service: add sort of servicelist including all required layers

[enigma2.git] / lib / service / iservice.h

diff --git a/lib/service/iservice.h b/lib/service/iservice.h
index 54d7b11f29d494aa76b90ab6bc541dde00f10ce5..d0dc1e2b2cb93bdb9bbfb8f1b85422fdcaf0cd8c 100644 (file)
--- a/lib/service/iservice.h
+++ b/lib/service/iservice.h
@@ -250,10 +250,29 @@ public:
        
                /* new, shiny interface: streaming. */
        virtual SWIG_VOID(RESULT) getNext(eServiceReference &SWIG_OUTPUT)=0;
+       
+               /* use this for sorting. output is not sorted because of either
+                - performance reasons: the whole list must be buffered or
+                - the interface would be restricted to a list. streaming
+                  (as well as a future "active" extension) won't be possible.
+               */
+       virtual int compareLessEqual(const eServiceReference &, const eServiceReference &)=0;
 };
 
 TEMPLATE_TYPEDEF(ePtr<iListableService>, iListableServicePtr);
 
+       /* a helper class which can be used as argument to stl's sort(). */
+class iListableServiceCompare
+{
+       ePtr<iListableService> m_list;
+public:
+       iListableServiceCompare(iListableService *list): m_list(list) { }
+       bool operator()(const eServiceReference &a, const eServiceReference &b)
+       {
+               return m_list->compareLessEqual(a, b);
+       }
+};
+
 class iServiceOfflineOperations: public iObject
 {
 public: