diff options
Diffstat (limited to 'ext/bg/js/japanese.js')
-rw-r--r-- | ext/bg/js/japanese.js | 705 |
1 files changed, 318 insertions, 387 deletions
diff --git a/ext/bg/js/japanese.js b/ext/bg/js/japanese.js index 3b37754d..2a2b39fd 100644 --- a/ext/bg/js/japanese.js +++ b/ext/bg/js/japanese.js @@ -17,442 +17,373 @@ */ /* global + * jp * wanakana */ -const JP_HALFWIDTH_KATAKANA_MAPPING = new Map([ - ['ヲ', 'ヲヺ-'], - ['ァ', 'ァ--'], - ['ィ', 'ィ--'], - ['ゥ', 'ゥ--'], - ['ェ', 'ェ--'], - ['ォ', 'ォ--'], - ['ャ', 'ャ--'], - ['ュ', 'ュ--'], - ['ョ', 'ョ--'], - ['ッ', 'ッ--'], - ['ー', 'ー--'], - ['ア', 'ア--'], - ['イ', 'イ--'], - ['ウ', 'ウヴ-'], - ['エ', 'エ--'], - ['オ', 'オ--'], - ['カ', 'カガ-'], - ['キ', 'キギ-'], - ['ク', 'クグ-'], - ['ケ', 'ケゲ-'], - ['コ', 'コゴ-'], - ['サ', 'サザ-'], - ['シ', 'シジ-'], - ['ス', 'スズ-'], - ['セ', 'セゼ-'], - ['ソ', 'ソゾ-'], - ['タ', 'タダ-'], - ['チ', 'チヂ-'], - ['ツ', 'ツヅ-'], - ['テ', 'テデ-'], - ['ト', 'トド-'], - ['ナ', 'ナ--'], - ['ニ', 'ニ--'], - ['ヌ', 'ヌ--'], - ['ネ', 'ネ--'], - ['ノ', 'ノ--'], - ['ハ', 'ハバパ'], - ['ヒ', 'ヒビピ'], - ['フ', 'フブプ'], - ['ヘ', 'ヘベペ'], - ['ホ', 'ホボポ'], - ['マ', 'マ--'], - ['ミ', 'ミ--'], - ['ム', 'ム--'], - ['メ', 'メ--'], - ['モ', 'モ--'], - ['ヤ', 'ヤ--'], - ['ユ', 'ユ--'], - ['ヨ', 'ヨ--'], - ['ラ', 'ラ--'], - ['リ', 'リ--'], - ['ル', 'ル--'], - ['レ', 'レ--'], - ['ロ', 'ロ--'], - ['ワ', 'ワ--'], - ['ン', 'ン--'] -]); - -const JP_HIRAGANA_RANGE = [0x3040, 0x309f]; -const JP_KATAKANA_RANGE = [0x30a0, 0x30ff]; -const JP_KANA_RANGES = [JP_HIRAGANA_RANGE, JP_KATAKANA_RANGE]; - -const JP_CJK_COMMON_RANGE = [0x4e00, 0x9fff]; -const JP_CJK_RARE_RANGE = [0x3400, 0x4dbf]; -const JP_CJK_RANGES = [JP_CJK_COMMON_RANGE, JP_CJK_RARE_RANGE]; - -const JP_ITERATION_MARK_CHAR_CODE = 0x3005; - -// Japanese character ranges, roughly ordered in order of expected frequency -const JP_JAPANESE_RANGES = [ - JP_HIRAGANA_RANGE, - JP_KATAKANA_RANGE, - - JP_CJK_COMMON_RANGE, - JP_CJK_RARE_RANGE, - - [0xff66, 0xff9f], // Halfwidth katakana - - [0x30fb, 0x30fc], // Katakana punctuation - [0xff61, 0xff65], // Kana punctuation - [0x3000, 0x303f], // CJK punctuation - - [0xff10, 0xff19], // Fullwidth numbers - [0xff21, 0xff3a], // Fullwidth upper case Latin letters - [0xff41, 0xff5a], // Fullwidth lower case Latin letters - - [0xff01, 0xff0f], // Fullwidth punctuation 1 - [0xff1a, 0xff1f], // Fullwidth punctuation 2 - [0xff3b, 0xff3f], // Fullwidth punctuation 3 - [0xff5b, 0xff60], // Fullwidth punctuation 4 - [0xffe0, 0xffee] // Currency markers -]; - - -// Helper functions - -function _jpIsCodePointInRanges(codePoint, ranges) { - for (const [min, max] of ranges) { - if (codePoint >= min && codePoint <= max) { - return true; +(() => { + const HALFWIDTH_KATAKANA_MAPPING = new Map([ + ['ヲ', 'ヲヺ-'], + ['ァ', 'ァ--'], + ['ィ', 'ィ--'], + ['ゥ', 'ゥ--'], + ['ェ', 'ェ--'], + ['ォ', 'ォ--'], + ['ャ', 'ャ--'], + ['ュ', 'ュ--'], + ['ョ', 'ョ--'], + ['ッ', 'ッ--'], + ['ー', 'ー--'], + ['ア', 'ア--'], + ['イ', 'イ--'], + ['ウ', 'ウヴ-'], + ['エ', 'エ--'], + ['オ', 'オ--'], + ['カ', 'カガ-'], + ['キ', 'キギ-'], + ['ク', 'クグ-'], + ['ケ', 'ケゲ-'], + ['コ', 'コゴ-'], + ['サ', 'サザ-'], + ['シ', 'シジ-'], + ['ス', 'スズ-'], + ['セ', 'セゼ-'], + ['ソ', 'ソゾ-'], + ['タ', 'タダ-'], + ['チ', 'チヂ-'], + ['ツ', 'ツヅ-'], + ['テ', 'テデ-'], + ['ト', 'トド-'], + ['ナ', 'ナ--'], + ['ニ', 'ニ--'], + ['ヌ', 'ヌ--'], + ['ネ', 'ネ--'], + ['ノ', 'ノ--'], + ['ハ', 'ハバパ'], + ['ヒ', 'ヒビピ'], + ['フ', 'フブプ'], + ['ヘ', 'ヘベペ'], + ['ホ', 'ホボポ'], + ['マ', 'マ--'], + ['ミ', 'ミ--'], + ['ム', 'ム--'], + ['メ', 'メ--'], + ['モ', 'モ--'], + ['ヤ', 'ヤ--'], + ['ユ', 'ユ--'], + ['ヨ', 'ヨ--'], + ['ラ', 'ラ--'], + ['リ', 'リ--'], + ['ル', 'ル--'], + ['レ', 'レ--'], + ['ロ', 'ロ--'], + ['ワ', 'ワ--'], + ['ン', 'ン--'] + ]); + + const ITERATION_MARK_CODE_POINT = 0x3005; + + + // Existing functions + + const isCodePointKanji = jp.isCodePointKanji; + const isStringEntirelyKana = jp.isStringEntirelyKana; + + + // Conversion functions + + function convertKatakanaToHiragana(text) { + let result = ''; + for (const c of text) { + if (wanakana.isKatakana(c)) { + result += wanakana.toHiragana(c); + } else { + result += c; + } } - } - return false; -} - - -// Character code testing functions -function jpIsCodePointKanji(codePoint) { - return _jpIsCodePointInRanges(codePoint, JP_CJK_RANGES); -} - -function jpIsCodePointKana(codePoint) { - return _jpIsCodePointInRanges(codePoint, JP_KANA_RANGES); -} + return result; + } -function jpIsCodePointJapanese(codePoint) { - return _jpIsCodePointInRanges(codePoint, JP_JAPANESE_RANGES); -} + function convertHiraganaToKatakana(text) { + let result = ''; + for (const c of text) { + if (wanakana.isHiragana(c)) { + result += wanakana.toKatakana(c); + } else { + result += c; + } + } + return result; + } -// String testing functions + function convertToRomaji(text) { + return wanakana.toRomaji(text); + } -function jpIsStringEntirelyKana(str) { - if (str.length === 0) { return false; } - for (const c of str) { - if (!jpIsCodePointKana(c.codePointAt(0))) { - return false; + function convertReading(expressionFragment, readingFragment, readingMode) { + switch (readingMode) { + case 'hiragana': + return convertKatakanaToHiragana(readingFragment || ''); + case 'katakana': + return convertHiraganaToKatakana(readingFragment || ''); + case 'romaji': + if (readingFragment) { + return convertToRomaji(readingFragment); + } else { + if (isStringEntirelyKana(expressionFragment)) { + return convertToRomaji(expressionFragment); + } + } + return readingFragment; + case 'none': + return null; + default: + return readingFragment; } } - return true; -} - -function jpIsStringPartiallyJapanese(str) { - if (str.length === 0) { return false; } - for (const c of str) { - if (jpIsCodePointJapanese(c.codePointAt(0))) { - return true; + + function convertNumericToFullWidth(text) { + let result = ''; + for (const char of text) { + let c = char.codePointAt(0); + if (c >= 0x30 && c <= 0x39) { // ['0', '9'] + c += 0xff10 - 0x30; // 0xff10 = '0' full width + result += String.fromCodePoint(c); + } else { + result += char; + } } + return result; } - return false; -} + function convertHalfWidthKanaToFullWidth(text, sourceMap=null) { + let result = ''; + + // This function is safe to use charCodeAt instead of codePointAt, since all + // the relevant characters are represented with a single UTF-16 character code. + for (let i = 0, ii = text.length; i < ii; ++i) { + const c = text[i]; + const mapping = HALFWIDTH_KATAKANA_MAPPING.get(c); + if (typeof mapping !== 'string') { + result += c; + continue; + } -// Conversion functions - -function jpKatakanaToHiragana(text) { - let result = ''; - for (const c of text) { - if (wanakana.isKatakana(c)) { - result += wanakana.toHiragana(c); - } else { - result += c; - } - } + let index = 0; + switch (text.charCodeAt(i + 1)) { + case 0xff9e: // dakuten + index = 1; + break; + case 0xff9f: // handakuten + index = 2; + break; + } - return result; -} + let c2 = mapping[index]; + if (index > 0) { + if (c2 === '-') { // invalid + index = 0; + c2 = mapping[0]; + } else { + ++i; + } + } -function jpHiraganaToKatakana(text) { - let result = ''; - for (const c of text) { - if (wanakana.isHiragana(c)) { - result += wanakana.toKatakana(c); - } else { - result += c; + if (sourceMap !