private static void MoveUnitBounded(MarkupPointer p, MoveDirection direction, MoveContextFilter continueFilter, MarkupPointer boundary)
{
MarkupPointer p1 = p.Clone();
MarkupPointer lastGoodPosition = p.Clone();
MarkupContext context = new MarkupContext();
MoveFilterResult result = MoveFilterResult.CONTINUE;
while (CheckMoveBoundary(p1, boundary, direction) && result == MoveFilterResult.CONTINUE)
{
lastGoodPosition.MoveToPointer(p1);
MovePointer(p1, direction, context);
result = continueFilter(context);
}
if (result == MoveFilterResult.CONTINUE)
{
//we hit the boundary, so position pointer at the boundary
p1.MoveToPointer(boundary);
}
else if (result == MoveFilterResult.STOP_BACK)
{
p1.MoveToPointer(lastGoodPosition);
}
p.MoveToPointer(p1);
}
public MoveFilterResult MergeContextFilters(MarkupContext mc)
{
foreach (MoveContextFilter filter in _filters)
{
MoveFilterResult result = filter(mc);
if (result != MoveFilterResult.CONTINUE)
{
return(result);
}
}
return(MoveFilterResult.CONTINUE);
}
