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a4a08c3ce6
screen saver from activating. It was unnecessary since the built-in screen saver is disabled as appropriate; this call was just to ensure that the screen saver wouldn't start if an external program reactivated the screen saver after synergy disabled it. It's possible that this was causing screen flicker under gnome, though i don't know why. It's also possible that periodically sending events to xscreensaver is causing the flicker but removing that code is more difficult because xscreensaver can't be disabled, only deactivated or killed.
483 lines
12 KiB
C++
483 lines
12 KiB
C++
/*
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* synergy -- mouse and keyboard sharing utility
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* Copyright (C) 2002 Chris Schoeneman
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*
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* This package is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* found in the file COPYING that should have accompanied this file.
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*
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* This package is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#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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m_suppressDisable(false),
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m_disableJobInstalled(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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m_atomSynergyScreenSaver = XInternAtom(m_display,
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"SYNERGY_SCREENSAVER", 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::onPreDispatch(const 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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updateDisableJob();
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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
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m_disabled = true;
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updateDisableJob();
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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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m_suppressDisable = true;
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updateDisableJob();
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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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m_suppressDisable = false;
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updateDisableJob();
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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_atomSynergyScreenSaver;
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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 on window 0x%08x", activated ? "activated" : "deactivated", m_xscreensaver));
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m_xscreensaverActive = activated;
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// if screen saver was activated forcefully (i.e. against
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// our will) then just accept it. don't try to keep it
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// from activating since that'll just pop up the password
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// dialog if locking is enabled.
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m_suppressDisable = activated;
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updateDisableJob();
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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::updateDisableJob()
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{
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assert(m_disableJob != NULL);
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if (m_disabled && !m_suppressDisable && !m_disableJobInstalled) {
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// 5 seconds should be plenty often to suppress the screen saver
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m_disableJobInstalled = true;
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m_screen->addTimer(m_disableJob, 5.0);
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}
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else if ((!m_disabled || m_suppressDisable) && m_disableJobInstalled) {
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m_disableJobInstalled = false;
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m_screen->removeTimer(m_disableJob);
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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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}
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