vcl/inc/ControlCacheKey.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
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   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #ifndef INCLUDED_VCL_INC_CONTROLCACHEKEY_HXX
  21 #define INCLUDED_VCL_INC_CONTROLCACHEKEY_HXX
  22
  23 #include <tools/gen.hxx>
  24 #include <vcl/salnativewidgets.hxx>
  25 #include <o3tl/hash_combine.hxx>
  26
  27 class ControlCacheKey
  28 {
  29 public:
  30     ControlType mnType;
  31     ControlPart mnPart;
  32     ControlState mnState;
  33     Size maSize;
  34
  35     ControlCacheKey(ControlType nType, ControlPart nPart, ControlState nState, const Size& rSize)
  36         : mnType(nType)
  37         , mnPart(nPart)
  38         , mnState(nState)
  39         , maSize(rSize)
  40     {
  41     }
  42
  43     bool operator==(ControlCacheKey const& aOther) const
  44     {
  45         return mnType == aOther.mnType && mnPart == aOther.mnPart && mnState == aOther.mnState
  46                && maSize.Width() == aOther.maSize.Width()
  47                && maSize.Height() == aOther.maSize.Height();
  48     }
  49
  50     bool canCacheControl() const
  51     {
  52         switch (mnType)
  53         {
  54             case ControlType::Checkbox:
  55             case ControlType::Radiobutton:
  56             case ControlType::ListNode:
  57             case ControlType::Slider:
  58             case ControlType::LevelBar:
  59             case ControlType::Progress:
  60             // FIXME: these guys have complex state hidden in ImplControlValue
  61             // structs which affects rendering, needs to be a and needs to be
  62             // part of the key to our cache.
  63             case ControlType::Spinbox:
  64             case ControlType::SpinButtons:
  65             case ControlType::TabItem:
  66                 return false;
  67
  68             case ControlType::Menubar:
  69                 if (mnPart == ControlPart::Entire)
  70                     return false;
  71                 break;
  72
  73             default:
  74                 break;
  75         }
  76         return true;
  77     }
  78 };
  79
  80 struct ControlCacheHashFunction
  81 {
  82     std::size_t operator()(ControlCacheKey const& aCache) const
  83     {
  84         std::size_t seed = 0;
  85         o3tl::hash_combine(seed, aCache.mnType);
  86         o3tl::hash_combine(seed, aCache.mnPart);
  87         o3tl::hash_combine(seed, aCache.mnState);
  88         o3tl::hash_combine(seed, aCache.maSize.Width());
  89         o3tl::hash_combine(seed, aCache.maSize.Height());
  90         return seed;
  91     }
  92 };
  93
  94 #endif // INCLUDED_VCL_INC_CONTROLCACHEKEY_HXX