barrier/lib/synergy/CScreen.cpp

514 lines
10 KiB
C++

/*
* synergy -- mouse and keyboard sharing utility
* Copyright (C) 2003 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 "CScreen.h"
#include "IPlatformScreen.h"
#include "ProtocolTypes.h"
#include "CLog.h"
#include "IEventQueue.h"
//
// CScreen
//
CScreen::CScreen(IPlatformScreen* platformScreen) :
m_screen(platformScreen),
m_isPrimary(platformScreen->isPrimary()),
m_enabled(false),
m_entered(m_isPrimary),
m_screenSaverSync(true),
m_toggleKeys(0)
{
assert(m_screen != NULL);
// reset options
resetOptions();
LOG((CLOG_DEBUG "opened display"));
}
CScreen::~CScreen()
{
if (m_enabled) {
disable();
}
assert(!m_enabled);
assert(m_entered == m_isPrimary);
delete m_screen;
LOG((CLOG_DEBUG "closed display"));
}
void
CScreen::enable()
{
assert(!m_enabled);
m_screen->enable();
if (m_isPrimary) {
enablePrimary();
}
else {
enableSecondary();
}
// note activation
m_enabled = true;
}
void
CScreen::disable()
{
assert(m_enabled);
if (!m_isPrimary && m_entered) {
leave();
}
else if (m_isPrimary && !m_entered) {
enter(0);
}
m_screen->disable();
if (m_isPrimary) {
disablePrimary();
}
else {
disableSecondary();
}
// note deactivation
m_enabled = false;
}
void
CScreen::enter(KeyModifierMask toggleMask)
{
assert(m_entered == false);
LOG((CLOG_INFO "entering screen"));
// now on screen
m_entered = true;
m_screen->enter();
if (m_isPrimary) {
enterPrimary();
}
else {
enterSecondary(toggleMask);
}
}
bool
CScreen::leave()
{
assert(m_entered == true);
LOG((CLOG_INFO "leaving screen"));
if (!m_screen->leave()) {
return false;
}
if (m_isPrimary) {
leavePrimary();
}
else {
leaveSecondary();
}
// make sure our idea of clipboard ownership is correct
m_screen->checkClipboards();
// now not on screen
m_entered = false;
return true;
}
void
CScreen::reconfigure(UInt32 activeSides)
{
assert(m_isPrimary);
m_screen->reconfigure(activeSides);
}
void
CScreen::warpCursor(SInt32 x, SInt32 y)
{
assert(m_isPrimary);
m_screen->warpCursor(x, y);
}
void
CScreen::setClipboard(ClipboardID id, const IClipboard* clipboard)
{
m_screen->setClipboard(id, clipboard);
}
void
CScreen::grabClipboard(ClipboardID id)
{
m_screen->setClipboard(id, NULL);
}
void
CScreen::screensaver(bool activate)
{
if (!m_isPrimary) {
// activate/deactivation screen saver iff synchronization enabled
if (m_screenSaverSync) {
m_screen->screensaver(activate);
}
}
}
void
CScreen::keyDown(KeyID id, KeyModifierMask mask, KeyButton button)
{
assert(!m_isPrimary);
// check for ctrl+alt+del emulation
if (id == kKeyDelete &&
(mask & (KeyModifierControl | KeyModifierAlt)) ==
(KeyModifierControl | KeyModifierAlt)) {
LOG((CLOG_DEBUG "emulating ctrl+alt+del press"));
if (m_screen->fakeCtrlAltDel()) {
return;
}
}
m_screen->fakeKeyDown(id, mask, button);
}
void
CScreen::keyRepeat(KeyID id,
KeyModifierMask mask, SInt32 count, KeyButton button)
{
assert(!m_isPrimary);
m_screen->fakeKeyRepeat(id, mask, count, button);
}
void
CScreen::keyUp(KeyID, KeyModifierMask, KeyButton button)
{
assert(!m_isPrimary);
m_screen->fakeKeyUp(button);
}
void
CScreen::mouseDown(ButtonID button)
{
assert(!m_isPrimary);
m_screen->fakeMouseButton(button, true);
}
void
CScreen::mouseUp(ButtonID button)
{
assert(!m_isPrimary);
m_screen->fakeMouseButton(button, false);
}
void
CScreen::mouseMove(SInt32 x, SInt32 y)
{
assert(!m_isPrimary);
m_screen->fakeMouseMove(x, y);
}
void
CScreen::mouseRelativeMove(SInt32 dx, SInt32 dy)
{
assert(!m_isPrimary);
m_screen->fakeMouseRelativeMove(dx, dy);
}
void
CScreen::mouseWheel(SInt32 delta)
{
assert(!m_isPrimary);
m_screen->fakeMouseWheel(delta);
}
void
CScreen::resetOptions()
{
// reset options
m_halfDuplex = 0;
// if screen saver synchronization was off then turn it on since
// that's the default option state.
