332 lines
11 KiB
C++
332 lines
11 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <oox/core/contexthandler2.hxx>
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#include <oox/core/xmlfilterbase.hxx>
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#include <oox/helper/attributelist.hxx>
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#include <oox/token/namespaces.hxx>
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#include <oox/token/tokens.hxx>
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#include <rtl/ustrbuf.hxx>
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#include <o3tl/safeint.hxx>
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#include <o3tl/string_view.hxx>
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#include <osl/diagnose.h>
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#include <com/sun/star/frame/XModel.hpp>
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#include <com/sun/star/lang/XServiceInfo.hpp>
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namespace oox::core {
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using namespace ::com::sun::star::uno;
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using namespace ::com::sun::star::lang;
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using namespace ::com::sun::star::xml::sax;
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/** Information about a processed element. */
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struct ElementInfo
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{
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OUStringBuffer maChars; /// Collected element characters.
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sal_Int32 mnElement; /// The element identifier.
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bool mbTrimSpaces; /// True = trims leading/trailing spaces from text data.
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explicit ElementInfo() : maChars( 0), mnElement( XML_TOKEN_INVALID ), mbTrimSpaces( false ) {}
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};
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ContextHandler2Helper::ContextHandler2Helper( bool bEnableTrimSpace ) :
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mxContextStack( std::make_shared<ContextStack>() ),
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mnRootStackSize( 0 ),
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mbEnableTrimSpace( bEnableTrimSpace )
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{
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pushElementInfo( XML_ROOT_CONTEXT );
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}
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ContextHandler2Helper::ContextHandler2Helper( const ContextHandler2Helper& rParent ) :
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mxContextStack( rParent.mxContextStack ),
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mnRootStackSize( rParent.mxContextStack->size() ),
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mbEnableTrimSpace( rParent.mbEnableTrimSpace )
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{
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}
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ContextHandler2Helper::~ContextHandler2Helper()
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{
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}
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sal_Int32 ContextHandler2Helper::getCurrentElementWithMce() const
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{
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return mxContextStack->empty() ? XML_ROOT_CONTEXT : mxContextStack->back().mnElement;
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}
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sal_Int32 ContextHandler2Helper::getCurrentElement() const
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{
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auto It = std::find_if(mxContextStack->rbegin(), mxContextStack->rend(),
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[](const ElementInfo& rItem) { return getNamespace(rItem.mnElement) != NMSP_mce; });
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if (It != mxContextStack->rend())
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return It->mnElement;
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return XML_ROOT_CONTEXT;
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}
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sal_Int32 ContextHandler2Helper::getParentElement( sal_Int32 nCountBack ) const
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{
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if( (nCountBack < 0) || (mxContextStack->size() < o3tl::make_unsigned( nCountBack )) )
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return XML_TOKEN_INVALID;
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return (mxContextStack->size() == static_cast< size_t >( nCountBack )) ?
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XML_ROOT_CONTEXT : (*mxContextStack)[ mxContextStack->size() - nCountBack - 1 ].mnElement;
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}
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bool ContextHandler2Helper::isRootElement() const
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{
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return mxContextStack->size() == mnRootStackSize + 1;
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}
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Reference< XFastContextHandler > ContextHandler2Helper::implCreateChildContext(
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sal_Int32 nElement, const Reference< XFastAttributeList >& rxAttribs )
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{
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// #i76091# process collected characters (calls onCharacters() if needed)
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processCollectedChars();
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ContextHandlerRef xContext = onCreateContext( nElement, AttributeList( rxAttribs ) );
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return xContext;
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}
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void ContextHandler2Helper::implStartElement( sal_Int32 nElement, const Reference< XFastAttributeList >& rxAttribs )
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{
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AttributeList aAttribs( rxAttribs );
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pushElementInfo( nElement ).mbTrimSpaces = aAttribs.getToken( XML_TOKEN( space ), XML_TOKEN_INVALID ) != XML_preserve;
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onStartElement( aAttribs );
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}
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void ContextHandler2Helper::implCharacters( std::u16string_view rChars )
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{
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// #i76091# collect characters until new element starts or this element ends
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if( !mxContextStack->empty() )
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mxContextStack->back().maChars.append(rChars);
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}
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void ContextHandler2Helper::implEndElement( sal_Int32 nElement )
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{
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OSL_ENSURE( getCurrentElementWithMce() == nElement, "ContextHandler2Helper::implEndElement - context stack broken" );
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if( !mxContextStack->empty() )
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{
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// #i76091# process collected characters (calls onCharacters() if needed)
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processCollectedChars();
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onEndElement();
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popElementInfo();
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}
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}
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ContextHandlerRef ContextHandler2Helper::implCreateRecordContext( sal_Int32 nRecId, SequenceInputStream& rStrm )
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{
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return onCreateRecordContext( nRecId, rStrm );
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}
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void ContextHandler2Helper::implStartRecord( sal_Int32 nRecId, SequenceInputStream& rStrm )
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{
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pushElementInfo( nRecId );
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onStartRecord( rStrm );
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}
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void ContextHandler2Helper::implEndRecord( sal_Int32 nRecId )
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{
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OSL_ENSURE( getCurrentElementWithMce() == nRecId, "ContextHandler2Helper::implEndRecord - context stack broken" );
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if( !mxContextStack->empty() )
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{
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onEndRecord();
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popElementInfo();
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}
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}
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ElementInfo& ContextHandler2Helper::pushElementInfo( sal_Int32 nElement )
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{
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mxContextStack->emplace_back();
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ElementInfo& rInfo = mxContextStack->back();
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rInfo.mnElement = nElement;
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return rInfo;
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}
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void ContextHandler2Helper::popElementInfo()
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{
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OSL_ENSURE( !mxContextStack->empty(), "ContextHandler2Helper::popElementInfo - context stack broken" );
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if( !mxContextStack->empty() )
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mxContextStack->pop_back();
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}
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void ContextHandler2Helper::processCollectedChars()
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{
