CHANGE: Enable IMGUI Asset Editor for input action assets when UITK is available (ISX-1541) (#1731)

The UITK Editor view is only enabled for the Project Wide Actions Asset Editor, in the Project Settings.

Author: jfreire-unity

Packages/com.unity.inputsystem/InputSystem/Editor/AssetEditor/InputActionEditorWindow.cs

@@ -38,10 +38,9 @@ internal class InputActionEditorWindow : EditorWindow, IDisposable
         public static bool OnOpenAsset(int instanceId, int line)
         {
 #if UNITY_INPUT_SYSTEM_UI_TK_ASSET_EDITOR
-            if (InputSystem.settings.IsFeatureEnabled(InputFeatureNames.kUseUIToolkitEditor))
+            if (InputSystem.settings.IsFeatureEnabled(InputFeatureNames.kUseUIToolkitEditor) && InputActionsEditorWindow.isWindowEnabled)
                 return false;
 #endif
-
             var path = AssetDatabase.GetAssetPath(instanceId);
             if (!path.EndsWith(k_FileExtension, StringComparison.InvariantCultureIgnoreCase))
                 return false;

Packages/com.unity.inputsystem/InputSystem/Editor/UITKAssetEditor/InputActionsEditorWindow.cs

@@ -24,6 +24,13 @@ static EnableUITKEditor()
     internal class InputActionsEditorWindow : EditorWindow
     {
         private static readonly string k_FileExtension = "." + InputActionAsset.Extension;
+        /// <summary>
+        /// Controls whether the UITK version of the InputActionAsset Editor is enabled or not for editing Input Action
+        /// assets.
+        /// </summary>
+        /// At the moment, the UITK Asset Editor doesn't have feature parity with the IMGUI version.
+        /// This is set to false to show the IMGUI version of the InputActionAsset Editor instead.
+        internal static bool isWindowEnabled = false;
         private int m_AssetId;
         private string m_AssetPath;
         private string m_AssetJson;
@@ -32,7 +39,7 @@ internal class InputActionsEditorWindow : EditorWindow
         [OnOpenAsset]
         public static bool OpenAsset(int instanceId, int line)
         {
-            if (!InputSystem.settings.IsFeatureEnabled(InputFeatureNames.kUseUIToolkitEditor))
+            if (!InputSystem.settings.IsFeatureEnabled(InputFeatureNames.kUseUIToolkitEditor) || !isWindowEnabled)
                 return false;
 
             var path = AssetDatabase.GetAssetPath(instanceId);