/**
* Return true if the vertex with vid is owned by this shard.
*/
inline const std::vector<graph_shard_id_t> mirrors_by_id(const graph_vid_t& vid) const {
size_t pos = shard_impl.vertex_index.get_index(vid);
return mirrors(pos);
}
// Helper sets the character attribute properties and sets up the script table.
// Does not set tops and bottoms.
void SetupBasicProperties(bool report_errors, bool decompose,
UNICHARSET* unicharset) {
for (int unichar_id = 0; unichar_id < unicharset->size(); ++unichar_id) {
// Convert any custom ligatures.
const char* unichar_str = unicharset->id_to_unichar(unichar_id);
for (int i = 0; UNICHARSET::kCustomLigatures[i][0] != nullptr; ++i) {
if (!strcmp(UNICHARSET::kCustomLigatures[i][1], unichar_str)) {
unichar_str = UNICHARSET::kCustomLigatures[i][0];
break;
}
}
// Convert the unichar to UTF32 representation
std::vector<char32> uni_vector = UNICHAR::UTF8ToUTF32(unichar_str);
// Assume that if the property is true for any character in the string,
// then it holds for the whole "character".
bool unichar_isalpha = false;
bool unichar_islower = false;
bool unichar_isupper = false;
bool unichar_isdigit = false;
bool unichar_ispunct = false;
for (char32 u_ch : uni_vector) {
if (u_isalpha(u_ch)) unichar_isalpha = true;
if (u_islower(u_ch)) unichar_islower = true;
if (u_isupper(u_ch)) unichar_isupper = true;
if (u_isdigit(u_ch)) unichar_isdigit = true;
if (u_ispunct(u_ch)) unichar_ispunct = true;
}
unicharset->set_isalpha(unichar_id, unichar_isalpha);
unicharset->set_islower(unichar_id, unichar_islower);
unicharset->set_isupper(unichar_id, unichar_isupper);
unicharset->set_isdigit(unichar_id, unichar_isdigit);
unicharset->set_ispunctuation(unichar_id, unichar_ispunct);
tesseract::IcuErrorCode err;
unicharset->set_script(unichar_id, uscript_getName(
uscript_getScript(uni_vector[0], err)));
const int num_code_points = uni_vector.size();
// Obtain the lower/upper case if needed and record it in the properties.
unicharset->set_other_case(unichar_id, unichar_id);
if (unichar_islower || unichar_isupper) {
std::vector<char32> other_case(num_code_points, 0);
for (int i = 0; i < num_code_points; ++i) {
// TODO(daria): Ideally u_strToLower()/ustrToUpper() should be used.
// However since they deal with UChars (so need a conversion function
// from char32 or UTF8string) and require a meaningful locale string,
// for now u_tolower()/u_toupper() are used.
other_case[i] = unichar_islower ? u_toupper(uni_vector[i]) :
u_tolower(uni_vector[i]);
}
std::string other_case_uch = UNICHAR::UTF32ToUTF8(other_case);
UNICHAR_ID other_case_id =
unicharset->unichar_to_id(other_case_uch.c_str());
if (other_case_id != INVALID_UNICHAR_ID) {
unicharset->set_other_case(unichar_id, other_case_id);
} else if (unichar_id >= SPECIAL_UNICHAR_CODES_COUNT && report_errors) {
tprintf("Other case %s of %s is not in unicharset\n",
other_case_uch.c_str(), unichar_str);
}
}
// Set RTL property and obtain mirror unichar ID from ICU.
std::vector<char32> mirrors(num_code_points, 0);
for (int i = 0; i < num_code_points; ++i) {
mirrors[i] = u_charMirror(uni_vector[i]);
if (i == 0) { // set directionality to that of the 1st code point
unicharset->set_direction(unichar_id,
static_cast<UNICHARSET::Direction>(
u_charDirection(uni_vector[i])));
}
}
std::string mirror_uch = UNICHAR::UTF32ToUTF8(mirrors);
UNICHAR_ID mirror_uch_id = unicharset->unichar_to_id(mirror_uch.c_str());
if (mirror_uch_id != INVALID_UNICHAR_ID) {
unicharset->set_mirror(unichar_id, mirror_uch_id);
} else if (report_errors) {
tprintf("Mirror %s of %s is not in unicharset\n",
mirror_uch.c_str(), unichar_str);
}
// Record normalized version of this unichar.
std::string normed_str;
if (unichar_id != 0 &&
tesseract::NormalizeUTF8String(
decompose ? tesseract::UnicodeNormMode::kNFKD
: tesseract::UnicodeNormMode::kNFKC,
tesseract::OCRNorm::kNormalize, tesseract::GraphemeNorm::kNone,
unichar_str, &normed_str) &&
!normed_str.empty()) {
unicharset->set_normed(unichar_id, normed_str.c_str());
} else {
unicharset->set_normed(unichar_id, unichar_str);
}
ASSERT_HOST(unicharset->get_other_case(unichar_id) < unicharset->size());
}
unicharset->post_load_setup();
}
