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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/.
*/
#include <filter/msfilter/rtfutil.hxx>
#include <rtl/strbuf.hxx>
#include <osl/diagnose.h>
#include <svtools/rtfkeywd.hxx>
#include <rtl/character.hxx>
#include <tools/stream.hxx>
namespace msfilter
{
namespace rtfutil
{
OString OutHex(sal_uLong nHex, sal_uInt8 nLen)
{
sal_Char aNToABuf[] = "0000000000000000";
OSL_ENSURE(nLen < sizeof(aNToABuf), "nLen is too big");
if (nLen >= sizeof(aNToABuf))
nLen = (sizeof(aNToABuf) - 1);
// Set pointer to the buffer end
sal_Char* pStr = aNToABuf + (sizeof(aNToABuf) - 1);
for (sal_uInt8 n = 0; n < nLen; ++n)
{
*(--pStr) = static_cast<sal_Char>(nHex & 0xf) + 48;
if (*pStr > '9')
*pStr += 39;
nHex >>= 4;
}
return OString(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.
OString OutChar(sal_Unicode c, int* pUCMode, rtl_TextEncoding eDestEnc, bool* pSuccess,
bool bUnicode)
{
if (pSuccess)
*pSuccess = true;
OStringBuffer aBuf;
const sal_Char* pStr = nullptr;
// 0x0b instead of \n, etc because of the replacements in SwWW8AttrIter::GetSnippet()
switch (c)
{
case 0x0b:
// hard line break
pStr = OOO_STRING_SVTOOLS_RTF_LINE;
break;
case '\t':
pStr = OOO_STRING_SVTOOLS_RTF_TAB;
break;
case '\\':
case '}':
case '{':
aBuf.append('\\');
aBuf.append(static_cast<sal_Char>(c));
break;
case 0xa0:
// non-breaking space
pStr = "\\~";
break;
case 0x1e:
// non-breaking hyphen
pStr = "\\_";
break;
case 0x1f:
// optional hyphen
pStr = "\\-";
break;
default:
if (c >= ' ' && c <= '~')
aBuf.append(static_cast<sal_Char>(c));
else
{
OUString sBuf(&c, 1);
OString sConverted;
if (pSuccess)
*pSuccess &= sBuf.convertToString(&sConverted, eDestEnc,
RTL_UNICODETOTEXT_FLAGS_UNDEFINED_ERROR
| RTL_UNICODETOTEXT_FLAGS_INVALID_ERROR);
else
sBuf.convertToString(&sConverted, eDestEnc, OUSTRING_TO_OSTRING_CVTFLAGS);
const sal_Int32 nLen = sConverted.getLength();
if (pUCMode && bUnicode)
{
if (*pUCMode != nLen)
{
aBuf.append("\\uc");
aBuf.append(static_cast<sal_Int32>(nLen));
// #i47831# add an additional whitespace, so that "document whitespaces" are not ignored.
aBuf.append(' ');
*pUCMode = nLen;
}
aBuf.append("\\u");
aBuf.append(static_cast<sal_Int32>(c));
}
for (sal_Int32 nI = 0; nI < nLen; ++nI)
{
aBuf.append("\\'");
aBuf.append(OutHex(sConverted[nI], 2));
}
}
}
if (pStr)
{
aBuf.append(pStr);
switch (c)
{
case 0xa0:
case 0x1e:
case 0x1f:
break;
default:
aBuf.append(' ');
}
}
return aBuf.makeStringAndClear();
}
OString OutString(const OUString& rStr, rtl_TextEncoding eDestEnc, bool bUnicode)
{
SAL_INFO("filter.ms", OSL_THIS_FUNC << ", rStr = '" << rStr << "'");
OStringBuffer aBuf;
int nUCMode = 1;
for (sal_Int32 n = 0; n < rStr.getLength(); ++n)
aBuf.append(OutChar(rStr[n], &nUCMode, eDestEnc, nullptr, bUnicode));
if (nUCMode != 1)
{
aBuf.append(OOO_STRING_SVTOOLS_RTF_UC);
aBuf.append(sal_Int32(1));
aBuf.append(
" "); // #i47831# add an additional whitespace, so that "document whitespaces" are not ignored.;
}
return aBuf.makeStringAndClear();
}
/// Checks if lossless conversion of the string to eDestEnc is possible or not.
