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#ifndef TOOLKIT_H      
#define TOOLKIT_H

#include "nsToolkitBase.h"

/**
 * The toolkit abstraction is necessary because the message pump must
 * execute within the same thread that created the widget under Win32.
 * We don't care about that on Mac: we have only one thread for the UI
 * and maybe even for the whole application.
 * 
 * So on the Mac, the nsToolkit used to be a unique object, created once
 * at startup along with nsAppShell and passed to all the top-level
 * windows and it became a convenient place to throw in everything we
 * didn't know where else to put, like the NSPR event queue and
 * the handling of global pointers on some special widgets (focused
 * widget, widget hit, widget pointed).
 *
 * All this has changed: the application now usually creates one copy of
 * the nsToolkit per window and the special widgets had to be moved
 * to the nsMacEventHandler.
 */

#include <MacTypes.h>
#include <MacWindows.h>

class nsIEventSink;
class nsIWidget;
class nsIView;
class nsIDocument;

#define MAC_OS_X_VERSION_10_0_HEX 0x00001000
#define MAC_OS_X_VERSION_10_1_HEX 0x00001010
#define MAC_OS_X_VERSION_10_2_HEX 0x00001020
#define MAC_OS_X_VERSION_10_3_HEX 0x00001030
#define MAC_OS_X_VERSION_10_4_HEX 0x00001040

class nsToolkit : public nsToolkitBase
{

public:
  nsToolkit();
  virtual				~nsToolkit();
  
protected:

  virtual nsresult  InitEventQueue(PRThread * aThread);

public:

  // utility routines for getting the toplevel widget and event sink
  // stashed in properties of the window.
  static void GetWindowEventSink ( WindowPtr aWindow, nsIEventSink** outSink ) ;
  static void GetTopWidget ( WindowPtr aWindow, nsIWidget** outWidget ) ;
  // Utility routines for wringing nsIDocument or nsIView info from an nsIWidget
  static nsIView *GetViewFor(nsIWidget *aWidget);
  static nsIDocument *GetDocumentFor(nsIWidget *aWidget);

  // Returns the OS X version as returned from
  // Gestalt(gestaltSystemVersion, ...)
  static long OSXVersion ( ) ;
};
#endif  // TOOLKIT_H