Merge remote-tracking branch 'origin/5.14' into 5.15

Change-Id: I1fdf822938737aebe0c13a2eba9e478ba8f8ba14

src/plugins/platforms/wayland/configure.json

@@ -140,7 +140,7 @@
         },
         "xcomposite-egl": {
             "label": "XComposite EGL",
-            "condition": "features.wayland-client && features.opengl && features.egl && features.xlib && libs.xcomposite",
+            "condition": "features.wayland-client && features.opengl && features.egl && features.xlib && libs.xcomposite && features.egl_x11",
             "output": [ "privateFeature" ]
         },
         "xcomposite-glx": {

src/plugins/platforms/wayland/plugins/shellintegration/xdg-shell-v6/qwaylandxdgshellv6.cpp

@@ -342,7 +342,7 @@ void QWaylandXdgSurfaceV6::requestWindowStates(Qt::WindowStates states)
     if (m_toplevel)
         m_toplevel->requestWindowStates(states);
     else
-        qCWarning(lcQpaWayland) << "Non-toplevel surfaces can't request window states";
+        qCDebug(lcQpaWayland) << "Ignoring window states requested by non-toplevel.";
 }
 
 void QWaylandXdgSurfaceV6::setToplevel()

src/plugins/platforms/wayland/plugins/shellintegration/xdg-shell/qwaylandxdgshell.cpp

@@ -377,7 +377,7 @@ void QWaylandXdgSurface::requestWindowStates(Qt::WindowStates states)
     if (m_toplevel)
         m_toplevel->requestWindowStates(states);
     else
-        qCWarning(lcQpaWayland) << "Non-toplevel surfaces can't request window states";
+        qCDebug(lcQpaWayland) << "Ignoring window states requested by non-toplevel zxdg_surface_v6.";
 }
 
 void QWaylandXdgSurface::setToplevel()

src/plugins/platforms/wayland/qwaylanddatadevice.cpp

@@ -103,20 +103,23 @@ QWaylandDataOffer *QWaylandDataDevice::dragOffer() const
     return m_dragOffer.data();
 }
 
-void QWaylandDataDevice::startDrag(QMimeData *mimeData, QWaylandWindow *icon)
+bool QWaylandDataDevice::startDrag(QMimeData *mimeData, QWaylandWindow *icon)
 {
-    m_dragSource.reset(new QWaylandDataSource(m_display->dndSelectionHandler(), mimeData));
-    connect(m_dragSource.data(), &QWaylandDataSource::cancelled, this, &QWaylandDataDevice::dragSourceCancelled);
-
     auto *seat = m_display->currentInputDevice();
     auto *origin = seat->pointerFocus();
     if (!origin)
         origin = seat->touchFocus();
 
-    if (origin)
-        start_drag(m_dragSource->object(), origin->wlSurface(), icon->wlSurface(), m_display->currentInputDevice()->serial());
-    else
+    if (!origin) {
         qCDebug(lcQpaWayland) << "Couldn't start a drag because the origin window could not be found.";
+        return false;
+    }
+
+    m_dragSource.reset(new QWaylandDataSource(m_display->dndSelectionHandler(), mimeData));
+    connect(m_dragSource.data(), &QWaylandDataSource::cancelled, this, &QWaylandDataDevice::dragSourceCancelled);
+
+    start_drag(m_dragSource->object(), origin->wlSurface(), icon->wlSurface(), m_display->currentInputDevice()->serial());
+    return true;
 }
 
 void QWaylandDataDevice::cancelDrag()

src/plugins/platforms/wayland/qwaylanddatadevice_p.h

@@ -89,7 +89,7 @@ public:
 
