1 files changed, 158 insertions, 0 deletions
diff --git a/oox/source/core/relations.cxx b/oox/source/core/relations.cxx
new file mode 100644
index 000000000..f927c542c
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+++ b/oox/source/core/relations.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 <algorithm>
+#include <string_view>
+
+#include <oox/core/relations.hxx>
+
+namespace oox::core {
+
+namespace {
+
+std::u16string_view lclRemoveFileName( std::u16string_view rPath )
+{
+    size_t idx = rPath.rfind( '/' );
+    if (idx == std::u16string_view::npos)
+        return std::u16string_view();
+    return rPath.substr( 0, idx );
+}
+
+OUString lclAppendFileName( std::u16string_view rPath, const OUString& rFileName )
+{
+    return rPath.empty() ? rFileName :
+        rPath + OUStringChar('/') + rFileName;
+}
+
+OUString createOfficeDocRelationTypeTransitional(std::u16string_view rType)
+{
+    return OUString::Concat("http://schemas.openxmlformats.org/officeDocument/2006/relationships/")
+        + rType;
+}
+
+OUString createOfficeDocRelationTypeStrict(std::u16string_view rType)
+{
+    return OUString::Concat("http://purl.oclc.org/ooxml/officeDocument/relationships/") + rType;
+}
+
+}
+
+Relations::Relations( const OUString& rFragmentPath )
+    : maFragmentPath( rFragmentPath )
+{
+}
+
+const Relation* Relations::getRelationFromRelId( const OUString& rId ) const
+{
+    ::std::map< OUString, Relation >::const_iterator aIt = maMap.find( rId );
+    return (aIt == maMap.end()) ? nullptr : &aIt->second;
+}
+
+const Relation* Relations::getRelationFromFirstType( std::u16string_view rType ) const
+{
+    for (auto const& elem : maMap)
+        if( elem.second.maType.equalsIgnoreAsciiCase( rType ) )
+            return &elem.second;
+    return nullptr;
+}
+
+RelationsRef Relations::getRelationsFromTypeFromOfficeDoc( std::u16string_view rType ) const
+{
+    RelationsRef xRelations = std::make_shared<Relations>( maFragmentPath );
+    for (auto const& elem : maMap)
+        if( elem.second.maType.equalsIgnoreAsciiCase( createOfficeDocRelationTypeTransitional(rType) ) ||
+                elem.second.maType.equalsIgnoreAsciiCase( createOfficeDocRelationTypeStrict(rType) ))
+            xRelations->maMap[ elem.first ] = elem.second;
+    return xRelations;
+}
+
+OUString Relations::getExternalTargetFromRelId( const OUString& rRelId ) const
+{
+    const Relation* pRelation = getRelationFromRelId( rRelId );
+    return (pRelation && pRelation->mbExternal) ? pRelation->maTarget : OUString();
+}
+
+OUString Relations::getInternalTargetFromRelId( const OUString& rRelId ) const
+{
+    const Relation* pRelation = getRelationFromRelId( rRelId );
+    return (pRelation && !pRelation->mbExternal) ? pRelation->maTarget : OUString();
+}
+
+OUString Relations::getFragmentPathFromRelation( const Relation& rRelation ) const
+{
+    // no target, no fragment path
+    if( rRelation.mbExternal || rRelation.maTarget.isEmpty() )
+        return OUString();
+
+    // absolute target: return it without leading slash (#i100978)
+    if( rRelation.maTarget[ 0 ] == '/' )
+        return rRelation.maTarget.copy( 1 );
+
+    // empty fragment path: return target
+    if( maFragmentPath.isEmpty() )
+        return rRelation.maTarget;
+
+    // resolve relative target path according to base path
+    OUString aPath( lclRemoveFileName( maFragmentPath ) );
+    sal_Int32 nStartPos = 0;
+    while( nStartPos < rRelation.maTarget.getLength() )
+    {
+        sal_Int32 nSepPos = rRelation.maTarget.indexOf( '/', nStartPos );
+        if( nSepPos < 0 ) nSepPos = rRelation.maTarget.getLength();
+        // append next directory name from aTarget to aPath, or remove last directory on '../'
+        if( (nStartPos + 2 == nSepPos) && (rRelation.maTarget[ nStartPos ] == '.') && (rRelation.maTarget[ nStartPos + 1 ] == '.') )
+            aPath = lclRemoveFileName( aPath );
+        else
+            aPath = lclAppendFileName( aPath, rRelation.maTarget.copy( nStartPos, nSepPos - nStartPos ) );
+        // move nStartPos to next directory name
+        nStartPos = nSepPos + 1;
+    }
+
+    return aPath;
+}
+
+OUString Relations::getFragmentPathFromRelId( const OUString& rRelId ) const
+{
+    const Relation* pRelation = getRelationFromRelId( rRelId );
+    return pRelation ? getFragmentPathFromRelation( *pRelation ) : OUString();
+}
+
+OUString Relations::getFragmentPathFromFirstType( std::u16string_view rType ) const
+{
+    const Relation* pRelation = getRelationFromFirstType( rType );
+    return pRelation ? getFragmentPathFromRelation( *pRelation ) : OUString();
+}
+
+OUString Relations::getFragmentPathFromFirstTypeFromOfficeDoc( std::u16string_view rType ) const
+{
+    OUString aTransitionalType(createOfficeDocRelationTypeTransitional(rType));
+    const Relation* pRelation = getRelationFromFirstType( aTransitionalType );
+    if(!pRelation)
+    {
+        OUString aStrictType = createOfficeDocRelationTypeStrict(rType);
+        pRelation = getRelationFromFirstType( aStrictType );
+    }
+    return pRelation ? getFragmentPathFromRelation( *pRelation ) : OUString();
+}
+
+} // namespace oox::core
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */