sd/source/ui/slidesorter/cache/SlsCacheConfiguration.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 #include "SlsCacheConfiguration.hxx"
  21 #include <osl/mutex.hxx>
  22 #include <rtl/instance.hxx>
  23 #include <vcl/svapp.hxx>
  24
  25 #include <comphelper/processfactory.hxx>
  26 #include <com/sun/star/lang/XMultiServiceFactory.hpp>
  27 #include <com/sun/star/container/XHierarchicalNameAccess.hpp>
  28 #include <com/sun/star/configuration/theDefaultProvider.hpp>
  29 #include <com/sun/star/beans/PropertyValue.hpp>
  30
  31 using namespace ::com::sun::star;
  32 using namespace ::com::sun::star::uno;
  33
  34 namespace sd { namespace slidesorter { namespace cache {
  35
  36 namespace
  37 {
  38     typedef ::boost::shared_ptr<CacheConfiguration> CacheConfigSharedPtr;
  39     class theInstance :
  40         public rtl::Static<CacheConfigSharedPtr, theInstance> {};
  41 }
  42
  43 ::boost::weak_ptr<CacheConfiguration> CacheConfiguration::mpWeakInstance;
  44 Timer CacheConfiguration::maReleaseTimer;
  45
  46 ::boost::shared_ptr<CacheConfiguration> CacheConfiguration::Instance()
  47 {
  48     SolarMutexGuard aSolarGuard;
  49     CacheConfigSharedPtr &rInstancePtr = theInstance::get();
  50     if (rInstancePtr.get() == NULL)
  51     {
  52         // Maybe somebody else kept a previously created instance alive.
  53         if ( ! mpWeakInstance.expired())
  54             rInstancePtr = ::boost::shared_ptr<CacheConfiguration>(mpWeakInstance);
  55         if (rInstancePtr.get() == NULL)
  56         {
  57             // We have to create a new instance.
  58             rInstancePtr.reset(new CacheConfiguration());
  59             mpWeakInstance = rInstancePtr;
  60             // Prepare to release this instance in the near future.
  61             maReleaseTimer.SetTimeoutHdl(
  62                 LINK(rInstancePtr.get(),CacheConfiguration,TimerCallback));
  63             maReleaseTimer.SetTimeout(5000 /* 5s */);
  64             maReleaseTimer.Start();
  65         }
  66     }
  67     return rInstancePtr;
  68 }
  69
  70 CacheConfiguration::CacheConfiguration()
  71 {
  72     // Get the cache size from configuration.
  73     const OUString sPathToImpressConfigurationRoot("/org.openoffice.Office.Impress/");
  74     const OUString sPathToNode("MultiPaneGUI/SlideSorter/PreviewCache");
  75
  76     try
  77     {
  78         // Obtain access to the configuration.
  79         Reference<lang::XMultiServiceFactory> xProvider =
  80             configuration::theDefaultProvider::get( ::comphelper::getProcessComponentContext() );
  81
  82         // Obtain access to Impress configuration.
  83         Sequence<Any> aCreationArguments(3);
  84         aCreationArguments[0] = makeAny(beans::PropertyValue(
  85             "nodepath",
  86             0,
  87             makeAny(sPathToImpressConfigurationRoot),
  88             beans::PropertyState_DIRECT_VALUE));
  89         aCreationArguments[1] = makeAny(beans::PropertyValue(
  90             "depth",
  91             0,
  92             makeAny((sal_Int32)-1),
  93             beans::PropertyState_DIRECT_VALUE));
  94         aCreationArguments[2] = makeAny(beans::PropertyValue(
  95             "lazywrite",
  96             0,
  97             makeAny(true),
  98             beans::PropertyState_DIRECT_VALUE));
  99
 100         Reference<XInterface> xRoot (xProvider->createInstanceWithArguments(
 101             "com.sun.star.configuration.ConfigurationAccess",
 102             aCreationArguments));
 103         if ( ! xRoot.is())
 104             return;
 105         Reference<container::XHierarchicalNameAccess> xHierarchy (xRoot, UNO_QUERY);
 106         if ( ! xHierarchy.is())
 107             return;
 108
 109         // Get the node for the slide sorter preview cache.
 110         mxCacheNode = Reference<container::XNameAccess>(
 111             xHierarchy->getByHierarchicalName(sPathToNode),
 112             UNO_QUERY);
 113     }
 114     catch (RuntimeException &)
 115     {
 116     }
 117     catch (Exception &)
 118     {
 119     }
 120 }
 121
 122 Any CacheConfiguration::GetValue (const OUString& rName)
 123 {
 124     Any aResult;
 125
 126     if (mxCacheNode != NULL)
 127     {
 128         try
 129         {
 130             aResult = mxCacheNode->getByName(rName);
 131         }
 132         catch (Exception &)
 133         {
 134         }
 135     }
 136
 137     return aResult;
 138 }
 139
 140 IMPL_STATIC_LINK_NOARG_TYPED(CacheConfiguration, TimerCallback, Timer *, void)
 141 {
 142     CacheConfigSharedPtr &rInstancePtr = theInstance::get();
 143     // Release our reference to the instance.
 144     rInstancePtr.reset();
 145 }
 146
 147 } } } // end of namespace ::sd::slidesorter::cache
 148
 149 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */