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#include "drape/bidi.hpp"
#include "base/logging.hpp"
#include "3party/icu/common/unicode/ubidi.h"
#include "3party/icu/common/unicode/unistr.h"
#include "3party/icu/common/unicode/ushape.h"
namespace bidi
{
strings::UniString log2vis(strings::UniString const & str)
{
std::string str8 = strings::ToUtf8(str);
if (strings::IsASCIIString(str8))
return str;
UBiDi * bidi = ubidi_open();
UErrorCode errorCode = U_ZERO_ERROR;
UnicodeString ustr(str8.c_str());
ubidi_setPara(bidi, ustr.getTerminatedBuffer(), ustr.length(), UBIDI_DEFAULT_LTR, nullptr, &errorCode);
UBiDiDirection const direction = ubidi_getDirection(bidi);
if (direction == UBIDI_LTR || direction == UBIDI_NEUTRAL)
{
ubidi_close(bidi);
return str;
}
std::vector<UChar> buff(ustr.length() * 2, 0);
u_shapeArabic(ustr.getTerminatedBuffer(), ustr.length(), buff.data(), static_cast<uint32_t>(buff.size()),
U_SHAPE_LETTERS_SHAPE_TASHKEEL_ISOLATED, &errorCode);
if (errorCode != U_ZERO_ERROR)
{
LOG(LWARNING, ("Shape arabic failed, icu error:", errorCode));
return str;
}
UnicodeString shaped(buff.data());
ubidi_setPara(bidi, shaped.getTerminatedBuffer(), shaped.length(), direction, nullptr, &errorCode);
ubidi_writeReordered(bidi, buff.data(), static_cast<uint32_t>(buff.size()), 0, &errorCode);
if (errorCode != U_ZERO_ERROR)
return str;
UnicodeString reordered(buff.data());
ubidi_close(bidi);
std::string out;
reordered.toUTF8String(out);
return strings::MakeUniString(out);
}
}
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