love.window.setTitle('capture.love - source')
  love.window.setTitle('lines.love - source - '..Editor_state.filename)

  love.window.setTitle('capture.love - source - '..Editor_state.filename)

    edit.put_cursor_on_next_text_line(State)

    edit.put_cursor_on_first_text_line(State)

    edit.put_cursor_on_next_text_line(State)

end
function edit.put_cursor_on_next_text_line(State)
  while true do
  if State.cursor1.line >= #State.lines then
    break
  end
  if State.lines[State.cursor1.line].mode == 'text' then
    break
  end
  State.cursor1.line = State.cursor1.line+1
  State.cursor1.pos = 1
  end

function edit.put_cursor_on_first_text_line(State)
  for i,line in ipairs(State.lines) do

-- return y drawn until
function edit.draw(State)
  State.button_handlers = {}
  App.color(Text_color)
  if #State.lines ~= #State.line_cache then
    print(('line_cache is out of date; %d when it should be %d'):format(#State.line_cache, #State.lines))
    assert(false)
  end
  if not Text.le1(State.screen_top1, State.cursor1) then
    print(State.screen_top1.line, State.screen_top1.pos, State.cursor1.line, State.cursor1.pos)
    assert(false)
  end
  State.cursor_x = nil
  State.cursor_y = nil
  local y = State.top
  local screen_bottom1 = {line=nil, pos=nil}
--?   print('== draw')
  for line_index = State.screen_top1.line,#State.lines do
    local line = State.lines[line_index]
--?     print('draw:', y, line_index, line)
    if y + State.line_height > App.screen.height then break end
    screen_bottom1.line = line_index
    if line.mode == 'text' then
--?       print('text.draw', y, line_index)
      local startpos = 1
      if line_index == State.screen_top1.line then
        startpos = State.screen_top1.pos
      end
      if line.data == '' then
        -- button to insert new drawing
        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,
        })
      end
      y, screen_bottom1.pos = Text.draw(State, line_index, y, startpos)
--?       print('=> y', y)
    elseif line.mode == 'drawing' then
      y = y+Drawing_padding_top
      Drawing.draw(State, line_index, y)
      y = y + Drawing.pixels(line.h, State.width) + Drawing_padding_bottom
    else
      print(line.mode)
      assert(false)
    end
  end
  State.screen_bottom1 = screen_bottom1
  if State.search_term then
    Text.draw_search_bar(State)
  end
  return y
end
function edit.update(State, dt)
  Drawing.update(State, dt)
  if State.next_save and State.next_save < Current_time then
    save_to_disk(State)
    State.next_save = nil
  end
end
function schedule_save(State)
  if State.next_save == nil then
    State.next_save = Current_time + 3  -- short enough that you're likely to still remember what you did
  end
end
function edit.quit(State)
  -- make sure to save before quitting
  if State.next_save then
    save_to_disk(State)
    -- give some time for the OS to flush everything to disk
    love.timer.sleep(0.1)
  end
end
function edit.mouse_press(State, x,y, mouse_button)
  if State.search_term then return end
--?   print_and_log(('edit.mouse_press: cursor at %d,%d'):format(State.cursor1.line, State.cursor1.pos))
  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
  if y < State.top then
    State.old_cursor1 = State.cursor1
    State.old_selection1 = State.selection1
    State.mousepress_shift = App.shift_down()
    State.selection1 = {
        line=State.screen_top1.line,
        pos=State.screen_top1.pos,
    }
    return
  end
  for line_index,line in ipairs(State.lines) do

      State.cursor1 = {line=i, pos=1}
      break

      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
--?         print_and_log(('edit.mouse_press: in line %d'):format(line_index))
        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),
        }
        return
      end
    elseif line.mode == 'drawing' then
      local line_cache = State.line_cache[line_index]
      if Drawing.in_drawing(line, line_cache, x, y, State.left,State.right) then
        State.lines.current_drawing_index = line_index
        State.lines.current_drawing = line
        Drawing.before = snapshot(State, line_index)
        Drawing.mouse_press(State, line_index, x,y, mouse_button)
        return
      end
    end
  end
  -- still here? click is below all screen lines
  State.old_cursor1 = State.cursor1
  State.old_selection1 = State.selection1
  State.mousepress_shift = App.shift_down()
  State.selection1 = {
      line=State.screen_bottom1.line,
      pos=Text.pos_at_end_of_screen_line(State, State.screen_bottom1),
  }
end
function edit.mouse_release(State, x,y, mouse_button)
  if State.search_term then return end
--?   print_and_log(('edit.mouse_release: cursor at %d,%d'):format(State.cursor1.line, State.cursor1.pos))
  if State.lines.current_drawing then
    Drawing.mouse_release(State, x,y, mouse_button)
    schedule_save(State)
    if Drawing.before then
      record_undo_event(State, {before=Drawing.before, after=snapshot(State, State.lines.current_drawing_index)})
      Drawing.before = nil
    end
  else
--?     print_and_log('edit.mouse_release: no current drawing')
    for line_index,line in ipairs(State.lines) do
      if line.mode == 'text' then
        if Text.in_line(State, line_index, x,y) then
--?           print_and_log(('edit.mouse_release: in line %d'):format(line_index))
          State.cursor1 = {
              line=line_index,
              pos=Text.to_pos_on_line(State, line_index, x, y),
          }
--?           print_and_log(('edit.mouse_release: cursor now %d,%d'):format(State.cursor1.line, State.cursor1.pos))
          if State.mousepress_shift then
            if State.old_selection1.line == nil then
              State.selection1 = State.old_cursor1
            else
              State.selection1 = State.old_selection1
            end
          end
          State.old_cursor1, State.old_selection1, State.mousepress_shift = nil
          if eq(State.cursor1, State.selection1) then
            State.selection1 = {}
          end
          break
        end
      end
    end
--?     print_and_log(('edit.mouse_release: finally selection %s,%s cursor %d,%d'):format(tostring(State.selection1.line), tostring(State.selection1.pos), State.cursor1.line, State.cursor1.pos))
  end
end
function edit.mouse_wheel_move(State, dx,dy)
  if dy > 0 then
    State.cursor1 = {line=State.screen_top1.line, pos=State.screen_top1.pos}
    edit.put_cursor_on_next_text_line(State)
    for i=1,math.floor(dy) do
      Text.up(State)
    end
  elseif dy < 0 then
    State.cursor1 = {line=State.screen_bottom1.line, pos=State.screen_bottom1.pos}
    edit.put_cursor_on_next_text_line(State)
    for i=1,math.floor(-dy) do
      Text.down(State)
    end
  end
end
function edit.text_input(State, t)
--?   print('text input', t)
  if State.search_term then
    State.search_term = State.search_term..t
    Text.search_next(State)
  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)})
  else
    local drawing_index, drawing = Drawing.current_drawing(State)
    if drawing_index == nil then
      for _,line_cache in ipairs(State.line_cache) do line_cache.starty = nil end  -- just in case we scroll
      Text.text_input(State, t)
    end
  end
  schedule_save(State)
end
function edit.keychord_press(State, chord, key)
  if State.selection1.line and
      not State.lines.current_drawing and
      -- printable character created using shift key => delete selection
      -- (we're not creating any ctrl-shift- or alt-shift- combinations using regular/printable keys)
      (not App.shift_down() or utf8.len(key) == 1) and
      chord ~= 'C-a' and chord ~= 'C-c' and chord ~= 'C-x' and chord ~= 'backspace' and chord ~= 'delete' and chord ~= 'C-z' and chord ~= 'C-y' and not App.is_cursor_movement(chord) then
