barrier/platform/CXWindowsScreen.h

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#ifndef CXWINDOWSSCREEN_H
#define CXWINDOWSSCREEN_H
#include "IScreen.h"
#include "CMutex.h"
#include "CStopwatch.h"
#include "stdvector.h"
#if defined(X_DISPLAY_MISSING)
# error X11 is required to build synergy
#else
# include <X11/Xlib.h>
#endif
#include <algorithm>
#include <functional>
class IJob;
class IScreenEventHandler;
class IScreenReceiver;
class CXWindowsClipboard;
class CXWindowsScreenSaver;
// X11 event
class CEvent {
public:
XEvent m_event;
SInt32 m_result;
};
// X11 screen implementation
class CXWindowsScreen : public IScreen {
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public:
CXWindowsScreen(IScreenReceiver*, IScreenEventHandler*);
virtual ~CXWindowsScreen();
//! @name manipulators
//@{
//! Add timer
/*!
Add a job to invoke every timeout seconds. The job is
called with the display locked. If a job timeout expires twice
or more before the job can be called then the job is called
just once. The caller retains ownership of the job.
*/
void addTimer(IJob*, double timeout);
//! Remove timer
/*!
Remove a job. The caller retains ownership of the job.
*/
void removeTimer(IJob*);
//! Set window
/*!
Set the window (created by the subclass). This performs some
initialization and saves the window in case it's needed later.
*/
void setWindow(Window);
//@}
//! @name accessors
//@{
//! Get window
/*!
Returns the root window of the screen.
*/
Window getRoot() const;
//! Get transparent cursor
/*!
Returns a cursor that is transparent everywhere.
*/
Cursor getBlankCursor() const;
//@}
// IScreen overrides
void open();
void mainLoop();
void exitMainLoop();
void close();
bool setClipboard(ClipboardID, const IClipboard*);
void checkClipboards();
void openScreensaver(bool notify);
void closeScreensaver();
void screensaver(bool activate);
void syncDesktop();
bool getClipboard(ClipboardID, IClipboard*) const;
void getShape(SInt32&, SInt32&, SInt32&, SInt32&) const;
void getCursorPos(SInt32&, SInt32&) const;
void getCursorCenter(SInt32&, SInt32&) const;
private:
// update screen size cache
void updateScreenShape();
// process events before dispatching to receiver
bool onPreDispatch(CEvent* event);
// create the transparent cursor
void createBlankCursor();
// remove a timer without locking
void removeTimerNoLock(IJob*);
// process timers
bool processTimers();
// determine the clipboard from the X selection. returns
// kClipboardEnd if no such clipboard.
ClipboardID getClipboardID(Atom selection) const;
// continue processing a selection request
void processClipboardRequest(Window window,
Time time, Atom property);
// terminate a selection request
void destroyClipboardRequest(Window window);
// X I/O error handler
static int ioErrorHandler(Display*);
private:
// a priority queue will direct access to the elements
template <class T, class Container = std::vector<T>,
class Compare = std::greater<typename Container::value_type> >
class CPriorityQueue {
public:
typedef typename Container::value_type value_type;
typedef typename Container::size_type size_type;
typedef typename Container::iterator iterator;
typedef Container container_type;
CPriorityQueue() { }
CPriorityQueue(Container& swappedIn);
~CPriorityQueue() { }
// manipulators
void push(const value_type& v)
{
c.push_back(v);
std::push_heap(c.begin(), c.end(), comp);
}
void pop()
{
std::pop_heap(c.begin(), c.end(), comp);
c.pop_back();
}
iterator begin()
{
return c.begin();
}
iterator end()
{
return c.end();
}
void swap(CPriorityQueue<T, Container, Compare>& q)
{
c.swap(q.c);
}
void swap(Container& c2)
{
c.swap(c2);
std::make_heap(c.begin(), c.end(), comp);
}
// accessors
bool empty() const
{
return c.empty();
}
size_type size() const
{
return c.size();
}
const value_type&
top() const
{
return c.front();
}
private:
Container c;
Compare comp;
};
// a timer priority queue element
class CTimer {
public:
CTimer(IJob* job, double timeout);
~CTimer();
// manipulators
void run();
void reset();
CTimer& operator-=(double);
// accessors
IJob* getJob() const
{
return m_job;
}
operator double() const;
bool operator<(const CTimer&) const;
private:
IJob* m_job;
double m_timeout;
double m_time;
};
private:
friend class CDisplayLock;
typedef CPriorityQueue<CTimer> CTimerPriorityQueue;
// X is not thread safe
CMutex m_mutex;
Display* m_display;
Window m_root;
bool m_stop;
IScreenReceiver* m_receiver;
IScreenEventHandler* m_eventHandler;
Window m_window;
SInt32 m_x, m_y;
SInt32 m_w, m_h;
// clipboards
CXWindowsClipboard* m_clipboard[kClipboardEnd];
// the transparent cursor
Cursor m_cursor;
// screen saver stuff
CXWindowsScreenSaver* m_screensaver;
bool m_screensaverNotify;
Atom m_atomScreensaver;
// timers, the stopwatch used to time, and a mutex for the timers
CTimerPriorityQueue m_timers;
CStopwatch m_time;
CMutex m_timersMutex;
// pointer to (singleton) screen. this is only needed by
// ioErrorHandler().
static CXWindowsScreen* s_screen;
};
class CDisplayLock {
public:
CDisplayLock(const CXWindowsScreen*);
~CDisplayLock();
operator Display*() const;
private:
const CMutex* m_mutex;
Display* m_display;
};
#endif