== null && index > 0) { + sourceMap.combine(result.length, 1); + } + result += c2; } + + return result; } - return result; -} - -function jpToRomaji(text) { - return wanakana.toRomaji(text); -} - -function jpConvertReading(expressionFragment, readingFragment, readingMode) { - switch (readingMode) { - case 'hiragana': - return jpKatakanaToHiragana(readingFragment || ''); - case 'katakana': - return jpHiraganaToKatakana(readingFragment || ''); - case 'romaji': - if (readingFragment) { - return jpToRomaji(readingFragment); + function convertAlphabeticToKana(text, sourceMap=null) { + let part = ''; + let result = ''; + + for (const char of text) { + // Note: 0x61 is the character code for 'a' + let c = char.codePointAt(0); + if (c >= 0x41 && c <= 0x5a) { // ['A', 'Z'] + c += (0x61 - 0x41); + } else if (c >= 0x61 && c <= 0x7a) { // ['a', 'z'] + // NOP; c += (0x61 - 0x61); + } else if (c >= 0xff21 && c <= 0xff3a) { // ['A', 'Z'] fullwidth + c += (0x61 - 0xff21); + } else if (c >= 0xff41 && c <= 0xff5a) { // ['a', 'z'] fullwidth + c += (0x61 - 0xff41); + } else if (c === 0x2d || c === 0xff0d) { // '-' or fullwidth dash + c = 0x2d; // '-' } else { - if (jpIsStringEntirelyKana(expressionFragment)) { - return jpToRomaji(expressionFragment); + if (part.length > 0) { + result += convertAlphabeticPartToKana(part, sourceMap, result.length); + part = ''; } + result += char; + continue; } - return readingFragment; - case 'none': - return null; - default: - return readingFragment; - } -} - -function jpDistributeFurigana(expression, reading) { - const fallback = [{furigana: reading, text: expression}]; - if (!reading) { - return fallback; - } + part += String.fromCodePoint(c); + } - let isAmbiguous = false; - const segmentize = (reading2, groups) => { - if (groups.length === 0 || isAmbiguous) { - return []; + if (part.length > 0) { + result += convertAlphabeticPartToKana(part, sourceMap, result.length); } + return result; + } - const group = groups[0]; - if (group.mode === 'kana') { - if (jpKatakanaToHiragana(reading2).startsWith(jpKatakanaToHiragana(group.text))) { - const readingLeft = reading2.substring(group.text.length); - const segs = segmentize(readingLeft, groups.splice(1)); - if (segs) { - return [{text: group.text}].concat(segs); - } - } - } else { - let foundSegments = null; - for (let i = reading2.length; i >= group.text.length; --i) { - const readingUsed = reading2.substring(0, i); - const readingLeft = reading2.substring(i); - const segs = segmentize(readingLeft, groups.slice(1)); - if (segs) { - if (foundSegments !== null) { - // more than one way to segmentize the tail, mark as ambiguous - isAmbiguous = true; - return null; + function convertAlphabeticPartToKana(text, sourceMap, sourceMapStart) { + const result = wanakana.toHiragana(text); + + // Generate source mapping + if (sourceMap !== null) { + let i = 0; + let resultPos = 0; + const ii = text.length; + while (i < ii) { + // Find smallest matching substring + let iNext = i + 1; + let resultPosNext = result.length; + while (iNext < ii) { + const t = wanakana.toHiragana(text.substring(0, iNext)); + if (t === result.substring(0, t.length)) { + resultPosNext = t.length; + break; } - foundSegments = [{text: group.text, furigana: readingUsed}].concat(segs); + ++iNext; } - // there is only one way to segmentize the last non-kana group - if (groups.length === 1) { - break; + + // Merge characters + const removals = iNext - i - 1; + if (removals > 0) { + sourceMap.combine(sourceMapStart, removals); + } + ++sourceMapStart; + + // Empty elements + const additions = resultPosNext - resultPos - 1; + for (let j = 0; j < additions; ++j) { + sourceMap.insert(sourceMapStart, 0); + ++sourceMapStart; } + + i = iNext; + resultPos = resultPosNext; } - return foundSegments; - } - }; - - const groups = []; - let modePrev = null; - for (const c of expression) { - const codePoint = c.codePointAt(0); - const modeCurr = jpIsCodePointKanji(codePoint) || codePoint === JP_ITERATION_MARK_CHAR_CODE ? 