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
|
package widgets
import (
"github.com/mattn/go-runewidth"
tb "github.com/nsf/termbox-go"
"git.sr.ht/~sircmpwn/aerc2/lib/ui"
)
// TODO: history
// TODO: tab completion
// TODO: scrolling
type ExLine struct {
command []rune
commit func(cmd string)
cancel func()
index int
scroll int
onInvalidate func(d ui.Drawable)
}
func NewExLine(commit func (cmd string), cancel func()) *ExLine {
return &ExLine{
cancel: cancel,
commit: commit,
command: []rune{},
}
}
func (ex *ExLine) OnInvalidate(onInvalidate func(d ui.Drawable)) {
ex.onInvalidate = onInvalidate
}
func (ex *ExLine) Invalidate() {
if ex.onInvalidate != nil {
ex.onInvalidate(ex)
}
}
func (ex *ExLine) Draw(ctx *ui.Context) {
cell := tb.Cell{
Fg: tb.ColorDefault,
Bg: tb.ColorDefault,
Ch: ' ',
}
ctx.Fill(0, 0, ctx.Width(), ctx.Height(), cell)
ctx.Printf(0, 0, cell, ":%s", string(ex.command))
cells := runewidth.StringWidth(string(ex.command[:ex.index]))
tb.SetCursor(ctx.X()+cells+1, ctx.Y())
}
func (ex *ExLine) insert(ch rune) {
left := ex.command[:ex.index]
right := ex.command[ex.index:]
ex.command = append(left, append([]rune{ch}, right...)...)
ex.index++
ex.Invalidate()
}
func (ex *ExLine) deleteWord() {
// TODO: Break on any of / " '
if len(ex.command) == 0 {
return
}
i := ex.index - 1
if ex.command[i] == ' ' {
i--
}
for ; i >= 0; i-- {
if ex.command[i] == ' ' {
break
}
}
ex.command = append(ex.command[:i+1], ex.command[ex.index:]...)
ex.index = i + 1
ex.Invalidate()
}
func (ex *ExLine) deleteChar() {
if len(ex.command) > 0 && ex.index != len(ex.command) {
ex.command = append(ex.command[:ex.index], ex.command[ex.index+1:]...)
ex.Invalidate()
}
}
func (ex *ExLine) backspace() {
if len(ex.command) > 0 && ex.index != 0 {
ex.command = append(ex.command[:ex.index-1], ex.command[ex.index:]...)
ex.index--
ex.Invalidate()
}
}
func (ex *ExLine) Event(event tb.Event) bool {
switch event.Type {
case tb.EventKey:
switch event.Key {
case tb.KeySpace:
ex.insert(' ')
case tb.KeyBackspace, tb.KeyBackspace2:
ex.backspace()
case tb.KeyCtrlD, tb.KeyDelete:
ex.deleteChar()
case tb.KeyCtrlB, tb.KeyArrowLeft:
if ex.index > 0 {
ex.index--
ex.Invalidate()
}
case tb.KeyCtrlF, tb.KeyArrowRight:
if ex.index < len(ex.command) {
ex.index++
ex.Invalidate()
}
case tb.KeyCtrlA, tb.KeyHome:
ex.index = 0
ex.Invalidate()
case tb.KeyCtrlE, tb.KeyEnd:
ex.index = len(ex.command)
ex.Invalidate()
case tb.KeyCtrlW:
ex.deleteWord()
case tb.KeyEnter:
tb.HideCursor()
ex.commit(string(ex.command))
case tb.KeyEsc, tb.KeyCtrlC:
tb.HideCursor()
ex.cancel()
default:
if event.Ch != 0 {
ex.insert(event.Ch)
}
}
}
return true
}
|