/********************************************************************
 * COPYRIGHT:
 * Copyright (c) 1999-2003, International Business Machines Corporation and
 * others. All Rights Reserved.
 ********************************************************************/

#include "unaccent.h"

const char UnaccentTransliterator::fgClassID = 0;

/**
 * Constructor
 */
UnaccentTransliterator::UnaccentTransliterator() :
    normalizer("", UNORM_NFD),
    Transliterator("Unaccent", 0) {
}

/**
 * Destructor
 */
UnaccentTransliterator::~UnaccentTransliterator() {
}

/**
 * Remove accents from a character using Normalizer.
 */
UChar UnaccentTransliterator::unaccent(UChar c) const {
    UnicodeString str(c);
    UErrorCode status = U_ZERO_ERROR;
    UnaccentTransliterator* t = (UnaccentTransliterator*)this;

    t->normalizer.setText(str, status);
    if (U_FAILURE(status)) {
        return c;
    }
    return (UChar) t->normalizer.next();
}

/**
 * Implement Transliterator API
 */
void UnaccentTransliterator::handleTransliterate(Replaceable& text,
                                                 UTransPosition& index,
                                                 UBool incremental) const {
    UnicodeString str("a");
    while (index.start < index.limit) {
        UChar c = text.charAt(index.start);
        UChar d = unaccent(c);
        if (c != d) {
            str.setCharAt(0, d);
            text.handleReplaceBetween(index.start, index.start+1, str);
        }
        index.start++;
    }
}

/* Remove accents from a String */
UnaccentTransliterator unaccent;
UnicodeString unicodeAccentedString;

std::string &removeAccents(std::string &text) {
  printStringInHexadecimal(text.c_str());
  unicodeAccentedString = UnicodeString(text.c_str());
  printStringInHexadecimal(unicodeAccentedString);
  unaccent.transliterate(unicodeAccentedString);
  text.clear();
  unicodeAccentedString.toUTF8String(text);
  return text;
}

void printStringInHexadecimal(UnicodeString s) {
  std::cout << std::showbase << std::hex;
  for (int i=0; i<s.length(); i++) {
    char c = (char)((s.getTerminatedBuffer())[i]);
    if (c & 0x80)
      std::cout << (c & 0xff) << " ";
    else
      std::cout << c << " ";
  }
  std::cout << std::endl;
}

void printStringInHexadecimal(const char *s) {
  std::cout << std::showbase << std::hex;
  for (char const* pc = s; *pc; ++pc) {
    if (*pc & 0x80)
      std::cout << (*pc & 0xff);
    else
      std::cout << *pc;
    std::cout << ' ';
  }
  std::cout << std::endl;
}