oox/source/helper/textinputstream.cxx

   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 #include "oox/helper/textinputstream.hxx"
  21
  22 #include <com/sun/star/io/NotConnectedException.hpp>
  23 #include <com/sun/star/io/XActiveDataSink.hpp>
  24 #include <com/sun/star/io/TextInputStream.hpp>
  25 #include <cppuhelper/implbase.hxx>
  26 #include <osl/diagnose.h>
  27 #include <rtl/tencinfo.h>
  28 #include "oox/helper/binaryinputstream.hxx"
  29
  30 namespace oox {
  31
  32 using namespace ::com::sun::star::io;
  33 using namespace ::com::sun::star::lang;
  34 using namespace ::com::sun::star::uno;
  35
  36 namespace {
  37
  38 typedef ::cppu::WeakImplHelper< XInputStream > UnoBinaryInputStream_BASE;
  39
  40 /** Implementation of a UNO input stream wrapping a binary input stream.
  41  */
  42 class UnoBinaryInputStream : public UnoBinaryInputStream_BASE
  43 {
  44 public:
  45     explicit            UnoBinaryInputStream( BinaryInputStream& rInStrm );
  46
  47     virtual sal_Int32 SAL_CALL readBytes( Sequence< sal_Int8 >& rData, sal_Int32 nBytesToRead ) override;
  48     virtual sal_Int32 SAL_CALL readSomeBytes( Sequence< sal_Int8 >& rData, sal_Int32 nMaxBytesToRead ) override;
  49     virtual void SAL_CALL skipBytes( sal_Int32 nBytesToSkip ) override;
  50     virtual sal_Int32 SAL_CALL available() override;
  51     virtual void SAL_CALL closeInput() override;
  52
  53 private:
  54     /// @throws NotConnectedException
  55     void                ensureConnected() const;
  56
  57 private:
  58     BinaryInputStream*  mpInStrm;
  59 };
  60
  61 UnoBinaryInputStream::UnoBinaryInputStream( BinaryInputStream& rInStrm ) :
  62     mpInStrm( &rInStrm )
  63 {
  64 }
  65
  66 sal_Int32 SAL_CALL UnoBinaryInputStream::readBytes( Sequence< sal_Int8 >& rData, sal_Int32 nBytesToRead )
  67 {
  68     ensureConnected();
  69     return mpInStrm->readData( rData, nBytesToRead );
  70 }
  71
  72 sal_Int32 SAL_CALL UnoBinaryInputStream::readSomeBytes( Sequence< sal_Int8 >& rData, sal_Int32 nMaxBytesToRead )
  73 {
  74     ensureConnected();
  75     return mpInStrm->readData( rData, nMaxBytesToRead );
  76 }
  77
  78 void SAL_CALL UnoBinaryInputStream::skipBytes( sal_Int32 nBytesToSkip )
  79 {
  80     ensureConnected();
  81     mpInStrm->skip( nBytesToSkip );
  82 }
  83
  84 sal_Int32 SAL_CALL UnoBinaryInputStream::available()
  85 {
  86     ensureConnected();
  87     throw RuntimeException( "Functionality not supported", Reference< XInputStream >() );
  88 }
  89
  90 void SAL_CALL UnoBinaryInputStream::closeInput()
  91 {
  92     ensureConnected();
  93     mpInStrm->close();
  94     mpInStrm = nullptr;
  95 }
  96
  97 void UnoBinaryInputStream::ensureConnected() const
  98 {
  99     if( !mpInStrm )
 100         throw NotConnectedException( "Stream closed" );
 101 }
 102
 103 } // namespace
 104
 105 TextInputStream::TextInputStream( const Reference< XComponentContext >& rxContext, const Reference< XInputStream >& rxInStrm, rtl_TextEncoding eTextEnc )
 106 {
 107     init( rxContext, rxInStrm, eTextEnc );
 108 }
 109
 110 TextInputStream::TextInputStream( const Reference< XComponentContext >& rxContext, BinaryInputStream& rInStrm, rtl_TextEncoding eTextEnc )
 111 {
 112     init( rxContext, new UnoBinaryInputStream( rInStrm ), eTextEnc );
 113 }
 114
 115 TextInputStream::~TextInputStream()
 116 {
 117 }
 118
 119 bool TextInputStream::isEof() const
 120 {
 121     if( mxTextStrm.is() ) try
 122     {
