void font_face_set::get_string_info(string_info & info, UnicodeString const& ustr, char_properties *format)
{
double avg_height = character_dimensions('X').height();
UErrorCode err = U_ZERO_ERROR;
UnicodeString reordered;
UnicodeString shaped;
int32_t length = ustr.length();
UBiDi *bidi = ubidi_openSized(length, 0, &err);
ubidi_setPara(bidi, ustr.getBuffer(), length, UBIDI_DEFAULT_LTR, 0, &err);
ubidi_writeReordered(bidi, reordered.getBuffer(length),
length, UBIDI_DO_MIRRORING, &err);
reordered.releaseBuffer(length);
u_shapeArabic(reordered.getBuffer(), length,
shaped.getBuffer(length), length,
U_SHAPE_LETTERS_SHAPE | U_SHAPE_LENGTH_FIXED_SPACES_NEAR |
U_SHAPE_TEXT_DIRECTION_VISUAL_LTR, &err);
shaped.releaseBuffer(length);
if (U_SUCCESS(err)) {
StringCharacterIterator iter(shaped);
for (iter.setToStart(); iter.hasNext();) {
UChar ch = iter.nextPostInc();
char_info char_dim = character_dimensions(ch);
char_dim.format = format;
char_dim.avg_height = avg_height;
info.add_info(char_dim);
}
}
#if (U_ICU_VERSION_MAJOR_NUM*100 + U_ICU_VERSION_MINOR_NUM >= 406)
if (ubidi_getBaseDirection(ustr.getBuffer(), length) == UBIDI_RTL)
{
info.set_rtl(true);
}
#endif
ubidi_close(bidi);
}
void font_face_set::get_string_info(string_info & info)
{
unsigned width = 0;
unsigned height = 0;
UErrorCode err = U_ZERO_ERROR;
UnicodeString const& ustr = info.get_string();
const UChar * text = ustr.getBuffer();
UBiDi * bidi = ubidi_openSized(ustr.length(),0,&err);
if (U_SUCCESS(err))
{
ubidi_setPara(bidi,text,ustr.length(), UBIDI_DEFAULT_LTR,0,&err);
if (U_SUCCESS(err))
{
int32_t count = ubidi_countRuns(bidi,&err);
int32_t logicalStart;
int32_t length;
for (int32_t i=0; i< count;++i)
{
if (UBIDI_LTR == ubidi_getVisualRun(bidi,i,&logicalStart,&length))
{
do {
UChar ch = text[logicalStart++];
dimension_t char_dim = character_dimensions(ch);
info.add_info(ch, char_dim.width, char_dim.height);
width += char_dim.width;
height = char_dim.height > height ? char_dim.height : height;
} while (--length > 0);
}
else
{
logicalStart += length;
int32_t j=0,i=length;
UnicodeString arabic;
UChar * buf = arabic.getBuffer(length);
do {
UChar ch = text[--logicalStart];
buf[j++] = ch;
} while (--i > 0);
arabic.releaseBuffer(length);
if ( *arabic.getBuffer() >= 0x0600 && *arabic.getBuffer() <= 0x06ff)
{
UnicodeString shaped;
u_shapeArabic(arabic.getBuffer(),arabic.length(),shaped.getBuffer(arabic.length()),arabic.length(),
U_SHAPE_LETTERS_SHAPE|U_SHAPE_LENGTH_FIXED_SPACES_NEAR|
U_SHAPE_TEXT_DIRECTION_VISUAL_LTR
,&err);
shaped.releaseBuffer(arabic.length());
if (U_SUCCESS(err))
{
for (int j=0;j<shaped.length();++j)
{
dimension_t char_dim = character_dimensions(shaped[j]);
info.add_info(shaped[j], char_dim.width, char_dim.height);
width += char_dim.width;
height = char_dim.height > height ? char_dim.height : height;
}
}
} else {
// Non-Arabic RTL
for (int j=0;j<arabic.length();++j)
{
dimension_t char_dim = character_dimensions(arabic[j]);
info.add_info(arabic[j], char_dim.width, char_dim.height);
width += char_dim.width;
height = char_dim.height > height ? char_dim.height : height;
}
}
}
}
}
ubidi_close(bidi);
}
info.set_dimensions(width, height);
}
