bool
CXWindowsScreenSaver::handleXEvent(const XEvent* xevent)
{
switch (xevent->type) {
case CreateNotify:
if (m_xscreensaver == None) {
if (isXScreenSaver(xevent->xcreatewindow.window)) {
// found the xscreensaver
setXScreenSaver(xevent->xcreatewindow.window);
}
else {
// another window to watch. to detect the xscreensaver
// window we look for a property but that property may
// not yet exist by the time we get this event so we
// have to watch the window for property changes.
// this would be so much easier if xscreensaver did the
// smart thing and stored its window in a property on
// the root window.
addWatchXScreenSaver(xevent->xcreatewindow.window);
}
}
break;
case DestroyNotify:
if (xevent->xdestroywindow.window == m_xscreensaver) {
// xscreensaver is gone
LOG((CLOG_DEBUG "xscreensaver died"));
setXScreenSaver(None);
return true;
}
break;
case PropertyNotify:
if (xevent->xproperty.state == PropertyNewValue) {
if (isXScreenSaver(xevent->xproperty.window)) {
// found the xscreensaver
setXScreenSaver(xevent->xcreatewindow.window);
}
}
break;
case MapNotify:
if (xevent->xmap.window == m_xscreensaver) {
// xscreensaver has activated
setXScreenSaverActive(true);
return true;
}
break;
case UnmapNotify:
if (xevent->xunmap.window == m_xscreensaver) {
// xscreensaver has deactivated
setXScreenSaverActive(false);
return true;
}
break;
}
return false;
}
bool
CXWindowsScreenSaver::findXScreenSaver()
{
// do nothing if we've already got the xscreensaver window
if (m_xscreensaver == None) {
// find top-level window xscreensaver window
Window root = DefaultRootWindow(m_display);
Window rw, pw, *cw;
unsigned int nc;
if (XQueryTree(m_display, root, &rw, &pw, &cw, &nc)) {
for (unsigned int i = 0; i < nc; ++i) {
if (isXScreenSaver(cw[i])) {
setXScreenSaver(cw[i]);
break;
}
}
XFree(cw);
}
}
return (m_xscreensaver != None);
}
CXWindowsScreenSaver::CXWindowsScreenSaver(
Display* display, Window window, void* eventTarget, IEventQueue* events) :
m_display(display),
m_xscreensaverSink(window),
m_eventTarget(eventTarget),
m_xscreensaver(None),
m_xscreensaverActive(false),
m_dpms(false),
m_disabled(false),
m_suppressDisable(false),
m_disableTimer(NULL),
m_disablePos(0),
m_events(events)
{
// get atoms
m_atomScreenSaver = XInternAtom(m_display,
"SCREENSAVER", False);
m_atomScreenSaverVersion = XInternAtom(m_display,
"_SCREENSAVER_VERSION", False);
m_atomScreenSaverActivate = XInternAtom(m_display,
"ACTIVATE", False);
m_atomScreenSaverDeactivate = XInternAtom(m_display,
"DEACTIVATE", False);
// check for DPMS extension. this is an alternative screen saver
// that powers down the display.
#if HAVE_X11_EXTENSIONS_DPMS_H
int eventBase, errorBase;
if (DPMSQueryExtension(m_display, &eventBase, &errorBase)) {
if (DPMSCapable(m_display)) {
// we have DPMS
m_dpms = true;
}
}
#endif
// watch top-level windows for changes
bool error = false;
{
CXWindowsUtil::CErrorLock lock(m_display, &error);
Window root = DefaultRootWindow(m_display);
XWindowAttributes attr;
XGetWindowAttributes(m_display, root, &attr);
m_rootEventMask = attr.your_event_mask;
XSelectInput(m_display, root, m_rootEventMask | SubstructureNotifyMask);
}
if (error) {
LOG((CLOG_DEBUG "didn't set root event mask"));
m_rootEventMask = 0;
}
// get the built-in settings
XGetScreenSaver(m_display, &m_timeout, &m_interval,
&m_preferBlanking, &m_allowExposures);
// get the DPMS settings
m_dpmsEnabled = isDPMSEnabled();
// get the xscreensaver window, if any
if (!findXScreenSaver()) {
setXScreenSaver(None);
}
// install disable timer event handler
m_events->adoptHandler(CEvent::kTimer, this,
new TMethodEventJob<CXWindowsScreenSaver>(this,
&CXWindowsScreenSaver::handleDisableTimer));
}
CXWindowsScreenSaver::CXWindowsScreenSaver(
CXWindowsScreen* screen, Display* display) :
m_screen(screen),
m_display(display),
m_notify(None),
m_xscreensaver(None),
m_xscreensaverActive(false),
m_disabled(false),
m_suppressDisable(false),
m_disableJobInstalled(false)
{
// screen saver disable callback
m_disableJob = new TMethodJob<CXWindowsScreenSaver>(this,
&CXWindowsScreenSaver::disableCallback);
// get atoms
m_atomScreenSaver = XInternAtom(m_display,
"SCREENSAVER", False);
m_atomScreenSaverVersion = XInternAtom(m_display,
"_SCREENSAVER_VERSION", False);
m_atomScreenSaverActivate = XInternAtom(m_display,
"ACTIVATE", False);
m_atomScreenSaverDeactivate = XInternAtom(m_display,
"DEACTIVATE", False);
m_atomSynergyScreenSaver = XInternAtom(m_display,
"SYNERGY_SCREENSAVER", False);
// create dummy window to receive xscreensaver responses. this
// shouldn't be necessary (we should be able to send responses
// to None) but it doesn't hurt.
XSetWindowAttributes attr;
attr.event_mask = 0;//PropertyChangeMask;
attr.do_not_propagate_mask = 0;
attr.override_redirect = True;
m_xscreensaverSink = XCreateWindow(m_display,
DefaultRootWindow(m_display),
0, 0, 1, 1, 0, 0,
InputOnly, CopyFromParent,
CWDontPropagate | CWEventMask |
CWOverrideRedirect,
&attr);
LOG((CLOG_DEBUG "xscreensaver sink window is 0x%08x", m_xscreensaverSink));
// watch top-level windows for changes
{
bool error = false;
CXWindowsUtil::CErrorLock lock(m_display, &error);
Window root = DefaultRootWindow(m_display);
XWindowAttributes attr;
XGetWindowAttributes(m_display, root, &attr);
m_rootEventMask = attr.your_event_mask;
XSelectInput(m_display, root, m_rootEventMask | SubstructureNotifyMask);
if (error) {
LOG((CLOG_DEBUG "didn't set root event mask"));
m_rootEventMask = 0;
}
}
// get the xscreensaver window, if any
if (!findXScreenSaver()) {
setXScreenSaver(None);
}
// get the built-in settings
XGetScreenSaver(m_display, &m_timeout, &m_interval,
&m_preferBlanking, &m_allowExposures);
}
