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 * Licensed to the Apache Software Foundation (ASF) under one
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 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
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 * KIND, either express or implied.  See the License for the
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#ifndef _DRAGSOURCE_HXX_
#define _DRAGSOURCE_HXX_

#include <com/sun/star/datatransfer/dnd/XDragSource.hpp>
#include <com/sun/star/datatransfer/dnd/XDragSourceContext.hpp>
#include <com/sun/star/lang/XInitialization.hpp>
#include <cppuhelper/compbase3.hxx>
#include <com/sun/star/lang/XServiceInfo.hpp>
#include <cppuhelper/basemutex.hxx>
#include <com/sun/star/uno/XComponentContext.hpp>
#include <osl/thread.h>
#include <com/sun/star/awt/MouseEvent.hpp>

#include <boost/utility.hpp>

#include <premac.h>
#import <Cocoa/Cocoa.h>
#include <postmac.h>


class DragSource;
class AquaSalFrame;

/* The functions declared in this protocol are actually 
   declared in vcl/aqua/inc/salframe.h. Because we want
   to avoid importing VCL headers in UNO services and
   on the other hand want to avoid warnings caused by
   gcc complaining about unknowness of these functions
   we declare them in a protocol here and cast at the
   appropriate places.
*/
@protocol MouseEventListener
-(void)registerMouseEventListener:(id)theHandler;
-(void)unregisterMouseEventListener:(id)theHandler;
@end


@interface DragSourceHelper : NSObject
{
  DragSource* mDragSource;
}

-(DragSourceHelper*)initWithDragSource: (DragSource*) pds;

-(void)mouseDown: (NSEvent*)theEvent;
-(void)mouseDragged: (NSEvent*)theEvent;

-(unsigned int)draggingSourceOperationMaskForLocal:(BOOL)isLocal;
-(void)draggedImage:(NSImage*)anImage beganAt:(NSPoint)aPoint;
-(void)draggedImage:(NSImage *)anImage endedAt:(NSPoint)aPoint operation:(NSDragOperation)operation;
-(void)draggedImage:(NSImage *)draggedImage movedTo:(NSPoint)screenPoint;

@end


class DragSource : public ::cppu::BaseMutex,
				   public ::cppu::WeakComponentImplHelper3< com::sun::star::datatransfer::dnd::XDragSource, 
															com::sun::star::lang::XInitialization, 
															com::sun::star::lang::XServiceInfo >,
				   private ::boost::noncopyable
{
public:
  DragSource();
  virtual ~DragSource();

  // XInitialization
  virtual void SAL_CALL initialize( const com::sun::star::uno::Sequence< com::sun::star::uno::Any >& aArguments )
	throw(com::sun::star::uno::Exception/*, com::sun::star::uno::RuntimeException*/);

  // XDragSource
  virtual sal_Bool SAL_CALL isDragImageSupported(  ) throw(com::sun::star::uno::RuntimeException);

  virtual sal_Int32 SAL_CALL getDefaultCursor(sal_Int8 dragAction)
	throw(com::sun::star::lang::IllegalArgumentException, com::sun::star::uno::RuntimeException);
  
  virtual void SAL_CALL startDrag( const com::sun::star::datatransfer::dnd::DragGestureEvent& trigger,
								   sal_Int8 sourceActions,
								   sal_Int32 cursor,
								   sal_Int32 image,
								   const com::sun::star::uno::Reference< com::sun::star::datatransfer::XTransferable >& transferable,
								   const com::sun::star::uno::Reference< com::sun::star::datatransfer::dnd::XDragSourceListener >& listener )
	throw(com::sun::star::uno::RuntimeException);

  // XServiceInfo
  virtual rtl::OUString SAL_CALL getImplementationName() throw (com::sun::star::uno::RuntimeException);
  virtual sal_Bool SAL_CALL supportsService(const rtl::OUString& ServiceName) throw (com::sun::star::uno::RuntimeException);
  virtual com::sun::star::uno::Sequence< rtl::OUString > SAL_CALL getSupportedServiceNames() throw (com::sun::star::uno::RuntimeException);

  virtual void saveMouseEvent(NSEvent* theEvent);
  virtual unsigned int getSupportedDragOperations(bool isLocal) const;

public:
  // The context notifies the XDragSourceListeners
  com::sun::star::uno::Reference< com::sun::star::datatransfer::dnd::XDragSourceContext > mXCurrentContext;

  id mView;
  AquaSalFrame* mpFrame;
  NSEvent* mLastMouseEventBeforeStartDrag;
  DragSourceHelper* mDragSourceHelper;
  com::sun::star::awt::MouseEvent mMouseEvent;
  com::sun::star::uno::Reference< com::sun::star::datatransfer::XTransferable > mXTransferable;
  com::sun::star::uno::Reference< com::sun::star::datatransfer::dnd::XDragSourceListener > mXDragSrcListener;
  // The mouse button that set off the drag and drop operation
  short m_MouseButton;
  sal_Int8 mDragSourceActions;
  
  static com::sun::star::uno::Reference< com::sun::star::datatransfer::XTransferable > g_XTransferable;
  static NSView* g_DragSourceView;
  static bool    g_DropSuccessSet;
  static bool    g_DropSuccess;

};


#endif