barrier/platform/CXWindowsScreenSaver.h

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#ifndef CXWINDOWSSCREENSAVER_H
#define CXWINDOWSSCREENSAVER_H
#include "IScreenSaver.h"
#include "stdmap.h"
#if defined(X_DISPLAY_MISSING)
# error X11 is required to build synergy
#else
# include <X11/Xlib.h>
#endif
class IJob;
class CXWindowsScreen;
//! X11 screen saver implementation
class CXWindowsScreenSaver : public IScreenSaver {
public:
// note -- the caller must ensure that Display* passed to c'tor isn't
// being used in another call to Xlib when calling any method on this
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// object (including during the c'tor and d'tor).
CXWindowsScreenSaver(CXWindowsScreen*, Display*);
virtual ~CXWindowsScreenSaver();
//! @name manipulators
//@{
//! Event filtering
/*!
Called for each event before event translation and dispatch. Return
true to skip translation and dispatch. Subclasses should call the
superclass's version first and return true if it returns true.
*/
bool onPreDispatch(const XEvent*);
//! Set notify target
/*!
Tells this object to send a ClientMessage to the given window
when the screen saver activates or deactivates. Only one window
can be notified at a time. The message type is the "SCREENSAVER"
atom, the format is 32, and the data.l[0] member is non-zero
if activated, zero if deactivated. Pass None to disable
notification.
*/
void setNotify(Window);
//@}
// IScreenSaver overrides
virtual void enable();
virtual void disable();
virtual void activate();
virtual void deactivate();
virtual bool isActive() const;
private:
// send a notification
void sendNotify(bool activated);
// find and set the running xscreensaver's window. returns true iff
// found.
bool findXScreenSaver();
// set the xscreensaver's window, updating the activation state flag
void setXScreenSaver(Window);
// returns true if the window appears to be the xscreensaver window
bool isXScreenSaver(Window) const;
// set xscreensaver's activation state flag. sends notification
// if the state has changed.
void setXScreenSaverActive(bool activated);
// send a command to xscreensaver
void sendXScreenSaverCommand(Atom, long = 0, long = 0);
// watch all windows that could potentially be the xscreensaver for
// the events that will confirm it.
void watchForXScreenSaver();
// stop watching all watched windows
void clearWatchForXScreenSaver();
// add window to the watch list
void addWatchXScreenSaver(Window window);
// called periodically to prevent the screen saver from starting
void disableCallback(void*);
private:
typedef std::map<Window, long> CWatchList;
// the event loop object
CXWindowsScreen* m_screen;
// the X display
Display* m_display;
// old event mask on root window
long m_rootEventMask;
// window to notify on screen saver activation/deactivation
Window m_notify;
// xscreensaver's window
Window m_xscreensaver;
// xscreensaver activation state
bool m_xscreensaverActive;
// dummy window to receive xscreensaver repsonses
Window m_xscreensaverSink;
// potential xscreensaver windows being watched
CWatchList m_watchWindows;
// atoms used to communicate with xscreensaver's window
Atom m_atomScreenSaver;
Atom m_atomScreenSaverVersion;
Atom m_atomScreenSaverActivate;
Atom m_atomScreenSaverDeactivate;
// built-in screen saver settings
int m_timeout;
int m_interval;
int m_preferBlanking;
int m_allowExposures;
// true iff the disabled job timer is installed
bool m_disabled;
// the job used to invoke disableCallback
IJob* m_disableJob;
};
#endif