package bug import ( "crypto/sha1" "fmt" "image/color" "strings" "github.com/MichaelMure/git-bug/util/text" ) type Label string func (l Label) String() string { return string(l) } type LabelColor color.RGBA // RGBA from a Label computed in a deterministic way func (l Label) Color() LabelColor { id := 0 hash := sha1.Sum([]byte(l)) // colors from: https://material-ui.com/style/color/ colors := []LabelColor{ LabelColor{R: 244, G: 67, B: 54, A: 255}, // red LabelColor{R: 233, G: 30, B: 99, A: 255}, // pink LabelColor{R: 156, G: 39, B: 176, A: 255}, // purple LabelColor{R: 103, G: 58, B: 183, A: 255}, // deepPurple LabelColor{R: 63, G: 81, B: 181, A: 255}, // indigo LabelColor{R: 33, G: 150, B: 243, A: 255}, // blue LabelColor{R: 3, G: 169, B: 244, A: 255}, // lightBlue LabelColor{R: 0, G: 188, B: 212, A: 255}, // cyan LabelColor{R: 0, G: 150, B: 136, A: 255}, // teal LabelColor{R: 76, G: 175, B: 80, A: 255}, // green LabelColor{R: 139, G: 195, B: 74, A: 255}, // lightGreen LabelColor{R: 205, G: 220, B: 57, A: 255}, // lime LabelColor{R: 255, G: 235, B: 59, A: 255}, // yellow LabelColor{R: 255, G: 193, B: 7, A: 255}, // amber LabelColor{R: 255, G: 152, B: 0, A: 255}, // orange LabelColor{R: 255, G: 87, B: 34, A: 255}, // deepOrange LabelColor{R: 121, G: 85, B: 72, A: 255}, // brown LabelColor{R: 158, G: 158, B: 158, A: 255}, // grey LabelColor{R: 96, G: 125, B: 139, A: 255}, // blueGrey } for _, char := range hash { id = (id + int(char)) % len(colors) } return colors[id] } func (lc LabelColor) RGBA() color.RGBA { return color.RGBA(lc) } type Term256 int func (lc LabelColor) Term256() Term256 { red := Term256(lc.R) * 6 / 256 green := Term256(lc.G) * 6 / 256 blue := Term256(lc.B) * 6 / 256 return red*36 + green*6 + blue + 16 } func (t Term256) Escape() string { return fmt.Sprintf("\x1b[38;5;%dm", t) } func (t Term256) Unescape() string { return "\x1b[0m" } func (l Label) Validate() error { str := string(l) if text.Empty(str) { return fmt.Errorf("empty") } if strings.Contains(str, "\n") { return fmt.Errorf("should be a single line") } if !text.Safe(str) { return fmt.Errorf("not fully printable") } return nil }