filter/source/xsltfilter/OleHandler.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2
   3 /*
   4  * This file is part of the LibreOffice project.
   5  *
   6  * This Source Code Form is subject to the terms of the Mozilla Public
   7  * License, v. 2.0. If a copy of the MPL was not distributed with this
   8  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   9  */
  10
  11 #ifndef INCLUDED_FILTER_SOURCE_XSLTFILTER_OLEHANDLER_HXX
  12 #define INCLUDED_FILTER_SOURCE_XSLTFILTER_OLEHANDLER_HXX
  13 #include <cstdio>
  14 #include <cstring>
  15 #include <map>
  16 #include <vector>
  17 #include <iostream>
  18 #include <libxml/parser.h>
  19 #include <libxml/tree.h>
  20 #include <libxml/xmlIO.h>
  21 #include <libxslt/transform.h>
  22 #include <libxslt/xsltutils.h>
  23 #include <libxslt/variables.h>
  24
  25 #include <cppuhelper/factory.hxx>
  26 #include <osl/module.h>
  27 #include <osl/file.hxx>
  28 #include <osl/process.h>
  29 #include <com/sun/star/lang/XComponent.hpp>
  30 #include <com/sun/star/lang/XInitialization.hpp>
  31 #include <com/sun/star/beans/NamedValue.hpp>
  32 #include <com/sun/star/container/XNameContainer.hpp>
  33 #include <com/sun/star/io/XInputStream.hpp>
  34 #include <com/sun/star/io/XOutputStream.hpp>
  35 #include <com/sun/star/io/XStream.hpp>
  36
  37 using namespace ::com::sun::star::uno;
  38 using namespace ::com::sun::star::lang;
  39 using namespace ::com::sun::star::container;
  40 using namespace ::com::sun::star::io;
  41
  42 namespace XSLT
  43 {
  44     /*
  45      * OleHandler provides implementations for the XSLT extension functions used by the WordML 2003 XSLT filters.
  46      *
  47      * The extension functions takes base64 encoded string representations of embedded OLE objects provided by the XML filter framework,
  48      * stores them into a com.sun.star.embed.OLESimpleStorage and retrieves them later as individual base64 OLE objects.
  49      *
  50      * The implementation is ported from the former Java based implementation XSLTOleExtrater (sic)
  51      *
  52      * I believe the whole thing should provide round-trip editing of embedded OLE objects.
  53      * I'm not sure if it currently does anything meaningful, because the Java implementation seems to be broken both in OOo and LibO.
  54      *
  55      */
  56     class OleHandler
  57     {
  58     public:
  59         OleHandler(const css::uno::Reference<XComponentContext>& rxContext)
  60             : m_xContext(rxContext)
  61             , m_tcontext(nullptr)
  62         {
  63         }
  64         ~OleHandler()
  65         {
  66             if (m_tcontext)
  67                 m_tcontext->_private = nullptr;
  68         }
  69         void    insertByName(const OUString& streamName, const OString& content);
  70         OString getByName(const OUString& streamName);
  71         void registercontext(xsltTransformContextPtr context)
  72         {
  73             assert(context);
  74             m_tcontext = context;
  75             m_tcontext->_private = this;
  76         }
  77
  78     private:
  79         css::uno::Reference<XComponentContext> m_xContext;
  80         css::uno::Reference<XNameContainer> m_storage;
  81         css::uno::Reference<XStream> m_rootStream;
  82         xsltTransformContextPtr m_tcontext;
  83
  84         void    ensureCreateRootStorage();
  85         OString encodeSubStorage(const OUString& streamName);
  86         void    insertSubStorage(const OUString& streamName, const OString& content);
  87         void    initRootStorageFromBase64(const OString& content);
  88         css::uno::Reference<XStream> createTempFile();
  89     };
  90 }
  91
  92 #endif // INCLUDED_FILTER_SOURCE_XSLTFILTER_OLEHANDLER_HXX
  93
  94 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */