111 lines
2.3 KiB
Go
111 lines
2.3 KiB
Go
// Copyright 2014 The gocui Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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import (
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"errors"
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"fmt"
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"log"
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"os"
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"github.com/awesome-gocui/gocui"
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colorful "github.com/lucasb-eyer/go-colorful"
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)
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var dark = false
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func main() {
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os.Setenv("COLORTERM", "truecolor")
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g, err := gocui.NewGui(gocui.OutputTrue, true)
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if err != nil {
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log.Panicln(err)
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}
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defer g.Close()
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g.SetManagerFunc(layout)
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if err := g.SetKeybinding("", gocui.KeyCtrlC, gocui.ModNone, quit); err != nil {
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log.Panicln(err)
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}
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if err := g.SetKeybinding("", gocui.KeyCtrlR, gocui.ModNone, func(g *gocui.Gui, v *gocui.View) error {
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if dark {
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dark = false
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} else {
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dark = true
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}
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displayHsv(v)
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return nil
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}); err != nil {
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log.Panicln(err)
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}
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if err := g.MainLoop(); err != nil && !errors.Is(err, gocui.ErrQuit) {
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log.Panicln(err)
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}
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}
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func layout(g *gocui.Gui) error {
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maxX, maxY := g.Size()
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rows := 33
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cols := 182
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if maxY < rows {
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rows = maxY
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}
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if maxX < cols {
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cols = maxX
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}
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if v, err := g.SetView("colors", 0, 0, cols-1, rows-1, 0); err != nil {
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if !errors.Is(err, gocui.ErrUnknownView) {
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return err
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}
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v.FrameColor = gocui.GetColor("#FFAA55")
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displayHsv(v)
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if _, err := g.SetCurrentView("colors"); err != nil {
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return err
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}
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}
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return nil
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}
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func displayHsv(v *gocui.View) {
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v.Clear()
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str := ""
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// HSV color space (lines are value or saturation)
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for i := 50; i > 0; i -= 2 {
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// Hue
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for j := 0; j < 360; j += 2 {
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ir, ig, ib := hsv(j, i-1)
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ir2, ig2, ib2 := hsv(j, i)
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str += fmt.Sprintf("\x1b[48;2;%d;%d;%dm\x1b[38;2;%d;%d;%dm▀\x1b[0m", ir, ig, ib, ir2, ig2, ib2)
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}
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str += "\n"
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fmt.Fprint(v, str)
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str = ""
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}
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fmt.Fprintln(v, "\n\x1b[38;5;245mCtrl + R - Switch light/dark mode")
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fmt.Fprintln(v, "\nCtrl + C - Exit\n")
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fmt.Fprint(v, "Example should enable true color, but if it doesn't work run this command: \x1b[0mexport COLORTERM=truecolor")
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}
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func hsv(hue, sv int) (uint32, uint32, uint32) {
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if !dark {
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ir, ig, ib, _ := colorful.Hsv(float64(hue), float64(sv)/50, float64(1)).RGBA()
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return ir >> 8, ig >> 8, ib >> 8
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}
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ir, ig, ib, _ := colorful.Hsv(float64(hue), float64(1), float64(sv)/50).RGBA()
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return ir >> 8, ig >> 8, ib >> 8
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}
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func quit(g *gocui.Gui, v *gocui.View) error {
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return gocui.ErrQuit
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}
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