FIX: Will now close Input Action Asset Editor windows from previous sessions when the corresponding action was deleted. (#850)

Author: jechter

Packages/com.unity.inputsystem/CHANGELOG.md

@@ -10,7 +10,13 @@ however, it has to be formatted properly to pass verification tests.
 ## [0.9.7-preview] - 2099-1-1
 
 ### Fixed
+
+-Will now close Input Action Asset Editor windows from previous sessions when the corresponding action was deleted.
+
 #### Actions
+
+- Fixed `CallbackContext.ReadValue` throwing when invoked during device removal
+
 ### Changed
 ### Added
 
@@ -24,7 +30,6 @@ however, it has to be formatted properly to pass verification tests.
 
 #### Actions
 
-- Fixed `CallbackContext.ReadValue` throwing when invoked during device removal
 - Setting timeouts from `IInputInteraction.Process` not working as expected when processing happened in response to previous timeout expiring (#714).
 - Pending timeouts on a device not being removed when device was removed.
 

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

@@ -46,7 +46,6 @@ private InputActionAsset importedAsset
                 if (m_ImportedAssetObject == null)
                     LoadImportedObjectFromGuid();
 
-                Debug.Assert(m_ImportedAssetObject != null);
                 return m_ImportedAssetObject;
             }
         }
@@ -64,16 +63,22 @@ public InputActionAssetManager(InputActionAsset inputActionAsset)
 
         public bool dirty => m_IsDirty;
 
-        public void Initialize()
+        public bool Initialize()
         {
             if (m_AssetObjectForEditing == null)
             {
+                if (importedAsset == null)
+                    // The asset we want to edit no longer exists.
+                    return false;
+
                 CreateWorkingCopyAsset();
             }
             else
             {
                 m_SerializedObject = new SerializedObject(m_AssetObjectForEditing);
             }
+
+            return true;
         }
 
         public void Dispose()

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

@@ -210,7 +210,12 @@ private void OnEnable()
             // Initialize after assembly reload.
             if (m_ActionAssetManager != null)
             {
-                m_ActionAssetManager.Initialize();
+                if (!m_ActionAssetManager.Initialize())
+                {
+                    // The asset we want to edit no longer exists.
+                    Close();
+                    return;
+                }
                 m_ActionAssetManager.onDirtyChanged = OnDirtyChanged;
 
                 InitializeTrees();