Function eventProcess

src/SFML/Window/DRM/InputImpl.cpp:345–537

}

std::optional<sf::Event> eventProcess()
{
    const std::lock_guard lock(inputMutex);

    // Ensure that we are initialized
    initFileDescriptors();

    // This is for handling the Backspace and DEL text events, which we
    // generate based on keystrokes (and not stdin)
    static unsigned int doDeferredText = 0;
    if (doDeferredText)
    {
        const auto event = sf::Event::TextEntered{doDeferredText};

        doDeferredText = 0;
        return event;
    }

    ssize_t bytesRead = 0;

    // Check all the open file descriptors for the next event
    for (auto& fileDescriptor : fileDescriptors)
    {
        input_event inputEvent{};
        bytesRead = read(fileDescriptor, &inputEvent, sizeof(inputEvent));

        while (bytesRead > 0)
        {
            if (inputEvent.type == EV_KEY)
            {
                if (const std::optional<sf::Mouse::Button> mb = toMouseButton(inputEvent.code))
                {
                    mouseMap[*mb] = inputEvent.value;

                    if (inputEvent.value)
                        return sf::Event::MouseButtonPressed{*mb, mousePos};

                    return sf::Event::MouseButtonReleased{*mb, mousePos};
                }

                const sf::Keyboard::Key kb = toKey(inputEvent.code);

                unsigned int special = 0;
                if ((kb == sf::Keyboard::Key::Delete) || (kb == sf::Keyboard::Key::Backspace))
                    special = (kb == sf::Keyboard::Key::Delete) ? 127 : 8;

                if (inputEvent.value == 2)
                {
                    // key repeat events
                    //
                    if (special)
                    {
                        return sf::Event::TextEntered{special};
                    }
                }
                else if (kb != sf::Keyboard::Key::Unknown)
                {
                    // key down and key up events