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barrier/lib/client/CMSWindowsSecondaryScreen.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 "CMSWindowsSecondaryScreen.h"
#include "CMSWindowsScreen.h"
#include "CPlatform.h"
#include "XScreen.h"
#include "CLock.h"
#include "CLog.h"
#include <cctype>
// 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
//
// CMSWindowsSecondaryScreen
//
CMSWindowsSecondaryScreen::CMSWindowsSecondaryScreen(
IScreenReceiver* receiver) :
m_is95Family(CPlatform::isWindows95Family()),
m_window(NULL),
m_mask(0)
{
m_screen = new CMSWindowsScreen(receiver, this);
}
CMSWindowsSecondaryScreen::~CMSWindowsSecondaryScreen()
{
assert(m_window == NULL);
delete m_screen;
}
void
CMSWindowsSecondaryScreen::keyDown(KeyID key, KeyModifierMask mask)
{
Keystrokes keys;
UINT virtualKey;
CLock lock(&m_mutex);
m_screen->syncDesktop();
// get the sequence of keys to simulate key press and the final
// modifier state.
m_mask = mapKey(keys, virtualKey, key, mask, kPress);
if (keys.empty()) {
return;
}
// generate key events
doKeystrokes(keys, 1);
// note that key is now down
m_keys[virtualKey] |= 0x80;
switch (virtualKey) {
case VK_LSHIFT:
case VK_RSHIFT:
m_keys[VK_SHIFT] |= 0x80;
break;
case VK_LCONTROL:
case VK_RCONTROL:
m_keys[VK_CONTROL] |= 0x80;
break;
case VK_LMENU:
case VK_RMENU:
m_keys[VK_MENU] |= 0x80;
break;
}
}
void
CMSWindowsSecondaryScreen::keyRepeat(KeyID key,
KeyModifierMask mask, SInt32 count)
{
Keystrokes keys;
UINT virtualKey;
CLock lock(&m_mutex);
m_screen->syncDesktop();
// get the sequence of keys to simulate key repeat and the final
// modifier state.
m_mask = mapKey(keys, virtualKey, key, mask, kRepeat);
if (keys.empty()) {
return;
}
// generate key events
doKeystrokes(keys, count);
}
void
CMSWindowsSecondaryScreen::keyUp(KeyID key, KeyModifierMask mask)
{
Keystrokes keys;
UINT virtualKey;
CLock lock(&m_mutex);
m_screen->syncDesktop();
// get the sequence of keys to simulate key release and the final
// modifier state.
m_mask = mapKey(keys, virtualKey, key, mask, kRelease);
if (keys.empty()) {
return;
}
// generate key events
doKeystrokes(keys, 1);
// note that key is now up
m_keys[virtualKey] &= ~0x80;
switch (virtualKey) {
case VK_LSHIFT:
if ((m_keys[VK_RSHIFT] & 0x80) == 0) {
m_keys[VK_SHIFT] &= ~0x80;
}
break;
case VK_RSHIFT:
if ((m_keys[VK_LSHIFT] & 0x80) == 0) {
m_keys[VK_SHIFT] &= ~0x80;
}
break;
case VK_LCONTROL:
if ((m_keys[VK_RCONTROL] & 0x80) == 0) {
m_keys[VK_CONTROL] &= ~0x80;
}
break;
case VK_RCONTROL:
if ((m_keys[VK_LCONTROL] & 0x80) == 0) {
m_keys[VK_CONTROL] &= ~0x80;
}
break;
case VK_LMENU:
if ((m_keys[VK_RMENU] & 0x80) == 0) {
m_keys[VK_MENU] &= ~0x80;
}
break;
case VK_RMENU:
if ((m_keys[VK_LMENU] & 0x80) == 0) {
m_keys[VK_MENU] &= ~0x80;
}
break;
}
}
void
CMSWindowsSecondaryScreen::mouseDown(ButtonID button)
{
CLock lock(&m_mutex);
m_screen->syncDesktop();
// map button id to button flag
DWORD flags = mapButton(button, true);
// send event
if (flags != 0) {
mouse_event(flags, 0, 0, 0, 0);
}
}
void
CMSWindowsSecondaryScreen::mouseUp(ButtonID button)
{
CLock lock(&m_mutex);
m_screen->syncDesktop();
// map button id to button flag
DWORD flags = mapButton(button, false);
// send event
if (flags != 0) {
mouse_event(flags, 0, 0, 0, 0);
}
}
void
CMSWindowsSecondaryScreen::mouseMove(SInt32 x, SInt32 y)
{
CLock lock(&m_mutex);
m_screen->syncDesktop();
warpCursor(x, y);
}
void
CMSWindowsSecondaryScreen::mouseWheel(SInt32 delta)
{
CLock lock(&m_mutex);
m_screen->syncDesktop();
mouse_event(MOUSEEVENTF_WHEEL, 0, 0, delta, 0);
}
IScreen*
CMSWindowsSecondaryScreen::getScreen() const
{
return m_screen;
}
void
CMSWindowsSecondaryScreen::onScreensaver(bool)
{
// ignore
}
bool
CMSWindowsSecondaryScreen::onPreDispatch(const CEvent*)
{
return false;
}
bool
CMSWindowsSecondaryScreen::onEvent(CEvent* event)
{
assert(event != NULL);
const MSG& msg = event->m_msg;
switch (msg.message) {
case WM_ACTIVATEAPP:
if (msg.wParam == FALSE) {
// some other app activated. hide the hider window.
ShowWindow(m_window, SW_HIDE);
}
break;
}
return false;
}
SInt32
CMSWindowsSecondaryScreen::getJumpZoneSize() const
{
return 0;
}
void
CMSWindowsSecondaryScreen::postCreateWindow(HWND window)
{
m_window = window;
if (!isActive()) {
showWindow();
}
}
void
CMSWindowsSecondaryScreen::preDestroyWindow(HWND)
{
// do nothing
}
void
CMSWindowsSecondaryScreen::onPreMainLoop()
{
assert(m_window != NULL);
}
void
CMSWindowsSecondaryScreen::onPreOpen()
{
assert(m_window == NULL);
}
void
CMSWindowsSecondaryScreen::onPreEnter()
{
assert(m_window != NULL);
}
void
CMSWindowsSecondaryScreen::onPreLeave()
{
assert(m_window != NULL);
}
void
CMSWindowsSecondaryScreen::createWindow()
{
// open the desktop and the window
m_window = m_screen->openDesktop();
if (m_window == NULL) {
throw XScreenOpenFailure();
}
}
void
CMSWindowsSecondaryScreen::destroyWindow()
{
// release keys that are logically pressed
releaseKeys();
// close the desktop and the window
m_screen->closeDesktop();
m_window = NULL;
}
void
CMSWindowsSecondaryScreen::showWindow()
{
// move hider window under the mouse (rather than moving the mouse
// somewhere else on the screen)
SInt32 x, y;
getCursorPos(x, y);
MoveWindow(m_window, x, y, 1, 1, FALSE);
// raise and show the hider window. take activation.
ShowWindow(m_window, SW_SHOWNORMAL);
}
void
CMSWindowsSecondaryScreen::hideWindow()
{
ShowWindow(m_window, SW_HIDE);
}
void
CMSWindowsSecondaryScreen::warpCursor(SInt32 x, SInt32 y)
{
typedef UINT (WINAPI *SendInput_t)(UINT, LPINPUT, int);
static bool gotSendInput = false;
static SendInput_t SendInput = NULL;
// move the mouse directly to target position on NT family or if
// not using multiple monitors.
if (m_screen->isMultimon() || !m_is95Family) {
SInt32 x0, y0, w, h;
m_screen->getShape(x0, y0, w, h);
mouse_event(MOUSEEVENTF_MOVE | MOUSEEVENTF_ABSOLUTE,
(DWORD)((65535.99 * (x - x0)) / (w - 1)),
(DWORD)((65535.99 * (y - y0)) / (h - 1)),
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.
//
// we use the microsoft recommendation (Q193003): set the absolute
// position on the primary monitor, disable mouse acceleration,
// relative move the mouse to the final location, restore mouse
// acceleration. to avoid one kind of race condition (the user
// clicking the mouse or pressing a key between the absolute and
// relative move) we'll use SendInput() which guarantees that the
// events are delivered uninterrupted. we cannot prevent changes
// to the mouse acceleration at inopportune times, though. if
// SendInput() is unavailable then use mouse_event(); SendInput()
// is not available on Windows 95 and NT 4.0 prior to SP3.
