feat: added i18n support; added Simplified Chinese support

src/i18n/percussion.ts

@@ -0,0 +1,32 @@
+import type { InstrumentType } from '../core/track/KGMidiTrack';
+import { midiPercussionKeyMap } from '../util/midiUtil';
+import type { TranslationParams } from './types';
+
+type TranslateFn = (key: string, params?: TranslationParams) => string;
+
+const GM_DRUM_KIT_INSTRUMENTS: ReadonlySet<InstrumentType> = new Set([
+  'standard',
+  'orchestra_kit',
+]);
+
+export function isGmDrumKitInstrument(instrument: InstrumentType): boolean {
+  return GM_DRUM_KIT_INSTRUMENTS.has(instrument);
+}
+
+export function getPercussionKeyShortLabel(pitch: number, t: TranslateFn): string | null {
+  const drumInfo = midiPercussionKeyMap[pitch];
+  if (!drumInfo) {
+    return null;
+  }
+
+  return t(`percussion.short.${pitch}`) || drumInfo.shortName;
+}
+
+export function getPercussionKeyFullLabel(pitch: number, t: TranslateFn): string | null {
+  const drumInfo = midiPercussionKeyMap[pitch];
+  if (!drumInfo) {
+    return null;
+  }
+
+  return t(`percussion.full.${pitch}`) || drumInfo.fullName;
+}