static bool TryOutString(const OUString& rStr, rtl_TextEncoding eDestEnc)
{
int nUCMode = 1;
for (sal_Int32 n = 0; n < rStr.getLength(); ++n)
{
bool bRet;
OutChar(rStr[n], &nUCMode, eDestEnc, &bRet);
if (!bRet)
return false;
}
return true;
}
OString OutStringUpr(const sal_Char* pToken, const OUString& rStr, rtl_TextEncoding eDestEnc)
{
if (TryOutString(rStr, eDestEnc))
return OString("{") + pToken + " " + OutString(rStr, eDestEnc) + "}";
OStringBuffer aRet;
aRet.append("{" OOO_STRING_SVTOOLS_RTF_UPR "{");
aRet.append(pToken);
aRet.append(" ");
aRet.append(OutString(rStr, eDestEnc, /*bUnicode =*/false));
aRet.append("}{" OOO_STRING_SVTOOLS_RTF_IGNORE OOO_STRING_SVTOOLS_RTF_UD "{");
aRet.append(pToken);
aRet.append(" ");
aRet.append(OutString(rStr, eDestEnc));
aRet.append("}}}");
return aRet.makeStringAndClear();
}
int AsHex(char ch)
{
int ret = 0;
if (rtl::isAsciiDigit(static_cast<unsigned char>(ch)))
ret = ch - '0';
else
{
if (ch >= 'a' && ch <= 'f')
ret = ch - 'a';
else if (ch >= 'A' && ch <= 'F')
ret = ch - 'A';
else
return -1;
ret += 10;
}
return ret;
}
OString WriteHex(const sal_uInt8* pData, sal_uInt32 nSize, SvStream* pStream, sal_uInt32 nLimit)
{
OStringBuffer aRet;
sal_uInt32 nBreak = 0;
for (sal_uInt32 i = 0; i < nSize; i++)
{
OString sNo = OString::number(pData[i], 16);
if (sNo.getLength() < 2)
{
if (pStream)
pStream->WriteChar('0');
else
aRet.append('0');
}
if (pStream)
pStream->WriteCharPtr(sNo.getStr());
else
aRet.append(sNo);
if (++nBreak == nLimit)
{
if (pStream)
pStream->WriteCharPtr(SAL_NEWLINE_STRING);
else
aRet.append(SAL_NEWLINE_STRING);
nBreak = 0;
}
}
return aRet.makeStringAndClear();
}
bool ExtractOLE2FromObjdata(const OString& rObjdata, SvStream& rOle2)
{
SvMemoryStream aStream;
int b = 0, count = 2;
// Feed the destination text to a stream.
for (int i = 0; i < rObjdata.getLength(); ++i)
{
char ch = rObjdata[i];
if (ch != 0x0d && ch != 0x0a)
{
b = b << 4;
sal_Int8 parsed = msfilter::rtfutil::AsHex(ch);
if (parsed == -1)
return false;
b += parsed;
count--;
if (!count)
{
aStream.WriteChar(b);
count = 2;
b = 0;
}
}
}
// Skip ObjectHeader, see [MS-OLEDS] 2.2.4.
if (aStream.Tell())
{
aStream.Seek(0);
sal_uInt32 nData;
aStream.ReadUInt32(nData); // OLEVersion
aStream.ReadUInt32(nData); // FormatID
aStream.ReadUInt32(nData); // ClassName
aStream.SeekRel(nData);
aStream.ReadUInt32(nData); // TopicName
aStream.SeekRel(nData);
aStream.ReadUInt32(nData); // ItemName
aStream.SeekRel(nData);
aStream.ReadUInt32(nData); // NativeDataSize
if (nData)
{
rOle2.WriteStream(aStream);
rOle2.Seek(0);
}
}
return true;
}
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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