    Text.delete_selection(State, State.left, State.right)
  end
  if State.search_term then
    for _,line_cache in ipairs(State.line_cache) do line_cache.starty = nil end  -- just in case we scroll
    if chord == 'escape' then
      State.search_term = nil
      State.cursor1 = State.search_backup.cursor
      State.screen_top1 = State.search_backup.screen_top
      State.search_backup = nil
      Text.redraw_all(State)  -- if we're scrolling, reclaim all fragments to avoid memory leaks
    elseif chord == 'return' then
      State.search_term = nil
      State.search_backup = nil
    elseif chord == 'backspace' then
      local len = utf8.len(State.search_term)
      local byte_offset = Text.offset(State.search_term, len)
      State.search_term = string.sub(State.search_term, 1, byte_offset-1)
    elseif chord == 'down' then
      State.cursor1.pos = State.cursor1.pos+1
      Text.search_next(State)
    elseif chord == 'up' then
      Text.search_previous(State)
    end
    return
  elseif chord == 'C-f' then
    State.search_term = ''
    State.search_backup = {
      cursor={line=State.cursor1.line, pos=State.cursor1.pos},
      screen_top={line=State.screen_top1.line, pos=State.screen_top1.pos},
    }
  -- zoom
  elseif chord == 'C-=' then
    edit.update_font_settings(State, State.font_height+2)
    Text.redraw_all(State)
  elseif chord == 'C--' then
    if State.font_height > 2 then
      edit.update_font_settings(State, State.font_height-2)
      Text.redraw_all(State)
    end
  elseif chord == 'C-0' then
    edit.update_font_settings(State, 20)
    Text.redraw_all(State)
  -- undo
  elseif chord == 'C-z' then
    for _,line_cache in ipairs(State.line_cache) do line_cache.starty = nil end  -- just in case we scroll
    local event = undo_event(State)
    if event then
      local src = event.before
      State.screen_top1 = deepcopy(src.screen_top)
      State.cursor1 = deepcopy(src.cursor)
      State.selection1 = deepcopy(src.selection)
      patch(State.lines, event.after, event.before)
      patch_placeholders(State.line_cache, event.after, event.before)
      -- invalidate various cached bits of lines
      State.lines.current_drawing = nil
      -- if we're scrolling, reclaim all fragments to avoid memory leaks
      Text.redraw_all(State)
      schedule_save(State)
    end
  elseif chord == 'C-y' then
    for _,line_cache in ipairs(State.line_cache) do line_cache.starty = nil end  -- just in case we scroll
    local event = redo_event(State)
    if event then
      local src = event.after
      State.screen_top1 = deepcopy(src.screen_top)
      State.cursor1 = deepcopy(src.cursor)
      State.selection1 = deepcopy(src.selection)
      patch(State.lines, event.before, event.after)
      -- invalidate various cached bits of lines
      State.lines.current_drawing = nil
      -- if we're scrolling, reclaim all fragments to avoid memory leaks
      Text.redraw_all(State)
      schedule_save(State)
    end
  -- clipboard
  elseif chord == 'C-a' then
    State.selection1 = {line=1, pos=1}
    State.cursor1 = {line=#State.lines, pos=utf8.len(State.lines[#State.lines].data)+1}
  elseif chord == 'C-c' then
    local s = Text.selection(State)
    if s then
      App.set_clipboard(s)
    end
  elseif chord == 'C-x' then
    for _,line_cache in ipairs(State.line_cache) do line_cache.starty = nil end  -- just in case we scroll
    local s = Text.cut_selection(State, State.left, State.right)
    if s then
      App.set_clipboard(s)
    end
    schedule_save(State)
  elseif chord == 'C-v' then
    for _,line_cache in ipairs(State.line_cache) do line_cache.starty = nil end  -- just in case we scroll
    -- We don't have a good sense of when to scroll, so we'll be conservative
    -- and sometimes scroll when we didn't quite need to.
