/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s):	Maarten Gribnau 05/2001
 *					Damien Plisson 09/2009
 *
 * ***** END GPL LICENSE BLOCK *****
 */

/** \file ghost/intern/GHOST_SystemCocoa.h
 *  \ingroup GHOST
 * Declaration of GHOST_SystemCocoa class.
 */

#ifndef __GHOST_SYSTEMCOCOA_H__
#define __GHOST_SYSTEMCOCOA_H__

#ifndef __APPLE__
#error Apple OSX only!
#endif // __APPLE__

//#define __CARBONSOUND__


#include "GHOST_System.h"

class GHOST_EventCursor;
class GHOST_EventKey;
class GHOST_EventWindow;
class GHOST_WindowCocoa;


class GHOST_SystemCocoa : public GHOST_System {
public:
	/**
	 * Constructor.
	 */
	GHOST_SystemCocoa();

	/**
	 * Destructor.
	 */
	~GHOST_SystemCocoa();

	/***************************************************************************************
	 * Time(r) functionality
	 ***************************************************************************************/

	/**
	 * Returns the system time.
	 * Returns the number of milliseconds since the start of the system process.
	 * Based on ANSI clock() routine.
	 * \return The number of milliseconds.
	 */
	virtual GHOST_TUns64 getMilliSeconds() const;

	/***************************************************************************************
	 * Display/window management functionality
	 ***************************************************************************************/

	/**
	 * Returns the number of displays on this system.
	 * \return The number of displays.
	 */
	virtual GHOST_TUns8 getNumDisplays() const;

	/**
	 * Returns the dimensions of the main display on this system.
	 * \return The dimension of the main display.
	 */
	virtual void getMainDisplayDimensions(GHOST_TUns32& width, GHOST_TUns32& height) const;
	
	/** Returns the combine dimensions of all monitors.
	 * \return The dimension of the workspace.
	 */
	virtual void getAllDisplayDimensions(GHOST_TUns32& width, GHOST_TUns32& height) const;

	/**
	 * Create a new window.
	 * The new window is added to the list of windows managed.
	 * Never explicitly delete the window, use disposeWindow() instead.
	 * \param	title			The name of the window (displayed in the title bar of the window if the OS supports it).
	 * \param	left			The coordinate of the left edge of the window.
	 * \param	top				The coordinate of the top edge of the window.
	 * \param	width			The width the window.
	 * \param	height			The height the window.
	 * \param	state			The state of the window when opened.
	 * \param	type			The type of drawing context installed in this window.
	 * \param	stereoVisual	Stereo visual for quad buffered stereo.
	 * \param	numOfAASamples	Number of samples used for AA (zero if no AA)
	 * \param	parentWindow    Parent (embedder) window
	 * \return	The new window (or 0 if creation failed).
	 */
	virtual GHOST_IWindow *createWindow(
	    const STR_String& title,
	    GHOST_TInt32 left,
	    GHOST_TInt32 top,
	    GHOST_TUns32 width,
	    GHOST_TUns32 height,
	    GHOST_TWindowState state,
	    GHOST_TDrawingContextType type,
	    const bool stereoVisual = false,
		const bool exclusive = false,
	    const GHOST_TUns16 numOfAASamples = 0,
	    const GHOST_TEmbedderWindowID parentWindow = 0
	    );
	
	/***************************************************************************************
	 * Event management functionality
	 ***************************************************************************************/

	/**
	 * Gets events from the system and stores them in the queue.
	 * \param waitForEvent Flag to wait for an event (or return immediately).
	 * \return Indication of the presence of events.
	 */
	virtual bool processEvents(bool waitForEvent);
	
	/**
	 * Handle User request to quit, from Menu bar Quit, and Cmd+Q
	 * Display alert panel if changes performed since last save
	 */
	GHOST_TUns8 handleQuitRequest();
	
	/**
	 * Handle Cocoa openFile event
	 * Display confirmation request panel if changes performed since last save
	 */
	bool handleOpenDocumentRequest(void *filepathStr);
	
	/**
	 * Handles a drag'n'drop destination event. Called by GHOST_WindowCocoa window subclass
	 * \param eventType The type of drag'n'drop event
	 * \param draggedObjectType The type object concerned (currently array of file names, string, TIFF image)
	 * \param mouseX x mouse coordinate (in cocoa base window coordinates)
	 * \param mouseY y mouse coordinate
	 * \param window The window on which the event occurred
	 * \return Indication whether the event was handled.
	 */
	GHOST_TSuccess handleDraggingEvent(GHOST_TEventType eventType, GHOST_TDragnDropTypes draggedObjectType,
	                                   GHOST_WindowCocoa *window, int mouseX, int mouseY, void *data);
	
	/***************************************************************************************
	 * Cursor management functionality
	 ***************************************************************************************/