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OSL_ENSURE( !mxContextStack->empty(), "ContextHandler2Helper::processCollectedChars - no context info" );
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if (mxContextStack->empty())
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return;
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ElementInfo& rInfo = mxContextStack->back();
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if( !rInfo.maChars.isEmpty() )
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{
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OUString aChars = rInfo.maChars.makeStringAndClear();
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if( mbEnableTrimSpace && rInfo.mbTrimSpaces )
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aChars = aChars.trim();
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if( !aChars.isEmpty() )
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onCharacters( aChars );
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}
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}
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ContextHandler2::ContextHandler2( ContextHandler2Helper const & rParent ) :
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ContextHandler( dynamic_cast< ContextHandler const & >( rParent ) ),
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ContextHandler2Helper( rParent )
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{
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}
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ContextHandler2::~ContextHandler2()
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{
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}
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// com.sun.star.xml.sax.XFastContextHandler interface -------------------------
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Reference< XFastContextHandler > SAL_CALL ContextHandler2::createFastChildContext(
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sal_Int32 nElement, const Reference< XFastAttributeList >& rxAttribs )
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{
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if( getNamespace( nElement ) == NMSP_mce ) // TODO for checking 'Ignorable'
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{
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if( prepareMceContext( nElement, AttributeList( rxAttribs ) ) )
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return this;
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return nullptr;
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}
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return implCreateChildContext( nElement, rxAttribs );
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}
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void SAL_CALL ContextHandler2::startFastElement(
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sal_Int32 nElement, const Reference< XFastAttributeList >& rxAttribs )
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{
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implStartElement( nElement, rxAttribs );
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}
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void SAL_CALL ContextHandler2::characters( const OUString& rChars )
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{
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implCharacters( rChars );
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}
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void SAL_CALL ContextHandler2::endFastElement( sal_Int32 nElement )
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{
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implEndElement( nElement );
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}
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bool ContextHandler2Helper::prepareMceContext( sal_Int32 nElement, const AttributeList& rAttribs )
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{
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switch( nElement )
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{
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case MCE_TOKEN( AlternateContent ):
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addMCEState( MCE_STATE::Started );
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break;
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case MCE_TOKEN( Choice ):
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if (!isMCEStateEmpty() && getMCEState() == MCE_STATE::Started)
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{
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OUString aRequires = rAttribs.getStringDefaulted(XML_Requires);
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// At this point we can't access namespaces as the correct xml filter
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// is long gone. For now let's decide depending on a list of supported
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// namespaces like we do in writerfilter
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static constexpr std::u16string_view aSupportedNS[] =
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{
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// u"a14", // We do not currently support inline formulas and other a14 stuff
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u"p14",
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u"p15",
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u"x12ac",
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u"v"
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};
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for (size_t pos = 0; pos != std::u16string_view::npos;)
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{
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// 'Requires' is a space-separated list
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auto ns = o3tl::getToken(aRequires, u' ', pos);
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if (!ns.empty() && std::find(std::begin(aSupportedNS), std::end(aSupportedNS), ns) == std::end(aSupportedNS))
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return false;
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}
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setMCEState( MCE_STATE::FoundChoice ) ;
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break;
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}
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return false;
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case MCE_TOKEN( Fallback ):
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if( !isMCEStateEmpty() && getMCEState() == MCE_STATE::Started )
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break;
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return false;
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default:
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{
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OUString str = rAttribs.getStringDefaulted( MCE_TOKEN( Ignorable ));
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if( !str.isEmpty() )
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{
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// Sequence< css::xml::FastAttribute > attrs = rAttribs.getFastAttributeList()->getFastAttributes();
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// printf("MCE: %s\n", OUStringToOString( str, RTL_TEXTENCODING_UTF8 ).getStr() );
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// TODO: Check & Get the namespaces in "Ignorable"
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// printf("NS: %d : %s\n", attrs.getLength(), OUStringToOString( str, RTL_TEXTENCODING_UTF8 ).getStr() );
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}
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}
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return false;
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}
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return true;
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}
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// oox.core.RecordContext interface -------------------------------------------
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ContextHandlerRef ContextHandler2::createRecordContext( sal_Int32 nRecId, SequenceInputStream& rStrm )
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{
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return implCreateRecordContext( nRecId, rStrm );
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}
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void ContextHandler2::startRecord( sal_Int32 nRecId, SequenceInputStream& rStrm )
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{
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implStartRecord( nRecId, rStrm );
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}
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void ContextHandler2::endRecord( sal_Int32 nRecId )
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{
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implEndRecord( nRecId );
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}
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// oox.core.ContextHandler2Helper interface -----------------------------------
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ContextHandlerRef ContextHandler2::onCreateContext( sal_Int32, const AttributeList& )
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{
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return nullptr;
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}
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void ContextHandler2::onStartElement( const AttributeList& )
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{
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}
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void ContextHandler2::onCharacters( const OUString& )
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{
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}
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void ContextHandler2::onEndElement()
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{
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}
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ContextHandlerRef ContextHandler2::onCreateRecordContext( sal_Int32, SequenceInputStream& )
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{
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return nullptr;
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}
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void ContextHandler2::onStartRecord( SequenceInputStream& )
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{
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}
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void ContextHandler2::onEndRecord()
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{
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}
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} // namespace oox::core
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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