/// ------------------------------------------------------------------------------------
public bool TryUpdate(SegmentChange newChange)
{
if (NewRange == newChange.OriginalRange && newChange.Type == SegmentChangeType.EndBoundaryMoved)
{
NewRange = newChange.NewRange;
return(true);
}
if (newChange.Type == SegmentChangeType.Addition && Type == SegmentChangeType.AnnotationAdded &&
newChange.NewRange == OriginalRange)
{
_type = SegmentChangeType.Addition;
Action <SegmentChange> originalUndoAction = UndoAction;
UndoAction = c => { originalUndoAction(c); newChange.UndoAction(c); };
return(true);
}
if (newChange.Type == SegmentChangeType.AnnotationDeleted && Type == SegmentChangeType.AnnotationDeleted &&
newChange.NewRange == OriginalRange)
{
Action <SegmentChange> originalUndoAction = UndoAction;
UndoAction = c => { originalUndoAction(c); newChange.UndoAction(c); };
return(true);
}
if (newChange.Type == SegmentChangeType.Addition && Type == SegmentChangeType.AnnotationDeleted &&
newChange.NewRange.Start == OriginalRange.Start)
{
Action <SegmentChange> originalUndoAction = UndoAction;
UndoAction = c => { originalUndoAction(c); newChange.UndoAction(c); };
return(true);
}
return(false);
}
/// ------------------------------------------------------------------------------------
public SegmentChange(SegmentChangeType type, TimeRange originalRange,
TimeRange newRange, Action <SegmentChange> undoAction)
{
_type = type;
_originalRange = originalRange;
NewRange = newRange;
UndoAction = undoAction;
}
