447 lines
11 KiB
C++
447 lines
11 KiB
C++
#include "CXWindowsScreenSaver.h"
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#include "CXWindowsScreen.h"
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#include "CXWindowsUtil.h"
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#include "CLog.h"
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#include "TMethodJob.h"
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#include <X11/Xatom.h>
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#if defined(HAVE_X11_EXTENSIONS_XTEST_H)
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# include <X11/extensions/XTest.h>
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#else
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# error The XTest extension is required to build synergy
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#endif
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//
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// CXWindowsScreenSaver
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//
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CXWindowsScreenSaver::CXWindowsScreenSaver(
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CXWindowsScreen* screen, Display* display) :
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m_screen(screen),
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m_display(display),
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m_notify(None),
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m_xscreensaver(None),
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m_xscreensaverActive(false),
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m_disabled(false)
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{
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// screen saver disable callback
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m_disableJob = new TMethodJob<CXWindowsScreenSaver>(this,
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&CXWindowsScreenSaver::disableCallback);
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// get atoms
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m_atomScreenSaver = XInternAtom(m_display,
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"SCREENSAVER", False);
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m_atomScreenSaverVersion = XInternAtom(m_display,
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"_SCREENSAVER_VERSION", False);
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m_atomScreenSaverActivate = XInternAtom(m_display,
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"ACTIVATE", False);
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m_atomScreenSaverDeactivate = XInternAtom(m_display,
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"DEACTIVATE", False);
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// create dummy window to receive xscreensaver responses. this
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// shouldn't be necessary (we should be able to send responses
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// to None) but it doesn't hurt.
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XSetWindowAttributes attr;
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attr.event_mask = 0;//PropertyChangeMask;
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attr.do_not_propagate_mask = 0;
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attr.override_redirect = True;
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m_xscreensaverSink = XCreateWindow(m_display,
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DefaultRootWindow(m_display),
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0, 0, 1, 1, 0, 0,
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InputOnly, CopyFromParent,
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CWDontPropagate | CWEventMask |
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CWOverrideRedirect,
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&attr);
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log((CLOG_DEBUG "xscreensaver sink window is 0x%08x", m_xscreensaverSink));
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// watch top-level windows for changes
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{
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bool error = false;
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CXWindowsUtil::CErrorLock lock(m_display, &error);
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Window root = DefaultRootWindow(m_display);
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XWindowAttributes attr;
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XGetWindowAttributes(m_display, root, &attr);
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m_rootEventMask = attr.your_event_mask;
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XSelectInput(m_display, root, m_rootEventMask | SubstructureNotifyMask);
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if (error) {
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log((CLOG_DEBUG "didn't set root event mask"));
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m_rootEventMask = 0;
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}
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}
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// get the xscreensaver window, if any
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if (!findXScreenSaver()) {
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setXScreenSaver(None);
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}
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// get the built-in settings
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XGetScreenSaver(m_display, &m_timeout, &m_interval,
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&m_preferBlanking, &m_allowExposures);
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}
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CXWindowsScreenSaver::~CXWindowsScreenSaver()
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{
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// clear watch list
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clearWatchForXScreenSaver();
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// stop watching root for events
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CXWindowsUtil::CErrorLock lock(m_display);
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Window root = DefaultRootWindow(m_display);
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XSelectInput(m_display, root, m_rootEventMask);
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// destroy dummy sink window
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XDestroyWindow(m_display, m_xscreensaverSink);
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// done with disable job
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m_screen->removeTimer(m_disableJob);
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delete m_disableJob;
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}
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bool
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CXWindowsScreenSaver::processEvent(XEvent* xevent)
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{
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switch (xevent->type) {
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case CreateNotify:
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if (m_xscreensaver == None) {
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if (isXScreenSaver(xevent->xcreatewindow.window)) {
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// found the xscreensaver
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setXScreenSaver(xevent->xcreatewindow.window);
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}
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else {
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// another window to watch. to detect the xscreensaver
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// window we look for a property but that property may
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// not yet exist by the time we get this event so we
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// have to watch the window for property changes.
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// this would be so much easier if xscreensaver did the
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// smart thing and stored its window in a property on
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// the root window.
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addWatchXScreenSaver(xevent->xcreatewindow.window);
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}
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}
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break;
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case DestroyNotify:
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if (xevent->xdestroywindow.window == m_xscreensaver) {
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// xscreensaver is gone
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log((CLOG_DEBUG "xscreensaver died"));
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setXScreenSaver(None);
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return true;
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}
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break;
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case PropertyNotify:
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if (xevent->xproperty.state == PropertyNewValue) {
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if (isXScreenSaver(xevent->xproperty.window)) {
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// found the xscreensaver
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setXScreenSaver(xevent->xcreatewindow.window);
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}
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}
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break;
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case MapNotify:
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if (xevent->xmap.window == m_xscreensaver) {
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// xscreensaver has activated
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setXScreenSaverActive(true);
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return true;
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}
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break;
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case UnmapNotify:
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if (xevent->xunmap.window == m_xscreensaver) {
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// xscreensaver has deactivated
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setXScreenSaverActive(false);
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return true;
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}
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break;
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}
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return false;
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}
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void
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CXWindowsScreenSaver::setNotify(Window notify)
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{
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m_notify = notify;
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}
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void
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CXWindowsScreenSaver::enable()
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{
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// for xscreensaver
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m_disabled = false;
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m_screen->removeTimer(m_disableJob);
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// for built-in X screen saver
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XSetScreenSaver(m_display, m_timeout, m_interval,
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m_preferBlanking, m_allowExposures);
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}
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void
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CXWindowsScreenSaver::disable()
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{
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// for xscreensaver. 5 seconds should be plenty often to
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// suppress the screen saver.
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m_disabled = true;
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m_screen->addTimer(m_disableJob, 5.0);
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// use built-in X screen saver
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XGetScreenSaver(m_display, &m_timeout, &m_interval,
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&m_preferBlanking, &m_allowExposures);
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XSetScreenSaver(m_display, 0, m_interval,
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m_preferBlanking, m_allowExposures);
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// FIXME -- now deactivate?
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}
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void
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CXWindowsScreenSaver::activate()
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{
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// remove disable job timer
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if (m_disabled) {
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m_screen->removeTimer(m_disableJob);
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}
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// try xscreensaver
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findXScreenSaver();
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if (m_xscreensaver != None) {
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sendXScreenSaverCommand(m_atomScreenSaverActivate);
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return;
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}
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// use built-in X screen saver
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XForceScreenSaver(m_display, ScreenSaverActive);
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}
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void
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CXWindowsScreenSaver::deactivate()
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{
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// reinstall disable job timer
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if (m_disabled) {
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m_screen->addTimer(m_disableJob, 5.0);
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}
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// try xscreensaver
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findXScreenSaver();
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if (m_xscreensaver != None) {
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sendXScreenSaverCommand(m_atomScreenSaverDeactivate);
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return;
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}
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// use built-in X screen saver
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XForceScreenSaver(m_display, ScreenSaverReset);
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}
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bool
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CXWindowsScreenSaver::isActive() const
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{
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// check xscreensaver
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if (m_xscreensaver != None) {
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return m_xscreensaverActive;
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}
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// can't check built-in X screen saver activity
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return false;
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}
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void
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CXWindowsScreenSaver::sendNotify(bool activated)
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{
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if (m_notify != None) {
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XEvent event;
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event.xclient.type = ClientMessage;
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event.xclient.display = m_display;
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event.xclient.window = m_notify;
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event.xclient.message_type = m_atomScreenSaver;
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event.xclient.format = 32;
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event.xclient.data.l[0] = activated ? 1 : 0;
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event.xclient.data.l[1] = 0;
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event.xclient.data.l[2] = 0;
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event.xclient.data.l[3] = 0;
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event.xclient.data.l[4] = 0;
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CXWindowsUtil::CErrorLock lock(m_display);
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XSendEvent(m_display, m_notify, False, 0, &event);
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}
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}
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bool
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CXWindowsScreenSaver::findXScreenSaver()
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{
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// do nothing if we've already got the xscreensaver window
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if (m_xscreensaver == None) {
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// find top-level window xscreensaver window
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Window root = DefaultRootWindow(m_display);
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Window rw, pw, *cw;
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unsigned int nc;
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if (XQueryTree(m_display, root, &rw, &pw, &cw, &nc)) {
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for (unsigned int i = 0; i < nc; ++i) {
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if (isXScreenSaver(cw[i])) {
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setXScreenSaver(cw[i]);
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break;
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}
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}
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XFree(cw);
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}
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}
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return (m_xscreensaver != None);
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}
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void
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CXWindowsScreenSaver::setXScreenSaver(Window window)
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{
