x0vncserver: fix ghost cursor in zaphod mode (better version)

Resolves: bz#2119016
This commit is contained in:
Jan Grulich 2022-10-24 12:07:14 +02:00
parent 7a28c85f4d
commit d2b496f3dd
2 changed files with 124 additions and 1 deletions

View File

@ -0,0 +1,117 @@
From f783d5c8b567199178b6690f347e060a69d2aa36 Mon Sep 17 00:00:00 2001
From: Jan Grulich <jgrulich@redhat.com>
Date: Thu, 11 Aug 2022 13:15:29 +0200
Subject: [PATCH] x0vncserver: update/display cursor only on correct screen in
zaphod mode
We have to check whether we update cursor position/shape only in case
the cursor is on our display, otherwise in zaphod mode, ie. when having
two instances of x0vncserver on screens :0.0 and :0.1 we would be having
the cursor duplicated and actually not funcional (aka ghost cursor) as
it would be actually not present. We also additionally watch EnterNotify
and LeaveNotify events in order to show/hide cursor accordingly.
Change made with help from Olivier Fourdan <ofourdan@redhat.com>
---
unix/x0vncserver/XDesktop.cxx | 60 +++++++++++++++++++++++++++++++----
1 file changed, 53 insertions(+), 7 deletions(-)
diff --git a/unix/x0vncserver/XDesktop.cxx b/unix/x0vncserver/XDesktop.cxx
index f2046e43e..f07fd78bf 100644
--- a/unix/x0vncserver/XDesktop.cxx
+++ b/unix/x0vncserver/XDesktop.cxx
@@ -192,7 +192,8 @@ XDesktop::XDesktop(Display* dpy_, Geometry *geometry_)
RRScreenChangeNotifyMask | RRCrtcChangeNotifyMask);
/* Override TXWindow::init input mask */
XSelectInput(dpy, DefaultRootWindow(dpy),
- PropertyChangeMask | StructureNotifyMask | ExposureMask);
+ PropertyChangeMask | StructureNotifyMask |
+ ExposureMask | EnterWindowMask | LeaveWindowMask);
} else {
#endif
vlog.info("RANDR extension not present");
@@ -217,11 +218,13 @@ void XDesktop::poll() {
Window root, child;
int x, y, wx, wy;
unsigned int mask;
- XQueryPointer(dpy, DefaultRootWindow(dpy), &root, &child,
- &x, &y, &wx, &wy, &mask);
- x -= geometry->offsetLeft();
- y -= geometry->offsetTop();
- server->setCursorPos(rfb::Point(x, y), false);
+
+ if (XQueryPointer(dpy, DefaultRootWindow(dpy), &root, &child,
+ &x, &y, &wx, &wy, &mask)) {
+ x -= geometry->offsetLeft();
+ y -= geometry->offsetTop();
+ server->setCursorPos(rfb::Point(x, y), false);
+ }
}
}
@@ -253,7 +256,14 @@ void XDesktop::start(VNCServer* vs) {
#endif
#ifdef HAVE_XFIXES
- setCursor();
+ Window root, child;
+ int x, y, wx, wy;
+ unsigned int mask;
+ // Check whether the cursor is initially on our screen
+ if (XQueryPointer(dpy, DefaultRootWindow(dpy), &root, &child,
+ &x, &y, &wx, &wy, &mask))
+ setCursor();
+
#endif
server->setLEDState(ledState);
@@ -701,6 +711,15 @@ bool XDesktop::handleGlobalEvent(XEvent* ev) {
if (cev->subtype != XFixesDisplayCursorNotify)
return false;
+ Window root, child;
+ int x, y, wx, wy;
+ unsigned int mask;
+
+ // Check whether the cursor is initially on our screen
+ if (!XQueryPointer(dpy, DefaultRootWindow(dpy), &root, &child,
+ &x, &y, &wx, &wy, &mask))
+ return false;
+
return setCursor();
#endif
#ifdef HAVE_XRANDR
@@ -753,6 +772,33 @@ bool XDesktop::handleGlobalEvent(XEvent* ev) {
return true;
#endif
+#ifdef HAVE_XFIXES
+ } else if (ev->type == EnterNotify) {
+ XCrossingEvent* cev;
+
+ if (!running)
+ return true;
+
+ cev = (XCrossingEvent*)ev;
+
+ if (cev->window != cev->root)
+ return false;
+
+ return setCursor();
+ } else if (ev->type == LeaveNotify) {
+ XCrossingEvent* cev;
+
+ if (!running)
+ return true;
+
+ cev = (XCrossingEvent*)ev;
+
+ if (cev->window == cev->root)
+ return false;
+
+ server->setCursor(0, 0, Point(), NULL);
+ return true;
+#endif
}
return false;

View File

@ -5,7 +5,7 @@
Name: tigervnc Name: tigervnc
Version: 1.12.0 Version: 1.12.0
Release: 4%{?dist} Release: 5%{?dist}
Summary: A TigerVNC remote display system Summary: A TigerVNC remote display system
%global _hardened_build 1 %global _hardened_build 1
@ -29,6 +29,7 @@ Patch50: tigervnc-selinux-restore-context-in-case-of-different-policies.p
Patch51: tigervnc-fix-typo-in-mirror-monitor-detection.patch Patch51: tigervnc-fix-typo-in-mirror-monitor-detection.patch
Patch52: tigervnc-root-user-selinux-context.patch Patch52: tigervnc-root-user-selinux-context.patch
Patch53: tigervnc-vncsession-restore-script-systemd-service.patch Patch53: tigervnc-vncsession-restore-script-systemd-service.patch
Patch54: tigervnc-fix-ghost-cursor-in-zaphod-mode.patch
# This is tigervnc-%%{version}/unix/xserver116.patch rebased on the latest xorg # This is tigervnc-%%{version}/unix/xserver116.patch rebased on the latest xorg
Patch100: tigervnc-xserver120.patch Patch100: tigervnc-xserver120.patch
@ -167,6 +168,7 @@ popd
%patch51 -p1 -b .fix-typo-in-mirror-monitor-detection %patch51 -p1 -b .fix-typo-in-mirror-monitor-detection
%patch52 -p1 -b .root-user-selinux-context %patch52 -p1 -b .root-user-selinux-context
%patch53 -p1 -b .vncsession-restore-script-systemd-service %patch53 -p1 -b .vncsession-restore-script-systemd-service
%patch54 -p1 -b .fix-ghost-cursor-in-zaphod-mode
%build %build
%ifarch sparcv9 sparc64 s390 s390x %ifarch sparcv9 sparc64 s390 s390x
@ -345,6 +347,10 @@ fi
%ghost %verify(not md5 size mtime) %{_sharedstatedir}/selinux/%{selinuxtype}/active/modules/200/%{modulename} %ghost %verify(not md5 size mtime) %{_sharedstatedir}/selinux/%{selinuxtype}/active/modules/200/%{modulename}
%changelog %changelog
* Mon Oct 24 2022 Jan Grulich <jgrulich@redhat.com> - 1.12.0-5
- x0vncserver: fix ghost cursor in zaphod mode (better version)
Resolves: bz#2119016
* Tue May 31 2022 Jan Grulich <jgrulich@redhat.com> - 1.12.0-4 * Tue May 31 2022 Jan Grulich <jgrulich@redhat.com> - 1.12.0-4
- Add BR: libXdamage, libXfixes, libXrandr - Add BR: libXdamage, libXfixes, libXrandr
Resolves: bz#2091833 Resolves: bz#2091833