main/vcl/source/window/dndlcon.cxx

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 * 
 * 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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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_vcl.hxx"

#include <dndlcon.hxx>

using namespace ::cppu;
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::datatransfer;
using namespace ::com::sun::star::datatransfer::dnd;

//==================================================================================================
// 
//==================================================================================================

DNDListenerContainer::DNDListenerContainer( sal_Int8 nDefaultActions )
	: WeakComponentImplHelper4< XDragGestureRecognizer, XDropTargetDragContext, XDropTargetDropContext, XDropTarget >(GetMutex())
{
	m_bActive = sal_True;
	m_nDefaultActions = nDefaultActions;	
}

//==================================================================================================
// 
//==================================================================================================

DNDListenerContainer::~DNDListenerContainer()
{
}

//==================================================================================================
// DNDListenerContainer::addDragGestureListener
//==================================================================================================
	 
void SAL_CALL DNDListenerContainer::addDragGestureListener( const Reference< XDragGestureListener >& dgl ) 
	throw(RuntimeException)
{
	rBHelper.addListener( getCppuType( ( const Reference< XDragGestureListener > * ) 0 ), dgl );
}

//==================================================================================================
// DNDListenerContainer::removeDragGestureListener
//==================================================================================================

void SAL_CALL DNDListenerContainer::removeDragGestureListener( const Reference< XDragGestureListener >& dgl ) 
	throw(RuntimeException)
{
	rBHelper.removeListener( getCppuType( ( const Reference< XDragGestureListener > * ) 0 ), dgl );
}

//==================================================================================================
// DNDListenerContainer::resetRecognizer
//==================================================================================================

void SAL_CALL DNDListenerContainer::resetRecognizer(  ) 
	throw(RuntimeException)
{
}
	 
//==================================================================================================
// DNDListenerContainer::addDropTargetListener
//==================================================================================================

void SAL_CALL DNDListenerContainer::addDropTargetListener( const Reference< XDropTargetListener >& dtl ) 
	throw(RuntimeException)
{
	rBHelper.addListener( getCppuType( ( const Reference< XDropTargetListener > * ) 0 ), dtl );
}

//==================================================================================================
// DNDListenerContainer::removeDropTargetListener
//==================================================================================================

void SAL_CALL DNDListenerContainer::removeDropTargetListener( const Reference< XDropTargetListener >& dtl ) 
	throw(RuntimeException)
{
	rBHelper.removeListener( getCppuType( ( const Reference< XDropTargetListener > * ) 0 ), dtl );
}

//==================================================================================================
// DNDListenerContainer::isActive
//==================================================================================================

sal_Bool SAL_CALL DNDListenerContainer::isActive(  ) 
	throw(RuntimeException)
{
	return m_bActive;
}

//==================================================================================================
// DNDListenerContainer::setActive
//==================================================================================================

void SAL_CALL DNDListenerContainer::setActive( sal_Bool active ) 
	throw(RuntimeException)
{
	m_bActive = active;
}

//==================================================================================================
// DNDListenerContainer::getDefaultActions
//==================================================================================================

sal_Int8 SAL_CALL DNDListenerContainer::getDefaultActions(  ) 
	throw(RuntimeException)
{
	return m_nDefaultActions;
}

//==================================================================================================
// DNDListenerContainer::setDefaultActions
//==================================================================================================

void SAL_CALL DNDListenerContainer::setDefaultActions( sal_Int8 actions ) 
	throw(RuntimeException)
{
	m_nDefaultActions = actions;
}

//==================================================================================================
// DNDListenerContainer::fireDropEvent
//==================================================================================================

sal_uInt32 DNDListenerContainer::fireDropEvent( const Reference< XDropTargetDropContext >& context,	
	sal_Int8 dropAction, sal_Int32 locationX, sal_Int32 locationY, sal_Int8 sourceActions,
	const Reference< XTransferable >& transferable )
{
	sal_uInt32 nRet = 0;

	// fire DropTargetDropEvent on all XDropTargetListeners
	OInterfaceContainerHelper *pContainer = rBHelper.getContainer( getCppuType( ( Reference < XDropTargetListener > * ) 0) );
        
	if( pContainer && m_bActive )
	{
		OInterfaceIteratorHelper aIterator( *pContainer );
	
        // remember context to use in own context methods
        m_xDropTargetDropContext = context;

		// do not construct the event before you are sure at least one listener is registered
        DropTargetDropEvent aEvent( static_cast < XDropTarget * > (this), 0, 
            static_cast < XDropTargetDropContext * > (this), dropAction, 
            locationX, locationY, sourceActions, transferable );

		while (aIterator.hasMoreElements())
		{
			// FIXME: this can be simplified as soon as the Iterator has a remove method
			Reference< XInterface > xElement( aIterator.next() );

			try
			{
				// this may result in a runtime exception
				Reference < XDropTargetListener > xListener( xElement, UNO_QUERY );

				if( xListener.is() )
				{
                    // fire drop until the first one has accepted
                    if( m_xDropTargetDropContext.is() )
                        xListener->drop( aEvent );
                    else
                    {
                        DropTargetEvent aDTEvent( static_cast < XDropTarget * > (this), 0 );
                        xListener->dragExit( aDTEvent );
                    }

					nRet++;
                }
			}

			catch( RuntimeException&)
			{
				pContainer->removeInterface( xElement );
			}
		}

        // if context still valid, then reject drop
        if( m_xDropTargetDropContext.is() )
        {
            m_xDropTargetDropContext.clear();

            try
            {
                context->rejectDrop();
            }

            catch( RuntimeException&)
            {
            }
        }
    }

	return nRet;
}

//==================================================================================================
// DNDListenerContainer::fireDragExitEvent
//==================================================================================================

sal_uInt32 DNDListenerContainer::fireDragExitEvent()
{
	sal_uInt32 nRet = 0;
	
	// fire DropTargetDropEvent on all XDropTargetListeners
	OInterfaceContainerHelper *pContainer = rBHelper.getContainer( getCppuType( ( Reference < XDropTargetListener > * ) 0) );
        
	if( pContainer && m_bActive )
	{
		OInterfaceIteratorHelper aIterator( *pContainer );

		// do not construct the event before you are sure at least one listener is registered
		DropTargetEvent aEvent( static_cast < XDropTarget * > (this), 0 );

		while (aIterator.hasMoreElements())
		{
			// FIXME: this can be simplified as soon as the Iterator has a remove method
			Reference< XInterface > xElement( aIterator.next() );

			try
			{
				// this may result in a runtime exception
				Reference < XDropTargetListener > xListener( xElement, UNO_QUERY );

				if( xListener.is() )
				{
   					xListener->dragExit( aEvent );
					nRet++;
				}
			}

			catch( RuntimeException&)
			{
				pContainer->removeInterface( xElement );
			}
		}
	}

	return nRet;
}

//==================================================================================================
// DNDListenerContainer::fireDragOverEvent
//==================================================================================================

sal_uInt32 DNDListenerContainer::fireDragOverEvent( const Reference< XDropTargetDragContext >& context, 
	sal_Int8 dropAction, sal_Int32 locationX, sal_Int32 locationY, sal_Int8 sourceActions )
{
	sal_uInt32 nRet = 0;
	
	// fire DropTargetDropEvent on all XDropTargetListeners
	OInterfaceContainerHelper *pContainer = rBHelper.getContainer( getCppuType( ( Reference < XDropTargetListener > * ) 0) );
        
	if( pContainer && m_bActive )
	{
		OInterfaceIteratorHelper aIterator( *pContainer );

        // remember context to use in own context methods
        m_xDropTargetDragContext = context;

