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diff --git a/sc/source/core/tool/ddelink.cxx b/sc/source/core/tool/ddelink.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 <comphelper/fileformat.h>
+#include <comphelper/string.hxx>
+#include <osl/thread.h>
+#include <sot/exchange.hxx>
+#include <sfx2/linkmgr.hxx>
+#include <sfx2/bindings.hxx>
+#include <svl/numformat.hxx>
+#include <svl/sharedstringpool.hxx>
+#include <o3tl/string_view.hxx>
+
+#include <ddelink.hxx>
+#include <brdcst.hxx>
+#include <document.hxx>
+#include <scmatrix.hxx>
+#include <patattr.hxx>
+#include <rechead.hxx>
+#include <rangeseq.hxx>
+#include <sc.hrc>
+#include <hints.hxx>
+
+
+bool ScDdeLink::bIsInUpdate = false;
+
+ScDdeLink::ScDdeLink( ScDocument& rD, const OUString& rA, const OUString& rT, const OUString& rI,
+ sal_uInt8 nM ) :
+ ::sfx2::SvBaseLink(SfxLinkUpdateMode::ALWAYS,SotClipboardFormatId::STRING),
+ rDoc( rD ),
+ aAppl( rA ),
+ aTopic( rT ),
+ aItem( rI ),
+ nMode( nM ),
+ bNeedUpdate( false ),
+ pResult( nullptr )
+{
+}
+
+ScDdeLink::~ScDdeLink()
+{
+ // cancel connection
+
+ // pResult is refcounted
+}
+
+ScDdeLink::ScDdeLink( ScDocument& rD, const ScDdeLink& rOther ) :
+ ::sfx2::SvBaseLink(SfxLinkUpdateMode::ALWAYS,SotClipboardFormatId::STRING),
+ rDoc ( rD ),
+ aAppl ( rOther.aAppl ),
+ aTopic ( rOther.aTopic ),
+ aItem ( rOther.aItem ),
+ nMode ( rOther.nMode ),
+ bNeedUpdate( false ),
+ pResult ( nullptr )
+{
+ if (rOther.pResult)
+ pResult = rOther.pResult->Clone();
+}
+
+ScDdeLink::ScDdeLink( ScDocument& rD, SvStream& rStream, ScMultipleReadHeader& rHdr ) :
+ ::sfx2::SvBaseLink(SfxLinkUpdateMode::ALWAYS,SotClipboardFormatId::STRING),
+ rDoc( rD ),
+ bNeedUpdate( false ),
+ pResult( nullptr )
+{
+ rHdr.StartEntry();
+
+ rtl_TextEncoding eCharSet = rStream.GetStreamCharSet();
+ aAppl = rStream.ReadUniOrByteString( eCharSet );
+ aTopic = rStream.ReadUniOrByteString( eCharSet );
+ aItem = rStream.ReadUniOrByteString( eCharSet );
+
+ bool bHasValue;
+ rStream.ReadCharAsBool( bHasValue );
+ if ( bHasValue )
+ pResult = new ScMatrix(0, 0);
+
+ if (rHdr.BytesLeft()) // new in 388b and the 364w (RealTime Client) version
+ rStream.ReadUChar( nMode );
+ else
+ nMode = SC_DDE_DEFAULT;
+
+ rHdr.EndEntry();
+}
+
+void ScDdeLink::Store( SvStream& rStream, ScMultipleWriteHeader& rHdr ) const
+{
+ rHdr.StartEntry();
+
+ rtl_TextEncoding eCharSet = rStream.GetStreamCharSet();
+ rStream.WriteUniOrByteString( aAppl, eCharSet );
+ rStream.WriteUniOrByteString( aTopic, eCharSet );
+ rStream.WriteUniOrByteString( aItem, eCharSet );
+
+ bool bHasValue = ( pResult != nullptr );
+ rStream.WriteBool( bHasValue );
+
+ if( rStream.GetVersion() > SOFFICE_FILEFORMAT_40 ) // not with 4.0 Export
+ rStream.WriteUChar( nMode ); // since 388b
+
+ // links with Mode != SC_DDE_DEFAULT are completely omitted in 4.0 Export
+ // (from ScDocument::SaveDdeLinks)
+
+ rHdr.EndEntry();
+}
+
+sfx2::SvBaseLink::UpdateResult ScDdeLink::DataChanged(
+ const OUString& rMimeType, const css::uno::Any & rValue )
+{
+ // we only master strings...
