/// <summary>
/// Undoes the most recently done (or redone) action
/// </summary>
/// <returns>true if there was something to undo, false otherwise</returns>
public bool Undo()
{
if (undoStack.Count == 0)
{
return(false);
}
var toUndo = undoStack.Pop();
toUndo.Undo();
redoStack.Push(toUndo);
OnUndoRedoAction.Fire();
if (toUndo.GetType().HasAttr <TransientUndoRedoAction>())
{
Undo();
}
if (undoStack.None())
{
OnEmptyUndoStack.Fire();
}
return(true);
}
/// <summary>
/// Redoes the las thing that was undone.
/// </summary>
/// <returns>true if there was something to redo, false otherwise</returns>
public bool Redo()
{
if (redoStack.Count == 0)
{
return(false);
}
var toRedo = redoStack.Pop();
toRedo.Redo();
undoStack.Push(toRedo);
OnUndoRedoAction.Fire();
if (redoStack.Count > 0 && redoStack.Peek().GetType().HasAttr <TransientUndoRedoAction>())
{
Redo();
}
return(true);
}
public void Done(IUndoRedoAction action)
{
undoStack.Push(action);
redoStack.Clear();
OnUndoRedoAction.Fire();
}
