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diff --git a/vcl/inc/ControlCacheKey.hxx b/vcl/inc/ControlCacheKey.hxx
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+/* -*- 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 .
+ */
+
+#ifndef INCLUDED_VCL_INC_CONTROLCACHEKEY_HXX
+#define INCLUDED_VCL_INC_CONTROLCACHEKEY_HXX
+
+#include <tools/gen.hxx>
+#include <vcl/salnativewidgets.hxx>
+#include <o3tl/hash_combine.hxx>
+
+class ControlCacheKey
+{
+public:
+ ControlType mnType;
+ ControlPart mnPart;
+ ControlState mnState;
+ Size maSize;
+
+ ControlCacheKey(ControlType nType, ControlPart nPart, ControlState nState, const Size& rSize)
+ : mnType(nType)
+ , mnPart(nPart)
+ , mnState(nState)
+ , maSize(rSize)
+ {
+ }
+
+ bool operator==(ControlCacheKey const& aOther) const
+ {
+ return mnType == aOther.mnType && mnPart == aOther.mnPart && mnState == aOther.mnState
+ && maSize.Width() == aOther.maSize.Width()
+ && maSize.Height() == aOther.maSize.Height();
+ }
+
+ bool canCacheControl() const
+ {
+ switch (mnType)
+ {
+ case ControlType::Checkbox:
+ case ControlType::Radiobutton:
+ case ControlType::ListNode:
+ case ControlType::Slider:
+ case ControlType::Progress:
+ // FIXME: these guys have complex state hidden in ImplControlValue
+ // structs which affects rendering, needs to be a and needs to be
+ // part of the key to our cache.
+ case ControlType::Spinbox:
+ case ControlType::SpinButtons:
+ case ControlType::TabItem:
+ return false;
+
+ case ControlType::Menubar:
+ if (mnPart == ControlPart::Entire)
+ return false;
+ break;
+
+ default:
+ break;
+ }
+ return true;
+ }
+};
+
+struct ControlCacheHashFunction
+{
+ std::size_t operator()(ControlCacheKey const& aCache) const
+ {
+ std::size_t seed = 0;
+ o3tl::hash_combine(seed, aCache.mnType);
+ o3tl::hash_combine(seed, aCache.mnPart);
+ o3tl::hash_combine(seed, aCache.mnState);
+ o3tl::hash_combine(seed, aCache.maSize.Width());
+ o3tl::hash_combine(seed, aCache.maSize.Height());
+ return seed;
+ }
+};
+
+#endif // INCLUDED_VCL_INC_CONTROLCACHEKEY_HXX