Refactor

internal/console/console.go

@@ -2,9 +2,7 @@ package console
 
 import (
 	"fmt"
-	"io"
 	"os"
-	"unicode/utf8"
 
 	"golang.org/x/term"
 )
@@ -25,7 +23,7 @@ func Raw() {
 
 func Cooked() {
 	if state == nil {
-		panic("state is nil")
+		panic("invalid state")
 	}
 	term.Restore(int(os.Stdin.Fd()), state)
 }
@@ -53,47 +51,7 @@ func ShowCursor() {
 func Size() (int, int) {
 	w, h, err := term.GetSize(int(os.Stdout.Fd()))
 	if err != nil {
-		panic(err)
+		return 80, 24
 	}
 	return w, h
 }
-
-func runeSize(b byte) int {
-	switch {
-	case b&0x80 == 0:
-		return 1
-	case b&0xe0 == 0xc0:
-		return 2
-	case b&0xf0 == 0xe0:
-		return 3
-	case b&0xf8 == 0xf0:
-		return 4
-	default:
-		return -1 // invalid
-	}
-}
-
-func ReadRune() rune {
-	buf := make([]byte, 1)
-	_, err := io.ReadFull(os.Stdin, buf)
-	if err != nil {
-		panic(err)
-	}
-	expected := runeSize(buf[0])
-	if expected == -1 {
-		panic("Invalid UTF-8 head")
-	}
-	full := make([]byte, expected)
-	full[0] = buf[0]
-	if expected > 1 {
-		_, err := io.ReadFull(os.Stdin, full[1:])
-		if err != nil {
-			panic(err)
-		}
-	}
-	r, size := utf8.DecodeRune(full)
-	if r == utf8.RuneError && size == 1 {
-		panic("Invalid UTF-8 body")
-	}
-	return r
-}