendEvent(getKeyUpEvent(),
CKeyInfo::alloc(key, mask2, button, 1));
}
if (altL) {
key = kKeyAlt_L;
button = m_keyMapper.virtualKeyToButton(VK_LMENU);
LOG((CLOG_DEBUG1 "event: fake key release key=%d mask=0x%04x button=0x%04x", key, mask2, button));
sendEvent(getKeyUpEvent(),
CKeyInfo::alloc(key, mask2, button, 1));
}
if (altR) {
key = kKeyAlt_R;
button = m_keyMapper.virtualKeyToButton(VK_RMENU);
LOG((CLOG_DEBUG1 "event: fake key release key=%d mask=0x%04x button=0x%04x", key, mask2, button));
sendEvent(getKeyUpEvent(),
CKeyInfo::alloc(key, mask2, button, 1));
}
}
// send key
const bool wasDown = ((lParam & 0x40000000) != 0);
SInt32 repeat = (SInt32)(lParam & 0xffff);
if (!wasDown) {
LOG((CLOG_DEBUG1 "event: key press key=%d mask=0x%04x button=0x%04x", key, mask, button));
sendEvent(getKeyDownEvent(),
CKeyInfo::alloc(key, mask, button, 1));
if (repeat > 0) {
--repeat;
}
}
if (repeat >= 1) {
LOG((CLOG_DEBUG1 "event: key repeat key=%d mask=0x%04x count=%d button=0x%04x", key, mask, repeat, button));
sendEvent(getKeyRepeatEvent(),
CKeyInfo::alloc(key, mask, button, repeat));
}
// restore ctrl and alt state
if (altgr) {
KeyID key;
KeyButton button;
KeyModifierMask mask2 = (mask &
~(KeyModifierControl |
KeyModifierAlt |
KeyModifierModeSwitch));
if (ctrlL) {
key = kKeyControl_L;
button = m_keyMapper.virtualKeyToButton(VK_LCONTROL);
LOG((CLOG_DEBUG1 "event: fake key press key=%d mask=0x%04x button=0x%04x", key, mask2, button));
sendEvent(getKeyDownEvent(),
CKeyInfo::alloc(key, mask2, button, 1));
mask2 |= KeyModifierControl;
}
if (ctrlR) {
key = kKeyControl_R;
button = m_keyMapper.virtualKeyToButton(VK_RCONTROL);
LOG((CLOG_DEBUG1 "event: fake key press key=%d mask=0x%04x button=0x%04x", key, mask2, button));
sendEvent(getKeyDownEvent(),
CKeyInfo::alloc(key, mask2, button, 1));
mask2 |= KeyModifierControl;
}
if (altL) {
key = kKeyAlt_L;
button = m_keyMapper.virtualKeyToButton(VK_LMENU);
LOG((CLOG_DEBUG1 "event: fake key press key=%d mask=0x%04x button=0x%04x", key, mask2, button));
sendEvent(getKeyDownEvent(),
CKeyInfo::alloc(key, mask2, button, 1));
mask2 |= KeyModifierAlt;
}
if (altR) {
key = kKeyAlt_R;
button = m_keyMapper.virtualKeyToButton(VK_RMENU);
LOG((CLOG_DEBUG1 "event: fake key press key=%d mask=0x%04x button=0x%04x", key, mask2, button));
sendEvent(getKeyDownEvent(),
CKeyInfo::alloc(key, mask2, button, 1));
mask2 |= KeyModifierAlt;
}
}
}
else {
// key release. if the key isn't down according to
// our table then we never got the key press event
// for it. if it's not a modifier key then we'll
// synthesize the press first. only do this on
// the windows 95 family, which eats certain special
// keys like alt+tab, ctrl+esc, etc.
