static DiffStringItem[] CreateStringDiffs(DiffItem[] items, string[] lineListA, string[] lineListB)
{
var result = new List <DiffStringItem>();
for (int index = 0; index < items.Length; index++)
{
var item = new DiffStringItem();
item.StartA = items[index].StartA;
item.StartB = items[index].StartB;
item.DeletedA = items[index].DeletedA;
item.InsertedB = items[index].InsertedB;
if (item.InsertedB > 0)
{
item.Inserted = new string[item.InsertedB];
for (int i = 0; i < item.InsertedB; i++)
{
item.Inserted[i] = (string)lineListB[item.StartB + i].Clone();
}
}
else
{
item.Inserted = null;
}
if (item.DeletedA > 0)
{
item.Deleted = new string[item.DeletedA];
for (int i = 0; i < item.DeletedA; i++)
{
item.Deleted[i] = (string)lineListA[item.StartA + i].Clone();
}
}
else
{
item.Deleted = null;
}
if (result.Count > 0)
{
int prevDiffPos = result.Count - 1;
DiffStringItem prevDiff = result[prevDiffPos];
int nonDiffItemStartA = prevDiff.StartA + prevDiff.DeletedA;
int nonDiffItemLengthA = item.StartA - nonDiffItemStartA;
int nonDiffItemStartB = prevDiff.StartB + prevDiff.InsertedB;
int nonDiffItemLengthB = item.StartB - nonDiffItemStartB;
if (EmptyLinesOnly(lineListA, nonDiffItemStartA, nonDiffItemLengthA) && EmptyLinesOnly(lineListB, nonDiffItemStartB, nonDiffItemLengthB))
{
result.Add(GlueDiffStringItems(prevDiff, item, lineListA, lineListB));
result.RemoveAt(prevDiffPos);
continue;
}
}
result.Add(item);
}
return(result.ToArray());
}
static DiffStringItem GlueDiffStringItems(DiffStringItem prevDiff, DiffStringItem diff, string[] linesA, string[] linesB)
{
var result = new DiffStringItem();
result.DeletedA = diff.StartA + diff.DeletedA - prevDiff.StartA;
result.Deleted = new string[result.DeletedA];
Array.Copy(linesA, prevDiff.StartA, result.Deleted, 0, result.DeletedA);
result.InsertedB = diff.StartB + diff.InsertedB - prevDiff.StartB;
result.Inserted = new string[result.InsertedB];
Array.Copy(linesB, prevDiff.StartB, result.Inserted, 0, result.InsertedB);
result.StartA = prevDiff.StartA;
result.StartB = prevDiff.StartB;
return(result);
}
