1 files changed, 169 insertions, 0 deletions
diff --git a/src/lib/platform/XWindowsScreenSaver.h b/src/lib/platform/XWindowsScreenSaver.h
new file mode 100644
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--- /dev/null
+++ b/src/lib/platform/XWindowsScreenSaver.h
@@ -0,0 +1,169 @@
+/*
+ * barrier -- mouse and keyboard sharing utility
+ * Copyright (C) 2012-2016 Symless Ltd.
+ * Copyright (C) 2002 Chris Schoeneman
+ * 
+ * This package is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * found in the file LICENSE that should have accompanied this file.
+ * 
+ * This package is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "barrier/IScreenSaver.h"
+#include "base/IEventQueue.h"
+#include "common/stdmap.h"
+
+#if X_DISPLAY_MISSING
+#    error X11 is required to build barrier
+#else
+#    include <X11/Xlib.h>
+#endif
+
+class Event;
+class EventQueueTimer;
+
+//! X11 screen saver implementation
+class XWindowsScreenSaver : public IScreenSaver {
+public:
+    XWindowsScreenSaver(Display*, Window, void* eventTarget, IEventQueue* events);
+    virtual ~XWindowsScreenSaver();
+
+    //! @name manipulators
+    //@{
+
+    //! Event filtering
+    /*!
+    Should be called for each system event before event translation and
+    dispatch.  Returns true to skip translation and dispatch.
+    */
+    bool                handleXEvent(const XEvent*);
+
+    //! Destroy without the display
+    /*!
+    Tells this object to delete itself without using the X11 display.
+    It may leak some resources as a result.
+    */
+    void                destroy();
+
+    //@}
+
+    // IScreenSaver overrides
+    virtual void        enable();
+    virtual void        disable();
+    virtual void        activate();
+    virtual void        deactivate();
+    virtual bool        isActive() const;
+
+private:
+    // 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);
+
+    // install/uninstall the job used to suppress the screensaver
+    void                updateDisableTimer();
+
+    // called periodically to prevent the screen saver from starting
+    void                handleDisableTimer(const Event&, void*);
+
+    // force DPMS to activate or deactivate
+    void                activateDPMS(bool activate);
+
+    // enable/disable DPMS screen saver
+    void                enableDPMS(bool);
+
+    // check if DPMS is enabled
+    bool                isDPMSEnabled() const;
+
+    // check if DPMS is activate
+    bool                isDPMSActivated() const;
+
+private:
+    typedef std::map<Window, long> WatchList;
+
+    // the X display
+    Display*            m_display;
+
+    // window to receive xscreensaver repsonses
+    Window                m_xscreensaverSink;
+
+    // the target for the events we generate
+    void*                m_eventTarget;
+
+    // xscreensaver's window
+    Window                m_xscreensaver;
+
+    // xscreensaver activation state
+    bool                m_xscreensaverActive;
+
+    // old event mask on root window
+    long                m_rootEventMask;
+
+    // potential xscreensaver windows being watched
+    WatchList            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;
+
+    // DPMS screen saver settings
+    bool                m_dpms;
+    bool                m_dpmsEnabled;
+
+    // true iff the client wants the screen saver suppressed
+    bool                m_disabled;
+
+    // true iff we're ignoring m_disabled.  this is true, for example,
+    // when the client has called activate() and so presumably wants
+    // to activate the screen saver even if disabled.
+    bool                m_suppressDisable;
+
+    // the disable timer (NULL if not installed)
+    EventQueueTimer*    m_disableTimer;
+
+    // fake mouse motion position for suppressing the screen saver.
+    // xscreensaver since 2.21 requires the mouse to move more than 10
+    // pixels to be considered significant.
+    SInt32                m_disablePos;
+
+    IEventQueue*        m_events;
+};