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-rw-r--r--oox/source/mathml/importutils.cxx337
1 files changed, 337 insertions, 0 deletions
diff --git a/oox/source/mathml/importutils.cxx b/oox/source/mathml/importutils.cxx
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+++ b/oox/source/mathml/importutils.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/.
+ */
+
+#include <oox/mathml/importutils.hxx>
+
+#include <assert.h>
+
+#include <com/sun/star/xml/FastAttribute.hpp>
+#include <com/sun/star/xml/sax/XFastAttributeList.hpp>
+#include <oox/token/tokenmap.hxx>
+#include <oox/token/tokens.hxx>
+#include <oox/token/namespaces.hxx>
+#include <rtl/ustring.hxx>
+#include <sal/log.hxx>
+
+#define OPENING( token ) XML_STREAM_OPENING( token )
+#define CLOSING( token ) XML_STREAM_CLOSING( token )
+
+using namespace com::sun::star;
+
+namespace oox::formulaimport
+{
+
+namespace
+{
+// a class that inherits from AttributeList, builds the internal data and then will be sliced off
+// during conversion to the base class
+class AttributeListBuilder
+ : public XmlStream::AttributeList
+{
+public:
+ explicit AttributeListBuilder( const uno::Reference< xml::sax::XFastAttributeList >& a );
+};
+
+AttributeListBuilder::AttributeListBuilder( const uno::Reference< xml::sax::XFastAttributeList >& a )
+{
+ if( !a )
+ return;
+ const uno::Sequence< xml::FastAttribute > aFastAttrSeq = a->getFastAttributes();
+ for( const xml::FastAttribute& rFastAttr : aFastAttrSeq )
+ {
+ attrs[ rFastAttr.Token ] = rFastAttr.Value;
+ }
+}
+
+OString tokenToString( int token )
+{
+ uno::Sequence< sal_Int8 > const & aTokenNameSeq = StaticTokenMap().getUtf8TokenName( token & TOKEN_MASK );
+ OString tokenname( reinterpret_cast< const char* >( aTokenNameSeq.getConstArray() ), aTokenNameSeq.getLength() );
+ if( tokenname.isEmpty())
+ tokenname = "???";
+ int nmsp = ( token & NMSP_MASK & ~( TAG_OPENING | TAG_CLOSING ));
+#if 0 // this is awfully long
+ OString namespacename = StaticNamespaceMap::get().count( nmsp ) != 0
+ ? StaticNamespaceMap::get()[ nmsp ] : OString( "???" );
+#else
+ OString namespacename;
+ // only few are needed actually
+ switch( nmsp )
+ {
+ case NMSP_officeMath:
+ namespacename = "m";
+ break;
+ case NMSP_doc:
+ namespacename = "w";
+ break;
+ default:
+ namespacename = "?";
+ break;
+ }
+#endif
+ if( token == OPENING( token ))
+ return "<" + namespacename + ":" + tokenname + ">";
+ if( token == CLOSING( token ))
+ return "</" + namespacename + ":" + tokenname + ">";
+ // just the name itself, not specified whether opening or closing
+ return namespacename + ":" + tokenname;
+}
+
+} // namespace
+
+OUString& XmlStream::AttributeList::operator[] (int token)
+{
+ return attrs[token];
+}
+
+OUString XmlStream::AttributeList::attribute( int token, const OUString& def ) const
+{
+ std::map< int, OUString >::const_iterator find = attrs.find( token );
+ if( find != attrs.end())
+ return find->second;
+ return def;
+}
+
+bool XmlStream::AttributeList::attribute( int token, bool def ) const
+{
+ std::map< int, OUString >::const_iterator find = attrs.find( token );
+ if( find != attrs.end())
+ {
+ const OUString sValue = find->second;
+ if( sValue.equalsIgnoreAsciiCase("true") ||
+ sValue.equalsIgnoreAsciiCase("on") ||
+ sValue.equalsIgnoreAsciiCase("t") ||
+ sValue.equalsIgnoreAsciiCase("1") )
+ return true;
+ if( sValue.equalsIgnoreAsciiCase("false") ||
+ sValue.equalsIgnoreAsciiCase("off") ||
+ sValue.equalsIgnoreAsciiCase("f") ||
+ sValue.equalsIgnoreAsciiCase("0") )
+ return false;
+ SAL_WARN( "oox.xmlstream", "Cannot convert \'" << sValue << "\' to bool." );
+ }
+ return def;
+}
+
+sal_Unicode XmlStream::AttributeList::attribute( int token, sal_Unicode def ) const
+{
+ std::map< int, OUString >::const_iterator find = attrs.find( token );
+ if( find != attrs.end())
+ {
+ if( !find->second.isEmpty() )
+ {
+ if( find->second.getLength() != 1 )
+ SAL_WARN( "oox.xmlstream", "Cannot convert \'" << find->second << "\' to sal_Unicode, stripping." );
+ return find->second[ 0 ];
+ }
+ }
+ return def;
+}
+
+XmlStream::Tag::Tag( int t, const uno::Reference< xml::sax::XFastAttributeList >& a )
+: token( t )
+, attributes( AttributeListBuilder( a ))
+{
+}
+
+XmlStream::Tag::Tag( int t, const AttributeList& a )
+: token( t )
+, attributes( a )
+{
+}
+
+XmlStream::Tag::operator bool() const
+{
+ return token != XML_TOKEN_INVALID;
+}
+
+XmlStream::XmlStream()
+: pos( 0 )
+{
+ // make sure our extra bit does not conflict with values used by oox
