include/oox/vml/vmlinputstream.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #ifndef INCLUDED_OOX_VML_VMLINPUTSTREAM_HXX
  21 #define INCLUDED_OOX_VML_VMLINPUTSTREAM_HXX
  22
  23 #include <com/sun/star/io/XInputStream.hpp>
  24 #include <com/sun/star/uno/Any.hxx>
  25 #include <com/sun/star/uno/Reference.hxx>
  26 #include <com/sun/star/uno/Sequence.hxx>
  27 #include <cppuhelper/implbase.hxx>
  28 #include <rtl/string.hxx>
  29 #include <sal/types.h>
  30
  31 namespace com { namespace sun { namespace star {
  32     namespace io { class XTextInputStream2; }
  33     namespace uno { class XComponentContext; }
  34 } } }
  35
  36 namespace oox {
  37 namespace vml {
  38
  39
  40 /** An input stream class for VML streams, implementing the UNO interface
  41     com.sun.star.io.XInputStream needed by the Expat XML parsers.
  42
  43     This stream reads the data from the input stream passed to the constructor,
  44     and parses all XML elements for features unsupported by the current Expat
  45     XML parser:
  46
  47     1)  All elements that have the form '<![inst]>' where 'inst' is any string
  48         not containing the characters '<' and '>' are stripped from the input
  49         stream.
  50
  51     2)  Multiple occurrences of the same attribute in an element but the last
  52         are removed.
  53
  54     3)  Line breaks represented by a single <br> element (without matching
  55         </br> element) are replaced by a literal LF character.
  56  */
  57 class InputStream final : public ::cppu::WeakImplHelper< css::io::XInputStream >
  58 {
  59 public:
  60     explicit            InputStream(
  61                             const css::uno::Reference< css::uno::XComponentContext >& rxContext,
  62                             const css::uno::Reference< css::io::XInputStream >& rxInStrm );
  63     virtual             ~InputStream() override;
  64
  65     virtual sal_Int32 SAL_CALL readBytes( css::uno::Sequence< sal_Int8 >& rData, sal_Int32 nBytesToRead ) override;
  66     virtual sal_Int32 SAL_CALL readSomeBytes( css::uno::Sequence< sal_Int8 >& rData, sal_Int32 nMaxBytesToRead ) override;
  67     virtual void SAL_CALL skipBytes( sal_Int32 nBytesToSkip ) override;
  68     virtual sal_Int32 SAL_CALL available() override;
  69     virtual void SAL_CALL closeInput() override;
  70
  71 private:
  72     /// @throws css::io::IOException
  73     /// @throws css::uno::RuntimeException
  74     void                updateBuffer();
  75     /// @throws css::io::IOException
  76     /// @throws css::uno::RuntimeException
  77     OString      readToElementBegin();
  78     /// @throws css::io::IOException
  79     /// @throws css::uno::RuntimeException
  80     OString      readToElementEnd();
  81
  82 private:
  83     css::uno::Reference< css::io::XTextInputStream2 >
  84                         mxTextStrm;
  85     css::uno::Sequence< sal_Unicode > maOpeningBracket;
  86     css::uno::Sequence< sal_Unicode > maClosingBracket;
  87     OString             maBuffer;
  88     sal_Int32           mnBufferPos;
  89 };
  90
  91
  92 } // namespace vml
  93 } // namespace oox
  94
  95 #endif
  96
  97 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */