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643 lines
20 KiB
643 lines
20 KiB
import 'package:flutter/material.dart';
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import 'package:get/get.dart';
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import 'dart:async';
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import 'dart:convert';
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import 'package:get_storage/get_storage.dart';
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import '../../../data/services/volcano_translation_service.dart';
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import '../../../data/services/azure_asr_service.dart';
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import '../../../data/services/azure_tts_service.dart';
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import '../../../data/services/language_manager.dart';
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import '../../../core/utils/logger.dart';
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class TranslationController extends GetxController {
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// 服务
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final AzureAsrService _asrService = Get.find<AzureAsrService>();
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final VolcanoTranslationService _translationService = Get.find<VolcanoTranslationService>();
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final AzureTtsService _ttsService = Get.find<AzureTtsService>();
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final LanguageManager _languageManager = Get.find<LanguageManager>();
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final GetStorage _storage = GetStorage();
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// 存储相关
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static const String _historyKey = 'translation_history';
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static const int _maxHistoryItems = 100;
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// 状态变量
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final isRecognizing = false.obs;
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final isTranslating = false.obs;
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final isTtsEnabled = true.obs;
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// 语言相关
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final sourceLanguage = '中文(简体)'.obs;
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final targetLanguage = '英语'.obs;
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final sourceLanguageCode = 'zh-CN'.obs;
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final targetLanguageCode = 'en-US'.obs;
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var detectedLanguageCode = '';
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// 翻译历史和当前项
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final translationHistory = <TranslationItem>[].obs;
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final Rx<TranslationItem?> currentItem = Rx<TranslationItem?>(null);
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String? currentSessionId;
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// UI相关
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final ScrollController scrollController = ScrollController();
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// 其他
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StreamSubscription? _recognitionSubscription;
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Timer? _translationDebounceTimer;
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Timer? _scrollDebounceTimer; // 滚动防抖定时器
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bool _isNearBottom = true; // 标记是否在底部附近
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// 获取支持的语言列表
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Map<String, String> get supportedLanguages => _languageManager.getChineseNameToAsrCodeMap();
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@override
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void onInit() {
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super.onInit();
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_initController();
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}
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// 初始化控制器
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void _initController() {
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_initLanguageCodes();
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loadTranslationHistory();
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_initServices();
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_setupListeners();
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// 初始化完成后滚动到底部
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WidgetsBinding.instance.addPostFrameCallback((_) {
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// 延迟 300ms 再次尝试滚动，确保列表已完全渲染
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Future.delayed(const Duration(milliseconds: 300), () {
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scrollToBottom(animate: false);
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});
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});
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}
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// 重新初始化控制器（公共方法）
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void reinitialize() {
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_setupListeners();
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// 初始化完成后滚动到底部
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WidgetsBinding.instance.addPostFrameCallback((_) {
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scrollToBottom(animate: false);
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});
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}
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// 仅设置滚动监听器（不启动翻译）
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void setupScrollListener() {
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// 移除之前的监听器，避免重复添加
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scrollController.removeListener(_onScroll);
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// 重新添加滚动监听器
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scrollController.addListener(_onScroll);
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}
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// 初始化服务
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Future<void> _initServices() async {
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await _initTranslationService();
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await _initAzureAsrService();
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}
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// 初始化语言代码
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void _initLanguageCodes() {
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final sourceAsrCode = _languageManager.getAsrCodeByChineseName(sourceLanguage.value);
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if (sourceAsrCode != null) {
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sourceLanguageCode.value = sourceAsrCode;
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}
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final targetAsrCode = _languageManager.getAsrCodeByChineseName(targetLanguage.value);
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if (targetAsrCode != null) {
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targetLanguageCode.value = targetAsrCode;
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}