 #if QT_CONFIG(draganddrop)
     QWaylandDataOffer *dragOffer() const;
-    void startDrag(QMimeData *mimeData, QWaylandWindow *icon);
+    bool startDrag(QMimeData *mimeData, QWaylandWindow *icon);
     void cancelDrag();
 #endif
 

src/plugins/platforms/wayland/qwaylanddnd.cpp

@@ -66,8 +66,13 @@ void QWaylandDrag::startDrag()
 {
     QBasicDrag::startDrag();
     QWaylandWindow *icon = static_cast<QWaylandWindow *>(shapedPixmapWindow()->handle());
-    m_display->currentInputDevice()->dataDevice()->startDrag(drag()->mimeData(), icon);
-    icon->addAttachOffset(-drag()->hotSpot());
+    if (m_display->currentInputDevice()->dataDevice()->startDrag(drag()->mimeData(), icon)) {
+        icon->addAttachOffset(-drag()->hotSpot());
+    } else {
+        // Cancelling immediately does not work, since the event loop for QDrag::exec is started
+        // after this function returns.
+        QMetaObject::invokeMethod(this, [this](){ cancelDrag(); }, Qt::QueuedConnection);
+    }
 }
 
 void QWaylandDrag::cancel()

src/plugins/platforms/wayland/qwaylandinputcontext.cpp

@@ -119,7 +119,8 @@ void QWaylandTextInput::updateState(Qt::InputMethodQueries queries, uint32_t fla
     if (!QGuiApplication::focusWindow() || !QGuiApplication::focusWindow()->handle())
         return;
 
-    auto *surface = static_cast<QWaylandWindow *>(QGuiApplication::focusWindow()->handle())->wlSurface();
+    auto *window = static_cast<QWaylandWindow *>(QGuiApplication::focusWindow()->handle());
+    auto *surface = window->wlSurface();
     if (!surface || (surface != m_surface))
         return;
 
@@ -157,8 +158,10 @@ void QWaylandTextInput::updateState(Qt::InputMethodQueries queries, uint32_t fla
 
     if (queries & Qt::ImCursorRectangle) {
         const QRect &cRect = event.value(Qt::ImCursorRectangle).toRect();
-        const QRect &tRect = QGuiApplication::inputMethod()->inputItemTransform().mapRect(cRect);
-        set_cursor_rectangle(tRect.x(), tRect.y(), tRect.width(), tRect.height());
+        const QRect &windowRect = QGuiApplication::inputMethod()->inputItemTransform().mapRect(cRect);
+        const QMargins margins = window->frameMargins();
+        const QRect &surfaceRect = windowRect.translated(margins.left(), margins.top());
+        set_cursor_rectangle(surfaceRect.x(), surfaceRect.y(), surfaceRect.width(), surfaceRect.height());
     }
 
     if (queries & Qt::ImPreferredLanguage) {

src/plugins/platforms/wayland/qwaylandinputdevice.cpp

@@ -1200,7 +1200,7 @@ void QWaylandInputDevice::Keyboard::keyboard_key(uint32_t serial, uint32_t time,
         QEvent::Type type = isDown ? QEvent::KeyPress : QEvent::KeyRelease;
         handleKey(time, type, qtkey, modifiers, code, sym, mNativeModifiers, text);
 
-        if (state == WL_KEYBOARD_KEY_STATE_PRESSED && xkb_keymap_key_repeats(mXkbKeymap.get(), code)) {
+        if (state == WL_KEYBOARD_KEY_STATE_PRESSED && xkb_keymap_key_repeats(mXkbKeymap.get(), code) && mRepeatRate > 0) {
             mRepeatKey.key = qtkey;
             mRepeatKey.code = code;
             mRepeatKey.time = time;
@@ -1295,34 +1295,40 @@ void QWaylandInputDevice::Touch::touch_down(uint32_t serial,
     mParent->mSerial = serial;
     mFocus = window;
     mParent->mQDisplay->setLastInputDevice(mParent, serial, mFocus);
-    mParent->handleTouchPoint(id, wl_fixed_to_double(x), wl_fixed_to_double(y), Qt::TouchPointPressed);
+    QPointF position(wl_fixed_to_double(x), wl_fixed_to_double(y));
+    mParent->handleTouchPoint(id, Qt::TouchPointPressed, position);
 }
 
 void QWaylandInputDevice::Touch::touch_up(uint32_t serial, uint32_t time, int32_t id)
 {
     Q_UNUSED(serial);
     Q_UNUSED(time);
-    mFocus = nullptr;
-    mParent->handleTouchPoint(id, 0, 0, Qt::TouchPointReleased);
+    mParent->handleTouchPoint(id, Qt::TouchPointReleased);
 
-    // As of Weston 1.5.90 there is no touch_frame after the last touch_up
-    // (i.e. when the last finger is released). To accommodate for this, issue a
-    // touch_frame. This cannot hurt since it is safe to call the touch_frame
-    // handler multiple times when there are no points left.
-    if (allTouchPointsReleased())
+    if (allTouchPointsReleased()) {
+        mFocus = nullptr;
+
+        // As of Weston 7.0.0 there is no touch_frame after the last touch_up
+        // (i.e. when the last finger is released). To accommodate for this, issue a
+        // touch_frame. This cannot hurt since it is safe to call the touch_frame
+        // handler multiple times when there are no points left.
+        // See: https://gitlab.freedesktop.org/wayland/weston/issues/44
+        // TODO: change logging category to lcQpaWaylandInput in newer versions.
+        qCDebug(lcQpaWayland, "Generating fake frame event to work around Weston bug");
         touch_frame();
+    }
 }
 
 void QWaylandInputDevice::Touch::touch_motion(uint32_t time, int32_t id, wl_fixed_t x, wl_fixed_t y)
 {
     Q_UNUSED(time);
-    mParent->handleTouchPoint(id, wl_fixed_to_double(x), wl_fixed_to_double(y), Qt::TouchPointMoved);
+    QPointF position(wl_fixed_to_double(x), wl_fixed_to_double(y));
+    mParent->handleTouchPoint(id, Qt::TouchPointMoved, position);
 }
 
 void QWaylandInputDevice::Touch::touch_cancel()
 {
-    mPrevTouchPoints.clear();
-    mTouchPoints.clear();
+    mPendingTouchPoints.clear();
 
     QWaylandTouchExtension *touchExt = mParent->mQDisplay->touchExtension();
     if (touchExt)
@@ -1331,22 +1337,18 @@ void QWaylandInputDevice::Touch::touch_cancel()
     QWindowSystemInterface::handleTouchCancelEvent(nullptr, mParent->mTouchDevice);
 }
 
-void QWaylandInputDevice::handleTouchPoint(int id, double x, double y, Qt::TouchPointState state)
+void QWaylandInputDevice::handleTouchPoint(int id, Qt::TouchPointState state, const QPointF &surfacePosition)
 {
-    QWindowSystemInterface::TouchPoint tp;
+    auto end = mTouch->mPendingTouchPoints.end();
+    auto it = std::find_if(mTouch->mPendingTouchPoints.begin(), end, [id](auto tp){ return tp.id == id; });
+    if (it == end) {
+        it = mTouch->mPendingTouchPoints.insert(end, QWindowSystemInterface::TouchPoint());
+        it->id = id;
+    }
+    QWindowSystemInterface::TouchPoint &tp = *it;
 
-    // Find out the coordinates for Released events.
-    bool coordsOk = false;
-    if (state == Qt::TouchPointReleased)
-        for (int i = 0; i < mTouch->mPrevTouchPoints.count(); ++i)
-            if (mTouch->mPrevTouchPoints.at(i).id == id) {
-                tp.area = mTouch->mPrevTouchPoints.at(i).area;
-                coordsOk = true;
-                break;
-            }
-
-    if (!coordsOk) {
-        // x and y are surface relative.
+    // Only moved and pressed needs to update/set position
+    if (state == Qt::TouchPointMoved || state == Qt::TouchPointPressed) {
         // We need a global (screen) position.
         QWaylandWindow *win = mTouch->mFocus;
 
@@ -1360,63 +1362,46 @@ void QWaylandInputDevice::handleTouchPoint(int id, double x, double y, Qt::Touch
 
         tp.area = QRectF(0, 0, 8, 8);
         QMargins margins = win->frameMargins();
-        tp.area.moveCenter(win->window()->mapToGlobal(QPoint(x - margins.left(), y - margins.top())));
+        QPointF localPosition = surfacePosition - QPointF(margins.left(), margins.top());
+        // TODO: This doesn't account for high dpi scaling for the delta, but at least it matches
+        // what we have for mouse input.
+        QPointF delta = localPosition - localPosition.toPoint();
+        QPointF globalPosition = win->window()->mapToGlobal(localPosition.toPoint()) + delta;
+        tp.area.moveCenter(globalPosition);
     }
 
