Add support in GetScript to interface types

#290

Source/Engine/Level/Actor.cpp

@@ -498,10 +498,21 @@ Script* Actor::GetScript(int32 index) const
 Script* Actor::GetScript(const MClass* type) const
 {
     CHECK_RETURN(type, nullptr);
-    for (auto script : Scripts)
+    if (type->IsInterface())
     {
-        if (script->GetClass()->IsSubClassOf(type))
-            return script;
+        for (auto script : Scripts)
+        {
+            if (script->GetClass()->HasInterface(type))
+                return script;
+        }
+    }
+    else
+    {
+        for (auto script : Scripts)
+        {
+            if (script->GetClass()->IsSubClassOf(type))
+                return script;
+        }
     }
     return nullptr;
 }
@@ -509,9 +520,18 @@ Script* Actor::GetScript(const MClass* type) const
 Array<Script*> Actor::GetScripts(const MClass* type) const
 {
     Array<Script*> result;
-    for (auto script : Scripts)
-        if (script->GetClass()->IsSubClassOf(type))
-            result.Add(script);
+    if (type->IsInterface())
+    {
+        for (auto script : Scripts)
+            if (script->GetClass()->HasInterface(type))
+                result.Add(script);
+    }
+    else
+    {
+        for (auto script : Scripts)
+            if (script->GetClass()->IsSubClassOf(type))
+                result.Add(script);
+    }
     return result;
 }
 

Source/Engine/Level/Actor.cs

@@ -222,7 +222,7 @@ namespace FlaxEngine
         /// </summary>
         /// <typeparam name="T">Type of the script to search for. Includes any scripts derived from the type.</typeparam>
         /// <returns>The script or null if failed to find.</returns>
-        public T GetScript<T>() where T : Script
+        public T GetScript<T>() where T : class
         {
             return GetScript(typeof(T)) as T;
         }
@@ -233,7 +233,7 @@ namespace FlaxEngine
         /// <typeparam name="T">Type of the script to search for. Includes any scripts derived from the type.</typeparam>
         /// <param name="script">The returned script, valid only if method returns true.</param>
         /// <returns>True if found a script of that type or false if failed to find.</returns>
-        public bool TryGetScript<T>(out T script) where T : Script
+        public bool TryGetScript<T>(out T script) where T : class
         {
             script = GetScript(typeof(T)) as T;
             return script != null;
@@ -244,7 +244,7 @@ namespace FlaxEngine
         /// </summary>
         /// <typeparam name="T">Type of the object.</typeparam>
         /// <returns>Script instance if found, null otherwise.</returns>
-        public T FindScript<T>() where T : Script
+        public T FindScript<T>() where T : class
         {
             return FindScript(typeof(T)) as T;
         }
@@ -290,7 +290,7 @@ namespace FlaxEngine
         /// </summary>
         /// <typeparam name="T">Type of the scripts to search for. Includes any scripts derived from the type.</typeparam>
         /// <returns>All scripts matching the specified type.</returns>
-        public T[] GetScripts<T>() where T : Script
+        public T[] GetScripts<T>() where T : class
         {
             var count = ScriptsCount;
             var length = 0;

Source/Engine/Scripting/ManagedCLR/MClass.cpp

@@ -124,6 +124,15 @@ bool MClass::IsSubClassOf(const MonoClass* monoClass) const
 }
 #endif
 
+bool MClass::HasInterface(const MClass* klass) const
+{
+#if USE_MONO
+    return klass && mono_class_is_assignable_from(klass->GetNative(), _monoClass) != 0;
+#else
+    return false;
+#endif
+}
+
 bool MClass::IsInstanceOfType(MObject* object) const
 {
     if (object == nullptr)