Compositor API: Add xdg-decoration unstable v1 support

And add an example with server-side window decorations.

Task-number: QTBUG-69934
Change-Id: Ic3984b50cf7574cae5135dea51eb4b1c80bb45a7
Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>

1 files changed, 107 insertions, 0 deletions

diff --git a/src/compositor/extensions/qwaylandxdgdecorationv1_p.h b/src/compositor/extensions/qwaylandxdgdecorationv1_p.h
new file mode 100644
index 000000000..c09cbc12e
--- /dev/null
+++ b/src/compositor/extensions/qwaylandxdgdecorationv1_p.h
@@ -0,0 +1,107 @@
+/****************************************************************************
+**
+** Copyright (C) 2018 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the QtWaylandCompositor module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** 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 http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QWAYLANDXDGDECORATIONV1_P_H
+#define QWAYLANDXDGDECORATIONV1_P_H
+
+#include "qwaylandxdgdecorationv1.h"
+
+#include <QtWaylandCompositor/private/qwaylandcompositorextension_p.h>
+#include <QtWaylandCompositor/private/qwayland-server-xdg-decoration-unstable-v1.h>
+
+#include <QtWaylandCompositor/QWaylandXdgToplevel>
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+QT_BEGIN_NAMESPACE
+
+class QWaylandXdgToplevel;
+
+class Q_WAYLAND_COMPOSITOR_EXPORT QWaylandXdgDecorationManagerV1Private
+        : public QWaylandCompositorExtensionPrivate
+        , public QtWaylandServer::zxdg_decoration_manager_v1
+{
+    Q_DECLARE_PUBLIC(QWaylandXdgDecorationManagerV1)
+public:
+    using DecorationMode = QWaylandXdgToplevel::DecorationMode;
+    explicit QWaylandXdgDecorationManagerV1Private() {}
+
+protected:
+    void zxdg_decoration_manager_v1_get_toplevel_decoration(Resource *resource, uint id, ::wl_resource *toplevelResource) override;
+
+private:
+    DecorationMode m_defaultMode = DecorationMode::ClientSideDecoration;
+};
+
+class Q_WAYLAND_COMPOSITOR_EXPORT QWaylandXdgToplevelDecorationV1
+        : public QtWaylandServer::zxdg_toplevel_decoration_v1
+{
+public:
+    using DecorationMode = QWaylandXdgToplevel::DecorationMode;
+    explicit QWaylandXdgToplevelDecorationV1(QWaylandXdgToplevel *toplevel,
+                                             QWaylandXdgDecorationManagerV1 *manager,
+                                             wl_client *client, int id);
+
+    DecorationMode configuredMode() const { return m_configuredMode; }
+    void sendConfigure(DecorationMode mode);
+
+protected:
+    void zxdg_toplevel_decoration_v1_destroy_resource(Resource *resource) override;
+    void zxdg_toplevel_decoration_v1_destroy(Resource *resource) override;
+    void zxdg_toplevel_decoration_v1_set_mode(Resource *resource, uint32_t mode) override;
+    void zxdg_toplevel_decoration_v1_unset_mode(Resource *resource) override;
+
+private:
+    void handleClientPreferredModeChanged();
+
+    QWaylandXdgToplevel *m_toplevel = nullptr;
+    QWaylandXdgDecorationManagerV1 *m_manager = nullptr;
+    DecorationMode m_configuredMode = DecorationMode::DefaultDecorationMode;
+    DecorationMode m_clientPreferredMode = DecorationMode::DefaultDecorationMode;
+};
+
+QT_END_NAMESPACE
+
+#endif // QWAYLANDXDGDECORATIONV1_P_H