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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <tools/debug.hxx>
#include <tools/stream.hxx>
#include <tools/solar.h>
#include <rtl/string.hxx>
#include <svtools/rtfkeywd.hxx>
#include <svtools/rtfout.hxx>
namespace {
SvStream& Out_Hex( SvStream& rStream, sal_uLong nHex, sal_uInt8 nLen )
{
char aNToABuf[] = "0000000000000000";
DBG_ASSERT( nLen < sizeof(aNToABuf), "too many places" );
if( nLen >= sizeof(aNToABuf) )
nLen = (sizeof(aNToABuf)-1);
// set pointer to end of buffer
char* pStr = aNToABuf + (sizeof(aNToABuf)-1);
for( sal_uInt8 n = 0; n < nLen; ++n )
{
*(--pStr) = static_cast<char>(nHex & 0xf ) + 48;
if( *pStr > '9' )
*pStr += 39;
nHex >>= 4;
}
return rStream.WriteOString( pStr );
}
// Ideally, this function should work on (sal_uInt32) Unicode scalar values
// instead of (sal_Unicode) UTF-16 code units. However, at least "Rich Text
// Format (RTF) Specification Version 1.9.1" available at
// <https://www.microsoft.com/en-us/download/details.aspx?id=10725> does not
// look like it allows non-BMP Unicode characters >= 0x10000 in the \uN notation
// (it only talks about "Unicode character", but then explains how values of N
// greater than 32767 will be expressed as negative signed 16-bit numbers, so
// that smells like \uN is limited to BMP).
// However the "Mathematics" section has an example that shows the code point
// U+1D44E being encoded as UTF-16 surrogate pair "\u-10187?\u-9138?", so
// sal_Unicode actually works fine here.
SvStream& Out_Char(SvStream& rStream, sal_Unicode c,
int *pUCMode, rtl_TextEncoding eDestEnc)
{
const char* pStr = nullptr;
switch (c)
{
case 0x1:
case 0x2:
// this are control character of our textattributes and will never be
// written
break;
case 0xA0:
rStream.WriteOString( "\\~" );
break;
case 0xAD:
rStream.WriteOString( "\\-" );
break;
case 0x2011:
rStream.WriteOString( "\\_" );
break;
case '\n':
pStr = OOO_STRING_SVTOOLS_RTF_LINE;
break;
case '\t':
pStr = OOO_STRING_SVTOOLS_RTF_TAB;
break;
default:
switch(c)
{
case 149:
pStr = OOO_STRING_SVTOOLS_RTF_BULLET;
break;
case 150:
pStr = OOO_STRING_SVTOOLS_RTF_ENDASH;
break;
case 151:
pStr = OOO_STRING_SVTOOLS_RTF_EMDASH;
break;
case 145:
pStr = OOO_STRING_SVTOOLS_RTF_LQUOTE;
break;
case 146:
pStr = OOO_STRING_SVTOOLS_RTF_RQUOTE;
break;
case 147:
pStr = OOO_STRING_SVTOOLS_RTF_LDBLQUOTE;
break;
case 148:
pStr = OOO_STRING_SVTOOLS_RTF_RDBLQUOTE;
break;
}
if (pStr)
break;
switch (c)
{
case '\\':
case '}':
case '{':
rStream.WriteChar( '\\' ).WriteChar( char(c) );
break;
default:
if (c >= ' ' && c <= '~')
rStream.WriteChar( char(c) );
else
{
//If we can't convert to the dest encoding, or if
//it's an uncommon multibyte sequence which most
//readers won't be able to handle correctly, then
//export as unicode
OUString sBuf(&c, 1);
OString sConverted;
sal_uInt32 const nFlags =
RTL_UNICODETOTEXT_FLAGS_UNDEFINED_ERROR |
RTL_UNICODETOTEXT_FLAGS_INVALID_ERROR;
bool bWriteAsUnicode = !(sBuf.convertToString(&sConverted,
eDestEnc, nFlags))
|| (RTL_TEXTENCODING_UTF8==eDestEnc); // #i43933# do not export UTF-8 chars in RTF;
if (bWriteAsUnicode)
{
(void)sBuf.convertToString(&sConverted,
eDestEnc, OUSTRING_TO_OSTRING_CVTFLAGS);
}
const sal_Int32 nLen = sConverted.getLength();
if (bWriteAsUnicode && pUCMode)
{
// then write as unicode - character
if (*pUCMode != nLen)
{
// #i47831# add an additional whitespace, so that
// "document whitespaces" are not ignored.;
rStream.WriteOString( "\\uc" )
.WriteNumberAsString( nLen ).WriteOString( " " );
*pUCMode = nLen;
}
rStream.WriteOString( "\\u" )
.WriteNumberAsString(c);
}
for (sal_Int32 nI = 0; nI < nLen; ++nI)
{
rStream.WriteOString( "\\'" );
Out_Hex(rStream, sConverted[nI], 2);
}
}
break;
}
break;
}
if (pStr)
rStream.WriteOString( pStr ).WriteChar( ' ' );
return rStream;
}
}
SvStream& RTFOutFuncs::Out_String( SvStream& rStream, std::u16string_view rStr,
rtl_TextEncoding eDestEnc)
{
int nUCMode = 1;
for (size_t n = 0; n < rStr.size(); ++n)
Out_Char(rStream, rStr[n], &nUCMode, eDestEnc);
if (nUCMode != 1)
rStream.WriteOString( "\\uc1" ).WriteOString( " " ); // #i47831# add an additional whitespace, so that "document whitespaces" are not ignored.;
return rStream;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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