177 lines
7.5 KiB
C++
177 lines
7.5 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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#pragma once
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#include <com/sun/star/lang/XInitialization.hpp>
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#include <com/sun/star/datatransfer/dnd/XDropTarget.hpp>
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#include <com/sun/star/datatransfer/dnd/DropTargetDragEnterEvent.hpp>
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#include <com/sun/star/lang/XServiceInfo.hpp>
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#include <cppuhelper/basemutex.hxx>
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#include <cppuhelper/compbase.hxx>
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#include <cppuhelper/interfacecontainer.hxx>
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#include <osl/mutex.hxx>
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#include <oleidl.h>
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namespace com::sun::star::uno
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{
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class XComponentContext;
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}
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using namespace ::com::sun::star::lang;
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using namespace ::com::sun::star::uno;
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using namespace cppu;
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using namespace osl;
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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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// The client
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// has to call XComponent::dispose. The thread that calls initialize
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// must also execute the destruction of the instance. This is because
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// initialize calls OleInitialize and the destructor calls OleUninitialize.
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// If the service calls OleInitialize then it also calls OleUnitialize when
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// it is destroyed. Therefore no second instance may exist which was
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// created in the same thread and still needs OLE.
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class DropTarget : public cppu::BaseMutex,
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public WeakComponentImplHelper<XInitialization, XDropTarget, XServiceInfo>
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{
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private:
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friend unsigned __stdcall DndTargetOleSTAFunc(void* pParams);
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// The native window which acts as drop target.
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// It is set in initialize. In case RegisterDragDrop fails it is set
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// to NULL
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HWND m_hWnd; // set by initialize
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// Holds the thread id of the thread which created the window that is the
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// drop target. Only used when DropTarget::initialize is called from an MTA
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// thread
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DWORD m_threadIdWindow;
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// This is the thread id of the OLE thread that is created in DropTarget::initialize
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// when the calling thread is an MTA
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unsigned m_threadIdTarget;
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// The handle of the thread that is created in DropTarget::initialize
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// when the calling thread is an MTA
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HANDLE m_hOleThread;
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// The thread id of the thread which called initialize. When the service dies
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// than m_oleThreadId is used to determine if the service successfully called
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// OleInitialize. If so then OleUninitialize has to be called.
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DWORD m_oleThreadId;
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// An Instance of IDropTargetImpl which receives calls from the system's drag
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// and drop implementation. It delegate the calls to name alike functions in
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// this class.
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IDropTarget* m_pDropTarget;
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Reference<XComponentContext> m_xContext;
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// If m_bActive == sal_True then events are fired to XDropTargetListener s,
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// none otherwise. The default value is sal_True.
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bool m_bActive;
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sal_Int8 m_nDefaultActions;
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// This value is set when a XDropTargetListener calls accept or reject on
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// the XDropTargetDropContext or XDropTargetDragContext.
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// The values are from the DNDConstants group.
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sal_Int8 m_nCurrentDropAction;
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// This value is manipulated by the XDropTargetListener
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sal_Int8 m_nLastDropAction;
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Reference<XTransferable> m_currentData;
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// The current action is used to determine if the USER
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// action has changed (dropActionChanged)
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// sal_Int8 m_userAction;
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// Set by listeners when they call XDropTargetDropContext::dropComplete
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bool m_bDropComplete;
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Reference<XDropTargetDragContext> m_currentDragContext;
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Reference<XDropTargetDropContext> m_currentDropContext;
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public:
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explicit DropTarget(const Reference<XComponentContext>& rxContext);
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virtual ~DropTarget() override;
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DropTarget(DropTarget const&) = delete;
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DropTarget& operator=(DropTarget const&) = delete;
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// Overrides WeakComponentImplHelper::disposing which is called by
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// WeakComponentImplHelper::dispose
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// Must be called.
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virtual void SAL_CALL disposing() override;
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// XInitialization
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virtual void SAL_CALL initialize(const Sequence<Any>& aArguments) override;
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// XDropTarget
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virtual void SAL_CALL addDropTargetListener(const Reference<XDropTargetListener>& dtl) override;
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virtual void SAL_CALL
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removeDropTargetListener(const Reference<XDropTargetListener>& dtl) override;
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// Default is not active
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virtual sal_Bool SAL_CALL isActive() override;
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virtual void SAL_CALL setActive(sal_Bool isActive) override;
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virtual sal_Int8 SAL_CALL getDefaultActions() override;
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virtual void SAL_CALL setDefaultActions(sal_Int8 actions) override;
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// XServiceInfo
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virtual OUString SAL_CALL getImplementationName() override;
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virtual sal_Bool SAL_CALL supportsService(const OUString& ServiceName) override;
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virtual Sequence<OUString> SAL_CALL getSupportedServiceNames() override;
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// Functions called from the IDropTarget implementation ( m_pDropTarget)
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virtual HRESULT DragEnter(
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/* [unique][in] */ IDataObject* pDataObj,
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/* [in] */ DWORD grfKeyState,
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/* [in] */ POINTL pt,
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/* [out][in] */ DWORD* pdwEffect);
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virtual HRESULT STDMETHODCALLTYPE DragOver(
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/* [in] */ DWORD grfKeyState,
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/* [in] */ POINTL pt,
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/* [out][in] */ DWORD* pdwEffect);
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virtual HRESULT STDMETHODCALLTYPE DragLeave();
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virtual HRESULT STDMETHODCALLTYPE Drop(
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/* [unique][in] */ IDataObject* pDataObj,
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/* [in] */ DWORD grfKeyState,
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/* [in] */ POINTL pt,
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/* [out][in] */ DWORD* pdwEffect);
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// Non - interface functions --------------------------------------------------
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// XDropTargetDropContext delegated from DropContext
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void _acceptDrop(sal_Int8 dropOperation, const Reference<XDropTargetDropContext>& context);
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void _rejectDrop(const Reference<XDropTargetDropContext>& context);
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void _dropComplete(bool success, const Reference<XDropTargetDropContext>& context);
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// XDropTargetDragContext delegated from DragContext
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void _acceptDrag(sal_Int8 dragOperation, const Reference<XDropTargetDragContext>& context);
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void _rejectDrag(const Reference<XDropTargetDragContext>& context);
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protected:
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// Gets the current action dependent on the pressed modifiers, the effects
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// supported by the drop source (IDropSource) and the default actions of the
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// drop target (XDropTarget, this class))
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inline sal_Int8 getFilteredActions(DWORD grfKeyState, DWORD sourceActions);
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// Only filters with the default actions
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inline sal_Int8 getFilteredActions(DWORD grfKeyState);
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void fire_drop(const DropTargetDropEvent& dte);
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void fire_dragEnter(const DropTargetDragEnterEvent& dtde);
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void fire_dragExit(const DropTargetEvent& dte);
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void fire_dragOver(const DropTargetDragEvent& dtde);
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void fire_dropActionChanged(const DropTargetDragEvent& dtde);
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};
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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