414 lines
18 KiB
C#
414 lines
18 KiB
C#
// Assets/Scripts/Localization/LocalizationManager.cs
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// 本地化管理器（运行时 JSON 文件驱动）。
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//
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// 数据格式（放在 Resources/Localization/{Language}/{TableName}.json）：
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// {
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// "entries": [
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// { "key": "ui_start", "value": "开始游戏" },
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// { "key": "ui_settings", "value": "设置" }
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// ]
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// }
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//
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// 推荐用法（通过 ServiceLocator 获取 ILocalizationService 实例）：
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// ServiceLocator.GetOrDefault<ILocalizationService>()?.Get("ui_start")
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// ServiceLocator.GetOrDefault<ILocalizationService>()?.SetLanguage(Language.English)
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//
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// 便捷静态方法（内部仍走 ServiceLocator，推荐在热路径之外使用）：
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// LocalizationManager.Get("ui_start")
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// LocalizationManager.Get("dlg_hero", LocalizationTable.Dialogue)
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// LocalizationManager.GetFormat("REWARD_GOLD", LocalizationTable.UI, 100)
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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using BaseGames.Core;
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using BaseGames.Core.Save;
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namespace BaseGames.Localization
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{
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/// <summary>
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/// 本地化管理器（MonoBehaviour，挂在 Persistent 场景）。
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/// 实现 ILocalizationService + ISaveable，通过 ServiceLocator 注册。
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/// 语言偏好持久化到 SaveData.Settings.Language，不使用 PlayerPrefs。
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/// </summary>
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public class LocalizationManager : MonoBehaviour, ILocalizationService, ISaveable
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{
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// 默认语言：回退链：当前语言 → 英语 → 直接返回 key
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private Language _currentLanguage = Language.ChineseSimplified;
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private readonly Language _fallbackLanguage = Language.English;
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// 双层缓存：(Language, tableName) 结构体键 → (key → value)
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// 使用值类型 CacheKey 代替字符串插值，消除每次 Get 调用的 string 堆分配。
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private readonly Dictionary<CacheKey, Dictionary<string, string>> _cache = new();
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// LanguageEventChannelSO：语言切换时向 SO 驱动的 UI 组件广播。
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// 在 Persistent 场景预制体的 Inspector 中拖入 EVT_LanguageChanged.asset。
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[SerializeField]
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[Tooltip("语言切换事件频道（EVT_LanguageChanged.asset）。切换语言时广播，订阅此频道的 UI 组件自动刷新文本。")]
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private LanguageEventChannelSO _languageEventChannel;
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// ILocalizationService 实例事件（C# 订阅，供不方便引用 SO 的组件使用）
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private event Action<Language> _onLanguageChanged;
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event Action<Language> ILocalizationService.OnLanguageChanged
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{
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add => _onLanguageChanged += value;
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remove => _onLanguageChanged -= value;
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}
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// ── 生命周期 ──────────────────────────────────────────────────────────
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private void Awake()
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{
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if (ServiceLocator.GetOrDefault<ILocalizationService>() != null) { Destroy(gameObject); return; }
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ServiceLocator.Register<ILocalizationService>(this);
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}
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private void OnEnable()
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{
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ServiceLocator.GetOrDefault<ISaveableRegistry>()?.Register(this);
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}
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private void OnDisable()
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{
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ServiceLocator.GetOrDefault<ISaveableRegistry>()?.Unregister(this);
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}
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private void OnDestroy()
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{
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ServiceLocator.Unregister<ILocalizationService>(this);
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}
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// ── ILocalizationService ──────────────────────────────────────────────
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public Language CurrentLanguage => _currentLanguage;
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/// <summary>切换游戏语言并通知所有订阅者刷新文本。</summary>
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public void SetLanguage(Language language)
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{
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if (_currentLanguage == language) return;
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_currentLanguage = language;
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_onLanguageChanged?.Invoke(language);
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_languageEventChannel?.Raise(language);
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// 同步到设置文件（ISettingsService 存储 locale code 字符串）
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ServiceLocator.GetOrDefault<ISettingsService>()?.SetLanguage(LanguageToLocaleCode(language));
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}
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/// <summary>将 Language 枚举转换为标准 locale code 字符串。</summary>
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public static string LanguageToLocaleCode(Language language) => language switch
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{
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Language.ChineseSimplified => "zh-CN",
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Language.Japanese => "ja-JP",
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Language.Korean => "ko-KR",
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Language.English => "en-US",
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_ => "en-US",
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};
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/// <summary>
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/// 获取本地化字符串（显式接口实现）。
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/// 查找顺序：当前语言 → 回退语言（English）→ 直接返回 key。
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/// </summary>
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string ILocalizationService.Get(string key, string table)
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{
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if (string.IsNullOrEmpty(key)) return string.Empty;
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// 1. 尝试当前语言
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if (TryGetFromTable(_currentLanguage, table, key, out string text))
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return text;
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// 2. 回退到 English
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if (_currentLanguage != _fallbackLanguage &&
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TryGetFromTable(_fallbackLanguage, table, key, out text))
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return text;
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// 3. 最终回退：原始 key
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return key;
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}
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/// <summary>
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/// 尝试获取本地化字符串（显式接口实现）。
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/// 返回 false 时 value 为 null，key 不会作为 value 返回。
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/// </summary>
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bool ILocalizationService.TryGet(string key, out string value, string table)
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{
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if (string.IsNullOrEmpty(key)) { value = null; return false; }
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if (TryGetFromTable(_currentLanguage, table, key, out value)) return true;
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if (_currentLanguage != _fallbackLanguage &&
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TryGetFromTable(_fallbackLanguage, table, key, out value)) return true;
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value = null;
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return false;
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}
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/// <summary>
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/// 获取带格式化参数的本地化字符串（显式接口实现）。
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/// 格式化失败时静默返回原始模板字符串。
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/// </summary>
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string ILocalizationService.GetFormat(string key, string table, params object[] args)
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{
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string template = ((ILocalizationService)this).Get(key, table);
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if (args == null || args.Length == 0) return template;
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try { return string.Format(template, args); }
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catch (Exception e)
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{
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#if UNITY_EDITOR || DEVELOPMENT_BUILD
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Debug.LogWarning($"[LocalizationManager] GetFormat '{key}' 格式化失败: {e.Message}");
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#else
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_ = e;
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#endif
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return template;
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}
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}
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/// <summary>
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/// 获取带数量的复数形式本地化字符串（显式接口实现）。
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/// 先查找 "{key}_one"（count==1）或 "{key}_other"（count≠1），找不到则回退到基础 key。
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/// 模板以 string.Format(template, count) 展开。
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/// </summary>
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string ILocalizationService.GetPlural(string key, int count, string table)
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{
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string pluralKey = count == 1 ? $"{key}_one" : $"{key}_other";
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if (TryGetFromTable(_currentLanguage, table, pluralKey, out string text) ||
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(_currentLanguage != _fallbackLanguage &&
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TryGetFromTable(_fallbackLanguage, table, pluralKey, out text)))
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{
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try { return string.Format(text, count); }
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catch { return text; }
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}
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// 回退到基础 key
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string baseText = ((ILocalizationService)this).Get(key, table);
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try { return string.Format(baseText, count); }
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catch { return baseText; }
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}
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/// <summary>
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/// 同步预热指定语言的所有已知本地化表，不阻塞检测已缓存表（显式接口实现）。
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/// </summary>
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void ILocalizationService.PreloadTables(Language language)
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{
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foreach (var table in LocalizationTable.All)
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{
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var ck = new CacheKey(language, table);
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if (_cache.ContainsKey(ck)) continue;
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var dict = LoadTable(language, table);
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#if UNITY_EDITOR || DEVELOPMENT_BUILD
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if (dict == null)
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Debug.LogWarning(
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$"[LocalizationManager] PreloadTables：{language}/{table} 未找到，" +
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$"请确认 Resources/Localization/{language}/{table}.json 存在。");
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#endif
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_cache[ck] = dict;
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}
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}
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/// <summary>
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/// 异步分帧预热：每帧加载一个表，不阻塞主线程（显式接口实现）。
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/// 建议在 Loading Screen 的协程中调用。
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/// </summary>
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void ILocalizationService.PreloadTablesAsync(Language language, Action onComplete)
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=> StartCoroutine(PreloadTablesRoutine(language, onComplete));
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private IEnumerator PreloadTablesRoutine(Language language, Action onComplete)
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{
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foreach (var table in LocalizationTable.All)
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{
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var ck = new CacheKey(language, table);
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if (_cache.ContainsKey(ck)) { yield return null; continue; }
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string path = $"Localization/{language}/{table}";
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var request = Resources.LoadAsync<TextAsset>(path);
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yield return request;
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var asset = request.asset as TextAsset;
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var dict = asset == null ? null : ParseTableText(asset.text);
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#if UNITY_EDITOR || DEVELOPMENT_BUILD
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if (dict == null)
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Debug.LogWarning(
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$"[LocalizationManager] PreloadTablesAsync：{language}/{table} 未找到，" +
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$"请确认 Resources/Localization/{language}/{table}.json 存在。");
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#endif
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_cache[ck] = dict;
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}
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onComplete?.Invoke();
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}
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// ── ISaveable ─────────────────────────────────────────────────────────
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public void OnSave(SaveData data)
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{
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if (data?.Settings == null) return;
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data.Settings.Language = _currentLanguage.ToString();
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}
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public void OnLoad(SaveData data)
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{
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if (data?.Settings == null || string.IsNullOrEmpty(data.Settings.Language)) return;
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if (Enum.TryParse<Language>(data.Settings.Language, out var lang))
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SetLanguage(lang);
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}
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// ── 静态便捷方法 ─────────────────────────────────────────────────────────
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/// <summary>
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/// 静态快捷获取本地化字符串。委托给 ILocalizationService 实例；服务未注册时直接返回 key。
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/// 表名建议使用 <see cref="LocalizationTable"/> 中的常量。
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/// </summary>
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public static string Get(string key, string table = LocalizationTable.UI)
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=> ServiceLocator.GetOrDefault<ILocalizationService>()?.Get(key, table) ?? key;
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/// <summary>
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/// 静态快捷尝试获取本地化字符串。服务未注册时返回 false。
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/// </summary>
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public static bool TryGet(string key, out string value, string table = LocalizationTable.UI)
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{
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var svc = ServiceLocator.GetOrDefault<ILocalizationService>();
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if (svc != null) return svc.TryGet(key, out value, table);
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value = null;
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return false;
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}
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/// <summary>
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/// 静态快捷获取带格式化参数的本地化字符串。
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/// 服务未注册时以 key 作为模板直接格式化后返回。
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/// </summary>
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public static string GetFormat(string key, string table, params object[] args)
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{
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var svc = ServiceLocator.GetOrDefault<ILocalizationService>();
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if (svc != null) return svc.GetFormat(key, table, args);
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if (args == null || args.Length == 0) return key;
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try { return string.Format(key, args); }
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catch { return key; }
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}
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/// <summary>
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/// 静态快捷获取带数量的复数形式本地化字符串。
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/// 服务未注册时直接返回 key。
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/// </summary>
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public static string GetPlural(string key, int count, string table = LocalizationTable.UI)
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=> ServiceLocator.GetOrDefault<ILocalizationService>()?.GetPlural(key, count, table) ?? key;
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// ── 编辑器预览（不依赖 ServiceLocator 实例）────────────────────────────
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#if UNITY_EDITOR
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// 编辑器预览缓存："{language}/{table}" → (key → value)
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// 生命周期与编辑器进程相同；域重载时自动清空（static 字段随域重载重置）。
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private static readonly Dictionary<string, Dictionary<string, string>> s_editorPreviewCache = new();
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/// <summary>
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/// 编辑器工具专用：不依赖运行时服务实例，直接从 Resources 读取本地化文本。
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/// 结果缓存在静态字典中，同一编辑器会话内同一表只加载一次。
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/// 找不到时返回 null（区别于运行时的 key 回退，便于调用方判断是否显示 key）。
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/// </summary>
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public static string GetEditorPreview(string key, string table = LocalizationTable.UI,
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Language language = Language.ChineseSimplified)
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{
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if (string.IsNullOrEmpty(key)) return null;
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var dict = GetEditorTable(language, table)
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?? GetEditorTable(Language.English, table);
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if (dict == null) return null;
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dict.TryGetValue(key, out var value);
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return value;
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}
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public static Dictionary<string, string> GetEditorTable(Language language, string table)
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{
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string cacheKey = $"{language}/{table}";
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if (s_editorPreviewCache.TryGetValue(cacheKey, out var cached))
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return cached;
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string path = $"Localization/{language}/{table}";
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var asset = Resources.Load<TextAsset>(path);
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var dict = asset == null ? null : ParseTableText(asset.text);
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s_editorPreviewCache[cacheKey] = dict;
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return dict;
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}
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/// <summary>编辑器工具：清除编辑器预览缓存（修改 JSON 文件后手动刷新时调用）。</summary>
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public static void ClearEditorPreviewCache() => s_editorPreviewCache.Clear();
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#endif
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// ── 内部缓存查找 ──────────────────────────────────────────────────────
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private bool TryGetFromTable(Language language, string table, string key, out string value)
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{
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var ck = new CacheKey(language, table);
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if (!_cache.TryGetValue(ck, out var dict))
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{
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dict = LoadTable(language, table);
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_cache[ck] = dict; // 即使加载失败也存入空字典，避免每帧重试
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}
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if (dict != null && dict.TryGetValue(key, out value)) return true;
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value = null;
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return false;
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}
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/// <summary>
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/// 从 Resources/Localization/{language}/{table}.json 加载字符串表。
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/// 返回 null 表示文件不存在。
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/// </summary>
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private static Dictionary<string, string> LoadTable(Language language, string table)
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{
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string path = $"Localization/{language}/{table}";
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var asset = Resources.Load<TextAsset>(path);
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return asset == null ? null : ParseTableText(asset.text);
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}
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/// <summary>
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/// 将 JSON 文本解析为 key→value 字典（内部共享解析逻辑）。
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/// 返回 null 表示格式无效。
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/// </summary>
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private static Dictionary<string, string> ParseTableText(string jsonText)
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{
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var parsed = JsonUtility.FromJson<StringTableJson>(jsonText);
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if (parsed?.entries == null) return null;
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var dict = new Dictionary<string, string>(parsed.entries.Count, StringComparer.Ordinal);
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foreach (var entry in parsed.entries)
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if (!string.IsNullOrEmpty(entry.key))
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dict[entry.key] = entry.value ?? string.Empty;
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return dict;
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}
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// ── 缓存键（值类型，消除字符串插值 GC）──────────────────────────────
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private readonly struct CacheKey : IEquatable<CacheKey>
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{
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private readonly Language _language;
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private readonly string _table;
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public CacheKey(Language language, string table)
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{
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_language = language;
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_table = table;
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}
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public bool Equals(CacheKey other)
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=> _language == other._language &&
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string.Equals(_table, other._table, StringComparison.Ordinal);
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public override bool Equals(object obj)
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=> obj is CacheKey other && Equals(other);
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public override int GetHashCode()
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=> HashCode.Combine((int)_language, _table);
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}
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// ── 序列化辅助类型 ────────────────────────────────────────────────────
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[Serializable]
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private class StringTableJson
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{
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public List<StringEntry> entries;
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}
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[Serializable]
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private class StringEntry
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{
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public string key;
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public string value;
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}
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}
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}
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