//
// point-to-activate (x-mouse) doesn't seem to be bothered by the
// absolute/relative combination. a window over the absolute
// position (0,0) does *not* get activated (at least not on win2k)
// if the relative move puts the cursor elsewhere. similarly, the
// app under the final mouse position does *not* get deactivated
// by the absolute move to 0,0.
else {
// lookup SendInput() function
if (!gotSendInput) {
gotSendInput = true;
HINSTANCE user32 = LoadLibrary("user32.dll");
if (user32 != NULL) {
SendInput = reinterpret_cast<SendInput_t>(
GetProcAddress(user32, "SendInput"));
FreeLibrary(user32);
}
}
// 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);
}
// send events
INPUT events[2];
events[0].type = INPUT_MOUSE;
events[0].mi.dx = 0;
events[0].mi.dy = 0;
events[0].mi.mouseData = 0;
events[0].mi.dwFlags = MOUSEEVENTF_ABSOLUTE | MOUSEEVENTF_MOVE;
events[0].mi.time = GetTickCount();
events[0].mi.dwExtraInfo = 0;
events[1].type = INPUT_MOUSE;
events[1].mi.dx = x;
events[1].mi.dy = y;
events[1].mi.mouseData = 0;
events[1].mi.dwFlags = MOUSEEVENTF_MOVE;
events[1].mi.time = events[0].mi.time;
events[1].mi.dwExtraInfo = 0;
if (SendInput != NULL) {
SendInput(sizeof(events) / sizeof(events[0]),
events, sizeof(events[0]));
}
else {
mouse_event(events[0].mi.dwFlags,
events[0].mi.dx,
events[0].mi.dy,
events[0].mi.mouseData,
events[0].mi.dwExtraInfo);
mouse_event(events[1].mi.dwFlags,
events[1].mi.dx,
events[1].mi.dy,
events[1].mi.mouseData,
events[1].mi.dwExtraInfo);
}
// restore mouse speed & acceleration
if (accelChanged) {
SystemParametersInfo(SPI_SETMOUSE, 0, oldSpeed, 0);
SystemParametersInfo(SPI_SETMOUSESPEED, 0, oldSpeed + 3, 0);
}
}
}
void
CMSWindowsSecondaryScreen::updateKeys()
{
// clear key state
memset(m_keys, 0, sizeof(m_keys));
// we only care about the modifier key states
m_keys[VK_LSHIFT] = static_cast<BYTE>(GetKeyState(VK_LSHIFT));
m_keys[VK_RSHIFT] = static_cast<BYTE>(GetKeyState(VK_RSHIFT));
m_keys[VK_SHIFT] = static_cast<BYTE>(GetKeyState(VK_SHIFT));
m_keys[VK_LCONTROL] = static_cast<BYTE>(GetKeyState(VK_LCONTROL));
m_keys[VK_RCONTROL] = static_cast<BYTE>(GetKeyState(VK_RCONTROL));
m_keys[VK_CONTROL] = static_cast<BYTE>(GetKeyState(VK_CONTROL));
m_keys[VK_LMENU] = static_cast<BYTE>(GetKeyState(VK_LMENU));
m_keys[VK_RMENU] = static_cast<BYTE>(GetKeyState(VK_RMENU));
m_keys[VK_MENU] = static_cast<BYTE>(GetKeyState(VK_MENU));
m_keys[VK_LWIN] = static_cast<BYTE>(GetKeyState(VK_LWIN));
m_keys[VK_RWIN] = static_cast<BYTE>(GetKeyState(VK_RWIN));
m_keys[VK_APPS] = static_cast<BYTE>(GetKeyState(VK_APPS));
m_keys[VK_CAPITAL] = static_cast<BYTE>(GetKeyState(VK_CAPITAL));
m_keys[VK_NUMLOCK] = static_cast<BYTE>(GetKeyState(VK_NUMLOCK));
m_keys[VK_SCROLL] = static_cast<BYTE>(GetKeyState(VK_SCROLL));
// update active modifier mask
m_mask = 0;
if ((m_keys[VK_LSHIFT] & 0x80) != 0 || (m_keys[VK_RSHIFT] & 0x80) != 0) {
m_mask |= KeyModifierShift;
}
if ((m_keys[VK_LCONTROL] & 0x80) != 0 ||
(m_keys[VK_RCONTROL] & 0x80) != 0) {
m_mask |= KeyModifierControl;
}
if ((m_keys[VK_LMENU] & 0x80) != 0 || (m_keys[VK_RMENU] & 0x80) != 0) {
m_mask |= KeyModifierAlt;
}
if ((m_keys[VK_LWIN] & 0x80) != 0 || (m_keys[VK_RWIN] & 0x80) != 0) {
m_mask |= KeyModifierMeta;
}
if ((m_keys[VK_CAPITAL] & 0x01) != 0) {
m_mask |= KeyModifierCapsLock;
}
if ((m_keys[VK_NUMLOCK] & 0x01) != 0) {
m_mask |= KeyModifierNumLock;
}
if ((m_keys[VK_SCROLL] & 0x01) != 0) {
m_mask |= KeyModifierScrollLock;
}
// note -- do not save KeyModifierModeSwitch in m_mask
log((CLOG_DEBUG2 "modifiers on update: 0x%04x", m_mask));
}
void
CMSWindowsSecondaryScreen::setToggleState(KeyModifierMask mask)
{
// toggle modifiers that don't match the desired state
if ((mask & KeyModifierCapsLock) != (m_mask & KeyModifierCapsLock)) {
toggleKey(VK_CAPITAL, KeyModifierCapsLock);
}
if ((mask & KeyModifierNumLock) != (m_mask & KeyModifierNumLock)) {
toggleKey(VK_NUMLOCK | 0x100, KeyModifierNumLock);
}
if ((mask & KeyModifierScrollLock) != (m_mask & KeyModifierScrollLock)) {
toggleKey(VK_SCROLL, KeyModifierScrollLock);
}
}
// map special KeyID keys to virtual key codes. if the key is an
// extended key then the entry is the virtual key code | 0x100.
// unmapped keys have a 0 entry.
static const UINT g_mapEE00[] =
{
/* 0x00 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x08 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x10 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x18 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x20 */ VK_TAB, 0, 0, 0, 0, 0, 0, 0,
/* 0x28 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x30 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x38 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x40 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x48 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x50 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x58 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x60 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x68 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x70 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x78 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x80 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x88 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x90 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x98 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0xa0 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0xa8 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0xb0 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0xb8 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0xc0 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0xc8 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0xd0 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0xd8 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0xe0 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0xe8 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0xf0 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0xf8 */ 0, 0, 0, 0, 0, 0, 0, 0
};
static const UINT g_mapEF00[] =
{
/* 0x00 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x08 */ VK_BACK, VK_TAB, 0, VK_CLEAR, 0, VK_RETURN, 0, 0,
/* 0x10 */ 0, 0, 0, VK_PAUSE, VK_SCROLL, 0/*sys-req*/, 0, 0,
/* 0x18 */ 0, 0, 0, VK_ESCAPE, 0, 0, 0, 0,
/* 0x20 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x28 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x30 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x38 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x40 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x48 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x50 */ VK_HOME|0x100, VK_LEFT|0x100, VK_UP|0x100, VK_RIGHT|0x100,
/* 0x54 */ VK_DOWN|0x100, VK_PRIOR|0x100, VK_NEXT|0x100, VK_END|0x100,
/* 0x58 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x60 */ VK_SELECT|0x100, VK_SNAPSHOT|0x100, VK_EXECUTE|0x100, VK_INSERT|0x100,
/* 0x64 */ 0, 0, 0, VK_APPS|0x100,
/* 0x68 */ 0, 0, VK_HELP|0x100, VK_CANCEL|0x100, 0, 0, 0, 0,
/* 0x70 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x78 */ 0, 0, 0, 0, 0, 0, VK_MODECHANGE|0x100, VK_NUMLOCK|0x100,
/* 0x80 */ VK_SPACE, 0, 0, 0, 0, 0, 0, 0,
/* 0x88 */ 0, VK_TAB, 0, 0, 0, VK_RETURN|0x100, 0, 0,
/* 0x90 */ 0, 0, 0, 0, 0, VK_HOME, VK_LEFT, VK_UP,
/* 0x98 */ VK_RIGHT, VK_DOWN, VK_PRIOR, VK_NEXT,
/* 0x9c */ VK_END, 0, VK_INSERT, VK_DELETE,
/* 0xa0 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0xa8 */ 0, 0, VK_MULTIPLY, VK_ADD,
/* 0xac */ VK_SEPARATOR, VK_SUBTRACT, VK_DECIMAL, VK_DIVIDE|0x100,
/* 0xb0 */ VK_NUMPAD0, VK_NUMPAD1, VK_NUMPAD2, VK_NUMPAD3,
/* 0xb4 */ VK_NUMPAD4, VK_NUMPAD5, VK_NUMPAD6, VK_NUMPAD7,
/* 0xb8 */ VK_NUMPAD8, VK_NUMPAD9, 0, 0, 0, 0, VK_F1, VK_F2,
/* 0xc0 */ VK_F3, VK_F4, VK_F5, VK_F6, VK_F7, VK_F8, VK_F9, VK_F10,
/* 0xc8 */ VK_F11, VK_F12, VK_F13, VK_F14, VK_F15, VK_F16, VK_F17, VK_F18,
/* 0xd0 */ VK_F19, VK_F20, VK_F21, VK_F22, VK_F23, VK_F24, 0, 0,
/* 0xd8 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0xe0 */ 0, VK_LSHIFT, VK_RSHIFT, VK_LCONTROL,
/* 0xe4 */ VK_RCONTROL|0x100, VK_CAPITAL, 0, VK_LWIN|0x100,
/* 0xe8 */ VK_RWIN|0x100, VK_LMENU, VK_RMENU|0x100, 0, 0, 0, 0, 0,
/* 0xf0 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 0xf8 */ 0, 0, 0, 0, 0, 0, 0, VK_DELETE|0x100
};
DWORD
CMSWindowsSecondaryScreen::mapButton(ButtonID button, bool press) const
{
// map button id to button flag
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;
default:
return 0;
}
}
KeyModifierMask
CMSWindowsSecondaryScreen::mapKey(Keystrokes& keys, UINT& virtualKey,
KeyID id, KeyModifierMask mask, EKeyAction action) const
{
virtualKey = 0;
// check for special keys
if ((id & 0xfffff000) == 0xe000) {
if ((id & 0xff00) == 0xee00) {
virtualKey = g_mapEE00[id & 0xff];
}
else if ((id & 0xff00) == 0xef00) {
virtualKey = g_mapEF00[id & 0xff];
}
if (virtualKey == 0) {
log((CLOG_DEBUG2 "unknown special key"));
return m_mask;
}
}
// special handling of VK_SNAPSHOT
if ((virtualKey & 0xff) == VK_SNAPSHOT) {
// ignore key repeats on print screen
if (action != kRepeat) {
// get event flags
DWORD flags = 0;
if (isExtendedKey(virtualKey)) {
flags |= KEYEVENTF_EXTENDEDKEY;
}
if (action != kPress) {
flags |= KEYEVENTF_KEYUP;
}
// active window or fullscreen?
BYTE scan = 0;
if ((mask & KeyModifierAlt) == 0) {
scan = 1;
}
// send event
keybd_event(static_cast<BYTE>(virtualKey & 0xff), scan, flags, 0);
}
return m_mask;
}
// get output mask. default output mask carries over the current
// toggle modifier states and includes desired shift, control, alt,
// and meta states.
KeyModifierMask outMask = (m_mask &
(KeyModifierCapsLock |
KeyModifierNumLock |
KeyModifierScrollLock));
outMask |= (mask &
(KeyModifierShift |
KeyModifierControl |
KeyModifierAlt |
KeyModifierMeta));
// set control and alt if mode shift (AltGr) is requested
if ((mask & KeyModifierModeSwitch) != 0) {
outMask |= KeyModifierControl | KeyModifierAlt;
}
// extract extended key flag
const bool isExtended = ((virtualKey & 0x100) != 0);
virtualKey &= ~0x100;
// if not in map then ask system to convert character
if (virtualKey == 0) {
// translate. return no keys if unknown key.
// FIXME -- handle unicode
TCHAR ascii = static_cast<TCHAR>(id & 0x000000ff);
SHORT vk = VkKeyScan(ascii);
if (vk == 0xffff) {
log((CLOG_DEBUG2 "no virtual key for character %d", id));
return m_mask;
}
// use whatever shift state VkKeyScan says
// FIXME -- also for control and alt, but it's more difficult
// to determine if control and alt must be off or if it just
// doesn't matter.
outMask &= ~KeyModifierShift;
// convert system modifier mask to our mask
if (HIBYTE(vk) & 1) {
outMask |= KeyModifierShift;
}
if (HIBYTE(vk) & 2) {
outMask |= KeyModifierControl;
}
if (HIBYTE(vk) & 4) {
outMask |= KeyModifierAlt;
}
// handle combination of caps-lock and shift. if caps-lock is
// off locally then use shift as necessary. if caps-lock is on
// locally then it reverses the meaning of shift for keys that
// are subject to case conversion.
if ((outMask & KeyModifierCapsLock) != 0) {
if (tolower(ascii) != toupper(ascii)) {
log((CLOG_DEBUG2 "flip shift"));
outMask ^= KeyModifierShift;
}
}
// get virtual key
virtualKey = LOBYTE(vk);
}
// if in map then figure out correct modifier state
else {
// check numeric keypad. note that while KeyID distinguishes
// between the keypad movement keys (e.g. Home, left arrow),
// the virtual keys do not. however, the virtual keys do
// distinguish between keypad numbers and operators (e.g.