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log((CLOG_DEBUG "xscreensaver window: 0x%08x", window));
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// save window
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m_xscreensaver = window;
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if (m_xscreensaver != None) {
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// clear old watch list
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clearWatchForXScreenSaver();
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// see if xscreensaver is active
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bool error = false;
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CXWindowsUtil::CErrorLock lock(m_display, &error);
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XWindowAttributes attr;
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XGetWindowAttributes(m_display, m_xscreensaver, &attr);
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setXScreenSaverActive(!error && attr.map_state != IsUnmapped);
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}
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else {
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// screen saver can't be active if it doesn't exist
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setXScreenSaverActive(false);
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// start watching for xscreensaver
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watchForXScreenSaver();
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}
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}
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bool
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CXWindowsScreenSaver::isXScreenSaver(Window w) const
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{
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// check for m_atomScreenSaverVersion string property
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Atom type;
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return (CXWindowsUtil::getWindowProperty(m_display, w,
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m_atomScreenSaverVersion,
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NULL, &type, NULL, False) &&
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type == XA_STRING);
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}
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void
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CXWindowsScreenSaver::setXScreenSaverActive(bool activated)
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{
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if (m_xscreensaverActive != activated) {
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log((CLOG_DEBUG "xscreensaver %s", activated ? "activated" : "deactivated"));
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m_xscreensaverActive = activated;
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sendNotify(activated);
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}
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}
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void
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CXWindowsScreenSaver::sendXScreenSaverCommand(Atom cmd, long arg1, long arg2)
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{
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XEvent event;
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event.xclient.type = ClientMessage;
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event.xclient.display = m_display;
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event.xclient.window = m_xscreensaverSink;
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event.xclient.message_type = m_atomScreenSaver;
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event.xclient.format = 32;
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event.xclient.data.l[0] = static_cast<long>(cmd);
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event.xclient.data.l[1] = arg1;
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event.xclient.data.l[2] = arg2;
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event.xclient.data.l[3] = 0;
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event.xclient.data.l[4] = 0;
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log((CLOG_DEBUG "send xscreensaver command: %d %d %d", (long)cmd, arg1, arg2));
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bool error = false;
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CXWindowsUtil::CErrorLock lock(m_display, &error);
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XSendEvent(m_display, m_xscreensaver, False, 0, &event);
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if (error) {
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findXScreenSaver();
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}
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}
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void
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CXWindowsScreenSaver::watchForXScreenSaver()
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{
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// clear old watch list
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clearWatchForXScreenSaver();
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// add every child of the root to the list of windows to watch
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Window root = DefaultRootWindow(m_display);
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Window rw, pw, *cw;
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unsigned int nc;
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if (XQueryTree(m_display, root, &rw, &pw, &cw, &nc)) {
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for (unsigned int i = 0; i < nc; ++i) {
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addWatchXScreenSaver(cw[i]);
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}
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XFree(cw);
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}
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// now check for xscreensaver window in case it set the property
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// before we could request property change events.
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if (findXScreenSaver()) {
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// found it so clear out our watch list
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clearWatchForXScreenSaver();
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}
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}
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void
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CXWindowsScreenSaver::clearWatchForXScreenSaver()
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{
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// stop watching all windows
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CXWindowsUtil::CErrorLock lock(m_display);
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for (CWatchList::iterator index = m_watchWindows.begin();
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index != m_watchWindows.end(); ++index) {
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XSelectInput(m_display, index->first, index->second);
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}
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m_watchWindows.clear();
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}
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void
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CXWindowsScreenSaver::addWatchXScreenSaver(Window window)
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{
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bool error = false;
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CXWindowsUtil::CErrorLock lock(m_display, &error);
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// get window attributes
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XWindowAttributes attr;
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XGetWindowAttributes(m_display, window, &attr);
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// if successful and window uses override_redirect (like xscreensaver
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// does) then watch it for property changes.
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if (!error && attr.override_redirect == True) {
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XSelectInput(m_display, window,
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attr.your_event_mask | PropertyChangeMask);
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if (!error) {
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// if successful then add the window to our list
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m_watchWindows.insert(std::make_pair(window, attr.your_event_mask));
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}
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}
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}
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void
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CXWindowsScreenSaver::disableCallback(void*)
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{
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// send fake mouse motion directly to xscreensaver
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if (m_xscreensaver != None) {
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XEvent event;
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event.xmotion.type = MotionNotify;
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event.xmotion.display = m_display;
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event.xmotion.window = m_xscreensaver;
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event.xmotion.root = DefaultRootWindow(m_display);
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event.xmotion.subwindow = None;
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event.xmotion.time = CurrentTime;
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event.xmotion.x = 0;
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event.xmotion.y = 0;
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event.xmotion.x_root = 0;
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event.xmotion.y_root = 0;
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event.xmotion.state = 0;
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event.xmotion.is_hint = NotifyNormal;
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event.xmotion.same_screen = True;
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CXWindowsUtil::CErrorLock lock(m_display);
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XSendEvent(m_display, m_xscreensaver, False, 0, &event);
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}
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// force screen saver off and reset the timer
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XForceScreenSaver(m_display, ScreenSaverReset);
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}
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