1 files changed, 340 insertions, 0 deletions
diff --git a/oox/source/core/contexthandler2.cxx b/oox/source/core/contexthandler2.cxx
new file mode 100644
index 000000000..1613a3d33
--- /dev/null
+++ b/oox/source/core/contexthandler2.cxx
@@ -0,0 +1,340 @@
+/* -*- 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/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <oox/core/contexthandler2.hxx>
+#include <oox/core/xmlfilterbase.hxx>
+#include <oox/helper/attributelist.hxx>
+#include <oox/token/namespaces.hxx>
+#include <oox/token/tokens.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <o3tl/safeint.hxx>
+#include <osl/diagnose.h>
+#include <com/sun/star/frame/XModel.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+
+namespace oox::core {
+
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::lang;
+using namespace ::com::sun::star::xml::sax;
+
+/** Information about a processed element. */
+struct ElementInfo
+{
+    OUStringBuffer      maChars;            /// Collected element characters.
+    sal_Int32           mnElement;          /// The element identifier.
+    bool                mbTrimSpaces;       /// True = trims leading/trailing spaces from text data.
+
+    explicit     ElementInfo() : maChars( 0), mnElement( XML_TOKEN_INVALID ), mbTrimSpaces( false ) {}
+};
+
+ContextHandler2Helper::ContextHandler2Helper( bool bEnableTrimSpace, XmlFilterBase& rFilter ) :
+    mxContextStack( std::make_shared<ContextStack>() ),
+    mnRootStackSize( 0 ),
+    mbEnableTrimSpace( bEnableTrimSpace ),
+    mrFilter( rFilter )
+{
+    pushElementInfo( XML_ROOT_CONTEXT );
+}
+
+ContextHandler2Helper::ContextHandler2Helper( const ContextHandler2Helper& rParent ) :
+    mxContextStack( rParent.mxContextStack ),
+    mnRootStackSize( rParent.mxContextStack->size() ),
+    mbEnableTrimSpace( rParent.mbEnableTrimSpace ),
+    mrFilter(rParent.mrFilter)
+{
+}
+
+ContextHandler2Helper::~ContextHandler2Helper()
+{
+}
+
+sal_Int32 ContextHandler2Helper::getCurrentElementWithMce() const
+{
+    return mxContextStack->empty() ? XML_ROOT_CONTEXT : mxContextStack->back().mnElement;
+}
+
+sal_Int32 ContextHandler2Helper::getCurrentElement() const
+{
+    auto It = std::find_if(mxContextStack->rbegin(), mxContextStack->rend(),
+        [](const ElementInfo& rItem) { return getNamespace(rItem.mnElement) != NMSP_mce; });
+    if (It != mxContextStack->rend())
+        return It->mnElement;
+    return XML_ROOT_CONTEXT;
+}
+
+sal_Int32 ContextHandler2Helper::getParentElement( sal_Int32 nCountBack ) const
+{
+    if( (nCountBack < 0) || (mxContextStack->size() < o3tl::make_unsigned( nCountBack )) )
+        return XML_TOKEN_INVALID;
+    return (mxContextStack->size() == static_cast< size_t >( nCountBack )) ?