    local before_line = State.cursor1.line
    local before = snapshot(State, before_line)
    local clipboard_data = App.get_clipboard()
    for _,code in utf8.codes(clipboard_data) do
      local c = utf8.char(code)
      if c == '\n' then
        Text.insert_return(State)
      else
        Text.insert_at_cursor(State, c)
      end
    end
    if Text.cursor_out_of_screen(State) then
      Text.snap_cursor_to_bottom_of_screen(State, State.left, State.right)
    end
    schedule_save(State)
    record_undo_event(State, {before=before, after=snapshot(State, before_line, State.cursor1.line)})
  -- dispatch to drawing or text
  elseif App.mouse_down(1) or chord:sub(1,2) == 'C-' then
    -- DON'T reset line_cache.starty here
    local drawing_index, drawing = Drawing.current_drawing(State)
    if drawing_index then
      local before = snapshot(State, drawing_index)
      Drawing.keychord_press(State, chord)
      record_undo_event(State, {before=before, after=snapshot(State, drawing_index)})
      schedule_save(State)
    end
  elseif chord == 'escape' and not App.mouse_down(1) then
    for _,line in ipairs(State.lines) do
      if line.mode == 'drawing' then
        line.show_help = false
      end

  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)
        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)
  else
    for _,line_cache in ipairs(State.line_cache) do line_cache.starty = nil end  -- just in case we scroll
    Text.keychord_press(State, chord)

end
function edit.key_release(State, key, scancode)
end
function edit.update_font_settings(State, font_height)
  State.font_height = font_height
  love.graphics.setFont(love.graphics.newFont(State.font_height))
  State.line_height = math.floor(font_height*1.3)
end
--== some methods for tests
-- Insulate tests from some key globals so I don't have to change the vast
-- majority of tests when they're modified for the real app.
Test_margin_left = 25
Test_margin_right = 0
function edit.initialize_test_state()
  -- if you change these values, tests will start failing
  return edit.initialize_state(
      15,  -- top margin
      Test_margin_left,
      App.screen.width - Test_margin_right,
      14,  -- font height assuming default LÖVE font
      15)  -- line height

  State.button_handlers = {}
  local screen_bottom1 = {line=nil, pos=nil}
                       table.insert(State.line_cache, line_index, {})
    -- give some time for the OS to flush everything to disk
    love.timer.sleep(0.1)
--?         print_and_log(('edit.mouse_press: in line %d'):format(line_index))
--?   print('text input', t)
    for _,line_cache in ipairs(State.line_cache) do line_cache.starty = nil end  -- just in case we scroll
  -- undo
      patch_placeholders(State.line_cache, event.after, event.before)
-- return y drawn until
  if State.lines[State.cursor1.line].mode == 'text' then
    break
  end
  State.cursor1.line = State.cursor1.line+1
  State.cursor1.pos = 1
  end
function edit.put_cursor_on_next_text_line(State)
  while true do
  if State.cursor1.line >= #State.lines then
    break
end
  edit.draw(State)
  edit.update(State, 0)
  App.screen.contents = {}
  edit.mouse_release(State, x,y, mouse_button)
function edit.run_after_mouse_release(State, x,y, mouse_button)
  App.fake_mouse_release(x,y, mouse_button)
  edit.draw(State)
end
  edit.update(State, 0)
  App.screen.contents = {}
  edit.mouse_press(State, x,y, mouse_button)
function edit.run_after_mouse_press(State, x,y, mouse_button)
  App.fake_mouse_press(x,y, mouse_button)
  edit.draw(State)
end
  edit.update(State, 0)
  App.screen.contents = {}
  edit.mouse_release(State, x,y, mouse_button)
  App.fake_mouse_release(x,y, mouse_button)
  edit.mouse_press(State, x,y, mouse_button)
function edit.run_after_mouse_click(State, x,y, mouse_button)
  App.fake_mouse_press(x,y, mouse_button)
  edit.draw(State)
end
  edit.update(State, 0)
  App.screen.contents = {}
  edit.keychord_press(State, chord)
  edit.key_release(State, chord)
function edit.run_after_keychord(State, chord)
-- not all keys are text_input
end
  edit.draw(State)
  edit.update(State, 0)
  App.screen.contents = {}
function edit.run_after_text_input(State, t)
  edit.keychord_press(State, t)
  edit.text_input(State, t)
  edit.key_release(State, t)
-- TODO: handle chords of multiple keys
-- all text_input events are also keypresses
      14,  -- font height assuming default LÖVE font
      15)  -- line height
end
      App.screen.width - Test_margin_right,
function edit.initialize_test_state()
  -- if you change these values, tests will start failing
  return edit.initialize_state(
      15,  -- top margin
      Test_margin_left,
Test_margin_right = 0
Test_margin_left = 25
-- Insulate tests from some key globals so I don't have to change the vast
-- majority of tests when they're modified for the real app.
--== some methods for tests
end
  State.line_height = math.floor(font_height*1.3)
  love.graphics.setFont(love.graphics.newFont(State.font_height))
function edit.update_font_settings(State, font_height)
  State.font_height = font_height
end
function edit.key_release(State, key, scancode)
  end
end
    Text.keychord_press(State, chord)
    for _,line_cache in ipairs(State.line_cache) do line_cache.starty = nil end  -- just in case we scroll
  else
    schedule_save(State)
      end
    end
        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
      elseif chord == 'backspace' then
        local len = utf8.len(p.name)
        record_undo_event(State, {before=before, after=snapshot(State, State.lines.current_drawing_index)})
      local p = drawing.points[drawing.pending.target_point]
      if chord == 'escape' then
        p.name = nil
      local drawing = State.lines.current_drawing
      local before = snapshot(State, State.lines.current_drawing_index)
    else
      State.current_drawing_mode = State.previous_drawing_mode
      State.previous_drawing_mode = nil
    if chord == 'return' then
  elseif State.lines.current_drawing and State.current_drawing_mode == 'name' then
      if line.mode == 'drawing' then
        line.show_help = false
      end
    end
    for _,line in ipairs(State.lines) do
    end
  elseif chord == 'escape' and not App.mouse_down(1) then
      schedule_save(State)
      record_undo_event(State, {before=before, after=snapshot(State, drawing_index)})
      Drawing.keychord_press(State, chord)
      local before = snapshot(State, drawing_index)
    if drawing_index then
    local drawing_index, drawing = Drawing.current_drawing(State)
    -- DON'T reset line_cache.starty here
  -- dispatch to drawing or text
  elseif App.mouse_down(1) or chord:sub(1,2) == 'C-' then
    record_undo_event(State, {before=before, after=snapshot(State, before_line, State.cursor1.line)})
    schedule_save(State)
    end
      Text.snap_cursor_to_bottom_of_screen(State, State.left, State.right)
    if Text.cursor_out_of_screen(State) then
      end
    end
        Text.insert_at_cursor(State, c)
      else
        Text.insert_return(State)
    for _,code in utf8.codes(clipboard_data) do
      local c = utf8.char(code)
      if c == '\n' then
    local clipboard_data = App.get_clipboard()
    local before = snapshot(State, before_line)
    local before_line = State.cursor1.line
    -- We don't have a good sense of when to scroll, so we'll be conservative
    -- and sometimes scroll when we didn't quite need to.
    for _,line_cache in ipairs(State.line_cache) do line_cache.starty = nil end  -- just in case we scroll
  elseif chord == 'C-v' then
    schedule_save(State)
    end
      App.set_clipboard(s)
    if s then
    local s = Text.cut_selection(State, State.left, State.right)
    for _,line_cache in ipairs(State.line_cache) do line_cache.starty = nil end  -- just in case we scroll
    end
  elseif chord == 'C-x' then
      App.set_clipboard(s)
    if s then
    local s = Text.selection(State)
  elseif chord == 'C-c' then
  elseif chord == 'C-a' then
    State.selection1 = {line=1, pos=1}
    State.cursor1 = {line=#State.lines, pos=utf8.len(State.lines[#State.lines].data)+1}
    end
  -- clipboard
      schedule_save(State)
      -- invalidate various cached bits of lines
      State.lines.current_drawing = nil
      -- if we're scrolling, reclaim all fragments to avoid memory leaks
      Text.redraw_all(State)
      State.screen_top1 = deepcopy(src.screen_top)
      State.cursor1 = deepcopy(src.cursor)
      State.selection1 = deepcopy(src.selection)
      patch(State.lines, event.before, event.after)
    if event then
      local src = event.after
    local event = redo_event(State)
    for _,line_cache in ipairs(State.line_cache) do line_cache.starty = nil end  -- just in case we scroll
    end
  elseif chord == 'C-y' then
      schedule_save(State)
      -- invalidate various cached bits of lines
      State.lines.current_drawing = nil
      -- if we're scrolling, reclaim all fragments to avoid memory leaks
      Text.redraw_all(State)
      State.screen_top1 = deepcopy(src.screen_top)
      State.cursor1 = deepcopy(src.cursor)
      State.selection1 = deepcopy(src.selection)
      patch(State.lines, event.after, event.before)
    if event then
      local src = event.before
    local event = undo_event(State)
    for _,line_cache in ipairs(State.line_cache) do line_cache.starty = nil end  -- just in case we scroll
  elseif chord == 'C-z' then
    Text.redraw_all(State)
    edit.update_font_settings(State, 20)
  elseif chord == 'C-0' then
    if State.font_height > 2 then
      edit.update_font_settings(State, State.font_height-2)
      Text.redraw_all(State)
    end
  elseif chord == 'C--' then
    Text.redraw_all(State)
    edit.update_font_settings(State, State.font_height+2)
  elseif chord == 'C-=' then
  -- zoom
    State.search_backup = {
      cursor={line=State.cursor1.line, pos=State.cursor1.pos},
      screen_top={line=State.screen_top1.line, pos=State.screen_top1.pos},
    }
    State.search_term = ''
    end
    return
  elseif chord == 'C-f' then
      Text.search_previous(State)
    elseif chord == 'up' then
      Text.search_next(State)
      State.cursor1.pos = State.cursor1.pos+1
    elseif chord == 'down' then
      local len = utf8.len(State.search_term)
      local byte_offset = Text.offset(State.search_term, len)
      State.search_term = string.sub(State.search_term, 1, byte_offset-1)
    elseif chord == 'backspace' then
      State.search_backup = nil
      State.search_term = nil
    elseif chord == 'return' then
      Text.redraw_all(State)  -- if we're scrolling, reclaim all fragments to avoid memory leaks
      State.cursor1 = State.search_backup.cursor
      State.screen_top1 = State.search_backup.screen_top
      State.search_backup = nil
      State.search_term = nil
    if chord == 'escape' then
  if State.search_term then
  end
    Text.delete_selection(State, State.left, State.right)
      chord ~= 'C-a' and chord ~= 'C-c' and chord ~= 'C-x' and chord ~= 'backspace' and chord ~= 'delete' and chord ~= 'C-z' and chord ~= 'C-y' and not App.is_cursor_movement(chord) then
      -- printable character created using shift key => delete selection
      -- (we're not creating any ctrl-shift- or alt-shift- combinations using regular/printable keys)
      (not App.shift_down() or utf8.len(key) == 1) and
  if State.selection1.line and
      not State.lines.current_drawing and
function edit.keychord_press(State, chord, key)
end
  schedule_save(State)
  end
    end
      Text.text_input(State, t)
    local drawing_index, drawing = Drawing.current_drawing(State)
    if drawing_index == nil then
      for _,line_cache in ipairs(State.line_cache) do line_cache.starty = nil end  -- just in case we scroll
  else
    record_undo_event(State, {before=before, after=snapshot(State, State.lines.current_drawing_index)})
    local p = drawing.points[drawing.pending.target_point]
    p.name = p.name..t
    local drawing = State.lines.current_drawing
    local before = snapshot(State, State.lines.current_drawing_index)
  elseif State.lines.current_drawing and State.current_drawing_mode == 'name' then
    Text.search_next(State)
  if State.search_term then
    State.search_term = State.search_term..t
function edit.text_input(State, t)
  end
end
    for i=1,math.floor(-dy) do
      Text.down(State)
    end
    edit.put_cursor_on_next_text_line(State)
    State.cursor1 = {line=State.screen_bottom1.line, pos=State.screen_bottom1.pos}
  elseif dy < 0 then
    for i=1,math.floor(dy) do
      Text.up(State)
    end
    edit.put_cursor_on_next_text_line(State)
  end
end
function edit.mouse_wheel_move(State, dx,dy)
  if dy > 0 then
    State.cursor1 = {line=State.screen_top1.line, pos=State.screen_top1.pos}
--?     print_and_log(('edit.mouse_release: finally selection %s,%s cursor %d,%d'):format(tostring(State.selection1.line), tostring(State.selection1.pos), State.cursor1.line, State.cursor1.pos))
          end
          break
        end
      end
    end
          State.old_cursor1, State.old_selection1, State.mousepress_shift = nil
          if eq(State.cursor1, State.selection1) then
            State.selection1 = {}
            end
          end
              State.selection1 = State.old_selection1
            else
          if State.mousepress_shift then
            if State.old_selection1.line == nil then
              State.selection1 = State.old_cursor1
--?           print_and_log(('edit.mouse_release: cursor now %d,%d'):format(State.cursor1.line, State.cursor1.pos))
          }
              pos=Text.to_pos_on_line(State, line_index, x, y),
              line=line_index,
          State.cursor1 = {
--?           print_and_log(('edit.mouse_release: in line %d'):format(line_index))
        if Text.in_line(State, line_index, x,y) then
      if line.mode == 'text' then
    for line_index,line in ipairs(State.lines) do
--?     print_and_log('edit.mouse_release: no current drawing')
      Drawing.before = nil
    end
  else
      record_undo_event(State, {before=Drawing.before, after=snapshot(State, State.lines.current_drawing_index)})
    if Drawing.before then
    schedule_save(State)
    Drawing.mouse_release(State, x,y, mouse_button)
  if State.lines.current_drawing then
--?   print_and_log(('edit.mouse_release: cursor at %d,%d'):format(State.cursor1.line, State.cursor1.pos))
  if State.search_term then return end
function edit.mouse_release(State, x,y, mouse_button)
end
  -- still here? click is below all screen lines
  State.old_cursor1 = State.cursor1
  State.old_selection1 = State.selection1
  State.mousepress_shift = App.shift_down()
  State.selection1 = {
      line=State.screen_bottom1.line,
      pos=Text.pos_at_end_of_screen_line(State, State.screen_bottom1),
  }
      end
    end
  end
        return
        Drawing.mouse_press(State, line_index, x,y, mouse_button)
        Drawing.before = snapshot(State, line_index)
        State.lines.current_drawing_index = line_index
        State.lines.current_drawing = line
      local line_cache = State.line_cache[line_index]
      if Drawing.in_drawing(line, line_cache, x, y, State.left,State.right) then
      end
    elseif line.mode == 'drawing' then
        return
        }
            pos=Text.to_pos_on_line(State, line_index, x, y),
            line=line_index,
        State.old_cursor1 = State.cursor1
        State.old_selection1 = State.selection1
        State.mousepress_shift = App.shift_down()
        State.selection1 = {
        --    i.e. mouse_release should never look at shift state
        -- 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
      if Text.in_line(State, line_index, x,y) then
    if line.mode == 'text' then
  for line_index,line in ipairs(State.lines) do
    }
    return
  end
        line=State.screen_top1.line,
        pos=State.screen_top1.pos,
  if y < State.top then
    State.old_cursor1 = State.cursor1
    State.old_selection1 = State.selection1
    State.mousepress_shift = App.shift_down()
    State.selection1 = {
    -- press on a button and it returned 'true' to short-circuit
    return
  end
  if mouse_press_consumed_by_any_button_handler(State, x,y, mouse_button) then
--?   print_and_log(('edit.mouse_press: cursor at %d,%d'):format(State.cursor1.line, State.cursor1.pos))
  if State.search_term then return end
function edit.mouse_press(State, x,y, mouse_button)
  end
end
    save_to_disk(State)
  if State.next_save then
  -- make sure to save before quitting
function edit.quit(State)
  end
end
    State.next_save = Current_time + 3  -- short enough that you're likely to still remember what you did
function schedule_save(State)
  if State.next_save == nil then
  end
end
    State.next_save = nil
    save_to_disk(State)
  if State.next_save and State.next_save < Current_time then
  Drawing.update(State, dt)
function edit.update(State, dt)
end
  return y
  end
    Text.draw_search_bar(State)
  if State.search_term then
  State.screen_bottom1 = screen_bottom1
  end
    end
      print(line.mode)
      assert(false)
    else
      y = y + Drawing.pixels(line.h, State.width) + Drawing_padding_bottom
      Drawing.draw(State, line_index, y)
      y = y+Drawing_padding_top
    elseif line.mode == 'drawing' then
--?       print('=> y', y)
      y, screen_bottom1.pos = Text.draw(State, line_index, y, startpos)
      end
                     end,
        })
                       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)})
          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={}})
        button(State, 'draw', {x=State.left-Margin_left+4, y=y+4, w=12,h=12, color={1,1,0},
      end
      if line.data == '' then
        -- button to insert new drawing
        startpos = State.screen_top1.pos
      if line_index == State.screen_top1.line then
      local startpos = 1
    if line.mode == 'text' then
--?       print('text.draw', y, line_index)
    screen_bottom1.line = line_index
    if y + State.line_height > App.screen.height then break end
--?     print('draw:', y, line_index, line)
  for line_index = State.screen_top1.line,#State.lines do
    local line = State.lines[line_index]
--?   print('== draw')
  local y = State.top
  State.cursor_x = nil
  State.cursor_y = nil
  if not Text.le1(State.screen_top1, State.cursor1) then
    print(State.screen_top1.line, State.screen_top1.pos, State.cursor1.line, State.cursor1.pos)
    assert(false)
  end
  if #State.lines ~= #State.line_cache then
    print(('line_cache is out of date; %d when it should be %d'):format(#State.line_cache, #State.lines))
    assert(false)
  end
  App.color(Text_color)
function edit.draw(State)

-- all text_input events are also keypresses
-- TODO: handle chords of multiple keys
function edit.run_after_text_input(State, t)
  edit.keychord_press(State, t)
  edit.text_input(State, t)
  edit.key_release(State, t)
  App.screen.contents = {}
  edit.update(State, 0)
  edit.draw(State)
end
-- not all keys are text_input
function edit.run_after_keychord(State, chord)
  edit.keychord_press(State, chord)
  edit.key_release(State, chord)
  App.screen.contents = {}
  edit.update(State, 0)
  edit.draw(State)
end
function edit.run_after_mouse_click(State, x,y, mouse_button)
  App.fake_mouse_press(x,y, mouse_button)
  edit.mouse_press(State, x,y, mouse_button)
  App.fake_mouse_release(x,y, mouse_button)
  edit.mouse_release(State, x,y, mouse_button)
  App.screen.contents = {}
  edit.update(State, 0)
  edit.draw(State)
end
function edit.run_after_mouse_press(State, x,y, mouse_button)
  App.fake_mouse_press(x,y, mouse_button)
  edit.mouse_press(State, x,y, mouse_button)
  App.screen.contents = {}
  edit.update(State, 0)
  edit.draw(State)
end
function edit.run_after_mouse_release(State, x,y, mouse_button)
  App.fake_mouse_release(x,y, mouse_button)
  edit.mouse_release(State, x,y, mouse_button)
  App.screen.contents = {}
  edit.update(State, 0)
  edit.draw(State)
end