i18npool/source/transliteration/ignoreDiacritics_CTL.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
  10 #include <comphelper/sequence.hxx>
  11 #include <rtl/ustrbuf.hxx>
  12 #include <transliteration_Ignore.hxx>
  13 #include <unicode/translit.h>
  14
  15 namespace i18npool {
  16
  17 ignoreDiacritics_CTL::ignoreDiacritics_CTL()
  18 {
  19     func = nullptr;
  20     table = nullptr;
  21     map = nullptr;
  22     transliterationName = "ignoreDiacritics_CTL";
  23     implementationName = "com.sun.star.i18n.Transliteration.ignoreDiacritics_CTL";
  24
  25     UErrorCode nStatus = U_ZERO_ERROR;
  26     m_transliterator = icu::Transliterator::createInstance("NFD; [:M:] Remove; NFC",
  27             UTRANS_FORWARD, nStatus);
  28     if (U_FAILURE(nStatus))
  29         m_transliterator = nullptr;
  30 }
  31
  32 sal_Unicode SAL_CALL
  33 ignoreDiacritics_CTL::transliterateChar2Char(sal_Unicode nInChar)
  34 {
  35     if (!m_transliterator)
  36         throw css::uno::RuntimeException();
  37
  38     icu::UnicodeString aChar(nInChar);
  39     m_transliterator->transliterate(aChar);
  40
  41     if (aChar.isEmpty())
  42         return 0xffff; // Skip this character.
  43
  44     if (aChar.length() > 1)
  45         return nInChar; // Don't know what to do here, return the original.
  46
  47     return aChar[0];
  48 }
  49
  50 OUString
  51 ignoreDiacritics_CTL::foldingImpl(const OUString& rInStr, sal_Int32 nStartPos,
  52     sal_Int32 nCount, css::uno::Sequence<sal_Int32>& rOffset, bool useOffset)
  53 {
  54     if (!m_transliterator)
  55         throw css::uno::RuntimeException();
  56
  57     if (nStartPos < 0 || nStartPos + nCount > rInStr.getLength())
  58         throw css::uno::RuntimeException();
  59
  60     if (useOffset)
  61     {
  62         OUStringBuffer aOutBuf(nCount);
  63
  64         std::vector<sal_Int32> aOffset;
  65         aOffset.reserve(nCount);
  66
  67         sal_Int32 nPosition = nStartPos;
  68         while (nPosition < nStartPos + nCount)
  69         {
  70             sal_Int32 nIndex = nPosition;
  71             UChar32 nChar = rInStr.iterateCodePoints(&nIndex);
  72             icu::UnicodeString aUStr(nChar);
  73             m_transliterator->transliterate(aUStr);
  74
  75             aOutBuf.append(reinterpret_cast<const sal_Unicode*>(aUStr.getBuffer()), aUStr.length());
  76
  77             std::fill_n(std::back_inserter(aOffset), aUStr.length(), nPosition);
  78
  79             nPosition = nIndex;
  80         }
  81
  82         rOffset = comphelper::containerToSequence(aOffset);
  83         return aOutBuf.makeStringAndClear();
  84     }
  85     else
  86     {
  87         icu::UnicodeString aUStr(reinterpret_cast<const UChar*>(rInStr.getStr()) + nStartPos, nCount);
  88         m_transliterator->transliterate(aUStr);
  89         return OUString(reinterpret_cast<const sal_Unicode*>(aUStr.getBuffer()), aUStr.length());
  90     }
  91 }
  92
  93 }
  94
  95 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */