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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:06:44 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:06:44 +0000
commited5640d8b587fbcfed7dd7967f3de04b37a76f26 (patch)
tree7a5f7c6c9d02226d7471cb3cc8fbbf631b415303 /vcl/win/dtrans/WinClipboard.cxx
parentInitial commit. (diff)
downloadlibreoffice-ed5640d8b587fbcfed7dd7967f3de04b37a76f26.tar.xz
libreoffice-ed5640d8b587fbcfed7dd7967f3de04b37a76f26.zip
Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'vcl/win/dtrans/WinClipboard.cxx')
-rw-r--r--vcl/win/dtrans/WinClipboard.cxx386
1 files changed, 386 insertions, 0 deletions
diff --git a/vcl/win/dtrans/WinClipboard.cxx b/vcl/win/dtrans/WinClipboard.cxx
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+++ b/vcl/win/dtrans/WinClipboard.cxx
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+/* -*- 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: */