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the apps still exit but they do it in a mostly controlled manner. in particular, the server threads except the one processing primary screen events will terminate gracefully. this will be important should the server ever allow HTTP clients to rewrite the configuration file. note that X makes it effectively impossible to continue once the X server disconnects. even if it didn't it would be difficult for synergy to recover. users will have to add synergy to the X display manager's startup script if they expect the server to be restarted. alternatively, we could add code to fork synergy at startup; the child would do the normal work while the parent would simply wait for the child to exit and restart it.
123 lines
3.4 KiB
C++
123 lines
3.4 KiB
C++
#ifndef CXWINDOWSSCREEN_H
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#define CXWINDOWSSCREEN_H
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#include "BasicTypes.h"
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#include "ClipboardTypes.h"
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#include "CMutex.h"
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#include <X11/Xlib.h>
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class IClipboard;
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class CXWindowsClipboard;
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class CXWindowsScreen {
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public:
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CXWindowsScreen();
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virtual ~CXWindowsScreen();
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protected:
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class CDisplayLock {
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public:
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CDisplayLock(const CXWindowsScreen*);
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~CDisplayLock();
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operator Display*() const;
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private:
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const CMutex* m_mutex;
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Display* m_display;
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};
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friend class CDisplayLock;
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// open the X display. calls onOpenDisplay() after opening the display,
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// getting the screen, its size, and root window. then it starts the
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// event thread.
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void openDisplay();
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// destroy the window and close the display. calls onCloseDisplay()
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// after the event thread has been shut down but before the display
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// is closed.
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void closeDisplay();
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// get the opened screen, its size, its root window. to get the
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// display create a CDisplayLock object passing this. while the
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// object exists no other threads may access the display. do not
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// save the Display* beyond the lifetime of the CDisplayLock.
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int getScreen() const;
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void getScreenSize(SInt32* w, SInt32* h) const;
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Window getRoot() const;
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// create a cursor that is transparent everywhere
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Cursor createBlankCursor() const;
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// wait for and get the next X event. cancellable.
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bool getEvent(XEvent*) const;
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// cause getEvent() to return false immediately and forever after.
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// the caller must have locked the display.
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void doStop();
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// set the contents of the clipboard (i.e. primary selection)
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bool setDisplayClipboard(ClipboardID,
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const IClipboard* clipboard);
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// copy the clipboard contents to clipboard
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bool getDisplayClipboard(ClipboardID,
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IClipboard* clipboard) const;
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// called by openDisplay() to allow subclasses to prepare the display.
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// the display is locked and passed to the subclass.
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virtual void onOpenDisplay(Display*) = 0;
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// called by openDisplay() after onOpenDisplay() to create each clipboard
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virtual CXWindowsClipboard*
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createClipboard(ClipboardID) = 0;
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// called by closeDisplay() to allow subclasses to clean up the display.
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// the display is locked and passed to the subclass. note that the
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// display may be NULL if the display has unexpectedly disconnected.
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virtual void onCloseDisplay(Display*) = 0;
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// called if the display is unexpectedly closing. default does nothing.
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virtual void onUnexpectedClose();
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// called when a clipboard is lost
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virtual void onLostClipboard(ClipboardID) = 0;
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private:
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// internal event processing
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bool processEvent(XEvent*);
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// determine the clipboard from the X selection. returns
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// kClipboardEnd if no such clipboard.
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ClipboardID getClipboardID(Atom selection) const;
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// continue processing a selection request
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void processClipboardRequest(Window window,
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Time time, Atom property);
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// terminate a selection request
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void destroyClipboardRequest(Window window);
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// X I/O error handler
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static int ioErrorHandler(Display*);
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private:
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Display* m_display;
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int m_screen;
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Window m_root;
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SInt32 m_w, m_h;
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bool m_stop;
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// clipboards
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CXWindowsClipboard* m_clipboard[kClipboardEnd];
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// X is not thread safe
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CMutex m_mutex;
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// pointer to (singleton) screen. this is only needed by
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// ioErrorHandler().
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static CXWindowsScreen* s_screen;
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};
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#endif
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