if (m_is95Family &&
!m_keyMapper.isModifier(wParam) &&
m_keyMapper.isPressed(wParam)) {
LOG((CLOG_DEBUG1 "event: fake key press key=%d mask=0x%04x button=0x%04x", key, mask, button));
sendEvent(getKeyDownEvent(),
CKeyInfo::alloc(key, mask, button, 1));
m_keyMapper.updateKey(lParam & 0x3fffffffu);
}
// do key up
LOG((CLOG_DEBUG1 "event: key release key=%d mask=0x%04x button=0x%04x", key, mask, button));
sendEvent(getKeyUpEvent(),
CKeyInfo::alloc(key, mask, button, 1));
}
}
else {
LOG((CLOG_DEBUG2 "event: cannot map key wParam=%d lParam=0x%08x", wParam, lParam));
}
}
// keep our shadow key state up to date
m_keyMapper.updateKey(lParam);
return true;
}
bool
CMSWindowsScreen::onMouseButton(WPARAM wParam, LPARAM lParam)
{
// get which button
bool pressed = false;
const ButtonID button = mapButtonFromEvent(wParam, lParam);
// ignore message if posted prior to last mark change
if (!ignore()) {
switch (wParam) {
case WM_LBUTTONDOWN:
case WM_MBUTTONDOWN:
case WM_RBUTTONDOWN:
case WM_XBUTTONDOWN:
case WM_LBUTTONDBLCLK:
case WM_MBUTTONDBLCLK:
case WM_RBUTTONDBLCLK:
case WM_XBUTTONDBLCLK:
case WM_NCLBUTTONDOWN:
case WM_NCMBUTTONDOWN:
case WM_NCRBUTTONDOWN:
case WM_NCXBUTTONDOWN:
case WM_NCLBUTTONDBLCLK:
case WM_NCMBUTTONDBLCLK:
case WM_NCRBUTTONDBLCLK:
case WM_NCXBUTTONDBLCLK:
LOG((CLOG_DEBUG1 "event: button press button=%d", button));
if (button != kButtonNone) {
sendEvent(getButtonDownEvent(), CButtonInfo::alloc(button));
}
pressed = true;
break;
case WM_LBUTTONUP:
case WM_MBUTTONUP:
case WM_RBUTTONUP:
case WM_XBUTTONUP:
case WM_NCLBUTTONUP:
case WM_NCMBUTTONUP:
case WM_NCRBUTTONUP:
case WM_NCXBUTTONUP:
LOG((CLOG_DEBUG1 "event: button release button=%d", button));
if (button != kButtonNone) {
sendEvent(getButtonUpEvent(), CButtonInfo::alloc(button));
}
pressed = false;
break;
}
}
// keep our shadow key state up to date
if (button >= kButtonLeft && button <= kButtonExtra0 + 1) {
if (pressed) {
m_buttons[button] |= 0x80;
}
else {
m_buttons[button] &= ~0x80;
}
}
return true;
}
bool
CMSWindowsScreen::onMouseMove(SInt32 mx, SInt32 my)
{
// compute motion delta (relative to the last known
// mouse position)
SInt32 x = mx - m_xCursor;
SInt32 y = my - m_yCursor;
// ignore if the mouse didn't move or if message posted prior
// to last mark change.
if (ignore() || (x == 0 && y == 0)) {
return true;
}
// save position to compute delta of next motion
m_xCursor = mx;
m_yCursor = my;
if (m_isOnScreen) {
// motion on primary screen
sendEvent(getMotionOnPrimaryEvent(),
CMotionInfo::alloc(m_xCursor, m_yCursor));
}
else {
// motion on secondary screen. warp mouse back to
// center.
warpCursorNoFlush(m_xCenter, m_yCenter);
// examine the motion. if it's about the distance
// from the center of the screen to an edge then
// it's probably a bogus motion that we want to
// ignore (see warpCursorNoFlush() for a further
// description).
static SInt32 bogusZoneSize = 10;
if (-x + bogusZoneSize > m_xCenter - m_x ||
x + bogusZoneSize > m_x + m_w - m_xCenter ||
-y + bogusZoneSize > m_yCenter - m_y ||
y + bogusZoneSize > m_y + m_h - m_yCenter) {
LOG((CLOG_DEBUG "dropped bogus motion %+d,%+d", x, y));
}
else {
// send motion
sendEvent(getMotionOnSecondaryEvent(), CMotionInfo::alloc(x, y));
}
}
return true;
}
bool
CMSWindowsScreen::onMouseWheel(SInt32 delta)
{
// ignore message if posted prior to last mark change
if (!ignore()) {
LOG((CLOG_DEBUG1 "event: button wheel delta=%d", delta));
sendEvent(getWheelEvent(), CWheelInfo::alloc(delta));
}
return true;
}
bool
CMSWindowsScreen::onScreensaver(bool activated)
{
// ignore this message if there are any other screen saver
// messages already in the queue. this is important because
// our checkStarted() function has a deliberate delay, so it
// can't respond to events at full CPU speed and will fall
// behind if a lot of screen saver events are generated.
// that can easily happen because windows will continually
// send SC_SCREENSAVE until the screen saver starts, even if
// the screen saver is disabled!
MSG msg;
if (PeekMessage(&msg, NULL, SYNERGY_MSG_SCREEN_SAVER,
SYNERGY_MSG_SCREEN_SAVER, PM_NOREMOVE)) {
return true;
}
if (activated) {
if (m_screensaver->checkStarted(SYNERGY_MSG_SCREEN_SAVER, FALSE, 0)) {
sendEvent(getScreensaverActivatedEvent());
// enable display power down
CArchMiscWindows::removeBusyState(CArchMiscWindows::kDISPLAY);
}
}
else {
sendEvent(getScreensaverDeactivatedEvent());
// disable display power down
CArchMiscWindows::addBusyState(CArchMiscWindows::kDISPLAY);
}
return true;
}
bool
CMSWindowsScreen::onDisplayChange()
{
// screen resolution may have changed. save old shape.
SInt32 xOld = m_x, yOld = m_y, wOld = m_w, hOld = m_h;
// update shape
updateScreenShape();
// do nothing if resolution hasn't changed
if (xOld != m_x || yOld != m_y || wOld != m_w || hOld != m_h) {
if (m_isPrimary) {
// warp mouse to center if off screen
if (!m_isOnScreen) {
warpCursor(m_xCenter, m_yCenter);
}
// tell hook about resize if on screen
else {
m_setZone(m_x, m_y, m_w, m_h, getJumpZoneSize());
}
}
// send new screen info
sendEvent(getShapeChangedEvent());
}
return true;
}
bool
CMSWindowsScreen::onClipboardChange()
{
// now notify client that somebody changed the clipboard (unless
// we're the owner).
if (!CMSWindowsClipboard::isOwnedBySynergy()) {
LOG((CLOG_DEBUG "clipboard changed: foreign owned"));
if (m_ownClipboard) {
LOG((CLOG_DEBUG "clipboard changed: lost ownership"));
m_ownClipboard = false;
sendClipboardEvent(getClipboardGrabbedEvent(), kClipboardClipboard);
sendClipboardEvent(getClipboardGrabbedEvent(), kClipboardSelection);
}
}
else {
LOG((CLOG_DEBUG "clipboard changed: synergy owned"));
m_ownClipboard = true;
}
return true;
}
void
CMSWindowsScreen::warpCursorNoFlush(SInt32 x, SInt32 y)
{
// send an event that we can recognize before the mouse warp
PostThreadMessage(GetCurrentThreadId(), SYNERGY_MSG_PRE_WARP, x, y);
// warp mouse. hopefully this inserts a mouse motion event
// between the previous message and the following message.
SetCursorPos(x, y);
// yield the CPU. there's a race condition when warping:
// a hardware mouse event occurs
// the mouse hook is not called because that process doesn't have the CPU
// we send PRE_WARP, SetCursorPos(), send POST_WARP
// we process all of those events and update m_x, m_y
// we finish our time slice
// the hook is called
// the hook sends us a mouse event from the pre-warp position
// we get the CPU
// we compute a bogus warp
// we need the hook to process all mouse events that occur
// before we warp before we do the warp but i'm not sure how
// to guarantee that. yielding the CPU here may reduce the
// chance of undesired behavior. we'll also check for very
// large motions that look suspiciously like about half width
// or height of the screen.
ARCH->sleep(0.0);
// send an event that we can recognize after the mouse warp
PostThreadMessage(GetCurrentThreadId(), SYNERGY_MSG_POST_WARP, 0, 0);
}
void
CMSWindowsScreen::nextMark()
{
// next mark
++m_mark;
// mark point in message queue where the mark was changed
PostThreadMessage(GetCurrentThreadId(), SYNERGY_MSG_MARK, m_mark, 0);
}
bool
CMSWindowsScreen::ignore() const
{
return (m_mark != m_markReceived);
}
void
CMSWindowsScreen::updateScreenShape()
{
// get shape
m_x = GetSystemMetrics(SM_XVIRTUALSCREEN);
m_y = GetSystemMetrics(SM_YVIRTUALSCREEN);
m_w = GetSystemMetrics(SM_CXVIRTUALSCREEN);
m_h = GetSystemMetrics(SM_CYVIRTUALSCREEN);
// get center for cursor
m_xCenter = GetSystemMetrics(SM_CXSCREEN) >> 1;
m_yCenter = GetSystemMetrics(SM_CYSCREEN) >> 1;
// check for multiple monitors
m_multimon = (m_w != GetSystemMetrics(SM_CXSCREEN) ||
m_h != GetSystemMetrics(SM_CYSCREEN));
LOG((CLOG_DEBUG "screen shape: %d,%d %dx%d %s", m_x, m_y, m_w, m_h, m_multimon ? "(multi-monitor)" : ""));
}
void
CMSWindowsScreen::enableSpecialKeys(bool enable) const
{
// enable/disable ctrl+alt+del, alt+tab, etc on win95 family.
