-- render any link decorations
      for _,link_offsets in ipairs(line_cache.link_offsets) do
        local s,e,filename = unpack(link_offsets)
        local lo, hi = Text.clip_filename_with_screen_line(line, line_cache, i, s, e)
        if lo then
          button(State, 'link', {x=State.left+lo, y=y, w=hi-lo, h=State.line_height, color={1,1,1},
            icon = icon.hyperlink_decoration,
            onpress1 = function()
                         run.switch_to_file(filename)
                       end,
          })
        end

      local screen_line = Text.screen_line(line, line_cache, i)
--?       print('text.draw:', screen_line, 'at', line_index,pos, 'after', x,y)
      local frag_len = utf8.len(screen_line)

      local screen_line = Text.screen_line(line, line_cache, i)
--?       print('text.draw:', screen_line, 'at', line_index,pos, 'after', x,y)
      local frag_len = utf8.len(screen_line)