     tp.state = state;
-    tp.id = id;
     tp.pressure = tp.state == Qt::TouchPointReleased ? 0 : 1;
-    mTouch->mTouchPoints.append(tp);
 }
 
 bool QWaylandInputDevice::Touch::allTouchPointsReleased()
 {
-    for (int i = 0; i < mTouchPoints.count(); ++i)
-        if (mTouchPoints.at(i).state != Qt::TouchPointReleased)
+    for (const auto &tp : qAsConst(mPendingTouchPoints)) {
+        if (tp.state != Qt::TouchPointReleased)
             return false;
-
+    }
     return true;
 }
 
 void QWaylandInputDevice::Touch::releasePoints()
 {
-    for (const QWindowSystemInterface::TouchPoint &previousPoint : qAsConst(mPrevTouchPoints)) {
-        QWindowSystemInterface::TouchPoint tp = previousPoint;
+    if (mPendingTouchPoints.empty())
+        return;
+
+    for (QWindowSystemInterface::TouchPoint &tp : mPendingTouchPoints)
         tp.state = Qt::TouchPointReleased;
-        mTouchPoints.append(tp);
-    }
+
     touch_frame();
 }
 
 void QWaylandInputDevice::Touch::touch_frame()
 {
-    // Copy all points, that are in the previous but not in the current list, as stationary.
-    for (int i = 0; i < mPrevTouchPoints.count(); ++i) {
-        const QWindowSystemInterface::TouchPoint &prevPoint(mPrevTouchPoints.at(i));
-        if (prevPoint.state == Qt::TouchPointReleased)
-            continue;
-        bool found = false;
-        for (int j = 0; j < mTouchPoints.count(); ++j)
-            if (mTouchPoints.at(j).id == prevPoint.id) {
-                found = true;
-                break;
-            }
-        if (!found) {
-            QWindowSystemInterface::TouchPoint p = prevPoint;
-            p.state = Qt::TouchPointStationary;
-            mTouchPoints.append(p);
-        }
-    }
-
-    if (mTouchPoints.isEmpty()) {
-        mPrevTouchPoints.clear();
-        return;
-    }
+    // TODO: early return if no events?
 
     QWindow *window = mFocus ? mFocus->window() : nullptr;
 
     if (mFocus) {
-        const QWindowSystemInterface::TouchPoint &tp = mTouchPoints.last();
+        const QWindowSystemInterface::TouchPoint &tp = mPendingTouchPoints.last();
         // When the touch event is received, the global pos is calculated with the margins
         // in mind. Now we need to adjust again to get the correct local pos back.
         QMargins margins = window->frameMargins();
@@ -1425,14 +1410,21 @@ void QWaylandInputDevice::Touch::touch_frame()
         if (mFocus->touchDragDecoration(mParent, localPos, tp.area.center(), tp.state, mParent->modifiers()))
             return;
     }
-    QWindowSystemInterface::handleTouchEvent(window, mParent->mTouchDevice, mTouchPoints);
 
-    if (allTouchPointsReleased())
-        mPrevTouchPoints.clear();
-    else
-        mPrevTouchPoints = mTouchPoints;
+    QWindowSystemInterface::handleTouchEvent(window, mParent->mTouchDevice, mPendingTouchPoints);
+
+    // Prepare state for next frame
+    const auto prevTouchPoints = mPendingTouchPoints;
+    mPendingTouchPoints.clear();
+    for (const auto &prevPoint: prevTouchPoints) {
+        // All non-released touch points should be part of the next touch event
+        if (prevPoint.state != Qt::TouchPointReleased) {
+            QWindowSystemInterface::TouchPoint tp = prevPoint;
+            tp.state = Qt::TouchPointStationary; // ... as stationary (unless proven otherwise)
+            mPendingTouchPoints.append(tp);
+        }
+    }
 
