/// <summary>
/// Builds a compacted diff from this instance. Compacted diff has multiple subsequent untouched lines
/// squashed into a single ellipsis line.
/// </summary>
/// <returns></returns>
public UnifiedDiffViewModel GetCompactedDiff()
{
var model = new UnifiedDiffViewModel();
// number of unchanged lines around the change that should be kept.
const int unchangedWrappingLines = 3;
var lastLineAdded = -1;
var lines = new List<Line>();
// number of lines left to append when the changed section is left.
var postChangeWrapperLinesLeft = 0;
for (int i = 0; i < Lines.Count; i++)
{
// change found
var currentLine = Lines[i];
if (currentLine.LineType != Diff.EditType.Unchanged)
{
// previous line was unchanged - adding wrapper
if (i > 0 && Lines[i - 1].LineType == Diff.EditType.Unchanged)
{
// taking unchangedWrappingLines before first changed line
var firstWrappingLine = Math.Max(0, i - unchangedWrappingLines);
// making sure we don't grab a line we already added
firstWrappingLine = Math.Max(lastLineAdded + 1, firstWrappingLine);
for (int wrapperIndex = firstWrappingLine; wrapperIndex < i; wrapperIndex++)
{
lines.Add(Lines[wrapperIndex]);
}
}
lines.Add(currentLine);
lastLineAdded = i;
// how many unchanged lines we want to append after we append all changed lines.
postChangeWrapperLinesLeft = unchangedWrappingLines;
}
else
{
if (postChangeWrapperLinesLeft > 0)
{
lines.Add(currentLine);
postChangeWrapperLinesLeft -= 1;
lastLineAdded = i;
}
}
}
model.Lines.AddRange(lines);
return model;
}
public ChangeViewModel(RepositoryNavigationRequest request, Change change, Diff diff)
: base(request)
{
Change = change;
Treeish = change.ComparedCommit.Hash;
Name = System.IO.Path.GetFileName(change.Path);
Path = change.Path;
Diff = new UnifiedDiffViewModel(diff);
Summary = new SummaryViewModel();
Summary.Inserts = Diff.Lines.Count(x =>
x.LineType == GitSharp.Diff.EditType.Inserted ||
(x.LineType == GitSharp.Diff.EditType.Replaced && x.LineB.HasValue) // new ones
);
Summary.Deletes = Diff.Lines.Count(x =>
x.LineType == GitSharp.Diff.EditType.Deleted ||
(x.LineType == GitSharp.Diff.EditType.Replaced && x.LineA.HasValue) // replaced with new one(s)
);
}
private UnifiedDiffViewModel(UnifiedDiffViewModel other)
: this()
{
Lines.AddRange(other.Lines);
}
