assert(State.lines[State.cursor1.line].mode == 'text')
  local byte_offset = Text.offset(State.lines[State.cursor1.line].data, State.cursor1.pos)
  State.lines[State.cursor1.line].data = string.sub(State.lines[State.cursor1.line].data, 1, byte_offset-1)..t..string.sub(State.lines[State.cursor1.line].data, byte_offset)
  Text.clear_screen_line_cache(State, State.cursor1.line)
  State.cursor1.pos = State.cursor1.pos+1

        if len > 0 then
          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
    end
    schedule_save(State)
  elseif State.lines.current_drawing and 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)
  elseif State.lines.current_drawing and State.current_drawing_mode == 'name' then
    local before = snapshot(State, State.lines.current_drawing_index)
    local drawing = State.lines.current_drawing
    local p = drawing.points[drawing.pending.target_point]
    p.name = p.name..t
    record_undo_event(State, {before=before, after=snapshot(State, State.lines.current_drawing_index)})
--?   print('text input', t)
  if State.search_term then
    State.search_term = State.search_term..t
    State.search_text = nil
    Text.search_next(State)
--?   print('release', State.cursor1.line)
  if State.lines.current_drawing then
--?   print('press', State.cursor1.line)
  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
        button(State, 'draw', {x=State.left-Margin_left+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 loc1.line > #State.lines then return true end
  local l = State.lines[loc1.line]
  if l.mode ~= 'text' then return false end  -- pos is irrelevant to validity for a drawing line
  return 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)

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

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

  if loc1.line > #State.lines then return true end
  local l = State.lines[loc1.line]
  if l.mode ~= 'text' then return false end  -- pos is irrelevant to validity for a drawing line
  return loc1.pos > #State.lines[loc1.line].data

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

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

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

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

--?   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

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

        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)})

        if len > 0 then
          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