-    mTouchPoints.clear();
 }
 
 }

src/plugins/platforms/wayland/qwaylandinputdevice_p.h

@@ -188,7 +188,7 @@ private:
     uint32_t mSerial = 0;
 
     void seat_capabilities(uint32_t caps) override;
-    void handleTouchPoint(int id, double x, double y, Qt::TouchPointState state);
+    void handleTouchPoint(int id, Qt::TouchPointState state, const QPointF &surfacePosition = QPoint());
 
     QTouchDevice *mTouchDevice = nullptr;
 
@@ -389,8 +389,7 @@ public:
 
     QWaylandInputDevice *mParent = nullptr;
     QPointer<QWaylandWindow> mFocus;
-    QList<QWindowSystemInterface::TouchPoint> mTouchPoints;
-    QList<QWindowSystemInterface::TouchPoint> mPrevTouchPoints;
+    QList<QWindowSystemInterface::TouchPoint> mPendingTouchPoints;
 };
 
 class QWaylandPointerEvent

src/plugins/platforms/wayland/qwaylandwindow.cpp

@@ -201,10 +201,13 @@ void QWaylandWindow::initWindow()
 void QWaylandWindow::initializeWlSurface()
 {
     Q_ASSERT(!mSurface);
-    mSurface.reset(new QWaylandSurface(mDisplay));
-    connect(mSurface.data(), &QWaylandSurface::screensChanged,
-            this, &QWaylandWindow::handleScreensChanged);
-    mSurface->m_window = this;
+    {
+        QWriteLocker lock(&mSurfaceLock);
+        mSurface.reset(new QWaylandSurface(mDisplay));
+        connect(mSurface.data(), &QWaylandSurface::screensChanged,
+                this, &QWaylandWindow::handleScreensChanged);
+        mSurface->m_window = this;
+    }
     emit wlSurfaceCreated();
 }
 
@@ -242,6 +245,7 @@ void QWaylandWindow::reset(bool sendDestroyEvent)
     mSubSurfaceWindow = nullptr;
     if (mSurface) {
         emit wlSurfaceDestroyed();
+        QWriteLocker lock(&mSurfaceLock);
         mSurface.reset();
     }
 
@@ -617,10 +621,11 @@ QMutex QWaylandWindow::mFrameSyncMutex;
 
 bool QWaylandWindow::waitForFrameSync(int timeout)
 {
-    QMutexLocker locker(&mFrameSyncMutex);
     if (!mWaitingForFrameCallback)
         return true;
 
+    QMutexLocker locker(&mFrameSyncMutex);
+
     wl_proxy_set_queue(reinterpret_cast<wl_proxy *>(mFrameCallback), mFrameQueue);
     mDisplay->dispatchQueueWhile(mFrameQueue, [&]() { return mWaitingForFrameCallback; }, timeout);
 
@@ -1135,6 +1140,9 @@ void QWaylandWindow::requestUpdate()
 void QWaylandWindow::handleUpdate()
 {
     // TODO: Should sync subsurfaces avoid requesting frame callbacks?
+    QReadLocker lock(&mSurfaceLock);
+    if (!mSurface)
+        return;
 
     if (mFrameCallback) {
         wl_callback_destroy(mFrameCallback);

src/plugins/platforms/wayland/qwaylandwindow_p.h

@@ -53,6 +53,8 @@
 
 #include <QtCore/QWaitCondition>
 #include <QtCore/QMutex>
+#include <QtCore/QReadWriteLock>
+
 #include <QtGui/QIcon>
 #include <QtCore/QVariant>
 #include <QtCore/QLoggingCategory>
@@ -274,6 +276,8 @@ private:
     static QMutex mFrameSyncMutex;
     static QWaylandWindow *mMouseGrab;
 
+    QReadWriteLock mSurfaceLock;
+
     friend class QWaylandSubSurface;
 };
 

tests/auto/wayland/client.pro

@@ -11,6 +11,7 @@ SUBDIRS += \
     seatv5 \
     surface \
     wl_connect \
+    xdgdecorationv1 \
     xdgoutput \
     xdgshell \
     xdgshellv6

tests/auto/wayland/datadevicev1/tst_datadevicev1.cpp

@@ -30,9 +30,8 @@
 
 #include <QtGui/QRasterWindow>
 #include <QtGui/QOpenGLWindow>
-
-//TODO: move?
 #include <QtGui/QClipboard>
+#include <QtGui/QDrag>
 
 using namespace MockCompositor;
 
@@ -60,6 +59,7 @@ private slots:
     void pasteUtf8();
     void destroysPreviousSelection();
     void destroysSelectionWithSurface();
+    void dragWithoutFocus();
 };
 
 void tst_datadevicev1::initTestCase()
@@ -215,5 +215,22 @@ void tst_datadevicev1::destroysSelectionWithSurface()
     QCOMPOSITOR_TRY_COMPARE(dataDevice()->m_sentSelectionOffers.size(), 0);
 }
 
+// The application should not crash if it attempts to start a drag operation
+// when it doesn't have input focus (QTBUG-76368)
+void tst_datadevicev1::dragWithoutFocus()
+{
+    QRasterWindow window;
+    window.resize(64, 64);
+    window.show();
+    QCOMPOSITOR_TRY_VERIFY(xdgSurface() && xdgSurface()->m_committedConfigureSerial);
+
+    auto *mimeData = new QMimeData;
+    const QByteArray data("testData");
+    mimeData->setData("text/plain", data);
+    QDrag drag(&window);
+    drag.setMimeData(mimeData);
+    drag.exec();
+}
+
 QCOMPOSITOR_TEST_MAIN(tst_datadevicev1)
 #include "tst_datadevicev1.moc"

tests/auto/wayland/seatv4/tst_seatv4.cpp

@@ -72,6 +72,7 @@ private slots:
     void usesEnterSerial();
     void focusDestruction();
     void mousePress();
+    void mousePressFloat();
     void simpleAxis_data();
     void simpleAxis();
     void invalidPointerEvents();
@@ -208,6 +209,30 @@ void tst_seatv4::mousePress()
     QTRY_VERIFY(window.m_pressed);
 }
 
+void tst_seatv4::mousePressFloat()
+{
+    class Window : public QRasterWindow {
+    public:
+        void mousePressEvent(QMouseEvent *e) override { m_position = e->localPos(); }
+        QPointF m_position;
+    };
+
+    Window window;
+    window.resize(64, 64);
+    window.show();
+    QCOMPOSITOR_TRY_VERIFY(xdgSurface() && xdgSurface()->m_committedConfigureSerial);
+
+    exec([&] {
+        auto *surface = xdgSurface()->m_surface;
+        pointer()->sendEnter(surface, {32.75, 32.25});
+        pointer()->sendButton(client(), BTN_LEFT, 1);
+        pointer()->sendButton(client(), BTN_LEFT, 0);
+    });
+    QMargins m = window.frameMargins();
+    QPointF pressedPosition(32.75 -m.left(), 32.25 - m.top());
+    QTRY_COMPARE(window.m_position, pressedPosition);
+}
+
 void tst_seatv4::simpleAxis_data()
 {
     QTest::addColumn<uint>("axis");

tests/auto/wayland/seatv5/tst_seatv5.cpp

@@ -68,6 +68,7 @@ private slots:
     // Touch tests
     void createsTouch();
     void singleTap();
+    void singleTapFloat();
 };
 
 void tst_seatv5::bindsToSeat()
@@ -431,5 +432,36 @@ void tst_seatv5::singleTap()
     }
 }
 
+void tst_seatv5::singleTapFloat()
+{
+    TouchWindow window;
+    QCOMPOSITOR_TRY_VERIFY(xdgSurface() && xdgSurface()->m_committedConfigureSerial);
+
+    exec([=] {
+        auto *t = touch();
+        auto *c = client();
+        t->sendDown(xdgToplevel()->surface(), {32.75, 32.25}, 1);
+        t->sendFrame(c);
+        t->sendUp(c, 1);
+        t->sendFrame(c);
+    });
+
+    QTRY_VERIFY(!window.m_events.empty());
+    {
+        auto e = window.m_events.takeFirst();
+        QCOMPARE(e.type, QEvent::TouchBegin);
+        QCOMPARE(e.touchPointStates, Qt::TouchPointState::TouchPointPressed);
+        QCOMPARE(e.touchPoints.length(), 1);
+        QCOMPARE(e.touchPoints.first().pos(), QPointF(32.75-window.frameMargins().left(), 32.25-window.frameMargins().top()));
+    }
+    {
+        auto e = window.m_events.takeFirst();
+        QCOMPARE(e.type, QEvent::TouchEnd);
+        QCOMPARE(e.touchPointStates, Qt::TouchPointState::TouchPointReleased);
+        QCOMPARE(e.touchPoints.length(), 1);
+        QCOMPARE(e.touchPoints.first().pos(), QPointF(32.75-window.frameMargins().left(), 32.25-window.frameMargins().top()));
+    }
+}
+
 QCOMPOSITOR_TEST_MAIN(tst_seatv5)
 #include "tst_seatv5.moc"

