From 740d6588900f497243c83013da211da79676a9a4 Mon Sep 17 00:00:00 2001
From: Scott Vorthmann <scott@vorthmann.org>
Date: Sun, 5 Jan 2025 09:08:48 -0800
Subject: [PATCH] Fixed the defect interpreting nested branches

---
 online/src/worker/legacy/edit.js        |  2 +-
 online/src/worker/legacy/interpreter.js | 14 ++++++++------
 2 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/online/src/worker/legacy/edit.js b/online/src/worker/legacy/edit.js
index 39cf3aa7e..9b553ecc7 100644
--- a/online/src/worker/legacy/edit.js
+++ b/online/src/worker/legacy/edit.js
@@ -41,7 +41,7 @@ export class ParsedEdit
 
   perform( context )
   {
-    console.log( 'perform', this.nativeElement.id, this.nativeElement.tagName );
+    // console.log( 'perform', this.nativeElement.id, this.nativeElement.tagName );
     this.legacyEdit = this.interpret.call( this, this.nativeElement, context );
   }
 
diff --git a/online/src/worker/legacy/interpreter.js b/online/src/worker/legacy/interpreter.js
index c589b0940..aedc134bd 100644
--- a/online/src/worker/legacy/interpreter.js
+++ b/online/src/worker/legacy/interpreter.js
@@ -115,15 +115,16 @@ export class Interpreter
         let top;
         do {
           top = this.stack .pop();
+          if ( !! top ) {
+            this.cursor .endBranch( top.branch );
+            this.cursor = top.cursor;  // overwrite and discard the prior value
+            this.cursor .setNextEdit( top.branch .nextSibling() );
+          }
         } while ( top && ! top.branch .nextSibling() )
         if ( top ) {
-          this.cursor = top.cursor;  // overwrite and discard the prior value
-          this.cursor .endBranch( top.branch );
-          this.cursor .setNextEdit( top.branch .nextSibling() );
-          return breakpointHit? Step.DONE : Step.OUT;
+          return breakpointHit? Step.DONE : Step.OUT;  // at the end of a branch
         } else {
-          // at the end of the editHistory
-          return Step.DONE;
+          return Step.DONE;                            // at the end of the editHistory
         }
       }
     }
@@ -222,6 +223,7 @@ export class EditCursor
     for (const edit of reversed) {
       const trueEdit = edit .legacyEdit;
       if ( trueEdit ) {
+        // console.log( 'undo', edit.nativeElement.id, edit.nativeElement.tagName );
         trueEdit .undo();
       } else
         console.log( 'No true edit?' );