412 lines
13 KiB
C++
412 lines
13 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <dndeventdispatcher.hxx>
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#include <dndlistenercontainer.hxx>
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#include <sal/log.hxx>
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#include <osl/mutex.hxx>
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#include <vcl/svapp.hxx>
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#include <vcl/settings.hxx>
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using namespace ::cppu;
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using namespace ::com::sun::star::uno;
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using namespace ::com::sun::star::lang;
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using namespace ::com::sun::star::datatransfer;
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using namespace ::com::sun::star::datatransfer::dnd;
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DNDEventDispatcher::DNDEventDispatcher( vcl::Window * pTopWindow ):
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m_pTopWindow( pTopWindow ),
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m_pCurrentWindow( nullptr )
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{
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}
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DNDEventDispatcher::~DNDEventDispatcher()
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{
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designate_currentwindow(nullptr);
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}
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vcl::Window* DNDEventDispatcher::findTopLevelWindow(Point& location)
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{
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SolarMutexGuard aSolarGuard;
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// find the window that is toplevel for this coordinates
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// because those coordinates come from outside, they must be mirrored if RTL layout is active
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if( AllSettings::GetLayoutRTL() )
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m_pTopWindow->ImplMirrorFramePos( location );
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vcl::Window * pChildWindow = m_pTopWindow->ImplFindWindow( location );
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if( nullptr == pChildWindow )
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pChildWindow = m_pTopWindow;
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while( pChildWindow->ImplGetClientWindow() )
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pChildWindow = pChildWindow->ImplGetClientWindow();
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if( pChildWindow->GetOutDev()->ImplIsAntiparallel() )
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{
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const OutputDevice *pChildWinOutDev = pChildWindow->GetOutDev();
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pChildWinOutDev->ReMirror( location );
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}
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return pChildWindow;
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}
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IMPL_LINK(DNDEventDispatcher, WindowEventListener, VclWindowEvent&, rEvent, void)
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{
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if (rEvent.GetId() == VclEventId::ObjectDying)
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{
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designate_currentwindow(nullptr);
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}
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}
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void DNDEventDispatcher::designate_currentwindow(vcl::Window *pWindow)
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{
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if (m_pCurrentWindow)
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m_pCurrentWindow->RemoveEventListener(LINK(this, DNDEventDispatcher, WindowEventListener));
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m_pCurrentWindow = pWindow;
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if (m_pCurrentWindow)
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m_pCurrentWindow->AddEventListener(LINK(this, DNDEventDispatcher, WindowEventListener));
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}
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void SAL_CALL DNDEventDispatcher::drop( const DropTargetDropEvent& dtde )
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{
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std::scoped_lock aImplGuard( m_aMutex );
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Point location( dtde.LocationX, dtde.LocationY );
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vcl::Window* pChildWindow = findTopLevelWindow(location);
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// handle the case that drop is in another vcl window than the last dragOver
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if( pChildWindow != m_pCurrentWindow.get() )
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{
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// fire dragExit on listeners of previous window
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fireDragExitEvent( m_pCurrentWindow );
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fireDragEnterEvent( pChildWindow, static_cast < XDropTargetDragContext * > (this),
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dtde.DropAction, location, dtde.SourceActions, m_aDataFlavorList );
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}
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// send drop event to the child window
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sal_Int32 nListeners = fireDropEvent( pChildWindow, dtde.Context, dtde.DropAction,
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location, dtde.SourceActions, dtde.Transferable );
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// reject drop if no listeners found
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if( nListeners == 0 ) {
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SAL_WARN( "vcl", "rejecting drop due to missing listeners." );
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dtde.Context->rejectDrop();
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}
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// this is a drop -> no further drag overs
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designate_currentwindow(nullptr);
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m_aDataFlavorList.realloc( 0 );
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}
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void SAL_CALL DNDEventDispatcher::dragEnter( const DropTargetDragEnterEvent& dtdee )
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{
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std::scoped_lock aImplGuard( m_aMutex );
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Point location( dtdee.LocationX, dtdee.LocationY );
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vcl::Window * pChildWindow = findTopLevelWindow(location);
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// assume pointer write operation to be atomic
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designate_currentwindow(pChildWindow);
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m_aDataFlavorList = dtdee.SupportedDataFlavors;
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// fire dragEnter on listeners of current window
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sal_Int32 nListeners = fireDragEnterEvent( pChildWindow, dtdee.Context, dtdee.DropAction, location,
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dtdee.SourceActions, dtdee.SupportedDataFlavors );
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// reject drag if no listener found
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if( nListeners == 0 ) {
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SAL_WARN( "vcl", "rejecting drag enter due to missing listeners." );
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dtdee.Context->rejectDrag();
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}
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}
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void SAL_CALL DNDEventDispatcher::dragExit( const DropTargetEvent& /*dte*/ )
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{
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std::scoped_lock aImplGuard( m_aMutex );
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fireDragExitEvent( m_pCurrentWindow );
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// reset member values
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designate_currentwindow(nullptr);
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m_aDataFlavorList.realloc( 0 );
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}
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void SAL_CALL DNDEventDispatcher::dragOver( const DropTargetDragEvent& dtde )
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{
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std::scoped_lock aImplGuard( m_aMutex );
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Point location( dtde.LocationX, dtde.LocationY );
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sal_Int32 nListeners;
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vcl::Window * pChildWindow = findTopLevelWindow(location);
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if( pChildWindow != m_pCurrentWindow.get() )
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{
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// fire dragExit on listeners of previous window
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fireDragExitEvent( m_pCurrentWindow );
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// remember new window
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designate_currentwindow(pChildWindow);
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// fire dragEnter on listeners of current window
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nListeners = fireDragEnterEvent( pChildWindow, dtde.Context, dtde.DropAction, location,
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dtde.SourceActions, m_aDataFlavorList );
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}
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else
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{
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// fire dragOver on listeners of current window
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nListeners = fireDragOverEvent( pChildWindow, dtde.Context, dtde.DropAction, location,
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dtde.SourceActions );
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}
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// reject drag if no listener found
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if( nListeners == 0 )
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{
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SAL_WARN( "vcl", "rejecting drag over due to missing listeners." );
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dtde.Context->rejectDrag();
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}
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}
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void SAL_CALL DNDEventDispatcher::dropActionChanged( const DropTargetDragEvent& dtde )
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{
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std::scoped_lock aImplGuard( m_aMutex );
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Point location( dtde.LocationX, dtde.LocationY );
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sal_Int32 nListeners;
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vcl::Window* pChildWindow = findTopLevelWindow(location);
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if( pChildWindow != m_pCurrentWindow.get() )
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{
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// fire dragExit on listeners of previous window
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fireDragExitEvent( m_pCurrentWindow );
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// remember new window
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designate_currentwindow(pChildWindow);
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// fire dragEnter on listeners of current window
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nListeners = fireDragEnterEvent( pChildWindow, dtde.Context, dtde.DropAction, location,
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dtde.SourceActions, m_aDataFlavorList );
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}
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else
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{
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// fire dropActionChanged on listeners of current window
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nListeners = fireDropActionChangedEvent( pChildWindow, dtde.Context, dtde.DropAction, location,
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dtde.SourceActions );
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}
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// reject drag if no listener found
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if( nListeners == 0 )
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{
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SAL_WARN( "vcl", "rejecting dropActionChanged due to missing listeners." );
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dtde.Context->rejectDrag();
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}
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}
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void SAL_CALL DNDEventDispatcher::dragGestureRecognized( const DragGestureEvent& dge )
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{
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std::scoped_lock aImplGuard( m_aMutex );
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Point origin( dge.DragOriginX, dge.DragOriginY );
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vcl::Window* pChildWindow = findTopLevelWindow(origin);
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fireDragGestureEvent( pChildWindow, dge.DragSource, dge.Event, origin, dge.DragAction );
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}
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void SAL_CALL DNDEventDispatcher::disposing( const EventObject& )
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{
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}
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void SAL_CALL DNDEventDispatcher::acceptDrag( sal_Int8 /*dropAction*/ )
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{
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}
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void SAL_CALL DNDEventDispatcher::rejectDrag()
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{
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}
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sal_Int32 DNDEventDispatcher::fireDragEnterEvent( vcl::Window *pWindow,
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const Reference< XDropTargetDragContext >& xContext, const sal_Int8 nDropAction,
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const Point& rLocation, const sal_Int8 nSourceActions, const Sequence< DataFlavor >& aFlavorList
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)
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{
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sal_Int32 n = 0;
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if( pWindow && pWindow->IsInputEnabled() && ! pWindow->IsInModalMode() )
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{
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SolarMutexClearableGuard aSolarGuard;
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// query DropTarget from window
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Reference< XDropTarget > xDropTarget = pWindow->GetDropTarget();
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if( xDropTarget.is() )
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{
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// retrieve relative mouse position
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Point relLoc = pWindow->ScreenToOutputPixel( rLocation );
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aSolarGuard.clear();
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n = static_cast < DNDListenerContainer * > ( xDropTarget.get() )->fireDragEnterEvent(
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xContext, nDropAction, relLoc.X(), relLoc.Y(), nSourceActions, aFlavorList );
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}
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}
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return n;
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}
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sal_Int32 DNDEventDispatcher::fireDragOverEvent( vcl::Window *pWindow,
