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Diffstat (limited to '')
| -rw-r--r-- | sax/source/expatwrap/saxwriter.cxx | 1486 |
1 files changed, 1486 insertions, 0 deletions
diff --git a/sax/source/expatwrap/saxwriter.cxx b/sax/source/expatwrap/saxwriter.cxx new file mode 100644 index 000000000..e19a31211 --- /dev/null +++ b/sax/source/expatwrap/saxwriter.cxx @@ -0,0 +1,1486 @@ +/* -*- 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 <string.h> + +#include <cassert> +#include <set> +#include <stack> +#include <vector> + +#include <com/sun/star/io/IOException.hpp> +#include <com/sun/star/lang/WrappedTargetRuntimeException.hpp> +#include <com/sun/star/lang/XServiceInfo.hpp> +#include <com/sun/star/uno/XComponentContext.hpp> +#include <com/sun/star/util/XCloneable.hpp> +#include <com/sun/star/xml/sax/SAXInvalidCharacterException.hpp> +#include <com/sun/star/xml/sax/XWriter.hpp> + +#include <cppuhelper/exc_hlp.hxx> +#include <cppuhelper/weak.hxx> +#include <cppuhelper/implbase.hxx> +#include <cppuhelper/supportsservice.hxx> + +#include <osl/diagnose.h> +#include <rtl/character.hxx> +#include <sal/log.hxx> + +using namespace ::std; +using namespace ::osl; +using namespace ::cppu; +using namespace ::com::sun::star::uno; +using namespace ::com::sun::star::lang; +using namespace ::com::sun::star::xml::sax; +using namespace ::com::sun::star::util; +using namespace ::com::sun::star::io; + +#include <memory> + +#define LINEFEED 10 +#define SEQUENCESIZE 1024 +#define MAXCOLUMNCOUNT 72 + +/****** +* +* +* Character conversion functions +* +* +*****/ + +namespace +{ +enum SaxInvalidCharacterError +{ + SAX_NONE, + SAX_WARNING, + SAX_ERROR +}; + +// Stuff for custom entity names +struct ReplacementPair +{ + OUString name; + OUString replacement; +}; +inline bool operator<(const ReplacementPair& lhs, const ReplacementPair& rhs) +{ + return lhs.replacement.compareTo(rhs.replacement) < 0; +} + +class SaxWriterHelper +{ +#ifdef DBG_UTIL +public: + ::std::stack<OUString> m_DebugStartedElements; +#endif + +private: + Reference<XOutputStream> m_out; + Sequence<sal_Int8> m_Sequence; + sal_Int8* mp_Sequence; + + sal_Int32 nLastLineFeedPos; // is negative after writing a sequence + sal_uInt32 nCurrentPos; + bool m_bStartElementFinished; + + std::vector<ReplacementPair> m_Replacements; + + /// @throws SAXException + sal_uInt32 writeSequence(); + + // use only if to insert the bytes more space in the sequence is needed and + // so the sequence has to write out and reset rPos to 0 + // writes sequence only on overflow, sequence could be full on the end (rPos == SEQUENCESIZE) + /// @throws SAXException + void AddBytes(sal_Int8* pTarget, sal_uInt32& rPos, const sal_Int8* pBytes, + sal_uInt32 nBytesCount); + /// @throws SAXException + bool convertToXML(const sal_Unicode* pStr, sal_Int32 nStrLen, bool bDoNormalization, + bool bNormalizeWhitespace, sal_Int8* pTarget, sal_uInt32& rPos); + /// @throws SAXException + void FinishStartElement(); + + // Search for the correct replacement + const ReplacementPair* findXMLReplacement(const sal_Unicode* pStr, sal_Int32 nStrLen); + +public: + explicit SaxWriterHelper(Reference<XOutputStream> const& m_TempOut) + : m_out(m_TempOut) + , m_Sequence(SEQUENCESIZE) + , mp_Sequence(nullptr) + , nLastLineFeedPos(0) + , nCurrentPos(0) + , m_bStartElementFinished(true) + { + OSL_ENSURE(SEQUENCESIZE > 50, "Sequence cache size too small"); + mp_Sequence = m_Sequence.getArray(); + } + ~SaxWriterHelper() + { + OSL_ENSURE(!nCurrentPos, "cached Sequence not written"); + OSL_ENSURE(m_bStartElementFinished, "StartElement not completely written"); + } + + /// @throws SAXException + void insertIndentation(sal_uInt32 m_nLevel); + + // returns whether it works correct or invalid characters were in the string + // If there are invalid characters in the string it returns sal_False. + // Than the calling method has to throw the needed Exception. + /// @throws SAXException + bool writeString(const OUString& rWriteOutString, bool bDoNormalization, + bool bNormalizeWhitespace); + + sal_uInt32 GetLastColumnCount() const noexcept + { + return static_cast<sal_uInt32>(nCurrentPos - nLastLineFeedPos); + } + + /// @throws SAXException + void startDocument(); + + // returns whether it works correct or invalid characters were in the strings + // If there are invalid characters in one of the strings it returns sal_False. + // Than the calling method has to throw the needed Exception. + /// @throws SAXException + SaxInvalidCharacterError startElement(const OUString& rName, + const Reference<XAttributeList>& xAttribs); + /// @throws