1. 1
2. 2
3. 3
4. 4
5. 5
6. 6
7. 7
8. 8
9. 9
10. 10
11. 11
12. 12
13. 13
14. 14
15. 15
16. 16
17. 17
18. 18
19. 19
20. 20
21. 21
22. 22
23. 23
24. 24
25. 25
26. 26
27. 27
28. 28
29. 29
30. 30
31. 31
32. 32
33. 33
34. 34
35. 35
36. 36
37. 37
38. 38
39. 39
40. 40
41. 41
42. 42
43. 43
44. 44
45. 45
46. 46
47. 47
48. 48
49. 49
50. 50
51. 51
52. 52
53. 53
54. 54
55. 55
56. 56
57. 57
58. 58
59. 59
60. 60
61. 61
62. 62
63. 63
64. 64
65. 65
66. 66
67. 67
68. 68
69. 69
70. 70
71. 71

private void CaretNormalize()  {
            if (Template.Terminals.Count == 0) { _sTermEnd = _sOffStart = _sOffEnd = _sTermStart = 0; return; }
            if (_sTermStart == _sTermEnd) {
                if (_sTermStart < 0) _sTermEnd = _sOffStart = _sOffEnd = _sTermStart = 0;
                else if (_sTermEnd > Template.Terminals.Count - 1) {
                    _sTermEnd = _sTermStart = Template.Terminals.Count - 1;
                    _sOffStart = _sOffEnd = Template.Terminals[Template.Terminals.Count - 1].Text.Length;
                }
                else  {
                    if (_sOffStart != _sOffEnd) {
                        var nos = Math.Min(_sOffStart, _sOffEnd);
                        _sOffEnd = Math.Max(_sOffStart, _sOffEnd);
                        _sOffStart = nos;
                        if (_sOffStart < 0)  {
                            _sTermEnd = --_sTermStart;
                            if (_sTermEnd < 0) _sTermStart = _sOffStart = 0; else _sOffStart = Template.Terminals[_sTermEnd].Text.Length - 1;
                        }
                        if (_sOffEnd > Template.Terminals[_sTermEnd].Text.Length - 1) {
                            _sTermEnd = ++_sTermStart;
                            if (_sTermEnd > Template.Terminals.Count - 1)
                            {
                                _sTermEnd = Template.Terminals.Count - 1;
                                _sOffEnd = Template.Terminals[_sTermEnd].Text.Length;
                            }
                            else _sOffEnd = 0;
                        }
                    }
                    else
                    {
                        if (_sOffStart < 0) {
                            _sTermEnd = --_sTermStart;
                            if (_sTermEnd < 0)  _sTermStart = _sOffEnd = _sOffStart = 0; else _sOffEnd = _sOffStart = Template.Terminals[_sTermEnd].Text.Length - 1;
                        }
                        if (_sOffEnd > Template.Terminals[_sTermEnd].Text.Length - 1) {
                            _sTermEnd = ++_sTermStart;
                            if (_sTermEnd > Template.Terminals.Count - 1) {
                                _sTermEnd = Template.Terminals.Count - 1;
                                _sOffEnd = _sOffStart = Template.Terminals[_sTermEnd].Text.Length;
                            } else _sOffEnd = _sOffStart = 0;
                        }
                    }
                }
            } else {
                if (_sTermStart > _sTermEnd) {
                    var t = _sTermStart;
                    _sTermStart = _sTermEnd;
                    _sTermEnd = t;
                    t = _sOffStart;
                    _sOffStart = _sOffEnd;
                    _sOffEnd = t;
                }
                if (_sTermStart < 0) _sOffStart = _sTermStart = 0;

                if (_sTermEnd > Template.Terminals.Count - 1) {
                    _sTermEnd = Template.Terminals.Count - 1;
                    _sOffEnd = Template.Terminals[Template.Terminals.Count - 1].Text.Length;
                }
                if (_sOffStart < 0) {
                    --_sTermStart;
                    if (_sTermStart < 0) _sTermStart = _sOffStart = 0; else _sOffStart = Template.Terminals[_sTermStart].Text.Length - 1;
                }
                if (_sOffEnd > Template.Terminals[_sTermEnd].Text.Length - 1) {
                    ++_sTermEnd;
                    if (_sTermEnd > Template.Terminals.Count - 1) {
                        _sTermEnd = Template.Terminals.Count - 1;
                        _sOffEnd = Template.Terminals[_sTermEnd].Text.Length;
                    }
                    else _sOffEnd = 0;
                }
            }
        }