GitUI.FormFileHistory.UpdateSelectedFileViewers C# (CSharp) Метод

        private void UpdateSelectedFileViewers()
        {
            var selectedRows = FileChanges.GetRevisions();

            if (selectedRows.Count == 0) return;

            IGitItem revision = selectedRows[0];

            var fileName = revision.Name;

            if (string.IsNullOrEmpty(fileName))
                fileName = FileName;

            Text = string.Format("File History ({0})", fileName);

            if (tabControl1.SelectedTab == Blame)
                blameControl1.LoadBlame(revision.Guid, fileName);
            if (tabControl1.SelectedTab == ViewTab)
            {
                var scrollpos = View.ScrollPos;

                View.ViewGitItemRevision(fileName, revision.Guid);
                View.ScrollPos = scrollpos;
            }

            switch (selectedRows.Count)
            {
                case 1:
                    {
                        IGitItem revision1 = selectedRows[0];

                        if (tabControl1.SelectedTab == DiffTab)
                        {
                            Diff.ViewPatch(
                                () =>
                                {
                                    Patch diff = GitCommands.GitCommands.GetSingleDiff(revision1.Guid, revision1.Guid + "^", fileName,
                                                                          Diff.GetExtraDiffArguments());
                                    if (diff == null)
                                        return string.Empty;
                                    return diff.Text;
                                }
                                );
                        }
                    }
                    break;
                case 2:
                    {
                        IGitItem revision1 = selectedRows[0];
                        IGitItem revision2 = selectedRows[1];

                        if (tabControl1.SelectedTab == DiffTab)
                        {
                            Diff.ViewPatch(
                                () =>
                                GitCommands.GitCommands.GetSingleDiff(revision1.Guid, revision2.Guid, fileName,
                                                                      Diff.GetExtraDiffArguments()).Text);
                        }
                    }
                    break;
                default:
                    Diff.ViewPatch("You need to select 2 files to view diff.");
                    break;
            }
        }