/// <summary>
/// Redo the number of actions specified by <paramref name="count"/>.
/// </summary>
/// <param name="count">The number of actions to redo.</param>
public void Redo(int count = 1)
{
lock (LockObject)
{
if (count > RedoActions.Count)
{
throw new ArgumentOutOfRangeException("Can't redo the number of actions specified.", nameof(count));
}
IsRedoing = true;
for (var i = 0; i < count; i++)
{
// Get the next action to redo.
var action = RedoActions.Peek();
OnBeforeRedo(new UndoEventArgs(action));
action.Redo();
// Add the action to the undo stack.
UndoActions.Push(RedoActions.Pop());
OnAfterRedo(new UndoEventArgs(action));
}
IsRedoing = false;
OnChanged(EventArgs.Empty);
}
}
/// <summary>
/// Adds a new action to the undo stack and clears the redo stack.
/// </summary>
/// <param name="action"></param>
public void Add(IUndoAction action)
{
lock (LockObject)
{
UndoActions.Push(action);
RedoActions.Clear();
}
OnChanged(EventArgs.Empty);
}
public TextAction Add(TextCursor cursor, TextAction.ActionType type)
{
TextAction action = new TextAction(cursor, type);
UndoActions.Push(action);
if (RedoActions.Any())
{
RedoActions.Clear();
}
return(action);
}
public bool Redo(out TextCursor cursor)
{
cursor = null;
if (!RedoActions.Any())
{
return(false);
}
var action = RedoActions.Pop();
cursor = action.Cursor;
cursor.Redo(action);
UndoActions.Push(action);
return(RedoActions.Any());
}