xref: /aoo41x/main/sd/source/ui/tools/IconCache.cxx (revision 79aad27f) 
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21 
22 
23 
24 // MARKER(update_precomp.py): autogen include statement, do not remove
25 #include "precompiled_sd.hxx"
26 
27 #include "tools/IconCache.hxx"
28 
29 #include "sdresid.hxx"
30 #include <hash_map>
31 #include <osl/doublecheckedlocking.h>
32 #include <osl/getglobalmutex.hxx>
33 
34 namespace sd {
35 
36 //===== IconCache::Implementation =============================================
37 
38 class IconCache::Implementation
39 {
40 private:
41     friend class IconCache;
42 
43     /** This pointer holds a valid reference from first time that
44         IconCache::Instance() is called to the end of the sd module when the
45         cache is destroyed from SdGlobalResourceContainer.
46     */
47     static IconCache* mpInstance;
48 
49     typedef ::std::hash_map<sal_uInt16,Image> ImageContainer;
50     ImageContainer maContainer;
51 
52     Image GetIcon (sal_uInt16 nResourceId);
53 };
54 
55 IconCache* IconCache::Implementation::mpInstance = NULL;
56 
57 
58 
GetIcon(sal_uInt16 nResourceId)59 Image IconCache::Implementation::GetIcon (sal_uInt16 nResourceId)
60 {
61     Image aResult;
62     ImageContainer::iterator iImage;
63     iImage = maContainer.find (nResourceId);
64     if (iImage == maContainer.end())
65     {
66         aResult = Image(BitmapEx(SdResId(nResourceId)));
67         maContainer[nResourceId] = aResult;
68     }
69     else
70         aResult = iImage->second;
71     return aResult;
72 }
73 
74 
75 
76 
77 //===== IconCache =============================================================
78 
79 //static
Instance(void)80 IconCache& IconCache::Instance (void)
81 {
82     if (Implementation::mpInstance == NULL)
83     {
84         ::osl::GetGlobalMutex aMutexFunctor;
85         ::osl::MutexGuard aGuard (aMutexFunctor());
86         if (Implementation::mpInstance == NULL)
87         {
88             IconCache* pCache = new IconCache ();
89             SdGlobalResourceContainer::Instance().AddResource (
90                 ::std::auto_ptr<SdGlobalResource>(pCache));
91             OSL_DOUBLE_CHECKED_LOCKING_MEMORY_BARRIER();
92             Implementation::mpInstance = pCache;
93         }
94     }
95     else
96     {
97         OSL_DOUBLE_CHECKED_LOCKING_MEMORY_BARRIER();
98     }
99 
100     DBG_ASSERT(Implementation::mpInstance!=NULL,
101         "IconCache::Instance(): instance is NULL");
102     return *Implementation::mpInstance;
103 }
104 
105 
106 
107 
GetIcon(sal_uInt16 nResourceId)108 Image IconCache::GetIcon (sal_uInt16 nResourceId)
109 {
110     return mpImpl->GetIcon (nResourceId);
111 }
112 
113 
114 
115 
IconCache(void)116 IconCache::IconCache (void)
117     : mpImpl (new Implementation())
118 {
119 }
120 
121 
122 
123 
~IconCache(void)124 IconCache::~IconCache (void)
125 {
126     // empty
127 }
128 
129 } // end of namespace sd
130