oox/source/mathml/importutils.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
  10 #include "oox/mathml/importutils.hxx"
  11
  12 #include <assert.h>
  13 #include <stdio.h>
  14
  15 #include <oox/token/namespacemap.hxx>
  16 #include <oox/token/tokenmap.hxx>
  17 #include <oox/token/tokens.hxx>
  18 #include <oox/token/namespaces.hxx>
  19 #include <rtl/ustring.hxx>
  20
  21 #define OPENING( token ) XML_STREAM_OPENING( token )
  22 #define CLOSING( token ) XML_STREAM_CLOSING( token )
  23
  24 using namespace com::sun::star;
  25
  26 namespace oox
  27 {
  28
  29 namespace formulaimport
  30 {
  31
  32 namespace
  33 {
  34 // a class that inherits from AttributeList, builds the internal data and then will be sliced off
  35 // during conversion to the base class
  36 class AttributeListBuilder
  37     : public XmlStream::AttributeList
  38 {
  39 public:
  40     AttributeListBuilder( const uno::Reference< xml::sax::XFastAttributeList >& a );
  41 };
  42
  43 AttributeListBuilder::AttributeListBuilder( const uno::Reference< xml::sax::XFastAttributeList >& a )
  44 {
  45     if( a.get() == NULL )
  46         return;
  47     uno::Sequence< xml::FastAttribute > aFastAttrSeq = a->getFastAttributes();
  48     const xml::FastAttribute* pFastAttr = aFastAttrSeq.getConstArray();
  49     sal_Int32 nFastAttrLength = aFastAttrSeq.getLength();
  50     for( int i = 0;
  51          i < nFastAttrLength;
  52          ++i )
  53     {
  54         attrs[ pFastAttr[ i ].Token ] = pFastAttr[ i ].Value;
  55     }
  56 }
  57
  58 static OUString tokenToString( int token )
  59 {
  60     OUString tokenname = StaticTokenMap::get().getUnicodeTokenName( token & TOKEN_MASK );
  61     if( tokenname.isEmpty())
  62         tokenname = "???";
  63     int nmsp = ( token & NMSP_MASK & ~( TAG_OPENING | TAG_CLOSING ));
  64 #if 0 // this is awfully long
  65     OUString namespacename = StaticNamespaceMap::get().count( nmsp ) != 0
  66         ? StaticNamespaceMap::get()[ nmsp ] : OUString( "???" );
  67 #else
  68     OUString namespacename;
  69     // only few are needed actually
  70     switch( nmsp )
  71     {
  72         case NMSP_officeMath:
  73             namespacename = "m";
  74             break;
  75         case NMSP_doc:
  76             namespacename = "w";
  77             break;
  78         default:
  79             namespacename = "?";
  80             break;
  81     }
  82 #endif
  83     if( token == OPENING( token ))
  84         return "<" + namespacename + ":" + tokenname + ">";
  85     if( token == CLOSING( token ))
  86         return "</" + namespacename + ":" + tokenname + ">";
  87     // just the name itself, not specified whether opening or closing
  88     return namespacename + ":" + tokenname;
  89 }
  90
  91 } // namespace
  92
  93 OUString& XmlStream::AttributeList::operator[] (int token)
  94 {
  95     return attrs[token];
  96 }
  97
  98 OUString XmlStream::AttributeList::attribute( int token, const OUString& def ) const
  99 {
 100     std::map< int, OUString >::const_iterator find = attrs.find( token );
 101     if( find != attrs.end())
 102         return find->second;
 103     return def;
 104 }
 105
 106 bool XmlStream::AttributeList::attribute( int token, bool def ) const
 107 {
 108     std::map< int, OUString >::const_iterator find = attrs.find( token );
 109     if( find != attrs.end())
 110     {
 111         const OUString sValue = find->second;
 112         if( sValue.equalsIgnoreAsciiCase("true") ||
 113             sValue.equalsIgnoreAsciiCase("on") ||
 114             sValue.equalsIgnoreAsciiCase("t") ||
 115             sValue.equalsIgnoreAsciiCase("1") )
 116             return true;
 117         if( sValue.equalsIgnoreAsciiCase("false") ||
 118             sValue.equalsIgnoreAsciiCase("off") ||
 119             sValue.equalsIgnoreAsciiCase("f") ||
 120             sValue.equalsIgnoreAsciiCase("0") )
 121             return false;
 122         SAL_WARN( "oox.xmlstream", "Cannot convert \'" << sValue << "\' to bool." );
 123     }
 124     return def;
 125 }
 126
 127 sal_Unicode XmlStream::AttributeList::attribute( int token, sal_Unicode def ) const
 128 {
 129     std::map< int, OUString >::const_iterator find = attrs.find( token );
 130     if( find != attrs.end())
 131     {
 132         if( !find->second.isEmpty() )
 133         {
 134             if( find->second.getLength() != 1 )
 135                 SAL_WARN( "oox.xmlstream", "Cannot convert \'" << find->second << "\' to sal_Unicode, stripping." );
 136             return find->second[ 0 ];
 137         }
 138     }
 139     return def;
 140 }
 141
 142 XmlStream::Tag::Tag( int t, const uno::Reference< xml::sax::XFastAttributeList >& a, const OUString& txt )
 143 : token( t )
 144 , attributes( AttributeListBuilder( a ))
 145 , text( txt )
 146 {
 147 }
 148
 149 XmlStream::Tag::Tag( int t, const AttributeList& a )
 150 : token( t )
 151 , attributes( a )
 152 {
 153 }
 154
 155
 156 XmlStream::Tag::operator bool() const
 157 {
 158     return token != XML_TOKEN_INVALID;
 159 }
 160
 161 XmlStream::XmlStream()
 162 : pos( 0 )
 163 {
 164     // make sure our extra bit does not conflict with values used by oox
 165     assert( TAG_OPENING > ( 1024 << NMSP_SHIFT ));
 166 }
 167
 168 bool XmlStream::atEnd() const
 169 {
 170     return pos >= tags.size();
 171 }
 172
 173 XmlStream::Tag XmlStream::currentTag() const
 174 {
 175     if( pos >= tags.size())
 176         return Tag();
 177     return tags[ pos ];
 178 }
 179
 180 int XmlStream::currentToken() const
 181 {
 182     if( pos >= tags.size())
 183         return XML_TOKEN_INVALID;
 184     return tags[ pos ].token;
 185 }
 186
 187 void XmlStream::moveToNextTag()
 188 {
 189     if( pos < tags.size())
 190         ++pos;
 191 }
 192
 193 XmlStream::Tag XmlStream::ensureOpeningTag( int token )
 194 {
 195     return checkTag( OPENING( token ), false );
 196 }
 197
 198 XmlStream::Tag XmlStream::checkOpeningTag( int token )
 199 {
 200     return checkTag( OPENING( token ), true );
 201 }
 202
 203 void XmlStream::ensureClosingTag( int token )
 204 {
 205     checkTag( CLOSING( token ), false );
 206 }
 207
 208 XmlStream::Tag XmlStream::checkTag( int token, bool optional )
 209 {
 210     // either it's the following tag, or find it
 211     int savedPos = pos;
 212     if( optional )
 213     { // avoid printing debug messages about skipping tags if the optional one
 214       // will not be found and the position will be reset back
 215         if( currentToken() != token && !findTagInternal( token, true ))
 216         {
 217             pos = savedPos;
 218             return Tag();
 219         }
 220     }
 221     if( currentToken() == token || findTag( token ))
 222     {
 223         Tag ret = currentTag();
 224         moveToNextTag();
 225         return ret; // ok
 226     }
 227     if( optional )
 228     { // not a problem, just rewind
 229         pos = savedPos;
 230         return Tag();
 231     }
 232     SAL_WARN( "oox.xmlstream", "Expected tag " << tokenToString( token ) << " not found." );
 233     return Tag();
 234 }
 235
 236 bool XmlStream::findTag( int token )
 237 {
 238     return findTagInternal( token, false );
 239 }
 240
 241 bool XmlStream::findTagInternal( int token, bool silent )
 242 {
 243     int depth = 0;
 244     for(;
 245          !atEnd();
 246          moveToNextTag())
 247     {
 248         if( depth > 0 ) // we're inside a nested element, skip those
 249         {
 250             if( currentToken() == OPENING( currentToken()))
 251             {
 252                 if( !silent )
 253                     SAL_INFO( "oox.xmlstream", "Skipping tag " << tokenToString( currentToken()));
 254                 ++depth;
 255             }
 256             else if( currentToken() == CLOSING( currentToken()))
 257             {
 258                 if( !silent )
 259                     SAL_INFO( "oox.xmlstream", "Skipping tag " << tokenToString( currentToken()));
 260                 --depth;
 261             }
 262             else
 263             {
 264                 if( !silent )
 265                     SAL_WARN( "oox.xmlstream", "Malformed token " << currentToken() << " ("
 266                         << tokenToString( currentToken()) << ")" );
 267                 abort();
 268             }
 269             continue;
 270         }
 271         if( currentToken() == token )
 272             return true; // ok, found
 273         if( currentToken() == CLOSING( currentToken()))
 274             return false; // that would be leaving current element, so not found
 275         if( currentToken() == OPENING( currentToken()))
 276         {
 277             if( !silent )
 278                 SAL_INFO( "oox.xmlstream", "Skipping tag " << tokenToString( currentToken()));
 279             ++depth;
 280         }
 281         else
 282             abort();
 283     }
 284     if( !silent )
 285         SAL_WARN( "oox.xmlstream", "Unexpected end of stream reached." );
 286     return false;
 287 }
 288
 289 void XmlStream::skipElementInternal( int token, bool silent )
 290 {
 291     int closing = ( token & ~TAG_OPENING ) | TAG_CLOSING; // make it a closing tag
 292     assert( currentToken() == OPENING( token ));
 293     if( !silent )
 294         SAL_INFO( "oox.xmlstream", "Skipping unexpected element " << tokenToString( currentToken()));
 295     moveToNextTag();
 296     // and just find the matching closing tag
 297     if( findTag( closing ))
 298     {
 299         if( !silent )
 300             SAL_INFO( "oox.xmlstream", "Skipped unexpected element " << tokenToString( token ));
 301         moveToNextTag(); // and skip it too
 302         return;
 303     }
 304     // this one is an unexpected problem, do not silent it
 305     SAL_WARN( "oox.xmlstream", "Expected end of element " << tokenToString( token ) << " not found." );
 306 }
 307
 308 void XmlStream::handleUnexpectedTag()
 309 {
 310     if( atEnd())
 311         return;
 312     if( currentToken() == CLOSING( currentToken()))
 313     {
 314         SAL_INFO( "oox.xmlstream", "Skipping unexpected tag " << tokenToString( currentToken()));
 315         moveToNextTag(); // just skip it
 316         return;
 317     }
 318     skipElementInternal( currentToken(), false ); // otherwise skip the entire element
 319 }
 320
 321
 322 void XmlStreamBuilder::appendOpeningTag( int token, const uno::Reference< xml::sax::XFastAttributeList >& attrs )
 323 {
 324     tags.push_back( Tag( OPENING( token ), attrs ));
 325 }
 326
 327 void XmlStreamBuilder::appendOpeningTag( int token, const AttributeList& attrs )
 328 {
 329     tags.push_back( Tag( OPENING( token ), attrs ));
 330 }
 331
 332 void XmlStreamBuilder::appendClosingTag( int token )
 333 {
 334     tags.push_back( Tag( CLOSING( token )));
 335 }
 336
 337 void XmlStreamBuilder::appendCharacters( const OUString& chars )
 338 {
 339     assert( !tags.empty());
 340     tags.back().text += chars;
 341 }
 342
 343 } // namespace
 344 } // namespace
 345
 346 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */