1 files changed, 62 insertions, 0 deletions

diff --git a/colors.go b/colors.go
new file mode 100644
index 0000000..d88b968
--- /dev/null
+++ b/colors.go
@@ -0,0 +1,62 @@
+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()
+}