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-rw-r--r--ext/bg/js/japanese.js40
1 files changed, 39 insertions, 1 deletions
diff --git a/ext/bg/js/japanese.js b/ext/bg/js/japanese.js
index 5c49cca7..5fef27a7 100644
--- a/ext/bg/js/japanese.js
+++ b/ext/bg/js/japanese.js
@@ -82,6 +82,9 @@
const ITERATION_MARK_CODE_POINT = 0x3005;
+ const HIRAGANA_SMALL_TSU_CODE_POINT = 0x3063;
+ const KATAKANA_SMALL_TSU_CODE_POINT = 0x30c3;
+ const KANA_PROLONGED_SOUND_MARK_CODE_POINT = 0x30fc;
// Existing functions
@@ -372,6 +375,40 @@
}
+ // Miscellaneous
+
+ function collapseEmphaticSequences(text, fullCollapse, sourceMap=null) {
+ let result = '';
+ let collapseCodePoint = -1;
+ const hasSourceMap = (sourceMap !== null);
+ for (const char of text) {
+ const c = char.codePointAt(0);
+ if (
+ c === HIRAGANA_SMALL_TSU_CODE_POINT ||
+ c === KATAKANA_SMALL_TSU_CODE_POINT ||
+ c === KANA_PROLONGED_SOUND_MARK_CODE_POINT
+ ) {
+ if (collapseCodePoint !== c) {
+ collapseCodePoint = c;
+ if (!fullCollapse) {
+ result += char;
+ continue;
+ }
+ }
+ } else {
+ collapseCodePoint = -1;
+ result += char;
+ continue;
+ }
+
+ if (hasSourceMap) {
+ sourceMap.combine(Math.max(0, result.length - 1), 1);
+ }
+ }
+ return result;
+ }
+
+
// Exports
Object.assign(jp, {
@@ -383,6 +420,7 @@
convertHalfWidthKanaToFullWidth,
convertAlphabeticToKana,
distributeFurigana,
- distributeFuriganaInflected
+ distributeFuriganaInflected,
+ collapseEmphaticSequences
});
})();