98 lines
2.2 KiB
C++
98 lines
2.2 KiB
C++
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#include "ThaiCharacter.h"
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#include <Utf8.h>
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namespace ThaiShaper {
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ThaiCharType getThaiCharType(uint32_t cp) {
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// Not in Thai block
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if (cp < 0x0E00 || cp > 0x0E7F) {
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return ThaiCharType::NON_THAI;
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}
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// Thai consonants: ก-ฮ (U+0E01-U+0E2E)
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// Note: U+0E2F (ฯ) is PAIYANNOI, a punctuation mark
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if (cp >= 0x0E01 && cp <= 0x0E2E) {
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return ThaiCharType::CONSONANT;
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}
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// Leading vowels: เ แ โ ไ ใ (U+0E40-U+0E44)
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if (cp >= 0x0E40 && cp <= 0x0E44) {
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return ThaiCharType::LEADING_VOWEL;
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}
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// Above vowels and marks
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switch (cp) {
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case 0x0E31: // MAI HAN-AKAT (ั)
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case 0x0E34: // SARA I (ิ)
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case 0x0E35: // SARA II (ี)
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case 0x0E36: // SARA UE (ึ)
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case 0x0E37: // SARA UEE (ื)
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case 0x0E47: // MAITAIKHU (็)
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return ThaiCharType::ABOVE_VOWEL;
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}
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// Below vowels
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switch (cp) {
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case 0x0E38: // SARA U (ุ)
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case 0x0E39: // SARA UU (ู)
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case 0x0E3A: // PHINTHU (ฺ)
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return ThaiCharType::BELOW_VOWEL;
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}
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// Tone marks
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switch (cp) {
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case 0x0E48: // MAI EK (่)
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case 0x0E49: // MAI THO (้)
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case 0x0E4A: // MAI TRI (๊)
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case 0x0E4B: // MAI CHATTAWA (๋)
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return ThaiCharType::TONE_MARK;
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}
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// Follow vowels (vowels that display after consonant)
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switch (cp) {
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case 0x0E30: // SARA A (ะ)
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case 0x0E32: // SARA AA (า)
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case 0x0E33: // SARA AM (ำ)
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case 0x0E45: // LAKKHANGYAO (ๅ)
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return ThaiCharType::FOLLOW_VOWEL;
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}
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// Nikhahit
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if (cp == 0x0E4D) {
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return ThaiCharType::NIKHAHIT;
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}
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// Yamakkan / Thanthakhat
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if (cp == 0x0E4C || cp == 0x0E4E) {
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return ThaiCharType::YAMAKKAN;
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}
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// Thai digits: ๐-๙ (U+0E50-U+0E59)
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if (cp >= 0x0E50 && cp <= 0x0E59) {
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return ThaiCharType::THAI_DIGIT;
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}
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// Everything else in Thai block is a symbol/punctuation
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return ThaiCharType::THAI_SYMBOL;
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}
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bool containsThai(const char* text) {
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if (text == nullptr || *text == '\0') {
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return false;
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}
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const uint8_t* ptr = reinterpret_cast<const uint8_t*>(text);
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uint32_t cp;
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while ((cp = utf8NextCodepoint(&ptr))) {
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if (isThaiCodepoint(cp)) {
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return true;
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}
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}
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return false;
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}
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} // namespace ThaiShaper
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