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using System;
using System.Collections;
using System.Collections.Generic;
using System.Reflection;
using UnityEditor;
using UnityEngine;
#if ODIN_INSPECTOR
using Sirenix.OdinInspector.Editor;
#endif
namespace XNodeEditor.Internal {
/// <summary> Handles caching of custom editor classes and their target types. Accessible with GetEditor(Type type) </summary>
/// <typeparam name="T">Editor Type. Should be the type of the deriving script itself (eg. NodeEditor) </typeparam>
/// <typeparam name="A">Attribute Type. The attribute used to connect with the runtime type (eg. CustomNodeEditorAttribute) </typeparam>
/// <typeparam name="K">Runtime Type. The ScriptableObject this can be an editor for (eg. Node) </typeparam>
public abstract class NodeEditorBase<T, A, K> where A : Attribute, NodeEditorBase<T, A, K>.INodeEditorAttrib where T : NodeEditorBase<T, A, K> where K : ScriptableObject {
/// <summary> Custom editors defined with [CustomNodeEditor] </summary>
private static Dictionary<Type, Type> editorTypes;
private static Dictionary<K, T> editors = new Dictionary<K, T>();
public NodeEditorWindow window;
public K target;
public SerializedObject serializedObject;
#if ODIN_INSPECTOR
private PropertyTree _objectTree;
public PropertyTree objectTree {
get {
if (this._objectTree == null) {
try {
bool wasInEditor = NodeEditor.inNodeEditor;
NodeEditor.inNodeEditor = true;
this._objectTree = PropertyTree.Create(this.serializedObject);
NodeEditor.inNodeEditor = wasInEditor;
} catch (ArgumentException ex) {
Debug.Log(ex);
}
}
return this._objectTree;
}
}
#endif
public static T GetEditor(K target, NodeEditorWindow window) {
if (target == null) return null;
T editor;
if (!editors.TryGetValue(target, out editor)) {
Type type = target.GetType();
Type editorType = GetEditorType(type);
editor = Activator.CreateInstance(editorType) as T;
editor.target = target;
editor.serializedObject = new SerializedObject(target);
editor.window = window;
editor.OnCreate();
editors.Add(target, editor);
}
if (editor.target == null) editor.target = target;
if (editor.window != window) editor.window = window;
if (editor.serializedObject == null) editor.serializedObject = new SerializedObject(target);
return editor;
}
private static Type GetEditorType(Type type) {
if (type == null) return null;
if (editorTypes == null) CacheCustomEditors();
Type result;
if (editorTypes.TryGetValue(type, out result)) return result;
//If type isn't found, try base type
return GetEditorType(type.BaseType);
}
private static void CacheCustomEditors() {
editorTypes = new Dictionary<Type, Type>();
//Get all classes deriving from NodeEditor via reflection
Type[] nodeEditors = typeof(T).GetDerivedTypes();
for (int i = 0; i < nodeEditors.Length; i++) {
if (nodeEditors[i].IsAbstract) continue;
var attribs = nodeEditors[i].GetCustomAttributes(typeof(A), false);
if (attribs == null || attribs.Length == 0) continue;
A attrib = attribs[0] as A;
editorTypes.Add(attrib.GetInspectedType(), nodeEditors[i]);
}
}
/// <summary> Called on creation, after references have been set </summary>
public virtual void OnCreate() { }
public interface INodeEditorAttrib {
Type GetInspectedType();
}
}
}
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