SAXException + bool FinishEmptyElement(); + + // returns whether it works correct or invalid characters were in the string + // If there are invalid characters in the string it returns sal_False. + // Than the calling method has to throw the needed Exception. + /// @throws SAXException + bool endElement(const OUString& rName); + /// @throws SAXException + void endDocument(); + + // returns whether it works correct or invalid characters were in the strings + // If there are invalid characters in the string it returns sal_False. + // Than the calling method has to throw the needed Exception. + /// @throws SAXException + bool processingInstruction(const OUString& rTarget, const OUString& rData); + /// @throws SAXException + void startCDATA(); + /// @throws SAXException + void endCDATA(); + + // returns whether it works correct or invalid characters were in the strings + // If there are invalid characters in the string it returns sal_False. + // Than the calling method has to throw the needed Exception. + /// @throws SAXException + bool comment(const OUString& rComment); + + /// @throws SAXException + void clearBuffer(); + + // Use custom entity names + void setCustomEntityNames( + const ::css::uno::Sequence<::css::beans::Pair<::rtl::OUString, ::rtl::OUString>>& + replacements); + + // Calculate length for convertToXML + sal_Int32 calcXMLByteLength(const OUString& rStr, bool bDoNormalization, + bool bNormalizeWhitespace); +}; + +const bool g_bValidCharsBelow32[32] = { + // clang-format off +// 0 1 2 3 4 5 6 7 + false, false, false, false, false, false, false, false, //0 + false, true, true, false, false, true, false, false, //8 + false, false, false, false, false, false, false, false, //16 + false, false, false, false, false, false, false, false + // clang-format on +}; + +bool IsInvalidChar(const sal_Unicode aChar) +{ + bool bRet(false); + // check first for the most common characters + if (aChar < 32 || aChar >= 0xd800) + bRet = ((aChar < 32 && !g_bValidCharsBelow32[aChar]) || aChar == 0xffff || aChar == 0xfffe); + return bRet; +} + +/******** +* write through to the output stream +* +*****/ +sal_uInt32 SaxWriterHelper::writeSequence() +{ + try + { + m_out->writeBytes(m_Sequence); + } + catch (const IOException&) + { + css::uno::Any anyEx = cppu::getCaughtException(); + throw SAXException("IO exception during writing", Reference<XInterface>(), anyEx); + } + nLastLineFeedPos -= SEQUENCESIZE; + return 0; +} + +void SaxWriterHelper::AddBytes(sal_Int8* pTarget, sal_uInt32& rPos, const sal_Int8* pBytes, + sal_uInt32 nBytesCount) +{ + OSL_ENSURE((rPos + nBytesCount) > SEQUENCESIZE, "wrong use of AddBytesMethod"); + sal_uInt32 nCount(SEQUENCESIZE - rPos); + memcpy(&(pTarget[rPos]), pBytes, nCount); + + OSL_ENSURE(rPos + nCount == SEQUENCESIZE, "the position should be the at the end"); + + rPos = writeSequence(); + sal_uInt32 nRestCount(nBytesCount - nCount); + if ((rPos + nRestCount) <= SEQUENCESIZE) + { + memcpy(&(pTarget[rPos]), &pBytes[nCount], nRestCount); + rPos += nRestCount; + } + else + AddBytes(pTarget, rPos, &pBytes[nCount], nRestCount); +} + +void SaxWriterHelper::setCustomEntityNames( + const ::css::uno::Sequence<::css::beans::Pair<::rtl::OUString, ::rtl::OUString>>& replacements) +{ + m_Replacements.resize(replacements.size()); + for (size_t i = 0; i < replacements.size(); ++i) + { + m_Replacements[i].name = replacements[i].First; + m_Replacements[i].replacement = replacements[i].Second; + } + if (replacements.size() > 1) + std::sort(m_Replacements.begin(), m_Replacements.end()); +} + +/** Converts a UTF-16 string to UTF-8 and does XML normalization + + @param pTarget + Pointer to a piece of memory, to where the output should be written. The caller + must call calcXMLByteLength on the same string, to ensure, + that there is enough memory for converting. + */ +bool SaxWriterHelper::convertToXML(const sal_Unicode* pStr, sal_Int32 nStrLen, + bool bDoNormalization, bool bNormalizeWhitespace, + sal_Int8* pTarget, sal_uInt32& rPos) +{ + bool bRet(true); + sal_uInt32 nSurrogate = 0; + + for (sal_Int32 i = 0; i < nStrLen; i++) + { + sal_Unicode c = pStr[i]; + if (IsInvalidChar(c)) + bRet = false; + else if ((c >= 0x0001) && (c <= 0x007F)) // Deal with ascii + { + if (bDoNormalization) + { + switch (c) + { + case '&': // resemble to & + { + if ((rPos + 5) > SEQUENCESIZE) + AddBytes(pTarget, rPos, reinterpret_cast<sal_Int8 const*>("&"), 5); + else + { + memcpy(&(pTarget[rPos]), "&", 5); + rPos += 5; + } + } + break; + case '<': + { + if ((rPos + 4) > SEQUENCESIZE) + AddBytes(pTarget, rPos, reinterpret_cast<sal_Int8 const*>("<"), 4); + else + { + memcpy(&(pTarget[rPos]), "<", 4); + rPos += 4; // < + } + } + break; + case '>': + { + if ((rPos + 4) > SEQUENCESIZE) + AddBytes(pTarget, rPos, reinterpret_cast<sal_Int8 const*>(">"), 4); + else + { + memcpy(&(pTarget[rPos]), ">", 4); + rPos += 4; // > + } + } + break; + case '\'': + { + if ((rPos + 6) > SEQUENCESIZE) + AddBytes(pTarget, rPos, reinterpret_cast<sal_Int8 const*>("'"), 6); + else + { + memcpy(&(pTarget[rPos]), "'", 6); + rPos += 6; // ' + } + } + break; + case '"': + { + if ((rPos + 6) > SEQUENCESIZE) + AddBytes(pTarget, rPos, reinterpret_cast<sal_Int8 const*>("""), 6); + else + { + memcpy(&(pTarget[rPos]), """, 6); + rPos += 6; // " + } + } + break; + case 13: + { + if ((rPos + 6) > SEQUENCESIZE) + AddBytes(pTarget, rPos, reinterpret_cast<sal_Int8 const*>("
"), 6); + else + { + memcpy(&(pTarget[rPos]), "
", 6); + rPos += 6; + } + } + break; + case LINEFEED: + { + if (bNormalizeWhitespace) + { + if ((rPos + 6) > SEQUENCESIZE) + AddBytes(pTarget, rPos, reinterpret_cast<sal_Int8 const*>("
"), + 6); + else + { + memcpy(&(pTarget[rPos]), "
", 6); + rPos += 6; + } + } + else + { + pTarget[rPos] = LINEFEED; + nLastLineFeedPos = rPos; + rPos++; + } + } + break; + case 9: + { + if (bNormalizeWhitespace) + { + if ((rPos + 6) > SEQUENCESIZE) + AddBytes(pTarget, rPos, reinterpret_cast<sal_Int8 const*>("	"), + 6); + else + { + memcpy(&(pTarget[rPos]), "	", 6); + rPos += 6; + } + } + else + { + pTarget[rPos] = 9; + rPos++; + } + } + break; + default: + { + pTarget[rPos] = static_cast<sal_Int8>(c); + rPos++; + } + break; + } + } + else + { + pTarget[rPos] = static_cast<sal_Int8>(c); + if (static_cast<sal_Int8>(c) == LINEFEED) + nLastLineFeedPos = rPos; + rPos++; + } + } + else + { + // Deal with replacements + if (bDoNormalization && !m_Replacements.empty()) + { + // search + const ReplacementPair* it = findXMLReplacement(&pStr[i], nStrLen - i); + + // replace + if (it != nullptr) + { + OString name = ::rtl::OUStringToOString(it->name, RTL_TEXTENCODING_UTF8); + if (rPos + name.getLength() > SEQUENCESIZE) + AddBytes(pTarget, rPos, reinterpret_cast<sal_Int8 const*>(name.getStr()), + name.getLength()); + else + { + memcpy(&(pTarget[rPos]), name.getStr(), name.getLength()); + rPos += name.getLength(); + } + i += it->replacement.getLength() - 1; + continue; + } + } + + // Deal with other unicode cases + if (rtl::isHighSurrogate(c)) + { + // 1. surrogate: save (until 2. surrogate) + if (nSurrogate != 0) // left-over lone 1st Unicode surrogate + { + OSL_FAIL("left-over Unicode surrogate"); + bRet = false; + } + nSurrogate = c; + } + else if (rtl::isLowSurrogate(c)) + { + // 2. surrogate: write as UTF-8 + if (nSurrogate) // can only be 1st surrogate + { + nSurrogate = rtl::combineSurrogates(nSurrogate, c); + sal_Int8 aBytes[] = { sal_Int8(0xF0 | ((nSurrogate >> 18) & 0x0F)), + sal_Int8(0x80 | ((nSurrogate >> 12) & 0x3F)), + sal_Int8(0x80 | ((nSurrogate >> 6) & 0x3F)), + sal_Int8(0x80 | ((nSurrogate >> 0) & 0x3F)) }; + if ((rPos + 4) > SEQUENCESIZE) + AddBytes(pTarget, rPos, aBytes, 4); + else + { + pTarget[rPos] = aBytes[0]; + rPos++; + pTarget[rPos] = aBytes[1]; + rPos++; + pTarget[rPos] = aBytes[2]; + rPos++; + pTarget[rPos] = aBytes[3]; + rPos++; + } + } + else // lone 2nd surrogate + { + OSL_FAIL("illegal Unicode character"); + bRet = false; + } + + // reset surrogate + nSurrogate = 0; + } + else if (c > 0x07FF) + { + sal_Int8 aBytes[] + = { sal_Int8(0xE0 | ((c >> 12) & 0x0F)), sal_Int8(0x80 | ((c >> 6) & 0x3F)), + sal_Int8(0x80 | ((c >> 0) & 0x3F)) }; + if ((rPos + 3) > SEQUENCESIZE) + AddBytes(pTarget, rPos, aBytes, 3); + else + { + pTarget[rPos] = aBytes[0]; + rPos++; + pTarget[rPos] = aBytes[1]; + rPos++; + pTarget[rPos] = aBytes[2]; + rPos++; + } + } + else + { + sal_Int8 aBytes[] + = { sal_Int8(0xC0 | ((c >> 6) & 0x1F)), sal_Int8(0x80 | ((c >> 0) & 0x3F)) }; + if ((rPos + 2) > SEQUENCESIZE) + AddBytes(pTarget, rPos, aBytes, 2); + else + { + pTarget[rPos] = aBytes[0]; + rPos++; + pTarget[rPos] = aBytes[1]; + rPos++; + } + } + } + + OSL_ENSURE(rPos <= SEQUENCESIZE, "not reset current position"); + if (rPos == SEQUENCESIZE) + rPos = writeSequence(); + + // reset left-over surrogate + if ((nSurrogate != 0) && !rtl::isHighSurrogate(c)) + { + OSL_FAIL("left-over Unicode surrogate"); + nSurrogate = 0; + bRet = false; + } + } + if (nSurrogate != 0) // trailing lone 1st surrogate + { + OSL_FAIL("left-over Unicode surrogate"); + bRet = false; + } + return bRet; +} + +void SaxWriterHelper::FinishStartElement() +{ + if (!m_bStartElementFinished) + { + mp_Sequence[nCurrentPos] = '>'; + nCurrentPos++; + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); + m_bStartElementFinished = true; + } +} + +void SaxWriterHelper::insertIndentation(sal_uInt32 m_nLevel) +{ + FinishStartElement(); + if (m_nLevel > 0) + { + if ((nCurrentPos + m_nLevel + 1) <= SEQUENCESIZE) + { + mp_Sequence[nCurrentPos] = LINEFEED; + nLastLineFeedPos = nCurrentPos; + nCurrentPos++; + memset(&(mp_Sequence[nCurrentPos]), 32, m_nLevel); + nCurrentPos += m_nLevel; + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); + } + else + { + sal_uInt32 nCount(m_nLevel + 1); + std::unique_ptr<sal_Int8[]> pBytes(new sal_Int8[nCount]); + pBytes[0] = LINEFEED; + memset(&(pBytes[1]), 32, m_nLevel); + AddBytes(mp_Sequence, nCurrentPos, pBytes.get(), nCount); + pBytes.reset(); + nLastLineFeedPos = nCurrentPos - nCount; + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); + } + } + else + { + mp_Sequence[nCurrentPos] = LINEFEED; + nLastLineFeedPos = nCurrentPos; + nCurrentPos++; + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); + } +} + +bool SaxWriterHelper::writeString(const OUString& rWriteOutString, bool bDoNormalization, + bool bNormalizeWhitespace) +{ + FinishStartElement(); + return convertToXML(rWriteOutString.getStr(), rWriteOutString.getLength(), bDoNormalization, + bNormalizeWhitespace, mp_Sequence, nCurrentPos); +} + +void SaxWriterHelper::startDocument() +{ + const char pc[] = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"; + const int nLen = strlen(pc); + if ((nCurrentPos + nLen) <= SEQUENCESIZE) + { + memcpy(mp_Sequence, pc, nLen); + nCurrentPos += nLen; + } + else + { + AddBytes(mp_Sequence, nCurrentPos, reinterpret_cast<sal_Int8 const*>(pc), nLen); + } + OSL_ENSURE(nCurrentPos <= SEQUENCESIZE, "not reset current position"); + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); + mp_Sequence[nCurrentPos] = LINEFEED; + nCurrentPos++; + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); +} + +#ifndef NDEBUG +bool inrange(sal_Unicode c, sal_Unicode start, sal_Unicode end) { return c >= start && c <= end; } +#endif + +void CheckValidName(OUString const& rName) +{ +#ifdef NDEBUG + (void)rName; +#else + assert(!rName.isEmpty()); + bool hasColon(false); + for (sal_Int32 i = 0; i < rName.getLength(); ++i) + { + auto const c(rName[i]); + if (c == ':') + { + // see https://www.w3.org/TR/REC-xml-names/#ns-qualnames + SAL_WARN_IF(hasColon, "sax", "only one colon allowed: " << rName); + assert(!hasColon && "only one colon allowed"); + hasColon = true; + } + else if (!rtl::isAsciiAlphanumeric(c) && c != '_' && c != '-' && c != '.' + && !inrange(c, 0x00C0, 0x00D6) && !inrange(c, 0x00D8, 0x00F6) + && !inrange(c, 0x00F8, 0x02FF) && !inrange(c, 0x0370, 0x037D) + && !inrange(c, 0x037F, 0x1FFF) && !inrange(c, 0x200C, 0x200D) + && !inrange(c, 0x2070, 0x218F) && !inrange(c, 0x2C00, 0x2FEF) + && !inrange(c, 0x3001, 0xD7FF) && !inrange(c, 0xF900, 0xFDCF) + && !inrange(c, 0xFDF0, 0xFFFD) && c != 0x00B7 && !inrange(c, 0x0300, 0x036F) + && !inrange(c, 0x203F, 0x2040)) + { + // https://www.w3.org/TR/xml11/#NT-NameChar + // (currently we don't warn about invalid start chars) + SAL_WARN("sax", "unexpected character in attribute name: " << rName); + assert(!"unexpected character in attribute name"); + } + } +#endif +} + +SaxInvalidCharacterError SaxWriterHelper::startElement(const OUString& rName, + const Reference<XAttributeList>& xAttribs) +{ + FinishStartElement(); + +#ifdef DBG_UTIL + m_DebugStartedElements.push(rName); + ::std::set<OUString> DebugAttributes; +#endif + + mp_Sequence[nCurrentPos] = '<'; + nCurrentPos++; + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); + + SaxInvalidCharacterError eRet(SAX_NONE); + CheckValidName(rName); + if (!writeString(rName, false, false)) + eRet = SAX_ERROR; + + sal_Int16 nAttribCount = xAttribs.is() ? xAttribs->getLength() : 0; + for (sal_Int16 i = 0; i < nAttribCount; i++) + { + mp_Sequence[nCurrentPos] = ' '; + nCurrentPos++; + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); + + OUString const& rAttrName(xAttribs->getNameByIndex(i)); +#ifdef DBG_UTIL + // Well-formedness constraint: Unique Att Spec + assert(DebugAttributes.find(rAttrName) == DebugAttributes.end()); + DebugAttributes.insert(rAttrName); +#endif + CheckValidName(rAttrName); + if (!writeString(rAttrName, false, false)) + eRet = SAX_ERROR; + + mp_Sequence[nCurrentPos] = '='; + nCurrentPos++; + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); + mp_Sequence[nCurrentPos] = '"'; + nCurrentPos++; + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); + + if (!writeString(xAttribs->getValueByIndex(i), true, true) && eRet != SAX_ERROR) + eRet = SAX_WARNING; + + mp_Sequence[nCurrentPos] = '"'; + nCurrentPos++; + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); + } + + m_bStartElementFinished = false; // because the '>' character is not added, + // because it is possible, that the "/>" + // characters have to add + return eRet; +} + +bool SaxWriterHelper::FinishEmptyElement() +{ + if (m_bStartElementFinished) + return false; + + mp_Sequence[nCurrentPos] = '/'; + nCurrentPos++; + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); + mp_Sequence[nCurrentPos] = '>'; + nCurrentPos++; + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); + + m_bStartElementFinished = true; + + return true; +} + +bool SaxWriterHelper::endElement(const OUString& rName) +{ + FinishStartElement(); + + mp_Sequence[nCurrentPos] = '<'; + nCurrentPos++; + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); + mp_Sequence[nCurrentPos] = '/'; + nCurrentPos++; + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); + + CheckValidName(rName); + bool bRet(writeString(rName, false, false)); + + mp_Sequence[nCurrentPos] = '>'; + nCurrentPos++; + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); + + return bRet; +} + +void SaxWriterHelper::endDocument() +{ + if (nCurrentPos > 0) + { + m_Sequence.realloc(nCurrentPos); + nCurrentPos = writeSequence(); + //m_Sequence.realloc(SEQUENCESIZE); + } +} + +void SaxWriterHelper::clearBuffer() +{ + FinishStartElement(); + if (nCurrentPos > 0) + { + m_Sequence.realloc(nCurrentPos); + nCurrentPos = writeSequence(); + m_Sequence.realloc(SEQUENCESIZE); + // Be sure to update the array pointer after the reallocation. + mp_Sequence = m_Sequence.getArray(); + } +} + +bool SaxWriterHelper::processingInstruction(const OUString& rTarget, const OUString& rData) +{ + FinishStartElement(); + mp_Sequence[nCurrentPos] = '<'; + nCurrentPos++; + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); + mp_Sequence[nCurrentPos] = '?'; + nCurrentPos++; + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); + + bool bRet(writeString(rTarget, false, false)); + + mp_Sequence[nCurrentPos] = ' '; + nCurrentPos++; + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); + + if (!writeString(rData, false, false)) + bRet = false; + + mp_Sequence[nCurrentPos] = '?'; + nCurrentPos++; + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); + mp_Sequence[nCurrentPos] = '>'; + nCurrentPos++; + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); + + return bRet; +} + +void SaxWriterHelper::startCDATA() +{ + FinishStartElement(); + if ((nCurrentPos + 9) <= SEQUENCESIZE) + { + memcpy(&(mp_Sequence[nCurrentPos]), "<![CDATA[", 9); + nCurrentPos += 9; + } + else + AddBytes(mp_Sequence, nCurrentPos, reinterpret_cast<sal_Int8 const*>("<![CDATA["), 9); + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); +} + +void SaxWriterHelper::endCDATA() +{ + FinishStartElement(); + if ((nCurrentPos + 3) <= SEQUENCESIZE) + { + memcpy(&(mp_Sequence[nCurrentPos]), "]]>", 3); + nCurrentPos += 3; + } + else + AddBytes(mp_Sequence, nCurrentPos, reinterpret_cast<sal_Int8 const*>("]]>"), 3); + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); +} + +bool SaxWriterHelper::comment(const OUString& rComment) +{ + FinishStartElement(); + mp_Sequence[nCurrentPos] = '<'; + nCurrentPos++; + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); + mp_Sequence[nCurrentPos] = '!'; + nCurrentPos++; + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); + mp_Sequence[nCurrentPos] = '-'; + nCurrentPos++; + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); + mp_Sequence[nCurrentPos] = '-'; + nCurrentPos++; + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); + + bool bRet(writeString(rComment, false, false)); + + mp_Sequence[nCurrentPos] = '-'; + nCurrentPos++; + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); + mp_Sequence[nCurrentPos] = '-'; + nCurrentPos++; + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); + mp_Sequence[nCurrentPos] = '>'; + nCurrentPos++; + if (nCurrentPos == SEQUENCESIZE) + nCurrentPos = writeSequence(); + + return bRet; +} + +sal_Int32 SaxWriterHelper::calcXMLByteLength(const OUString& rStr, bool bDoNormalization, + bool bNormalizeWhitespace) +{ + sal_Int32 nOutputLength = 0; + sal_uInt32 nSurrogate = 0; + + const sal_Unicode* pStr = rStr.getStr(); + sal_Int32 nStrLen = rStr.getLength(); + for (sal_Int32 i = 0; i < nStrLen; i++) + { + sal_uInt16 c = pStr[i]; + if (!IsInvalidChar(c) && (c >= 0x0001) && (c <= 0x007F)) + { + if (bDoNormalization) + { + switch (c) + { + case '&': // resemble to & + nOutputLength += 5; + break; + case '<': // < + case '>': // > + nOutputLength += 4; + break; + case '\'': // ' + case '"': // " + case 13: // 
 + nOutputLength += 6; + break; + + case 10: // 
 + case 9: // 	 + if (bNormalizeWhitespace) + { + nOutputLength += 6; + } + else + { + nOutputLength++; + } + break; + default: + nOutputLength++; + } + } + else + { + nOutputLength++; + } + } + else + { + // Deal with replacements + if (bDoNormalization && !m_Replacements.empty()) + { + // search + const ReplacementPair* it = findXMLReplacement(&pStr[i], nStrLen - i); + + if (it != nullptr) + { + nOutputLength + += ::rtl::OUStringToOString(it->name, RTL_TEXTENCODING_UTF8).getLength(); + i += it->replacement.getLength() - 1; + continue; + } + } + + // Deal with other unicode cases + if (rtl::isHighSurrogate(c)) + { + // save surrogate + nSurrogate = c; + } + else if (rtl::isLowSurrogate(c)) + { + // 2. surrogate: write as UTF-8 (if range is OK + if (nSurrogate) + nOutputLength += 4; + nSurrogate = 0; + } + else if (c > 0x07FF) + { + nOutputLength += 3; + } + else + { + nOutputLength += 2; + } + } + + // surrogate processing + if ((nSurrogate != 0) && !rtl::isHighSurrogate(c)) + nSurrogate = 0; + } + + return nOutputLength; +} + +const ReplacementPair* SaxWriterHelper::findXMLReplacement(const sal_Unicode* pStr, + sal_Int32 nStrLen) +{ + for (size_t iter = 0; iter < m_Replacements.size(); ++iter) + { + if (m_Replacements[iter].replacement.getLength() > nStrLen) + continue; + sal_Int32 matches = m_Replacements[iter].replacement.compareTo( + std::u16string_view(pStr, m_Replacements[iter].replacement.getLength())); + if (matches == 0) + return &m_Replacements[iter]; + if (matches > 0) + return nullptr; + } + return nullptr; +} + +class SAXWriter : public WeakImplHelper<XWriter, XServiceInfo> +{ +public: + SAXWriter() + : m_bDocStarted(false) + , m_bIsCDATA(false) + , m_bForceLineBreak(false) + , m_bAllowLineBreak(false) + , m_nLevel(0) + { + } + +public: // XActiveDataSource + virtual void SAL_CALL setOutputStream(const Reference<XOutputStream>& aStream) override + { + try + { + // temporary: set same stream again to clear buffer + if (m_out == aStream && m_pSaxWriterHelper && m_bDocStarted) + m_pSaxWriterHelper->clearBuffer(); + else + { + m_out = aStream; + m_pSaxWriterHelper.reset(new SaxWriterHelper(m_out)); + m_bDocStarted = false; + m_nLevel = 0; + m_bIsCDATA = false; + } + } + catch (const SAXException& e) + { + throw css::lang::WrappedTargetRuntimeException( + e.Message, static_cast<OWeakObject*>(this), e.WrappedException); + } + } + virtual Reference<XOutputStream> SAL_CALL getOutputStream() override { return m_out; } + +public: // XDocumentHandler + virtual void SAL_CALL startDocument() override; + + virtual void SAL_CALL endDocument() override; + + virtual void SAL_CALL startElement(const OUString& aName, + const Reference<XAttributeList>& xAttribs) override; + + virtual void SAL_CALL endElement(const OUString& aName) override; + + virtual void SAL_CALL characters(const OUString& aChars) override; + + virtual void SAL_CALL ignorableWhitespace(const OUString& aWhitespaces) override; + virtual void SAL_CALL processingInstruction(const OUString& aTarget, + const OUString& aData) override; + virtual void SAL_CALL setDocumentLocator(const Reference<XLocator>& xLocator) override; + virtual void SAL_CALL setCustomEntityNames( + const ::css::uno::Sequence<::css::beans::Pair<::rtl::OUString, ::rtl::OUString>>& + replacements) override; + +public: // XExtendedDocumentHandler + virtual void SAL_CALL startCDATA() override; + virtual void SAL_CALL endCDATA() override; + virtual void SAL_CALL comment(const OUString& sComment) override; + virtual void SAL_CALL unknown(const OUString& sString) override; + virtual void SAL_CALL allowLineBreak() override; + +public: // XServiceInfo + OUString SAL_CALL getImplementationName() override; + Sequence<OUString> SAL_CALL getSupportedServiceNames() override; + sal_Bool SAL_CALL supportsService(const OUString& ServiceName) override; + +private: + sal_Int32 getIndentPrefixLength(sal_Int32 nFirstLineBreakOccurrence) noexcept; + + Reference<XOutputStream> m_out; + std::unique_ptr<SaxWriterHelper> m_pSaxWriterHelper; + + // Status information + bool m_bDocStarted : 1; + bool m_bIsCDATA : 1; + bool m_bForceLineBreak : 1; + bool m_bAllowLineBreak : 1; + sal_Int32 m_nLevel; +}; + +sal_Int32 SAXWriter::getIndentPrefixLength(sal_Int32 nFirstLineBreakOccurrence) noexcept +{ + sal_Int32 nLength = -1; + if (m_pSaxWriterHelper) + { + if (m_bForceLineBreak + || (m_bAllowLineBreak + && ((nFirstLineBreakOccurrence + m_pSaxWriterHelper->GetLastColumnCount()) + > MAXCOLUMNCOUNT))) + nLength = m_nLevel; + } + m_bForceLineBreak = false; + m_bAllowLineBreak = false; + return nLength; +} + +bool isFirstCharWhitespace(const sal_Unicode* p) noexcept { return *p == ' '; } + +// XServiceInfo +OUString SAXWriter::getImplementationName() { return "com.sun.star.extensions.xml.sax.Writer"; } + +// XServiceInfo +sal_Bool SAXWriter::supportsService(const OUString& ServiceName) +{ + return cppu::supportsService(this, ServiceName); +} + +// XServiceInfo +Sequence<OUString> SAXWriter::getSupportedServiceNames() +{ + return { "com.sun.star.xml.sax.Writer" }; +} + +void SAXWriter::startDocument() +{ + if (m_bDocStarted || !m_out.is() || !m_pSaxWriterHelper) + { + throw SAXException(); + } + m_bDocStarted = true; + m_pSaxWriterHelper->startDocument(); +} + +void SAXWriter::endDocument() +{ + if (!m_bDocStarted) + { + throw SAXException("endDocument called before startDocument", Reference<XInterface>(), + Any()); + } + if (m_nLevel) + { + throw SAXException("unexpected end of document", Reference<XInterface>(), Any()); + } + m_pSaxWriterHelper->endDocument(); + try + { + m_out->closeOutput(); + } + catch (const IOException&) + { + css::uno::Any anyEx = cppu::getCaughtException(); + throw SAXException("IO exception during closing the IO Stream", Reference<XInterface>(), + anyEx); + } +} + +void SAXWriter::startElement(const OUString& aName, const Reference<XAttributeList>& xAttribs) +{ + if (!m_bDocStarted) + { + SAXException except; + except.Message = "startElement called before startDocument"; + throw except; + } + if (m_bIsCDATA) + { + SAXException except; + except.Message = "startElement call not allowed with CDATA sections"; + throw except; + } + + sal_Int32 nLength(0); + if (m_bAllowLineBreak) + { + sal_Int32 nAttribCount = xAttribs.is() ? xAttribs->getLength() : 0; + + nLength++; // "<" + nLength += m_pSaxWriterHelper->calcXMLByteLength(aName, false, false); // the tag name + + sal_Int16 n; + for (n = 0; n < static_cast<sal_Int16>(nAttribCount); n++) + { + nLength++; // " " + OUString tmp = xAttribs->getNameByIndex(n); + + nLength += m_pSaxWriterHelper->calcXMLByteLength(tmp, false, false); + + nLength += 2; // =" + + tmp = xAttribs->getValueByIndex(n); + + nLength += m_pSaxWriterHelper->calcXMLByteLength(tmp, true, true); + + nLength += 1; // " + } + + nLength++; // '>' + } + + // Is there a new indentation necessary ? + sal_Int32 nPrefix(getIndentPrefixLength(nLength)); + + // write into sequence + if (nPrefix >= 0) + m_pSaxWriterHelper->insertIndentation(nPrefix); + + SaxInvalidCharacterError eRet(m_pSaxWriterHelper->startElement(aName, xAttribs)); + + m_nLevel++; + + if (eRet == SAX_WARNING) + { + SAXInvalidCharacterException except; + except.Message = "Invalid character during XML-Export in an attribute value"; + throw except; + } + else if (eRet == SAX_ERROR) + { + SAXException except; + except.Message = "Invalid character during XML-Export"; + throw except; + } +} + +void SAXWriter::endElement(const OUString& aName) +{ + if (!m_bDocStarted) + { + throw SAXException(); + } + m_nLevel--; + + if (m_nLevel < 0) + { + throw SAXException(); + } + bool bRet(true); + + // check here because Helper's endElement is not always called +#ifdef DBG_UTIL + assert(!m_pSaxWriterHelper->m_DebugStartedElements.empty()); + // Well-formedness constraint: Element Type Match + assert(aName == m_pSaxWriterHelper->m_DebugStartedElements.top()); + m_pSaxWriterHelper->m_DebugStartedElements.pop(); +#endif + + if (m_pSaxWriterHelper->FinishEmptyElement()) + m_bForceLineBreak = false; + else + { + // only ascii chars allowed + sal_Int32 nLength(0); + if (m_bAllowLineBreak) + nLength = 3 + m_pSaxWriterHelper->calcXMLByteLength(aName, false, false); + sal_Int32 nPrefix = getIndentPrefixLength(nLength); + + if (nPrefix >= 0) + m_pSaxWriterHelper->insertIndentation(nPrefix); + + bRet = m_pSaxWriterHelper->endElement(aName); + } + + if (!bRet) + { + SAXException except; + except.Message = "Invalid character during XML-Export"; + throw except; + } +} + +void SAXWriter::characters(const OUString& aChars) +{ + if (!m_bDocStarted) + { + SAXException except; + except.Message = "characters method called before startDocument"; + throw except; + } + + bool bThrowException(false); + if (!aChars.isEmpty()) + { + if (m_bIsCDATA) + bThrowException = !m_pSaxWriterHelper->writeString(aChars, false, false); + else + { + // Note : nFirstLineBreakOccurrence is not exact, because we don't know, how + // many 2 and 3 byte chars are inbetween. However this whole stuff + // is eitherway for pretty printing only, so it does not need to be exact. + sal_Int32 nLength(0); + sal_Int32 nIndentPrefix(-1); + if (m_bAllowLineBreak) + { + // returns position of first ascii 10 within the string, -1 when no 10 in string. + sal_Int32 nFirstLineBreakOccurrence = aChars.indexOf(LINEFEED); + + nLength = m_pSaxWriterHelper->calcXMLByteLength(aChars, !m_bIsCDATA, false); + nIndentPrefix = getIndentPrefixLength( + nFirstLineBreakOccurrence >= 0 ? nFirstLineBreakOccurrence : nLength); + } + else + nIndentPrefix = getIndentPrefixLength(nLength); + + // insert indentation + if (nIndentPrefix >= 0) + { + if (isFirstCharWhitespace(aChars.getStr())) + m_pSaxWriterHelper->insertIndentation(nIndentPrefix - 1); + else + m_pSaxWriterHelper->insertIndentation(nIndentPrefix); + } + bThrowException = !m_pSaxWriterHelper->writeString(aChars, true, false); + } + } + if (bThrowException) + { + SAXInvalidCharacterException except; + except.Message = "Invalid character during XML-Export"; + throw except; + } +} + +void SAXWriter::ignorableWhitespace(const OUString&) +{ + if (!m_bDocStarted) + { + throw SAXException(); + } + + m_bForceLineBreak = true; +} + +void SAXWriter::processingInstruction(const OUString& aTarget, const OUString& aData) +{ + if (!m_bDocStarted || m_bIsCDATA) + { + throw SAXException(); + } + + sal_Int32 nLength(0); + if (m_bAllowLineBreak) + { + nLength = 2; // "<?" + nLength += m_pSaxWriterHelper->calcXMLByteLength(aTarget, false, false); + + nLength += 1; // " " + + nLength += m_pSaxWriterHelper->calcXMLByteLength(aData, false, false); + + nLength += 2; // "?>" + } + + sal_Int32 nPrefix = getIndentPrefixLength(nLength); + + if (nPrefix >= 0) + m_pSaxWriterHelper->insertIndentation(nPrefix); + + if (!m_pSaxWriterHelper->processingInstruction(aTarget, aData)) + { + SAXException except; + except.Message = "Invalid character during XML-Export"; + throw except; + } +} + +void SAXWriter::setDocumentLocator(const Reference<XLocator>&) {} + +void SAXWriter::setCustomEntityNames( + const ::css::uno::Sequence<::css::beans::Pair<::rtl::OUString, ::rtl::OUString>>& replacements) +{ + m_pSaxWriterHelper->setCustomEntityNames(replacements); +} + +void SAXWriter::startCDATA() +{ + if (!m_bDocStarted || m_bIsCDATA) + { + throw SAXException(); + } + + sal_Int32 nPrefix = getIndentPrefixLength(9); + if (nPrefix >= 0) + m_pSaxWriterHelper->insertIndentation(nPrefix); + + m_pSaxWriterHelper->startCDATA(); + + m_bIsCDATA = true; +} + +void SAXWriter::endCDATA() +{ + if (!m_bDocStarted || !m_bIsCDATA) + { + SAXException except; + except.Message = "endCDATA was called without startCDATA"; + throw except; + } + + sal_Int32 nPrefix = getIndentPrefixLength(3); + if (nPrefix >= 0) + m_pSaxWriterHelper->insertIndentation(nPrefix); + + m_pSaxWriterHelper->endCDATA(); + + m_bIsCDATA = false; +} + +void SAXWriter::comment(const OUString& sComment) +{ + if (!m_bDocStarted || m_bIsCDATA) + { + throw SAXException(); + } + + sal_Int32 nLength(0); + if (m_bAllowLineBreak) + { + nLength = 4; // "<!--" + nLength += m_pSaxWriterHelper->calcXMLByteLength(sComment, false, false); + + nLength += 3; + } + + sal_Int32 nPrefix = getIndentPrefixLength(nLength); + if (nPrefix >= 0) + m_pSaxWriterHelper->insertIndentation(nPrefix); + + if (!m_pSaxWriterHelper->comment(sComment)) + { + SAXException except; + except.Message = "Invalid character during XML-Export"; + throw except; + } +} + +void SAXWriter::allowLineBreak() +{ + if (!m_bDocStarted || m_bAllowLineBreak) + { + throw SAXException(); + } + + m_bAllowLineBreak = true; +} + +void SAXWriter::unknown(const OUString& sString) +{ + if (!m_bDocStarted) + { + throw SAXException(); + } + if (m_bIsCDATA) + { + throw SAXException(); + } + + if (sString.startsWith("<?xml")) + return; + + sal_Int32 nLength(0); + if (m_bAllowLineBreak) + nLength = m_pSaxWriterHelper->calcXMLByteLength(sString, false, false); + + sal_Int32 nPrefix = getIndentPrefixLength(nLength); + if (nPrefix >= 0) + m_pSaxWriterHelper->insertIndentation(nPrefix); + + if (!m_pSaxWriterHelper->writeString(sString, false, false)) + { + SAXException except; + except.Message = "Invalid character during XML-Export"; + throw except; + } +} + +} // namespace + +extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface* +com_sun_star_extensions_xml_sax_Writer_get_implementation(css::uno::XComponentContext*, + css::uno::Sequence<css::uno::Any> const&) +{ + return cppu::acquire(new SAXWriter); +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |