1 files changed, 296 insertions, 0 deletions
diff --git a/i18npool/source/transliteration/transliteration_body.cxx b/i18npool/source/transliteration/transliteration_body.cxx
new file mode 100644
index 000000000..f12b152dc
--- /dev/null
+++ b/i18npool/source/transliteration/transliteration_body.cxx
@@ -0,0 +1,296 @@
+/* -*- 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 .
+ */
+// Silence spurious Werror=maybe-uninitialized in transliterateImpl emitted at least by GCC 11.2.0
+#if defined __GNUC__ && !defined __clang__
+#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+#endif
+
+#include <rtl/ref.hxx>
+#include <i18nutil/casefolding.hxx>
+#include <i18nutil/unicode.hxx>
+#include <com/sun/star/i18n/MultipleCharsOutputException.hpp>
+#include <com/sun/star/i18n/TransliterationType.hpp>
+#include <comphelper/processfactory.hxx>
+#include <comphelper/sequence.hxx>
+#include <o3tl/temporary.hxx>
+
+#include <characterclassificationImpl.hxx>
+
+#include <transliteration_body.hxx>
+#include <memory>
+#include <numeric>
+
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::i18n;
+using namespace ::com::sun::star::lang;
+
+namespace i18npool {
+
+Transliteration_body::Transliteration_body()
+{
+    nMappingType = MappingType::NONE;
+    transliterationName = "Transliteration_body";
+    implementationName = "com.sun.star.i18n.Transliteration.Transliteration_body";
+}
+
+sal_Int16 SAL_CALL Transliteration_body::getType()
+{
+    return TransliterationType::ONE_TO_ONE;
+}
+
+sal_Bool SAL_CALL Transliteration_body::equals(
+    const OUString& /*str1*/, sal_Int32 /*pos1*/, sal_Int32 /*nCount1*/, sal_Int32& /*nMatch1*/,
+    const OUString& /*str2*/, sal_Int32 /*pos2*/, sal_Int32 /*nCount2*/, sal_Int32& /*nMatch2*/)
+{
+    throw RuntimeException();
+}
+
+Sequence< OUString > SAL_CALL
+Transliteration_body::transliterateRange( const OUString& str1, const OUString& str2 )
+{
+    return { str1, str2 };
+}
+
+static MappingType lcl_getMappingTypeForToggleCase( MappingType nMappingType, sal_Unicode cChar )
+{
+    MappingType nRes = nMappingType;
+
+    // take care of TOGGLE_CASE transliteration:
+    // nMappingType should not be a combination of flags, thuse we decide now
+    // which one to use.
+    if (nMappingType == (MappingType::LowerToUpper | MappingType::UpperToLower))
+    {
+        const sal_Int16 nType = unicode::getUnicodeType( cChar );
+        if (nType & 0x02 /* lower case*/)
+            nRes = MappingType::LowerToUpper;
+        else
+        {
+            // should also work properly for non-upper characters like white spaces, numbers, ...
+            nRes = MappingType::UpperToLower;
+        }
+    }
+
+    return nRes;
+}
+
+OUString
+Transliteration_body::transliterateImpl(
+    const OUString& inStr, sal_Int32 startPos, sal_Int32 nCount,
+    Sequence< sal_Int32 >* pOffset)
+{
+    const sal_Unicode *in = inStr.getStr() + startPos;
+
+    // We could assume that most calls result in identical string lengths,
+    // thus using a preallocated OUStringBuffer could be an easy way
+    // to assemble the return string without too much hassle. However,
+    // for single characters the OUStringBuffer::append() method is quite
+    // expensive compared to a simple array operation, so it pays here
+    // to copy the final result instead.
+
+    // Allocate the max possible buffer. Try to use stack instead of heap,
+    // which would have to be reallocated most times anyways.
+    constexpr sal_Int32 nLocalBuf = 2048;
+    sal_Unicode* out;
+    std::unique_ptr<sal_Unicode[]> pHeapBuf;
+    if (nCount <= nLocalBuf)
+        out = static_cast<sal_Unicode*>(alloca(nCount * NMAPPINGMAX * sizeof(sal_Unicode)));
+    else
+    {
+        pHeapBuf.reset(new sal_Unicode[ nCount * NMAPPINGMAX ]);
+        out = pHeapBuf.get();
+    }
+
+    sal_Int32 j = 0;
+    // Two different blocks to eliminate the if(useOffset) condition inside the loop.
+    // Yes, on massive use even such small things do count.
+    if ( pOffset )
+    {
+        std::vector<sal_Int32> aVec;
+        aVec.reserve(std::max<sal_Int32>(nLocalBuf, nCount) * NMAPPINGMAX);
+
+        for (sal_Int32 i = 0; i < nCount; i++)
+        {
+            // take care of TOGGLE_CASE transliteration:
+            MappingType nTmpMappingType = lcl_getMappingTypeForToggleCase( nMappingType, in[i] );
+
+            const i18nutil::Mapping &map = i18nutil::casefolding::getValue( in, i, nCount, aLocale, nTmpMappingType );
+            std::fill_n(std::back_inserter(aVec), map.nmap, i + startPos);
+            std::copy_n(map.map, map.nmap, out + j);
+            j += map.nmap;
+        }
+
+        *pOffset = comphelper::containerToSequence(aVec);
+    }
+    else
+    {
+        for ( sal_Int32 i = 0; i < nCount; i++)
+        {
+            // take care of TOGGLE_CASE transliteration:
+            MappingType nTmpMappingType = lcl_getMappingTypeForToggleCase( nMappingType, in[i] );
+
+            const i18nutil::Mapping &map = i18nutil::casefolding::getValue( in, i, nCount, aLocale, nTmpMappingType );
+            std::copy_n(map.map, map.nmap, out + j);
+            j += map.nmap;
+        }
+    }
+
+    return OUString(out, j);
+}
+
+OUString SAL_CALL
+Transliteration_body::transliterateChar2String( sal_Unicode inChar )
+{
+    const i18nutil::Mapping &map = i18nutil::casefolding::getValue(&inChar, 0, 1, aLocale, nMappingType);
+    rtl_uString* pStr = rtl_uString_alloc(map.nmap);
+    sal_Unicode* out = pStr->buffer;
+    sal_Int32 i;
+
+    for (i = 0; i < map.nmap; i++)
+        out[i] = map.map[i];
+    out[i] = 0;
+
+    return OUString( pStr, SAL_NO_ACQUIRE );
+}
+
+sal_Unicode SAL_CALL
+Transliteration_body::transliterateChar2Char( sal_Unicode inChar )
+{
+    const i18nutil::Mapping &map = i18nutil::casefolding::getValue(&inChar, 0, 1, aLocale, nMappingType);
+    if (map.nmap > 1)
+        throw MultipleCharsOutputException();
+    return map.map[0];
+}
+
+OUString
+Transliteration_body::foldingImpl( const OUString& inStr, sal_Int32 startPos, sal_Int32 nCount,
+    Sequence< sal_Int32 >* pOffset)
+{
+    return transliterateImpl(inStr, startPos, nCount, pOffset);
+}
+
+Transliteration_casemapping::Transliteration_casemapping()
+{
+    nMappingType = MappingType::NONE;
+    transliterationName = "casemapping(generic)";
+    implementationName = "com.sun.star.i18n.Transliteration.Transliteration_casemapping";
+}
+
+Transliteration_u2l::Transliteration_u2l()
+{
+    nMappingType = MappingType::UpperToLower;
+    transliterationName = "upper_to_lower(generic)";
+    implementationName = "com.sun.star.i18n.Transliteration.Transliteration_u2l";
+}
+
+Transliteration_l2u::Transliteration_l2u()
+{
+    nMappingType = MappingType::LowerToUpper;
+    transliterationName = "lower_to_upper(generic)";
+    implementationName = "com.sun.star.i18n.Transliteration.Transliteration_l2u";
+}
+
+Transliteration_togglecase::Transliteration_togglecase()
+{
+    // usually nMappingType must NOT be a combination of different flags here,
+    // but we take care of that problem in Transliteration_body::transliterate above
+    // before that value is used. There we will decide which of both is to be used on
+    // a per character basis.
+    nMappingType = MappingType::LowerToUpper | MappingType::UpperToLower;
+    transliterationName = "toggle(generic)";
+    implementationName = "com.sun.star.i18n.Transliteration.Transliteration_togglecase";
+}
+
+Transliteration_titlecase::Transliteration_titlecase()
+{
+    nMappingType = MappingType::ToTitle;
+    transliterationName = "title(generic)";
+    implementationName = "com.sun.star.i18n.Transliteration.Transliteration_titlecase";
+}
+
+/// @throws RuntimeException
+static OUString transliterate_titlecase_Impl(
+    std::u16string_view inStr, sal_Int32 startPos, sal_Int32 nCount,
+    const Locale &rLocale,
+    Sequence< sal_Int32 >* pOffset )
+{
+    const OUString aText( inStr.substr( startPos, nCount ) );
+
+    OUString aRes;
+    if (!aText.isEmpty())
+    {
+        Reference< XComponentContext > xContext = ::comphelper::getProcessComponentContext();
+        rtl::Reference< CharacterClassificationImpl > xCharClassImpl( new CharacterClassificationImpl( xContext ) );
+
+        // because xCharClassImpl.toTitle does not handle ligatures or Beta but will raise
+        // an exception we need to handle the first chara manually...
+
+        // we don't want to change surrogates by accident, thuse we use proper code point iteration
+        sal_uInt32 cFirstChar = aText.iterateCodePoints( &o3tl::temporary(sal_Int32(0)) );
+        OUString aResolvedLigature( &cFirstChar, 1 );
+        // toUpper can be used to properly resolve ligatures and characters like Beta
+        aResolvedLigature = xCharClassImpl->toUpper( aResolvedLigature, 0, aResolvedLigature.getLength(), rLocale );
+        // since toTitle will leave all-uppercase text unchanged we first need to
+        // use toLower to bring possible 2nd and following chars in lowercase
+        aResolvedLigature = xCharClassImpl->toLower( aResolvedLigature, 0, aResolvedLigature.getLength(), rLocale );
+        sal_Int32 nResolvedLen = aResolvedLigature.getLength();
+
+        // now we can properly use toTitle to get the expected result for the resolved string.
+        // The rest of the text should just become lowercase.
+        aRes = xCharClassImpl->toTitle( aResolvedLigature, 0, nResolvedLen, rLocale ) +
+               xCharClassImpl->toLower( aText, 1, aText.getLength() - 1, rLocale );
+        if (pOffset)
+        {
+            pOffset->realloc( aRes.getLength() );
+
+            auto [begin, end] = asNonConstRange(*pOffset);
+            sal_Int32* pOffsetInt = std::fill_n(begin, nResolvedLen, 0);
+            std::iota(pOffsetInt, end, 1);
+        }
+    }
+    return aRes;
+}
+
+// this function expects to be called on a word-by-word basis,
+// namely that startPos points to the first char of the word
+OUString Transliteration_titlecase::transliterateImpl(
+    const OUString& inStr, sal_Int32 startPos, sal_Int32 nCount,
+    Sequence< sal_Int32 >* pOffset )
+{
+    return transliterate_titlecase_Impl( inStr, startPos, nCount, aLocale, pOffset );
+}
+
+Transliteration_sentencecase::Transliteration_sentencecase()
+{
+    nMappingType = MappingType::ToTitle;  // though only to be applied to the first word...
+    transliterationName = "sentence(generic)";
+    implementationName = "com.sun.star.i18n.Transliteration.Transliteration_sentencecase";
+}
+
+// this function expects to be called on a sentence-by-sentence basis,
+// namely that startPos points to the first word (NOT first char!) in the sentence
+OUString Transliteration_sentencecase::transliterateImpl(
+    const OUString& inStr, sal_Int32 startPos, sal_Int32 nCount,
+    Sequence< sal_Int32 >* pOffset )
+{
+    return transliterate_titlecase_Impl( inStr, startPos, nCount, aLocale, pOffset );
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */