1
2
3 package winterm
4
5 const (
6 horizontal = iota
7 vertical
8 )
9
10 func (h *windowsAnsiEventHandler) getCursorWindow(info *CONSOLE_SCREEN_BUFFER_INFO) SMALL_RECT {
11 if h.originMode {
12 sr := h.effectiveSr(info.Window)
13 return SMALL_RECT{
14 Top: sr.top,
15 Bottom: sr.bottom,
16 Left: 0,
17 Right: info.Size.X - 1,
18 }
19 } else {
20 return SMALL_RECT{
21 Top: info.Window.Top,
22 Bottom: info.Window.Bottom,
23 Left: 0,
24 Right: info.Size.X - 1,
25 }
26 }
27 }
28
29
30 func (h *windowsAnsiEventHandler) setCursorPosition(position COORD, window SMALL_RECT) error {
31 position.X = ensureInRange(position.X, window.Left, window.Right)
32 position.Y = ensureInRange(position.Y, window.Top, window.Bottom)
33 err := SetConsoleCursorPosition(h.fd, position)
34 if err != nil {
35 return err
36 }
37 h.logf("Cursor position set: (%d, %d)", position.X, position.Y)
38 return err
39 }
40
41 func (h *windowsAnsiEventHandler) moveCursorVertical(param int) error {
42 return h.moveCursor(vertical, param)
43 }
44
45 func (h *windowsAnsiEventHandler) moveCursorHorizontal(param int) error {
46 return h.moveCursor(horizontal, param)
47 }
48
49 func (h *windowsAnsiEventHandler) moveCursor(moveMode int, param int) error {
50 info, err := GetConsoleScreenBufferInfo(h.fd)
51 if err != nil {
52 return err
53 }
54
55 position := info.CursorPosition
56 switch moveMode {
57 case horizontal:
58 position.X += int16(param)
59 case vertical:
60 position.Y += int16(param)
61 }
62
63 if err = h.setCursorPosition(position, h.getCursorWindow(info)); err != nil {
64 return err
65 }
66
67 return nil
68 }
69
70 func (h *windowsAnsiEventHandler) moveCursorLine(param int) error {
71 info, err := GetConsoleScreenBufferInfo(h.fd)
72 if err != nil {
73 return err
74 }
75
76 position := info.CursorPosition
77 position.X = 0
78 position.Y += int16(param)
79
80 if err = h.setCursorPosition(position, h.getCursorWindow(info)); err != nil {
81 return err
82 }
83
84 return nil
85 }
86
87 func (h *windowsAnsiEventHandler) moveCursorColumn(param int) error {
88 info, err := GetConsoleScreenBufferInfo(h.fd)
89 if err != nil {
90 return err
91 }
92
93 position := info.CursorPosition
94 position.X = int16(param) - 1
95
96 if err = h.setCursorPosition(position, h.getCursorWindow(info)); err != nil {
97 return err
98 }
99
100 return nil
101 }
102
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