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color_16.go
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color_16.go
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package color
import (
"fmt"
"strconv"
)
// Color Color16, 16 color value type
// 3(2^3=8) OR 4(2^4=16) bite color.
type Color uint8
type Basic = Color // alias of Color
// Opts basic color options. code: 0 - 9
type Opts []Color
// Add option value
func (o *Opts) Add(ops ...Color) {
for _, op := range ops {
if uint8(op) < 10 {
*o = append(*o, op)
}
}
}
// IsValid options
func (o Opts) IsValid() bool {
return len(o) > 0
}
// IsEmpty options
func (o Opts) IsEmpty() bool {
return len(o) == 0
}
// String options to string. eg: "1;3"
func (o Opts) String() string {
return Colors2code(o...)
}
/*************************************************************
* Basic 16 color definition
*************************************************************/
const (
// OptMax max option value. range: 0 - 9
OptMax = 10
// DiffFgBg diff foreground and background color
DiffFgBg = 10
)
// Boundary value for foreground/background color 16
//
// - base: fg 30~37, bg 40~47
// - light: fg 90~97, bg 100~107
const (
FgBase uint8 = 30
FgMax uint8 = 37
BgBase uint8 = 40
BgMax uint8 = 47
HiFgBase uint8 = 90
HiFgMax uint8 = 97
HiBgBase uint8 = 100
HiBgMax uint8 = 107
)
// Foreground colors. basic foreground colors 30 - 37
const (
FgBlack Color = iota + 30
FgRed
FgGreen
FgYellow
FgBlue
FgMagenta // 品红
FgCyan // 青色
FgWhite
// FgDefault revert default FG
FgDefault Color = 39
)
// Extra foreground color 90 - 97(非标准)
const (
FgDarkGray Color = iota + 90 // 亮黑(灰)
FgLightRed
FgLightGreen
FgLightYellow
FgLightBlue
FgLightMagenta
FgLightCyan
FgLightWhite
// FgGray is alias of FgDarkGray
FgGray Color = 90 // 亮黑(灰)
)
// Background colors. basic background colors 40 - 47
const (
BgBlack Color = iota + 40
BgRed
BgGreen
BgYellow // BgBrown like yellow
BgBlue
BgMagenta
BgCyan
BgWhite
// BgDefault revert default BG
BgDefault Color = 49
)
// Extra background color 100 - 107 (non-standard)
const (
BgDarkGray Color = iota + 100
BgLightRed
BgLightGreen
BgLightYellow
BgLightBlue
BgLightMagenta
BgLightCyan
BgLightWhite
// BgGray is alias of BgDarkGray
BgGray Color = 100
)
// Option settings. range: 0 - 9
const (
OpReset Color = iota // 0 重置所有设置
OpBold // 1 加粗
OpFuzzy // 2 模糊(不是所有的终端仿真器都支持)
OpItalic // 3 斜体(不是所有的终端仿真器都支持)
OpUnderscore // 4 下划线
OpBlink // 5 闪烁
OpFastBlink // 6 快速闪烁(未广泛支持)
OpReverse // 7 颠倒的 交换背景色与前景色
OpConcealed // 8 隐匿的
OpStrikethrough // 9 删除的,删除线(未广泛支持)
)
// There are basic and light foreground color aliases
const (
Red = FgRed
Cyan = FgCyan
Gray = FgDarkGray // is light Black
Blue = FgBlue
Black = FgBlack
Green = FgGreen
White = FgWhite
Yellow = FgYellow
Magenta = FgMagenta
// special
Bold = OpBold
Normal = FgDefault
// extra light
LightRed = FgLightRed
LightCyan = FgLightCyan
LightBlue = FgLightBlue
LightGreen = FgLightGreen
LightWhite = FgLightWhite
LightYellow = FgLightYellow
LightMagenta = FgLightMagenta
HiRed = FgLightRed
HiCyan = FgLightCyan
HiBlue = FgLightBlue
HiGreen = FgLightGreen
HiWhite = FgLightWhite
HiYellow = FgLightYellow
HiMagenta = FgLightMagenta
BgHiRed = BgLightRed
BgHiCyan = BgLightCyan
BgHiBlue = BgLightBlue
BgHiGreen = BgLightGreen
BgHiWhite = BgLightWhite
BgHiYellow = BgLightYellow
BgHiMagenta = BgLightMagenta
)
// Bit4 a method for create Color
func Bit4(code uint8) Color { return Color(code) }
/*************************************************************
* Color render methods
*************************************************************/
// Name get color code name.
func (c Color) Name() string {
name, ok := basic2nameMap[uint8(c)]
if ok {
return name
}
return "unknown"
}
// Text render a text message
func (c Color) Text(message string) string { return RenderString(c.String(), message) }
// Render messages by color setting
//
// Usage:
//
// green := color.FgGreen.Render
// fmt.Println(green("message"))
func (c Color) Render(a ...any) string { return RenderCode(c.String(), a...) }
// Renderln messages by color setting.
// like Println, will add spaces for each argument
//
// Usage:
//
// green := color.FgGreen.Renderln
// fmt.Println(green("message"))
func (c Color) Renderln(a ...any) string { return RenderWithSpaces(c.String(), a...) }
// Sprint render messages by color setting. is alias of the Render()
func (c Color) Sprint(a ...any) string { return RenderCode(c.String(), a...) }
// Sprintf format and render message.
//
// Usage:
//
// green := color.Green.Sprintf
// colored := green("message")
func (c Color) Sprintf(format string, args ...any) string {
return RenderString(c.String(), fmt.Sprintf(format, args...))
}
// Print messages.
//
// Usage:
//
// color.Green.Print("message")
//
// OR:
//
// green := color.FgGreen.Print
// green("message")
func (c Color) Print(args ...any) {
doPrintV2(c.Code(), fmt.Sprint(args...))
}
// Printf format and print messages.
//
// Usage:
//
// color.Cyan.Printf("string %s", "arg0")
func (c Color) Printf(format string, a ...any) {
doPrintV2(c.Code(), fmt.Sprintf(format, a...))
}
// Println messages with new line
func (c Color) Println(a ...any) { doPrintlnV2(c.String(), a) }
// Light current color. eg: 36(FgCyan) -> 96(FgLightCyan).
//
// Usage:
//
// lightCyan := Cyan.Light()
// lightCyan.Print("message")
func (c Color) Light() Color {
val := uint8(c)
if val >= 30 && val <= 47 {
return Color(val + 60)
}
// don't change
return c
}
// Darken current color. eg. 96(FgLightCyan) -> 36(FgCyan)
//
// Usage:
//
// cyan := LightCyan.Darken()
// cyan.Print("message")
func (c Color) Darken() Color {
val := uint8(c)
if val >= 90 && val <= 107 {
return Color(val - 60)
}
// don't change
return c
}
// C256 convert 16 color to 256-color code.
func (c Color) C256() Color256 {
val := uint8(c)
if val < 10 { // is option code
return emptyC256 // empty
}
var isBg uint8
if val >= BgBase && val <= 47 { // is bg
isBg = AsBg
val = val - 10 // to fg code
} else if val >= HiBgBase && val <= 107 { // is hi bg
isBg = AsBg
val = val - 10 // to fg code
}
if c256, ok := basicTo256Map[val]; ok {
return Color256{c256, isBg}
}
// use raw value direct convert
return Color256{val}
}
// ToFg always convert fg
func (c Color) ToFg() Color {
val := uint8(c)
// option code, don't change
if val < 10 {
return c
}
return Color(Bg2Fg(val))
}
// ToBg always convert bg
func (c Color) ToBg() Color {
val := uint8(c)
// option code, don't change
if val < 10 {
return c
}
return Color(Fg2Bg(val))
}
// RGB convert 16 color to 256-color code.
func (c Color) RGB() RGBColor {
val := uint8(c)
if val < 10 { // is option code
return emptyRGBColor
}
return HEX(Basic2hex(val), c.IsBg())
}
// Code convert to code string. eg "35"
func (c Color) Code() string {
return strconv.FormatInt(int64(c), 10)
}
// String convert to code string. eg "35"
func (c Color) String() string {
return strconv.FormatInt(int64(c), 10)
}
// IsBg check is background color
func (c Color) IsBg() bool {
val := uint8(c)
return val >= BgBase && val <= BgMax || val >= HiBgBase && val <= HiBgMax
}
// IsFg check is foreground color
func (c Color) IsFg() bool {
val := uint8(c)
return val >= FgBase && val <= FgMax || val >= HiFgBase && val <= HiFgMax
}
// IsOption check is option code: 0-9
func (c Color) IsOption() bool { return uint8(c) < OptMax }
// IsValid color value
func (c Color) IsValid() bool { return uint8(c) < HiBgMax }
/*************************************************************
* basic color maps
*************************************************************/
// FgColors foreground colors map
var FgColors = map[string]Color{
"black": FgBlack,
"red": FgRed,
"green": FgGreen,
"yellow": FgYellow,
"blue": FgBlue,
"magenta": FgMagenta,
"cyan": FgCyan,
"white": FgWhite,
"default": FgDefault,
}
// BgColors background colors map
var BgColors = map[string]Color{
"black": BgBlack,
"red": BgRed,
"green": BgGreen,
"yellow": BgYellow,
"blue": BgBlue,
"magenta": BgMagenta,
"cyan": BgCyan,
"white": BgWhite,
"default": BgDefault,
}
// ExFgColors extra foreground colors map
var ExFgColors = map[string]Color{
"darkGray": FgDarkGray,
"lightRed": FgLightRed,
"lightGreen": FgLightGreen,
"lightYellow": FgLightYellow,
"lightBlue": FgLightBlue,
"lightMagenta": FgLightMagenta,
"lightCyan": FgLightCyan,
"lightWhite": FgLightWhite,
}
// ExBgColors extra background colors map
var ExBgColors = map[string]Color{
"darkGray": BgDarkGray,
"lightRed": BgLightRed,
"lightGreen": BgLightGreen,
"lightYellow": BgLightYellow,
"lightBlue": BgLightBlue,
"lightMagenta": BgLightMagenta,
"lightCyan": BgLightCyan,
"lightWhite": BgLightWhite,
}
// Options color options map
//
// Deprecated: please use AllOptions instead.
var Options = AllOptions
// AllOptions color options map
var AllOptions = map[string]Color{
"reset": OpReset,
"bold": OpBold,
"fuzzy": OpFuzzy,
"italic": OpItalic,
"underscore": OpUnderscore,
"blink": OpBlink,
"reverse": OpReverse,
"concealed": OpConcealed,
}
var (
// TODO basic name alias
// basicNameAlias = map[string]string{}
// optionWithAlias = buildOpWithAlias()
// basic color name to code
// name2basicMap = initName2basicMap()
// basic2nameMap basic color code to name
basic2nameMap = map[uint8]string{
30: "black",
31: "red",
32: "green",
33: "yellow",
34: "blue",
35: "magenta",
36: "cyan",
37: "white",
// hi color code
90: "lightBlack",
91: "lightRed",
92: "lightGreen",
93: "lightYellow",
94: "lightBlue",
95: "lightMagenta",
96: "lightCyan",
97: "lightWhite",
// options
0: "reset",
1: "bold",
2: "fuzzy",
3: "italic",
4: "underscore",
5: "blink",
7: "reverse",
8: "concealed",
}
)
// Bg2Fg bg color value to fg value
func Bg2Fg(val uint8) uint8 {
if val >= BgBase && val <= 47 { // is bg
val = val - 10
} else if val >= HiBgBase && val <= 107 { // is hi bg
val = val - 10
}
return val
}
// Fg2Bg fg color value to bg value
func Fg2Bg(val uint8) uint8 {
if val >= FgBase && val <= 37 { // is fg
val = val + 10
} else if val >= HiFgBase && val <= 97 { // is hi fg
val = val + 10
}
return val
}
// Basic2nameMap data
func Basic2nameMap() map[uint8]string { return basic2nameMap }
// func initName2basicMap() map[string]uint8 {
// n2b := make(map[string]uint8, len(basic2nameMap))
// for u, s := range basic2nameMap {
// n2b[s] = u
// }
// return n2b
// }
// func buildOpWithAlias() map[string]uint8 {
// }