add MouseScrollDelta support to InputManager

src/Core/Input/IHandleInput.cs

@@ -6,6 +6,7 @@ namespace UnityExplorer.Core.Input
     public interface IHandleInput
     {
         Vector2 MousePosition { get; }
+        Vector2 MouseScrollDelta { get; }
 
         bool GetKeyDown(KeyCode key);
         bool GetKey(KeyCode key);

src/Core/Input/InputManager.cs

@@ -28,6 +28,8 @@ namespace UnityExplorer.Core.Input
 
         public static BaseInputModule UIInput => m_inputModule.UIModule;
 
+        public static Vector2 MouseScrollDelta => m_inputModule.MouseScrollDelta;
+
         public static void ActivateUIModule() => m_inputModule.ActivateModule();
 
         public static void AddUIModule()

src/Core/Input/InputSystem.cs

@@ -24,15 +24,18 @@ namespace UnityExplorer.Core.Input
             m_mouseCurrentProp = TMouse.GetProperty("current");
             m_leftButtonProp = TMouse.GetProperty("leftButton");
             m_rightButtonProp = TMouse.GetProperty("rightButton");
+            m_scrollDeltaProp = TMouse.GetProperty("scroll");
 
             m_positionProp = ReflectionUtility.GetTypeByName("UnityEngine.InputSystem.Pointer")
                             .GetProperty("position");
 
-            m_readVector2InputMethod = ReflectionUtility.GetTypeByName("UnityEngine.InputSystem.InputControl`1")
+            ReadV2ControlMethod = ReflectionUtility.GetTypeByName("UnityEngine.InputSystem.InputControl`1")
                                       .MakeGenericType(typeof(Vector2))
                                       .GetMethod("ReadValue");
         }
 
+        #region reflection cache
+
         public static Type TKeyboard => m_tKeyboard ?? (m_tKeyboard = ReflectionUtility.GetTypeByName("UnityEngine.InputSystem.Keyboard"));
         private static Type m_tKeyboard;
 
@@ -62,10 +65,17 @@ namespace UnityExplorer.Core.Input
         private static object m_rmb;
         private static PropertyInfo m_rightButtonProp;
 
+        private static MethodInfo ReadV2ControlMethod;
+
         private static object MousePositionInfo => m_pos ?? (m_pos = m_positionProp.GetValue(CurrentMouse, null));
         private static object m_pos;
         private static PropertyInfo m_positionProp;
-        private static MethodInfo m_readVector2InputMethod;
+
+        private static object MouseScrollInfo => m_scrollInfo ?? (m_scrollInfo = m_scrollDeltaProp.GetValue(CurrentMouse, null));
+        private static object m_scrollInfo;
+        private static PropertyInfo m_scrollDeltaProp;
+
+        #endregion
 
         public Vector2 MousePosition
         {
@@ -73,12 +83,21 @@ namespace UnityExplorer.Core.Input
             {
                 try
                 {
-                    return (Vector2)m_readVector2InputMethod.Invoke(MousePositionInfo, new object[0]);
+                    return (Vector2)ReadV2ControlMethod.Invoke(MousePositionInfo, new object[0]);
                 }
-                catch
+                catch { return Vector2.zero; }
+            }
+        }
+
+        public Vector2 MouseScrollDelta
+        {
+            get
+            {
+                try
                 {
-                    return Vector2.zero;
+                    return (Vector2)ReadV2ControlMethod.Invoke(MouseScrollInfo, new object[0]);
                 }
+                catch { return Vector2.zero; }
             }
         }
 

src/Core/Input/LegacyInput.cs

@@ -13,6 +13,7 @@ namespace UnityExplorer.Core.Input
             ExplorerCore.Log("Initializing Legacy Input support...");
 
             m_mousePositionProp = TInput.GetProperty("mousePosition");
+            m_mouseDeltaProp = TInput.GetProperty("mouseScrollDelta");
             m_getKeyMethod = TInput.GetMethod("GetKey", new Type[] { typeof(KeyCode) });
             m_getKeyDownMethod = TInput.GetMethod("GetKeyDown", new Type[] { typeof(KeyCode) });
             m_getMouseButtonMethod = TInput.GetMethod("GetMouseButton", new Type[] { typeof(int) });
@@ -23,6 +24,7 @@ namespace UnityExplorer.Core.Input
         private static Type m_tInput;
 
         private static PropertyInfo m_mousePositionProp;
+        private static PropertyInfo m_mouseDeltaProp;
         private static MethodInfo m_getKeyMethod;
         private static MethodInfo m_getKeyDownMethod;
         private static MethodInfo m_getMouseButtonMethod;
@@ -30,6 +32,8 @@ namespace UnityExplorer.Core.Input
 
         public Vector2 MousePosition => (Vector3)m_mousePositionProp.GetValue(null, null);
 
+        public Vector2 MouseScrollDelta => (Vector2)m_mouseDeltaProp.GetValue(null, null);
+
         public bool GetKey(KeyCode key) => (bool)m_getKeyMethod.Invoke(null, new object[] { key });
 
         public bool GetKeyDown(KeyCode key) => (bool)m_getKeyDownMethod.Invoke(null, new object[] { key });

src/Core/Input/NoInput.cs

@@ -8,6 +8,7 @@ namespace UnityExplorer.Core.Input
     public class NoInput : IHandleInput
     {
         public Vector2 MousePosition => Vector2.zero;
+        public Vector2 MouseScrollDelta => Vector2.zero;
 
         public bool GetKey(KeyCode key) => false;
         public bool GetKeyDown(KeyCode key) => false;