Client: Expose XdgShell native resources

Many new specifications now rely on passing xdg_surface/xdg_toplevel as
arguments to other protocols.

wl_shell is currently exposed through native resources but xdg-shell
related classes were not.

Fixes: QTBUG-81479
Change-Id: I2023f39ad6813ff58e8a86d739f307d791794b16
Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>

5 files changed, 44 insertions, 0 deletions

diff --git a/src/plugins/shellintegration/xdg-shell/qwaylandxdgshell.cpp b/src/plugins/shellintegration/xdg-shell/qwaylandxdgshell.cpp
index b6d23ac10..43360ede3 100644
--- a/src/plugins/shellintegration/xdg-shell/qwaylandxdgshell.cpp
+++ b/src/plugins/shellintegration/xdg-shell/qwaylandxdgshell.cpp
@@ -378,6 +378,18 @@ void QWaylandXdgSurface::setSizeHints()
     }
 }
 
+void *QWaylandXdgSurface::nativeResource(const QByteArray &resource)
+{
+    QByteArray lowerCaseResource = resource.toLower();
+    if (lowerCaseResource == "xdg_surface")
+        return object();
+    else if (lowerCaseResource == "xdg_toplevel" && m_toplevel)
+        return m_toplevel->object();
+    else if (lowerCaseResource == "xdg_popup" && m_popup)
+        return m_popup->object();
+    return nullptr;
+}
+
 void QWaylandXdgSurface::requestWindowStates(Qt::WindowStates states)
 {
     if (m_toplevel)
diff --git a/src/plugins/shellintegration/xdg-shell/qwaylandxdgshell_p.h b/src/plugins/shellintegration/xdg-shell/qwaylandxdgshell_p.h
index 0c98be35c..5aeec2eb9 100644
--- a/src/plugins/shellintegration/xdg-shell/qwaylandxdgshell_p.h
+++ b/src/plugins/shellintegration/xdg-shell/qwaylandxdgshell_p.h
@@ -97,6 +97,8 @@ public:
 
     void setSizeHints();
 
+    void *nativeResource(const QByteArray &resource);
+
 protected:
     void requestWindowStates(Qt::WindowStates states) override;
     void xdg_surface_configure(uint32_t serial) override;
diff --git a/src/plugins/shellintegration/xdg-shell/qwaylandxdgshellintegration.cpp b/src/plugins/shellintegration/xdg-shell/qwaylandxdgshellintegration.cpp
index 8769d9716..b259a3010 100644
--- a/src/plugins/shellintegration/xdg-shell/qwaylandxdgshellintegration.cpp
+++ b/src/plugins/shellintegration/xdg-shell/qwaylandxdgshellintegration.cpp
@@ -83,6 +83,16 @@ void QWaylandXdgShellIntegration::handleKeyboardFocusChanged(QWaylandWindow *new
     }
 }
 
+void *QWaylandXdgShellIntegration::nativeResourceForWindow(const QByteArray &resource, QWindow *window)
+{
+    if (auto waylandWindow = static_cast<QWaylandWindow *>(window->handle())) {
+        if (auto xdgSurface = qobject_cast<QWaylandXdgSurface *>(waylandWindow->shellSurface())) {
+            return xdgSurface->nativeResource(resource);
+        }
+    }
+    return nullptr;
+}
+
 }
 
 QT_END_NAMESPACE
diff --git a/src/plugins/shellintegration/xdg-shell/qwaylandxdgshellintegration_p.h b/src/plugins/shellintegration/xdg-shell/qwaylandxdgshellintegration_p.h
index b6caa6c95..ceca0335d 100644
--- a/src/plugins/shellintegration/xdg-shell/qwaylandxdgshellintegration_p.h
+++ b/src/plugins/shellintegration/xdg-shell/qwaylandxdgshellintegration_p.h
@@ -66,6 +66,7 @@ public:
     bool initialize(QWaylandDisplay *display) override;
     QWaylandShellSurface *createShellSurface(QWaylandWindow *window) override;
     void handleKeyboardFocusChanged(QWaylandWindow *newFocus, QWaylandWindow *oldFocus) override;
+    void *nativeResourceForWindow(const QByteArray &resource, QWindow *window) override;
 
 private:
     QScopedPointer<QWaylandXdgShell> m_xdgShell;
diff --git a/tests/auto/client/xdgshell/tst_xdgshell.cpp b/tests/auto/client/xdgshell/tst_xdgshell.cpp
index 3007fb326..891bc0b28 100644
--- a/tests/auto/client/xdgshell/tst_xdgshell.cpp
+++ b/tests/auto/client/xdgshell/tst_xdgshell.cpp
@@ -51,6 +51,7 @@ private slots:
     void minMaxSize();
     void windowGeometry();
     void foreignSurface();
+    void nativeResources();
 };
 
 void tst_xdgshell::showMinimized()
@@ -563,5 +564,23 @@ void tst_xdgshell::foreignSurface()
     wl_surface_destroy(foreignSurface);
 }
 
+void tst_xdgshell::nativeResources()
+{
+    QRasterWindow window;
+    window.resize(400, 320);
+    window.show();
+    QCOMPOSITOR_TRY_VERIFY(xdgToplevel());
+
+    auto *ni = QGuiApplication::platformNativeInterface();
+    auto *xdg_surface_proxy = static_cast<::wl_proxy *>(ni->nativeResourceForWindow("xdg_surface", &window));
+    QCOMPARE(wl_proxy_get_class(xdg_surface_proxy), "xdg_surface");
+
+    auto *xdg_toplevel_proxy = static_cast<::wl_proxy *>(ni->nativeResourceForWindow("xdg_toplevel", &window));
+    QCOMPARE(wl_proxy_get_class(xdg_toplevel_proxy), "xdg_toplevel");
+
+    auto *xdg_popup_proxy = static_cast<::wl_proxy *>(ni->nativeResourceForWindow("xdg_popup", &window));
+    QCOMPARE(xdg_popup_proxy, nullptr);
+}
+
 QCOMPOSITOR_TEST_MAIN(tst_xdgshell)
 #include "tst_xdgshell.moc"