/**
* Sets "inverse" mode on the <code>UBiDi</code> object.
*
* @param pTransform Pointer to the <code>UBiDiTransform</code> structure.
* @param pErrorCode Pointer to the error code value.
*
* @return Whether or not this function modifies the text. Besides the return
* value, the caller should also check <code>U_SUCCESS(*pErrorCode)</code>.
*/
static UBool
action_setInverse(UBiDiTransform *pTransform, UErrorCode *pErrorCode)
{
ubidi_setInverse(pTransform->pBidi, TRUE);
ubidi_setReorderingMode(pTransform->pBidi, UBIDI_REORDER_INVERSE_LIKE_DIRECT);
return FALSE;
}
/**
* Sets "runs only" reordering mode indicating a Logical LTR <-> Logical RTL
* transformation.
*
* @param pTransform Pointer to the <code>UBiDiTransform</code> structure.
* @param pErrorCode Pointer to the error code value.
*
* @return Whether or not this function modifies the text. Besides the return
* value, the caller should also check <code>U_SUCCESS(*pErrorCode)</code>.
*/
static UBool
action_setRunsOnly(UBiDiTransform *pTransform, UErrorCode *pErrorCode)
{
(void)pErrorCode;
ubidi_setReorderingMode(pTransform->pBidi, UBIDI_REORDER_RUNS_ONLY);
return FALSE;
}
OSMAND_CORE_API QString OSMAND_CORE_CALL OsmAnd::ICU::convertToVisualOrder(const QString& input)
{
QString output;
const auto len = input.length();
UErrorCode icuError = U_ZERO_ERROR;
bool ok = true;
// Allocate ICU BiDi context
const auto pContext = ubidi_openSized(len, 0, &icuError);
if(pContext == nullptr || !U_SUCCESS(icuError))
{
LogPrintf(LogSeverityLevel::Error, "ICU error: %d", icuError);
return input;
}
// Configure context to reorder from logical to visual
ubidi_setReorderingMode(pContext, UBIDI_REORDER_DEFAULT);
// Set data
ubidi_setPara(pContext, reinterpret_cast<const UChar*>(input.unicode()), len, UBIDI_DEFAULT_RTL, nullptr, &icuError);
ok = U_SUCCESS(icuError);
if(ok)
{
QVector<UChar> reordered(len);
ubidi_writeReordered(pContext, reordered.data(), len, UBIDI_DO_MIRRORING | UBIDI_REMOVE_BIDI_CONTROLS, &icuError);
ok = U_SUCCESS(icuError);
if(ok)
{
QVector<UChar> reshaped(len);
const auto newLen = u_shapeArabic(reordered.constData(), len, reshaped.data(), len, U_SHAPE_TEXT_DIRECTION_VISUAL_LTR | U_SHAPE_LETTERS_SHAPE | U_SHAPE_LENGTH_FIXED_SPACES_AT_END, &icuError);
ok = U_SUCCESS(icuError);
if(ok)
{
output = qMove(QString(reinterpret_cast<const QChar*>(reshaped.constData()), newLen));
}
}
}
// Release context
ubidi_close(pContext);
if(!ok)
{
LogPrintf(LogSeverityLevel::Error, "ICU error: %d", icuError);
return input;
}
return output;
}
