515         uslice = lambda i: u[i:]

   516         chars.reverse()

   516         concat = lambda s: ellipsis + s

   517     width_so_far = 0

   517     else:

   518     for i, c in enumerate(chars):

   518         uslice = lambda i: u[:-i]

   519         width_so_far += ucolwidth(c)

   519         concat = lambda s: s + ellipsis

   520         if width_so_far > width:

   520     for i in pycompat.xrange(1, len(u)):

   521             break

   521         usub = uslice(i)

   522     chars = chars[:i]

   522         if ucolwidth(usub) <= width:

   523     if leftside:

   523             return concat(usub.encode(_sysstr(encoding)))

   524         chars.reverse()

   524     return ellipsis  # no enough room for multi-column characters

   525     u = u''.join(chars).encode(_sysstr(encoding))

   526     if leftside:

   527         return ellipsis + u

   528     return u + ellipsis