1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
package prompt
import (
"fmt"
"github.com/liamg/clinch/terminal"
"github.com/liamg/tml"
"github.com/pkg/term"
"sort"
)
const (
SPACE = 32
UP = 65
DOWN = 66
ESCAPE = 27
RETURN = 13
ROW_OFFSET = 2
DEFAULT_COLUMN = 0
)
type listItem struct {
index int
value string
selected bool
colour string
}
var ErrNoOptionsProvided = fmt.Errorf("no options were provided")
func (item *listItem) toString() string {
check := " "
if item.selected {
check = "X"
}
return fmt.Sprintf(" <darkgrey>[</darkgrey>%v<darkgrey>]</darkgrey> <%s>%v\n\r", check, item.colour, item.value)
}
func ChooseFromMultiList(message string, options []string) ([]int, []string, error) {
if len(options) == 0 {
return nil, nil, ErrNoOptionsProvided
}
sort.Strings(options)
var items []*listItem
colours := []string{"lightblue", "lightgreen", "lightyellow", "white"}
for index, option := range options {
col := colours[index%len(colours)]
items = append(items, &listItem{index: index, value: option, colour: col})
}
return getListSelection(message, items)
}
func getListSelection(message string, items []*listItem) ([]int, []string, error) {
fmt.Printf("\n %s\n\r", message)
currentPos := 0
drawItems(items, currentPos, false)
keyInput:
for {
keyCode, err := getKeyInput()
if err != nil {
return nil, nil, err
}
switch keyCode {
case DOWN:
if currentPos < len(items)-1 {
terminal.MoveCursorDown(1)
currentPos += 1
}
case UP:
if currentPos > 0 {
terminal.MoveCursorUp(1)
currentPos -= 1
}
case SPACE:
items[currentPos].selected = !items[currentPos].selected
drawItems(items, currentPos, true)
case ESCAPE:
resetPrompt(len(items) - currentPos)
return []int{}, []string{}, ErrUserCancelled
case RETURN:
break keyInput
}
}
resetPrompt(len(items) - currentPos)
var selectedIndexes []int
var selectedValues []string
for _, item := range items {
if !item.selected {
continue
}
selectedIndexes = append(selectedIndexes, item.index)
selectedValues = append(selectedValues, item.value)
}
return selectedIndexes, selectedValues, nil
}
func resetPrompt(rowPosition int) {
terminal.MoveCursorDown(rowPosition + ROW_OFFSET - 1)
terminal.ClearLine()
terminal.MoveCursorToColumn(DEFAULT_COLUMN)
}
func drawItems(items []*listItem, currentPos int, isRedraw bool) {
if isRedraw {
terminal.MoveCursorUp(currentPos)
}
fmt.Print("\r")
for _, item := range items {
_ = tml.Printf(item.toString())
}
fmt.Println("")
fmt.Println(" space to toggle, return to accept. (Esc to cancel): ")
terminal.MoveCursorUp(len(items) - currentPos + ROW_OFFSET)
terminal.MoveCursorToColumn(1)
}
func getKeyInput() (keyCode int, err error) {
t, err := term.Open("/dev/tty")
if err != nil {
return 0, err
}
err = term.RawMode(t)
if err != nil {
return 0, err
}
bytes := make([]byte, 3)
var numRead int
numRead, err = t.Read(bytes)
if err != nil {
return 0, err
}
if numRead == 3 && bytes[0] == 27 && bytes[1] == 91 {
switch bytes[2] {
case UP, DOWN:
keyCode = int(bytes[2])
}
} else if numRead == 1 {
switch bytes[0] {
case ESCAPE, RETURN, SPACE:
keyCode = int(bytes[0])
}
}
t.Restore()
t.Close()
return
}
|
