Added LuaStore component and prefab to persist values across scene loads

9 years ago · 762d1f8a81
11 changed files with 513 additions and 9 deletions
--- a/Assets/Fungus/Lua/Resources/Lua/fungus.txt
+++ b/Assets/Fungus/Lua/Resources/Lua/fungus.txt
@ -134,9 +134,16 @@ end
 -- Fungus Prefs
 ---------------

-- Handy short alias to the real prefs object
+-- Handy alias to the real prefs object
 M.prefs = unity.prefs

+---------------
+-- Lua Store
+---------------
+
+-- Handy alias to the real store object
+M.store = unity.store
+
 -------------
 -- Say Dialog
 -------------
--- a/Assets/Fungus/Lua/Resources/Prefabs/LuaStore.prefab
+++ b/Assets/Fungus/Lua/Resources/Prefabs/LuaStore.prefab
@ -0,0 +1,52 @@
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--- a/Assets/Fungus/Lua/Resources/Prefabs/LuaStore.prefab.meta
+++ b/Assets/Fungus/Lua/Resources/Prefabs/LuaStore.prefab.meta
@ -0,0 +1,8 @@
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+guid: 48405e3dbda9a4a7694c21c9a2e712e1
+timeCreated: 1459763006
+licenseType: Free
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--- a/Assets/Fungus/Lua/Scripts/Editor/LuaStoreEditor.cs
+++ b/Assets/Fungus/Lua/Scripts/Editor/LuaStoreEditor.cs
@ -0,0 +1,28 @@
+using UnityEngine;
+using UnityEditor;
+using System.Collections;
+using MoonSharp.Interpreter;
+using MoonSharp.Interpreter.Serialization;
+
+namespace Fungus
+{
+
+	[CustomEditor(typeof(LuaStore))]
+	public class LuaStoreEditor : Editor
+	{
+		public override void OnInspectorGUI()
+		{
+			base.OnInspectorGUI();
+
+			// Use the Serialization extension to display the contents of the prime table.
+			LuaStore luaStore = target as LuaStore;
+			if (luaStore.primeTable != null)
+			{
+				EditorGUILayout.PrefixLabel(new GUIContent("Inspect Table", "Displays the contents of the fungus.store prime table."));
+				string serialized = luaStore.primeTable.Serialize();
+				EditorGUILayout.SelectableLabel(serialized, GUILayout.ExpandHeight(true));
+			}
+		}
+	}
+
+}
--- a/Assets/Fungus/Lua/Scripts/Editor/LuaStoreEditor.cs.meta
+++ b/Assets/Fungus/Lua/Scripts/Editor/LuaStoreEditor.cs.meta
@ -0,0 +1,12 @@
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--- a/Assets/Fungus/Lua/Scripts/Editor/MenuItems.cs
+++ b/Assets/Fungus/Lua/Scripts/Editor/MenuItems.cs
@ -21,11 +21,17 @@ namespace Fungus
        }

 		[MenuItem("Tools/Fungus/Create/Lua Script", false, 2002)]
-        static void CreateFungusInvoke()
+		static void CreateLuaScript()
 		{
 			SpawnPrefab("Prefabs/LuaScript", false);
 		}

+		[MenuItem("Tools/Fungus/Create/Lua Store", false, 2003)]
+		static void CreateLuaStore()
+		{
+			SpawnPrefab("Prefabs/LuaStore", false);
+		}
+
        [MenuItem("Tools/Fungus/Create/Lua File", false, 2100)]
        static void CreateLuaFile()
        {
--- a/Assets/Fungus/Lua/Scripts/LuaStore.cs
+++ b/Assets/Fungus/Lua/Scripts/LuaStore.cs
@ -0,0 +1,96 @@
+using UnityEngine;
+using System.Collections;
+using System.Collections.Generic;
+using MoonSharp.Interpreter;
+using MoonSharp.Interpreter.Serialization;
+
+namespace Fungus
+{
+
+	/// <summary>
+	/// Wrapper for a prime Lua table that persists across scene loads. 
+	/// This is useful for transferring values from one scene to another. One one LuaStore component may exist 
+	/// in a scene at a time.
+	/// </summary>
+	public class LuaStore : LuaBindingsBase 
+	{
+		/// <summary>
+		/// A Lua table that can be shared between multiple LuaEnvironments.
+		/// </summary>
+		public Table primeTable;
+
+		protected bool initialized;
+
+		protected static LuaStore instance;
+
+		public void Start()
+		{
+			Init();
+		}
+
+		/// <summary>
+		/// Initialize the LuaStore component.
+		/// This component behaves somewhat like a singleton in that only one instance
+		/// is permitted in the application which persists until shutdown.
+		/// </summary>
+		protected virtual bool Init()
+		{
+			if (initialized)	
+			{
+				return true;
+			}
+
+			if (instance == null)
+			{
+				// This is the first instance of the LuaStore, so store a static reference to it.
+				instance = this;
+			}
+			else if (instance != this)
+			{
+				// This is an extra instance of LuaStore. We only need one in the scene, so delete this one.
+				Destroy(gameObject);
+				return false;
+			}
+
+			// We're now guaranteed that this instance of LuaStore is the first and only instance.
+
+			primeTable = DynValue.NewPrimeTable().Table;
+
+			// DontDestroyOnLoad only works for root objects
+			transform.parent = null;
+
+			DontDestroyOnLoad(this);
+
+			initialized = true;
+
+			return true;
+		}
+
+		/// <summary>
+		/// Callback to bind this LuaStore component with the "unity" table in a LuaEnvironment component.
+		/// </summary>
+		public override void AddBindings(Table globals)
+		{
+			if (!Init())
+			{
+				return;
+			}
+
+			if (globals == null)
+			{
+				Debug.LogError("Lua globals table is null");
+				return;
+			}
+
+			Table unityTable = globals.Get("unity").Table;
+			if (unityTable == null)
+			{
+				Debug.LogError("Unity table not found");
+				return;
+			}
+
+			unityTable["store"] = primeTable;
+		}
+	}
+
+}
--- a/Assets/Fungus/Lua/Scripts/LuaStore.cs.meta
+++ b/Assets/Fungus/Lua/Scripts/LuaStore.cs.meta
@ -0,0 +1,12 @@
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--- a/Assets/Fungus/Lua/Scripts/LuaUtils.cs
+++ b/Assets/Fungus/Lua/Scripts/LuaUtils.cs
@ -76,8 +76,8 @@ namespace Fungus
 			}

 			InitTypes();
-			InitBindings();
            InitCustomObjects();
+			InitBindings();
 			InitStringTable();
        }

--- a/Assets/Tests/Lua/LuaEnvironmentTests.unity
+++ b/Assets/Tests/Lua/LuaEnvironmentTests.unity
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+  description: "Check if the LuaStore prime table is created \nand registered as fungus.store,
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--- a/ProjectSettings/EditorBuildSettings.asset
+++ b/ProjectSettings/EditorBuildSettings.asset
@ -7,3 +7,5 @@ EditorBuildSettings:
  m_Scenes:
  - enabled: 1
    path: Assets/FungusExamples/Sherlock/TheExperiment.unity
+  - enabled: 1
+    path: Assets/Tests/Lua/SceneB.unity