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using UnityEngine;
using UnityEditor;
using System;
using System.Linq;
using System.Reflection;

public class UnityReflectionHelper : EditorWindow
{
    [MenuItem("Window/Reflection/Helper")]
    static void Init ()
    {
        var w = GetWindow <UnityReflectionHelper> ();
        w.Show ();
    }
        
    string _result = "";
    string _className = "";
    string _name = "";
    string _assemblyName;
    Vector2 _scrollPos = Vector2.zero;
    string[] _ignoreNames = null;
    /// <summary>
    /// Private Field or Method
    /// </summary>
    bool _isPrivate = false;

    void OnGUI ()
    {
        GUI.skin.textArea.richText = true;
        EditorGUILayout.LabelField (_name);
        _isPrivate = EditorGUILayout.ToggleLeft ("Private", _isPrivate);
        GUILayout.BeginHorizontal ();
        _assemblyName = EditorGUILayout.TextField (_assemblyName);
        _className = EditorGUILayout.TextField (_className);
        GUILayout.EndHorizontal ();

        GUILayout.BeginHorizontal ();
        if (GUILayout.Button ("Find Methods"))
            FindMethods ();
        if (GUILayout.Button ("Find Fields"))
            FindFields ();
        GUILayout.EndHorizontal ();

        _scrollPos = GUILayout.BeginScrollView (_scrollPos);
        GUILayout.TextArea (_result);
        GUILayout.EndScrollView ();
    }

    void SetupIgnoreMethod ()
    {
        var t = Type.GetType ("UnityEngine.Object,UnityEngine");
        _ignoreNames = t.GetMethods ().Select (x => x.Name).ToArray ();
    }

    void SetupIgnoreFields ()
    {
        var t = Type.GetType ("UnityEngine.Object,UnityEngine");
        _ignoreNames = t.GetFields ().Select (x => x.Name).ToArray ();
    }

    void FindMethods ()
    {
        SetupIgnoreMethod ();

        _result = "";
        _name = _assemblyName + "." + _className;
        var t = Type.GetType (_name + "," + _assemblyName);
        if (t != null)
        {
            var methods = _isPrivate ? t.GetMethods (BindingFlags.NonPublic | BindingFlags.Instance) : t.GetMethods ();
            foreach(var m in methods)
            {
                bool isStatic = m.IsStatic;
                string pre = isStatic ? "[S] " : "  ";
                var element = pre + m.Name + "\n";
                if (_result.Contains (element) == false && _ignoreNames.Any (x=>x == m.Name) == false){
                    _result += element;
                } 
            }
        }
        else
        {
            Fail (_name);
        }
    }


    void FindFields ()
    {
        SetupIgnoreFields ();

        _result = "";
        // フルパス,アセンブリ名
        _name = _assemblyName + "." + _className;
        var t = Type.GetType (_name + "," + _assemblyName);
        if (t != null)
        {
            var fields = _isPrivate ? t.GetFields (BindingFlags.NonPublic | BindingFlags.Instance) : t.GetFields ();
            foreach(var m in fields)
            {
                bool isStatic = m.IsStatic;
                string pre = isStatic ? "[S] " : "  ";
                var element = pre + m.Name + "\n";
                if (_result.Contains (element) == false && _ignoreNames.Any (x=>x == m.Name) == false){
                    _result += element;
                } 
            }
        }
        else
        {
            Fail (_name);
        }
    }

    string CreateMethodName (MethodInfo m)
    {
        if (m.IsPrivate) {
            return string.Format ("<color=yellow>{0}</color>", m.Name);
        }
        return m.Name;
    }

    void Fail (string name)
    {
        ShowNotification (new GUIContent("\""+ name + "\"\nis Fail"));
    }
}