tests/auto/wayland/xdgdecorationv1/tst_xdgdecorationv1.cpp

@@ -0,0 +1,186 @@
+/****************************************************************************
+**
+** Copyright (C) 2018 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "mockcompositor.h"
+
+#include <qwayland-server-xdg-decoration-unstable-v1.h>
+
+#include <QtGui/QRasterWindow>
+#include <QtGui/QOpenGLWindow>
+#include <QtGui/QClipboard>
+#include <QtCore/private/qcore_unix_p.h>
+
+#include <fcntl.h>
+
+using namespace MockCompositor;
+
+constexpr int xdgDecorationVersion = 1; // protocol VERSION, not the name suffix (_v1)
+
+class XdgDecorationManagerV1;
+class XdgToplevelDecorationV1 : public QObject, public QtWaylandServer::zxdg_toplevel_decoration_v1
+{
+    Q_OBJECT
+public:
+    explicit XdgToplevelDecorationV1(XdgDecorationManagerV1 *manager, XdgToplevel *toplevel, int id, int version)
+        : zxdg_toplevel_decoration_v1(toplevel->resource()->client(), id, version)
+        , m_manager(manager)
+        , m_toplevel(toplevel)
+    {
+    }
+    void sendConfigure(mode mode)
+    {
+        if (!m_configureSent) {
+            // Attaching buffers before the configure is a protocol error
+            QVERIFY(!m_toplevel->surface()->m_pending.buffer);
+            QVERIFY(!m_toplevel->surface()->m_committed.buffer);
+        }
+        send_configure(mode);
+        m_configureSent = true;
+    }
+    void zxdg_toplevel_decoration_v1_destroy(Resource *resource) override
+    {
+        wl_resource_destroy(resource->handle);
+    }
+    void zxdg_toplevel_decoration_v1_destroy_resource(Resource *resource) override;
+    void zxdg_toplevel_decoration_v1_set_mode(Resource *resource, uint32_t mode) override
+    {
+        Q_UNUSED(resource);
+        m_unsetModeRequested = false;
+        m_requestedMode = XdgToplevelDecorationV1::mode(mode);
+    }
+    void zxdg_toplevel_decoration_v1_unset_mode(Resource *resource) override
+    {
+        Q_UNUSED(resource);
+        m_unsetModeRequested = true;
+        m_requestedMode = mode(0);
+    }
+    XdgDecorationManagerV1 *m_manager = nullptr;
+    XdgToplevel *m_toplevel = nullptr;
+    mode m_requestedMode = mode(0);
+    bool m_unsetModeRequested = false;
+    bool m_configureSent = false;
+};
+
+class XdgDecorationManagerV1 : public Global, public QtWaylandServer::zxdg_decoration_manager_v1
+{
+    Q_OBJECT
+public:
+    explicit XdgDecorationManagerV1(CoreCompositor *compositor, int version = 1)
+        : QtWaylandServer::zxdg_decoration_manager_v1(compositor->m_display, version)
+        , m_version(version)
+    {}
+    bool isClean() override { return m_decorations.empty(); }
+    XdgToplevelDecorationV1 *decorationFor(XdgToplevel *toplevel)
+    {
+        return m_decorations.value(toplevel, nullptr);
+    }
+
+    int m_version = 1; // TODO: Remove on libwayland upgrade
+    QMap<XdgToplevel *, XdgToplevelDecorationV1 *> m_decorations;
+
+protected:
+    void zxdg_decoration_manager_v1_destroy(Resource *resource) override
+    {
+        //TODO: Should the decorations be destroyed at this point?
+        wl_resource_destroy(resource->handle);