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}
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// 初始化翻译服务
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Future<void> _initTranslationService() async {
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try {
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await _translationService.initialize();
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} catch (e) {
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Logger.error('初始化翻译服务失败: $e');
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}
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}
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// 初始化语音识别服务
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Future<void> _initAzureAsrService() async {
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try {
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final List<String> asrSupportedLanguages = [sourceLanguageCode.value, targetLanguageCode.value];
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await _ttsService.initialize();
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await _asrService.initialize(
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autoDetectLanguage: true,
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supportedLanguages: asrSupportedLanguages,
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);
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} catch (e) {
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Logger.error('初始化语音识别服务失败: $e');
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}
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}
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// 设置监听器
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void _setupListeners() {
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// 监听历史记录变化，当有新项添加时滚动到底部
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ever(translationHistory, (_) {
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if (_isNearBottom) {
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scrollToBottom();
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}
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});
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// 监听当前项变化，当有新项添加时滚动到底部
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ever(currentItem, (item) {
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if (item != null && _isNearBottom) {
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scrollToBottom();
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}
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});
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// 监听滚动位置，判断是否在底部附近
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scrollController.addListener(_onScroll);
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}
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// 滚动监听器
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void _onScroll() {
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if (!scrollController.hasClients) return;
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// 判断是否在底部附近（距离底部20像素内）
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final maxScroll = scrollController.position.maxScrollExtent;
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final currentScroll = scrollController.position.pixels;
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_isNearBottom = (maxScroll - currentScroll) < 20;
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}
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@override
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void onClose() {
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stopRecognition();
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_recognitionSubscription?.cancel();
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_translationDebounceTimer?.cancel();
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_scrollDebounceTimer?.cancel();
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scrollController.removeListener(_onScroll);
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scrollController.dispose();
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super.onClose();
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}
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// 更新ASR支持的语言
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Future<void> _updateAsrSupportedLanguages() async {
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try {
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final List<String> asrSupportedLanguages = [sourceLanguageCode.value, targetLanguageCode.value];
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await _asrService.setSupportedLanguages(asrSupportedLanguages);
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} catch (e) {
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Logger.error('更新ASR支持的语言失败: $e');
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}
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}
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// 切换TTS功能
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void toggleTts() => isTtsEnabled.toggle();
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// 开始语音识别
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Future<void> startRecognition() async {
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if (isRecognizing.value) return;
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try {
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await _updateAsrSupportedLanguages();
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currentSessionId = DateTime.now().millisecondsSinceEpoch.toString();
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// 初始化新的翻译项
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currentItem.value = TranslationItem(
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sourceText: '',
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translatedText: '',
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sourceLanguageCode: sourceLanguageCode.value,
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targetLanguageCode: targetLanguageCode.value,
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timestamp: DateTime.now(),
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sessionId: currentSessionId!,
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isFirstInSession: true,
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);
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// 开始连续语音识别
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final recognitionStream = await _asrService.startContinuousRecognition();
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isRecognizing.value = true;
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// 监听识别结果
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_recognitionSubscription?.cancel();
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_recognitionSubscription = recognitionStream.listen(_handleRecognitionEvent);
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} catch (e) {
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isRecognizing.value = false;
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Logger.error('启动语音识别失败: $e');
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}
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}
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// 处理识别事件
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void _handleRecognitionEvent(RecognitionEvent event) {
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if (event.type == RecognitionEventType.finalResult && event.text.isNotEmpty) {
