include/comphelper/seekableinput.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 #ifndef INCLUDED_COMPHELPER_SEEKABLEINPUT_HXX
  20 #define INCLUDED_COMPHELPER_SEEKABLEINPUT_HXX
  21
  22 #include <osl/mutex.hxx>
  23 #include <com/sun/star/uno/Reference.hxx>
  24 #include <com/sun/star/uno/XComponentContext.hpp>
  25 #include <com/sun/star/io/XInputStream.hpp>
  26 #include <com/sun/star/io/XSeekable.hpp>
  27 #include <cppuhelper/implbase.hxx>
  28 #include <comphelper/comphelperdllapi.h>
  29
  30 namespace comphelper
  31 {
  32
  33 class SAL_DLLPUBLIC_TEMPLATE OSeekableInputWrapper_BASE
  34     : public ::cppu::WeakImplHelper< css::io::XInputStream,
  35                                      css::io::XSeekable >
  36 {};
  37
  38 class COMPHELPER_DLLPUBLIC OSeekableInputWrapper
  39     : public OSeekableInputWrapper_BASE
  40 {
  41     ::osl::Mutex    m_aMutex;
  42
  43     css::uno::Reference< css::uno::XComponentContext > m_xContext;
  44
  45     css::uno::Reference< css::io::XInputStream > m_xOriginalStream;
  46
  47     css::uno::Reference< css::io::XInputStream > m_xCopyInput;
  48     css::uno::Reference< css::io::XSeekable > m_xCopySeek;
  49
  50 private:
  51     COMPHELPER_DLLPRIVATE void PrepareCopy_Impl();
  52
  53 public:
  54     OSeekableInputWrapper(
  55                 const css::uno::Reference< css::io::XInputStream >& xInStream,
  56                 const css::uno::Reference< css::uno::XComponentContext >& rxContext );
  57
  58     virtual ~OSeekableInputWrapper() override;
  59
  60     static css::uno::Reference< css::io::XInputStream > CheckSeekableCanWrap(
  61                         const css::uno::Reference< css::io::XInputStream >& xInStream,
  62                         const css::uno::Reference< css::uno::XComponentContext >& rxContext );
  63
  64 // XInputStream
  65     virtual sal_Int32 SAL_CALL readBytes( css::uno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead ) override;
  66     virtual sal_Int32 SAL_CALL readSomeBytes( css::uno::Sequence< sal_Int8 >& aData, 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 // XSeekable
  72     virtual void SAL_CALL seek( sal_Int64 location ) override;
  73     virtual sal_Int64 SAL_CALL getPosition() override;
  74     virtual sal_Int64 SAL_CALL getLength() override;
  75
  76 };
  77
  78 }   // namespace comphelper
  79
  80 #endif
  81
  82 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */