assert(State.lines[State.cursor1.line].mode == 'text')

  assert(State.lines[State.cursor1.line].mode == 'text')

  return loc1.line > #State.lines
      or loc1.pos > #State.lines[loc1.line].data

end
function edit.cursor_on_text(State)
  return State.cursor1.line <= #State.lines
      and State.lines[State.cursor1.line].mode == 'text'
end
function edit.put_cursor_on_first_text_line(State)

        button(State, 'draw', {x=4,y=y+4, w=12,h=12, color={1,1,0},

          icon = icon.insert_drawing,
          onpress1 = function()
                       Drawing.before = snapshot(State, line_index-1, line_index)
                       table.insert(State.lines, line_index, {mode='drawing', y=y, h=256/2, points={}, shapes={}, pending={}})
                       table.insert(State.line_cache, line_index, {})
                       if State.cursor1.line >= line_index then
                         State.cursor1.line = State.cursor1.line+1
                       end
                       schedule_save(State)
                       record_undo_event(State, {before=Drawing.before, after=snapshot(State, line_index-1, line_index+1)})
                     end,
        })

  if State.search_term then return end
  if mouse_press_consumed_by_any_button_handler(State, x,y, mouse_button) then
    -- press on a button and it returned 'true' to short-circuit
    return
  end
  for line_index,line in ipairs(State.lines) do
    if line.mode == 'text' then
      if Text.in_line(State, line_index, x,y) then
        -- delicate dance between cursor, selection and old cursor/selection
        -- scenarios:
        --  regular press+release: sets cursor, clears selection
        --  shift press+release:
        --    sets selection to old cursor if not set otherwise leaves it untouched
        --    sets cursor
        --  press and hold to start a selection: sets selection on press, cursor on release
        --  press and hold, then press shift: ignore shift
        --    i.e. mouse_release should never look at shift state
        State.old_cursor1 = State.cursor1
        State.old_selection1 = State.selection1
        State.mousepress_shift = App.shift_down()
        State.selection1 = {
            line=line_index,
            pos=Text.to_pos_on_line(State, line_index, x, y),
        }
--?         print('selection', State.selection1.line, State.selection1.pos)
        break

--?   print('press', State.selection1.line, State.selection1.pos)

--?   print('press', State.cursor1.line)

--?   print('press', State.cursor1.line)
--?   print('release', State.cursor1.line)
--?   print('text input', t)
  elseif State.lines.current_drawing and State.current_drawing_mode == 'name' then

--?   print('release')

--?   print('release', State.cursor1.line)

--?   print('text input', t)

  elseif State.current_drawing_mode == 'name' then

  elseif State.lines.current_drawing and State.current_drawing_mode == 'name' then

  elseif State.current_drawing_mode == 'name' then

    if chord == 'return' then
      State.current_drawing_mode = State.previous_drawing_mode
      State.previous_drawing_mode = nil
    else
      local before = snapshot(State, State.lines.current_drawing_index)
      local drawing = State.lines.current_drawing
      local p = drawing.points[drawing.pending.target_point]
      if chord == 'escape' then
        p.name = nil
        record_undo_event(State, {before=before, after=snapshot(State, State.lines.current_drawing_index)})
      elseif chord == 'backspace' then
        local len = utf8.len(p.name)

        local byte_offset = Text.offset(p.name, len-1)
        if len == 1 then byte_offset = 0 end
        p.name = string.sub(p.name, 1, byte_offset)
        record_undo_event(State, {before=before, after=snapshot(State, State.lines.current_drawing_index)})

      end
    end
    schedule_save(State)