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detectedLanguageCode = event.detectedLanguage;
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handleFinalResult(event.text);
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} else if (event.type == RecognitionEventType.intermediateResult && event.text.isNotEmpty) {
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if (event.detectedLanguage.isNotEmpty) {
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detectedLanguageCode = event.detectedLanguage;
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}
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handleIntermediateResult(event.text);
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} else if (event.type == RecognitionEventType.error) {
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isRecognizing.value = false;
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Logger.error('语音识别错误: ${event.error}');
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} else if (event.type == RecognitionEventType.canceled) {
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isRecognizing.value = false;
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Logger.error('语音识别取消: ${event.error}');
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}
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}
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// 停止语音识别
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Future<void> stopRecognition() async {
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if (!isRecognizing.value) return;
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try {
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await _asrService.stopContinuousRecognition();
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_recognitionSubscription?.cancel();
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_recognitionSubscription = null;
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isRecognizing.value = false;
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// 如果当前有中间结果，将其作为最终结果处理
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if (currentItem.value != null && currentItem.value!.sourceText.isNotEmpty) {
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// 标记为最终结果
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currentItem.value!.isIntermediate = false;
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// 如果还没有翻译结果，尝试翻译
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if (currentItem.value!.translatedText.isEmpty) {
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await translateText(currentItem.value!.sourceText);
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}
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translationHistory.add(currentItem.value!);
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saveTranslationHistory();
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}
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currentSessionId = null;
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currentItem.value = null;
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} catch (e) {
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Logger.error('停止语音识别失败: $e');
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}
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}
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// 处理中间识别结果
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void handleIntermediateResult(String text) {
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if (text.isEmpty) return;
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if (currentItem.value == null) {
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currentSessionId ??= DateTime.now().millisecondsSinceEpoch.toString();
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currentItem.value = TranslationItem(
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sourceText: text,
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translatedText: '',
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sourceLanguageCode: sourceLanguageCode.value,
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targetLanguageCode: targetLanguageCode.value,
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timestamp: DateTime.now(),
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sessionId: currentSessionId!,
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isFirstInSession: translationHistory.isEmpty || translationHistory.last.sessionId != currentSessionId,
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isIntermediate: true, // 保留标记，用于内部逻辑
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);
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} else {
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// 更新当前项
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currentItem.value!.sourceText = text;
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currentItem.value!.isIntermediate = true; // 保留标记，用于内部逻辑
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currentItem.refresh();
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}
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// 防抖处理翻译请求
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_translationDebounceTimer?.cancel();
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_translationDebounceTimer = Timer(const Duration(milliseconds: 300), () {
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translateCurrentItem(isIntermediate: true);
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});
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}
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// 翻译当前项
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Future<void> translateCurrentItem({bool isIntermediate = false}) async {
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if (currentItem.value == null || currentItem.value!.sourceText.isEmpty) return;
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await translateText(currentItem.value!.sourceText);
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}
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// 处理最终识别结果
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Future<void> handleFinalResult(String text) async {
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if (text.isEmpty || currentItem.value == null) return;
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// 更新当前项，但不立即添加到历史记录
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currentItem.value!.sourceText = text;
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currentItem.value!.isIntermediate = false; // 标记为最终结果
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currentItem.refresh();
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// 先翻译，保持UI稳定
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final translationResult = await translateText(text);
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// 给UI一点时间更新
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await Future.delayed(const Duration(milliseconds: 100));
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// 翻译完成后再添加到历史记录
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if (currentItem.value != null) {
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// 确保添加到历史记录的是最终结果
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translationHistory.add(currentItem.value!);
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saveTranslationHistory();
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// 播放TTS
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if (translationResult != null && isTtsEnabled.value) {
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await playTranslatedText(translationResult);
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}
