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 <rtl/ustrbuf.hxx>
  11 #include <transliteration_Ignore.hxx>
  12 #include <unicode/translit.h>
  13
  14 namespace i18npool {
  15
  16 ignoreDiacritics_CTL::ignoreDiacritics_CTL()
  17 {
  18     func = nullptr;
  19     table = nullptr;
  20     map = nullptr;
  21     transliterationName = "ignoreDiacritics_CTL";
  22     implementationName = "com.sun.star.i18n.Transliteration.ignoreDiacritics_CTL";
  23
  24     UErrorCode nStatus = U_ZERO_ERROR;
  25     m_transliterator = icu::Transliterator::createInstance("NFD; [:M:] Remove; NFC",
  26             UTRANS_FORWARD, nStatus);
  27     if (U_FAILURE(nStatus))
  28         m_transliterator = nullptr;
  29 }
  30
  31 sal_Unicode SAL_CALL
  32 ignoreDiacritics_CTL::transliterateChar2Char(sal_Unicode nInChar)
  33 {
  34     if (!m_transliterator)
  35         throw css::uno::RuntimeException();
  36
  37     icu::UnicodeString aChar(nInChar);
  38     m_transliterator->transliterate(aChar);
  39
  40     if (aChar.isEmpty())
  41         return 0xffff; // Skip this character.
  42
  43     if (aChar.length() > 1)
  44         return nInChar; // Don't know what to do here, return the original.
  45
  46     return aChar[0];
  47 }
  48
  49 OUString
  50 ignoreDiacritics_CTL::foldingImpl(const OUString& rInStr, sal_Int32 nStartPos,
  51     sal_Int32 nCount, css::uno::Sequence<sal_Int32>& rOffset, bool useOffset)
  52 {
  53     if (!m_transliterator)
  54         throw css::uno::RuntimeException();
  55
  56     if (nStartPos < 0 || nStartPos + nCount > rInStr.getLength())
  57         throw css::uno::RuntimeException();
  58
  59     if (useOffset)
  60     {
  61         OUStringBuffer aOutBuf(nCount);
  62         rOffset.realloc(nCount);
  63
  64         sal_Int32 nPosition = nStartPos;
  65         sal_Int32 nOffset = 0;
  66         while (nPosition < nStartPos + nCount)
  67         {
  68             sal_Int32 nIndex = nPosition;
  69             UChar32 nChar = rInStr.iterateCodePoints(&nIndex);
  70             icu::UnicodeString aUStr(nChar);
  71             m_transliterator->transliterate(aUStr);
  72
  73             if (nOffset + aUStr.length() > rOffset.getLength())
  74                 rOffset.realloc(rOffset.getLength() + aUStr.length());
  75             sal_Int32* pOffset = rOffset.getArray();
  76
  77             aOutBuf.append(reinterpret_cast<const sal_Unicode*>(aUStr.getBuffer()), aUStr.length());
  78
  79             for (const sal_Int32 nOffsetEnd = nOffset+aUStr.length(); nOffset < nOffsetEnd; nOffset++)
  80                 pOffset[nOffset] = nPosition;
  81
  82             nPosition = nIndex;
  83         }
  84
  85         rOffset.realloc(aOutBuf.getLength());
  86         return aOutBuf.makeStringAndClear();
  87     }
  88     else
  89     {
  90         icu::UnicodeString aUStr(reinterpret_cast<const UChar*>(rInStr.getStr()) + nStartPos, nCount);
  91         m_transliterator->transliterate(aUStr);
  92         return OUString(reinterpret_cast<const sal_Unicode*>(aUStr.getBuffer()), aUStr.length());
  93     }
  94 }
  95
  96 }
  97
  98 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */