Added fallback for when SetCursorPos, and some more debugging info (merged in from winsvc branch).

This commit is contained in:
Nick Bolton 2009-12-27 21:48:51 +00:00
parent 4eb9c39aae
commit 771592a47f
2 changed files with 63 additions and 12 deletions

View File

@ -296,7 +296,9 @@ CMSWindowsScreen::leave()
m_desks->leave(m_keyLayout);
if (m_isPrimary) {
// warp to center
LOG((CLOG_DEBUG1 "warping cursor to center: %+d, %+d", m_xCenter, m_yCenter));
warpCursor(m_xCenter, m_yCenter);
// disable special key sequences on win95 family
@ -480,9 +482,16 @@ CMSWindowsScreen::warpCursor(SInt32 x, SInt32 y)
// do nothing
}
// save position as last position
// save position to compute delta of next motion
saveMousePosition(x, y);
}
void CMSWindowsScreen::saveMousePosition(SInt32 x, SInt32 y) {
m_xCursor = x;
m_yCursor = y;
LOG((CLOG_DEBUG2 "saved mouse position for next delta: %+d,%+d", x,y));
}
UInt32
@ -907,6 +916,8 @@ bool
CMSWindowsScreen::onPreDispatchPrimary(HWND,
UINT message, WPARAM wParam, LPARAM lParam)
{
LOG((CLOG_DEBUG2 "handling pre-dispatch primary"));
// handle event
switch (message) {
case SYNERGY_MSG_MARK:
@ -929,8 +940,7 @@ CMSWindowsScreen::onPreDispatchPrimary(HWND,
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);
saveMousePosition(static_cast<SInt32>(wParam), static_cast<SInt32>(lParam));
// we warped the mouse. discard events until we find the
// matching post warp event. see warpCursorNoFlush() for
@ -1272,6 +1282,14 @@ CMSWindowsScreen::onMouseButton(WPARAM wParam, LPARAM lParam)
return true;
}
// here's how mouse movements are sent across the network to a client:
// 1. synergy checks the mouse position on server screen
// 2. records the delta (current x,y minus last x,y)
// 3. records the current x,y as "last" (so we can calc delta next time)
// 4. on the server, puts the cursor back to the center of the screen
// - remember the cursor is hidden on the server at this point
// - this actually records the current x,y as "last" a second time (it seems)
// 5. sends the delta movement to the client (could be +1,+1 or -1,+4 for example)
bool
CMSWindowsScreen::onMouseMove(SInt32 mx, SInt32 my)
{
@ -1280,6 +1298,10 @@ CMSWindowsScreen::onMouseMove(SInt32 mx, SInt32 my)
SInt32 x = mx - m_xCursor;
SInt32 y = my - m_yCursor;
LOG((CLOG_DEBUG2
"handling mouse move; delta motion calc: %+d=(%+d - %+d),%+d=(%+d - %+d)",
x, mx, m_xCursor, 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)) {
@ -1287,19 +1309,24 @@ CMSWindowsScreen::onMouseMove(SInt32 mx, SInt32 my)
}
// save position to compute delta of next motion
m_xCursor = mx;
m_yCursor = my;
saveMousePosition(mx, my);
if (m_isOnScreen) {
// motion on primary screen
sendEvent(getMotionOnPrimaryEvent(),
CMotionInfo::alloc(m_xCursor, m_yCursor));
sendEvent(
getMotionOnPrimaryEvent(),
CMotionInfo::alloc(m_xCursor, m_yCursor));
}
else {
// motion on secondary screen. warp mouse back to
// center.
else
{
// the motion is on the secondary screen, so we warp mouse back to
// center on the server screen. if we don't do this, then the mouse
// will always try to return to the original entry point on the
// secondary screen.
LOG((CLOG_DEBUG2 "warping server cursor to center: %+d,%+d", m_xCenter, m_yCenter));
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
@ -1310,7 +1337,8 @@ CMSWindowsScreen::onMouseMove(SInt32 mx, SInt32 my)
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));
LOG((CLOG_DEBUG "dropped bogus delta motion: %+d,%+d", x, y));
}
else {
// send motion
@ -1386,6 +1414,8 @@ CMSWindowsScreen::onDisplayChange()
if (m_isPrimary) {
// warp mouse to center if off screen
if (!m_isOnScreen) {
LOG((CLOG_DEBUG1 "warping cursor to center: %+d, %+d", m_xCenter, m_yCenter));
warpCursor(m_xCenter, m_yCenter);
}
@ -1435,6 +1465,24 @@ CMSWindowsScreen::warpCursorNoFlush(SInt32 x, SInt32 y)
// between the previous message and the following message.
SetCursorPos(x, y);
// check to see if the mouse pos was set correctly
POINT cursorPos;
GetCursorPos(&cursorPos);
if ((cursorPos.x != x) && (cursorPos.y != y)) {
LOG((CLOG_DEBUG "SetCursorPos did not work; using fakeMouseMove instead"));
// when at Vista/7 login screen, SetCursorPos does not work (which could be
// an MS security feature). instead we can use fakeMouseMove, which calls
// mouse_event.
// IMPORTANT: as of implementing this function, it has an annoying side
// effect; instead of the mouse returning to the correct exit point, it
// returns to the center of the screen. this could have something to do with
// the center screen warping technique used (see comments for onMouseMove
// definition).
fakeMouseMove(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

View File

@ -303,6 +303,9 @@ private:
MOUSEKEYS m_oldMouseKeys;
static CMSWindowsScreen* s_screen;
// save last position of mouse to compute next delta movement
void saveMousePosition(SInt32 x, SInt32 y);
};
#endif