shithub: hell

ref: f6808341cc21e3b4c27b6b69ae4a7a1e79fc92b5
dir: /format.go/

package main

import (
	"strings"

	"github.com/chzyer/readline"
)

func hyphenate(input string) string {
	width := readline.GetScreenWidth()
	var remainder = []rune(input)
	var result []rune

	for len(remainder) > width-1 {
		if strings.HasPrefix(string(remainder), "\n") {
			result = append(result, '\n')
			remainder = remainder[1:]
			continue
		}

		index := strings.Index(string(remainder), "\n")
		// If a newline is found at or before the wrap position, break there.
		if index != -1 && index <= width-1 {
			result = append(result, remainder[:index]...)
			remainder = remainder[index:]
			continue
		}

		// otherwise we need to break the line
		result = append(result, remainder[:width-1]...)
		result = append(result, '\n')
		remainder = remainder[width-1:]
	}
	result = append(result, remainder...)
	return string(result)
}