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// 重置当前项，准备下一次输入
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currentItem.value = null;
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}
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}
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// 翻译文本
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Future<String?> translateText(String sourceText) async {
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if (sourceText.isEmpty) return null;
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isTranslating.value = true;
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String? translationResult;
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try {
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// 根据检测到的语言确定源语言和目标语言
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final bool shouldSwap = detectedLanguageCode == sourceLanguageCode.value;
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final detectedSourceLanguageCode = shouldSwap ? sourceLanguageCode.value : targetLanguageCode.value;
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final detectedTargetLanguageCode = shouldSwap ? targetLanguageCode.value : sourceLanguageCode.value;
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// 调用翻译服务
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translationResult = await _translationService.translateText(
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text: sourceText,
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sourceLanguageCode: detectedSourceLanguageCode,
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targetLanguageCode: detectedTargetLanguageCode,
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);
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if (translationResult != null) {
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_updateTranslationResult(sourceText, translationResult, detectedSourceLanguageCode, detectedTargetLanguageCode);
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}
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} catch (e) {
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Logger.error('翻译失败: $e');
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} finally {
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isTranslating.value = false;
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}
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return translationResult;
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}
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// 更新翻译结果
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void _updateTranslationResult(String sourceText, String result, String sourceCode, String targetCode) {
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if (currentItem.value != null && currentItem.value!.sourceText.contains(sourceText)) {
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// 更新当前项
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currentItem.value!.translatedText = result;
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currentItem.value!.sourceLanguageCode = sourceCode;
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currentItem.value!.targetLanguageCode = targetCode;
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currentItem.refresh();
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} else {
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// 更新历史记录
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final index = translationHistory.indexWhere((item) => item.sourceText == sourceText);
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if (index != -1) {
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translationHistory[index].translatedText = result;
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translationHistory[index].sourceLanguageCode = sourceCode;
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translationHistory[index].targetLanguageCode = targetCode;
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translationHistory.refresh();
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saveTranslationHistory();
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}
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}
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}
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// 播放翻译文本
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Future<void> playTranslatedText(String text) async {
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if (text.isEmpty) return;
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try {
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final bool shouldSwap = detectedLanguageCode == targetLanguageCode.value;
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final detectedTargetLanguageCode = shouldSwap ? sourceLanguageCode.value : targetLanguageCode.value;
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final voiceName = _languageManager.getTtsVoiceNameByAsrCode(detectedTargetLanguageCode) ?? 'en-US-AriaNeural';
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await _ttsService.setVoice(voiceName);
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await _ttsService.speak(text);
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} catch (e) {
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Logger.error('播放翻译失败: $e');
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}
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}
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// 停止所有操作
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Future<void> stopAll() async {
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try {
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if (isRecognizing.value) {
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await stopRecognition();
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}
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// 取消所有定时器
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_translationDebounceTimer?.cancel();
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_scrollDebounceTimer?.cancel();
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await _ttsService.stop();
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} catch (e) {
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Logger.error('停止操作失败: $e');
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}
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}
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// 播放特定翻译项
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Future<void> playTranslationItem(TranslationItem item) async {
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if (item.translatedText.isEmpty) return;
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try {
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final voiceName = _languageManager.getTtsVoiceNameByAsrCode(item.targetLanguageCode) ?? 'en-US-AriaNeural';
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await _ttsService.setVoice(voiceName);
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await _ttsService.speak(item.translatedText);
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} catch (e) {
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Logger.error('播放翻译项失败: $e');
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}
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}
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// 播放文本
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Future<void> playText(String text, {String? languageCode}) async {
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if (text.isEmpty) return;
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try {
