libsaria: Return nth renderer

Useful for switching to a specific list in the UI

Signed-off-by: Bryan Schumaker <bjschuma@gmail.com>

include/libsaria/playlist.h

@@ -55,6 +55,7 @@ namespace libsaria
 			Playlist(string, unsigned int, PlaylistType);
 			~Playlist();
 			void set_renderer(PlaylistRenderer *);
+			PlaylistRenderer *get_renderer();
 
 			bool is_static();
 			void prepare_for_removal();

include/libsaria/stack.h

@@ -17,6 +17,7 @@ namespace libsaria
 		void prev();
 		void init();
 		Playlist *get_recent_plist();
+		PlaylistRenderer *get_nth_renderer(unsigned int);
 
 	};
 

libsaria/playlist/playlist.cpp

@@ -66,6 +66,11 @@ namespace libsaria
 		renderer = r;
 	}
 
+	PlaylistRenderer *Playlist::get_renderer()
+	{
+		return renderer;
+	}
+
 	void Playlist::reset_iterator()
 	{
 		cur = plist.begin();

libsaria/playlist/stack.cpp

@@ -127,4 +127,18 @@ namespace libsaria
 		return &recent_plist;
 	}
 
+	PlaylistRenderer *stack::get_nth_renderer(unsigned int n)
+	{
+		list<Playlist *>::iterator it = playlist_stack.begin();
+		unsigned int max = (playlist_stack.size() - num_static);
+		println("n: %u, max: %u", n, max);
+
+		if (n >= max)
+			return NULL;
+
+		for (unsigned int i = 0; i < n; i++)
+			it++;
+		return (*it)->get_renderer();
+	}
+
 }; /* Namespace: libsaria */