+        XML_ROOT_CONTEXT : (*mxContextStack)[ mxContextStack->size() - nCountBack - 1 ].mnElement;
+}
+
+bool ContextHandler2Helper::isRootElement() const
+{
+    return mxContextStack->size() == mnRootStackSize + 1;
+}
+
+Reference< XFastContextHandler > ContextHandler2Helper::implCreateChildContext(
+        sal_Int32 nElement, const Reference< XFastAttributeList >& rxAttribs )
+{
+    // #i76091# process collected characters (calls onCharacters() if needed)
+    processCollectedChars();
+    ContextHandlerRef xContext = onCreateContext( nElement, AttributeList( rxAttribs ) );
+    return xContext;
+}
+
+void ContextHandler2Helper::implStartElement( sal_Int32 nElement, const Reference< XFastAttributeList >& rxAttribs )
+{
+    AttributeList aAttribs( rxAttribs );
+    pushElementInfo( nElement ).mbTrimSpaces = aAttribs.getToken( XML_TOKEN( space ), XML_TOKEN_INVALID ) != XML_preserve;
+    onStartElement( aAttribs );
+}
+
+void ContextHandler2Helper::implCharacters( std::u16string_view rChars )
+{
+    // #i76091# collect characters until new element starts or this element ends
+    if( !mxContextStack->empty() )
+        mxContextStack->back().maChars.append(rChars);
+}
+
+void ContextHandler2Helper::implEndElement( sal_Int32 nElement )
+{
+    OSL_ENSURE( getCurrentElementWithMce() == nElement, "ContextHandler2Helper::implEndElement - context stack broken" );
+    if( !mxContextStack->empty() )
+    {
+        // #i76091# process collected characters (calls onCharacters() if needed)
+        processCollectedChars();
+        onEndElement();
+        popElementInfo();
+    }
+}
+
+ContextHandlerRef ContextHandler2Helper::implCreateRecordContext( sal_Int32 nRecId, SequenceInputStream& rStrm )
+{
+    return onCreateRecordContext( nRecId, rStrm );
+}
+
+void ContextHandler2Helper::implStartRecord( sal_Int32 nRecId, SequenceInputStream& rStrm )
+{
+    pushElementInfo( nRecId );
+    onStartRecord( rStrm );
+}
+
+void ContextHandler2Helper::implEndRecord( sal_Int32 nRecId )
+{
+    OSL_ENSURE( getCurrentElementWithMce() == nRecId, "ContextHandler2Helper::implEndRecord - context stack broken" );
+    if( !mxContextStack->empty() )
+    {
+        onEndRecord();
+        popElementInfo();
+    }
+}
+
+ElementInfo& ContextHandler2Helper::pushElementInfo( sal_Int32 nElement )
+{
+    mxContextStack->emplace_back();
+    ElementInfo& rInfo = mxContextStack->back();
+    rInfo.mnElement = nElement;
+    return rInfo;
+}
+
+void ContextHandler2Helper::popElementInfo()
+{
+    OSL_ENSURE( !mxContextStack->empty(), "ContextHandler2Helper::popElementInfo - context stack broken" );
+    if( !mxContextStack->empty() )
+        mxContextStack->pop_back();
+}
+
+void ContextHandler2Helper::processCollectedChars()
+{
+    OSL_ENSURE( !mxContextStack->empty(), "ContextHandler2Helper::processCollectedChars - no context info" );
+    if (mxContextStack->empty())
+        return;
+    ElementInfo& rInfo = mxContextStack->back();
+    if( !rInfo.maChars.isEmpty() )
+    {
+        OUString aChars = rInfo.maChars.makeStringAndClear();
+        if( mbEnableTrimSpace && rInfo.mbTrimSpaces )
+            aChars = aChars.trim();
+        if( !aChars.isEmpty() )
+            onCharacters( aChars );
+    }
+}
+
+ContextHandler2::ContextHandler2( ContextHandler2Helper const & rParent ) :
+    ContextHandler( dynamic_cast< ContextHandler const & >( rParent ) ),
+    ContextHandler2Helper( rParent )
+{
+}
+
+ContextHandler2::~ContextHandler2()
+{
+}
+
+// com.sun.star.xml.sax.XFastContextHandler interface -------------------------
+
+Reference< XFastContextHandler > SAL_CALL ContextHandler2::createFastChildContext(
+        sal_Int32 nElement, const Reference< XFastAttributeList >& rxAttribs )
+{
+    if( getNamespace( nElement ) == NMSP_mce ) // TODO for checking 'Ignorable'
+    {
+        if( prepareMceContext( nElement, AttributeList( rxAttribs ) ) )
+            return this;
+        return nullptr;
+    }
+
+    return implCreateChildContext( nElement, rxAttribs );
+}
+
+void SAL_CALL ContextHandler2::startFastElement(
+        sal_Int32 nElement, const Reference< XFastAttributeList >& rxAttribs )
+{
+    implStartElement( nElement, rxAttribs );
+}
+
+void SAL_CALL ContextHandler2::characters( const OUString& rChars )
+{
+    implCharacters( rChars );
+}
+
+void SAL_CALL ContextHandler2::endFastElement( sal_Int32 nElement )
+{
+    implEndElement( nElement );
+}
+
+bool ContextHandler2Helper::prepareMceContext( sal_Int32 nElement, const AttributeList& rAttribs )
+{
+    switch( nElement )
+    {
+        case MCE_TOKEN( AlternateContent ):
+            addMCEState( MCE_STATE::Started );
+            break;
+
+        case MCE_TOKEN( Choice ):
+            {
+                if (isMCEStateEmpty() || getMCEState() != MCE_STATE::Started)
+                    return false;
+
+                OUString aRequires = rAttribs.getString( XML_Requires, "none" );
+
+                // At this point we can't access namespaces as the correct xml filter
+                // is long gone. For now let's decide depending on a list of supported
+                // namespaces like we do in writerfilter
+
+                std::vector<OUString> aSupportedNS =
+                {
+                    "a14", // Impress needs this to import math formulas.
