X-Git-Url: https://git.mdrn.pl/fnpeditor.git/blobdiff_plain/756b563b822bdcfa1d1b7d3eebcf313cb01c5560..d3d80ba74ca2e2afbd262edfe4be39010c86ebde:/src/smartxml/smartxml.js?ds=sidebyside

diff --git a/src/smartxml/smartxml.js b/src/smartxml/smartxml.js
index ab4d6fb..35c5299 100644
--- a/src/smartxml/smartxml.js
+++ b/src/smartxml/smartxml.js
@@ -476,6 +476,12 @@ $.extend(Document.prototype, Backbone.Events, {
     transform: function(Transformation, args) {
         var toret, transformation;
 
+        if(!this._currentTransaction) {
+            return this.transaction(function() {
+                return this.transform(Transformation, args);
+            }, this);
+        }
+
         if(typeof Transformation === 'function') {
             transformation = new Transformation(this, this, args);
         } else {
@@ -491,13 +497,7 @@ $.extend(Document.prototype, Backbone.Events, {
                 },
                 function() {
                     if(this._transformationLevel === 1 && !this._undoInProgress) {
-                        if(this._currentTransaction) {
-                            this._currentTransaction.pushTransformation(transformation);
-                        } else {
-                            this.undoStack.push(new Transaction([transformation]));
-                        }
-                    }
-                    if(!this._undoInProgress && this._transformationLevel === 1) {
+                        this._currentTransaction.pushTransformation(transformation);
                         this.redoStack = [];
                     }
                 }
@@ -556,11 +556,12 @@ $.extend(Document.prototype, Backbone.Events, {
         }
     },
 
-    startTransaction: function() {
+    startTransaction: function(metadata) {
         if(this._currentTransaction) {
             throw new Error('Nested transactions not supported!');
         }
-        this._currentTransaction = new Transaction([]);
+        this._rollbackBackup = this.root.clone();
+        this._currentTransaction = new Transaction([], metadata);
     },
 
     endTransaction: function() {
@@ -573,10 +574,28 @@ $.extend(Document.prototype, Backbone.Events, {
         this._currentTransaction = null;
     },
 
-    transaction: function(callback, context) {
+    rollbackTransaction: function() {
+        if(!this._currentTransaction) {
+            throw new Error('Transaction rollback requested, but there is no transaction in progress!');
+        }
+        this.replaceRoot(this._rollbackBackup);
+        this._rollbackBackup = null;
+        this._currentTransaction = null;
+    },
+
+    transaction: function(callback, params) {
         var toret;
-        this.startTransaction();
-        toret = callback.call(context);
+        params = params || {};
+        this.startTransaction(params.metadata);
+        try {
+            toret = callback.call(params.context || this);
+        } catch(e) {
+            if(params.error) {
+                params.error(e);
+            }
+            this.rollbackTransaction();
+            return;
+        }
         this.endTransaction();
         return toret;
     },
@@ -606,8 +625,9 @@ $.extend(Document.prototype, Backbone.Events, {
     }
 });
 
-var Transaction = function(transformations) {
+var Transaction = function(transformations, metadata) {
     this.transformations = transformations || [];
+    this.metadata = metadata;
 };
 $.extend(Transaction.prototype, {
     pushTransformation: function(transformation) {