// add, multiply) and their main keyboard counterparts.
// therefore, we can ignore the num-lock state for movement
// virtual keys but not for numeric keys.
if (virtualKey >= VK_NUMPAD0 && virtualKey <= VK_DIVIDE) {
// set required shift state based on current numlock state
if ((outMask & KeyModifierNumLock) == 0) {
if ((m_mask & KeyModifierNumLock) == 0) {
log((CLOG_DEBUG2 "turn on num lock for keypad key"));
outMask |= KeyModifierNumLock;
}
else {
log((CLOG_DEBUG2 "turn on shift for keypad key"));
outMask |= KeyModifierShift;
}
}
}
// check for left tab
else if (id == kKeyLeftTab) {
outMask |= KeyModifierShift;
}
}
log((CLOG_DEBUG2 "KeyID %d to virtual key %d mask 0x%04x", id, virtualKey, outMask));
// a list of modifier key info
class CModifierInfo {
public:
KeyModifierMask m_mask;
UINT m_virtualKey;
UINT m_virtualKey2;
bool m_isToggle;
};
static const CModifierInfo s_modifier[] = {
{ KeyModifierShift, VK_LSHIFT, VK_RSHIFT, false },
{ KeyModifierControl, VK_LCONTROL, VK_RCONTROL | 0x100,false },
{ KeyModifierAlt, VK_LMENU, VK_RMENU | 0x100, false },
{ KeyModifierMeta, VK_LWIN | 0x100, VK_RWIN | 0x100, false },
{ KeyModifierCapsLock, VK_CAPITAL, 0, true },
{ KeyModifierNumLock, VK_NUMLOCK | 0x100, 0, true },
{ KeyModifierScrollLock,VK_SCROLL, 0, true }
};
static const unsigned int s_numModifiers =
sizeof(s_modifier) / sizeof(s_modifier[0]);
// note if the key is a modifier
unsigned int modifierIndex;
switch (virtualKey) {
case VK_SHIFT:
case VK_LSHIFT:
case VK_RSHIFT:
modifierIndex = 0;
break;
case VK_CONTROL:
case VK_LCONTROL:
case VK_RCONTROL:
modifierIndex = 1;
break;
case VK_MENU:
case VK_LMENU:
case VK_RMENU:
modifierIndex = 2;
break;
case VK_LWIN:
case VK_RWIN:
modifierIndex = 3;
break;
case VK_CAPITAL:
modifierIndex = 4;
break;
case VK_NUMLOCK:
modifierIndex = 5;
break;
case VK_SCROLL:
modifierIndex = 6;
break;
default:
modifierIndex = s_numModifiers;
break;
}
const bool isModifier = (modifierIndex != s_numModifiers);
// add the key events required to get to the modifier state
// necessary to generate an event yielding id. also save the
// key events required to restore the state. if the key is
// a modifier key then skip this because modifiers should not
// modify modifiers.
Keystrokes undo;
Keystroke keystroke;
if (outMask != m_mask && !isModifier) {
for (unsigned int i = 0; i < s_numModifiers; ++i) {
KeyModifierMask bit = s_modifier[i].m_mask;
if ((outMask & bit) != (m_mask & bit)) {
if ((outMask & bit) != 0) {
// modifier is not active but should be. if the
// modifier is a toggle then toggle it on with a
// press/release, otherwise activate it with a
// press.
keystroke.m_virtualKey = s_modifier[i].m_virtualKey;
keystroke.m_press = true;
keystroke.m_repeat = false;
keys.push_back(keystroke);
if (s_modifier[i].m_isToggle) {
keystroke.m_press = false;
keys.push_back(keystroke);
undo.push_back(keystroke);
keystroke.m_press = true;
undo.push_back(keystroke);
}
else {
keystroke.m_press = false;
undo.push_back(keystroke);
}
}
else {
// modifier is active but should not be. if the
// modifier is a toggle then toggle it off with a
// press/release, otherwise deactivate it with a
// release. we must check each keycode for the
// modifier if not a toggle.
if (s_modifier[i].m_isToggle) {
keystroke.m_virtualKey = s_modifier[i].m_virtualKey;
keystroke.m_press = true;
keystroke.m_repeat = false;
keys.push_back(keystroke);
keystroke.m_press = false;
keys.push_back(keystroke);
undo.push_back(keystroke);
keystroke.m_press = true;
undo.push_back(keystroke);
}
else {
UINT key = s_modifier[i].m_virtualKey;
if ((m_keys[key & 0xff] & 0x80) != 0) {
keystroke.m_virtualKey = key;
keystroke.m_press = false;
keystroke.m_repeat = false;
keys.push_back(keystroke);
keystroke.m_press = true;
undo.push_back(keystroke);
}
key = s_modifier[i].m_virtualKey2;
if (key != 0 && (m_keys[key & 0xff] & 0x80) != 0) {
keystroke.m_virtualKey = key;
keystroke.m_press = false;
keystroke.m_repeat = false;
keys.push_back(keystroke);
keystroke.m_press = true;
undo.push_back(keystroke);
}
}
}
}
}
}
// add the key event
keystroke.m_virtualKey = virtualKey;
if (isExtended) {
keystroke.m_virtualKey |= 0x100;
}
switch (action) {
case kPress:
keystroke.m_press = true;
keystroke.m_repeat = false;
keys.push_back(keystroke);
break;
case kRelease:
keystroke.m_press = false;
keystroke.m_repeat = false;
keys.push_back(keystroke);
break;
case kRepeat:
keystroke.m_press = true;
keystroke.m_repeat = true;
keys.push_back(keystroke);
break;
}
// add key events to restore the modifier state. apply events in
// the reverse order that they're stored in undo.
while (!undo.empty()) {
keys.push_back(undo.back());
undo.pop_back();
}
// if the key is a modifier key then compute the modifier mask after
// this key is pressed.
mask = m_mask;
if (isModifier && action != kRepeat) {
// toggle keys modify the state on release. other keys set
// the bit on press and clear the bit on release.
const CModifierInfo& modifier = s_modifier[modifierIndex];
if (modifier.m_isToggle) {
if (action == kRelease) {
mask ^= modifier.m_mask;
}
}
else if (action == kPress) {
mask |= modifier.m_mask;
}
else {
// can't reset bit until all keys that set it are released.
// scan those keys to see if any are pressed.
bool down = false;
if (virtualKey != (modifier.m_virtualKey & 0xff) &&
(m_keys[modifier.m_virtualKey & 0xff] & 0x80) != 0) {
down = true;
}
if (modifier.m_virtualKey2 != 0 &&
virtualKey != (modifier.m_virtualKey2 & 0xff) &&
(m_keys[modifier.m_virtualKey2 & 0xff] & 0x80) != 0) {
down = true;
}
if (!down)
mask &= ~modifier.m_mask;
}
}
log((CLOG_DEBUG2 "previous modifiers 0x%04x, final modifiers 0x%04x", m_mask, mask));
return mask;
}
void
CMSWindowsSecondaryScreen::doKeystrokes(const Keystrokes& keys, SInt32 count)
{
// do nothing if no keys or no repeats
if (count < 1 || keys.empty()) {
return;
}
// generate key events
for (Keystrokes::const_iterator k = keys.begin(); k != keys.end(); ) {
if (k->m_repeat) {
// repeat from here up to but not including the next key
// with m_repeat == false count times.
Keystrokes::const_iterator start = k;
for (; count > 0; --count) {
// send repeating events
for (k = start; k != keys.end() && k->m_repeat; ++k) {
sendKeyEvent(k->m_virtualKey, k->m_press);
}
}
// note -- k is now on the first non-repeat key after the
// repeat keys, exactly where we'd like to continue from.
}
else {
// send event
sendKeyEvent(k->m_virtualKey, k->m_press);
// next key
++k;
}
}
}
void
CMSWindowsSecondaryScreen::releaseKeys()
{
CLock lock(&m_mutex);
m_screen->syncDesktop();
// release left/right modifier keys first. if the platform doesn't
// support them then they won't be set and the non-side-distinuishing
// key will retain its state. if the platform does support them then
// the non-side-distinguishing will be reset.
