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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 Tor Lillqvist <tlillqvist@suse.com> (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.
*/
#include "oox/mathml/importutils.hxx"
#include <assert.h>
#include <oox/token/tokens.hxx>
#include <oox/token/namespaces.hxx>
using namespace com::sun::star;
namespace oox
{
namespace formulaimport
{
XmlStream::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, "opening" );
}
XmlStream::Tag XmlStream::checkOpeningTag( int token )
{
return checkTag( OPENING( token ), true, "opening" );
}
void XmlStream::ensureClosingTag( int token )
{
checkTag( CLOSING( token ), false, "closing" );
}
XmlStream::Tag XmlStream::checkTag( int token, bool optional, const char* txt )
{
// either it's the following tag, or find it
int savedPos = pos;
if( currentToken() == token || recoverAndFindTag( token ))
{
Tag ret = currentTag();
moveToNextTag();
return ret; // ok
}
if( optional )
{ // not a problem, just rewind
pos = savedPos;
return Tag();
}
fprintf( stderr, "Expected %s tag %d not found.\n", txt, token );
return Tag();
}
bool XmlStream::recoverAndFindTag( int token )
{
int depth = 0;
for(;
!atEnd();
moveToNextTag())
{
if( depth > 0 ) // we're inside a nested element, skip those
{
if( currentToken() == OPENING( currentToken()))
{
fprintf( stderr, "Skipping opening tag %d\n", currentToken());
++depth;
}
else if( currentToken() == CLOSING( currentToken()))
{ // TODO debug output without the OPENING/CLOSING bits set
fprintf( stderr, "Skipping closing tag %d\n", currentToken());
--depth;
}
else
{
fprintf( stderr, "Malformed token %d\n", 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()))
{
fprintf( stderr, "Skipping opening tag %d\n", currentToken());
++depth;
}
else
abort();
}
fprintf( stderr, "Unexpected end of stream reached.\n" );
return false;
}
void XmlStream::skipElement( int token )
{
int closing = ( token & ~TAG_OPENING ) | TAG_CLOSING; // make it a closing tag
assert( currentToken() == OPENING( token ));
// just find the matching closing tag
if( recoverAndFindTag( closing ))
{
moveToNextTag(); // and skip it too
return;
}
fprintf( stderr, "Expected end of element %d not found.\n", token );
}
void XmlStream::handleUnexpectedTag()
{
if( atEnd())
return;
if( currentToken() == CLOSING( currentToken()))
{
moveToNextTag(); // just skip it
return;
}
skipElement( currentToken()); // otherwise skip the entire element
}
void XmlStreamBuilder::appendOpeningTag( int token, const uno::Reference< xml::sax::XFastAttributeList >& attrs )
{
tags.push_back( Tag( OPENING( token ), attrs ));
}
void XmlStreamBuilder::appendClosingTag( int token )
{
tags.push_back( Tag( CLOSING( token )));
}
void XmlStreamBuilder::appendCharacters( const rtl::OUString& chars )
{
assert( !tags.empty());
tags.back().text = chars;
}
} // namespace
} // namespace
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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