-
Notifications
You must be signed in to change notification settings - Fork 0
/
color.go
59 lines (49 loc) · 1.14 KB
/
color.go
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
package skk
import (
"github.com/nyaosorg/go-readline-ny"
)
type Coloring struct {
Base readline.Coloring
bits int
}
const (
whiteMarkerBit = 1
blackMarkerBit = 2
nextIsMarkerBit = 4
ansiUnderline = 4
ansiReverse = 7
markerPrefix = '\u0000'
)
func (c *Coloring) Init() readline.ColorSequence {
color := readline.SGR1(0)
if c.Base != nil {
color = color.Chain(c.Base.Init())
}
return color
}
func (c *Coloring) Next(ch rune) readline.ColorSequence {
if ch == readline.CursorPositionDummyRune {
c.bits &^= whiteMarkerBit | blackMarkerBit
} else if (c.bits&nextIsMarkerBit) != 0 && ch == markerWhiteRune {
c.bits |= whiteMarkerBit
c.bits &^= nextIsMarkerBit
} else if (c.bits&nextIsMarkerBit) != 0 && ch == markerBlackRune {
c.bits |= blackMarkerBit
c.bits &^= nextIsMarkerBit
} else if ch == markerPrefix {
c.bits |= nextIsMarkerBit
} else {
c.bits &^= nextIsMarkerBit
}
color := readline.SGR1(0)
if c.Base != nil {
color = color.Chain(c.Base.Next(ch))
}
if (c.bits & whiteMarkerBit) != 0 {
color = color.Add(ansiReverse)
}
if (c.bits & blackMarkerBit) != 0 {
color = color.Add(ansiUnderline)
}
return color
}