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import unicode from 'unicode-properties';
// This maps the Unicode Script property to an OpenType script tag
// Data from http://www.microsoft.com/typography/otspec/scripttags.htm
// and http://www.unicode.org/Public/UNIDATA/PropertyValueAliases.txt.
const UNICODE_SCRIPTS = {
Caucasian_Albanian: 'aghb',
Arabic: 'arab',
Imperial_Aramaic: 'armi',
Armenian: 'armn',
Avestan: 'avst',
Balinese: 'bali',
Bamum: 'bamu',
Bassa_Vah: 'bass',
Batak: 'batk',
Bengali: ['bng2', 'beng'],
Bopomofo: 'bopo',
Brahmi: 'brah',
Braille: 'brai',
Buginese: 'bugi',
Buhid: 'buhd',
Chakma: 'cakm',
Canadian_Aboriginal: 'cans',
Carian: 'cari',
Cham: 'cham',
Cherokee: 'cher',
Coptic: 'copt',
Cypriot: 'cprt',
Cyrillic: 'cyrl',
Devanagari: ['dev2', 'deva'],
Deseret: 'dsrt',
Duployan: 'dupl',
Egyptian_Hieroglyphs: 'egyp',
Elbasan: 'elba',
Ethiopic: 'ethi',
Georgian: 'geor',
Glagolitic: 'glag',
Gothic: 'goth',
Grantha: 'gran',
Greek: 'grek',
Gujarati: ['gjr2', 'gujr'],
Gurmukhi: ['gur2', 'guru'],
Hangul: 'hang',
Han: 'hani',
Hanunoo: 'hano',
Hebrew: 'hebr',
Hiragana: 'hira',
Pahawh_Hmong: 'hmng',
Katakana_Or_Hiragana: 'hrkt',
Old_Italic: 'ital',
Javanese: 'java',
Kayah_Li: 'kali',
Katakana: 'kana',
Kharoshthi: 'khar',
Khmer: 'khmr',
Khojki: 'khoj',
Kannada: ['knd2', 'knda'],
Kaithi: 'kthi',
Tai_Tham: 'lana',
Lao: 'lao ',
Latin: 'latn',
Lepcha: 'lepc',
Limbu: 'limb',
Linear_A: 'lina',
Linear_B: 'linb',
Lisu: 'lisu',
Lycian: 'lyci',
Lydian: 'lydi',
Mahajani: 'mahj',
Mandaic: 'mand',
Manichaean: 'mani',
Mende_Kikakui: 'mend',
Meroitic_Cursive: 'merc',
Meroitic_Hieroglyphs: 'mero',
Malayalam: ['mlm2', 'mlym'],
Modi: 'modi',
Mongolian: 'mong',
Mro: 'mroo',
Meetei_Mayek: 'mtei',
Myanmar: ['mym2', 'mymr'],
Old_North_Arabian: 'narb',
Nabataean: 'nbat',
Nko: 'nko ',
Ogham: 'ogam',
Ol_Chiki: 'olck',
Old_Turkic: 'orkh',
Oriya: ['ory2', 'orya'],
Osmanya: 'osma',
Palmyrene: 'palm',
Pau_Cin_Hau: 'pauc',
Old_Permic: 'perm',
Phags_Pa: 'phag',
Inscriptional_Pahlavi: 'phli',
Psalter_Pahlavi: 'phlp',
Phoenician: 'phnx',
Miao: 'plrd',
Inscriptional_Parthian: 'prti',
Rejang: 'rjng',
Runic: 'runr',
Samaritan: 'samr',
Old_South_Arabian: 'sarb',
Saurashtra: 'saur',
Shavian: 'shaw',
Sharada: 'shrd',
Siddham: 'sidd',
Khudawadi: 'sind',
Sinhala: 'sinh',
Sora_Sompeng: 'sora',
Sundanese: 'sund',
Syloti_Nagri: 'sylo',
Syriac: 'syrc',
Tagbanwa: 'tagb',
Takri: 'takr',
Tai_Le: 'tale',
New_Tai_Lue: 'talu',
Tamil: ['tml2', 'taml'],
Tai_Viet: 'tavt',
Telugu: ['tel2', 'telu'],
Tifinagh: 'tfng',
Tagalog: 'tglg',
Thaana: 'thaa',
Thai: 'thai',
Tibetan: 'tibt',
Tirhuta: 'tirh',
Ugaritic: 'ugar',
Vai: 'vai ',
Warang_Citi: 'wara',
Old_Persian: 'xpeo',
Cuneiform: 'xsux',
Yi: 'yi ',
Inherited: 'zinh',
Common: 'zyyy',
Unknown: 'zzzz'
};
const OPENTYPE_SCRIPTS = {};
for (let script in UNICODE_SCRIPTS) {
let tag = UNICODE_SCRIPTS[script];
if (Array.isArray(tag)) {
for (let t of tag) {
OPENTYPE_SCRIPTS[t] = script;
}
} else {
OPENTYPE_SCRIPTS[tag] = script;
}
}
export function fromUnicode(script) {
return UNICODE_SCRIPTS[script];
}
export function fromOpenType(tag) {
return OPENTYPE_SCRIPTS[tag];
}
export function forString(string) {
let len = string.length;
let idx = 0;
while (idx < len) {
let code = string.charCodeAt(idx++);
// Check if this is a high surrogate
if (0xd800 <= code && code <= 0xdbff && idx < len) {
let next = string.charCodeAt(idx);
// Check if this is a low surrogate
if (0xdc00 <= next && next <= 0xdfff) {
idx++;
code = ((code & 0x3FF) << 10) + (next & 0x3FF) + 0x10000;
}
}
let script = unicode.getScript(code);
if (script !== 'Common' && script !== 'Inherited' && script !== 'Unknown') {
return UNICODE_SCRIPTS[script];
}
}
return UNICODE_SCRIPTS.Unknown;
}
export function forCodePoints(codePoints) {
for (let i = 0; i < codePoints.length; i++) {
let codePoint = codePoints[i];
let script = unicode.getScript(codePoint);
if (script !== 'Common' && script !== 'Inherited' && script !== 'Unknown') {
return UNICODE_SCRIPTS[script];
}
}
return UNICODE_SCRIPTS.Unknown;
}
// The scripts in this map are written from right to left
const RTL = {
arab: true, // Arabic
hebr: true, // Hebrew
syrc: true, // Syriac
thaa: true, // Thaana
cprt: true, // Cypriot Syllabary
khar: true, // Kharosthi
phnx: true, // Phoenician
'nko ': true, // N'Ko
lydi: true, // Lydian
avst: true, // Avestan
armi: true, // Imperial Aramaic
phli: true, // Inscriptional Pahlavi
prti: true, // Inscriptional Parthian
sarb: true, // Old South Arabian
orkh: true, // Old Turkic, Orkhon Runic
samr: true, // Samaritan
mand: true, // Mandaic, Mandaean
merc: true, // Meroitic Cursive
mero: true, // Meroitic Hieroglyphs
// Unicode 7.0 (not listed on http://www.microsoft.com/typography/otspec/scripttags.htm)
mani: true, // Manichaean
mend: true, // Mende Kikakui
nbat: true, // Nabataean
narb: true, // Old North Arabian
palm: true, // Palmyrene
phlp: true // Psalter Pahlavi
};
export function direction(script) {
if (RTL[script]) {
return 'rtl';
}
return 'ltr';
}