	/**
	 * Returns the current location of the cursor (location in screen coordinates)
	 * \param x			The x-coordinate of the cursor.
	 * \param y			The y-coordinate of the cursor.
	 * \return			Indication of success.
	 */
	virtual GHOST_TSuccess getCursorPosition(GHOST_TInt32& x, GHOST_TInt32& y) const;

	/**
	 * Updates the location of the cursor (location in screen coordinates).
	 * \param x			The x-coordinate of the cursor.
	 * \param y			The y-coordinate of the cursor.
	 * \return			Indication of success.
	 */
	virtual GHOST_TSuccess setCursorPosition(GHOST_TInt32 x, GHOST_TInt32 y);
	
	/***************************************************************************************
	 * Access to mouse button and keyboard states.
	 ***************************************************************************************/

	/**
	 * Returns the state of all modifier keys.
	 * \param keys	The state of all modifier keys (true == pressed).
	 * \return		Indication of success.
	 */
	virtual GHOST_TSuccess getModifierKeys(GHOST_ModifierKeys& keys) const;

	/**
	 * Returns the state of the mouse buttons (ouside the message queue).
	 * \param buttons	The state of the buttons.
	 * \return			Indication of success.
	 */
	virtual GHOST_TSuccess getButtons(GHOST_Buttons& buttons) const;

	/**
	 * Returns Clipboard data
	 * \param selection		Indicate which buffer to return
	 * \return				Returns the selected buffer
	 */
	virtual GHOST_TUns8 *getClipboard(bool selection) const;
	
	/**
	 * Puts buffer to system clipboard
	 * \param buffer	The buffer to be copied
	 * \param selection	Indicates which buffer to copy too, only used on X11
	 */
	virtual void putClipboard(GHOST_TInt8 *buffer, bool selection) const;

	/**
	 * Handles a window event. Called by GHOST_WindowCocoa window delegate
	 * \param eventType The type of window event
	 * \param window The window on which the event occurred
	 * \return Indication whether the event was handled.
	 */
	GHOST_TSuccess handleWindowEvent(GHOST_TEventType eventType, GHOST_WindowCocoa *window);
	
	/**
	 * Handles the Cocoa event telling the application has become active (again)
	 * \return Indication whether the event was handled.
	 */
	GHOST_TSuccess handleApplicationBecomeActiveEvent();

	/**
	 * External objects should call this when they send an event outside processEvents.
	 */
	void notifyExternalEventProcessed();

	/**
	 * \see GHOST_ISystem
	 */
	int toggleConsole(int action) {
		return 0;
	}
	
	/**
	 * Handles a tablet event.
	 * \param eventPtr	An NSEvent pointer (casted to void* to enable compilation in standard C++)
	 * \param eventType The type of the event.
	 * It needs to be passed separately as it can be either directly in the event type,
	 * or as a subtype if combined with a mouse button event.
	 * \return Indication whether the event was handled.
	 */
	GHOST_TSuccess handleTabletEvent(void *eventPtr, short eventType);
	bool handleTabletEvent(void *eventPtr);

	/**
	 * Handles a mouse event.
	 * \param eventPtr	An NSEvent pointer (casted to void* to enable compilation in standard C++)
	 * \return Indication whether the event was handled.
	 */
	GHOST_TSuccess handleMouseEvent(void *eventPtr);

	/**
	 * Handles a key event.
	 * \param eventPtr	An NSEvent pointer (casted to void* to enable compilation in standard C++)
	 * \return Indication whether the event was handled.
	 */
	GHOST_TSuccess handleKeyEvent(void *eventPtr);
	
protected:
	/**
	 * Initializes the system.
	 * For now, it just registers the window class (WNDCLASS).
	 * \return A success value.
	 */
	virtual GHOST_TSuccess init();

	/**
	 * Performs the actual cursor position update (location in screen coordinates).
	 * \param x			The x-coordinate of the cursor.
	 * \param y			The y-coordinate of the cursor.
	 * \return			Indication of success.
	 */
	GHOST_TSuccess setMouseCursorPosition(GHOST_TInt32 x, GHOST_TInt32 y);

	/** Start time at initialization. */
	GHOST_TUns64 m_start_time;
	
	/** Event has been processed directly by Cocoa (or NDOF manager) and has sent a ghost event to be dispatched */
	bool m_outsideLoopEventProcessed;
	
	/** Raised window is not yet known by the window manager, so delay application become active event handling */
	bool m_needDelayedApplicationBecomeActiveEventProcessing;
	
	/** State of the modifiers. */
	GHOST_TUns32 m_modifierMask;

	/** Ignores window size messages (when window is dragged). */
	bool m_ignoreWindowSizedMessages;
	
	/** Stores the mouse cursor delta due to setting a new cursor position
	 * Needed because cocoa event delta cursor move takes setCursorPosition changes too.
	 */
	GHOST_TInt32 m_cursorDelta_x, m_cursorDelta_y;
	
	/** Multitouch trackpad availability */
	bool m_hasMultiTouchTrackpad;
	
};

#endif // __GHOST_SYSTEMCOCOA_H__