fix: アクセント区間の数が選択インデックスを下回る可能性があるバグを修正 (#1575)

Co-authored-by: Hiroshiba <hihokaruta@gmail.com>

src/components/AudioDetail.vue

@@ -176,11 +176,11 @@ const hotkeyMap = new Map<HotkeyAction, () => HotkeyReturnType>([
       if (
         !uiLocked.value &&
         store.getters.ACTIVE_AUDIO_KEY &&
-        store.state.audioPlayStartPoint !== undefined
+        store.getters.AUDIO_PLAY_START_POINT !== undefined
       ) {
         store.dispatch("COMMAND_RESET_SELECTED_MORA_PITCH_AND_LENGTH", {
           audioKey: store.getters.ACTIVE_AUDIO_KEY,
-          accentPhraseIndex: store.state.audioPlayStartPoint,
+          accentPhraseIndex: store.getters.AUDIO_PLAY_START_POINT,
         });
       }
     },
@@ -221,7 +221,7 @@ const activePointScrollMode = computed(() => store.state.activePointScrollMode);
 // 再生開始アクセント句
 const startPoint = computed({
   get: () => {
-    return store.state.audioPlayStartPoint;
+    return store.getters.AUDIO_PLAY_START_POINT;
   },
   set: (startPoint) => {
     store.dispatch("SET_AUDIO_PLAY_START_POINT", { startPoint });

src/store/audio.ts

@@ -256,8 +256,6 @@ export const audioStoreState: AudioStoreState = {
   audioItems: {},
   audioKeys: [],
   audioStates: {},
-  // audio elementの再生オフセット
-  audioPlayStartPoint: undefined,
   nowPlayingContinuously: false,
 };
 
@@ -294,6 +292,29 @@ export const audioStore = createPartialStore<AudioStoreTypes>({
     },
   },
 
+  /**
+   * audio elementの再生オフセット。
+   * 選択+削除 や 挿入+選択+元に戻す などを行った場合でも範囲外にならないようにクランプする。
+   * ACTIVE_AUDIO_KEYがundefinedのときはundefinedを返す。
+   */
+  AUDIO_PLAY_START_POINT: {
+    getter(state, getters) {
+      const audioPlayStartPoint = state._audioPlayStartPoint;
+      if (
+        audioPlayStartPoint == undefined ||
+        getters.ACTIVE_AUDIO_KEY == undefined
+      ) {
+        return undefined;
+      }
+      const length =
+        state.audioItems[getters.ACTIVE_AUDIO_KEY].query?.accentPhrases.length;
+      if (length == undefined) {
+        return undefined;
+      }
+      return Math.max(0, Math.min(length - 1, audioPlayStartPoint));
+    },
+  },
+
   LOAD_CHARACTER: {
     action: createUILockAction(async ({ commit, dispatch }, { engineId }) => {
       const speakers = await dispatch("INSTANTIATE_ENGINE_CONNECTOR", {
@@ -538,7 +559,7 @@ export const audioStore = createPartialStore<AudioStoreTypes>({
 
   SET_AUDIO_PLAY_START_POINT: {
     mutation(state, { startPoint }: { startPoint?: number }) {
-      state.audioPlayStartPoint = startPoint;
+      state._audioPlayStartPoint = startPoint;
     },
     action({ commit }, { startPoint }: { startPoint?: number }) {
       commit("SET_AUDIO_PLAY_START_POINT", { startPoint });
@@ -1762,7 +1783,7 @@ export const audioStore = createPartialStore<AudioStoreTypes>({
   PLAY_AUDIO_BLOB: {
     action: createUILockAction(
       async (
-        { state, commit, dispatch },
+        { getters, commit, dispatch },
         { audioBlob, audioKey }: { audioBlob: Blob; audioKey?: AudioKey }
       ) => {
         commit("SET_AUDIO_SOURCE", { audioBlob });
@@ -1774,7 +1795,8 @@ export const audioStore = createPartialStore<AudioStoreTypes>({
           });
           if (accentPhraseOffsets.length === 0)
             throw new Error("accentPhraseOffsets.length === 0");
-          const startTime = accentPhraseOffsets[state.audioPlayStartPoint ?? 0];
+          const startTime =
+            accentPhraseOffsets[getters.AUDIO_PLAY_START_POINT ?? 0];
           if (startTime === undefined) throw Error("startTime === undefined");
           // 小さい値が切り捨てられることでフォーカスされるアクセントフレーズが一瞬元に戻るので、
           // 再生に影響のない程度かつ切り捨てられない値を加算する
@@ -1803,9 +1825,9 @@ export const audioStore = createPartialStore<AudioStoreTypes>({
   },
 
   PLAY_CONTINUOUSLY_AUDIO: {
-    action: createUILockAction(async ({ state, commit, dispatch }) => {
+    action: createUILockAction(async ({ state, getters, commit, dispatch }) => {
       const currentAudioKey = state._activeAudioKey;
-      const currentAudioPlayStartPoint = state.audioPlayStartPoint;
+      const currentAudioPlayStartPoint = getters.AUDIO_PLAY_START_POINT;
 
       let index = 0;
       if (currentAudioKey !== undefined) {

src/store/type.ts

@@ -130,7 +130,7 @@ export type AudioStoreState = {
   audioStates: Record<AudioKey, AudioState>;
   _activeAudioKey?: AudioKey;
   _selectedAudioKeys?: AudioKey[];
-  audioPlayStartPoint?: number;
+  _audioPlayStartPoint?: number;
   nowPlayingContinuously: boolean;
 };
 
@@ -151,6 +151,10 @@ export type AudioStoreTypes = {
     getter(audioKey: AudioKey): boolean;
   };
 
+  AUDIO_PLAY_START_POINT: {
+    getter: number | undefined;
+  };
+
   LOAD_CHARACTER: {
     action(payload: { engineId: EngineId }): void;
   };

tests/unit/store/Vuex.spec.ts

@@ -35,7 +35,6 @@ describe("store/vuex.js test", () => {
         audioItems: {},
         audioKeys: [],
         audioStates: {},
-        audioPlayStartPoint: 0,
         uiLockCount: 0,
         dialogLockCount: 0,
         reloadingLock: false,
@@ -209,7 +208,6 @@ describe("store/vuex.js test", () => {
     assert.isEmpty(store.state.audioKeys);
     assert.isObject(store.state.audioStates);
     assert.isEmpty(store.state.audioStates);
-    assert.equal(store.state.audioPlayStartPoint, 0);
     assert.equal(store.state.uiLockCount, 0);
     assert.equal(store.state.nowPlayingContinuously, false);
     assert.isArray(store.state.undoCommands);