Fix menu flickering on macOS 10.15

CHANGELOG.md

@@ -7,7 +7,8 @@ and this project does adhere to [Semantic Versioning](https://semver.org/spec/v2
 
 ## [Unreleased]
 ### Fixed
-- Preferences could not be opened on Catalina
+- Preferences could not be opened on macOS 10.15
+- Menu flickering resulting in a hang on macOS 10.15 
 
 ## [1.0.1] - 2019-10-04
 ### Fixed

baRSS/Info.plist

@@ -70,7 +70,7 @@
 		</dict>
 	</array>
 	<key>CFBundleVersion</key>
-	<string>14438</string>
+	<string>14465</string>
 	<key>LSApplicationCategoryType</key>
 	<string>public.app-category.news</string>
 	<key>LSMinimumSystemVersion</key>

baRSS/Status Bar Menu/BarMenu.m

@@ -82,11 +82,6 @@
 	}
 }
 
-/// Get rid of everything that is not needed.
-- (void)menuDidClose:(NSMenu*)menu {
-	[menu cleanup];
-}
-
 /// Generate items for @c FeedGroup menu.
 - (void)setFeedGroups:(NSArray<FeedGroup*>*)sortedList forMenu:(NSMenu*)menu {
 	[menu insertDefaultHeader];
@@ -125,17 +120,21 @@
  Fetch @c Feed from core data and find deepest visible @c NSMenuItem.
  @warning @c item and @c feed will often mismatch.
  */
-- (void)updateFeedMenuItem:(NSManagedObjectID*)oid withBlock:(void(^)(Feed *feed, NSMenuItem *item))block {
+- (BOOL)findDeepest:(NSManagedObjectID*)oid feed:(Feed*__autoreleasing*)feed menuItem:(NSMenuItem*__autoreleasing*)item {
-	Feed *feed = [[StoreCoordinator getMainContext] objectWithID:oid];
+	Feed *f = [[StoreCoordinator getMainContext] objectWithID:oid];
-	if ([feed isKindOfClass:[Feed class]]) {
+	if (![f isKindOfClass:[Feed class]]) return NO;
-		NSMenuItem *item = [self.statusItem.mainMenu deepestItemWithPath:feed.indexPath];
+	NSMenuItem *mi = [self.statusItem.mainMenu deepestItemWithPath:f.indexPath];
-		if (item) block(feed, item);
+	if (!mi) return NO;
-	}
+	*feed = f;
+	*item = mi;
+	return YES;
 }
 
 /// Callback method fired when feed has been updated in the background.
 - (void)articlesUpdated:(NSNotification*)notify {
-	[self updateFeedMenuItem:notify.object withBlock:^(Feed *feed, NSMenuItem *item) {
+	Feed *feed;
+	NSMenuItem *item;
+	if ([self findDeepest:notify.object feed:&feed menuItem:&item]) {
 		// 1. update in-memory unread count
 		UnreadTotal *updated = [UnreadTotal new];
 		updated.total = feed.articles.count;
@@ -160,15 +159,17 @@
 			[item setTitleCount:uct.unread];
 			item = item.parentItem;
 		}
-	}];
+	}
 }
 
 /// Callback method fired when feed icon has changed.
 - (void)feedIconUpdated:(NSNotification*)notify {
-	[self updateFeedMenuItem:notify.object withBlock:^(Feed *feed, NSMenuItem *item) {
+	Feed *feed;
+	NSMenuItem *item;
+	if ([self findDeepest:notify.object feed:&feed menuItem:&item]) {
 		if (item.submenu.isFeedMenu)
 			item.image = [feed iconImage16];
-	}];
+	}
 }
 
 @end

baRSS/Status Bar Menu/NSMenu+Ext.h

@@ -33,7 +33,6 @@
 - (NSMenuItem*)insertFeedGroupItem:(FeedGroup*)fg;
 - (void)insertDefaultHeader;
 // Update menu
-- (void)cleanup;
 - (void)setHeaderHasUnread:(BOOL)hasUnread hasRead:(BOOL)hasRead;
 - (NSMenuItem*)deepestItemWithPath:(nonnull NSString*)path;
 @end

baRSS/Status Bar Menu/NSMenu+Ext.m

@@ -104,12 +104,6 @@ typedef NS_ENUM(NSInteger, MenuItemTag) {
 
 #pragma mark - Update Menu
 
-/// Replace this menu with a clean @c NSMenu. Copy old @c title and @c delegate to new menu. @b Won't work without supermenu!
-- (void)cleanup {
-	NSMenu *m = [[NSMenu alloc] initWithTitle:self.title];
-	m.delegate = self.delegate;
-	self.parentItem.submenu = m;
-}
 
 /// Loop over default header and enable 'OpenAllUnread' and 'TagMarkAllRead' based on unread count.
 - (void)setHeaderHasUnread:(BOOL)hasUnread hasRead:(BOOL)hasRead {