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21 
22 
23 
24 #ifndef SD_SLIDESORTER_CACHE_CONFIGURATION_HXX
25 #define SD_SLIDESORTER_CACHE_CONFIGURATION_HXX
26 
27 #include <com/sun/star/uno/Any.hxx>
28 #include <vcl/timer.hxx>
29 #include <com/sun/star/container/XNameAccess.hpp>
30 #include <boost/shared_ptr.hpp>
31 #include <boost/weak_ptr.hpp>
32 
33 namespace sd { namespace slidesorter { namespace cache {
34 
35 /** A very simple and easy-to-use access to configuration entries regarding
36     the slide sorter cache.
37 */
38 class CacheConfiguration
39 {
40 public:
41     /** Return an instance to this class.  The reference is released after 5
42         seconds.  Subsequent calls to this function will create a new
43         instance.
44     */
45     static ::boost::shared_ptr<CacheConfiguration> Instance (void);
46 
47     /** Look up the specified value in
48         MultiPaneGUI/SlideSorter/PreviewCache.   When the specified value
49         does not exist then an empty Any is returned.
50     */
51     ::com::sun::star::uno::Any GetValue (const ::rtl::OUString& rName);
52 
53 private:
54     static ::boost::shared_ptr<CacheConfiguration> mpInstance;
55     /** When a caller holds a reference after we have released ours we use
56         this weak pointer to avoid creating a new instance.
57     */
58     static ::boost::weak_ptr<CacheConfiguration> mpWeakInstance;
59     static Timer maReleaseTimer;
60     ::com::sun::star::uno::Reference<
61         ::com::sun::star::container::XNameAccess> mxCacheNode;
62 
63     CacheConfiguration (void);
64 
65     DECL_LINK(TimerCallback, Timer*);
66 };
67 
68 } } } // end of namespace ::sd::slidesorter::cache
69 
70 #endif
71