if line.mode ~= 'text' then return end

--            - 0 <= y_offset <= Line_height

--            - 0 <= y_offset <= Line_height if line is text

  local line,pos_index = 1,1
  Text.populate_screen_line_starting_pos(pane, line)
  while y_offset >= Line_height do
    pos_index = pos_index + 1
    if pos_index > #pane.line_cache[line].screen_line_starting_pos then
      line = line+1
      pos_index = 1
      Text.populate_screen_line_starting_pos(pane, line)

  for i=1,#pane.lines do
    Text.populate_screen_line_starting_pos(pane, i)
    local height = line_height(pane, i, pane.left, pane.right)
    if y_offset < height then
      local line = pane.lines[i]
      if line.mode ~= 'text' then
        return {line=i, pos=1}, y_offset
      else
        local nlines = math.floor(y_offset/pane.line_height)
        local pos = pane.line_cache[i].screen_line_starting_pos[nlines+1]  -- switch to 1-indexing
        y_offset = y_offset - nlines*pane.line_height
        return {line=i, pos=pos}, y_offset
      end

    y_offset = y_offset - Line_height

    y_offset = y_offset - height

  return {line=line, pos=pane.line_cache[line].screen_line_starting_pos[pos_index]}, y_offset

  -- y is below the pane
  return {line=#pane.lines+1, pos=1}, y_offset