/// <summary>
/// Returns the difference between two sets of lines
/// </summary>
public DiffResult GetDiff(IList <HtmlLine> newLines, IList <HtmlLine> oldLines, bool ignoreSmallChanges)
{
IList <LineDiff> changes = GetDiffLines(newLines, oldLines);
IList <LineDiff> addedDiffs = new List <LineDiff>();
IList <LineDiff> removedDiffs = new List <LineDiff>();
ISet <string> uniqueInserts = new HashSet <string>();
ISet <string> uniqueDeletes = new HashSet <string>();
foreach (LineDiff change in changes)
{
HtmlLine textLine = change.Line;
string origText = textLine.Text?.Trim();
if (string.IsNullOrWhiteSpace(origText))
{
continue;
}
if (change.Operation == DiffType.Insert)
{
// ensure no duplication
if (!uniqueInserts.Add(origText))
{
continue;
}
if (ignoreSmallChanges)
{
// ignore short change
if (origText.Length < 10)
{
continue;
}
}
addedDiffs.Add(change);
}
else if (change.Operation == DiffType.Delete)
{
// ensure no duplication
if (!uniqueDeletes.Add(origText))
{
continue;
}
if (ignoreSmallChanges)
{
// ignore short change
if (origText.Length < 10)
{
continue;
}
}
removedDiffs.Add(change);
}
}
return(new DiffResult(addedDiffs, removedDiffs));
}
public LineDiff(DiffType operation, HtmlLine line)
{
Operation = operation;
Line = line;
}