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package main
// Utility to print all 256 terminal colors. This is useful for debugging themes
// and ensuring the terminal supports the expected color range.
import (
"fmt"
"os"
"github.com/nsf/termbox-go"
)
// PrintColors initializes termbox and draws a grid of all 256 available colors.
func PrintColors() {
err := termbox.Init()
if err != nil {
fmt.Fprintf(os.Stderr, "failed to init termbox: %v\n", err)
return
}
defer termbox.Close()
// Enable 256-color mode for the output.
termbox.SetOutputMode(termbox.Output256)
termbox.Clear(termbox.ColorDefault, termbox.ColorDefault)
w, _ := termbox.Size()
// Adjust grid columns based on terminal width.
cols := 16
if w < 64 {
cols = 8
}
// Loop through all 256 colors and draw them in a grid.
for i := 0; i < 256; i++ {
row := (i / cols) * 2
col := (i % cols) * 5
bg := termbox.Attribute(i)
fg := termbox.ColorWhite
// Ensure text is readable against light/dark backgrounds.
if i == 7 || i > 240 {
fg = termbox.ColorBlack
}
// Draw the color index and a colored block.
str := fmt.Sprintf("%5d", i)
for j, r := range str {
termbox.SetCell(col+j, row, r, fg, bg)
termbox.SetCell(col+j, row+1, ' ', fg, bg)
}
}
msg := "Press any key to exit..."
for i, r := range msg {
termbox.SetCell(i, (256/cols)*2, r, termbox.ColorWhite, termbox.ColorDefault)
}
termbox.Flush()
// Wait for any key press before closing.
termbox.PollEvent()
}
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