* Do not add documents to the recent list in _UpdatePlaylistItemFile(), but do

so when the items are added to the playlist. This has the added advantage of
  being able to easily reselect sub-folders (an album for example).
* Enabled navigating folders in the recent item list.
* Added Playlist::IsEmpty() method.
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38897 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/apps/mediaplayer/MainWin.cpp

@@ -1423,19 +1423,13 @@ MainWin::_CreateMenu()
 	fFileMenu->AddItem(item);
 	item->SetTarget(be_app);
 
-#if 0
-	// Plain "Open File" entry
-	fFileMenu->AddItem(new BMenuItem("Open File"B_UTF8_ELLIPSIS,
-		new BMessage(M_FILE_OPEN), 'O'));
-#else
 	// Add recent files to "Open File" entry as sub-menu.
 	BRecentFilesList recentFiles(10, false, NULL, kAppSig);
 	item = new BMenuItem(recentFiles.NewFileListMenu(
-		"Open file"B_UTF8_ELLIPSIS, new BMessage(B_REFS_RECEIVED),
-		NULL, this, 10, false, NULL, 0, kAppSig), new BMessage(M_FILE_OPEN));
+		"Open file"B_UTF8_ELLIPSIS, NULL, NULL, this, 10, true, NULL, kAppSig),
+		new BMessage(M_FILE_OPEN));
 	item->SetShortcut('O', 0);
 	fFileMenu->AddItem(item);
-#endif
 
 	fFileMenu->AddSeparatorItem();
 
@@ -2397,9 +2391,6 @@ MainWin::_UpdatePlaylistItemFile()
 	if (node.InitCheck())
 		return;
 
-	// Add to recent documents
-	be_roster->AddToRecentDocuments(&item->Ref(), kAppSig);
-
 	locker.Unlock();
 
 	// Set some standard attributes of the currently played file.