public static List <TextSpan> GetAlignedTextSpan(int escapeLength, List <TextSpan> foldedTextSpans, List <TextSpan> matchesLocations, int startOffset)
{
List <TextSpan> result = new List <TextSpan>(matchesLocations.Count);
foreach (TextSpan location in matchesLocations)
{
if (foldedTextSpans == null || foldedTextSpans.Count == 0)
{
result.Add(location.AddOffset(startOffset));
continue;
}
int offset = 0;
int leftBound = 1;
int rightBound =
foldedTextSpans[0].Length - 2 * escapeLength + 1; // - quotes length and then + 1
TextSpan textSpan = TextSpan.Zero;
// Check first initial textspan separately
if (location.Start < rightBound && location.End > rightBound)
{
textSpan = location;
}
for (int i = 1; i < foldedTextSpans.Count; i++)
{
var initTextSpan = foldedTextSpans[i];
var prevTextSpan = foldedTextSpans[i - 1];
leftBound += prevTextSpan.Length - 2 * escapeLength;
rightBound += initTextSpan.Length - 2 * escapeLength;
offset += initTextSpan.Start - prevTextSpan.End + 2 * escapeLength;
if (location.Start < leftBound && location.End < leftBound)
{
break;
}
if (location.Start >= leftBound && location.Start < rightBound)
{
textSpan = location.AddOffset(offset);
if (location.End <= rightBound)
{
result.Add(textSpan.AddOffset(startOffset));
break;
}
}
if (!textSpan.IsZero && location.End <= rightBound)
{
result.Add(new TextSpan(textSpan.Start + startOffset, location.Length + offset, textSpan.File));
break;
}
}
if (textSpan.IsZero)
{
result.Add(location.AddOffset(startOffset));
}
}
return(result);
}
