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#include "base/text_normalizer.h"
#include <string>
#include "base/util.h"
namespace mozc {
namespace {
#ifdef OS_WIN
// Unicode vender specific character table:
// http://hp.vector.co.jp/authors/VA010341/unicode/
// http://www.notoinsatu.co.jp/font/omake/OTF_other.pdf
//
// Example: WAVE_DASH / FULLWIDTH TILDE
// http://ja.wikipedia.org/wiki/%E6%B3%A2%E3%83%80%E3%83%83%E3%82%B7%E3%83%A5
// Windows CP932 (shift-jis) maps WAVE_DASH to FULL_WIDTH_TILDA.
// Since the font of WAVE-DASH is ugly on Windows, here we convert WAVE-DHASH to
// FULL_WIDTH_TILDA as CP932 does.
//
// As Unicode has became the defact default encoding. We have reduced
// the number of characters to be normalized.
inline char32 NormalizeCharForWindows(char32 c) {
switch (c) {
case 0x301C: // WAVE DASH
return 0xFF5E; // FULLWIDTH TILDE
break;
case 0x2212: // MINUS SIGN
return 0xFF0D; // FULLWIDTH HYPHEN MINUS
break;
default:
return c;
break;
}
}
#endif // OS_WIN
} // namespace
void TextNormalizer::NormalizeText(StringPiece input, string *output) {
#ifdef OS_WIN
output->clear();
for (ConstChar32Iterator iter(input); !iter.Done(); iter.Next()) {
Util::UCS4ToUTF8Append(NormalizeCharForWindows(iter.Get()), output);
}
#else
output->assign(input.data(), input.size());
#endif
}
} // namespace mozc