added _WebViewPlugin_SetCurrentInstance() to set the instance pointer…

…, because GL.IssuePluginEvent() cannot pass a 64-bit integer (note: the logic works only for one instance).

plugins/Mac/Sources/WebView.m

@@ -271,6 +271,7 @@ - (void)render
 void _WebViewPlugin_Update(void *instance, int x, int y, float deltaY,
 	BOOL buttonDown, BOOL buttonPress, BOOL buttonRelease,
 	BOOL keyPress, unsigned char keyCode, const char *keyChars, int textureId);
+void _WebViewPlugin_SetCurrentInstance(void *instance);
 void UnityRenderEvent(int eventID);
 }
 
@@ -330,11 +331,18 @@ void _WebViewPlugin_Update(void *instance, int x, int y, float deltaY,
 		keyCode:keyCode keyChars:keyChars textureId:textureId];
 }
 
+static void *_instance;
+
+void _WebViewPlugin_SetCurrentInstance(void *instance)
+{
+	_instance = instance;
+}
+
 void UnityRenderEvent(int eventID)
 {
 	@autoreleasepool {
-		if ([pool containsObject:[NSValue valueWithPointer:(void *)eventID]]) {
-			WebViewPlugin *webViewPlugin = (WebViewPlugin *)eventID;
+		if ([pool containsObject:[NSValue valueWithPointer:(void *)_instance]]) {
+			WebViewPlugin *webViewPlugin = (WebViewPlugin *)_instance;
 			[webViewPlugin render];
 		}
 	}

plugins/WebViewObject.cs

@@ -95,6 +95,8 @@ private static extern void _WebViewPlugin_EvaluateJS(
 	private static extern void _WebViewPlugin_Update(IntPtr instance,
 		int x, int y, float deltaY, bool down, bool press, bool release,
 		bool keyPress, short keyCode, string keyChars, int textureId);
+	[DllImport("WebView")]
+	private static extern void _WebViewPlugin_SetCurrentInstance(IntPtr instance);
 #elif UNITY_IPHONE
 	[DllImport("__Internal")]
 	private static extern IntPtr _WebViewPlugin_Init(string gameObject);
@@ -154,16 +156,20 @@ void OnDestroy()
 		if (webView == IntPtr.Zero)
 			return;
 		_WebViewPlugin_Destroy(webView);
+		webView = IntPtr.Zero;
 #elif UNITY_IPHONE
 		if (webView == IntPtr.Zero)
 			return;
 		_WebViewPlugin_Destroy(webView);
+		webView = IntPtr.Zero;
 #elif UNITY_ANDROID
 		if (webView == null)
 			return;
 		webView.Call("Destroy");
+		webView = null;
 #elif UNITY_WEBPLAYER
 		Application.ExternalCall("unityWebView.destroy", name);
+		webView = null;
 #endif
 	}
 
@@ -287,8 +293,9 @@ void OnGUI()
 		_WebViewPlugin_Update(webView,
 			(int)(pos.x - rect.x), (int)(pos.y - rect.y), deltaY,
 			down, press, release, keyPress, keyCode, keyChars,
-			texture.GetNativeTextureID());
-		GL.IssuePluginEvent((int)webView);
+			(int)texture.GetNativeTexturePtr());
+		_WebViewPlugin_SetCurrentInstance(webView);
+		GL.IssuePluginEvent(-1);
 		Matrix4x4 m = GUI.matrix;
 		GUI.matrix = Matrix4x4.TRS(new Vector3(0, Screen.height, 0),
 			Quaternion.identity, new Vector3(1, -1, 1));