if (!m_screenSaverSync) {
m_screenSaverSync = true;
if (!m_isPrimary) {
m_screen->openScreensaver(false);
}
}
// let screen handle its own options
m_screen->resetOptions();
}
void
CScreen::setOptions(const COptionsList& options)
{
// update options
bool oldScreenSaverSync = m_screenSaverSync;
for (UInt32 i = 0, n = options.size(); i < n; i += 2) {
if (options[i] == kOptionScreenSaverSync) {
m_screenSaverSync = (options[i + 1] != 0);
LOG((CLOG_DEBUG1 "screen saver synchronization %s", m_screenSaverSync ? "on" : "off"));
}
else if (options[i] == kOptionHalfDuplexCapsLock) {
if (options[i + 1] != 0) {
m_halfDuplex |= KeyModifierCapsLock;
}
else {
m_halfDuplex &= ~KeyModifierCapsLock;
}
m_screen->setHalfDuplexMask(m_halfDuplex);
LOG((CLOG_DEBUG1 "half-duplex caps-lock %s", ((m_halfDuplex & KeyModifierCapsLock) != 0) ? "on" : "off"));
}
else if (options[i] == kOptionHalfDuplexNumLock) {
if (options[i + 1] != 0) {
m_halfDuplex |= KeyModifierNumLock;
}
else {
m_halfDuplex &= ~KeyModifierNumLock;
}
m_screen->setHalfDuplexMask(m_halfDuplex);
LOG((CLOG_DEBUG1 "half-duplex num-lock %s", ((m_halfDuplex & KeyModifierNumLock) != 0) ? "on" : "off"));
}
}
// update screen saver synchronization
if (!m_isPrimary && oldScreenSaverSync != m_screenSaverSync) {
if (m_screenSaverSync) {
m_screen->openScreensaver(false);
}
else {
m_screen->closeScreensaver();
}
}
// let screen handle its own options
m_screen->setOptions(options);
}
void
CScreen::setSequenceNumber(UInt32 seqNum)
{
m_screen->setSequenceNumber(seqNum);
}
bool
CScreen::isOnScreen() const
{
return m_entered;
}
bool
CScreen::isLockedToScreen() const
{
// check for pressed mouse buttons
if (m_screen->isAnyMouseButtonDown()) {
LOG((CLOG_DEBUG "locked by mouse button"));
return true;
}
// note -- we don't lock to the screen if a key is down. key
// reporting is simply not reliable enough to trust. the effect
// of switching screens with a key down is that the client will
// receive key repeats and key releases for keys that it hasn't
// see go down. that's okay because CKeyState will ignore those
// events. the user might be surprised that any modifier keys
// held while crossing to another screen don't apply on the
// target screen. if that ends up being a problem we can try
// to synthesize a key press for those modifiers on entry.
