libreoffice/vcl/source/window/dndlcon.cxx

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   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 .
 */

#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 = true;
    m_nDefaultActions = nDefaultActions;
}

DNDListenerContainer::~DNDListenerContainer()
{
}

// DNDListenerContainer::addDragGestureListener

void SAL_CALL DNDListenerContainer::addDragGestureListener( const Reference< XDragGestureListener >& dgl )
    throw(RuntimeException, std::exception)
{
    rBHelper.addListener( cppu::UnoType<XDragGestureListener>::get(), dgl );
}

// DNDListenerContainer::removeDragGestureListener

void SAL_CALL DNDListenerContainer::removeDragGestureListener( const Reference< XDragGestureListener >& dgl )
    throw(RuntimeException, std::exception)
{
    rBHelper.removeListener( cppu::UnoType<XDragGestureListener>::get(), dgl );
}

// DNDListenerContainer::resetRecognizer

void SAL_CALL DNDListenerContainer::resetRecognizer(  )
    throw(RuntimeException, std::exception)
{
}

// DNDListenerContainer::addDropTargetListener

void SAL_CALL DNDListenerContainer::addDropTargetListener( const Reference< XDropTargetListener >& dtl )
    throw(RuntimeException, std::exception)
{
    rBHelper.addListener( cppu::UnoType<XDropTargetListener>::get(), dtl );
}

// DNDListenerContainer::removeDropTargetListener

void SAL_CALL DNDListenerContainer::removeDropTargetListener( const Reference< XDropTargetListener >& dtl )
    throw(RuntimeException, std::exception)
{
    rBHelper.removeListener( cppu::UnoType<XDropTargetListener>::get(), dtl );
}

// DNDListenerContainer::isActive

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

// DNDListenerContainer::setActive

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

// DNDListenerContainer::getDefaultActions

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

// DNDListenerContainer::setDefaultActions

void SAL_CALL DNDListenerContainer::setDefaultActions( sal_Int8 actions )
    throw(RuntimeException, std::exception)
{
    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( cppu::UnoType<XDropTargetListener>::get());

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

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

            try
            {
                context->rejectDrop();
            }
            catch (const RuntimeException&)
            {
            }
        }
    }

    return nRet;
}

// DNDListenerContainer::fireDragExitEvent

sal_uInt32 DNDListenerContainer::fireDragExitEvent()
{
    sal_uInt32 nRet = 0;

    // fire DropTargetDropEvent on all XDropTargetListeners
    OInterfaceContainerHelper *pContainer = rBHelper.getContainer( cppu::UnoType<XDropTargetListener>::get());

    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 (const 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( cppu::UnoType<XDropTargetListener>::get());

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

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

            try
            {
                context->rejectDrag();
            }
            catch (const 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( cppu::UnoType<XDropTargetListener>::get());

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

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

            try
            {
                context->rejectDrag();
            }
            catch (const 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( cppu::UnoType<XDropTargetListener>::get());

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

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

            try
            {
                context->rejectDrag();
            }
            catch (const 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( cppu::UnoType<XDragGestureListener>::get());

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

    return nRet;
}

// DNDListenerContainer::acceptDrag

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

// DNDListenerContainer::rejectDrag

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

// DNDListenerContainer::acceptDrop

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

// DNDListenerContainer::rejectDrop

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

// DNDListenerContainer::dropComplete

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

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