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/XActiveDataSink.hpp>
  23 #include <com/sun/star/io/TextInputStream.hpp>
  24 #include <cppuhelper/implbase1.hxx>
  25 #include <rtl/tencinfo.h>
  26 #include "oox/helper/binaryinputstream.hxx"
  27
  28 namespace oox {
  29
  30 // ============================================================================
  31
  32 using namespace ::com::sun::star::io;
  33 using namespace ::com::sun::star::lang;
  34 using namespace ::com::sun::star::uno;
  35
  36 // ============================================================================
  37
  38 namespace {
  39
  40 typedef ::cppu::WeakImplHelper1< XInputStream > UnoBinaryInputStream_BASE;
  41
  42 /** Implementation of a UNO input stream wrapping a binary input stream.
  43  */
  44 class UnoBinaryInputStream : public UnoBinaryInputStream_BASE
  45 {
  46 public:
  47     explicit            UnoBinaryInputStream( BinaryInputStream& rInStrm );
  48
  49     virtual sal_Int32 SAL_CALL readBytes( Sequence< sal_Int8 >& rData, sal_Int32 nBytesToRead )
  50                         throw (NotConnectedException, BufferSizeExceededException, IOException, RuntimeException);
  51     virtual sal_Int32 SAL_CALL readSomeBytes( Sequence< sal_Int8 >& rData, sal_Int32 nMaxBytesToRead )
  52                         throw (NotConnectedException, BufferSizeExceededException, IOException, RuntimeException);
  53     virtual void SAL_CALL skipBytes( sal_Int32 nBytesToSkip )
  54                         throw (NotConnectedException, BufferSizeExceededException, IOException, RuntimeException);
  55     virtual sal_Int32 SAL_CALL available()
  56                         throw (NotConnectedException, IOException, RuntimeException);
  57     virtual void SAL_CALL closeInput()
  58                         throw (NotConnectedException, IOException, RuntimeException);
  59
  60 private:
  61     void                ensureConnected() const throw (NotConnectedException);
  62
  63 private:
  64     BinaryInputStream*  mpInStrm;
  65 };
  66
  67 // ----------------------------------------------------------------------------
  68
  69 UnoBinaryInputStream::UnoBinaryInputStream( BinaryInputStream& rInStrm ) :
  70     mpInStrm( &rInStrm )
  71 {
  72 }
  73
  74 sal_Int32 SAL_CALL UnoBinaryInputStream::readBytes( Sequence< sal_Int8 >& rData, sal_Int32 nBytesToRead )
  75         throw (NotConnectedException, BufferSizeExceededException, IOException, RuntimeException)
  76 {
  77     ensureConnected();
  78     return mpInStrm->readData( rData, nBytesToRead, 1 );
  79 }
  80
  81 sal_Int32 SAL_CALL UnoBinaryInputStream::readSomeBytes( Sequence< sal_Int8 >& rData, sal_Int32 nMaxBytesToRead )
  82         throw (NotConnectedException, BufferSizeExceededException, IOException, RuntimeException)
  83 {
  84     ensureConnected();
  85     return mpInStrm->readData( rData, nMaxBytesToRead, 1 );
  86 }
  87
  88 void SAL_CALL UnoBinaryInputStream::skipBytes( sal_Int32 nBytesToSkip )
  89         throw (NotConnectedException, BufferSizeExceededException, IOException, RuntimeException)
  90 {
  91     ensureConnected();
  92     mpInStrm->skip( nBytesToSkip, 1 );
  93 }
  94
  95 sal_Int32 SAL_CALL UnoBinaryInputStream::available() throw (NotConnectedException, IOException, RuntimeException)
  96 {
  97     ensureConnected();
  98     throw RuntimeException( "Functionality not supported", Reference< XInputStream >() );
  99 }
 100
 101 void SAL_CALL UnoBinaryInputStream::closeInput() throw (NotConnectedException, IOException, RuntimeException)
 102 {
 103     ensureConnected();
 104     mpInStrm->close();
 105     mpInStrm = 0;
 106 }
 107
 108 void UnoBinaryInputStream::ensureConnected() const throw (NotConnectedException)
 109 {
 110     if( !mpInStrm )
 111         throw NotConnectedException( "Stream closed", Reference< XInterface >() );
 112 }
 113
 114 } // namespace
 115
 116 // ============================================================================
 117
 118 TextInputStream::TextInputStream( const Reference< XComponentContext >& rxContext, const Reference< XInputStream >& rxInStrm, rtl_TextEncoding eTextEnc )
