moby--moby/vendor/github.com/morikuni/aec

aec

Go wrapper for ANSI escape code.

Install

go get github.com/morikuni/aec

Features

ANSI escape codes depend on terminal environment.
Some of these features may not work.
Check supported Font-Style/Font-Color features with checkansi.

Wikipedia for more detail.

Cursor

• Up(n)
• Down(n)
• Right(n)
• Left(n)
• NextLine(n)
• PreviousLine(n)
• Column(col)
• Position(row, col)
• Save
• Restore
• Hide
• Show
• Report

Erase

• EraseDisplay(mode)
• EraseLine(mode)

Scroll

• ScrollUp(n)
• ScrollDown(n)

Font Style

• Bold
• Faint
• Italic
• Underline
• BlinkSlow
• BlinkRapid
• Inverse
• Conceal
• CrossOut
• Frame
• Encircle
• Overline

Font Color

Foreground color.

• DefaultF
• BlackF
• RedF
• GreenF
• YellowF
• BlueF
• MagentaF
• CyanF
• WhiteF
• LightBlackF
• LightRedF
• LightGreenF
• LightYellowF
• LightBlueF
• LightMagentaF
• LightCyanF
• LightWhiteF
• Color3BitF(color)
• Color8BitF(color)
• FullColorF(r, g, b)

Background color.

• DefaultB
• BlackB
• RedB
• GreenB
• YellowB
• BlueB
• MagentaB
• CyanB
• WhiteB
• LightBlackB
• LightRedB
• LightGreenB
• LightYellowB
• LightBlueB
• LightMagentaB
• LightCyanB
• LightWhiteB
• Color3BitB(color)
• Color8BitB(color)
• FullColorB(r, g, b)

Color Converter

24bit RGB color to ANSI color.

• NewRGB3Bit(r, g, b)
• NewRGB8Bit(r, g, b)

Builder

To mix these features.

custom := aec.EmptyBuilder.Right(2).RGB8BitF(128, 255, 64).RedB().ANSI
custom.Apply("Hello World")

Usage

1. Create ANSI by aec.XXX().With(aec.YYY()) or aec.EmptyBuilder.XXX().YYY().ANSI
2. Print ANSI by fmt.Print(ansi, "some string", aec.Reset) or fmt.Print(ansi.Apply("some string"))

aec.Reset should be added when using font style or font color features.

Example

Simple progressbar.

package main

import (
	"fmt"
	"strings"
	"time"

	"github.com/morikuni/aec"
)

func main() {
	const n = 20
	builder := aec.EmptyBuilder

	up2 := aec.Up(2)
	col := aec.Column(n + 2)
	bar := aec.Color8BitF(aec.NewRGB8Bit(64, 255, 64))
	label := builder.LightRedF().Underline().With(col).Right(1).ANSI

	// for up2
	fmt.Println()
	fmt.Println()

	for i := 0; i <= n; i++ {
		fmt.Print(up2)
		fmt.Println(label.Apply(fmt.Sprint(i, "/", n)))
		fmt.Print("[")
		fmt.Print(bar.Apply(strings.Repeat("=", i)))
		fmt.Println(col.Apply("]"))
		time.Sleep(100 * time.Millisecond)
	}
}

License

MIT