/// <summary>
/// Get differences between the document's local file and his source control version.
/// </summary>
/// <returns>
/// Collection that contains the result of comparing the document's local file with his source control version.
/// <para/>Each element is a pair of key and value: the key is a line of text, the value is a type of difference.
/// </returns>
private DiffLinesCollection GetChangedLineNumbers()
{
Debug.Assert(_textDoc != null, "_textDoc is null.");
Debug.Assert(_versionControl != null, "_versionControl is null.");
var textSnapshot = _textView.TextSnapshot;
Stream sourceStream = new MemoryStream();
Encoding sourceStreamEncoding = _textDoc.Encoding;
byte[] textBytes = sourceStreamEncoding.GetBytes(textSnapshot.GetText());
sourceStream.Write(textBytes, 0, textBytes.Length);
DiffSummary diffSummary;
lock (_versionControlItemStreamLockObject)
{
diffSummary = GetDifference(
_versionControlItemStream,
Encoding.GetEncoding(_versionControlItem.Encoding),
sourceStream,
sourceStreamEncoding);
}
var dict = new DiffLinesCollection();
for (int i = 0; i < diffSummary.Changes.Length; i++)
{
var diff = new DiffChange(diffSummary.Changes[i]);
if (diff.ChangeType == DiffChangeType.Change)
{
if (diff.OriginalLength >= diff.ModifiedLength)
{
int linesModified = diff.ModifiedLength;
if (linesModified == 0)
{
diff.ChangeType = DiffChangeType.Delete;
int linesDeleted = diff.OriginalLength - diff.ModifiedLength;
Debug.Assert(linesDeleted > 0, "linesDeleted must be greater than zero.");
}
}
else
{
int linesModified = diff.OriginalLength;
if (linesModified == 0)
{
diff.ChangeType = DiffChangeType.Insert;
int linesAdded = diff.ModifiedLength - diff.OriginalLength;
Debug.Assert(linesAdded > 0, "linesAdded must be greater than zero.");
}
}
}
if (diff.ChangeType != DiffChangeType.Delete)
{
for (int k = diff.ModifiedStart; k <= diff.ModifiedEnd; k++)
{
AddLineToDiffLinesCollection(dict, textSnapshot, k, diff);
}
}
else
{
AddLineToDiffLinesCollection(dict, textSnapshot, diff.ModifiedStart, diff);
}
}
return(dict);
}
/// <summary>
/// Get differences between the document's local file and his source control version.
/// </summary>
/// <returns>
/// Collection that contains the result of comparing the document's local file with his source control version.
/// <para/>Each element is a pair of key and value: the key is a line of text, the value is a type of difference.
/// </returns>
private DiffLinesCollection GetChangedLineNumbers()
{
Debug.Assert(_textDoc != null, "_textDoc is null.");
Debug.Assert(_versionControl != null, "_versionControl is null.");
var textSnapshot = _textView.TextSnapshot;
Stream sourceStream = new MemoryStream();
Encoding sourceStreamEncoding = _textDoc.Encoding;
byte[] textBytes = sourceStreamEncoding.GetBytes(textSnapshot.GetText());
sourceStream.Write(textBytes, 0, textBytes.Length);
DiffSummary diffSummary;
lock (_versionControlItemStreamLockObject)
{
diffSummary = GetDifference(
_versionControlItemStream,
Encoding.GetEncoding(_versionControlItem.Encoding),
sourceStream,
sourceStreamEncoding);
}
var dict = new DiffLinesCollection();
for (int i = 0; i < diffSummary.Changes.Length; i++)
{
var diff = new DiffChange(diffSummary.Changes[i]);
if (diff.ChangeType == DiffChangeType.Change)
{
if (diff.OriginalLength >= diff.ModifiedLength)
{
int linesModified = diff.ModifiedLength;
if (linesModified == 0)
{
diff.ChangeType = DiffChangeType.Delete;
int linesDeleted = diff.OriginalLength - diff.ModifiedLength;
Debug.Assert(linesDeleted > 0, "linesDeleted must be greater than zero.");
}
}
else
{
int linesModified = diff.OriginalLength;
if (linesModified == 0)
{
diff.ChangeType = DiffChangeType.Insert;
int linesAdded = diff.ModifiedLength - diff.OriginalLength;
Debug.Assert(linesAdded > 0, "linesAdded must be greater than zero.");
}
}
}
if (diff.ChangeType != DiffChangeType.Delete)
{
for (int k = diff.ModifiedStart; k <= diff.ModifiedEnd; k++)
AddLineToDiffLinesCollection(dict, textSnapshot, k, diff);
}
else
{
AddLineToDiffLinesCollection(dict, textSnapshot, diff.ModifiedStart, diff);
}
}
return dict;
}