qtbase/src/plugins/platforms/wayland/qwaylanddisplay.cpp

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#include "qwaylanddisplay_p.h"

#include "qwaylandeventthread_p.h"
#include "qwaylandintegration_p.h"
#include "qwaylandwindow_p.h"
#include "qwaylandscreen_p.h"
#include "qwaylandcursor_p.h"
#include "qwaylandinputdevice_p.h"
#include "qwaylandclipboard_p.h"
#include "qwaylanddatadevicemanager_p.h"
#include "qwaylandhardwareintegration_p.h"
#include "qwaylandxdgshell_p.h"

#include "qwaylandwindowmanagerintegration_p.h"

#include "qwaylandextendedoutput_p.h"
#include "qwaylandextendedsurface_p.h"
#include "qwaylandsubsurface_p.h"
#include "qwaylandtouch_p.h"
#include "qwaylandqtkey_p.h"

#include <QtWaylandClient/private/qwayland-text.h>
#include <QtWaylandClient/private/qwayland-xdg-shell.h>

#include <QtCore/QAbstractEventDispatcher>
#include <QtGui/private/qguiapplication_p.h>

#include <QtCore/QDebug>

#include <errno.h>

QT_BEGIN_NAMESPACE

struct wl_surface *QWaylandDisplay::createSurface(void *handle)
{
    struct wl_surface *surface = mCompositor.create_surface();
    wl_surface_set_user_data(surface, handle);
    return surface;
}

QWaylandClientBufferIntegration * QWaylandDisplay::clientBufferIntegration() const
{
    return mWaylandIntegration->clientBufferIntegration();
}

QWaylandWindowManagerIntegration *QWaylandDisplay::windowManagerIntegration() const
{
    return mWindowManagerIntegration.data();
}

QWaylandInputDevice *QWaylandDisplay::lastKeyboardFocusInputDevice() const
{
    return mLastKeyboardFocusInputDevice;
}

void QWaylandDisplay::setLastKeyboardFocusInputDevice(QWaylandInputDevice *device)
{
    mLastKeyboardFocusInputDevice = device;
}

static QWaylandDisplay *display = 0;

QWaylandDisplay::QWaylandDisplay(QWaylandIntegration *waylandIntegration)
    : mWaylandIntegration(waylandIntegration)
    , mLastKeyboardFocusInputDevice(0)
    , mDndSelectionHandler(0)
    , mWindowExtension(0)
    , mSubSurfaceExtension(0)
    , mOutputExtension(0)
    , mTouchExtension(0)
    , mQtKeyExtension(0)
    , mTextInputManager(0)
    , mHardwareIntegration(0)
{
    display = this;
    qRegisterMetaType<uint32_t>("uint32_t");

    mEventThreadObject = new QWaylandEventThread(0);
    mEventThread = new QThread(this);
    mEventThread->setObjectName(QStringLiteral("QtWayland"));
    mEventThreadObject->moveToThread(mEventThread);
    mEventThread->start();

    mEventThreadObject->displayConnect();
    mDisplay = mEventThreadObject->display(); //blocks until display is available

    //Create a new even queue for the QtGui thread
    mEventQueue = wl_display_create_queue(mDisplay);

    struct ::wl_registry *registry = wl_display_get_registry(mDisplay);
    wl_proxy_set_queue((struct wl_proxy *)registry, mEventQueue);

    init(registry);

    connect(mEventThreadObject, SIGNAL(newEventsRead()), this, SLOT(flushRequests()));

    mWindowManagerIntegration.reset(new QWaylandWindowManagerIntegration(this));

    blockingReadEvents();

    waitForScreens();
}

QWaylandDisplay::~QWaylandDisplay(void)
{
    delete mDndSelectionHandler.take();
    mEventThread->quit();
    mEventThread->wait();
    delete mEventThreadObject;
}

void QWaylandDisplay::flushRequests()
{
    if (wl_display_dispatch_queue_pending(mDisplay, mEventQueue) == -1 && (errno == EPIPE || errno == ECONNRESET)) {
        qWarning("The Wayland connection broke. Did the Wayland compositor die?");
        ::exit(1);
    }
    wl_display_flush(mDisplay);
}


void QWaylandDisplay::blockingReadEvents()
{
    if (wl_display_dispatch_queue(mDisplay, mEventQueue) == -1 && (errno == EPIPE || errno == ECONNRESET)) {
        qWarning("The Wayland connection broke. Did the Wayland compositor die?");
        ::exit(1);
    }
}

QWaylandScreen *QWaylandDisplay::screenForOutput(struct wl_output *output) const
{
    for (int i = 0; i < mScreens.size(); ++i) {
        QWaylandScreen *screen = static_cast<QWaylandScreen *>(mScreens.at(i));
        if (screen->output() == output)
            return screen;
    }
    return 0;
}

void QWaylandDisplay::waitForScreens()
{
    flushRequests();

    while (true) {
        bool screensReady = !mScreens.isEmpty();

        for (int ii = 0; screensReady && ii < mScreens.count(); ++ii) {
            if (mScreens.at(ii)->geometry() == QRect(0, 0, 0, 0))
                screensReady = false;
        }

        if (!screensReady)
            blockingReadEvents();
        else
            return;
    }
}

void QWaylandDisplay::registry_global(uint32_t id, const QString &interface, uint32_t version)
{
    Q_UNUSED(version);

    struct ::wl_registry *registry = object();

    if (interface == QStringLiteral("wl_output")) {
        mScreens.append(new QWaylandScreen(this, id));
    } else if (interface == QStringLiteral("wl_compositor")) {
        mCompositor.init(registry, id);
    } else if (interface == QStringLiteral("wl_shm")) {
        mShm = static_cast<struct wl_shm *>(wl_registry_bind(registry, id, &wl_shm_interface,1));
    } else if (interface == QStringLiteral("xdg_shell")
               && qEnvironmentVariableIsSet("QT_WAYLAND_USE_XDG_SHELL")) {
        mShellXdg.reset(new QWaylandXdgShell(registry,id));
    } else if (interface == QStringLiteral("wl_shell")){
        mShell.reset(new QtWayland::wl_shell(registry, id));
    } else if (interface == QStringLiteral("wl_seat")) {
        QWaylandInputDevice *inputDevice = new QWaylandInputDevice(this, id);
        mInputDevices.append(inputDevice);
    } else if (interface == QStringLiteral("wl_data_device_manager")) {
        mDndSelectionHandler.reset(new QWaylandDataDeviceManager(this, id));
    } else if (interface == QStringLiteral("qt_output_extension")) {
        mOutputExtension.reset(new QtWayland::qt_output_extension(registry, id));
        foreach (QPlatformScreen *screen, screens())
            static_cast<QWaylandScreen *>(screen)->createExtendedOutput();
    } else if (interface == QStringLiteral("qt_surface_extension")) {
        mWindowExtension.reset(new QtWayland::qt_surface_extension(registry, id));
    } else if (interface == QStringLiteral("qt_sub_surface_extension")) {
        mSubSurfaceExtension.reset(new QtWayland::qt_sub_surface_extension(registry, id));
    } else if (interface == QStringLiteral("qt_touch_extension")) {
        mTouchExtension.reset(new QWaylandTouchExtension(this, id));
    } else if (interface == QStringLiteral("qt_key_extension")) {
        mQtKeyExtension.reset(new QWaylandQtKeyExtension(this, id));
    } else if (interface == QStringLiteral("wl_text_input_manager")) {
        mTextInputManager.reset(new QtWayland::wl_text_input_manager(registry, id));
    } else if (interface == QStringLiteral("qt_hardware_integration")) {
        mHardwareIntegration.reset(new QWaylandHardwareIntegration(registry, id));
    }

    mGlobals.append(RegistryGlobal(id, interface, version, registry));

    foreach (Listener l, mRegistryListeners)
        (*l.listener)(l.data, registry, id, interface, version);
}

void QWaylandDisplay::registry_global_remove(uint32_t id)
{
    for (int i = 0, ie = mGlobals.count(); i != ie; ++i) {
        if (mGlobals[i].id == id) {
            mGlobals.removeAt(i);
            break;
        }
    }
}

void QWaylandDisplay::addRegistryListener(RegistryListener listener, void *data)
{
    Listener l = { listener, data };
    mRegistryListeners.append(l);
    for (int i = 0, ie = mGlobals.count(); i != ie; ++i)
        (*l.listener)(l.data, mGlobals[i].registry, mGlobals[i].id, mGlobals[i].interface, mGlobals[i].version);
}

uint32_t QWaylandDisplay::currentTimeMillisec()
{
    //### we throw away the time information
    struct timeval tv;
    int ret = gettimeofday(&tv, 0);
    if (ret == 0)
        return tv.tv_sec*1000 + tv.tv_usec/1000;
    return 0;
}

void QWaylandDisplay::forceRoundTrip()
{
    wl_display_roundtrip(mDisplay);
}

QtWayland::xdg_shell *QWaylandDisplay::shellXdg()
{
    return mShellXdg.data();
}

QT_END_NAMESPACE