// since the win95 family doesn't support low-level hooks, we
// use this undocumented feature to suppress normal handling
// of certain key combinations.
if (m_is95Family) {
DWORD dummy = 0;
SystemParametersInfo(SPI_SETSCREENSAVERRUNNING,
enable ? FALSE : TRUE, &dummy, 0);
}
}
void
CMSWindowsScreen::fixKey(UINT virtualKey)
{
if (m_keyMapper.isPressed(virtualKey) &&
(GetAsyncKeyState(virtualKey) & 0x8000) == 0) {
// compute appropriate parameters for fake event
KeyButton button = m_keyMapper.virtualKeyToButton(virtualKey);
LPARAM lParam = 0xc0000000 | ((LPARAM)button << 16);
// process as if it were a key up
KeyModifierMask mask;
KeyID key = m_keyMapper.mapKeyFromEvent(virtualKey,
lParam, &mask, NULL);
LOG((CLOG_DEBUG1 "event: fake key release key=%d mask=0x%04x button=0x%04x", key, mask, button));
sendEvent(getKeyUpEvent(), CKeyInfo::alloc(key, mask, button, 1));
m_keyMapper.updateKey(lParam);
}
}
DWORD
CMSWindowsScreen::mapButtonToEvent(ButtonID button,
bool press, DWORD* inData) const
{
DWORD dummy;
DWORD* data = (inData != NULL) ? inData : &dummy;
// 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
*data = 0;
switch (button) {
case kButtonLeft:
return press ? MOUSEEVENTF_LEFTDOWN : MOUSEEVENTF_LEFTUP;
case kButtonMiddle:
return press ? MOUSEEVENTF_MIDDLEDOWN : MOUSEEVENTF_MIDDLEUP;
case kButtonRight:
return press ? MOUSEEVENTF_RIGHTDOWN : MOUSEEVENTF_RIGHTUP;
case kButtonExtra0 + 0:
*data = XBUTTON1;
return press ? MOUSEEVENTF_XDOWN : MOUSEEVENTF_XUP;
case kButtonExtra0 + 1:
*data = XBUTTON2;
return press ? MOUSEEVENTF_XDOWN : MOUSEEVENTF_XUP;
default:
return 0;
}
}
ButtonID
CMSWindowsScreen::mapButtonFromEvent(WPARAM msg, LPARAM button) const
{
switch (msg) {
case WM_LBUTTONDOWN:
case WM_LBUTTONDBLCLK:
case WM_LBUTTONUP:
case WM_NCLBUTTONDOWN:
case WM_NCLBUTTONDBLCLK:
case WM_NCLBUTTONUP:
return kButtonLeft;
case WM_MBUTTONDOWN:
case WM_MBUTTONDBLCLK:
case WM_MBUTTONUP:
case WM_NCMBUTTONDOWN:
case WM_NCMBUTTONDBLCLK:
case WM_NCMBUTTONUP:
return kButtonMiddle;
case WM_RBUTTONDOWN:
case WM_RBUTTONDBLCLK:
case WM_RBUTTONUP:
case WM_NCRBUTTONDOWN:
case WM_NCRBUTTONDBLCLK:
case WM_NCRBUTTONUP:
return kButtonRight;
case WM_XBUTTONDOWN:
case WM_XBUTTONDBLCLK:
case WM_XBUTTONUP:
case WM_NCXBUTTONDOWN:
case WM_NCXBUTTONDBLCLK:
case WM_NCXBUTTONUP:
switch (button) {
case XBUTTON1:
return kButtonExtra0 + 0;
case XBUTTON2:
return kButtonExtra0 + 1;
}
return kButtonNone;
default:
return kButtonNone;
}
}
void
CMSWindowsScreen::ctrlAltDelThread(void*)
{
// get the Winlogon desktop at whatever privilege we can
HDESK desk = OpenDesktop("Winlogon", 0, FALSE, MAXIMUM_ALLOWED);
if (desk != NULL) {
if (SetThreadDesktop(desk)) {
PostMessage(HWND_BROADCAST, WM_HOTKEY, 0,
MAKELPARAM(MOD_CONTROL | MOD_ALT, VK_DELETE));
}
else {
LOG((CLOG_DEBUG "can't switch to Winlogon desk: %d", GetLastError()));
}
CloseDesktop(desk);
}
else {
LOG((CLOG_DEBUG "can't open Winlogon desk: %d", GetLastError()));
}
}
LRESULT CALLBACK
CMSWindowsScreen::wndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
assert(s_screen != NULL);
LRESULT result = 0;
if (!s_screen->onEvent(hwnd, msg, wParam, lParam, &result)) {
result = DefWindowProc(hwnd, msg, wParam, lParam);
}
return result;
}
LRESULT CALLBACK
CMSWindowsScreen::primaryDeskProc(
HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
return DefWindowProc(hwnd, msg, wParam, lParam);
}
LRESULT CALLBACK
CMSWindowsScreen::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
CMSWindowsScreen::deskMouseMove(SInt32 x, SInt32 y) const
{
// motion is simple (i.e. it's on the primary monitor) if there
// is only one monitor.
bool simple = !m_multimon;
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?) is 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. 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.
else {
// 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
POINT pos;
GetCursorPos(&pos);
mouse_event(MOUSEEVENTF_MOVE, x - pos.x, y - pos.y, 0, 0);
// restore mouse speed & acceleration
if (accelChanged) {
SystemParametersInfo(SPI_SETMOUSE, 0, oldSpeed, 0);
SystemParametersInfo(SPI_SETMOUSESPEED, 0, oldSpeed + 3, 0);
}
}
}
void
CMSWindowsScreen::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);
}
void
CMSWindowsScreen::deskLeave(CDesk* desk, HKL keyLayout)
{
ShowCursor(FALSE);
if (m_isPrimary) {
// 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);
// 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
CMSWindowsScreen::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()));
}
// a window on the primary screen should never activate
if (m_isPrimary && desk->m_window != NULL) {
EnableWindow(desk->m_window, FALSE);
}
}
// 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;
}
}
break;
case SYNERGY_MSG_ENTER:
deskEnter(desk);
break;
case SYNERGY_MSG_LEAVE:
deskLeave(desk, (HKL)msg.wParam);
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_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_keyMapper.update(m_keyState);
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) {
CMSWindowsDesktop::closeDesktop(desk->m_desk);
}
}
CMSWindowsScreen::CDesk*
CMSWindowsScreen::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<CMSWindowsScreen>(
this, &CMSWindowsScreen::deskThread, desk));
waitForDesk();
m_desks.insert(std::make_pair(name, desk));
return desk;
}
void
CMSWindowsScreen::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
CMSWindowsScreen::checkDesk()
{
// get current desktop. if we already know about it then return.
CDesk* desk;
HDESK hdesk = CMSWindowsDesktop::openInputDesktop();
CString name = CMSWindowsDesktop::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 {
CMSWindowsDesktop::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
if (!m_isOnScreen) {
sendDeskMessage(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"));
updateKeys();
}
else {
LOG((CLOG_DEBUG "desktop is now inaccessible"));
}
}
// switch desk
m_activeDesk = desk;
m_activeDeskName = name;
sendDeskMessage(SYNERGY_MSG_SWITCH, 0, 0);
// hide cursor on new desk
if (!m_isOnScreen) {
sendDeskMessage(SYNERGY_MSG_LEAVE, (WPARAM)m_keyLayout, 0);
}
}
}
bool
CMSWindowsScreen::isDeskAccessible(const CDesk* desk) const
{
return (desk != NULL && desk->m_desk != NULL);
}
void
CMSWindowsScreen::sendDeskMessage(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
CMSWindowsScreen::waitForDesk() const
{
CMSWindowsScreen* self = const_cast<CMSWindowsScreen*>(this);
CLock lock(&m_mutex);
while (!(bool)m_deskReady) {
m_deskReady.wait();
}
self->m_deskReady = false;
}
void
CMSWindowsScreen::handleCheckDesk(const CEvent&, void*)
{
checkDesk();
}
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