Style your terminals using Go-Palette 🎨

#opensource #go #github #programming

Go-Palette provides elegant and convenient style definitions using ANSI colors.
It is fully compatible and wraps the fmt library for nice terminal layouts.

Example written using Go-palette package

Output of running the example written using Go-palette

Supported Colors & Formats

Standard colors

The following colors are supported to be used by their names for both foreground and background as shown in Example using color names

Color Name	Color Code
Black	0
Red	1
Green	2
Yellow	3
Blue	4
Magenta	5
Cyan	6
White	7
BrightBlack	8
BrightRed	9
BrightGreen	10
BrightYellow	11
BrightBlue	12
BrightMagenta	13
BrightCyan	14
BrightWhite	15

Standard colors used as foreground as well as background

Supported Foreground Palette

The following palette is supported as foreground/text colors. The numbers represent the color-codes which can be used as shown in Example using color codes.

Supported Background Palette

The following palette is supported as background colors. The numbers represent the color-codes which can be used as shown in Example using color codes.

Supported Text Formats

The following text formats are supported.

Reset
Bold
Dim
Italic
Underline
SlowBlink
Hidden
Strikethrough

Installation

go get github.com/abusomani/go-palette

Usage

After installing the go-palette package, we start using it the following way.

Import

A very useful feature of Go’s import statement are aliases. A common use case for import aliases is to provide a shorter alternative to a library’s package name.

In this example, we save ourselves having to type palette everytime we want to call one of the library’s functions, we just use pal instead.

import (
    pal "github.com/abusomani/go-palette/palette"
)

Example using Color names

package main

import (
    pal "github.com/abusomani/go-palette/palette"
)

func main() {
    p := pal.New()
    p.Println("This text is going to be in default color.")
    p.SetOptions(pal.WithBackground(pal.Color(pal.BrightYellow)), pal.WithForeground(pal.Black))
    p.Println("This text is going to be in black color with a yellow background.")
}

Output

Example using Color codes

package main

import (
    pal "github.com/abusomani/go-palette/palette"
)

func main() {
    p := pal.New()
    p.Println("This text is going to be in default color.")
    // We can use color codes from the palette to set as foreground and background colors
    p.SetOptions(pal.WithBackground(pal.Color(11)), pal.WithForeground(0))
    p.Println("This text is going to be in black color with a yellow background.")
}

Output

Example using Special effects

package main

import (
    pal "github.com/abusomani/go-palette/palette"
)

func main() {
    p := pal.New(pal.WithSpecialEffects([]pal.Special{pal.Bold}))
    p.Println("Bold")
    p.SetOptions(pal.WithSpecialEffects([]pal.Special{pal.Dim}))
    p.Println("Dim")
    p.SetOptions(pal.WithSpecialEffects([]pal.Special{pal.Italic}))
    p.Println("Italic")
    p.SetOptions(pal.WithSpecialEffects([]pal.Special{pal.Underline}))
    p.Println("Underline")
    p.SetOptions(pal.WithSpecialEffects([]pal.Special{pal.SlowBlink}))
    p.Println("SlowBlink")
    p.SetOptions(pal.WithSpecialEffects([]pal.Special{pal.Hidden}))
    p.Print("Hidden")
    p.SetOptions(pal.WithDefaults())
    p.Println("<-Hidden")
    p.SetOptions(pal.WithSpecialEffects([]pal.Special{pal.Strikethrough}))
    p.Println("Strikethrough")
}

Flush

Flush resets the Palette options with default values and disables the Palette.

package main

import (
    pal "github.com/abusomani/go-palette/palette"
)

func main() {
    p := pal.New()
    p.Println("This text is going to be in default color.")
    // We can use color codes from the palette to set as foreground and background colors
    p.SetOptions(pal.WithBackground(pal.BrightMagenta), pal.WithForeground(pal.Black))
    p.Println("This text is going to be in black color with a bright magenta background.")
    p.Flush()
    p.Println("This text is going to be in default color.")
}

Output

Limitations

Windows

Go-Palette provides ANSI colors only. Windows does not support ANSI out of the box. To toggle the ANSI color support follow the steps listed in this superuser thread.

Different behaviours in special effects

Go-Palette provides styled support using ANSI Color codes through escape sequences. This varies between different Terminals based on its setting. Refer ANSI Escape Codes for more details.