void IUndoEngineOperations.AddUndoUnitCore(UndoUnit unit)
{
//add element to Undo list
this.containerUndoUnit.DoList.Add(unit);
//clear redo list
this.containerUndoUnit.RedoList.Clear();
}
public void AddUndoUnit(UndoUnit unit)
{
if (unit == null)
{
throw FxTrace.Exception.ArgumentNull("unit");
}
this.undoEngineImpl.AddUndoUnitCore(unit);
}
public void AddUndoUnit(UndoUnit unit)
{
if (unit == null)
{
throw FxTrace.Exception.ArgumentNull("unit");
}
this.undoEngineImpl.AddUndoUnitCore(unit);
}
private void NotifyUndoUnitCancelled(UndoUnit unit)
{
if (this.UndoUnitCancelled != null)
{
this.UndoUnitCancelled(this, new UndoUnitEventArgs()
{
UndoUnit = unit
});
}
}
private void NotifyRedoExecuted(UndoUnit unit)
{
if (this.RedoCompleted != null)
{
this.RedoCompleted(this, new UndoUnitEventArgs()
{
UndoUnit = unit
});
}
}
void IUndoEngineOperations.AddUndoUnitCore(UndoUnit unit)
{
undoBuffer.Add(unit);
this.NotifyUndoUnitAdded(unit);
if (undoBuffer.Count > capacity)
{
undoBuffer.RemoveAt(0);
NotifyUndoUnitDiscarded();
}
redoBuffer.Clear();
this.NotifyUndoRedoBufferChanged();
}
bool IUndoEngineOperations.RedoCore()
{
bool succeeded = false;
if (redoBuffer.Count > 0)
{
UndoUnit unitToRedo = redoBuffer.Last();
redoBuffer.RemoveAt(redoBuffer.Count - 1);
unitToRedo.Redo();
undoBuffer.Add(unitToRedo);
NotifyRedoExecuted(unitToRedo);
succeeded = true;
}
return(succeeded);
}
bool IUndoEngineOperations.RedoCore()
{
//if there is anything to redo
bool succeeded = false;
if (this.containerUndoUnit.RedoList.Count > 0)
{
//get first element to redo
UndoUnit unitToRedo = this.containerUndoUnit.RedoList.First();
//remove it
this.containerUndoUnit.RedoList.RemoveAt(0);
//redo it
unitToRedo.Redo();
//add it to the end of undo list
this.containerUndoUnit.DoList.Add(unitToRedo);
succeeded = true;
}
return(succeeded);
}
bool IUndoEngineOperations.UndoCore()
{
//if there is anything to undo
bool succeeded = false;
if (this.containerUndoUnit.DoList.Count > 0)
{
//get the last element done
UndoUnit unitToUndo = this.containerUndoUnit.DoList.Last();
//remove it
this.containerUndoUnit.DoList.RemoveAt(this.containerUndoUnit.DoList.Count - 1);
//undo it
unitToUndo.Undo();
//and insert to the head of redo list
this.containerUndoUnit.RedoList.Insert(0, unitToUndo);
succeeded = true;
}
return(succeeded);
}
void IUndoEngineOperations.AddUndoUnitCore(UndoUnit unit)
{
//add element to Undo list
this.containerUndoUnit.DoList.Add(unit);
//clear redo list
this.containerUndoUnit.RedoList.Clear();
}
private void NotifyUndoUnitCancelled(UndoUnit unit)
{
if (this.UndoUnitCancelled != null)
{
this.UndoUnitCancelled(this, new UndoUnitEventArgs() { UndoUnit = unit });
}
}
private void NotifyRedoExecuted(UndoUnit unit)
{
if (this.RedoCompleted != null)
{
this.RedoCompleted(this, new UndoUnitEventArgs() { UndoUnit = unit });
}
}
void IUndoEngineOperations.AddUndoUnitCore(UndoUnit unit)
{
undoBuffer.Add(unit);
this.NotifyUndoUnitAdded(unit);
if (undoBuffer.Count > capacity)
{
undoBuffer.RemoveAt(0);
NotifyUndoUnitDiscarded();
}
redoBuffer.Clear();
this.NotifyUndoRedoBufferChanged();
}