private IEnumerable <Expression> FindExpressions(int rangeStart, int rangeEnd)
{
List <Expression> results = new List <Expression>();
Queue <Expression> targets = new Queue <Expression>();
foreach (Expression subExpression in Tree.Root.Statements)
{
targets.Enqueue(subExpression);
}
while (targets.Count > 0)
{
Expression current = targets.Dequeue();
if (rangeStart >= current.EndToken.End)
{
continue;
}
if (rangeEnd <= current.StartToken.Start)
{
continue;
}
results.Add(current);
foreach (Expression subExpression in current.GetSubExpressions())
{
targets.Enqueue(subExpression);
}
}
return(results);
}
private bool ApplyOverlap(Expression expression, int start, int end, VisualLine visualLine)
{
if (expression.StartToken.Start >= end)
{
return(false);
}
if (expression.EndToken.End <= start)
{
return(true);
}
int overlapStart = Math.Max(start, expression.StartToken.Start);
int overlapEnd = Math.Min(end, expression.EndToken.End);
int offset = visualLine.FirstDocumentLine.Offset;
overlapStart = visualLine.GetVisualColumn(overlapStart - offset);
overlapEnd = visualLine.GetVisualColumn(overlapEnd - offset);
IEnumerable <IColorizerElement <Expression> > elements = Elements
.Where(x => x.CanApply(expression));
void ApplyColorizerElements(VisualLineElement lineElement)
{
foreach (IColorizerElement <Expression> colorizerElement in elements)
{
colorizerElement.Apply(lineElement, expression);
}
}
if (elements.Count() > 0)
{
ChangeVisualElements(overlapStart, overlapEnd, ApplyColorizerElements);
}
return(true);
}
