public void ReturnsOneForBatchWithOneAction()
{
var model = new Mocks.MockModel();
var batch = new Batch();
batch.AddAction(new PropertyChangeUndo(model, "Value", model.Value));
Assert.AreEqual(1, batch.ActionCount);
}
public void ReturnsFalseForBatchWithOneAction()
{
var model = new Mocks.MockModel();
var batch = new Batch();
batch.AddAction(new PropertyChangeUndo(model, "Value", model.Value));
Assert.IsFalse(batch.IsEmptyBatch);
}
public void ReturnsFalseForBatchWithMultipleActions()
{
var model1 = new Mocks.MockModel();
var model2 = new Mocks.MockModel();
var batch = new Batch();
batch.AddAction(new PropertyChangeUndo(model1, "Value", model1.Value));
batch.AddAction(new PropertyChangeUndo(model2, "Value", model2.Value));
Assert.IsFalse(batch.IsEmptyBatch);
}
public void ReturnsFalseForEmptyBatch()
{
var batch = new Batch();
Assert.IsFalse(batch.IsSingleActionBatch);
}
public void ReturnsTrueForEmptyBatch()
{
var batch = new Batch();
Assert.IsTrue(batch.IsEmptyBatch);
}
public void ReturnsZeroForEmptyBatch()
{
var batch = new Batch();
Assert.AreEqual(0, batch.ActionCount);
}
public void IsTrueWhenAtLeastOneActionCanRedo()
{
var model1 = new Mocks.MockModel();
var model2 = new Mocks.MockModel();
var batch = new Batch();
batch.AddAction(new PropertyChangeUndo(model1, "Value", model1.Value));
batch.AddAction(new PropertyChangeUndo(model2, "Value", model2.Value));
Assert.IsTrue(batch.CanRedo);
}
public void IsFalseWhenNoActionsCanRedo()
{
var model1 = new Mocks.MockModel();
var batch = new Batch();
batch.AddAction(new ActionUndo(model1, () => model1.Value = "Value"));
Assert.IsFalse(batch.CanRedo);
}
/// <summary>
/// Adds a new undo operation to the stack.
/// </summary>
/// <param name="operation">The operation.</param>
/// <param name="noInsertIfExecutingOperation">Do not insert record if currently running undo/redo.</param>
/// <returns><c>true</c> if undo operation was added to stack; otherwise <c>false</c>.</returns>
/// <exception cref="ArgumentNullException">The <paramref name="operation"/> is <c>null</c>.</exception>
public bool Add(IMementoSupport operation, bool noInsertIfExecutingOperation = true)
{
Argument.IsNotNull("operation", operation);
if (!IsEnabled)
{
return false;
}
if (noInsertIfExecutingOperation && _isUndoingOperation)
{
return false;
}
lock (_lock)
{
if (_currentBatch != null)
{
_currentBatch.AddAction(operation);
}
else
{
var batch = new Batch();
batch.AddAction(operation);
Add(batch);
}
}
return true;
}
/// <summary>
/// Ends the current batch and adds it to the stack by calling <see cref="Add(Catel.Memento.IMementoBatch,bool)"/>.
/// <para />
/// If there is currently no batch, this method will silently exit.
/// </summary>
/// <returns>The <see cref="IMementoBatch"/> that has just been ended or <c>null</c> if there was no current batch.</returns>
public IMementoBatch EndBatch()
{
if (_currentBatch == null)
{
return null;
}
var batch = _currentBatch;
Add(batch);
_currentBatch = null;
Log.Debug("Ended batch with title '{0}' and description '{1}' with '{2}' actions", ObjectToStringHelper.ToString(batch.Title),
ObjectToStringHelper.ToString(batch.Description), batch.ActionCount);
return batch;
}
/// <summary>
/// Begins a new batch.
/// <para />
/// Note that this method will always call <see cref="EndBatch"/> before creating the new batch to ensure
/// that a new batch is actually created.
/// <para />
/// All operations added via the <see cref="Add(Catel.Memento.IMementoSupport,bool)"/> will belong the this batch
/// and be handled as a single operation.
/// </summary>
/// <param name="title">The title which can be used to display this batch i a user interface.</param>
/// <param name="description">The description which can be used to display this batch i a user interface.</param>
/// <returns>The <see cref="IMementoBatch" /> that has just been created.</returns>
public IMementoBatch BeginBatch(string title = null, string description = null)
{
EndBatch();
var batch = new Batch
{
Title = title,
Description = description
};
Log.Debug("Starting batch with title '{0}' and description '{1}'", ObjectToStringHelper.ToString(batch.Title),
ObjectToStringHelper.ToString(batch.Description));
_currentBatch = batch;
return batch;
}