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final voiceName = languageCode != null
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? _languageManager.getTtsVoiceNameByAsrCode(languageCode) ?? 'en-US-AriaNeural'
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: _languageManager.getTtsVoiceNameByAsrCode(targetLanguageCode.value) ?? 'en-US-AriaNeural';
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await _ttsService.setVoice(voiceName);
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await _ttsService.speak(text);
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} catch (e) {
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Logger.error('播放文本失败: $e');
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}
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}
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// 简洁高效的滚动到底部方法
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void scrollToBottom({bool animate = true}) {
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if (!scrollController.hasClients) return;
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// 取消之前的定时器
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_scrollDebounceTimer?.cancel();
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// 创建新的定时器，防抖处理
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_scrollDebounceTimer = Timer(const Duration(milliseconds: 100), () {
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if (!scrollController.hasClients) return;
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if (animate) {
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scrollController.animateTo(
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scrollController.position.maxScrollExtent,
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duration: const Duration(milliseconds: 200),
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curve: Curves.easeOut,
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);
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} else {
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scrollController.jumpTo(scrollController.position.maxScrollExtent);
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}
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});
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}
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// 底部控制栏高度
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double _bottomBarHeight = 0.0;
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// 设置底部控制栏高度
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void setBottomBarHeight(double height) {
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_bottomBarHeight = height;
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}
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// 获取底部控制栏高度
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double get bottomBarHeight => _bottomBarHeight;
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// 切换源语言和目标语言
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void swapLanguages() {
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// 先停止当前的翻译操作
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stopAll();
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final tempName = sourceLanguage.value;
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sourceLanguage.value = targetLanguage.value;
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targetLanguage.value = tempName;
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final tempCode = sourceLanguageCode.value;
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sourceLanguageCode.value = targetLanguageCode.value;
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targetLanguageCode.value = tempCode;
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}
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// 设置源语言
|
|
void setSourceLanguage(String language) {
|
|
if (sourceLanguage.value != language) {
|
|
// 先停止当前的翻译操作
|
|
stopAll();
|
|
|
|
sourceLanguage.value = language;
|
|
|
|
final asrCode = _languageManager.getAsrCodeByChineseName(language);
|
|
if (asrCode != null) {
|
|
sourceLanguageCode.value = asrCode;
|
|
}
|
|
|
|
_updateAsrSupportedLanguages();
|
|
|
|
if (isRecognizing.value) {
|
|
stopRecognition();
|
|
startRecognition();
|
|
}
|
|
}
|
|
}
|
|
|
|
// 设置目标语言
|
|
void setTargetLanguage(String language) {
|
|
if (targetLanguage.value != language) {
|
|
// 先停止当前的翻译操作
|
|
stopAll();
|
|
|
|
targetLanguage.value = language;
|
|
|
|
final asrCode = _languageManager.getAsrCodeByChineseName(language);
|
|
if (asrCode != null) {
|
|
targetLanguageCode.value = asrCode;
|
|
}
|
|
|
|
_updateAsrSupportedLanguages();
|
|
}
|
|
}
|
|
|
|
// 加载翻译历史
|
|
void loadTranslationHistory() {
|
|
final historyJson = _storage.read(_historyKey);
|
|
if (historyJson != null) {
|
|
try {
|
|
final List<dynamic> historyList = jsonDecode(historyJson);
|
|
translationHistory.value = historyList.map((item) => TranslationItem.fromJson(item)).toList();
|
|
} catch (e) {
|
|
_storage.remove(_historyKey);
|
|
Logger.error('加载翻译历史失败: $e');
|
|
}
|
|
}
|
|
}
|
|
|
|
// 保存翻译历史
|
|
void saveTranslationHistory() {
|
|
if (translationHistory.length > _maxHistoryItems) {
|
|
translationHistory.removeRange(0, translationHistory.length - _maxHistoryItems);
|
|
}
|
|
|
|
try {
|
|
final List<Map<String, dynamic>> historyJson = translationHistory.map((item) => item.toJson()).toList();
|
|
_storage.write(_historyKey, jsonEncode(historyJson));
|
|
} catch (e) {
|
|
Logger.error('保存翻译历史失败: $e');
|
|
}
|
|
}
|
|
|
|
// 清除翻译历史
|
|
void clearTranslationHistory() {
|
|
translationHistory.clear();
|
|
_storage.remove(_historyKey);
|
|
}
|
|
}
|
|
|
|
// 翻译项模型
|
|
class TranslationItem {
|
|
String sourceText;
|
|
String translatedText;
|
|
String sourceLanguageCode;
|
|
String targetLanguageCode;
|
|
final DateTime timestamp;
|
|
String sessionId;
|
|
final bool isFirstInSession;
|
|
bool isIntermediate; // 是否为中间结果
|
|
|
|
TranslationItem({
|
|
required this.sourceText,
|
|
required this.translatedText,
|
|
required this.sourceLanguageCode,
|
|
required this.targetLanguageCode,
|
|
required this.timestamp,
|
|
required this.sessionId,
|
|
this.isFirstInSession = false,
|
|
this.isIntermediate = false,
|
|
});
|
|
|
|
factory TranslationItem.fromJson(Map<String, dynamic> json) {
|
|
DateTime timestamp;
|
|
try {
|
|
timestamp = DateTime.parse(json['timestamp']);
|
|
} catch (e) {
|
|
timestamp = DateTime.now();
|
|
}
|
|
|
|
return TranslationItem(
|
|
sourceText: json['sourceText'] ?? '',
|
|
translatedText: json['translatedText'] ?? '',
|
|
sourceLanguageCode: json['sourceLanguageCode'] ?? 'zh-CN',
|
|
targetLanguageCode: json['targetLanguageCode'] ?? 'en-US',
|
|
timestamp: timestamp,
|
|
sessionId: json['sessionId'] ?? DateTime.now().millisecondsSinceEpoch.toString(),
|
|
isFirstInSession: json['isFirstInSession'] ?? false,
|
|
isIntermediate: false, // 从存储加载的都是最终结果
|
|
);
|
|
}
|
|
|
|
Map<String, dynamic> toJson() {
|
|
return {
|
|
'sourceText': sourceText,
|
|
'translatedText': translatedText,
|
|
'sourceLanguageCode': sourceLanguageCode,
|
|
'targetLanguageCode': targetLanguageCode,
|
|
'timestamp': timestamp.toIso8601String(),
|
|
'sessionId': sessionId,
|
|
'isFirstInSession': isFirstInSession,
|
|
// 不保存isIntermediate，因为存储的都是最终结果
|
|
};
|
|
}
|
|
|
|
// 获取源语言的中文名称
|
|
String get sourceLanguageName {
|
|
final languageManager = Get.find<LanguageManager>();
|
|
return languageManager.getChineseNameByAsrCode(sourceLanguageCode) ?? '未知语言';
|
|
}
|
|
|
|
// 获取目标语言的中文名称
|
|
String get targetLanguageName {
|
|
final languageManager = Get.find<LanguageManager>();
|
|
return languageManager.getChineseNameByAsrCode(targetLanguageCode) ?? '未知语言';
|
|
}
|
|
}
|
|
|