termui/helper.go

package termui

import "unicode/utf8"
import "strings"
import tm "github.com/nsf/termbox-go"

type Attribute uint16

const (
	ColorDefault Attribute = iota
	ColorBlack
	ColorRed
	ColorGreen
	ColorYellow
	ColorBlue
	ColorMagenta
	ColorCyan
	ColorWhite
)

const (
	AttrBold Attribute = 1 << (iota + 9)
	AttrUnderline
	AttrReverse
)

func toTmAttr(x Attribute) tm.Attribute {
	return tm.Attribute(x)
}

func str2runes(s string) []rune {
	n := utf8.RuneCountInString(s)
	ss := strings.Split(s, "")

	rs := make([]rune, n)
	for i := 0; i < n; i++ {
		r, _ := utf8.DecodeRuneInString(ss[i])
		rs[i] = r
	}
	return rs
}

func trimStr2Runes(s string, w int) []rune {
	rs := str2runes(s)
	if w <= 0 {
		return []rune{}
	}
	if len(rs) > w {
		rs = rs[:w]
		rs[w-1] = '…'
	}
	return rs
}