public static IEnumerable <DiffHunk> GetDiff(this IReadonlyTextDocument document, IReadonlyTextDocument changedDocument, bool includeEol = true)
{
if (document == null)
{
throw new ArgumentNullException("document");
}
if (changedDocument == null)
{
throw new ArgumentNullException("changedDocument");
}
var codeDictionary = new Dictionary <string, int>();
int codeCounter = 0;
var options = new DiffOptions(includeEol);
return(Diff.GetDiff <int>(GetDiffCodes(document, ref codeCounter, codeDictionary, options),
GetDiffCodes(changedDocument, ref codeCounter, codeDictionary, options)));
}
static int[] GetDiffCodes(IReadonlyTextDocument document, ref int codeCounter, Dictionary <string, int> codeDictionary, DiffOptions options)
{
int i = 0;
var result = new int[document.LineCount];
foreach (var line in document.GetLinesStartingAt(1))
{
string lineText = document.GetTextAt(line.Offset, options.IncludeEol ? line.LengthIncludingDelimiter : line.Length);
if (options.TrimLines)
{
lineText = lineText.Trim();
}
int curCode;
if (!codeDictionary.TryGetValue(lineText, out curCode))
{
codeDictionary[lineText] = curCode = ++codeCounter;
}
result[i] = curCode;
i++;
}
return(result);
}