Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 56 insertions, 0 deletions

diff --git a/canvas/source/vcl/windowoutdevholder.hxx b/canvas/source/vcl/windowoutdevholder.hxx
new file mode 100644
index 000000000..87138a8a9
--- /dev/null
+++ b/canvas/source/vcl/windowoutdevholder.hxx
@@ -0,0 +1,56 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/awt/XWindow.hpp>
+#include <vcl/window.hxx>
+
+#include "outdevprovider.hxx"
+
+namespace vclcanvas
+{
+    class WindowOutDevHolder : public OutDevProvider
+    {
+    public:
+        WindowOutDevHolder(const WindowOutDevHolder&) = delete;
+        const WindowOutDevHolder operator=(const WindowOutDevHolder&) = delete;
+
+        explicit WindowOutDevHolder( const css::uno::Reference< css::awt::XWindow>& xWin );
+
+    private:
+        virtual OutputDevice&       getOutDev() override { return *mrOutputWindow.GetOutDev(); }
+        virtual const OutputDevice& getOutDev() const override { return *mrOutputWindow.GetOutDev(); }
+
+        // TODO(Q2): Lifetime issue. Though WindowGraphicDeviceBase
+        // now listens to the window component, I still consider
+        // holding a naked reference unsafe here (especially as we
+        // pass it around via getOutDev). This _only_ works reliably,
+        // if disposing the SpriteCanvas correctly disposes all
+        // entities which hold this pointer.
+        // So: as soon as the protocol inside
+        // vcl/source/window/window.cxx is broken, that disposes the
+        // canvas during window deletion, we're riding a dead horse
+        // here
+        vcl::Window& mrOutputWindow;
+    };
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */