void
CXWindowsScreenSaver::setXScreenSaver(Window window)
{
LOG((CLOG_DEBUG "xscreensaver window: 0x%08x", window));
// save window
m_xscreensaver = window;
if (m_xscreensaver != None) {
// clear old watch list
clearWatchForXScreenSaver();
// see if xscreensaver is active
bool error = false;
XWindowAttributes attr;
{
CXWindowsUtil::CErrorLock lock(m_display, &error);
XGetWindowAttributes(m_display, m_xscreensaver, &attr);
}
setXScreenSaverActive(!error && attr.map_state != IsUnmapped);
// save current DPMS state; xscreensaver may have changed it.
m_dpmsEnabled = isDPMSEnabled();
}
else {
// screen saver can't be active if it doesn't exist
setXScreenSaverActive(false);
// start watching for xscreensaver
watchForXScreenSaver();
}
}
void
CXWindowsScreenSaver::watchForXScreenSaver()
{
// clear old watch list
clearWatchForXScreenSaver();
// add every child of the root to the list of windows to watch
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) {
addWatchXScreenSaver(cw[i]);
}
XFree(cw);
}
// now check for xscreensaver window in case it set the property
// before we could request property change events.
if (findXScreenSaver()) {
// found it so clear out our watch list
clearWatchForXScreenSaver();
}
}
CXWindowsScreenSaver::~CXWindowsScreenSaver()
{
// done with disable job
if (m_disableTimer != NULL) {
m_events->deleteTimer(m_disableTimer);
}
m_events->removeHandler(CEvent::kTimer, this);
if (m_display != NULL) {
enableDPMS(m_dpmsEnabled);
XSetScreenSaver(m_display, m_timeout, m_interval,
m_preferBlanking, m_allowExposures);
clearWatchForXScreenSaver();
CXWindowsUtil::CErrorLock lock(m_display);
XSelectInput(m_display, DefaultRootWindow(m_display), m_rootEventMask);
}
}
CXWindowsScreenSaver::~CXWindowsScreenSaver()
{
// clear watch list
clearWatchForXScreenSaver();
// stop watching root for events
CXWindowsUtil::CErrorLock lock(m_display);
Window root = DefaultRootWindow(m_display);
XSelectInput(m_display, root, m_rootEventMask);
// destroy dummy sink window
XDestroyWindow(m_display, m_xscreensaverSink);
// done with disable job
m_screen->removeTimer(m_disableJob);
delete m_disableJob;
}
