oox/source/core/relations.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <sal/config.h>
  21
  22 #include <algorithm>
  23 #include <string_view>
  24
  25 #include <oox/core/relations.hxx>
  26 #include <utility>
  27
  28 namespace oox::core {
  29
  30 namespace {
  31
  32 std::u16string_view lclRemoveFileName( std::u16string_view rPath )
  33 {
  34     size_t idx = rPath.rfind( '/' );
  35     if (idx == std::u16string_view::npos)
  36         return std::u16string_view();
  37     return rPath.substr( 0, idx );
  38 }
  39
  40 OUString lclAppendFileName( std::u16string_view rPath, const OUString& rFileName )
  41 {
  42     return rPath.empty() ? rFileName :
  43         rPath + OUStringChar('/') + rFileName;
  44 }
  45
  46 OUString createOfficeDocRelationTypeTransitional(std::u16string_view rType)
  47 {
  48     return OUString::Concat("http://schemas.openxmlformats.org/officeDocument/2006/relationships/")
  49         + rType;
  50 }
  51
  52 OUString createOfficeDocRelationTypeStrict(std::u16string_view rType)
  53 {
  54     return OUString::Concat("http://purl.oclc.org/ooxml/officeDocument/relationships/") + rType;
  55 }
  56
  57 }
  58
  59 Relations::Relations( OUString aFragmentPath )
  60     : maFragmentPath(std::move( aFragmentPath ))
  61 {
  62 }
  63
  64 const Relation* Relations::getRelationFromRelId( const OUString& rId ) const
  65 {
  66     ::std::map< OUString, Relation >::const_iterator aIt = maMap.find( rId );
  67     return (aIt == maMap.end()) ? nullptr : &aIt->second;
  68 }
  69
  70 const Relation* Relations::getRelationFromFirstType( std::u16string_view rType ) const
  71 {
  72     for (auto const& elem : maMap)
  73         if( elem.second.maType.equalsIgnoreAsciiCase( rType ) )
  74             return &elem.second;
  75     return nullptr;
  76 }
  77
  78 RelationsRef Relations::getRelationsFromTypeFromOfficeDoc( std::u16string_view rType ) const
  79 {
  80     RelationsRef xRelations = std::make_shared<Relations>( maFragmentPath );
  81     for (auto const& elem : maMap)
  82         if( elem.second.maType.equalsIgnoreAsciiCase( createOfficeDocRelationTypeTransitional(rType) ) ||
  83                 elem.second.maType.equalsIgnoreAsciiCase( createOfficeDocRelationTypeStrict(rType) ))
  84             xRelations->maMap[ elem.first ] = elem.second;
  85     return xRelations;
  86 }
  87
  88 OUString Relations::getExternalTargetFromRelId( const OUString& rRelId ) const
  89 {
  90     const Relation* pRelation = getRelationFromRelId( rRelId );
  91     return (pRelation && pRelation->mbExternal) ? pRelation->maTarget : OUString();
  92 }
  93
  94 OUString Relations::getInternalTargetFromRelId( const OUString& rRelId ) const
  95 {
  96     const Relation* pRelation = getRelationFromRelId( rRelId );
  97     return (pRelation && !pRelation->mbExternal) ? pRelation->maTarget : OUString();
  98 }
  99
 100 OUString Relations::getFragmentPathFromRelation( const Relation& rRelation ) const
 101 {
 102     // no target, no fragment path
 103     if( rRelation.mbExternal || rRelation.maTarget.isEmpty() )
 104         return OUString();
 105
 106     // absolute target: return it without leading slash (#i100978)
 107     if( rRelation.maTarget[ 0 ] == '/' )
 108         return rRelation.maTarget.copy( 1 );
 109
 110     // empty fragment path: return target
 111     if( maFragmentPath.isEmpty() )
 112         return rRelation.maTarget;
 113
 114     // resolve relative target path according to base path
 115     OUString aPath( lclRemoveFileName( maFragmentPath ) );
 116     sal_Int32 nStartPos = 0;
 117     while( nStartPos < rRelation.maTarget.getLength() )
 118     {
 119         sal_Int32 nSepPos = rRelation.maTarget.indexOf( '/', nStartPos );
 120         if( nSepPos < 0 ) nSepPos = rRelation.maTarget.getLength();
 121         // append next directory name from aTarget to aPath, or remove last directory on '../'
 122         if( (nStartPos + 2 == nSepPos) && (rRelation.maTarget[ nStartPos ] == '.') && (rRelation.maTarget[ nStartPos + 1 ] == '.') )
 123             aPath = lclRemoveFileName( aPath );
 124         else
 125             aPath = lclAppendFileName( aPath, rRelation.maTarget.copy( nStartPos, nSepPos - nStartPos ) );
 126         // move nStartPos to next directory name
 127         nStartPos = nSepPos + 1;
 128     }
 129
 130     return aPath;
 131 }
 132
 133 OUString Relations::getFragmentPathFromRelId( const OUString& rRelId ) const
 134 {
 135     const Relation* pRelation = getRelationFromRelId( rRelId );
 136     return pRelation ? getFragmentPathFromRelation( *pRelation ) : OUString();
 137 }
 138
 139 OUString Relations::getFragmentPathFromFirstType( std::u16string_view rType ) const
 140 {
 141     const Relation* pRelation = getRelationFromFirstType( rType );
 142     return pRelation ? getFragmentPathFromRelation( *pRelation ) : OUString();
 143 }
 144
 145 OUString Relations::getFragmentPathFromFirstTypeFromOfficeDoc( std::u16string_view rType ) const
 146 {
 147     OUString aTransitionalType(createOfficeDocRelationTypeTransitional(rType));
 148     const Relation* pRelation = getRelationFromFirstType( aTransitionalType );
 149     if(!pRelation)
 150     {
 151         OUString aStrictType = createOfficeDocRelationTypeStrict(rType);
 152         pRelation = getRelationFromFirstType( aStrictType );
 153     }
 154     return pRelation ? getFragmentPathFromRelation( *pRelation ) : OUString();
 155 }
 156
 157 } // namespace oox::core
 158
 159 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */