1package bug
2
3import (
4 "crypto/sha1"
5 "fmt"
6 "image/color"
7 "strings"
8
9 "github.com/MichaelMure/git-bug/util/text"
10)
11
12type Label string
13
14func (l Label) String() string {
15 return string(l)
16}
17
18type LabelColor color.RGBA
19
20// RGBA from a Label computed in a deterministic way
21func (l Label) Color() LabelColor {
22 id := 0
23 hash := sha1.Sum([]byte(l))
24
25 // colors from: https://material-ui.com/style/color/
26 colors := []LabelColor{
27 LabelColor{R: 244, G: 67, B: 54, A: 255}, // red
28 LabelColor{R: 233, G: 30, B: 99, A: 255}, // pink
29 LabelColor{R: 156, G: 39, B: 176, A: 255}, // purple
30 LabelColor{R: 103, G: 58, B: 183, A: 255}, // deepPurple
31 LabelColor{R: 63, G: 81, B: 181, A: 255}, // indigo
32 LabelColor{R: 33, G: 150, B: 243, A: 255}, // blue
33 LabelColor{R: 3, G: 169, B: 244, A: 255}, // lightBlue
34 LabelColor{R: 0, G: 188, B: 212, A: 255}, // cyan
35 LabelColor{R: 0, G: 150, B: 136, A: 255}, // teal
36 LabelColor{R: 76, G: 175, B: 80, A: 255}, // green
37 LabelColor{R: 139, G: 195, B: 74, A: 255}, // lightGreen
38 LabelColor{R: 205, G: 220, B: 57, A: 255}, // lime
39 LabelColor{R: 255, G: 235, B: 59, A: 255}, // yellow
40 LabelColor{R: 255, G: 193, B: 7, A: 255}, // amber
41 LabelColor{R: 255, G: 152, B: 0, A: 255}, // orange
42 LabelColor{R: 255, G: 87, B: 34, A: 255}, // deepOrange
43 LabelColor{R: 121, G: 85, B: 72, A: 255}, // brown
44 LabelColor{R: 158, G: 158, B: 158, A: 255}, // grey
45 LabelColor{R: 96, G: 125, B: 139, A: 255}, // blueGrey
46 }
47
48 for _, char := range hash {
49 id = (id + int(char)) % len(colors)
50 }
51
52 return colors[id]
53}
54
55func (lc LabelColor) RGBA() color.RGBA {
56 return color.RGBA(lc)
57}
58
59type Term256 int
60
61func (lc LabelColor) Term256() Term256 {
62 red := Term256(lc.R) * 6 / 256
63 green := Term256(lc.G) * 6 / 256
64 blue := Term256(lc.B) * 6 / 256
65
66 return red*36 + green*6 + blue + 16
67}
68
69func (t Term256) Escape() string {
70 return fmt.Sprintf("\x1b[38;5;%dm", t)
71}
72
73func (t Term256) Unescape() string {
74 return "\x1b[0m"
75}
76
77func (l Label) Validate() error {
78 str := string(l)
79
80 if text.Empty(str) {
81 return fmt.Errorf("empty")
82 }
83
84 if strings.Contains(str, "\n") {
85 return fmt.Errorf("should be a single line")
86 }
87
88 if !text.Safe(str) {
89 return fmt.Errorf("not fully printable")
90 }
91
92 return nil
93}