Method multiChoice

ishell.go:486–622

(options []string, text string, init []int, multiResults bool)

}

func (s *Shell) multiChoice(options []string, text string, init []int, multiResults bool) []int {
	s.multiChoiceActive = true
	defer func() { s.multiChoiceActive = false }()

	conf := s.reader.scanner.Config.Clone()

	conf.DisableAutoSaveHistory = true

	conf.FuncFilterInputRune = func(r rune) (rune, bool) {
		switch r {
		case 16:
			return -1, true
		case 14:
			return -2, true
		case 32:
			return -3, true

		}
		return r, true
	}

	var selected []int
	if multiResults {
		selected = initSelected(init, len(options))
	}

	s.ShowPrompt(false)
	defer s.ShowPrompt(true)

	// TODO this may not work on windows.
	s.Print("\033[?25l")
	defer s.Print("\033[?25h")

	cur := 0
	if len(selected) > 0 {
		cur = selected[len(selected)-1]
	}

	fd := int(os.Stdout.Fd())
	_, maxRows, err := readline.GetSize(fd)
	if err != nil {
		return nil
	}

	// move cursor to the top
	// TODO it happens on every update, however, some trash appears in history without this line
	s.Print("\033[0;0H")

	offset := fd

	update := func() {
		strs := buildOptionsStrings(options, selected, cur)
		if len(strs) > maxRows-1 {
			strs = strs[offset : maxRows+offset-1]
		}
		s.Print("\033[0;0H")
		// clear from the cursor to the end of the screen
		s.Print("\033[0J")