+ assert( TAG_OPENING > ( 1024 << NMSP_SHIFT ));
+}
+
+bool XmlStream::atEnd() const
+{
+ return pos >= tags.size();
+}
+
+XmlStream::Tag XmlStream::currentTag() const
+{
+ if( pos >= tags.size())
+ return Tag();
+ return tags[ pos ];
+}
+
+int XmlStream::currentToken() const
+{
+ if( pos >= tags.size())
+ return XML_TOKEN_INVALID;
+ return tags[ pos ].token;
+}
+
+void XmlStream::moveToNextTag()
+{
+ if( pos < tags.size())
+ ++pos;
+}
+
+XmlStream::Tag XmlStream::ensureOpeningTag( int token )
+{
+ return checkTag( OPENING( token ), false );
+}
+
+XmlStream::Tag XmlStream::checkOpeningTag( int token )
+{
+ return checkTag( OPENING( token ), true );
+}
+
+void XmlStream::ensureClosingTag( int token )
+{
+ checkTag( CLOSING( token ), false );
+}
+
+XmlStream::Tag XmlStream::checkTag( int token, bool optional )
+{
+ // either it's the following tag, or find it
+ int savedPos = pos;
+ if( optional )
+ { // avoid printing debug messages about skipping tags if the optional one
+ // will not be found and the position will be reset back
+ if( currentToken() != token && !findTagInternal( token, true ))
+ {
+ pos = savedPos;
+ return Tag();
+ }
+ }
+ if( currentToken() == token || findTag( token ))
+ {
+ Tag ret = currentTag();
+ moveToNextTag();
+ return ret; // ok
+ }
+ if( optional )
+ { // not a problem, just rewind
+ pos = savedPos;
+ return Tag();
+ }
+ SAL_WARN( "oox.xmlstream", "Expected tag " << tokenToString( token ) << " not found." );
+ return Tag();
+}
+
+bool XmlStream::findTag( int token )
+{
+ return findTagInternal( token, false );
+}
+
+bool XmlStream::findTagInternal( int token, bool silent )
+{
+ int depth = 0;
+ for(;
+ !atEnd();
+ moveToNextTag())
+ {
+ if( depth > 0 ) // we're inside a nested element, skip those
+ {
+ if( currentToken() == OPENING( currentToken()))
+ {
+ if( !silent )
+ SAL_INFO( "oox.xmlstream", "Skipping tag " << tokenToString( currentToken()));
+ ++depth;
+ }
+ else if( currentToken() == CLOSING( currentToken()))
+ {
+ if( !silent )
+ SAL_INFO( "oox.xmlstream", "Skipping tag " << tokenToString( currentToken()));
+ --depth;
+ }
+ else
+ {
+ if( !silent )
+ SAL_WARN( "oox.xmlstream", "Malformed token " << currentToken() << " ("
+ << tokenToString( currentToken()) << ")" );
+ abort();
+ }
+ continue;
+ }
+ if( currentToken() == token )
+ return true; // ok, found
+ if( currentToken() == CLOSING( currentToken()))
+ return false; // that would be leaving current element, so not found
+ if( currentToken() == OPENING( currentToken()))
+ {
+ if( !silent )
+ SAL_INFO( "oox.xmlstream", "Skipping tag " << tokenToString( currentToken()));
+ ++depth;
+ }
+ else
+ abort();
+ }
+ if( !silent )
+ SAL_WARN( "oox.xmlstream", "Unexpected end of stream reached." );
+ return false;
+}
+
+void XmlStream::skipElementInternal( int token, bool silent )
+{
+ int closing = ( token & ~TAG_OPENING ) | TAG_CLOSING; // make it a closing tag
+ assert( currentToken() == OPENING( token ));
+ if( !silent )
+ SAL_INFO( "oox.xmlstream", "Skipping unexpected element " << tokenToString( currentToken()));
+ moveToNextTag();
+ // and just find the matching closing tag
+ if( findTag( closing ))
+ {
+ if( !silent )
+ SAL_INFO( "oox.xmlstream", "Skipped unexpected element " << tokenToString( token ));
+ moveToNextTag(); // and skip it too
+ return;
+ }
+ // this one is an unexpected problem, do not silent it
+ SAL_WARN( "oox.xmlstream", "Expected end of element " << tokenToString( token ) << " not found." );
+}
+
+void XmlStream::handleUnexpectedTag()
+{
+ if( atEnd())
+ return;
+ if( currentToken() == CLOSING( currentToken()))
+ {
+ SAL_INFO( "oox.xmlstream", "Skipping unexpected tag " << tokenToString( currentToken()));
+ moveToNextTag(); // just skip it
+ return;
+ }
+ skipElementInternal( currentToken(), false ); // otherwise skip the entire element
+}
+
+void XmlStreamBuilder::appendOpeningTag( int token, const uno::Reference< xml::sax::XFastAttributeList >& attrs )
+{
+ tags.emplace_back( OPENING( token ), attrs );
+}
+
+void XmlStreamBuilder::appendOpeningTag( int token, const AttributeList& attrs )
+{
+ tags.emplace_back( OPENING( token ), attrs );
+}
+
+void XmlStreamBuilder::appendClosingTag( int token )
+{
+ tags.emplace_back( CLOSING( token ));
+}
+
+void XmlStreamBuilder::appendCharacters( std::u16string_view chars )
+{
+ assert( !tags.empty());
+ tags.back().text += chars;
+}
+
+} // namespace
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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