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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
// The WebIDL binder places static methods on the prototype, rather than
// on the constructor, which is a bit clumsy, and is definitely not
// idiomatic.
LanguageInfo.detectLanguage = LanguageInfo.prototype.detectLanguage;
// Closure is overzealous in its function call optimization, and tries
// to turn these singleton methods into unbound function calls.
ensureCache.alloc = ensureCache.alloc.bind(ensureCache);
ensureCache.prepare = ensureCache.prepare.bind(ensureCache);
// From public/encodings.h. Unfortunately, the WebIDL binder doesn't
// allow us to define or automatically derive these in the IDL.
var Encodings = {
"ISO_8859_1" : 0,
"ISO_8859_2" : 1,
"ISO_8859_3" : 2,
"ISO_8859_4" : 3,
"ISO_8859_5" : 4,
"ISO_8859_6" : 5,
"ISO_8859_7" : 6,
"ISO_8859_8" : 7,
"ISO_8859_9" : 8,
"ISO_8859_10" : 9,
"JAPANESE_EUC_JP" : 10,
"EUC_JP" : 10,
"JAPANESE_SHIFT_JIS" : 11,
"SHIFT_JIS" : 11,
"JAPANESE_JIS" : 12,
"JIS" : 12,
"CHINESE_BIG5" : 13,
"BIG5" : 13,
"CHINESE_GB" : 14,
"CHINESE_EUC_CN" : 15,
"EUC_CN" : 15,
"KOREAN_EUC_KR" : 16,
"EUC_KR" : 16,
"UNICODE_UNUSED" : 17,
"CHINESE_EUC_DEC" : 18,
"EUC_DEC" : 18,
"CHINESE_CNS" : 19,
"CNS" : 19,
"CHINESE_BIG5_CP950" : 20,
"BIG5_CP950" : 20,
"JAPANESE_CP932" : 21,
"CP932" : 21,
"UTF8" : 22,
"UNKNOWN_ENCODING" : 23,
"ASCII_7BIT" : 24,
"RUSSIAN_KOI8_R" : 25,
"KOI8_R" : 25,
"RUSSIAN_CP1251" : 26,
"CP1251" : 26,
"MSFT_CP1252" : 27,
"CP1252" : 27,
"RUSSIAN_KOI8_RU" : 28,
"KOI8_RU" : 28,
"MSFT_CP1250" : 29,
"CP1250" : 29,
"ISO_8859_15" : 30,
"MSFT_CP1254" : 31,
"CP1254" : 31,
"MSFT_CP1257" : 32,
"CP1257" : 32,
"ISO_8859_11" : 33,
"MSFT_CP874" : 34,
"CP874" : 34,
"MSFT_CP1256" : 35,
"CP1256" : 35,
"MSFT_CP1255" : 36,
"CP1255" : 36,
"ISO_8859_8_I" : 37,
"HEBREW_VISUAL" : 38,
"CZECH_CP852" : 39,
"CP852" : 39,
"CZECH_CSN_369103" : 40,
"CSN_369103" : 40,
"MSFT_CP1253" : 41,
"CP1253" : 41,
"RUSSIAN_CP866" : 42,
"CP866" : 42,
"ISO_8859_13" : 43,
"ISO_2022_KR" : 44,
"GBK" : 45,
"GB18030" : 46,
"BIG5_HKSCS" : 47,
"ISO_2022_CN" : 48,
"TSCII" : 49,
"TAMIL_MONO" : 50,
"TAMIL_BI" : 51,
"JAGRAN" : 52,
"MACINTOSH_ROMAN" : 53,
"UTF7" : 54,
"BHASKAR" : 55,
"HTCHANAKYA" : 56,
"UTF16BE" : 57,
"UTF16LE" : 58,
"UTF32BE" : 59,
"UTF32LE" : 60,
"BINARYENC" : 61,
"HZ_GB_2312" : 62,
"UTF8UTF8" : 63,
"TAM_ELANGO" : 64,
"TAM_LTTMBARANI" : 65,
"TAM_SHREE" : 66,
"TAM_TBOOMIS" : 67,
"TAM_TMNEWS" : 68,
"TAM_WEBTAMIL" : 69,
"KDDI_SHIFT_JIS" : 70,
"DOCOMO_SHIFT_JIS" : 71,
"SOFTBANK_SHIFT_JIS" : 72,
"KDDI_ISO_2022_JP" : 73,
"ISO_2022_JP" : 73,
"SOFTBANK_ISO_2022_JP" : 74,
};
// Accept forms both with and without underscores/hypens.
for (let code of Object.keys(Encodings)) {
if (code["includes"]("_"))
Encodings[code.replace(/_/g, "")] = Encodings[code];
}
addOnPreMain(function() {
onmessage = function(aMsg) {
let data = aMsg["data"];
let langInfo;
if (data["tld"] == undefined && data["encoding"] == undefined && data["language"] == undefined) {
langInfo = LanguageInfo.detectLanguage(data["text"], !data["isHTML"]);
} else {
// Do our best to find the given encoding in the encodings table.
// Otherwise, just fall back to unknown.
let enc = String(data["encoding"]).toUpperCase().replace(/[_-]/g, "");
let encoding;
if (Encodings.hasOwnProperty(enc))
encoding = Encodings[enc];
else
encoding = Encodings["UNKNOWN_ENCODING"];
langInfo = LanguageInfo.detectLanguage(data["text"], !data["isHTML"],
data["tld"] || null,
encoding,
data["language"] || null);
}
postMessage({
"language": langInfo.getLanguageCode(),
"confident": langInfo.getIsReliable(),
"languages": new Array(3).fill(0).map((_, index) => {
let lang = langInfo.get_languages(index);
return {
"languageCode": lang.getLanguageCode(),
"percent": lang.getPercent(),
};
}).filter(lang => {
// Ignore empty results.
return lang["languageCode"] != "un" || lang["percent"] > 0;
}),
});
Module.destroy(langInfo);
};
postMessage("ready");
});
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