137 lines
5.9 KiB
C#
137 lines
5.9 KiB
C#
using System;
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using UnityEngine;
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using UnityEngine.InputSystem;
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using BaseGames.Core;
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using BaseGames.Core.Events;
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using BaseGames.Input;
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namespace BaseGames.UI
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{
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/// <summary>
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/// 按键图标服务实现。
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///
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/// 职责：
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/// 1. 侦听 InputDeviceTypeEventChannelSO，更新当前图标集
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/// 2. 侦听 InputSystem.onActionChange（BoundControlsChanged），改键后刷新
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/// 3. 提供 GetActionIcon / GetActionEffectivePath，供 UI 查询
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/// 4. 在 Awake 注册自身到 ServiceLocator
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///
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/// 布置方式：与 InputDeviceDetector 同挂在 UIRoot 上；每场景只需一个实例。
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/// </summary>
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public sealed class InputIconService : MonoBehaviour, IInputIconService
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{
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[Header("Input")]
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[SerializeField] private InputReaderSO _inputReader;
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[Header("Icon Sets — 按设备类型配置")]
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[SerializeField] private InputDeviceIconSetSO _kbMouseSet;
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[SerializeField] private InputDeviceIconSetSO _xboxSet;
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[SerializeField] private InputDeviceIconSetSO _playStationSet;
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[SerializeField] private InputDeviceIconSetSO _switchSet;
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[Header("Event Channels")]
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[SerializeField] private InputDeviceTypeEventChannelSO _onDeviceChanged;
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// ── IInputIconService ─────────────────────────────────────────────────
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public InputDeviceType CurrentDevice { get; private set; } = InputDeviceType.KeyboardMouse;
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public event Action OnIconSetChanged;
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private InputDeviceIconSetSO _activeSet;
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private readonly CompositeDisposable _subs = new();
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// ── Lifecycle ─────────────────────────────────────────────────────────
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private void Awake()
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{
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_activeSet = _kbMouseSet;
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}
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private void OnEnable()
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{
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// OnEnable/OnDisable 对称注册：支持多场景加载时 GameObject 的启用/禁用周期
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ServiceLocator.RegisterIfAbsent<IInputIconService>(this);
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_onDeviceChanged?.Subscribe(HandleDeviceChanged).AddTo(_subs);
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InputSystem.onActionChange += HandleActionChange;
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}
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private void OnDisable()
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{
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ServiceLocator.Unregister<IInputIconService>(this); // 仅注销自身（ReferenceEquals 保护）
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_subs.Clear();
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InputSystem.onActionChange -= HandleActionChange;
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}
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// ── Event Handlers ────────────────────────────────────────────────────
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private void HandleDeviceChanged(InputDeviceType deviceType)
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{
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CurrentDevice = deviceType;
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_activeSet = deviceType switch
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{
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InputDeviceType.XboxController => _xboxSet ?? _kbMouseSet,
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InputDeviceType.PlayStationController => _playStationSet ?? _kbMouseSet,
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InputDeviceType.SwitchController => _switchSet ?? _kbMouseSet,
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_ => _kbMouseSet,
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};
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OnIconSetChanged?.Invoke();
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}
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private void HandleActionChange(object obj, InputActionChange change)
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{
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if (change == InputActionChange.BoundControlsChanged)
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OnIconSetChanged?.Invoke();
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}
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// ── IInputIconService impl ────────────────────────────────────────────
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public Sprite GetActionIcon(string actionName)
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{
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var path = GetActionEffectivePath(actionName);
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if (path == null || _activeSet == null) return null;
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return _activeSet.GetIcon(path);
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}
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public Sprite GetPathIcon(string bindingPath)
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{
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if (_activeSet == null || string.IsNullOrEmpty(bindingPath)) return null;
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return _activeSet.GetIcon(bindingPath);
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}
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public string GetActionEffectivePath(string actionName)
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{
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if (_inputReader == null) return null;
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var action = _inputReader.FindAction(actionName);
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if (action == null) return null;
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// 通过 binding.groups 过滤，只返回匹配当前设备控制方案的绑定路径
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string schemeFilter = GetControlSchemeForDevice(CurrentDevice);
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foreach (var binding in action.bindings)
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{
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// 跳过复合绑定的父条目（无实际路径）
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if (binding.isComposite) continue;
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// 若 binding.groups 不含当前方案，则跳过（允许空 groups 的绑定匹配所有设备）
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if (!string.IsNullOrEmpty(schemeFilter)
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&& !string.IsNullOrEmpty(binding.groups)
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&& !binding.groups.Contains(schemeFilter, StringComparison.OrdinalIgnoreCase))
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continue;
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// effectivePath 已自动合并 overridePath（改键后的路径）
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var path = binding.effectivePath;
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if (!string.IsNullOrEmpty(path)) return path;
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}
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return null;
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}
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// ── Helpers ───────────────────────────────────────────────────────────
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/// <summary>将设备类型映射到 InputActionAsset 中配置的控制方案名称。</summary>
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private static string GetControlSchemeForDevice(InputDeviceType device) => device switch
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{
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InputDeviceType.KeyboardMouse => "Keyboard&Mouse",
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_ => "Gamepad", // Xbox / PS / Switch 共用 Gamepad 方案
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};
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}
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}
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