/*
// check for any pressed key
KeyButton key = isAnyKeyDown();
if (key != 0) {
// double check current state of the keys. this shouldn't
// be necessary but we don't seem to get some key release
// events sometimes. this is an emergency backup so the
// client doesn't get stuck on the screen.
m_screen->updateKeys();
KeyButton key2 = isAnyKeyDown();
if (key2 != 0) {
LOG((CLOG_DEBUG "locked by %s", m_screen->getKeyName(key2)));
return true;
}
else {
LOG((CLOG_DEBUG "spuriously locked by %s", m_screen->getKeyName(key)));
}
}
*/
// not locked
return false;
}
SInt32
CScreen::getJumpZoneSize() const
{
if (!m_isPrimary) {
return 0;
}
else {
return m_screen->getJumpZoneSize();
}
}
void
CScreen::getCursorCenter(SInt32& x, SInt32& y) const
{
m_screen->getCursorCenter(x, y);
}
KeyModifierMask
CScreen::getActiveModifiers() const
{
return m_screen->getActiveModifiers();
}
void*
CScreen::getEventTarget() const
{
return m_screen;
}
bool
CScreen::getClipboard(ClipboardID id, IClipboard* clipboard) const
{
return m_screen->getClipboard(id, clipboard);
}
void
CScreen::getShape(SInt32& x, SInt32& y, SInt32& w, SInt32& h) const
{
m_screen->getShape(x, y, w, h);
}
void
CScreen::getCursorPos(SInt32& x, SInt32& y) const
{
m_screen->getCursorPos(x, y);
}
void
CScreen::enablePrimary()
{
// get notified of screen saver activation/deactivation
m_screen->openScreensaver(true);
// claim screen changed size
EVENTQUEUE->addEvent(CEvent(getShapeChangedEvent(), getEventTarget()));
}
void
CScreen::enableSecondary()
{
// assume primary has all clipboards
for (ClipboardID id = 0; id < kClipboardEnd; ++id) {
grabClipboard(id);
}
// disable the screen saver if synchronization is enabled
if (m_screenSaverSync) {
m_screen->openScreensaver(false);
}
}
void
CScreen::disablePrimary()
{
// done with screen saver
m_screen->closeScreensaver();
}
void
CScreen::disableSecondary()
{
// done with screen saver
m_screen->closeScreensaver();
}
void
CScreen::enterPrimary()
{
// do nothing
}
void
CScreen::enterSecondary(KeyModifierMask toggleMask)
{
// remember toggle key state. we'll restore this when we leave.
m_toggleKeys = getActiveModifiers();
// restore toggle key state
setToggleState(toggleMask);
}
void
CScreen::leavePrimary()
{
// do nothing
}
void
CScreen::leaveSecondary()
{
// release any keys we think are still down
releaseKeys();
// restore toggle key state
setToggleState(m_toggleKeys);
}
void
CScreen::releaseKeys()
{
// release keys that we've synthesized a press for and only those
// keys. we don't want to synthesize a release on a key the user
// is still physically pressing.
for (KeyButton i = 1; i < IKeyState::kNumButtons; ++i) {
if (m_screen->isKeyDown(i)) {
m_screen->fakeKeyUp(i);
}
}
}
void
CScreen::setToggleState(KeyModifierMask mask)
{
// toggle modifiers that don't match the desired state
KeyModifierMask different = (m_screen->getActiveModifiers() ^ mask);
if ((different & KeyModifierCapsLock) != 0) {
m_screen->fakeToggle(KeyModifierCapsLock);
}
if ((different & KeyModifierNumLock) != 0) {
m_screen->fakeToggle(KeyModifierNumLock);
}
if ((different & KeyModifierScrollLock) != 0) {
m_screen->fakeToggle(KeyModifierScrollLock);
}
}
KeyButton
CScreen::isAnyKeyDown() const
{
for (KeyButton i = 1; i < IKeyState::kNumButtons; ++i) {
if (m_screen->isKeyDown(i)) {
return i;
}
}
return 0;
}