public IReadOnlyList <DocumentChange> ReplaceCode()
{
var lcs = LongestCommonSequence <Line> .Find(_oldLines, _newLines, LcsEqualityComparer);
var edits = new List <DocumentChange>();
foreach (var diff in lcs)
{
if (diff.NewLength == 0)
{
edits.Add(Delete(diff.OldStart, diff.OldEnd));
}
else if (diff.OldLength == 0)
{
edits.Add(Insert(diff.OldStart, diff.NewStart, diff.NewEnd));
}
else
{
var length = Math.Min(diff.NewLength, diff.OldLength);
for (var i = 0; i < length; i++)
{
edits.Add(Replace(diff.OldStart + i, diff.NewStart + i));
}
if (diff.OldLength > length)
{
edits.Add(Delete(diff.OldStart + length, diff.OldEnd));
}
else if (diff.NewLength > length)
{
edits.Add(Insert(diff.OldStart + length, diff.NewStart + length, diff.NewEnd));
}
}
}
if (_start.Column > 1)
{
foreach (var e in edits)
{
if (e.ReplacedSpan.End.Line == _start.Line)
{
e.ReplacedSpan = new SourceSpan(e.ReplacedSpan.Start, e.ReplacedSpan.End.AddColumns(_start.Column - 1));
}
if (e.ReplacedSpan.Start.Line == _start.Line)
{
e.ReplacedSpan = new SourceSpan(e.ReplacedSpan.Start.AddColumns(_start.Column - 1), e.ReplacedSpan.End);
}
}
}
return(edits.AsReadOnly());
}
public IReadOnlyList <DocumentChange> ReplaceCode()
{
var lcs = LongestCommonSequence <Line> .Find(_oldLines, _newLines, LcsEqualityComparer);
var edits = new List <DocumentChange>();
foreach (var diff in lcs)
{
if (diff.NewLength == 0)
{
edits.Add(Delete(diff.OldStart, diff.OldEnd));
}
else if (diff.OldLength == 0)
{
edits.Add(Insert(diff.OldStart, diff.NewStart, diff.NewEnd));
}
else
{
var length = Math.Min(diff.NewLength, diff.OldLength);
for (var i = 0; i < length; i++)
{
edits.Add(Replace(diff.OldStart + i, diff.NewStart + i));
}
if (diff.OldLength > length)
{
edits.Add(Delete(diff.OldStart + length, diff.OldEnd));
}
else if (diff.NewLength > length)
{
edits.Add(Insert(diff.OldStart + length, diff.NewStart + length, diff.NewEnd));
}
}
}
return(edits.AsReadOnly());
}