		// do not construct the event before you are sure at least one listener is registered
        DropTargetDragEvent aEvent( static_cast < XDropTarget * > (this), 0, 
            static_cast < XDropTargetDragContext * > (this), 
            dropAction, locationX, locationY, sourceActions );

		while (aIterator.hasMoreElements())
		{
			// FIXME: this can be simplified as soon as the Iterator has a remove method
			Reference< XInterface > xElement( aIterator.next() );

			try
			{
				// this may result in a runtime exception
				Reference < XDropTargetListener > xListener( xElement, UNO_QUERY );

				if( xListener.is() )
				{
                    if( m_xDropTargetDragContext.is() )
                        xListener->dragOver( aEvent );
  					nRet++;
				}
			}

			catch( RuntimeException&)
			{
				pContainer->removeInterface( xElement );
			}
		}

        // if context still valid, then reject drag
        if( m_xDropTargetDragContext.is() )
        {
            m_xDropTargetDragContext.clear();

            try
            {
                context->rejectDrag();
            }

    		catch( RuntimeException&)
            {
            }
        }
    }

	return nRet;
}

//==================================================================================================
// DNDListenerContainer::fireDragEnterEvent
//==================================================================================================

sal_uInt32 DNDListenerContainer::fireDragEnterEvent( const Reference< XDropTargetDragContext >& context,
	sal_Int8 dropAction, sal_Int32 locationX, sal_Int32 locationY, sal_Int8 sourceActions, 
	const Sequence< DataFlavor >& dataFlavors )
{
	sal_uInt32 nRet = 0;
	
	// fire DropTargetDropEvent on all XDropTargetListeners
	OInterfaceContainerHelper *pContainer = rBHelper.getContainer( getCppuType( ( Reference < XDropTargetListener > * ) 0) );
        
	if( pContainer && m_bActive )
	{
		OInterfaceIteratorHelper aIterator( *pContainer );

        // remember context to use in own context methods
        m_xDropTargetDragContext = context;

        // do not construct the event before you are sure at least one listener is registered
        DropTargetDragEnterEvent aEvent( static_cast < XDropTarget * > (this), 0, 
            static_cast < XDropTargetDragContext * > (this),
            dropAction, locationX, locationY, sourceActions, dataFlavors );

		while (aIterator.hasMoreElements())
		{
			// FIXME: this can be simplified as soon as the Iterator has a remove method
			Reference< XInterface > xElement( aIterator.next() );

			try
			{
				// this may result in a runtime exception
				Reference < XDropTargetListener > xListener( xElement, UNO_QUERY );

				if( xListener.is() )
				{
                    if( m_xDropTargetDragContext.is() )
                        xListener->dragEnter( aEvent );
					nRet++;
				}
			}

			catch( RuntimeException&)
			{
				pContainer->removeInterface( xElement );
			}
		}

        // if context still valid, then reject drag
        if( m_xDropTargetDragContext.is() )
        {
            m_xDropTargetDragContext.clear();

            try
            {
                context->rejectDrag();
            }

    		catch( RuntimeException&)
            {
            }
        }
    }

	return nRet;
}

//==================================================================================================
// DNDListenerContainer::fireDropActionChangedEvent
//==================================================================================================

sal_uInt32 DNDListenerContainer::fireDropActionChangedEvent( const Reference< XDropTargetDragContext >& context,
	sal_Int8 dropAction, sal_Int32 locationX, sal_Int32 locationY, sal_Int8 sourceActions )
{
	sal_uInt32 nRet = 0;
	
	// fire DropTargetDropEvent on all XDropTargetListeners
	OInterfaceContainerHelper *pContainer = rBHelper.getContainer( getCppuType( ( Reference < XDropTargetListener > * ) 0) );
        
	if( pContainer && m_bActive )
	{
		OInterfaceIteratorHelper aIterator( *pContainer );

        // remember context to use in own context methods
        m_xDropTargetDragContext = context;

