/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * 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
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
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 *************************************************************/



#ifndef _DROPTARGET_HXX_
#define _DROPTARGET_HXX_

#include "DataFlavorMapping.hxx"
#include <cppuhelper/compbase5.hxx>
#include <com/sun/star/lang/XInitialization.hpp>
#include <com/sun/star/datatransfer/dnd/XDropTarget.hpp>

#ifndef _COM_SUN_STAR_DATATRANSFER_DND_XDROPTARGETLISTENR_HPP_
#include <com/sun/star/datatransfer/dnd/XDropTargetListener.hpp>
#endif
#include <com/sun/star/datatransfer/dnd/DropTargetDragEnterEvent.hpp>
#include <com/sun/star/datatransfer/dnd/XDropTargetDragContext.hpp>
#include <com/sun/star/datatransfer/dnd/XDropTargetDropContext.hpp>
#include <com/sun/star/datatransfer/clipboard/XClipboard.hpp>
#include <com/sun/star/lang/XServiceInfo.hpp>
#include <cppuhelper/basemutex.hxx>
#include <com/sun/star/lang/XMultiComponentFactory.hpp>

#include <boost/utility.hpp>

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

class DropTarget;
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 DraggingDestinationHandler
-(void)registerDraggingDestinationHandler:(id)theHandler;
-(void)unregisterDraggingDestinationHandler:(id)theHandler;
@end


@interface DropTargetHelper : NSObject
{
  DropTarget* mDropTarget;
}

-(DropTargetHelper*)initWithDropTarget:(DropTarget*)pdt;

-(NSDragOperation)draggingEntered:(id <NSDraggingInfo>)sender;
-(NSDragOperation)draggingUpdated:(id <NSDraggingInfo>)sender;
-(void)draggingExited:(id <NSDraggingInfo>)sender;
-(BOOL)prepareForDragOperation:(id <NSDraggingInfo>)sender;
-(BOOL)performDragOperation:(id <NSDraggingInfo>)sender;
-(void)concludeDragOperation:(id <NSDraggingInfo>)sender;

@end


class DropTarget: public cppu::BaseMutex,
				  public cppu::WeakComponentImplHelper5< com::sun::star::lang::XInitialization, 
														 com::sun::star::datatransfer::dnd::XDropTarget, 
														 com::sun::star::datatransfer::dnd::XDropTargetDragContext,
														 com::sun::star::datatransfer::dnd::XDropTargetDropContext,
														 com::sun::star::lang::XServiceInfo >,
				  private boost::noncopyable
{
public:
  DropTarget();
  virtual ~DropTarget();

  // Overrides WeakComponentImplHelper::disposing which is called by
  // WeakComponentImplHelper::dispose
  // Must be called.
  virtual void SAL_CALL disposing();

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

  // XDropTarget
  virtual void SAL_CALL addDropTargetListener( const com::sun::star::uno::Reference< com::sun::star::datatransfer::dnd::XDropTargetListener >& dtl )
	throw(com::sun::star::uno::RuntimeException);

  virtual void SAL_CALL removeDropTargetListener( const com::sun::star::uno::Reference<  com::sun::star::datatransfer::dnd::XDropTargetListener >& dtl )
	throw(com::sun::star::uno::RuntimeException);

  // Default is not active
  virtual sal_Bool SAL_CALL isActive() throw(com::sun::star::uno::RuntimeException);
  virtual void SAL_CALL setActive(sal_Bool isActive) throw(com::sun::star::uno::RuntimeException);
  virtual sal_Int8 SAL_CALL getDefaultActions() throw(com::sun::star::uno::RuntimeException);
  virtual void SAL_CALL setDefaultActions(sal_Int8 actions) throw(com::sun::star::uno::RuntimeException);

  // XDropTargetDragContext
  virtual void SAL_CALL acceptDrag(sal_Int8 dragOperation) throw(com::sun::star::uno::RuntimeException);
  virtual void SAL_CALL rejectDrag() throw(com::sun::star::uno::RuntimeException);

  // XDropTargetDragContext 
  virtual void SAL_CALL acceptDrop(sal_Int8 dropOperation) throw (com::sun::star::uno::RuntimeException);
  virtual void SAL_CALL rejectDrop() throw (com::sun::star::uno::RuntimeException);
  virtual void SAL_CALL dropComplete(sal_Bool success) 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);

  // NSDraggingDestination protocol functions
  virtual NSDragOperation draggingEntered(id sender);
  virtual NSDragOperation draggingUpdated(id sender);
  virtual void draggingExited(id sender);
  virtual BOOL prepareForDragOperation(id sender);
  virtual BOOL performDragOperation(id sender);
  virtual void concludeDragOperation(id sender);

  /* If multiple actions are supported by the drag source and
	 the user did not choose a specific action by pressing a
	 modifier key choose a default action to be proposed to
	 the application.
  */
  sal_Int8 determineDropAction(sal_Int8 dropActions, id sender) const;

private:
  void fire_drop(const com::sun::star::datatransfer::dnd::DropTargetDropEvent& dte);
  void fire_dragEnter(const com::sun::star::datatransfer::dnd::DropTargetDragEnterEvent& dtdee);
  void fire_dragExit(const com::sun::star::datatransfer::dnd::DropTargetEvent& dte);
  void fire_dragOver(const com::sun::star::datatransfer::dnd::DropTargetDragEvent& dtde);
  void fire_dropActionChanged(const com::sun::star::datatransfer::dnd::DropTargetDragEvent& dtde);

private:
  com::sun::star::uno::Reference< com::sun::star::datatransfer::dnd::XDropTargetDragContext > mXCurrentDragContext;
  com::sun::star::uno::Reference< com::sun::star::datatransfer::dnd::XDropTargetDropContext > mXCurrentDropContext;
  com::sun::star::uno::Reference< com::sun::star::datatransfer::clipboard::XClipboard > mXCurrentDragClipboard;
  DataFlavorMapperPtr_t mDataFlavorMapper;
  id  mView;
  AquaSalFrame* mpFrame;
  DropTargetHelper* mDropTargetHelper;
  bool mbActive;
  sal_Int8 mDragSourceSupportedActions;
  sal_Int8 mSelectedDropAction;
  sal_Int8 mDefaultActions;
};

#endif