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Diffstat (limited to 'vcl/win/dtrans/WinClipboard.cxx')
| -rw-r--r-- | vcl/win/dtrans/WinClipboard.cxx | 386 |
1 files changed, 386 insertions, 0 deletions
diff --git a/vcl/win/dtrans/WinClipboard.cxx b/vcl/win/dtrans/WinClipboard.cxx new file mode 100644 index 000000000..2c33fe72e --- /dev/null +++ b/vcl/win/dtrans/WinClipboard.cxx @@ -0,0 +1,386 @@ +/* -*- 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 <sal/config.h> + +#include <osl/diagnose.h> +#include <tools/diagnose_ex.h> +#include <com/sun/star/datatransfer/clipboard/ClipboardEvent.hpp> +#include <com/sun/star/lang/DisposedException.hpp> +#include <com/sun/star/lang/IllegalArgumentException.hpp> +#include <com/sun/star/uno/XComponentContext.hpp> +#include <cppuhelper/supportsservice.hxx> +#include <cppuhelper/weak.hxx> +#include <vcl/svapp.hxx> +#include <svdata.hxx> +#include <salinst.hxx> + +#include <com/sun/star/datatransfer/clipboard/RenderingCapabilities.hpp> +#include "XNotifyingDataObject.hxx" + +#include <systools/win32/comtools.hxx> +#include "DtObjFactory.hxx" +#include "APNDataObject.hxx" +#include "DOTransferable.hxx" +#include "WinClipboard.hxx" + +#if !defined WIN32_LEAN_AND_MEAN +#define WIN32_LEAN_AND_MEAN +#endif +#include <windows.h> +#include <ole2.h> +#include <objidl.h> + +using namespace com::sun::star; + +namespace +{ +CWinClipboard* s_pCWinClipbImpl = nullptr; +osl::Mutex s_aClipboardSingletonMutex; +} + +/*XEventListener,*/ +CWinClipboard::CWinClipboard(const uno::Reference<uno::XComponentContext>& rxContext, + const OUString& aClipboardName) + : WeakComponentImplHelper<XSystemClipboard, XFlushableClipboard, XServiceInfo>(m_aMutex) + , m_xContext(rxContext) + , m_itsName(aClipboardName) + , m_pCurrentClipContent(nullptr) +{ + // necessary to reassociate from + // the static callback function + { + osl::MutexGuard aGuard(s_aClipboardSingletonMutex); + s_pCWinClipbImpl = this; + } + + registerClipboardViewer(); +} + +CWinClipboard::~CWinClipboard() +{ + { + osl::MutexGuard aGuard(s_aClipboardSingletonMutex); + s_pCWinClipbImpl = nullptr; + } + + unregisterClipboardViewer(); +} + +// XClipboard + +// to avoid unnecessary traffic we check first if there is a clipboard +// content which was set via setContent, in this case we don't need +// to query the content from the clipboard, create a new wrapper object +// and so on, we simply return the original XTransferable instead of our +// DOTransferable + +uno::Reference<datatransfer::XTransferable> SAL_CALL CWinClipboard::getContents() +{ + osl::MutexGuard aGuard(m_aContentMutex); + + if (rBHelper.bDisposed) + throw lang::DisposedException("object is already disposed", + static_cast<XClipboardEx*>(this)); + + // use the shortcut or create a transferable from + // system clipboard + { + osl::MutexGuard aGuard2(m_aContentCacheMutex); + + if (nullptr != m_pCurrentClipContent) + return m_pCurrentClipContent->m_XTransferable; + + // Content cached? + if (m_foreignContent.is()) + return m_foreignContent; + + // release the mutex, so that the variable may be + // changed by other threads + } + + uno::Reference<datatransfer::XTransferable> rClipContent; + + // get the current format list from clipboard + if (UINT nFormats; !GetUpdatedClipboardFormats(nullptr, 0, &nFormats) + && GetLastError() == ERROR_INSUFFICIENT_BUFFER) + { + std::vector<UINT> aUINTFormats(nFormats); + if (GetUpdatedClipboardFormats(aUINTFormats.data(), nFormats, &nFormats)) + { + std::vector<sal_uInt32> aFormats(aUINTFormats.begin(), aUINTFormats.end()); + rClipContent = new CDOTransferable(m_xContext, this, aFormats); + + osl::MutexGuard