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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 "CMSWindowsDesks.h"
#include "CMSWindowsEventQueueBuffer.h"
#include "CMSWindowsKeyState.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 <string.h>
#include <pbt.h>
//
// add backwards compatible multihead support (and suppress bogus warning).
// this isn't supported on MinGW yet AFAICT.
//
#if defined(_MSC_VER)
#pragma warning(push)
#pragma warning(disable: 4706) // assignment within conditional
#define COMPILE_MULTIMON_STUBS
#include <multimon.h>
#pragma warning(pop)
#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
// WM_POWERBROADCAST stuff
#if !defined(PBT_APMRESUMEAUTOMATIC)
#define PBT_APMRESUMEAUTOMATIC 0x0012
#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_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_fixTimer(NULL),
m_screensaver(NULL),
m_screensaverNotify(false),
m_window(NULL),
m_nextClipboardWindow(NULL),
m_ownClipboard(false),
m_desks(NULL),
m_hookLibrary(NULL),
m_init(NULL),
m_cleanup(NULL),
m_setSides(NULL),
m_setZone(NULL),
m_setMode(NULL),
m_keyState(NULL),
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_screensaver = new CMSWindowsScreenSaver();
m_desks = new CMSWindowsDesks(m_isPrimary,
m_hookLibrary, m_screensaver,
new TMethodJob<CMSWindowsScreen>(this,
&CMSWindowsScreen::updateKeysCB));
m_keyState = new CMSWindowsKeyState(m_desks);
updateScreenShape();
m_class = createWindowClass();
m_window = createWindow(m_class, "Synergy");
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_keyState;
delete m_desks;
delete m_screensaver;
destroyWindow(m_window);
destroyClass(m_class);
closeHookLibrary(m_hookLibrary);
delete m_suspend;
delete m_resume;
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_keyState;
delete m_desks;
delete m_screensaver;
destroyWindow(m_window);
destroyClass(m_class);
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::enable()
{
assert(m_isOnScreen == m_isPrimary);
// install our clipboard snooper
m_nextClipboardWindow = SetClipboardViewer(m_window);
// track the active desk and (re)install the hooks
m_desks->enable();
if (m_isPrimary) {
// 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);
}
}
void
CMSWindowsScreen::disable()
{
// stop tracking the active desk
m_desks->disable();
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);
}
// uninstall fix key timer
if (m_fixTimer != NULL) {
EVENTQUEUE->removeHandler(CEvent::kTimer, m_fixTimer);
EVENTQUEUE->deleteTimer(m_fixTimer);
m_fixTimer = NULL;
}
// stop snooping the clipboard
ChangeClipboardChain(m_window, m_nextClipboardWindow);
m_nextClipboardWindow = NULL;
m_isOnScreen = m_isPrimary;
}
void
CMSWindowsScreen::enter()
{
m_desks->enter();
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_keyState->setKeyLayout(m_keyLayout);
// tell desk that we're leaving and tell it the keyboard layout
m_desks->leave(m_keyLayout);
if (m_isPrimary) {
// 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_desks->installScreensaverHooks(true);
}
else {
m_screensaver->disable();
}
}
void
CMSWindowsScreen::closeScreensaver()
{
if (m_screensaver != NULL) {
if (m_screensaverNotify) {
m_desks->installScreensaverHooks(false);
}
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::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
{
m_desks->getCursorPos(x, 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[] = {
"<invalid>",
"Left Button",
"Middle Button",
"Right Button",
"X Button 1",
"X Button 2"
};
for (UInt32 i = 1; i < sizeof(m_buttons) / sizeof(m_buttons[0]); ++i) {
if (m_buttons[i]) {
LOG((CLOG_DEBUG "locked by \"%s\"", buttonToName[i]));
return true;
}
}
return false;
}
void
CMSWindowsScreen::getCursorCenter(SInt32& x, SInt32& y) const
{
x = m_xCenter;
y = m_yCenter;
}
void
CMSWindowsScreen::fakeMouseButton(ButtonID id, bool press) const
{
m_desks->fakeMouseButton(id, press);
}
void
CMSWindowsScreen::fakeMouseMove(SInt32 x, SInt32 y) const
{
m_desks->fakeMouseMove(x, y);
}
void
CMSWindowsScreen::fakeMouseRelativeMove(SInt32 dx, SInt32 dy) const
{
m_desks->fakeMouseRelativeMove(dx, dy);
}
void
CMSWindowsScreen::fakeMouseWheel(SInt32 delta) const
{
m_desks->fakeMouseWheel(delta);
}
void
CMSWindowsScreen::updateKeys()
{
m_desks->updateKeys();
}
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_init = (InitFunc)GetProcAddress(hookLibrary, "init");
m_cleanup = (CleanupFunc)GetProcAddress(hookLibrary, "cleanup");
if (m_setSides == NULL ||
m_setZone == NULL ||
m_setMode == NULL ||
m_init == NULL ||
m_cleanup == 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);
}
void
CMSWindowsScreen::destroyClass(ATOM windowClass) const
{
if (windowClass != 0) {
UnregisterClass(reinterpret_cast<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,
reinterpret_cast<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);
}
void
CMSWindowsScreen::updateButtons()
{
m_buttons[kButtonNone] = false;
m_buttons[kButtonLeft] = (GetKeyState(VK_LBUTTON) < 0);
m_buttons[kButtonMiddle] = (GetKeyState(VK_MBUTTON) < 0);
m_buttons[kButtonRight] = (GetKeyState(VK_RBUTTON) < 0);
m_buttons[kButtonExtra0 + 0] = (GetKeyState(VK_XBUTTON1) < 0);
m_buttons[kButtonExtra0 + 1] = (GetKeyState(VK_XBUTTON2) < 0);
}
IKeyState*
CMSWindowsScreen::getKeyState() const
{
return m_keyState;
}
bool
CMSWindowsScreen::onPreDispatch(HWND hwnd,
UINT message, WPARAM wParam, LPARAM lParam)
{
// handle event
switch (message) {
case SYNERGY_MSG_SCREEN_SAVER:
return onScreensaver(wParam != 0);
case SYNERGY_MSG_DEBUG:
LOG((CLOG_DEBUG1 "hook: 0x%08x 0x%08x", wParam, lParam));
return true;
}
if (m_isPrimary) {
return onPreDispatchPrimary(hwnd, message, wParam, lParam);
}
return false;
}
bool
CMSWindowsScreen::onPreDispatchPrimary(HWND,
UINT message, WPARAM wParam, LPARAM lParam)
{
// 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)
{
LOG((CLOG_DEBUG1 "event: Key char=%d, vk=0x%02x, lParam=0x%08x", (wParam & 0xff00u) >> 8, wParam & 0xffu, lParam));
// fix up key state
fixKeys();
// get key info
KeyButton button = (KeyButton)((lParam & 0x01ff0000) >> 16);
bool down = ((lParam & 0xc0000000u) == 0x00000000u);
bool up = ((lParam & 0x80000000u) == 0x80000000u);
bool wasDown = isKeyDown(button);
// the windows keys are a royal pain on the windows 95 family.
// the system eats the key up events if and only if the windows
// key wasn't combined with another key, i.e. it was tapped.
// fixKeys() and scheduleFixKeys() are all about synthesizing
// the missing key up. but even windows itself gets a little
// confused and sets bit 30 in lParam if you tap the windows
// key twice. that bit means the key was previously down and
// that makes some sense since the up event was missing.
// anyway, on the windows 95 family we forget about windows
// key repeats and treat anything that's not a key down as a
// key up.
if (m_is95Family &&
((wParam & 0xffu) == VK_LWIN || (wParam & 0xffu) == VK_RWIN)) {
down = !up;
}
// update key state. ignore key repeats.
if (down) {
m_keyState->setKeyDown(button, true);
}
else if (up) {
m_keyState->setKeyDown(button, false);
}
// schedule a timer if we need to fix keys later
scheduleFixKeys();
// special case: we detect ctrl+alt+del being pressed on some
// systems but we don't detect the release of those keys. so
// if ctrl, alt, and del are down then mark them up.
KeyModifierMask mask = getActiveModifiers();
bool ctrlAlt = ((mask & (KeyModifierControl | KeyModifierAlt)) ==
(KeyModifierControl | KeyModifierAlt));
if (down && ctrlAlt &&
isKeyDown(m_keyState->virtualKeyToButton(VK_DELETE))) {
m_keyState->setKeyDown(
m_keyState->virtualKeyToButton(VK_LCONTROL), false);
m_keyState->setKeyDown(
m_keyState->virtualKeyToButton(VK_RCONTROL), false);
m_keyState->setKeyDown(
m_keyState->virtualKeyToButton(VK_LMENU), false);
m_keyState->setKeyDown(
m_keyState->virtualKeyToButton(VK_RMENU), false);
m_keyState->setKeyDown(
m_keyState->virtualKeyToButton(VK_DELETE), false);
}
// ignore message if posted prior to last mark change
if (!ignore()) {
// check for ctrl+alt+del emulation
UINT virtKey = (wParam & 0xffu);
if ((virtKey == VK_PAUSE || virtKey == VK_CANCEL) && ctrlAlt) {
LOG((CLOG_DEBUG "emulate ctrl+alt+del"));
// switch wParam and lParam to be as if VK_DELETE was
// pressed or released
wParam = VK_DELETE;
lParam &= 0xfe000000;
lParam |= m_keyState->virtualKeyToButton(wParam) << 16;
lParam |= 0x00000001;
}
// process key
KeyModifierMask mask;
KeyID key = m_keyState->mapKeyFromEvent(wParam, lParam, &mask);
button = static_cast<KeyButton>((lParam & 0x01ff0000u) >> 16);
if (key != kKeyNone) {
// fix up key. 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 && !wasDown && up) {
switch (virtKey) {
case VK_LSHIFT:
case VK_RSHIFT:
case VK_SHIFT:
case VK_LCONTROL:
case VK_RCONTROL:
case VK_CONTROL:
case VK_LMENU:
case VK_RMENU:
case VK_MENU:
case VK_CAPITAL:
case VK_NUMLOCK:
case VK_SCROLL:
case VK_LWIN:
case VK_RWIN:
break;
default:
m_keyState->sendKeyEvent(getEventTarget(),
true, false, key, mask, 1, button);
break;
}
}
// do it
m_keyState->sendKeyEvent(getEventTarget(),
((lParam & 0x80000000u) == 0),
((lParam & 0x40000000u) == 1),
key, mask, (SInt32)(lParam & 0xffff), button);
}
else {
LOG((CLOG_DEBUG2 "event: cannot map key"));
}
}
return true;
}
bool
CMSWindowsScreen::onMouseButton(WPARAM wParam, LPARAM lParam)
{
// get which button
bool pressed = mapPressFromEvent(wParam, lParam);
ButtonID button = mapButtonFromEvent(wParam, lParam);
// keep our shadow key state up to date
if (button >= kButtonLeft && button <= kButtonExtra0 + 1) {
if (pressed) {
m_buttons[button] = true;
}
else {
m_buttons[button] = false;
}
}
// ignore message if posted prior to last mark change
if (!ignore()) {
if (pressed) {
LOG((CLOG_DEBUG1 "event: button press button=%d", button));
if (button != kButtonNone) {
sendEvent(getButtonDownEvent(), CButtonInfo::alloc(button));
}
}
else {
LOG((CLOG_DEBUG1 "event: button release button=%d", button));
if (button != kButtonNone) {
sendEvent(getButtonUpEvent(), CButtonInfo::alloc(button));
}
}
}
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)" : ""));
// tell the desks
m_desks->setShape(m_x, m_y, m_w, m_h, m_xCenter, m_yCenter, m_multimon);
}
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);
}
}
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;
}
}
bool
CMSWindowsScreen::mapPressFromEvent(WPARAM msg, LPARAM) const
{
switch (msg) {
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:
return true;
case WM_LBUTTONUP:
case WM_MBUTTONUP:
case WM_RBUTTONUP:
case WM_XBUTTONUP:
case WM_NCLBUTTONUP:
case WM_NCMBUTTONUP:
case WM_NCRBUTTONUP:
case WM_NCXBUTTONUP:
return false;
default:
return false;
}
}
void
CMSWindowsScreen::fixKeys()
{
// fake key releases for the windows keys if we think they're
// down but they're really up. 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 the system will eat the key
// release. if we don't detect that and synthesize the release
// then the client won't take the usual windows key release action
// (which on windows is to show the start menu).
//
// only check on the windows 95 family since the NT family reports
// the key releases as usual.
if (m_is95Family) {
m_keyState->fixKey(getEventTarget(), VK_LWIN);
m_keyState->fixKey(getEventTarget(), VK_RWIN);
// check if we need the fix timer anymore
scheduleFixKeys();
}
}
void
CMSWindowsScreen::scheduleFixKeys()
{
if (m_is95Family) {
// see if any keys that need fixing are down
bool fix =
(m_keyState->isKeyDown(m_keyState->virtualKeyToButton(VK_LWIN)) ||
m_keyState->isKeyDown(m_keyState->virtualKeyToButton(VK_RWIN)));
// start or stop fix timer
if (fix && m_fixTimer == NULL) {
m_fixTimer = EVENTQUEUE->newTimer(0.1, NULL);
EVENTQUEUE->adoptHandler(CEvent::kTimer, m_fixTimer,
new TMethodEventJob<CMSWindowsScreen>(
this, &CMSWindowsScreen::handleFixKeys));
}
else if (!fix && m_fixTimer != NULL) {
EVENTQUEUE->removeHandler(CEvent::kTimer, m_fixTimer);
EVENTQUEUE->deleteTimer(m_fixTimer);
m_fixTimer = NULL;
}
}
}
void
CMSWindowsScreen::handleFixKeys(const CEvent&, void*)
{
fixKeys();
}
void
CMSWindowsScreen::updateKeysCB(void*)
{
m_keyState->updateKeys();
updateButtons();
}
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;
}
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