/// <summary>
/// Creates a patch from the PatchMessage sent by the client.
/// Then applies the patch to the ShadowCopy followed by applying the patch to the live server copy.
/// Then creates new diffs from the live server text and the shadow (which contains the exact copy of latest client message).
/// These diffs will then be send to the client so that the client now has the latest updates.
/// </summary>
/// <param name="message"></param>
private void HandlePatchMessage(PatchMessage message)
{
_edits.Clear();
Edit edit = message.Edits.Pop();
Task.Factory.StartNew(() =>
{
if (edit.ClientVersion > User.Document.ShadowCopy.ClientVersion || edit.ClientVersion == 0)
{
// Update Server Shadow
bool success;
List <Patch> patches;
try
{
patches = _dmp.patch_make(User.Document.ShadowCopy.ShadowText, edit.Diffs);
User.Document.ShadowCopy.ShadowText =
_dmp.patch_apply(patches, User.Document.ShadowCopy.ShadowText)[0].ToString();
//User.Document.ShadowCopy.ClientVersion++;
User.Document.BackupShadowCopy.BackupText = User.Document.ShadowCopy.ShadowText;
success = true;
}
catch (ArgumentOutOfRangeException e)
{
Console.WriteLine(e);
success = false;
Session.BroadCastOutOfSyncResponse(Session.Document.CurrentText);
}
if (success)
{
// Update Server Current
patches = _dmp.patch_make(Session.Document.CurrentText, edit.Diffs);
Session.Document.CurrentText =
_dmp.patch_apply(patches, Session.Document.CurrentText)[0].ToString();
Console.WriteLine(
$"Updated client: {User.Username}, With test: {Session.Document.CurrentText}");
}
}
}).ContinueWith((result) =>
{
List <Diff> diffs = _dmp.diff_main(User.Document.ShadowCopy.ShadowText, Session.Document.CurrentText,
false);
_dmp.diff_cleanupEfficiency(diffs);
_edits.Push(new Edit(diffs, User.Document.ShadowCopy.ClientVersion,
User.Document.ShadowCopy.ServerVersion));
SendMessage(new PatchMessage("Server", _edits));
User.Document.ShadowCopy.ShadowText = Session.Document.CurrentText;
_edits.Clear();
});
}
private static string GetPrettyHtmlDiff(string text1, string text2)
{
if (text1 == null)
{
text1 = "";
}
if (text2 == null)
{
text2 = "";
}
var diffs = Dmp.diff_main(text1, text2);
Dmp.diff_cleanupSemantic(diffs);
return(Dmp.diff_prettyHtml(diffs));
}
private void PopulateObjectDefinitions(string objDefSource, string objDefTarget, ComparisonObjectType objType, ComparisonObjectStatus objStatus)
{
try
{
IterateJson(txtSourceObjectDefinition, objDefSource);
IterateJson(txtTargetObjectDefinition, objDefTarget);
}
catch (Exception)
{
txtSourceObjectDefinition.Text = "";
txtSourceObjectDefinition.Text = objDefSource;
txtTargetObjectDefinition.Text = "";
txtTargetObjectDefinition.Text = objDefTarget;
}
#region Difference Highlighting
if (objStatus == ComparisonObjectStatus.DifferentDefinitions ||
(objStatus == ComparisonObjectStatus.SameDefinition && objType == ComparisonObjectType.Perspective && _comparisonInfo.OptionsInfo.OptionMergePerspectives) ||
(objStatus == ComparisonObjectStatus.SameDefinition && objType == ComparisonObjectType.Culture && _comparisonInfo.OptionsInfo.OptionMergeCultures)
)
{
_diffs = _diff.diff_main(objDefSource, objDefTarget);
_diff.diff_cleanupSemantic(_diffs);
//_diff.diff_cleanupSemanticLossless(_diffs);
//_diff.diff_cleanupEfficiency(_diffs);
// NG: Evaluate if this needs to be added
//Are we merging perspectives/cultures?
if ((objType == ComparisonObjectType.Perspective && _comparisonInfo.OptionsInfo.OptionMergePerspectives) ||
(objType == ComparisonObjectType.Culture && _comparisonInfo.OptionsInfo.OptionMergeCultures)
)
{
_chunklistSource = CollectChunks(source: true, backColors: _backColorsMerge);
_chunklistTarget = CollectChunks(source: false, backColors: _backColorsMerge);
//If same definition with merge perspectives/cultures option, just want to highlight differences in target that will not be applied, so do not paint chunks for source
if (objStatus == ComparisonObjectStatus.DifferentDefinitions)
{
PaintChunks(txtSourceObjectDefinition, _chunklistSource);
}
PaintChunks(txtTargetObjectDefinition, _chunklistTarget);
}
else
{
_chunklistSource = CollectChunks(source: true, backColors: _backColors);
_chunklistTarget = CollectChunks(source: false, backColors: _backColors);
PaintChunks(txtSourceObjectDefinition, _chunklistSource);
PaintChunks(txtTargetObjectDefinition, _chunklistTarget);
}
}
#endregion
//select 1st characters so not scrolled at bottom
if (txtSourceObjectDefinition.Text != "")
{
txtSourceObjectDefinition.SelectionStart = 0;
txtSourceObjectDefinition.SelectionLength = 0;
txtSourceObjectDefinition.ScrollToCaret();
}
if (txtTargetObjectDefinition.Text != "")
{
txtTargetObjectDefinition.SelectionStart = 0;
txtTargetObjectDefinition.SelectionLength = 0;
txtTargetObjectDefinition.ScrollToCaret();
}
}
/// <summary>
/// An array of differences is computed which describe the transformation of text1 into text2.
/// Each difference is an array of Diff objects. The first element specifies if it is an insertion (1),
/// a deletion (-1) or an equality (0). The second element specifies the affected text.
/// </summary>
public void Diff(string text1, string text2)
{
DiffMatchPatch diffMatchPatch = CreateDiffMatchPatch();
diffs = diffMatchPatch.diff_main(text1, text2);
}