Implement action manager.

Assets/Cryville/Crtr/Browsing/Actions.meta

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Assets/Cryville/Crtr/Browsing/Actions/ActionManager.cs

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+using System;
+using System.Collections.Generic;
+
+namespace Cryville.Crtr.Browsing.Actions {
+	public class ActionManager {
+		readonly Dictionary<Type, List<IResourceAction>> _actions = new Dictionary<Type, List<IResourceAction>>();
+
+		class ActionPriorityComparer : IComparer<IResourceAction> {
+			public static readonly ActionPriorityComparer Instance = new ActionPriorityComparer();
+			public int Compare(IResourceAction x, IResourceAction y) {
+				return x.Priority.CompareTo(y.Priority);
+			}
+		}
+
+		void Register(Type type, IResourceAction action) {
+			List<IResourceAction> actions;
+			if (!_actions.TryGetValue(type, out actions)) {
+				_actions.Add(type, actions = new List<IResourceAction>());
+			}
+			int index = actions.BinarySearch(action, ActionPriorityComparer.Instance);
+			if (index < 0) index = ~index;
+			actions.Insert(index, action);
+		}
+		public void Register(IResourceAction action) {
+			Register(typeof(object), action);
+		}
+		public void Register<T>(IResourceAction<T> action) {
+			Register(typeof(T), action);
+		}
+
+		public void Unregister(Type type, IResourceAction action) {
+			List<IResourceAction> actions;
+			if (!_actions.TryGetValue(type, out actions)) return;
+			actions.Remove(action);
+		}
+		public void Unregister(IResourceAction action) {
+			Unregister(typeof(object), action);
+		}
+		public void Unregister<T>(IResourceAction<T> action) {
+			Unregister(typeof(T), action);
+		}
+
+		public IReadOnlyCollection<IResourceAction> GetActions(Type type) {
+			return _actions[type];
+		}
+	}
+}

Assets/Cryville/Crtr/Browsing/Actions/ActionManager.cs.meta

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