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using UnityEngine;
using System.Collections.Generic;
#if UNITY_EDITOR
using UnityEditor;
namespace Lean.Common.Examples
{
[CanEditMultipleObjects]
[CustomEditor(typeof(LeanMarker))]
public class LeanMarker_Inspector : LeanInspector<LeanMarker>
{
protected override void DrawInspector()
{
BeginError(Any(t => t.Target == null));
Draw("target");
EndError();
}
}
}
#endif
namespace Lean.Common.Examples
{
/// <summary>This component marks the Target object using the current GameObject name.
/// This allows you to quickly find and access it from anywhere using the LeanMarker.Reference component.</summary>
[ExecuteInEditMode]
[DisallowMultipleComponent]
[AddComponentMenu("Lean/Common/Lean Marker")]
public class LeanMarker : MonoBehaviour
{
/// <summary>This struct can be added to your custom components, allowing you to quickly find and efficiently access a marked GameObject.</summary>
public class Reference<T>
where T : Object
{
public Reference(string newName)
{
if (string.IsNullOrEmpty(newName) == true)
{
throw new System.ArgumentException("Cannot reference a null or empty marker!");
}
name = newName;
}
protected string name;
protected bool cached;
protected T instance;
public T Instance
{
get
{
if (cached == false)
{
Find();
}
return instance;
}
}
protected virtual void Build(LeanMarker marker)
{
if (typeof(T) == typeof(GameObject))
{
if (marker.target != null)
{
if (marker.target is GameObject)
{
instance = (T)marker.target; return;
}
else if (marker.target is Component)
{
instance = (T)(Object)((Component)marker.target).gameObject; return;
}
}
else
{
instance = (T)(Object)marker.gameObject; return;
}
}
else if (typeof(T).IsSubclassOf(typeof(Component)))
{
if (marker.target != null)
{
if (marker.target is T)
{
instance = (T)marker.target; return;
}
else if (marker.target is GameObject)
{
var component = ((GameObject)marker.target).GetComponent<T>();
if (component != null)
{
instance = component; return;
}
}
else if (marker.target is Component)
{
var component = ((Component)marker.target).GetComponent<T>();
if (component != null)
{
instance = component; return;
}
}
}
else
{
var component = marker.gameObject.GetComponent<T>();
if (component != null)
{
instance = component; return;
}
}
}
else if (marker.target != null && marker.target is T)
{
instance = (T)marker.target; return;
}
throw new System.MissingMemberException();
}
protected void Find()
{
var marker = default(LeanMarker);
if (instances.TryGetValue(name, out marker) == true)
{
Build(marker);
return;
}
else
{
var markers = FindObjectsOfType<LeanMarker>();
for (var i = markers.Length - 1; i >= 0; i--)
{
marker = markers[i];
if (marker.name == name)
{
Build(marker);
return;
}
}
}
throw new System.NullReferenceException("Failed to find LeanMarker in scene with name: " + name);
}
}
/// <summary>This stores all active an enables LeanMarker instances by their GameObject name.</summary>
private static Dictionary<string, LeanMarker> instances = new Dictionary<string, LeanMarker>();
/// <summary>The marker is pointing to this Object.</summary>
public Object Target { set { target = value; } get { return target; } } [SerializeField] private Object target;
[System.NonSerialized]
private string registeredName;
protected virtual void OnEnable()
{
registeredName = name;
instances.Add(registeredName, this);
}
protected virtual void OnDisable()
{
instances.Remove(registeredName);
}
#if UNITY_EDITOR
protected virtual void Reset()
{
target = gameObject;
}
#endif
}
}
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