twisted_serve_ssh.py 文件源码

def _attrspec_to_escape(self, a):
        """
        Convert AttrSpec instance a to an escape sequence for the terminal

        >>> s = Screen()
        >>> s.set_terminal_properties(colors=256)
        >>> a2e = s._attrspec_to_escape
        >>> a2e(s.AttrSpec('brown', 'dark green'))
        '\\x1b[0;33;42m'
        >>> a2e(s.AttrSpec('#fea,underline', '#d0d'))
        '\\x1b[0;38;5;229;4;48;5;164m'
        """
        if a.foreground_high:
            fg = "38;5;%d" % a.foreground_number
        elif a.foreground_basic:
            if a.foreground_number > 7:
                if self.bright_is_bold:
                    fg = "1;%d" % (a.foreground_number - 8 + 30)
                else:
                    fg = "%d" % (a.foreground_number - 8 + 90)
            else:
                fg = "%d" % (a.foreground_number + 30)
        else:
            fg = "39"
        st = "1;" * a.bold + "4;" * a.underline + "7;" * a.standout
        if a.background_high:
            bg = "48;5;%d" % a.background_number
        elif a.background_basic:
            if a.background_number > 7:
                # this doesn't work on most terminals
                bg = "%d" % (a.background_number - 8 + 100)
            else:
                bg = "%d" % (a.background_number + 40)
        else:
            bg = "49"
        return urwid.escape.ESC + "[0;%s;%s%sm" % (fg, st, bg)