From f63769e206281f306f6c2cb937358837da450185 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Aleksander=20=C5=81ukasz?=
 <aleksander.lukasz@nowoczesnapolska.org.pl>
Date: Wed, 2 Apr 2014 21:22:47 +0200
Subject: [PATCH] smartxml: transaction rollback fix

Not resetting transformationLevel counter on rollback caused subsequent
top level transformations to not being pushed to undo stack which
broke undo in that scenario.
---
 src/smartxml/smartxml.js      |  1 +
 src/smartxml/smartxml.test.js | 23 +++++++++++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/src/smartxml/smartxml.js b/src/smartxml/smartxml.js
index c23e06d..7d3f332 100644
--- a/src/smartxml/smartxml.js
+++ b/src/smartxml/smartxml.js
@@ -581,6 +581,7 @@ $.extend(Document.prototype, Backbone.Events, {
         this.replaceRoot(this._rollbackBackup);
         this._rollbackBackup = null;
         this._currentTransaction = null;
+        this._transformationLevel = 0;
     },
 
     transaction: function(callback, params) {
diff --git a/src/smartxml/smartxml.test.js b/src/smartxml/smartxml.test.js
index e4e2724..5d1ca3e 100644
--- a/src/smartxml/smartxml.test.js
+++ b/src/smartxml/smartxml.test.js
@@ -1679,6 +1679,29 @@ describe('smartxml', function() {
                 doc.redo();
                 expect(doc.root.getAttr('t')).to.equal('1');
             });
+            it('can perform undo of an operation performed after automatic transaction rollback', function() {
+                var doc = getDocumentFromXML('<section></section>'),
+                    extension = {document: {transformations: {
+                        throwingTransformation: function() { throw new Error(); }
+                    }}};
+
+                doc.registerExtension(extension);
+
+                doc.throwingTransformation();
+
+                doc.transaction(function() {
+                    doc.root.setAttr('x', '2');
+                });
+
+                expect(doc.undoStack.length).to.equal(1);
+                expect(doc.root.getAttr('x')).to.equal('2');
+
+                doc.undo();
+
+                expect(doc.undoStack.length).to.equal(0);
+                expect(doc.root.getAttr('x')).to.be.undefined;
+
+            });
         });
     });
 
-- 
2.20.1