Client: let QWaylandClientExtension work before platform integration is assigned

Task-number: QTBUG-102457
Change-Id: Ia47478a4fbf45ba96fd73c6a1a53c2b844aa41b4
Reviewed-by: David Edmundson <davidedmundson@kde.org>
(cherry picked from commit b66d93c6b827ef2d194916c68f1f64fe874d5163)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

3 files changed, 10 insertions, 8 deletions

diff --git a/src/client/global/qwaylandclientextension.cpp b/src/client/global/qwaylandclientextension.cpp
index ca0954f7..b2783088 100644
--- a/src/client/global/qwaylandclientextension.cpp
+++ b/src/client/global/qwaylandclientextension.cpp
@@ -6,10 +6,6 @@
 #include "qwaylandclientextension_p.h"
 #include <QtWaylandClient/private/qwaylanddisplay_p.h>
 #include <QtWaylandClient/private/qwaylandintegration_p.h>
-#include <QtGui/QGuiApplication>
-#include <QtGui/qpa/qplatformnativeinterface.h>
-#include <QtGui/private/qguiapplication_p.h>
-#include <QtCore/QDebug>
 
 QT_BEGIN_NAMESPACE
 
@@ -19,12 +15,9 @@ QWaylandClientExtensionPrivate::QWaylandClientExtensionPrivate()
 {
     // Keep the possibility to use a custom waylandIntegration as a plugin,
     // but also add the possibility to run it as a QML component.
-    waylandIntegration = static_cast<QtWaylandClient::QWaylandIntegration *>(QGuiApplicationPrivate::platformIntegration());
+    waylandIntegration = QtWaylandClient::QWaylandIntegration::instance();
     if (!waylandIntegration)
         waylandIntegration = new QtWaylandClient::QWaylandIntegration();
-
-    if (!waylandIntegration->nativeInterface()->nativeResourceForIntegration("wl_display"))
-        qWarning() << "This application requires a Wayland platform plugin";
 }
 
 void QWaylandClientExtensionPrivate::globalAdded(const RegistryGlobal &global)
diff --git a/src/client/qwaylandintegration.cpp b/src/client/qwaylandintegration.cpp
index 13bacc9b..399cc2fd 100644
--- a/src/client/qwaylandintegration.cpp
+++ b/src/client/qwaylandintegration.cpp
@@ -73,6 +73,8 @@ QT_BEGIN_NAMESPACE
 
 namespace QtWaylandClient {
 
+QWaylandIntegration *QWaylandIntegration::sInstance = nullptr;
+
 QWaylandIntegration::QWaylandIntegration()
 #if defined(Q_OS_MACOS)
     : mFontDb(new QCoreTextFontDatabaseEngineFactory<QCoreTextFontEngine>)
@@ -88,10 +90,13 @@ QWaylandIntegration::QWaylandIntegration()
 
     QWaylandWindow::fixedToplevelPositions =
             !qEnvironmentVariableIsSet("QT_WAYLAND_DISABLE_FIXED_POSITIONS");
+
+    sInstance = this;
 }
 
 QWaylandIntegration::~QWaylandIntegration()
 {
+    sInstance = nullptr;
 }
 
 QPlatformNativeInterface * QWaylandIntegration::nativeInterface() const
diff --git a/src/client/qwaylandintegration_p.h b/src/client/qwaylandintegration_p.h
index 6221e689..28406298 100644
--- a/src/client/qwaylandintegration_p.h
+++ b/src/client/qwaylandintegration_p.h
@@ -41,6 +41,8 @@ public:
     QWaylandIntegration();
     ~QWaylandIntegration() override;
 
+    static QWaylandIntegration *instance() { return sInstance; }
+
     bool hasFailed() { return mFailed; }
 
     bool hasCapability(QPlatformIntegration::Capability cap) const override;
@@ -137,6 +139,8 @@ private:
     bool mServerBufferIntegrationInitialized = false;
     bool mShellIntegrationInitialized = false;
 
+    static QWaylandIntegration *sInstance;
+
     friend class QWaylandDisplay;
 };