// Line returns a specific line by given type and line number in a section.
public DiffLine Line(DiffLineType typ, int line)
{
var difference = 0;
var addCount = 0;
var delCount = 0;
DiffLine matchedDiffLine = null;
foreach (var item in this.Lines)
{
switch (item.Type)
{
case DiffLineType.DiffLineAdd:
addCount++;
break;
case DiffLineType.DiffLineDelete:
delCount++;
break;
default:
if (matchedDiffLine != null)
{
if (addCount == delCount)
{
return(matchedDiffLine);
}
throw new Exception("diff line error");
}
difference = item.RightLine - item.LeftLine;
addCount = 0;
delCount = 0;
break;
}
switch (typ)
{
case DiffLineType.DiffLineDelete:
if (item.RightLine == 0 && item.LeftLine == line - difference)
{
matchedDiffLine = item;
}
break;
case DiffLineType.DiffLineAdd:
if (item.LeftLine == 0 && item.RightLine == line + difference)
{
matchedDiffLine = item;
}
break;
}
}
if (addCount == delCount)
{
return(matchedDiffLine);
}
throw new Exception("diff line error");
}
public DiffTextLine(string text, DiffLineType changeType)
{
Runs = new List <ITextRun>
{
new TextRun(text)
};
ChangeType = changeType;
foreach (var run in Runs)
{
Length += run.Text.Length;
}
}
public DiffLine(int left, string lefttext, int right, string righttext, DiffLineType type)
{
Type = DiffLineType.None;
LeftLineNumber = left;
LeftLineText = lefttext;
RightLineNumber = right;
RightLineText = righttext;
if (type == DiffLineType.Change)
Type = type;
else if (left > 0 && right < 0)
Type = DiffLineType.Delete;
else if (left < 0 && right > 0)
Type = DiffLineType.Add;
}
public static DiffTextModel GenerateUnifiedDiff(List <Diff> diffs)
{
// Generate the model
DiffTextModel textModel = new();
int beforeLineNo = 1;
int afterLineNo = 1;
foreach (Diff d in diffs)
{
DiffLineType diffType = DiffLineType.Empty;
switch (d.operation)
{
case Operation.DELETE:
{
diffType = DiffLineType.Remove;
}
break;
case Operation.EQUAL:
{
diffType = DiffLineType.Unchanged;
}
break;
case Operation.INSERT:
{
diffType = DiffLineType.Insert;
}
break;
}
string[] splitLines = d.text.TrimEnd('\n').Split('\n');
if (splitLines.Length > 0)
{
for (int i = 0; i < splitLines.Length; i++)
{
bool useBeforeLineNo = true;
bool useAfterLineNo = true;
switch (d.operation)
{
case Operation.DELETE:
{
useAfterLineNo = false;
}
break;
case Operation.INSERT:
{
useBeforeLineNo = false;
}
break;
case Operation.EQUAL:
default:
break;
}
DiffTextLine newLine = new DiffTextLine(splitLines[i], diffType)
{
BeforeLineNo = useBeforeLineNo ? beforeLineNo++ : -1,
LineNo = useAfterLineNo ? afterLineNo++ : -1
};
textModel.InsertLine(newLine);
}
}
}
return(textModel);
}
private DiffLine(string line, DiffLineType lineType)
{
_line = line;
_lineType = lineType;
}
private DiffLine(string line, DiffLineType lineType)
{
_line = line;
_lineType = lineType;
}