 123         return mxTextStrm->isEOF();
 124     }
 125     catch (const Exception&)
 126     {
 127     }
 128     return true;
 129 }
 130
 131 OUString TextInputStream::readLine()
 132 {
 133     if( mxTextStrm.is() ) try
 134     {
 135         /*  The function createFinalString() adds a character that may have
 136             been buffered in the previous call of readToChar() (see below). */
 137         return createFinalString( mxTextStrm->readLine() );
 138     }
 139     catch (const Exception&)
 140     {
 141         mxTextStrm.clear();
 142     }
 143     return OUString();
 144 }
 145
 146 OUString TextInputStream::readToChar( sal_Unicode cChar, bool bIncludeChar )
 147 {
 148     if( mxTextStrm.is() ) try
 149     {
 150         Sequence< sal_Unicode > aDelimiters( 1 );
 151         aDelimiters[ 0 ] = cChar;
 152         /*  Always get the delimiter character from the UNO text input stream.
 153             In difference to this implementation, it will not return it in the
 154             next call but silently skip it. If caller specifies to exclude the
 155             character in this call, it will be returned in the next call of one
 156             of the own member functions. The function createFinalString() adds
 157             a character that has been buffered in the previous call. */
 158         OUString aString = createFinalString( mxTextStrm->readString( aDelimiters, false ) );
 159         // remove last character from string and remember it for next call
 160         if( !bIncludeChar && !aString.isEmpty() && (aString[ aString.getLength() - 1 ] == cChar) )
 161         {
 162             mcPendingChar = cChar;
 163             aString = aString.copy( 0, aString.getLength() - 1 );
 164         }
 165         return aString;
 166     }
 167     catch (const Exception&)
 168     {
 169         mxTextStrm.clear();
 170     }
 171     return OUString();
 172 }
 173
 174 Reference< XTextInputStream2 > TextInputStream::createXTextInputStream(
 175         const Reference< XComponentContext >& rxContext, const Reference< XInputStream >& rxInStrm, rtl_TextEncoding eTextEnc )
 176 {
 177     Reference< XTextInputStream2 > xTextStrm;
 178     const char* pcCharset = rtl_getBestMimeCharsetFromTextEncoding( eTextEnc );
 179     OSL_ENSURE( pcCharset, "TextInputStream::createXTextInputStream - unsupported text encoding" );
 180     if( rxContext.is() && rxInStrm.is() && pcCharset ) try
 181     {
 182         xTextStrm = css::io::TextInputStream::create( rxContext );
 183         xTextStrm->setInputStream( rxInStrm );
 184         xTextStrm->setEncoding( OUString::createFromAscii( pcCharset ) );
 185     }
 186     catch (const Exception&)
 187     {
 188     }
 189     return xTextStrm;
 190 }
 191
 192 // private --------------------------------------------------------------------
 193
 194 OUString TextInputStream::createFinalString( const OUString& rString )
 195 {
 196     if( mcPendingChar == 0 )
 197         return rString;
 198
 199     OUString aString = OUStringLiteral1( mcPendingChar ) + rString;
 200     mcPendingChar = 0;
 201     return aString;
 202 }
 203
 204 void TextInputStream::init( const Reference< XComponentContext >& rxContext, const Reference< XInputStream >& rxInStrm, rtl_TextEncoding eTextEnc )
 205 {
 206     mcPendingChar = 0;
 207     mxTextStrm = createXTextInputStream( rxContext, rxInStrm, eTextEnc );
 208 }
 209
 210 } // namespace oox
 211
 212 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */