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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* Version: MPL 1.1 / GPLv3+ / LGPLv3+
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License or as specified alternatively below. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* Major Contributor(s):
* Copyright (C) 2011 Lubos Lunak <l.lunak@suse.cz> (initial developer)
*
* All Rights Reserved.
*
* For minor contributions see the git repository.
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 3 or later (the "GPLv3+"), or
* the GNU Lesser General Public License Version 3 or later (the "LGPLv3+"),
* in which case the provisions of the GPLv3+ or the LGPLv3+ are applicable
* instead of those above.
*/
// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_starmath.hxx"
#include "ooxmlimport.hxx"
#include <oox/token/tokens.hxx>
#include <oox/token/namespaces.hxx>
using namespace oox;
using namespace ooxmlformulaimport;
using rtl::OUString;
/*
The primary internal data structure for the formula is the text representation
(the SmNode tree is built from it), so read data must be converted into this format.
*/
#define M_TOKEN( token ) OOX_TOKEN( officeMath, token )
#define OPENING_TAG( token ) OPENING( token )
#define CLOSING_TAG( token ) CLOSING( token )
// *sigh*
#define STR( str ) OUString( RTL_CONSTASCII_USTRINGPARAM( str ))
// TODO create IS_OPENING(), IS_CLOSING() instead of doing 'next == OPENING( next )' ?
SmOoxmlImport::SmOoxmlImport( ooxmlformulaimport::XmlStream& s )
: stream( s )
{
}
OUString SmOoxmlImport::ConvertToStarMath()
{
return handleStream();
}
// "toplevel" of reading, there will be oMath (if there was oMathPara, that was
// up to the parent component to handle)
// NOT complete
OUString SmOoxmlImport::handleStream()
{
checkOpeningTag( M_TOKEN( oMath ));
OUString ret;
bool out = false;
while( !out && !stream.nextIsEnd())
{
switch( stream.peekNextToken())
{
case OPENING( M_TOKEN( f )):
ret += STR( " " ) + handleF();
break;
case CLOSING( M_TOKEN( oMath )):
out = true;
break;
default:
handleUnexpectedTag();
break;
}
}
checkClosingTag( M_TOKEN( oMath ));
return ret;
}
// NOT complete
OUString SmOoxmlImport::handleF()
{
checkOpeningTag( M_TOKEN( f ));
if( stream.peekNextToken() == OPENING_TAG( M_TOKEN( fPr )))
{
// TODO
}
checkOpeningTag( M_TOKEN( num ));
OUString num = readR();
checkClosingTag( M_TOKEN( num ));
checkOpeningTag( M_TOKEN( den ));
OUString den = readR();
checkClosingTag( M_TOKEN( den ));
checkClosingTag( M_TOKEN( f ));
return STR( "{" ) + num + STR( "} over {" ) + den + STR( "}" );
}
// NOT complete
OUString SmOoxmlImport::readR()
{
checkOpeningTag( M_TOKEN( r ));
// checkOpeningTag( OOX_TOKEN( doc, rPr ));
// checkOpeningTag( OOX_TOKEN( doc, rFonts ));
// checkClosingTag( OOX_TOKEN( doc, rFonts ));
// checkClosingTag( OOX_TOKEN( doc, rPr ));
// TODO can there be more t's ?
checkOpeningTag( M_TOKEN( t ));
OUString text = stream.getCharacters();
if( !stream.getAttributes().getBool( OOX_TOKEN( xml, space ), false ))
text = text.trim();
checkClosingTag( M_TOKEN( t ));
checkClosingTag( M_TOKEN( r ));
return text;
}
void SmOoxmlImport::checkOpeningTag( int token )
{
checkTag( OPENING( token ), "opening" );
}
void SmOoxmlImport::checkClosingTag( int token )
{
checkTag( CLOSING( token ), "closing" );
}
void SmOoxmlImport::checkTag( int token, const char* txt )
{
if( stream.peekNextToken() == token )
{
stream.getNextToken(); // read it
return; // ok
}
if( recoverAndFindTag( token ))
{
stream.getNextToken(); // read it
return; // ok, skipped some tokens
}
fprintf( stderr, "Expected %s tag %d not found.\n", txt, token );
}
bool SmOoxmlImport::recoverAndFindTag( int token )
{
int depth = 0;
for(;;)
{
if( depth > 0 ) // we're inside a nested element, skip those
{
int next = stream.getNextToken();
if( next == OPENING( next ))
{
fprintf( stderr, "Skipping opening tag %d\n", next );
++depth;
}
else if( next == CLOSING( next ))
{ // TODO debug output without the OPENING/CLOSING bits set
fprintf( stderr, "Skipping closing tag %d\n", next );
--depth;
}
else if( next == XML_TOKEN_INVALID ) // end of stream
{
fprintf( stderr, "Unexpected end of stream reached.\n" );
return false;
}
else
{
fprintf( stderr, "Malformed token %d\n", next );
abort();
}
continue;
}
int next = stream.peekNextToken();
if( next == CLOSING( next ))
return false; // that would be leaving current element, so not found
if( next == token )
return true; // ok, found
if( next == OPENING( next ))
{
fprintf( stderr, "Skipping opening tag %d\n", next );
stream.getNextToken();
++depth;
}
else if( next == XML_TOKEN_INVALID )
{
fprintf( stderr, "Unexpected end of stream reached.\n" );
return false;
}
else
abort();
}
}
void SmOoxmlImport::skipElement( int token )
{
int closing = ( token & ~TAG_OPENING ) | TAG_CLOSING; // make it a closing tag
assert( stream.peekNextToken() == OPENING( token ));
// just find the matching closing tag
if( recoverAndFindTag( closing ))
{
stream.getNextToken(); // read it
return;
}
fprintf( stderr, "Expected end of element %d not found.\n", token );
}
void SmOoxmlImport::handleUnexpectedTag()
{
int next = stream.peekNextToken();
if( next == XML_TOKEN_INVALID )
return; // end of stream
if( next == CLOSING( next ))
{
stream.getNextToken(); // just skip it
return;
}
skipElement( stream.peekNextToken());
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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