cli/cmd/termsize/main.go

package main

import "surdeus.su/core/cli/tx"
import "log"
import "os"
//import "io"
import "surdeus.su/core/cli/aes"
//import "fmt"

func main() {

	normalMode := true
	term, err := tx.NewTerminal(os.Stdin)
	if err != nil {
		// Some not terminal handling.
		log.Fatalf("tx.NewTerminal(...): %s\n", err)
	}
	keys, signals, err := term.MakeRaw()
	if err != nil {
		log.Fatalf("term.MakeRaw(...) %s\n", err)
	}
	term.EnableAltBuffer()
	defer term.Restore()

	var x, y int
	x, y = 1, 2
	update := func() {
		term.SaveCursor()
		term.MoveCursorTo(1, 1)
		term.EraseLine()
		w, h, _ := term.Size()
		term.Print(
			aes.ETF("%dx%d %d %d", w, h, x, y).
				Bold().
				With(aes.EffectRedBG).
				With(aes.EffectBlackFG),
		)
		term.UndoCursor()
	}

	term.MoveCursorTo(x, y)
	update()
	MAIN:
	for {
		select {
		// Handling signals.
		case sig := <-signals :
			if sig == tx.SignalWinChange {
			}
		// Handling keys.
		case key := <-keys :
			if key == tx.KeyControlC {
				break MAIN
			}
			if !normalMode && key == tx.KeyESC {
				normalMode = true
				break
			}
			if normalMode { switch key {
			case 'j':
				term.MoveCursorDown(1)
				y++
			case 'k':
				if y == 2 {
					break
				}
				term.MoveCursorUp(1)
				y--
			case 'h':
				if x == 1 {
					break
				}
				term.MoveCursorLeft(1)
				x--
			case 'l' :
				term.MoveCursorRight(1)
				x++
			case tx.KeyESC :
			case 'i' :
				normalMode = false
			}
			break }

			if key == tx.KeyEnter {
				term.NextLine(1)
				//term.Print("enter")
				break
			}

			term.Print(
				aes.ETF("%s", string(key)).
					Bold().
					With(aes.EffectRedFG),
			)
		}
		update()
	}
}