protected void OnRebase()
        {
            VersionControlItem              vcitem   = GetItems()[0];
            MercurialRepository             repo     = ((MercurialRepository)vcitem.Repository);
            Dictionary <string, BranchType> branches = repo.GetKnownBranches(vcitem.Path);
            string defaultBranch = string.Empty,
                   localPath     = vcitem.IsDirectory? (string)vcitem.Path.FullPath: Path.GetDirectoryName(vcitem.Path.FullPath);

            foreach (KeyValuePair <string, BranchType> branch in branches)
            {
                if (BranchType.Parent == branch.Value)
                {
                    defaultBranch = branch.Key;
                    break;
                }
            }            // check for parent branch

            Dialogs.BranchSelectionDialog bsd = new Dialogs.BranchSelectionDialog(branches.Keys, defaultBranch, localPath, false, true, true, false);
            try {
                if ((int)Gtk.ResponseType.Ok == bsd.Run() && !string.IsNullOrEmpty(bsd.SelectedLocation))
                {
                    MercurialTask worker = new MercurialTask();
                    worker.Description = string.Format("Rebasing on {0}", bsd.SelectedLocation);
                    worker.Operation   = delegate { repo.Rebase(bsd.SelectedLocation, vcitem.Path, bsd.SaveDefault, bsd.Overwrite, worker.ProgressMonitor); };
                    worker.Start();
                }
            } finally {
                bsd.Destroy();
            }
        }        // OnRebase
        protected void OnMercurialPublish()
        {
            VersionControlItem              vcitem   = GetItems()[0];
            MercurialRepository             repo     = ((MercurialRepository)vcitem.Repository);
            Dictionary <string, BranchType> branches = repo.GetKnownBranches(vcitem.Path);
            string defaultBranch = string.Empty,
                   localPath     = vcitem.IsDirectory? (string)vcitem.Path.FullPath: Path.GetDirectoryName(vcitem.Path.FullPath);

            if (repo.IsModified(MercurialRepository.GetLocalBasePath(vcitem.Path.FullPath)))
            {
                MessageDialog md = new MessageDialog(MonoDevelop.Ide.IdeApp.Workbench.RootWindow, DialogFlags.Modal,
                                                     MessageType.Question, ButtonsType.YesNo,
                                                     GettextCatalog.GetString("You have uncommitted local changes. Push anyway?"));
                try {
                    if ((int)ResponseType.Yes != md.Run())
                    {
                        return;
                    }
                } finally {
                    md.Destroy();
                }
            }            // warn about uncommitted changes

            foreach (KeyValuePair <string, BranchType> branch in branches)
            {
                if (BranchType.Parent == branch.Value)
                {
                    defaultBranch = branch.Key;
                    break;
                }
            }            // check for parent branch

            Dialogs.BranchSelectionDialog bsd = new Dialogs.BranchSelectionDialog(branches.Keys, defaultBranch, localPath, false, true, true, true);
            try {
                if ((int)Gtk.ResponseType.Ok == bsd.Run() && !string.IsNullOrEmpty(bsd.SelectedLocation))
                {
                    MercurialTask worker = new MercurialTask();
                    worker.Description = string.Format("Pushing to {0}", bsd.SelectedLocation);
                    worker.Operation   = delegate { repo.Push(bsd.SelectedLocation, vcitem.Path, bsd.SaveDefault, bsd.Overwrite, bsd.OmitHistory, worker.ProgressMonitor); };
                    worker.Start();
                }
            } finally {
                bsd.Destroy();
            }
        }        // OnPublish