/// <summary>
/// Trim excessive inaccessible text.
/// </summary>
private static void TrimInaccessibleText(ArrayBuilder <SourceText> segments)
{
ComputeLengthAndStorageSize(segments, out int length, out int size);
// if more than half of the storage is unused, compress into a single new segment
if (length < size / 2)
{
Encoding encoding = segments[0].Encoding;
SourceHashAlgorithm algorithm = segments[0].ChecksumAlgorithm;
SourceTextWriter writer = SourceTextWriter.Create(encoding, algorithm, length);
foreach (SourceText segment in segments)
{
segment.Write(writer);
}
segments.Clear();
segments.Add(writer.ToSourceText());
}
}
/// <summary>
/// Combines contiguous segments with lengths that are each less than or equal to the specified segment size.
/// </summary>
private static void CombineSegments(ArrayBuilder <SourceText> segments, int segmentSize)
{
for (int i = 0; i < segments.Count - 1; i++)
{
if (segments[i].Length <= segmentSize)
{
int combinedLength = segments[i].Length;
// count how many contiguous segments are reducible
int count = 1;
for (int j = i + 1; j < segments.Count; j++)
{
if (segments[j].Length <= segmentSize)
{
count++;
combinedLength += segments[j].Length;
}
}
// if we've got at least two, then combine them into a single text
if (count > 1)
{
var encoding = segments[i].Encoding;
var algorithm = segments[i].ChecksumAlgorithm;
var writer = SourceTextWriter.Create(encoding, algorithm, combinedLength);
while (count > 0)
{
segments[i].Write(writer);
segments.RemoveAt(i);
count--;
}
var newText = writer.ToSourceText();
segments.Insert(i, newText);
}
}
}
}