+    }
+
+    void zxdg_decoration_manager_v1_get_toplevel_decoration(Resource *resource, uint32_t id, ::wl_resource *toplevelResource) override
+    {
+        auto *toplevel = fromResource<XdgToplevel>(toplevelResource);
+        QVERIFY(toplevel);
+        QVERIFY(!decorationFor(toplevel));
+
+        // Attaching buffers before the configure is a protocol error
+        QVERIFY(!toplevel->surface()->m_pending.buffer);
+        QVERIFY(!toplevel->surface()->m_committed.buffer);
+
+        m_decorations[toplevel] = new XdgToplevelDecorationV1(this, toplevel, id, resource->version());
+    }
+};
+
+void XdgToplevelDecorationV1::zxdg_toplevel_decoration_v1_destroy_resource(QtWaylandServer::zxdg_toplevel_decoration_v1::Resource *resource)
+{
+    Q_UNUSED(resource);
+    int removed = m_manager->m_decorations.remove(m_toplevel);
+    Q_ASSERT(removed == 1);
+    delete this;
+}
+
+class XdgDecorationCompositor : public DefaultCompositor {
+public:
+    explicit XdgDecorationCompositor()
+    {
+        exec([this] {
+            m_config.autoConfigure = true;
+            add<XdgDecorationManagerV1>(xdgDecorationVersion);
+        });
+    }
+    XdgToplevelDecorationV1 *toplevelDecoration(int i = 0) {
+        return get<XdgDecorationManagerV1>()->decorationFor(xdgToplevel(i));
+    }
+};
+
+class tst_xdgdecorationv1 : public QObject, private XdgDecorationCompositor
+{
+    Q_OBJECT
+private slots:
+    void initTestCase();
+    void cleanup() { QTRY_VERIFY2(isClean(), qPrintable(dirtyMessage())); }
+    void clientSidePreferredByCompositor();
+};
+
+void tst_xdgdecorationv1::initTestCase()
+{
+    if (qEnvironmentVariableIntValue("QT_WAYLAND_DISABLE_WINDOWDECORATION"))
+        QSKIP("This test doesn't make sense when QT_WAYLAND_DISABLE_WINDOWDECORATION is set in the environment");
+}
+
+void tst_xdgdecorationv1::clientSidePreferredByCompositor()
+{
+    QRasterWindow window;
+    window.show();
+    QCOMPOSITOR_TRY_COMPARE(get<XdgDecorationManagerV1>()->resourceMap().size(), 1);
+    QCOMPOSITOR_TRY_COMPARE(get<XdgDecorationManagerV1>()->resourceMap().first()->version(), xdgDecorationVersion);
+    QCOMPOSITOR_TRY_VERIFY(toplevelDecoration()); // The client creates a toplevel object
+
+    // Check that we don't assume decorations before the server has configured them
+    QVERIFY(window.frameMargins().isNull());
+
+    QCOMPOSITOR_TRY_VERIFY(xdgToplevel());
+    QCOMPOSITOR_TRY_VERIFY(toplevelDecoration()->m_unsetModeRequested);
+    QVERIFY(window.frameMargins().isNull()); // We're still waiting for a configure
+    exec([=] {
+        toplevelDecoration()->sendConfigure(XdgToplevelDecorationV1::mode_client_side);
+        xdgToplevel()->sendCompleteConfigure();
+    });
+    QTRY_VERIFY(!window.frameMargins().isNull());
+}
+
+QCOMPOSITOR_TEST_MAIN(tst_xdgdecorationv1)
+#include "tst_xdgdecorationv1.moc"

tests/auto/wayland/xdgdecorationv1/xdgdecorationv1.pro

@@ -0,0 +1,7 @@
+include (../shared/shared.pri)
+
+WAYLANDSERVERSOURCES += \
+    $$PWD/../../../../src/3rdparty/protocol/xdg-decoration-unstable-v1.xml
+
+TARGET = tst_xdgdecorationv1
+SOURCES += tst_xdgdecorationv1.cpp