/**************************************************************
 * 
 * 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
 * under the License.
 * 
 *************************************************************/



// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_dtrans.hxx"
#include <com/sun/star/datatransfer/dnd/DNDConstants.hpp>

#include "globals.hxx"

//--> TRA
#include <com/sun/star/datatransfer/XTransferable.hpp>

// used as shortcut when drag-source and drop-target are the same
::com::sun::star::uno::Reference< ::com::sun::star::datatransfer::XTransferable > g_XTransferable;

//<-- TRA

using namespace com::sun::star::datatransfer::dnd::DNDConstants;

sal_Int8 dndOleKeysToAction( DWORD grfKeyState, sal_Int8 nSourceActions)
{
	sal_Int8 ret= 0;

	// no MK_ALT, MK_CONTROL, MK_SHIFT
	if( !(grfKeyState & MK_CONTROL) &&
		!(grfKeyState & MK_ALT)	   &&
		!(grfKeyState & MK_RBUTTON) &&
		!(grfKeyState & MK_SHIFT))
	{
        if( nSourceActions & ACTION_MOVE )
        {
		    ret= ACTION_DEFAULT | ACTION_MOVE;
        }
        
        else if( nSourceActions & ACTION_COPY )
        {
    		ret= ACTION_COPY;
        }

        else if( nSourceActions & ACTION_LINK )
        {
    		ret= ACTION_LINK;
        }

        else
            ret = 0;
	}
	else if( grfKeyState & MK_SHIFT &&
			!(grfKeyState & MK_CONTROL))
	{
		ret= ACTION_MOVE;
	}
	else if ( grfKeyState & MK_CONTROL && 
			  !(grfKeyState & MK_SHIFT)	)
	{
		ret= ACTION_COPY;
	}
	else if ( grfKeyState & MK_CONTROL &&
			  grfKeyState & MK_SHIFT)
	{
		ret= ACTION_LINK;
	}
	else if ( grfKeyState & MK_RBUTTON | 
			  grfKeyState & MK_ALT)
	{
		ret= ACTION_COPY_OR_MOVE | ACTION_LINK;
	}
	return ret;
}


sal_Int8 dndOleDropEffectsToActions( DWORD dwEffect)
{
	sal_Int8 ret= ACTION_NONE;
	if( dwEffect & DROPEFFECT_COPY)
		ret |= ACTION_COPY;
	if( dwEffect & DROPEFFECT_MOVE)
		ret |= ACTION_MOVE;
	if( dwEffect & DROPEFFECT_LINK)
		ret |= ACTION_LINK;

	return ret;
}

DWORD dndActionsToDropEffects( sal_Int8 actions)
{
	DWORD ret= DROPEFFECT_NONE;
	if( actions & ACTION_MOVE)
		ret |= DROPEFFECT_MOVE;
	if( actions & ACTION_COPY)
		ret |= DROPEFFECT_COPY;
	if( actions & ACTION_LINK)
		ret |= DROPEFFECT_LINK;
	if( actions & ACTION_DEFAULT)
		ret |= DROPEFFECT_COPY;
	return ret;
}

DWORD dndActionsToSingleDropEffect( sal_Int8 actions)
{
	DWORD effects= dndActionsToDropEffects( actions);

	sal_Int8 countEffect= 0;

	if( effects & DROPEFFECT_MOVE)
		countEffect++;
	if( effects & DROPEFFECT_COPY)
		countEffect++;
	if( effects & DROPEFFECT_LINK)
		countEffect++;

	// DROPEFFECT_MOVE is the default effect
	DWORD retVal= countEffect > 1 ? DROPEFFECT_MOVE : effects;
	return retVal;
}