Handling invalid editor states from preview releases (#1636)

Author: ahus1

Diff for: CHANGELOG.adoc

@@ -7,6 +7,10 @@ This document provides a high-level view of the changes introduced by release.
 [[releasenotes]]
 == Release notes
 
+=== 0.42.2
+
+- Handling invalid editor states from preview releases (#1636)
+
 === 0.42.1
 
 - Reworking the changes for EAP, restoring preview and menu bar functionality (#1636)

Diff for: src/main/java/org/asciidoc/intellij/ui/SplitFileEditor.java

@@ -202,7 +202,12 @@ public void setState(@NotNull FileEditorState state) {
         mySecondEditor.setState(compositeState.getSecondState());
       }
       if (compositeState.getSplitLayout() != null) {
-        mySplitEditorLayout = SplitEditorLayout.valueOf(compositeState.getSplitLayout());
+        try {
+          mySplitEditorLayout = SplitEditorLayout.valueOf(compositeState.getSplitLayout());
+        } catch (IllegalArgumentException ignore) {
+          // found an obsolete or old value, using the default value
+          mySplitEditorLayout = AsciiDocApplicationSettings.getInstance().getAsciiDocPreviewSettings().getSplitEditorLayout();
+        }
         invalidateLayout();
       }
     }