'kanji' : 'kana'; - if (modeCurr === modePrev) { - groups[groups.length - 1].text += c; - } else { - groups.push({mode: modeCurr, text: c}); - modePrev = modeCurr; } - } - const segments = segmentize(reading, groups); - if (segments && !isAmbiguous) { - return segments; - } - return fallback; -} - -function jpDistributeFuriganaInflected(expression, reading, source) { - const output = []; - - let stemLength = 0; - const shortest = Math.min(source.length, expression.length); - const sourceHiragana = jpKatakanaToHiragana(source); - const expressionHiragana = jpKatakanaToHiragana(expression); - while (stemLength < shortest && sourceHiragana[stemLength] === expressionHiragana[stemLength]) { - ++stemLength; - } - const offset = source.length - stemLength; - - const stemExpression = source.substring(0, source.length - offset); - const stemReading = reading.substring( - 0, - offset === 0 ? reading.length : reading.length - expression.length + stemLength - ); - for (const segment of jpDistributeFurigana(stemExpression, stemReading)) { - output.push(segment); + return result; } - if (stemLength !== source.length) { - output.push({text: source.substring(stemLength)}); - } - return output; -} - -function jpConvertHalfWidthKanaToFullWidth(text, sourceMapping) { - let result = ''; - const hasSourceMapping = Array.isArray(sourceMapping); - - // This function is safe to use charCodeAt instead of codePointAt, since all - // the relevant characters are represented with a single UTF-16 character code. - for (let i = 0, ii = text.length; i < ii; ++i) { - const c = text[i]; - const mapping = JP_HALFWIDTH_KATAKANA_MAPPING.get(c); - if (typeof mapping !== 'string') { - result += c; - continue; - } + // Furigana distribution - let index = 0; - switch (text.charCodeAt(i + 1)) { - case 0xff9e: // dakuten - index = 1; - break; - case 0xff9f: // handakuten - index = 2; - break; + function distributeFurigana(expression, reading) { + const fallback = [{furigana: reading, text: expression}]; + if (!reading) { + return fallback; } - let c2 = mapping[index]; - if (index > 0) { - if (c2 === '-') { // invalid - index = 0; - c2 = mapping[0]; - } else { - ++i; + let isAmbiguous = false; + const segmentize = (reading2, groups) => { + if (groups.length === 0 || isAmbiguous) { + return []; } - } - if (hasSourceMapping && index > 0) { - index = result.length; - const v = sourceMapping.splice(index + 1, 1)[0]; - sourceMapping[index] += v; + const group = groups[0]; + if (group.mode === 'kana') { + if (convertKatakanaToHiragana(reading2).startsWith(convertKatakanaToHiragana(group.text))) { + const readingLeft = reading2.substring(group.text.length); + const segs = segmentize(readingLeft, groups.splice(1)); + if (segs) { + return [{text: group.text}].concat(segs); + } + } + } else { + let foundSegments = null; + for (let i = reading2.length; i >= group.text.length; --i) { + const readingUsed = reading2.substring(0, i); + const readingLeft = reading2.substring(i); + const segs = segmentize(readingLeft, groups.slice(1)); + if (segs) { + if (foundSegments !== null) { + // more than one way to segmentize the tail, mark as ambiguous + isAmbiguous = true; + return null; + } + foundSegments = [{text: group.text, furigana: readingUsed}].concat(segs); + } + // there is only one way to segmentize the last non-kana group + if (groups.length === 1) { + break; + } + } + return foundSegments; + } + }; + + const groups = []; + let modePrev = null; + for (const c of expression) { + const codePoint = c.codePointAt(0); + const modeCurr = isCodePointKanji(codePoint) || codePoint === ITERATION_MARK_CODE_POINT ? 'kanji' : 'kana'; + if (modeCurr === modePrev) { + groups[groups.length - 1].text += c; + } else { + groups.push({mode: modeCurr, text: c}); + modePrev = modeCurr; + } } - result += c2; - } - return result; -} - -function jpConvertNumericTofullWidth(text) { - let result = ''; - for (const char of text) { - let c = char.codePointAt(0); - if (c >= 0x30 && c <= 0x39) { // ['0', '9'] - c += 0xff10 - 0x30; // 0xff10 = '0' full width - result += String.fromCodePoint(c); - } else { - result += char; + const segments = segmentize(reading, groups); + if (segments && !isAmbiguous) { + return segments; } + return fallback; } - return result; -} -function jpConvertAlphabeticToKana(text, sourceMapping) { - let part = ''; - let result = ''; - const ii = text.length; + function distributeFuriganaInflected(expression, reading, source) { + const output = []; - if (sourceMapping.length === ii) { - sourceMapping.length = ii; - sourceMapping.fill(1); - } + let stemLength = 0; + const shortest = Math.min(source.length, expression.length); + const sourceHiragana = convertKatakanaToHiragana(source); + const expressionHiragana = convertKatakanaToHiragana(expression); + while (stemLength < shortest && sourceHiragana[stemLength] === expressionHiragana[stemLength]) { + ++stemLength; + } + const offset = source.length - stemLength; + + const stemExpression = source.substring(0, source.length - offset); + const stemReading = reading.substring( + 0, + offset === 0 ? reading.length : reading.length - expression.length + stemLength + ); + for (const segment of distributeFurigana(stemExpression, stemReading)) { + output.push(segment); + } - for (const char of text) { - // Note: 0x61 is the character code for 'a' - let c = char.codePointAt(0); - if (c >= 0x41 && c <= 0x5a) { // ['A', 'Z'] - c += (0x61 - 0x41); - } else if (c >= 0x61 && c <= 0x7a) { // ['a', 'z'] - // NOP; c += (0x61 - 0x61); - } else if (c >= 0xff21 && c <= 0xff3a) { // ['A', 'Z'] fullwidth - c += (0x61 - 0xff21); - } else if (c >= 0xff41 && c <= 0xff5a) { // ['a', 'z'] fullwidth - c += (0x61 - 0xff41); - } else if (c === 0x2d || c === 0xff0d) { // '-' or fullwidth dash - c = 0x2d; // '-' - } else { - if (part.length > 0) { - result += jpToHiragana(part, sourceMapping, result.length); - part = ''; - } - result += char; - continue; + if (stemLength !== source.length) { + output.push({text: source.substring(stemLength)}); } - part += String.fromCodePoint(c); - } - if (part.length > 0) { - result += jpToHiragana(part, sourceMapping, result.length); + return output; } - return result; -} - -function jpToHiragana(text, sourceMapping, sourceMappingStart) { - const result = wanakana.toHiragana(text); - - // Generate source mapping - if (Array.isArray(sourceMapping)) { - if (typeof sourceMappingStart !== 'number') { sourceMappingStart = 0; } - let i = 0; - let resultPos = 0; - const ii = text.length; - while (i < ii) { - // Find smallest matching substring - let iNext = i + 1; - let resultPosNext = result.length; - while (iNext < ii) { - const t = wanakana.toHiragana(text.substring(0, iNext)); - if (t === result.substring(0, t.length)) { - resultPosNext = t.length; - break; - } - ++iNext; - } - - // Merge characters - const removals = iNext - i - 1; - if (removals > 0) { - let sum = 0; - const vs = sourceMapping.splice(sourceMappingStart + 1, removals); - for (const v of vs) { sum += v; } - sourceMapping[sourceMappingStart] += sum; - } - ++sourceMappingStart; - // Empty elements - const additions = resultPosNext - resultPos - 1; - for (let j = 0; j < additions; ++j) { - sourceMapping.splice(sourceMappingStart, 0, 0); - ++sourceMappingStart; - } - - i = iNext; - resultPos = resultPosNext; - } - } - return result; -} + // Exports + + Object.assign(jp, { + convertKatakanaToHiragana, + convertHiraganaToKatakana, + convertToRomaji, + convertReading, + convertNumericToFullWidth, + convertHalfWidthKanaToFullWidth, + convertAlphabeticToKana, + distributeFurigana, + distributeFuriganaInflected + }); +})(); |