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