redglow
90 lines
3.1 KiB
C#
90 lines
3.1 KiB
C#
using System;
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using System.Collections.Concurrent;
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using System.Diagnostics.CodeAnalysis;
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using System.Linq;
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using System.Reflection;
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using Godot;
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namespace GodotHostTest.addons.godot_di;
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/// <summary>
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/// Taken from https://github.com/godotengine/godot-proposals/issues/12294
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/// </summary>
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public static class GodotScriptPathCache
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{
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private static readonly ConcurrentDictionary<Type, string> TypeToPath = new();
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private static readonly ConcurrentDictionary<string, Type> PathToType = new();
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private static readonly Type GodotObject = typeof(GodotObject);
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private static readonly Type ScriptPathAttribute = typeof(ScriptPathAttribute);
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private static AssemblyLoadEventHandler? _assemblyLoadEventHandler;
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private static void InitializeIfNeeded()
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{
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if (_assemblyLoadEventHandler != null) return;
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Initialize();
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System.Runtime.Loader.AssemblyLoadContext.GetLoadContext(Assembly.GetExecutingAssembly())!
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.Unloading += _ => { Deinitialize(); };
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}
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private static void Initialize()
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{
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GD.Print($"Initializing {nameof(GodotScriptPathCache)}");
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TypeToPath.Clear();
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PathToType.Clear();
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_assemblyLoadEventHandler = (sender, args) => CacheScriptsInAssembly(args.LoadedAssembly);
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AppDomain.CurrentDomain.AssemblyLoad += _assemblyLoadEventHandler;
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foreach (var assembly in AppDomain.CurrentDomain.GetAssemblies())
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CacheScriptsInAssembly(assembly);
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return;
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void CacheScriptsInAssembly(Assembly assembly)
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{
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foreach (var type in assembly.GetTypes()
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.Where(t => t.IsClass)
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.Where(t => t.IsSubclassOf(GodotObject)))
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// get script path attribute
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if (type.GetCustomAttributes(ScriptPathAttribute, false).FirstOrDefault() is ScriptPathAttribute
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scriptPath)
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{
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TypeToPath[type] = scriptPath.Path;
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PathToType[scriptPath.Path] = type;
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}
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}
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}
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private static void Deinitialize()
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{
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GD.Print($"Deinitializing {nameof(GodotScriptPathCache)}");
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AppDomain.CurrentDomain.AssemblyLoad -= _assemblyLoadEventHandler;
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_assemblyLoadEventHandler = null;
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TypeToPath.Clear();
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PathToType.Clear();
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}
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public static bool TryGetScriptPath(Type type, [MaybeNullWhen(false)] out string path)
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{
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InitializeIfNeeded();
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return TypeToPath.TryGetValue(type, out path);
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}
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public static Script GetScriptFromType(Type type)
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{
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InitializeIfNeeded();
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return TryGetScriptPath(type, out string path)
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? GD.Load<Script>(path)
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: throw new InvalidOperationException("Script path not found in cache.");
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}
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public static Script GetScriptFromType<T>()
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{
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InitializeIfNeeded();
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return GetScriptFromType(typeof(T));
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}
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public static bool TryGetTypeFromPath(string path, [MaybeNullWhen(false)] out Type type)
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{
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InitializeIfNeeded();
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return PathToType.TryGetValue(path, out type);
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}
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} |