keybinding system rewrite

src/playlist.h

@@ -30,6 +30,8 @@
 class Playlist : public Screen<Window>
 {
 	public:
+		enum Movement { mUp, mDown };
+		
 		Playlist() : NowPlaying(-1), itsTotalLength(0), itsRemainingTime(0), itsScrollBegin(0) { }
 		~Playlist() { }
 		
@@ -57,11 +59,15 @@ class Playlist : public Screen<Window>
 		
 		virtual bool isMergable() { return true; }
 		
+		bool isFiltered();
 		bool isPlaying() { return NowPlaying >= 0 && !Items->Empty(); }
 		const MPD::Song *NowPlayingSong();
 		
+		void MoveSelectedItems(Movement where);
+		
 		void Sort();
-		void AdjustSortOrder(int key);
+		void Reverse();
+		void AdjustSortOrder(Movement where);
 		bool SortingInProgress() { return w == SortDialog; }
 		void FixPositions(size_t = 0);
 		
@@ -82,9 +88,6 @@ class Playlist : public Screen<Window>
 		static bool ReloadTotalLength;
 		static bool ReloadRemaining;
 		
-		static bool BlockNowPlayingUpdate;
-		static bool BlockUpdate;
-		
 	protected:
 		virtual void Init();
 		virtual bool isLockable() { return true; }