/// <summary>
/// Undoes the last step.
/// </summary>
/// <param name="buffer">Buffer to use</param>
/// <remarks>Used internally, don't use!</remarks>
internal UndoStep Undo(ref BufferManager buffer)
{
if (UndoStack.Count > 0)
{
UndoStep step = (UndoStep)UndoStack.Peek();
RedoStack.Push(step);
UndoStack.Pop();
switch (step.Action)
{
case UndoAction.Insert:
buffer.SetBytes(step.Start, step.GetBytes(), false);
break;
case UndoAction.Remove:
buffer.RemoveBytes(step.Start, step.GetBytes().Length);
break;
case UndoAction.Overwrite:
buffer.SetBytes(step.Start, step.GetOldBytes(), true);
break;
}
EventHandler <UndoEventArgs> temp = ActionUndone;
if (temp != null)
{
temp(this, new UndoEventArgs(step, true));
}
return(step);
}
return(null);
}
/// <summary>
/// Adds a step to the stack.
/// </summary>
/// <param name="step">The step to add.</param>
internal void AddUndoStep(UndoStep step)
{
UndoStack.Push(step);
RedoStack.Clear();
EventHandler<UndoEventArgs> temp = ActionUndone;
if (temp != null)
temp(this, new UndoEventArgs(step, false));
}
/// <summary>
/// Adds a step to the stack.
/// </summary>
/// <param name="step">The step to add.</param>
internal void AddUndoStep(UndoStep step)
{
UndoStack.Push(step);
RedoStack.Clear();
EventHandler <UndoEventArgs> temp = ActionUndone;
if (temp != null)
{
temp(this, new UndoEventArgs(step, false));
}
}
public UndoEventArgs(UndoStep step, bool redo)
{
undostep = step;
isRedo = redo;
}
public UndoEventArgs(UndoStep step, bool redo)
{
undostep = step;
isRedo = redo;
}