1 files changed, 383 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 <comphelper/diagnose_ex.hxx>
+#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)
+    : 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();
+}
+
+void CWinClipboard::disposing(std::unique_lock<std::mutex>& mutex)
+{
+    {
+        osl::MutexGuard aGuard(s_aClipboardSingletonMutex);
+        s_pCWinClipbImpl = nullptr;
+    }
+
+    unregisterClipboardViewer();
+
+    WeakComponentImplHelper::disposing(mutex);
+}
+
+// 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 (m_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 (m_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 (m_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 (m_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 (m_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 (m_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 (m_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);
+
+    std::unique_lock aGuard(m_aMutex);
+    maClipboardListeners.addInterface(aGuard, listener);
+}
+
+void SAL_CALL CWinClipboard::removeClipboardListener(
+    const uno::Reference<datatransfer::clipboard::XClipboardListener>& listener)
+{
+    if (m_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);
+
+    std::unique_lock aGuard(m_aMutex);
+    maClipboardListeners.removeInterface(aGuard, listener);
+}
+
+void CWinClipboard::notifyAllClipboardListener()
+{
+    if (m_bDisposed)
+        return;
+
+    std::unique_lock aGuard(m_aMutex);
+    if (m_bDisposed)
+        return;
+
+    if (!maClipboardListeners.getLength(aGuard))
+        return;
+
+    try
+    {
+        uno::Reference<datatransfer::XTransferable> rXTransf(getContents());
+        datatransfer::clipboard::ClipboardEvent aClipbEvent(static_cast<XClipboard*>(this),
+                                                            rXTransf);
+        maClipboardListeners.notifyEach(
+            aGuard, &datatransfer::clipboard::XClipboardListener::changedContents, aClipbEvent);
+    }
+    catch (const lang::DisposedException&)
+    {
+        OSL_FAIL("Service Manager disposed");
+
+        aGuard.unlock();
+        // 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: */