Method help

src/query.cpp:3152–3276

display help page

// display help page
bool Query::help()
{
  Mode oldMode = mode_;

  mode_ = Mode::HELP;

  Screen::clear();
  redraw();

  bool ctrl_q = false; // CTRL-Q is pressed
  bool ctrl_o = false; // CTRL-O is pressed
  bool restart = false; // META key pressed, restart search when exiting the help screen

  while (mode_ == Mode::HELP)
  {
    int key;

    Screen::put(0, Screen::cols - 1, "?");

#ifdef OS_WIN

    while (true)
    {
      key = VKey::in(500);

      if (key > 0)
        break;

      // detect screen size changes
      int rows = Screen::rows;
      int cols = Screen::cols;

      Screen::getsize();

      if (rows != Screen::rows || cols != Screen::cols)
        redraw();
    }

#else

    key = VKey::get();

#endif

    if (ctrl_o)
    {
      meta(key);
      ctrl_o = false;
      restart = true;
    }
    else if (key == VKey::CTRL_Q)
    {
      ctrl_q = true;
      break;
    }
    else if (key == VKey::ESC || key == VKey::CTRL_Z || key == VKey::FN(1))
    {
      break;