#ifndef ICLIENT_H
#define ICLIENT_H

#include "IInterface.h"
#include "ClipboardTypes.h"
#include "KeyTypes.h"
#include "MouseTypes.h"
#include "CString.h"

//! Client interface
/*!
This interface defines the methods necessary for the server to
communicate with a client.
*/
class IClient : public IInterface {
public:
	//! @name manipulators
	//@{

	//! Open client
	/*!
	Open the client.  Throw if the client cannot be opened.  If the
	screen cannot be opened but retrying later may succeed then throw
	XScreenUnavailable.
	*/
	virtual void		open() = 0;

	//! Client main loop
	/*!
	Run client's event loop.  This method is typically called in a
	separate thread and is exited by cancelling the thread.  This
	must be called between a successful open() and close().

	(cancellation point)
	*/
	virtual void		mainLoop() = 0;

	//! Close client
	/*!
	Close the client.
	*/
	virtual void		close() = 0;

	//! Enter screen
	/*!
	Enter the screen.  The cursor should be warped to \c xAbs,yAbs.
	The client should record seqNum for future reporting of
	clipboard changes.  \c mask is the expected toggle button state
	and the client should update its state to match.  \c forScreensaver
	is true iff the screen is being entered because the screen saver is
	starting.
	*/
	virtual void		enter(SInt32 xAbs, SInt32 yAbs,
							UInt32 seqNum, KeyModifierMask mask,
							bool forScreensaver) = 0;

	//! Leave screen
	/*!
	Leave the screen.  Return false iff the user may not leave the
	client's screen (because, for example, a button is down).
	*/
	virtual bool		leave() = 0;

	//! Set clipboard
	/*!
	Update the client's clipboard.  This implies that the client's
	clipboard is now up to date.  If the client's clipboard was
	already known to be up to date then this may do nothing.  \c data
	has marshalled clipboard data.
	*/
	virtual void		setClipboard(ClipboardID, const CString& data) = 0;

	//! Grab clipboard
	/*!
	Grab (i.e. take ownership of) the client's clipboard.  Since this
	is called when another client takes ownership of the clipboard it
	implies that the client's clipboard is out of date.
	*/
	virtual void		grabClipboard(ClipboardID) = 0;

	//! Mark clipboard dirty
	/*!
	Mark the client's clipboard as dirty (out of date) or clean (up to
	date).
	*/
	virtual void		setClipboardDirty(ClipboardID, bool dirty) = 0;

	//! Notify of key press
	/*!
	Synthesize key events to generate a press of key \c id.  If possible
	match the given modifier mask.
	*/
	virtual void		keyDown(KeyID id, KeyModifierMask) = 0;

	//! Notify of key repeat
	/*!
	Synthesize key events to generate a press and release of key \c id
	\c count times.  If possible match the given modifier mask.
	*/
	virtual void		keyRepeat(KeyID id, KeyModifierMask, SInt32 count) = 0;

	//! Notify of key release
	/*!
	Synthesize key events to generate a release of key \c id.  If possible
	match the given modifier mask.
	*/
	virtual void		keyUp(KeyID id, KeyModifierMask) = 0;

	//! Notify of mouse press
	/*!
	Synthesize mouse events to generate a press of mouse button \c id.
	*/
	virtual void		mouseDown(ButtonID id) = 0;

	//! Notify of mouse release
	/*!
	Synthesize mouse events to generate a release of mouse button \c id.
	*/
	virtual void		mouseUp(ButtonID id) = 0;

	//! Notify of mouse motion
	/*!
	Synthesize mouse events to generate mouse motion to the absolute
	screen position \c xAbs,yAbs.
	*/
	virtual void		mouseMove(SInt32 xAbs, SInt32 yAbs) = 0;

	//! Notify of mouse wheel motion
	/*!
	Synthesize mouse events to generate mouse wheel motion of \c delta.
	\c delta is positive for motion away from the user and negative for
	motion towards the user.  Each wheel click should generate a delta
	of +/-120.
	*/
	virtual void		mouseWheel(SInt32 delta) = 0;

	//! Notify of screen saver change
	virtual void		screensaver(bool activate) = 0;

	//@}
	//! @name accessors
	//@{

	//! Get client name
	/*!
	Return the client's name.
	*/
	virtual CString		getName() const = 0;

	//! Get jump zone size
	/*!
	Called to get the jump zone size.
	*/
	virtual SInt32		getJumpZoneSize() const = 0;

	//! Get screen shape
	/*!
	Return the position of the upper-left corner of the screen in \c x and
	\c y and the size of the screen in \c width and \c height.
	*/
	virtual void		getShape(SInt32& x, SInt32& y,
							SInt32& width, SInt32& height) const = 0;

	//! Get cursor position
	/*!
	Return the current position of the cursor in \c x and \c y.
	*/
	virtual void		getCursorPos(SInt32& x, SInt32& y) const = 0;

	//! Get cursor center position
	/*!
	Return the cursor center position which is where we park the
	cursor to compute cursor motion deltas and should be far from
	the edges of the screen, typically the center.
	*/
	virtual void		getCursorCenter(SInt32& x, SInt32& y) const = 0;

	//@}
};

#endif