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
|
package mpb
import (
"io"
"strings"
"github.com/mattn/go-runewidth"
"github.com/vbauerster/mpb/v8/decor"
"github.com/vbauerster/mpb/v8/internal"
)
const (
positionLeft = 1 + iota
positionRight
)
var defaultSpinnerStyle = [...]string{"⠋", "⠙", "⠹", "⠸", "⠼", "⠴", "⠦", "⠧", "⠇", "⠏"}
// SpinnerStyleComposer interface.
type SpinnerStyleComposer interface {
BarFillerBuilder
PositionLeft() SpinnerStyleComposer
PositionRight() SpinnerStyleComposer
Meta(func(string) string) SpinnerStyleComposer
}
type sFiller struct {
frames []string
count uint
meta func(string) string
position func(string, int) string
}
type spinnerStyle struct {
position uint
frames []string
meta func(string) string
}
// SpinnerStyle constructs default spinner style which can be altered via
// SpinnerStyleComposer interface.
func SpinnerStyle(frames ...string) SpinnerStyleComposer {
ss := spinnerStyle{
meta: func(s string) string { return s },
}
if len(frames) != 0 {
ss.frames = frames
} else {
ss.frames = defaultSpinnerStyle[:]
}
return ss
}
func (s spinnerStyle) PositionLeft() SpinnerStyleComposer {
s.position = positionLeft
return s
}
func (s spinnerStyle) PositionRight() SpinnerStyleComposer {
s.position = positionRight
return s
}
func (s spinnerStyle) Meta(fn func(string) string) SpinnerStyleComposer {
s.meta = fn
return s
}
func (s spinnerStyle) Build() BarFiller {
sf := &sFiller{
frames: s.frames,
meta: s.meta,
}
switch s.position {
case positionLeft:
sf.position = func(frame string, padWidth int) string {
return frame + strings.Repeat(" ", padWidth)
}
case positionRight:
sf.position = func(frame string, padWidth int) string {
return strings.Repeat(" ", padWidth) + frame
}
default:
sf.position = func(frame string, padWidth int) string {
return strings.Repeat(" ", padWidth/2) + frame + strings.Repeat(" ", padWidth/2+padWidth%2)
}
}
return sf
}
func (s *sFiller) Fill(w io.Writer, stat decor.Statistics) error {
width := internal.CheckRequestedWidth(stat.RequestedWidth, stat.AvailableWidth)
frame := s.frames[s.count%uint(len(s.frames))]
frameWidth := runewidth.StringWidth(frame)
s.count++
if width < frameWidth {
return nil
}
_, err := io.WriteString(w, s.position(s.meta(frame), width-frameWidth))
return err
}
|
