/// <summary>
/// Performs a Redo operation, i.e. applies the next action on the stack.
/// </summary>
public static void Redo()
{
UndoRedoAction action = NextAction;
if (action == null)
{
return;
}
actionIndex++;
action.Do();
OnStackChanged();
}
private static void AppendAction(UndoRedoAction action, bool performAction)
{
if (action.IsVoid)
{
return;
}
if (macroBeginCount > 0)
{
UndoRedoAction prev = macroList.Count > 0 ? macroList[macroList.Count - 1] : null;
if (prev != null && prev.CanAppend(action))
{
prev.Append(action, performAction);
}
else
{
macroList.Add(action);
if (performAction)
{
action.Do();
}
}
}
else
{
if (Sandbox.IsActive)
{
if (performAction)
{
action.Do();
}
return;
}
bool hadNext = false;
if (actionStack.Count - actionIndex - 1 > 0)
{
actionStack.RemoveRange(actionIndex + 1, actionStack.Count - actionIndex - 1);
hadNext = true;
}
UndoRedoAction prev = PrevAction;
if (!lastActionFinished && !hadNext && prev != null && prev.CanAppend(action))
{
prev.Append(action, performAction);
}
else
{
lastActionFinished = false;
actionStack.Add(action);
actionIndex++;
if (performAction)
{
action.Do();
}
}
if (actionStack.Count > maxActions)
{
actionIndex -= actionStack.Count - maxActions;
actionStack.RemoveRange(0, actionStack.Count - maxActions);
}
OnStackChanged();
}
}
private static void AppendAction(UndoRedoAction action, bool performAction)
{
if (action.IsVoid) return;
if (macroBeginCount > 0)
{
UndoRedoAction prev = macroList.Count > 0 ? macroList[macroList.Count - 1] : null;
if (prev != null && prev.CanAppend(action))
{
prev.Append(action, performAction);
}
else
{
macroList.Add(action);
if (performAction) action.Do();
}
}
else
{
if (Sandbox.IsActive)
{
if (performAction) action.Do();
return;
}
bool hadNext = false;
if (actionStack.Count - actionIndex - 1 > 0)
{
actionStack.RemoveRange(actionIndex + 1, actionStack.Count - actionIndex - 1);
hadNext = true;
}
UndoRedoAction prev = PrevAction;
if (!lastActionFinished && !hadNext && prev != null && prev.CanAppend(action))
{
prev.Append(action, performAction);
}
else
{
lastActionFinished = false;
actionStack.Add(action);
actionIndex++;
if (performAction) action.Do();
}
if (actionStack.Count > maxActions)
{
actionIndex -= actionStack.Count - maxActions;
actionStack.RemoveRange(0, actionStack.Count - maxActions);
}
OnStackChanged();
}
}
