UnitResult Repeat()
{
var unit = globallyRepeatableUnits.Peek();
if (!unit.Repeatable)
{
return(UnitResult.NoUnit);
}
var eventArgs = new CancellableUndoServiceEventArgs(unit);
OnExecuting(eventArgs);
if (eventArgs.Cancel)
{
return(UnitResult.Cancelled);
}
globallyRedoableUnits.Clear();
globallyRepeatableUnits.AddLast(unit);
var undoableUnit = unit as IUndoableUnit;
if (undoableUnit != null)
{
globallyUndoableUnits.AddLast(undoableUnit);
}
else
{
globallyUndoableUnits.Clear();
globallyRedoableUnits.Clear();
}
var result = unit.PerformUnit(unit.Argument, UnitMode.Repeat);
OnExecuted(new UndoServiceEventArgs(unit));
return(result);
}
