Cursor1.pos = screen_line_starting_pos + Text.nearest_cursor_pos(s, Cursor_x) - 1

        Cursor1.pos = screen_line_starting_pos + Text.nearest_cursor_pos(s, Cursor_x, left) - 1

    Cursor1.pos = new_screen_line_starting_pos + Text.nearest_cursor_pos(s, Cursor_x) - 1

    Cursor1.pos = new_screen_line_starting_pos + Text.nearest_cursor_pos(s, Cursor_x, left) - 1

        Cursor1.pos = Text.nearest_cursor_pos(Lines[Cursor1.line].data, Cursor_x)

        Cursor1.pos = Text.nearest_cursor_pos(Lines[Cursor1.line].data, Cursor_x, left)

    Cursor1.pos = new_screen_line_starting_pos + Text.nearest_cursor_pos(s, Cursor_x) - 1

    Cursor1.pos = new_screen_line_starting_pos + Text.nearest_cursor_pos(s, Cursor_x, left) - 1

--?       print('return', mx, Text.nearest_cursor_pos(s, mx), '=>', screen_line_starting_pos + Text.nearest_cursor_pos(s, mx) - 1)
      return screen_line_starting_pos + Text.nearest_cursor_pos(s, mx) - 1

--?       print('return', mx, Text.nearest_cursor_pos(s, mx, left), '=>', screen_line_starting_pos + Text.nearest_cursor_pos(s, mx, left) - 1)
      return screen_line_starting_pos + Text.nearest_cursor_pos(s, mx, left) - 1

function Text.nearest_cursor_pos(line, x)  -- x includes left margin

-- convert x pixel coordinate to pos
-- oblivious to wrapping
function Text.nearest_cursor_pos(line, x, left)

  local max_x = Margin_left+Text.x(line, len+1)

  local max_x = left+Text.x(line, len+1)

    local currxmin = Margin_left+Text.x(line, curr)
    local currxmax = Margin_left+Text.x(line, curr+1)

    local currxmin = left+Text.x(line, curr)
    local currxmax = left+Text.x(line, curr+1)