Added support for a global relative mouse motion option. When true

and on a secondary screen and locked to the screen (via scroll lock)
mouse motion is sent as motion deltas.  When true and scroll lock
is toggled off the mouse is warped to the secondary screen's center
so the server knows where it is.  This option is intended to support
games and other programs that repeatedly warp the mouse to the center
of the screen.  This change adds general and X11 support but not
win32.  The option name is "relativeMouseMoves".

lib/server/CClientProxy.h

@@ -96,6 +96,7 @@ public:
 	virtual void		mouseDown(ButtonID) = 0;
 	virtual void		mouseUp(ButtonID) = 0;
 	virtual void		mouseMove(SInt32 xAbs, SInt32 yAbs) = 0;
+	virtual void		mouseRelativeMove(SInt32 xRel, SInt32 yRel) = 0;
 	virtual void		mouseWheel(SInt32 delta) = 0;
 	virtual void		screensaver(bool activate) = 0;
 	virtual void		resetOptions() = 0;

lib/server/CClientProxy1_0.cpp

@@ -316,6 +316,12 @@ CClientProxy1_0::mouseMove(SInt32 xAbs, SInt32 yAbs)
 	CProtocolUtil::writef(getStream(), kMsgDMouseMove, xAbs, yAbs);
 }
 
+void
+CClientProxy1_0::mouseRelativeMove(SInt32, SInt32)
+{
+	// ignore -- not supported in protocol 1.0
+}
+
 void
 CClientProxy1_0::mouseWheel(SInt32 delta)
 {

lib/server/CClientProxy1_0.h

@@ -49,6 +49,7 @@ public:
 	virtual void		mouseDown(ButtonID);
 	virtual void		mouseUp(ButtonID);
 	virtual void		mouseMove(SInt32 xAbs, SInt32 yAbs);
+	virtual void		mouseRelativeMove(SInt32 xRel, SInt32 yRel);
 	virtual void		mouseWheel(SInt32 delta);
 	virtual void		screensaver(bool activate);
 	virtual void		resetOptions();

lib/server/CClientProxyUnknown.cpp

@@ -15,6 +15,7 @@
 #include "CClientProxyUnknown.h"
 #include "CClientProxy1_0.h"
 #include "CClientProxy1_1.h"
+#include "CClientProxy1_2.h"
 #include "ProtocolTypes.h"
 #include "CProtocolUtil.h"
 #include "XSynergy.h"
@@ -214,6 +215,10 @@ CClientProxyUnknown::handleData(const CEvent&, void*)
 			case 1:
 				m_proxy = new CClientProxy1_1(name, m_stream);
 				break;
+
+			case 2:
+				m_proxy = new CClientProxy1_2(name, m_stream);
+				break;
 			}
 		}
 

lib/server/CConfig.cpp

@@ -629,6 +629,9 @@ CConfig::getOptionName(OptionID id)
 	if (id == kOptionXTestXineramaUnaware) {
 		return "xtestIsXineramaUnaware";
 	}
+	if (id == kOptionRelativeMouseMoves) {
+		return "relativeMouseMoves";
+	}
 	return NULL;
 }
 
@@ -638,7 +641,8 @@ CConfig::getOptionValue(OptionID id, OptionValue value)
 	if (id == kOptionHalfDuplexCapsLock ||
 		id == kOptionHalfDuplexNumLock ||
 		id == kOptionScreenSaverSync ||
-		id == kOptionXTestXineramaUnaware) {
+		id == kOptionXTestXineramaUnaware ||
+		id == kOptionRelativeMouseMoves) {
 		return (value != 0) ? "true" : "false";
 	}
 	if (id == kOptionModifierMapForShift ||
@@ -778,6 +782,9 @@ CConfig::readSectionOptions(std::istream& s)
 		else if (name == "screenSaverSync") {
 			addOption("", kOptionScreenSaverSync, parseBoolean(value));
 		}
+		else if (name == "relativeMouseMoves") {
+			addOption("", kOptionRelativeMouseMoves, parseBoolean(value));
+		}
 		else {
 			throw XConfigRead("unknown argument");
 		}

lib/server/CPrimaryClient.cpp

@@ -185,6 +185,12 @@ CPrimaryClient::mouseMove(SInt32 x, SInt32 y)
 	m_screen->warpCursor(x, y);
 }
 
+void
+CPrimaryClient::mouseRelativeMove(SInt32, SInt32)
+{
+	// ignore
+}
+
 void
 CPrimaryClient::mouseWheel(SInt32)
 {

lib/server/CPrimaryClient.h

@@ -102,6 +102,7 @@ public:
 	virtual void		mouseDown(ButtonID);
 	virtual void		mouseUp(ButtonID);
 	virtual void		mouseMove(SInt32 xAbs, SInt32 yAbs);
+	virtual void		mouseRelativeMove(SInt32 xRel, SInt32 yRel);
 	virtual void		mouseWheel(SInt32 delta);
 	virtual void		screensaver(bool activate);
 	virtual void		resetOptions();

lib/server/CServer.cpp

@@ -53,7 +53,8 @@ CServer::CServer(const CConfig& config, CPrimaryClient* primaryClient) :
 	m_switchTwoTapDelay(0.0),
 	m_switchTwoTapEngaged(false),
 	m_switchTwoTapArmed(false),
-	m_switchTwoTapZone(3)
+	m_switchTwoTapZone(3),
+	m_relativeMoves(false)
 {
 	// must have a primary client and it must have a canonical name
 	assert(m_primaryClient != NULL);
@@ -283,6 +284,9 @@ CServer::onCommandKey(KeyID id, KeyModifierMask /*mask*/, bool /*down*/)
 {
 	if (id == kKeyScrollLock) {
 		m_primaryClient->reconfigure(getActivePrimarySides());
+		if (!isLockedToScreenServer()) {
+			stopRelativeMoves();
+		}
 	}
 	return false;
 }
@@ -322,13 +326,7 @@ bool
 CServer::isLockedToScreenServer() const
 {
 	// locked if scroll-lock is toggled on
-	if ((m_primaryClient->getToggleMask() & KeyModifierScrollLock) != 0) {
-		LOG((CLOG_DEBUG "locked by ScrollLock"));
-		return true;
-	}
-
-	// not locked
-	return false;
+	return ((m_primaryClient->getToggleMask() & KeyModifierScrollLock) != 0);
 }
 
 bool
@@ -336,6 +334,7 @@ CServer::isLockedToScreen() const
 {
 	// locked if we say we're locked
 	if (isLockedToScreenServer()) {
+		LOG((CLOG_DEBUG "locked by ScrollLock"));
 		return true;
 	}
 
@@ -841,6 +840,24 @@ CServer::isSwitchWaitStarted() const
 	return (m_switchWaitTimer != NULL);
 }
 
+void
+CServer::stopRelativeMoves()
+{
+	if (m_relativeMoves && m_active != m_primaryClient) {
+		// warp to the center of the active client so we know where we are
+		SInt32 ax, ay, aw, ah;
+		m_active->getShape(ax, ay, aw, ah);
+		m_x       = ax + (aw >> 1);
+		m_y       = ay + (ah >> 1);
+		m_xDelta  = 0;
+		m_yDelta  = 0;
+		m_xDelta2 = 0;
+		m_yDelta2 = 0;
+		LOG((CLOG_DEBUG2 "synchronize move on %s by %d,%d", getName(m_active).c_str(), m_x, m_y));
+		m_active->mouseMove(m_x, m_y);
+	}
+}
+
 void
 CServer::sendOptions(IClient* client) const
 {
@@ -883,6 +900,7 @@ CServer::processOptions()
 		return;
 	}
 
+	bool newRelativeMoves = m_relativeMoves;
 	for (CConfig::CScreenOptions::const_iterator index = options->begin();
 								index != options->end(); ++index) {
 		const OptionID id       = index->first;
@@ -901,7 +919,15 @@ CServer::processOptions()
 			}
 			stopSwitchTwoTap();
 		}
+		else if (id == kOptionRelativeMouseMoves) {
+			newRelativeMoves = (value != 0);
+		}
 	}
+
+	if (m_relativeMoves && !newRelativeMoves) {
+		stopRelativeMoves();
+	}
+	m_relativeMoves = newRelativeMoves;
 }
 
 void
@@ -1339,6 +1365,18 @@ CServer::onMouseMoveSecondary(SInt32 dx, SInt32 dy)
 		return;
 	}
 
+	// if doing relative motion on secondary screens and we're locked
+	// to the screen (which activates relative moves) then send a
+	// relative mouse motion.  when we're doing this we pretend as if
+	// the mouse isn't actually moving because we're expecting some
+	// program on the secondary screen to warp the mouse on us, so we
+	// have no idea where it really is.
+	if (m_relativeMoves && isLockedToScreenServer()) {
+		LOG((CLOG_DEBUG2 "relative move on %s by %d,%d", getName(m_active).c_str(), dx, dy));
+		m_active->mouseRelativeMove(dx, dy);
+		return;
+	}
+
 	// save old position
 	const SInt32 xOld = m_x;
 	const SInt32 yOld = m_y;

lib/server/CServer.h

@@ -26,8 +26,6 @@
 #include "stdset.h"
 #include "stdvector.h"
 
-class CClientProxy;
-class CClientProxyUnknown;
 class CEventQueueTimer;
 class CPrimaryClient;
 class IClient;
@@ -183,6 +181,9 @@ private:
 	// returns true iff the delay switch timer is started
 	bool				isSwitchWaitStarted() const;
 
+	// stop relative mouse moves
+	void				stopRelativeMoves();
+
 	// send screen options to \c client
 	void				sendOptions(IClient* client) const;
 
@@ -312,6 +313,9 @@ private:
 	bool				m_switchTwoTapArmed;
 	SInt32				m_switchTwoTapZone;
 
+	// relative mouse move option
+	bool				m_relativeMoves;
+
 	static CEvent::Type	s_errorEvent;
 	static CEvent::Type	s_disconnectedEvent;
 };

lib/server/Makefile.am

@@ -27,6 +27,7 @@ libserver_a_SOURCES = 				\
 	CClientProxy.cpp				\
 	CClientProxy1_0.cpp				\
 	CClientProxy1_1.cpp				\
+	CClientProxy1_2.cpp				\
 	CClientProxyUnknown.cpp			\
 	CConfig.cpp						\
 	CPrimaryClient.cpp				\
@@ -35,6 +36,7 @@ libserver_a_SOURCES = 				\
 	CClientProxy.h					\
 	CClientProxy1_0.h				\
 	CClientProxy1_1.h				\
+	CClientProxy1_2.h				\
 	CClientProxyUnknown.h			\
 	CConfig.h						\
 	CPrimaryClient.h				\