 119 {
 120     init( rxContext, rxInStrm, eTextEnc );
 121 }
 122
 123 TextInputStream::TextInputStream( const Reference< XComponentContext >& rxContext, BinaryInputStream& rInStrm, rtl_TextEncoding eTextEnc )
 124 {
 125     init( rxContext, new UnoBinaryInputStream( rInStrm ), eTextEnc );
 126 }
 127
 128 TextInputStream::~TextInputStream()
 129 {
 130 }
 131
 132 bool TextInputStream::isEof() const
 133 {
 134     if( mxTextStrm.is() ) try
 135     {
 136         return mxTextStrm->isEOF();
 137     }
 138     catch (const Exception&)
 139     {
 140     }
 141     return true;
 142 }
 143
 144 OUString TextInputStream::readLine()
 145 {
 146     if( mxTextStrm.is() ) try
 147     {
 148         /*  The function createFinalString() adds a character that may have
 149             been buffered in the previous call of readToChar() (see below). */
 150         return createFinalString( mxTextStrm->readLine() );
 151     }
 152     catch (const Exception&)
 153     {
 154         mxTextStrm.clear();
 155     }
 156     return OUString();
 157 }
 158
 159 OUString TextInputStream::readToChar( sal_Unicode cChar, bool bIncludeChar )
 160 {
 161     if( mxTextStrm.is() ) try
 162     {
 163         Sequence< sal_Unicode > aDelimiters( 1 );
 164         aDelimiters[ 0 ] = cChar;
 165         /*  Always get the delimiter character from the UNO text input stream.
 166             In difference to this implementation, it will not return it in the
 167             next call but silently skip it. If caller specifies to exclude the
 168             character in this call, it will be returned in the next call of one
 169             of the own member functions. The function createFinalString() adds
 170             a character that has been buffered in the previous call. */
 171         OUString aString = createFinalString( mxTextStrm->readString( aDelimiters, sal_False ) );
 172         // remove last character from string and remember it for next call
 173         if( !bIncludeChar && !aString.isEmpty() && (aString[ aString.getLength() - 1 ] == cChar) )
 174         {
 175             mcPendingChar = cChar;
 176             aString = aString.copy( 0, aString.getLength() - 1 );
 177         }
 178         return aString;
 179     }
 180     catch (const Exception&)
 181     {
 182         mxTextStrm.clear();
 183     }
 184     return OUString();
 185 }
 186
 187 Reference< XTextInputStream2 > TextInputStream::createXTextInputStream(
 188         const Reference< XComponentContext >& rxContext, const Reference< XInputStream >& rxInStrm, rtl_TextEncoding eTextEnc )
 189 {
 190     Reference< XTextInputStream2 > xTextStrm;
 191     const char* pcCharset = rtl_getBestMimeCharsetFromTextEncoding( eTextEnc );
 192     OSL_ENSURE( pcCharset, "TextInputStream::createXTextInputStream - unsupported text encoding" );
 193     if( rxContext.is() && rxInStrm.is() && pcCharset ) try
 194     {
 195         xTextStrm = com::sun::star::io::TextInputStream::create( rxContext );
 196         xTextStrm->setInputStream( rxInStrm );
 197         xTextStrm->setEncoding( OUString::createFromAscii( pcCharset ) );
 198     }
 199     catch (const Exception&)
 200     {
 201     }
 202     return xTextStrm;
 203 }
 204
 205 // private --------------------------------------------------------------------
 206
 207 OUString TextInputStream::createFinalString( const OUString& rString )
 208 {
 209     if( mcPendingChar == 0 )
 210         return rString;
 211
 212     OUString aString = OUString( mcPendingChar ) + rString;
 213     mcPendingChar = 0;
 214     return aString;
 215 }
 216
 217 void TextInputStream::init( const Reference< XComponentContext >& rxContext, const Reference< XInputStream >& rxInStrm, rtl_TextEncoding eTextEnc )
 218 {
 219     mcPendingChar = 0;
 220     mxTextStrm = createXTextInputStream( rxContext, rxInStrm, eTextEnc );
 221 }
 222
 223 // ============================================================================
 224
 225 } // namespace oox
 226
 227 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */