public void RedoOne(object[] actors)
{
this.VerifyWriterLock();
try {
for (int i = this.m_RedoStack.Count; --i >= 0;)
{
if (!ActorsMatch(actors, ((IUndoer)this.m_RedoStack[i]).Actors))
{
continue;
}
IUndoer undoer = ((IUndoer)this.m_RedoStack[i]);
this.m_RedoStack.RemoveAt(i);
try {
undoer.Redo();
} catch {
ClearStack(this.m_RedoStack, actors);
throw;
}
this.m_UndoStack.Add(undoer);
return;
}
} finally {
if (this.Update != null)
{
this.Update(this, EventArgs.Empty);
}
}
throw new InvalidOperationException("Cannot undo unless IsUndoable returns true.");
}
public void Push(IUndoer undoer)
{
this.VerifyWriterLock();
this.m_UndoStack.Add(undoer);
// If action A is undone, and action B is performed, then action A is no longer valid.
ClearStack(this.m_RedoStack, undoer.Actors);
if (this.Update != null)
{
this.Update(this, EventArgs.Empty);
}
}
public void Push(IUndoer undoer)
{
this.VerifyWriterLock();
this.m_UndoStack.Add(undoer);
// If action A is undone, and action B is performed, then action A is no longer valid.
ClearStack(this.m_RedoStack, undoer.Actors);
if(this.Update != null)
this.Update(this, EventArgs.Empty);
}