/// <summary>
/// Performs a redo
/// </summary>
/// <returns>False if there weren't any redos, true otherwise</returns>
public bool Redo()
{
if (!this.AnyRedos)
{
return(false);
}
bool anyUndosChange = m_undoStack.Count == 0;
bool anyRedosChange = m_redoStack.Count == 1;
IUndoableAction action = m_redoStack[0];
m_redoStack.RemoveAt(0);
action.Do();
m_undoStack.Insert(0, action);
if (anyUndosChange)
{
this.RaisePropertiesChanged(nameof(AnyUndos));
}
else if (anyRedosChange)
{
this.RaisePropertiesChanged(nameof(AnyRedos));
}
return(true);
}
public IAction Redo()
{
if (redoStack.Count > 0)
{
IUndoableAction action = null;
while (redoStack.Count > 0)
{
action = redoStack.Pop();
Logger.Log(LOGKEY, "redo action: " + action.ToString());
if (BeforePerformAction != null)
{
var arg = new ActionEventArgs(action, ActionBehavior.Redo);
BeforePerformAction(this, arg);
if (arg.Cancel)
{
break;
}
}
action.Do();
undoStack.Add(action);
if (AfterPerformAction != null)
{
AfterPerformAction(this, new ActionEventArgs(action, ActionBehavior.Redo));
}
if (!(action is ISerialUndoAction))
{
break;
}
}
return(action);
}
else
{
return(null);
}
}
/// <summary>
/// Executes an action (calls <see cref="IUndoableAction.Do"/>) and then adds it to the stack for management
/// </summary>
public void ExecuteAction(IUndoableAction action)
{
action.Do();
this.AddAction(action);
}