FairyGUI.Relations.AddItems C# (CSharp) Method

        void AddItems(GObject target, string sidePairs)
        {
            RelationItem newItem = new RelationItem(_owner);
            newItem.target = target;

            int start = 0;
            int end = 0;
            int ms;
            int c1;
            int c2;
            bool usePercent;
            RelationType tid;
            //0 gc 解析版本
            while (end < sidePairs.Length)
            {
                start = end;
                end = sidePairs.IndexOf(",", start);
                if (end == -1)
                    end = sidePairs.Length;
                usePercent = sidePairs[end - 1] == '%';
                ms = sidePairs.IndexOf('-', start, end-start);
                end++;
                if (ms != -1)
                {
                    c1 = ((int)sidePairs[start]);
                    c2 = ((int)sidePairs[ms + 1]);
                }
                else
                {
                    c1 = ((int)sidePairs[start]);
                    c2 = c1;
                }

                switch (c1)
                {
                    case 119://width
                        tid = RelationType.Width;
                        break;

                    case 104://height
                        tid = RelationType.Height;
                        break;

                    case 109://middle
                        tid = RelationType.Middle_Middle;
                        break;

                    case 99://center
                        tid = RelationType.Center_Center;
                        break;

                    case 108: //left
                        if (ms - start > 4) //leftext
                        {
                            if (c2 == 108)
                                tid = RelationType.LeftExt_Left;
                            else
                                tid = RelationType.LeftExt_Right;
                        }
                        else
                        {
                            switch (c2)
                            {
                                case 108:
                                    tid = RelationType.Left_Left;
                                    break;

                                case 114:
                                    tid = RelationType.Left_Right;
                                    break;

                                case 99:
                                    tid = RelationType.Left_Center;
                                    break;

                                default:
                                    throw new ArgumentException("invalid relation type: " + sidePairs);
                            }
                        }
                        break;

                    case 114: //right
                        if (ms - start > 5) //rightext
                        {
                            if (c2 == 108)
                                tid = RelationType.RightExt_Left;
                            else
                                tid = RelationType.RightExt_Right;
                        }
                        else
                        {
                            switch (c2)
                            {
                                case 108:
                                    tid = RelationType.Right_Left;
                                    break;

                                case 114:
                                    tid = RelationType.Right_Right;
                                    break;

                                case 99:
                                    tid = RelationType.Right_Center;
                                    break;

                                default:
                                    throw new ArgumentException("invalid relation type: " + sidePairs);
                            }
                        }
                        break;

                    case 116://top
                        if (ms - start > 3) //topext
                        {
                            if (c2 == 116)
                                tid = RelationType.TopExt_Top;
                            else
                                tid = RelationType.TopExt_Bottom;
                        }
                        else
                        {
                            switch (c2)
                            {
                                case 116:
                                    tid = RelationType.Top_Top;
                                    break;

                                case 98:
                                    tid = RelationType.Top_Bottom;
                                    break;

                                case 109:
                                    tid = RelationType.Top_Middle;
                                    break;

                                default:
                                    throw new ArgumentException("invalid relation type: " + sidePairs);
                            }
                        }
                        break;

                    case 98://bottom
                        if (ms - start > 6) //bottomext
                        {
                            if (c2 == 116)
                                tid = RelationType.BottomExt_Top;
                            else
                                tid = RelationType.BottomExt_Bottom;
                        }
                        else
                        {
                            switch (c2)
                            {
                                case 116:
                                    tid = RelationType.Bottom_Top;
                                    break;

                                case 98:
                                    tid = RelationType.Bottom_Bottom;
                                    break;

                                case 109:
                                    tid = RelationType.Bottom_Middle;
                                    break;

                                default:
                                    throw new ArgumentException("invalid relation type: " + sidePairs);
                            }
                        }
                        break;

                    default:
                        throw new ArgumentException("invalid relation type: " + sidePairs);
                }

                newItem.InternalAdd(tid, usePercent);
            }

            _items.Add(newItem);
        }