sd/source/ui/tools/IconCache.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   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
  21 #include "tools/IconCache.hxx"
  22
  23 #include "sdresid.hxx"
  24 #include <boost/unordered_map.hpp>
  25 #include <osl/doublecheckedlocking.h>
  26 #include <osl/getglobalmutex.hxx>
  27
  28 namespace sd {
  29
  30 //===== IconCache::Implementation =============================================
  31
  32 class IconCache::Implementation
  33 {
  34 private:
  35     friend class IconCache;
  36
  37     /** This pointer holds a valid reference from first time that
  38         IconCache::Instance() is called to the end of the sd module when the
  39         cache is destroyed from SdGlobalResourceContainer.
  40     */
  41     static IconCache* mpInstance;
  42
  43     typedef ::boost::unordered_map<sal_uInt16,Image> ImageContainer;
  44     ImageContainer maContainer;
  45
  46     Image GetIcon (sal_uInt16 nResourceId);
  47 };
  48
  49 IconCache* IconCache::Implementation::mpInstance = NULL;
  50
  51
  52
  53 Image IconCache::Implementation::GetIcon (sal_uInt16 nResourceId)
  54 {
  55     Image aResult;
  56     ImageContainer::iterator iImage;
  57     iImage = maContainer.find (nResourceId);
  58     if (iImage == maContainer.end())
  59     {
  60         aResult = Image(BitmapEx(SdResId(nResourceId)));
  61         maContainer[nResourceId] = aResult;
  62     }
  63     else
  64         aResult = iImage->second;
  65     return aResult;
  66 }
  67
  68
  69
  70
  71 //===== IconCache =============================================================
  72
  73 //static
  74 IconCache& IconCache::Instance (void)
  75 {
  76     if (Implementation::mpInstance == NULL)
  77     {
  78         ::osl::GetGlobalMutex aMutexFunctor;
  79         ::osl::MutexGuard aGuard (aMutexFunctor());
  80         if (Implementation::mpInstance == NULL)
  81         {
  82             IconCache* pCache = new IconCache ();
  83             SdGlobalResourceContainer::Instance().AddResource (
  84                 ::std::auto_ptr<SdGlobalResource>(pCache));
  85             OSL_DOUBLE_CHECKED_LOCKING_MEMORY_BARRIER();
  86             Implementation::mpInstance = pCache;
  87         }
  88     }
  89     else
  90     {
  91         OSL_DOUBLE_CHECKED_LOCKING_MEMORY_BARRIER();
  92     }
  93
  94     DBG_ASSERT(Implementation::mpInstance!=NULL,
  95         "IconCache::Instance(): instance is NULL");
  96     return *Implementation::mpInstance;
  97 }
  98
  99
 100
 101
 102 Image IconCache::GetIcon (sal_uInt16 nResourceId)
 103 {
 104     return mpImpl->GetIcon (nResourceId);
 105 }
 106
 107
 108
 109
 110 IconCache::IconCache (void)
 111     : mpImpl (new Implementation())
 112 {
 113 }
 114
 115
 116
 117
 118 IconCache::~IconCache (void)
 119 {
 120     // empty
 121 }
 122
 123 } // end of namespace sd
 124
 125 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */