private static int SkipWhileForward(IReadOnlyLineView lineView,
int start, Predicate <char> predicate)
{
int pos;
for (pos = start; pos < lineView.Length; pos++)
{
char symbol = lineView[pos];
if (!predicate(symbol))
{
break;
}
}
return(pos);
}
private static int SkipWhileBackward(IReadOnlyLineView lineView,
int start, Predicate <char> predicate)
{
int pos;
for (pos = start; pos >= 0; pos--)
{
char symbol = lineView[pos];
if (!predicate(symbol))
{
break;
}
}
return(pos);
}
public int FindNextPosition(IReadOnlyLineView lineView)
{
if (lineView.Position >= lineView.Length - 1)
{
return(lineView.Length);
}
int nextPos = lineView.Position + 1;
char nextSymbol = lineView[nextPos];
if (IsWhitespace(nextSymbol))
{
nextPos = SkipWhileForward(lineView, nextPos, IsWhitespace);
return(SkipWhileForward(lineView, nextPos, NotWhitespace));
}
else
{
return(SkipWhileForward(lineView, nextPos, NotWhitespace));
}
}
public int FindPrevPosition(IReadOnlyLineView lineView)
{
if (lineView.Position == 0)
{
return(0);
}
int prevPos = lineView.Position - 1;
char prevSymbol = lineView[prevPos];
if (IsWhitespace(prevSymbol))
{
prevPos = SkipWhileBackward(lineView, prevPos, IsWhitespace);
return(SkipWhileBackward(lineView, prevPos, NotWhitespace) + 1);
}
else
{
return(SkipWhileBackward(lineView, prevPos, NotWhitespace) + 1);
}
}
