public void GotoPrev()
        {
            if (this.Diff == null)
            {
                return;
            }
            MainEditor.GrabFocus();

            int line = MainEditor.Caret.Line;
            int min = Int32.MaxValue, searched = Int32.MaxValue;

            foreach (var hunk in this.LeftDiff)
            {
                min = System.Math.Min(hunk.InsertStart, min);
                if (hunk.InsertStart > line)
                {
                    searched = System.Math.Min(hunk.InsertStart, searched);
                }
            }
            if (min < Int32.MaxValue)
            {
                MainEditor.Caret.Line = searched == Int32.MaxValue ? min : searched;
                MainEditor.CenterToCaret();
            }
        }
        public void GotoNext()
        {
            if (this.Diff == null)
            {
                return;
            }
            MainEditor.GrabFocus();

            int line = MainEditor.Caret.Line;
            int max = -1, searched = -1;

            foreach (var hunk in LeftDiff)
            {
                max = System.Math.Max(hunk.InsertStart, max);
                if (hunk.InsertStart < line)
                {
                    searched = System.Math.Max(hunk.InsertStart, searched);
                }
            }
            if (max >= 0)
            {
                MainEditor.Caret.Line = searched < 0 ? max : searched;
                MainEditor.CenterToCaret();
            }
        }