		// do not construct the event before you are sure at least one listener is registered
        DropTargetDragEvent aEvent( static_cast < XDropTarget * > (this), 0, 
            static_cast < XDropTargetDragContext * > (this),
            dropAction, locationX, locationY, sourceActions );

		while (aIterator.hasMoreElements())
		{
			// FIXME: this can be simplified as soon as the Iterator has a remove method
			Reference< XInterface > xElement( aIterator.next() );

			try
			{
				// this may result in a runtime exception
				Reference < XDropTargetListener > xListener( xElement, UNO_QUERY );

				if( xListener.is() )
				{
                    if( m_xDropTargetDragContext.is() )
                        xListener->dropActionChanged( aEvent );
   					nRet++;
				}
			}

			catch( RuntimeException&)
			{
				pContainer->removeInterface( xElement );
			}
		}

        // if context still valid, then reject drag
        if( m_xDropTargetDragContext.is() )
        {
            m_xDropTargetDragContext.clear();

            try
            {
                context->rejectDrag();
            }

    		catch( RuntimeException&)
            {
            }
        }
    }

	return nRet;
}

//==================================================================================================
// DNDListenerContainer::fireDragGestureEvent
//==================================================================================================

sal_uInt32 DNDListenerContainer::fireDragGestureEvent( sal_Int8 dragAction, sal_Int32 dragOriginX,
	sal_Int32 dragOriginY, const Reference< XDragSource >& dragSource, const Any& triggerEvent )
{
	sal_uInt32 nRet = 0;
	
	// fire DropTargetDropEvent on all XDropTargetListeners
	OInterfaceContainerHelper *pContainer = rBHelper.getContainer( getCppuType( ( Reference < XDragGestureListener > * ) 0) );
        
	if( pContainer )
	{
		OInterfaceIteratorHelper aIterator( *pContainer );

		// do not construct the event before you are sure at least one listener is registered
		DragGestureEvent aEvent( static_cast < XDragGestureRecognizer * > (this), dragAction, 
			dragOriginX, dragOriginY, dragSource, triggerEvent );

		while( aIterator.hasMoreElements() )
		{
			// FIXME: this can be simplified as soon as the Iterator has a remove method
			Reference< XInterface > xElement( aIterator.next() );

			try
			{
				// this may result in a runtime exception
				Reference < XDragGestureListener > xListener( xElement, UNO_QUERY );

				if( xListener.is() )
				{
					xListener->dragGestureRecognized( aEvent );
					nRet++;
				}
			}

			catch( RuntimeException&)
			{
				pContainer->removeInterface( xElement );
			}
		}
	}

	return nRet;
}

//==================================================================================================
// DNDListenerContainer::acceptDrag
//==================================================================================================

void SAL_CALL DNDListenerContainer::acceptDrag( sal_Int8 dragOperation ) throw (RuntimeException)
{
    if( m_xDropTargetDragContext.is() )
    {
        m_xDropTargetDragContext->acceptDrag( dragOperation );
        m_xDropTargetDragContext.clear();
    }
}

//==================================================================================================
// DNDListenerContainer::rejectDrag
//==================================================================================================

void SAL_CALL DNDListenerContainer::rejectDrag(  ) throw (RuntimeException)
{
    // nothing to do here
}

//==================================================================================================
// DNDListenerContainer::acceptDrop
//==================================================================================================

void SAL_CALL DNDListenerContainer::acceptDrop( sal_Int8 dropOperation ) throw (RuntimeException)
{
    if( m_xDropTargetDropContext.is() )
        m_xDropTargetDropContext->acceptDrop( dropOperation );
}

//==================================================================================================
// DNDListenerContainer::rejectDrop
//==================================================================================================

void SAL_CALL DNDListenerContainer::rejectDrop(  ) throw (RuntimeException)
{
    // nothing to do here
}

//==================================================================================================
// DNDListenerContainer::dropComplete
//==================================================================================================

void SAL_CALL DNDListenerContainer::dropComplete( sal_Bool success ) throw (RuntimeException)
{
    if( m_xDropTargetDropContext.is() )
    {
        m_xDropTargetDropContext->dropComplete( success );
        m_xDropTargetDropContext.clear();
    }
}