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const Reference< XDropTargetDragContext >& xContext, const sal_Int8 nDropAction,
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const Point& rLocation, const sal_Int8 nSourceActions
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)
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{
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sal_Int32 n = 0;
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if( pWindow && pWindow->IsInputEnabled() && ! pWindow->IsInModalMode() )
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{
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SolarMutexClearableGuard aSolarGuard;
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// query DropTarget from window
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Reference< XDropTarget > xDropTarget = pWindow->GetDropTarget();
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if( xDropTarget.is() )
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{
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// retrieve relative mouse position
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Point relLoc = pWindow->ScreenToOutputPixel( rLocation );
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aSolarGuard.clear();
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n = static_cast < DNDListenerContainer * > ( xDropTarget.get() )->fireDragOverEvent(
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xContext, nDropAction, relLoc.X(), relLoc.Y(), nSourceActions );
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}
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}
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return n;
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}
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sal_Int32 DNDEventDispatcher::fireDragExitEvent( vcl::Window *pWindow )
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{
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sal_Int32 n = 0;
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if( pWindow && pWindow->IsInputEnabled() && ! pWindow->IsInModalMode() )
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{
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SolarMutexClearableGuard aGuard;
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// query DropTarget from window
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Reference< XDropTarget > xDropTarget = pWindow->GetDropTarget();
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aGuard.clear();
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if( xDropTarget.is() )
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n = static_cast < DNDListenerContainer * > ( xDropTarget.get() )->fireDragExitEvent();
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}
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return n;
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}
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sal_Int32 DNDEventDispatcher::fireDropActionChangedEvent( vcl::Window *pWindow,
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const Reference< XDropTargetDragContext >& xContext, const sal_Int8 nDropAction,
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const Point& rLocation, const sal_Int8 nSourceActions
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)
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{
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sal_Int32 n = 0;
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if( pWindow && pWindow->IsInputEnabled() && ! pWindow->IsInModalMode() )
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{
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SolarMutexClearableGuard aGuard;
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// query DropTarget from window
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Reference< XDropTarget > xDropTarget = pWindow->GetDropTarget();
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if( xDropTarget.is() )
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{
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// retrieve relative mouse position
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Point relLoc = pWindow->ScreenToOutputPixel( rLocation );
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aGuard.clear();
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n = static_cast < DNDListenerContainer * > ( xDropTarget.get() )->fireDropActionChangedEvent(
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xContext, nDropAction, relLoc.X(), relLoc.Y(), nSourceActions );
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}
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}
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return n;
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}
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sal_Int32 DNDEventDispatcher::fireDropEvent( vcl::Window *pWindow,
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const Reference< XDropTargetDropContext >& xContext, const sal_Int8 nDropAction, const Point& rLocation,
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const sal_Int8 nSourceActions, const Reference< XTransferable >& xTransferable
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)
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{
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sal_Int32 n = 0;
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if( pWindow && pWindow->IsInputEnabled() && ! pWindow->IsInModalMode() )
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{
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SolarMutexClearableGuard aGuard;
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// query DropTarget from window
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Reference< XDropTarget > xDropTarget = pWindow->GetDropTarget();
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// window may be destroyed in drop event handler
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VclPtr<vcl::Window> xPreventDelete = pWindow;
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if( xDropTarget.is() )
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{
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// retrieve relative mouse position
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Point relLoc = pWindow->ScreenToOutputPixel( rLocation );
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aGuard.clear();
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n = static_cast < DNDListenerContainer * > ( xDropTarget.get() )->fireDropEvent(
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xContext, nDropAction, relLoc.X(), relLoc.Y(), nSourceActions, xTransferable );
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}
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}
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return n;
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}
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sal_Int32 DNDEventDispatcher::fireDragGestureEvent( vcl::Window *pWindow,
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const Reference< XDragSource >& xSource, const Any& event,
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const Point& rOrigin, const sal_Int8 nDragAction
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)
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{
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sal_Int32 n = 0;
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if( pWindow && pWindow->IsInputEnabled() && ! pWindow->IsInModalMode() )
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{
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SolarMutexClearableGuard aGuard;
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// query DropTarget from window
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Reference< XDragGestureRecognizer > xDragGestureRecognizer = pWindow->GetDragGestureRecognizer();
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if( xDragGestureRecognizer.is() )
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{
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// retrieve relative mouse position
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Point relLoc = pWindow->ScreenToOutputPixel( rOrigin );
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aGuard.clear();
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n = static_cast < DNDListenerContainer * > ( xDragGestureRecognizer.get() )->fireDragGestureEvent(
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nDragAction, relLoc.X(), relLoc.Y(), xSource, event );
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}
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}
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return n;
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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