if ((m_keys[VK_LSHIFT] & 0x80) != 0) {
sendKeyEvent(VK_LSHIFT, false);
m_keys[VK_SHIFT] = 0;
m_keys[VK_LSHIFT] = 0;
}
if ((m_keys[VK_RSHIFT] & 0x80) != 0) {
sendKeyEvent(VK_RSHIFT, false);
m_keys[VK_SHIFT] = 0;
m_keys[VK_RSHIFT] = 0;
}
if ((m_keys[VK_LCONTROL] & 0x80) != 0) {
sendKeyEvent(VK_LCONTROL, false);
m_keys[VK_CONTROL] = 0;
m_keys[VK_LCONTROL] = 0;
}
if ((m_keys[VK_RCONTROL] & 0x80) != 0) {
sendKeyEvent(VK_RCONTROL, false);
m_keys[VK_CONTROL] = 0;
m_keys[VK_RCONTROL] = 0;
}
if ((m_keys[VK_LMENU] & 0x80) != 0) {
sendKeyEvent(VK_LMENU, false);
m_keys[VK_MENU] = 0;
m_keys[VK_LMENU] = 0;
}
if ((m_keys[VK_RMENU] & 0x80) != 0) {
sendKeyEvent(VK_RMENU, false);
m_keys[VK_MENU] = 0;
m_keys[VK_RMENU] = 0;
}
// now check all the other keys
for (UInt32 i = 0; i < sizeof(m_keys) / sizeof(m_keys[0]); ++i) {
if ((m_keys[i] & 0x80) != 0) {
sendKeyEvent(i, false);
m_keys[i] = 0;
}
}
}
void
CMSWindowsSecondaryScreen::toggleKey(UINT virtualKey, KeyModifierMask mask)
{
// send key events to simulate a press and release
sendKeyEvent(virtualKey, true);
sendKeyEvent(virtualKey, false);
// toggle shadow state
m_mask ^= mask;
m_keys[virtualKey & 0xff] ^= 0x01;
}
UINT
CMSWindowsSecondaryScreen::virtualKeyToScanCode(UINT& virtualKey) const
{
// try mapping given virtual key
UINT code = MapVirtualKey(virtualKey & 0xff, 0);
if (code != 0) {
return code;
}
// no dice. if the virtual key distinguishes between left/right
// then try the one that doesn't distinguish sides. windows (or
// keyboard drivers) are inconsistent in their treatment of these
// virtual keys. the following behaviors have been observed:
//
// win2k (gateway desktop):
// MapVirtualKey(vk, 0):
// VK_SHIFT == VK_LSHIFT != VK_RSHIFT
// VK_CONTROL == VK_LCONTROL == VK_RCONTROL
// VK_MENU == VK_LMENU == VK_RMENU
// MapVirtualKey(sc, 3):
// VK_LSHIFT and VK_RSHIFT mapped independently
// VK_LCONTROL is mapped but not VK_RCONTROL
// VK_LMENU is mapped but not VK_RMENU
//
// win me (sony vaio laptop):
// MapVirtualKey(vk, 0):
// VK_SHIFT mapped; VK_LSHIFT, VK_RSHIFT not mapped
// VK_CONTROL mapped; VK_LCONTROL, VK_RCONTROL not mapped
// VK_MENU mapped; VK_LMENU, VK_RMENU not mapped
// MapVirtualKey(sc, 3):
// all scan codes unmapped (function apparently unimplemented)
switch (virtualKey & 0xff) {
case VK_LSHIFT:
case VK_RSHIFT:
virtualKey = VK_SHIFT;
return MapVirtualKey(VK_SHIFT, 0);
case VK_LCONTROL:
case VK_RCONTROL:
virtualKey = VK_CONTROL;
return MapVirtualKey(VK_CONTROL, 0);
case VK_LMENU:
case VK_RMENU:
virtualKey = VK_MENU;
return MapVirtualKey(VK_MENU, 0);
default:
return 0;
}
}
bool
CMSWindowsSecondaryScreen::isExtendedKey(UINT virtualKey) const
{
// see if we've already encoded the extended flag
if ((virtualKey & 0x100) != 0) {
return true;
}
// check known virtual keys
switch (virtualKey & 0xff) {
case VK_NUMLOCK:
case VK_RCONTROL:
case VK_RMENU:
case VK_LWIN:
case VK_RWIN:
case VK_APPS:
return true;
default:
return false;
}
}
void
CMSWindowsSecondaryScreen::sendKeyEvent(UINT virtualKey, bool press)
{
DWORD flags = 0;
if (isExtendedKey(virtualKey)) {
flags |= KEYEVENTF_EXTENDEDKEY;
}
if (!press) {
flags |= KEYEVENTF_KEYUP;
}
const UINT code = virtualKeyToScanCode(virtualKey);
keybd_event(static_cast<BYTE>(virtualKey & 0xff),
static_cast<BYTE>(code), flags, 0);
log((CLOG_DEBUG1 "send key %d, 0x%04x, %s%s", virtualKey & 0xff, code, ((flags & KEYEVENTF_KEYUP) ? "release" : "press"), ((flags & KEYEVENTF_EXTENDEDKEY) ? " extended" : "")));
}
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