+                    "p14",
+                    "p15",
+                    "x12ac",
+                    "v"
+                };
+
+                Reference<XServiceInfo> xModel(getDocFilter().getModel(), UNO_QUERY);
+                if (xModel.is() && xModel->supportsService("com.sun.star.sheet.SpreadsheetDocument"))
+                {
+                    // No a14 for Calc documents, it would cause duplicated shapes as-is.
+                    auto it = std::find(aSupportedNS.begin(), aSupportedNS.end(), "a14");
+                    if (it != aSupportedNS.end())
+                    {
+                        aSupportedNS.erase(it);
+                    }
+                }
+
+                if (std::find(aSupportedNS.begin(), aSupportedNS.end(), aRequires) != aSupportedNS.end())
+                    setMCEState( MCE_STATE::FoundChoice ) ;
+                else
+                    return false;
+            }
+            break;
+
+        case MCE_TOKEN( Fallback ):
+            if( !isMCEStateEmpty() && getMCEState() == MCE_STATE::Started )
+                break;
+            return false;
+        default:
+            {
+                OUString str = rAttribs.getString( MCE_TOKEN( Ignorable ), OUString() );
+                if( !str.isEmpty() )
+                {
+                    // Sequence< css::xml::FastAttribute > attrs = rAttribs.getFastAttributeList()->getFastAttributes();
+                    // printf("MCE: %s\n", OUStringToOString( str, RTL_TEXTENCODING_UTF8 ).getStr() );
+                    // TODO: Check & Get the namespaces in "Ignorable"
+                    // printf("NS: %d : %s\n", attrs.getLength(), OUStringToOString( str, RTL_TEXTENCODING_UTF8 ).getStr() );
+                }
+            }
+            return false;
+    }
+    return true;
+}
+
+// oox.core.RecordContext interface -------------------------------------------
+
+ContextHandlerRef ContextHandler2::createRecordContext( sal_Int32 nRecId, SequenceInputStream& rStrm )
+{
+    return implCreateRecordContext( nRecId, rStrm );
+}
+
+void ContextHandler2::startRecord( sal_Int32 nRecId, SequenceInputStream& rStrm )
+{
+    implStartRecord( nRecId, rStrm );
+}
+
+void ContextHandler2::endRecord( sal_Int32 nRecId )
+{
+    implEndRecord( nRecId );
+}
+
+// oox.core.ContextHandler2Helper interface -----------------------------------
+
+ContextHandlerRef ContextHandler2::onCreateContext( sal_Int32, const AttributeList& )
+{
+    return nullptr;
+}
+
+void ContextHandler2::onStartElement( const AttributeList& )
+{
+}
+
+void ContextHandler2::onCharacters( const OUString& )
+{
+}
+
+void ContextHandler2::onEndElement()
+{
+}
+
+ContextHandlerRef ContextHandler2::onCreateRecordContext( sal_Int32, SequenceInputStream& )
+{
+    return nullptr;
+}
+
+void ContextHandler2::onStartRecord( SequenceInputStream& )
+{
+}
+
+void ContextHandler2::onEndRecord()
+{
+}
+
+} // namespace oox::core
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */