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 {
},
function() {
if(this._transformationLevel === 1 && !this._undoInProgress) {
- if(this._currentTransaction) {
- this._currentTransaction.pushTransformation(transformation);
- } else {
- this.undoStack.push(new Transaction([transformation]));
- }
+ this._currentTransaction.pushTransformation(transformation);
}
if(!this._undoInProgress && this._transformationLevel === 1) {
this.redoStack = [];
}
},
- startTransaction: function() {
+ startTransaction: function(metadata) {
if(this._currentTransaction) {
throw new Error('Nested transactions not supported!');
}
- this._currentTransaction = new Transaction([]);
+ this._currentTransaction = new Transaction([], metadata);
},
endTransaction: function() {
this._currentTransaction = null;
},
- transaction: function(callback, context) {
+ transaction: function(callback, context, metadata) {
var toret;
- this.startTransaction();
+ this.startTransaction(metadata);
toret = callback.call(context);
this.endTransaction();
return toret;
}
});
-var Transaction = function(transformations) {
+var Transaction = function(transformations, metadata) {
this.transformations = transformations || [];
+ this.metadata = metadata;
};
$.extend(Transaction.prototype, {
pushTransformation: function(transformation) {