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package main
import (
"fmt"
"image/color"
"os"
"github.com/charmbracelet/colorprofile"
)
func main() {
// Detect the color profile for stdout.
p := colorprofile.Detect(os.Stdout, os.Environ())
fmt.Printf("Your color profile is what we call '%s'.\n\n", p)
// Let's talk about the profile.
fmt.Printf("You know, your colors are quite %s.\n\n", func() string {
switch p {
case colorprofile.TrueColor:
return "fancy"
case colorprofile.ANSI256:
return "1990s fancy"
case colorprofile.ANSI:
return "normcore"
case colorprofile.Ascii:
return "ancient"
case colorprofile.NoTTY:
return "naughty!"
}
// This should never happen.
return "...IDK"
}())
// Here's a nice color.
myCuteColor := color.RGBA{0x6b, 0x50, 0xff, 0xff} // #6b50ff
fmt.Printf("A cute color we like is: %s.\n\n", colorToHex(myCuteColor))
// Let's convert it to the detected color profile.
theColorWeNeed := p.Convert(myCuteColor)
fmt.Printf("This terminal needs that color to be a %T, at best.\n", theColorWeNeed)
fmt.Printf("In this case that color is %s.\n\n", colorToHex(theColorWeNeed))
// Now let's convert it to a color profile that only supports up to 256
// colors.
ansi256Color := colorprofile.ANSI256.Convert(myCuteColor)
fmt.Printf("Apple Terminal would want this color to be: %d (an %T).\n\n", ansi256Color, ansi256Color)
// But really, who has time to convert? Not you? Well, kiddo, here's
// a magical writer that will just auto-convert whatever ANSI you throw at
// it to the appropriate color profile.
myFancyANSI := "\x1b[38;2;107;80;255mCute \x1b[1;3mpuppy!!\x1b[m"
w := colorprofile.NewWriter(os.Stdout, os.Environ())
fmt.Fprintln(w, "This terminal:", myFancyANSI)
// But we're old school. Make the writer only use 4-bit ANSI, 1980s style.
w.Profile = colorprofile.ANSI
fmt.Fprintln(w, "4-bit ANSI:", myFancyANSI)
// Too colorful. Use black and white only.
w.Profile = colorprofile.Ascii
fmt.Fprintln(w, "Old school cool:", myFancyANSI) // no colors
// That's way too modern. Let's go back to MIT in the 1970s.
w.Profile = colorprofile.NoTTY
fmt.Fprintln(w, "No TTY :(", myFancyANSI) // less fancy
}
func colorToHex(c color.Color) string {
if c == nil {
return ""
}
r, g, b, _ := c.RGBA()
return fmt.Sprintf("#%02x%02x%02x", r>>8, g>>8, b>>8)
}
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