function Text.text_input(State, t)
  if App.mouse_down(1) then return end
  if App.any_modifier_down() then
    if App.key_down(t) then
      -- The modifiers didn't change the key. Handle it in keychord_pressed.
      return
    else
      -- Key mutated by the keyboard layout. Continue below.
    end
  end
end
-- Don't handle any keys here that would trigger text_input above.