+ if ( SotClipboardFormatId::STRING != SotExchange::GetFormatIdFromMimeType( rMimeType ))
+ return SUCCESS;
+
+ OUString aLinkStr;
+ if (!(rValue >>= aLinkStr))
+ ScByteSequenceToString::GetString( aLinkStr, rValue, osl_getThreadTextEncoding() );
+ aLinkStr = convertLineEnd(aLinkStr, LINEEND_LF);
+
+ // if string ends with line end, discard:
+
+ sal_Int32 nLen = aLinkStr.getLength();
+ if (nLen && aLinkStr[nLen-1] == '\n')
+ aLinkStr = aLinkStr.copy(0, nLen-1);
+
+ SCSIZE nCols = 1; // empty string -> an empty line
+ SCSIZE nRows = 1;
+ if (!aLinkStr.isEmpty())
+ {
+ nRows = static_cast<SCSIZE>(comphelper::string::getTokenCount(aLinkStr, '\n'));
+ std::u16string_view aLine = o3tl::getToken(aLinkStr, 0, '\n' );
+ if (!aLine.empty())
+ nCols = static_cast<SCSIZE>(comphelper::string::getTokenCount(aLine, '\t'));
+ }
+
+ if (!nRows || !nCols) // no data
+ {
+ pResult.reset();
+ }
+ else // split data
+ {
+ // always newly re-create matrix, so that bIsString doesn't get mixed up
+ pResult = new ScMatrix(nCols, nRows, 0.0);
+
+ SvNumberFormatter* pFormatter = rDoc.GetFormatTable();
+ svl::SharedStringPool& rPool = rDoc.GetSharedStringPool();
+
+ // nMode determines how the text is interpreted (#44455#/#49783#):
+ // SC_DDE_DEFAULT - number format from cell template "Standard"
+ // SC_DDE_ENGLISH - standard number format for English/US
+ // SC_DDE_TEXT - without NumberFormatter directly as string
+ sal_uLong nStdFormat = 0;
+ if ( nMode == SC_DDE_DEFAULT )
+ {
+ ScPatternAttr* pDefPattern = rDoc.GetDefPattern(); // contains standard template
+ if ( pDefPattern )
+ nStdFormat = pDefPattern->GetNumberFormat( pFormatter );
+ }
+ else if ( nMode == SC_DDE_ENGLISH )
+ nStdFormat = pFormatter->GetStandardIndex(LANGUAGE_ENGLISH_US);
+
+ for (SCSIZE nR=0; nR<nRows; nR++)
+ {
+ std::u16string_view aLine = o3tl::getToken(aLinkStr, static_cast<sal_Int32>(nR), '\n' );
+ for (SCSIZE nC=0; nC<nCols; nC++)
+ {
+ OUString aEntry( o3tl::getToken(aLine, static_cast<sal_Int32>(nC), '\t' ) );
+ sal_uInt32 nIndex = nStdFormat;
+ double fVal = double();
+ if ( nMode != SC_DDE_TEXT && pFormatter->IsNumberFormat( aEntry, nIndex, fVal ) )
+ pResult->PutDouble( fVal, nC, nR );
+ else if (aEntry.isEmpty())
+ // empty cell
+ pResult->PutEmpty(nC, nR);
+ else
+ pResult->PutString(rPool.intern(aEntry), nC, nR);
+ }
+ }
+ }
+
+ // Something happened...
+
+ if (HasListeners())
+ {
+ Broadcast(ScHint(SfxHintId::ScDataChanged, ScAddress()));
+ rDoc.TrackFormulas(); // must happen immediately
+ rDoc.StartTrackTimer();
+
+ // StartTrackTimer asynchronously calls TrackFormulas, Broadcast(FID_DATACHANGED),
+ // ResetChanged, SetModified and Invalidate(SID_SAVEDOC/SID_DOC_MODIFIED)
+ // TrackFormulas additionally once again immediately, so that, e.g., a formula still
+ // located in the FormulaTrack doesn't get calculated by IdleCalc (#61676#)
+
+ // notify Uno objects (for XRefreshListener)
+ // must be after TrackFormulas
+ //TODO: do this asynchronously?
+ ScLinkRefreshedHint aHint;
+ aHint.SetDdeLink( aAppl, aTopic, aItem );
+ rDoc.BroadcastUno( aHint );
+ }
+
+ return SUCCESS;
+}
+
+void ScDdeLink::ListenersGone()
+{
+ bool bWas = bIsInUpdate;
+ bIsInUpdate = true; // Remove() can trigger reschedule??!?
+
+ ScDocument& rStackDoc = rDoc; // member rDoc can't be used after removing the link
+
+ sfx2::LinkManager* pLinkMgr = rDoc.GetLinkManager();
+ pLinkMgr->Remove( this); // deletes this
+
+ if ( pLinkMgr->GetLinks().empty() ) // deleted the last one ?
+ {
+ SfxBindings* pBindings = rStackDoc.GetViewBindings(); // don't use member rDoc!
+ if (pBindings)
+ pBindings->Invalidate( SID_LINKS );
+ }
+
+ bIsInUpdate = bWas;
+}
+
+const ScMatrix* ScDdeLink::GetResult() const
+{
+ return pResult.get();
+}
+
+void ScDdeLink::SetResult( const ScMatrixRef& pRes )
+{
+ pResult = pRes;
+}
+
+void ScDdeLink::TryUpdate()
+{
+ if (bIsInUpdate)
+ bNeedUpdate = true; // cannot be executed now
+ else
+ {
+ bIsInUpdate = true;
+ rDoc.IncInDdeLinkUpdate();
+ Update();
+ rDoc.DecInDdeLinkUpdate();
+ bIsInUpdate = false;
+ bNeedUpdate = false;
+ }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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