KeyModifierMask
CMSWindowsKeyState::pollActiveModifiers() const
{
KeyModifierMask state = 0;
// get non-toggle modifiers from our own shadow key state
for (size_t i = 0; i < sizeof(s_modifiers) / sizeof(s_modifiers[0]); ++i) {
KeyButton button = virtualKeyToButton(s_modifiers[i].m_vk);
if (button != 0 && isKeyDown(button)) {
state |= s_modifiers[i].m_mask;
}
}
// we can get toggle modifiers from the system
if ((GetKeyState(VK_CAPITAL) & 0x01) != 0) {
state |= KeyModifierCapsLock;
}
if ((GetKeyState(VK_NUMLOCK) & 0x01) != 0) {
state |= KeyModifierNumLock;
}
if ((GetKeyState(VK_SCROLL) & 0x01) != 0) {
state |= KeyModifierScrollLock;
}
return state;
}
bool
CMSWindowsKeyState::fakeCtrlAltDel()
{
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.
HANDLE hEvtSendSas = OpenEvent( EVENT_MODIFY_STATE, FALSE, "Global\\SendSAS" );
if ( hEvtSendSas ) {
LOG((CLOG_DEBUG "found the SendSAS event - signaling my launcher to simulate ctrl+alt+del"));
SetEvent( hEvtSendSas );
CloseHandle( hEvtSendSas );
}
else {
CThread cad(new CFunctionJob(&CMSWindowsKeyState::ctrlAltDelThread));
cad.wait();
}
}
else {
// simulate ctrl+alt+del
fakeKeyDown(kKeyDelete, KeyModifierControl | KeyModifierAlt,
virtualKeyToButton(VK_DELETE));
}
return true;
}
void
MSWindowsKeyState::pollPressedKeys(KeyButtonSet& pressedKeys) const
{
BYTE keyState[256];
if (!GetKeyboardState(keyState)) {
LOG((CLOG_ERR "GetKeyboardState returned false on pollPressedKeys"));
return;
}
for (KeyButton i = 1; i < 256; ++i) {
if ((keyState[i] & 0x80) != 0) {
KeyButton keyButton = virtualKeyToButton(i);
if (keyButton != 0) {
pressedKeys.insert(keyButton);
}
}
}
}
bool
CMSWindowsKeyState::fakeCtrlAltDel()
{
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(&CMSWindowsKeyState::ctrlAltDelThread));
cad.wait();
}
else {
// simulate ctrl+alt+del
fakeKeyDown(kKeyDelete, KeyModifierControl | KeyModifierAlt,
virtualKeyToButton(VK_DELETE));
}
return true;
}
void
CMSWindowsKeyState::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) {
return;
}
KeyButton leftButton = virtualKeyToButton(VK_LWIN);
KeyButton rightButton = virtualKeyToButton(VK_RWIN);
bool leftDown = isKeyDown(leftButton);
bool rightDown = isKeyDown(rightButton);
bool fix = (leftDown || rightDown);
if (fix) {
// check if either button is not really down
bool leftAsyncDown = ((GetAsyncKeyState(VK_LWIN) & 0x8000) != 0);
bool rightAsyncDown = ((GetAsyncKeyState(VK_RWIN) & 0x8000) != 0);
if (leftAsyncDown != leftDown || rightAsyncDown != rightDown) {
KeyModifierMask state = getActiveModifiers();
if (!leftAsyncDown && !rightAsyncDown) {
// no win keys are down so remove super modifier
state &= ~KeyModifierSuper;
}
// report up events
if (leftDown && !leftAsyncDown) {
LOG((CLOG_DEBUG1 "event: fake key release left windows key (0x%03x)", leftButton));
CKeyState::onKey(leftButton, false, state);
CKeyState::sendKeyEvent(m_eventTarget, false, false,
kKeySuper_L, state, 1, leftButton);
}
if (rightDown && !rightAsyncDown) {
LOG((CLOG_DEBUG1 "event: fake key release right windows key (0x%03x)", rightButton));
CKeyState::onKey(rightButton, false, state);
CKeyState::sendKeyEvent(m_eventTarget, false, false,
kKeySuper_R, state, 1, rightButton);
}
}
}
if (fix && m_fixTimer == NULL) {
// schedule check
m_fixTimer = EVENTQUEUE->newTimer(0.1, NULL);
EVENTQUEUE->adoptHandler(CEvent::kTimer, m_fixTimer,
new TMethodEventJob<CMSWindowsKeyState>(
this, &CMSWindowsKeyState::handleFixKeys));
}
else if (!fix && m_fixTimer != NULL) {
// remove scheduled check
EVENTQUEUE->removeHandler(CEvent::kTimer, m_fixTimer);
EVENTQUEUE->deleteTimer(m_fixTimer);
m_fixTimer = NULL;
}
}