aGuard2(m_aContentCacheMutex); + m_foreignContent = rClipContent; + } + } + + return rClipContent; +} + +IDataObjectPtr CWinClipboard::getIDataObject() +{ + osl::MutexGuard aGuard(m_aContentMutex); + + if (rBHelper.bDisposed) + throw lang::DisposedException("object is already disposed", + static_cast<XClipboardEx*>(this)); + + // get the current dataobject from clipboard + IDataObjectPtr pIDataObject; + HRESULT hr = m_MtaOleClipboard.getClipboard(&pIDataObject); + + if (SUCCEEDED(hr)) + { + // create an apartment neutral dataobject and initialize it with a + // com smart pointer to the IDataObject from clipboard + pIDataObject = new CAPNDataObject(pIDataObject); + } + + return pIDataObject; +} + +void SAL_CALL CWinClipboard::setContents( + const uno::Reference<datatransfer::XTransferable>& xTransferable, + const uno::Reference<datatransfer::clipboard::XClipboardOwner>& xClipboardOwner) +{ + osl::MutexGuard aGuard(m_aContentMutex); + + if (rBHelper.bDisposed) + throw lang::DisposedException("object is already disposed", + static_cast<XClipboardEx*>(this)); + + IDataObjectPtr pIDataObj; + + if (xTransferable.is()) + { + { + osl::MutexGuard aGuard2(m_aContentCacheMutex); + + m_foreignContent.clear(); + + m_pCurrentClipContent = new CXNotifyingDataObject( + CDTransObjFactory::createDataObjFromTransferable(m_xContext, xTransferable), + xTransferable, xClipboardOwner, this); + } + + pIDataObj = IDataObjectPtr(m_pCurrentClipContent); + } + + m_MtaOleClipboard.setClipboard(pIDataObj.get()); +} + +OUString SAL_CALL CWinClipboard::getName() +{ + if (rBHelper.bDisposed) + throw lang::DisposedException("object is already disposed", + static_cast<XClipboardEx*>(this)); + + return m_itsName; +} + +// XFlushableClipboard + +void SAL_CALL CWinClipboard::flushClipboard() +{ + osl::MutexGuard aGuard(m_aContentMutex); + + if (rBHelper.bDisposed) + throw lang::DisposedException("object is already disposed", + static_cast<XClipboardEx*>(this)); + + // actually it should be ClearableMutexGuard aGuard( m_aContentCacheMutex ); + // but it does not work since FlushClipboard does a callback and frees DataObject + // which results in a deadlock in onReleaseDataObject. + // FlushClipboard had to be synchron in order to prevent shutdown until all + // clipboard-formats are rendered. + // The request is needed to prevent flushing if we are not clipboard owner (it is + // not known what happens if we flush but aren't clipboard owner). + // It may be possible to move the request to the clipboard STA thread by saving the + // DataObject and call OleIsCurrentClipboard before flushing. + + if (nullptr != m_pCurrentClipContent) + m_MtaOleClipboard.flushClipboard(); +} + +// XClipboardEx + +sal_Int8 SAL_CALL CWinClipboard::getRenderingCapabilities() +{ + if (rBHelper.bDisposed) + throw lang::DisposedException("object is already disposed", + static_cast<XClipboardEx*>(this)); + + using namespace datatransfer::clipboard::RenderingCapabilities; + return (Delayed | Persistent); +} + +// XClipboardNotifier + +void SAL_CALL CWinClipboard::addClipboardListener( + const uno::Reference<datatransfer::clipboard::XClipboardListener>& listener) +{ + if (rBHelper.bDisposed) + throw lang::DisposedException("object is already disposed", + static_cast<XClipboardEx*>(this)); + + // check input parameter + if (!listener.is()) + throw lang::IllegalArgumentException("empty reference", static_cast<XClipboardEx*>(this), + 1); + + rBHelper.aLC.addInterface(cppu::UnoType<decltype(listener)>::get(), listener); +} + +void SAL_CALL CWinClipboard::removeClipboardListener( + const uno::Reference<datatransfer::clipboard::XClipboardListener>& listener) +{ + if (rBHelper.bDisposed) + throw lang::DisposedException("object is already disposed", + static_cast<XClipboardEx*>(this)); + + // check input parameter + if (!listener.is()) + throw lang::IllegalArgumentException("empty reference", static_cast<XClipboardEx*>(this), + 1); + + rBHelper.aLC.removeInterface(cppu::UnoType<decltype(listener)>::get(), listener); +} + +void CWinClipboard::notifyAllClipboardListener() +{ + if (rBHelper.bDisposed) + return; + + osl::ClearableMutexGuard aGuard(rBHelper.rMutex); + if (rBHelper.bDisposed) + return; + aGuard.clear(); + + cppu::OInterfaceContainerHelper* pICHelper = rBHelper.aLC.getContainer( + cppu::UnoType<datatransfer::clipboard::XClipboardListener>::get()); + if (!pICHelper) + return; + + try + { + cppu::OInterfaceIteratorHelper iter(*pICHelper); + uno::Reference<datatransfer::XTransferable> rXTransf(getContents()); + datatransfer::clipboard::ClipboardEvent aClipbEvent(static_cast<XClipboard*>(this), + rXTransf); + + while (iter.hasMoreElements()) + { + try + { + uno::Reference<datatransfer::clipboard::XClipboardListener> xCBListener( + iter.next(), uno::UNO_QUERY); + if (xCBListener.is()) + xCBListener->changedContents(aClipbEvent); + } + catch (uno::RuntimeException&) + { + TOOLS_WARN_EXCEPTION("vcl", ""); + } + } + } + catch (const lang::DisposedException&) + { + OSL_FAIL("Service Manager disposed"); + + // no further clipboard changed notifications + unregisterClipboardViewer(); + } +} + +// XServiceInfo + +OUString SAL_CALL CWinClipboard::getImplementationName() +{ + return "com.sun.star.datatransfer.clipboard.ClipboardW32"; +} + +sal_Bool SAL_CALL CWinClipboard::supportsService(const OUString& ServiceName) +{ + return cppu::supportsService(this, ServiceName); +} + +uno::Sequence<OUString> SAL_CALL CWinClipboard::getSupportedServiceNames() +{ + return { "com.sun.star.datatransfer.clipboard.SystemClipboard" }; +} + +extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface* +dtrans_CWinClipboard_get_implementation(css::uno::XComponentContext* context, + css::uno::Sequence<css::uno::Any> const& args) +{ + // We run unit tests in parallel, which is a problem when touching a shared resource + // like the system clipboard, so rather use the dummy GenericClipboard. + static const bool bRunningUnitTest = getenv("LO_TESTNAME"); + + if (bRunningUnitTest) + { + SolarMutexGuard aGuard; + auto xClipboard = ImplGetSVData()->mpDefInst->CreateClipboard(args); + if (xClipboard.is()) + xClipboard->acquire(); + return xClipboard.get(); + } + else + { + return cppu::acquire(new CWinClipboard(context, "")); + } +} + +void CWinClipboard::onReleaseDataObject(CXNotifyingDataObject* theCaller) +{ + OSL_ASSERT(nullptr != theCaller); + + if (theCaller) + theCaller->lostOwnership(); + + // if the current caller is the one we currently hold, then set it to NULL + // because an external source must be the clipboardowner now + osl::MutexGuard aGuard(m_aContentCacheMutex); + + if (m_pCurrentClipContent == theCaller) + m_pCurrentClipContent = nullptr; +} + +void CWinClipboard::registerClipboardViewer() +{ + m_MtaOleClipboard.registerClipViewer(CWinClipboard::onClipboardContentChanged); +} + +void CWinClipboard::unregisterClipboardViewer() { m_MtaOleClipboard.registerClipViewer(nullptr); } + +void WINAPI CWinClipboard::onClipboardContentChanged() +{ + osl::MutexGuard aGuard(s_aClipboardSingletonMutex); + + // reassociation to instance through static member + if (nullptr != s_pCWinClipbImpl) + { + s_pCWinClipbImpl->m_foreignContent.clear(); + s_pCWinClipbImpl->notifyAllClipboardListener(); + } +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |