mirror of
https://github.com/debauchee/barrier.git
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327 lines
9.0 KiB
C++
327 lines
9.0 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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#ifndef CPRIMARYSCREEN_H
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#define CPRIMARYSCREEN_H
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#include "ClipboardTypes.h"
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#include "KeyTypes.h"
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#include "CMutex.h"
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class IClipboard;
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class IScreen;
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class IScreenReceiver;
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//! Generic server-side screen
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/*!
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This is a platform independent base class for primary screen
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implementations. A primary screen is a server-side screen.
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Each platform will derive a class from CPrimaryScreen to handle
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platform dependent operations.
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*/
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class CPrimaryScreen {
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public:
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CPrimaryScreen(IScreenReceiver*);
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virtual ~CPrimaryScreen();
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//! @name manipulators
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//@{
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//! Open screen
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/*!
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Opens the screen. This includes initializing the screen, opening
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the screen saver, synchronizing keyboard state, and causing events
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to be reported to an IPrimaryScreenReceiver (set through another
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interface). Calls close() before returning (rethrowing) if it
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fails for any reason.
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*/
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void open();
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//! Run event loop
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/*!
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Run the screen's event loop. This returns when it detects
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the application should terminate or when exitMainLoop() is called.
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mainLoop() may only be called between open() and close().
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*/
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void mainLoop();
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//! Exit event loop
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/*!
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Force mainLoop() to return. This call can return before
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mainLoop() does (i.e. asynchronously).
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*/
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void exitMainLoop();
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//! Close screen
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/*!
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Closes the screen. This close the screen saver and the screen.
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*/
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void close();
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//! Enter screen
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/*!
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Called when the user navigates to the primary screen. Warps
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the cursor to the absolute coordinates \c x,y and unhides
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it. If \c forScreensaver is true then we're entering because
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the screen saver started and the cursor is not warped.
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*/
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void enter(SInt32 x, SInt32 y, bool forScreensaver);
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//! Leave screen
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/*!
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Called when the user navigates off the primary screen. Returns
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true iff successful.
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*/
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bool leave();
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//! Update configuration
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/*!
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This is called when the configuration has changed. \c activeSides
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is a bitmask of EDirectionMask indicating which sides of the
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primary screen are linked to clients. Override to handle the
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possible change in jump zones.
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*/
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virtual void reconfigure(UInt32 activeSides) = 0;
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//! Warp cursor
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/*!
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Warp the cursor to the absolute coordinates \c x,y. Also
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discard input events up to and including the warp before
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returning.
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*/
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virtual void warpCursor(SInt32 x, SInt32 y) = 0;
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//! Set clipboard
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/*!
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Sets the system's clipboard contents. This is usually called
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soon after an enter().
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*/
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void setClipboard(ClipboardID, const IClipboard*);
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//! Grab clipboard
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/*!
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Grabs (i.e. take ownership of) the system clipboard.
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*/
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void grabClipboard(ClipboardID);
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//@}
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//! @name accessors
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//@{
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//! Test if active
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/*!
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Returns true iff the screen is active (i.e. the user has left
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the screen). Note this is the reverse of a secdonary screen.
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*/
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bool isActive() const;
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//! Get clipboard
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/*!
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Saves the contents of the system clipboard indicated by \c id.
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*/
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void getClipboard(ClipboardID, IClipboard*) const;
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//! Get jump zone size
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/*!
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Return the jump zone size, the size of the regions on the edges of
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the screen that cause the cursor to jump to another screen.
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*/
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virtual SInt32 getJumpZoneSize() const = 0;
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//! Get toggle key state
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/*!
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Return the primary screen's current toggle modifier key state.
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The returned mask should have the corresponding bit set for
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each toggle key that is active. For example, if caps lock is
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on then the returned mask should have \c KeyModifierCapsLock set.
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*/
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virtual KeyModifierMask getToggleMask() const = 0;
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//! Get screen lock state
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/*!
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Return true if any key or button is being pressed or if there's
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any other reason that the user should not be allowed to switch
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screens. Active toggle keys (including the scroll lock key)
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should not be counted as reasons to lock to the screen.
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*/
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virtual bool isLockedToScreen() const = 0;
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//! Get screen
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/*!
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Return the platform dependent screen.
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*/
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virtual IScreen* getScreen() const = 0;
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//@}
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protected:
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//! Pre-mainLoop() hook
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/*!
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Called on entry to mainLoop(). Override to perform platform specific
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operations. Default does nothing. May throw.
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*/
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virtual void onPreMainLoop();
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//! Post-mainLoop() hook
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/*!
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Called on exit from mainLoop(). Override to perform platform specific
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operations. Default does nothing. May \b not throw.
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*/
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virtual void onPostMainLoop();
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//! Pre-open() hook
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/*!
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Called on entry to open(). Override to perform platform specific
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operations. Default does nothing. May throw.
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*/
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virtual void onPreOpen();
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//! Post-open() hook
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/*!
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Called on exit from open() iff the open was successful. Default
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does nothing. May throw.
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*/
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virtual void onPostOpen();
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//! Pre-close() hook
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/*!
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Called on entry to close(). Override to perform platform specific
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operations. Default does nothing. May \b not throw.
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*/
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virtual void onPreClose();
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//! Post-close() hook
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/*!
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Called on exit from close(). Override to perform platform specific
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operations. Default does nothing. May \b not throw.
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*/
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virtual void onPostClose();
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//! Pre-enter() hook
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/*!
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Called from enter() after the cursor has been warped or, if
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\c forScreensaver is true, onEnterScreensaver() was called. Override
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to perform platform specific operations. Default does nothing. May
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\b not throw.
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*/
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virtual void onPreEnter();
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//! Post-enter() hook
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/*!
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Called on exit from enter(). Override to perform platform specific
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operations. Default does nothing. May \b not throw.
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*/
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virtual void onPostEnter();
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//! Pre-enter() for screen saver hook
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/*!
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Called on entry to enter() if the \c forScreensaver passed to it was
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true. Override to perform platform specific operations. Default
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does nothing. May \b not throw.
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*/
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virtual void onEnterScreensaver();
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//! Pre-leave() hook
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/*!
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Called on entry to leave() after desktop synchronization. Override
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to perform platform specific operations. Default does nothing. May
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\b not throw.
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*/
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virtual void onPreLeave();
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//! Post-leave() hook
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/*!
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Called on exit from leave(). \c success is the value returned by
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showWindow(). Override to perform platform specific operations.
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Default does nothing. May \b not throw.
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*/
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virtual void onPostLeave(bool success);
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//! Create window
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/*!
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Called to create the window. This window is generally used to
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receive events, hide the cursor, and to capture keyboard and mouse
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input.
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*/
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virtual void createWindow() = 0;
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//! Destroy window
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/*!
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Called to destroy the window created by createWindow().
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*/
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virtual void destroyWindow() = 0;
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//! Show window
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/*!
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Called when the user navigates off the primary screen. Hide the
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cursor and grab exclusive access to the input devices. Every call
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to showWindow() has a matching call to hideWindow() which preceeds
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it. Return true iff successful (in particular, iff the input
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devices were grabbed).
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After a successful showWindow(), user input events and
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screensaver activation/deactivation should be reported to an
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IPrimaryScreenReceiver (set through another interface) until
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hideWindow() is called. Report mouse motion to its
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onMouseMoveSecondary(). User input should not be delivered to
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any application except this one.
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*/
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virtual bool showWindow() = 0;
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//! Hide window
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/*!
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Called when the user navigates back to the primary screen. Show
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the cursor and ungrab the input devices.
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After hideWindow(), user input events should be delivered normally
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to other applications. Mouse motion over (at least) the jump zones
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must be reported to an IPrimaryScreenReceiver's onMouseMovePrimary().
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*/
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virtual void hideWindow() = 0;
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//! Warp cursor for relative motion
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/*!
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Prepare the cursor to report relative motion. When the user has
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navigated to another screen, synergy requires the cursor motion
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deltas, not the absolute coordinates. Typically this is done by
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warping the cursor to the center of the primary screen and then
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every time it moves compute the motion and warp back to the
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center (but without reporting that warp as motion). This is
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only called after a successful showWindow().
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*/
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virtual void warpCursorToCenter() = 0;
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//! Synchronize key state
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/*!
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Check the current keyboard state. Normally a screen will save
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the keyboard state in this method and use this shadow state
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when handling user input and in methods like isLockedToScreen().
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*/
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virtual void updateKeys() = 0;
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private:
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void enterNoWarp();
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private:
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CMutex m_mutex;
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// object to notify of changes
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IScreenReceiver* m_receiver;
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// m_active is true if this screen has been left
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bool m_active;
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};
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#endif
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