public static bool ApplyPatch(LinePatch patch, List <string> text)
{
int previousIndex = patch.Start1;
foreach (var diff in patch.Diffs)
{
if (diff.Operation.IsEqual)
{
foreach (var line in diff.Lines)
{
if (text[previousIndex] != line)
{
return(false);
}
previousIndex++;
}
}
if (diff.Operation.IsDelete)
{
text.RemoveRange(previousIndex, diff.Lines.Count);
}
if (diff.Operation.IsInsert)
{
text.InsertRange(previousIndex, diff.Lines);
previousIndex += diff.Lines.Count;
}
}
return(true);
}
public static (List <LineDiff> prefix, List <LineDiff> changes, List <LineDiff> suffix) SplitPatchAffix(this LinePatch patch)
{
var prefix = new List <LineDiff>();
var changes = new List <LineDiff>();
var suffix = new List <LineDiff>();
int i = 0;
while (i < patch.Diffs.Count)
{
if (!patch.Diffs[i].Operation.IsEqual)
{
break;
}
prefix.Add(patch.Diffs[i]);
i++;
}
while (i < patch.Diffs.Count)
{
if (patch.Diffs[i].Operation.IsEqual)
{
break;
}
changes.Add(patch.Diffs[i]);
i++;
}
while (i < patch.Diffs.Count)
{
if (!patch.Diffs[i].Operation.IsEqual)
{
break;
}
suffix.Add(patch.Diffs[i]);
i++;
}
Debug.Assert(i == patch.Diffs.Count);
return(prefix, changes, suffix);
}