macosx: Update visibility of buttons depending on current button in carousel views

Signed-off-by: Claudio Cambra <developer@claudiocambra.com>

modules/gui/macosx/library/home-library/VLCLibraryHomeViewBaseCarouselContainerView.m

@@ -143,6 +143,7 @@
 
     [self updateCarouselViewHeight];
     [self updateCarouselOffset];
+    [self updateCarouselButtonVisibility];
 }
 
 - (void)connect
@@ -178,6 +179,14 @@
     self.carouselView.contentOffset = NSMakeSize(horizontalOffset, 0);
 }
 
+- (void)updateCarouselButtonVisibility
+{
+    const NSInteger currentItemIndex = self.carouselView.currentItemIndex;
+    const NSInteger numberOfItems = self.carouselView.numberOfItems;
+    self.leftButton.hidden = currentItemIndex == 0;
+    self.rightButton.hidden = currentItemIndex == numberOfItems - 1;
+}
+
 - (void)resizeWithOldSuperviewSize:(NSSize)oldSize
 {
     [super resizeWithOldSuperviewSize:oldSize];
@@ -263,6 +272,8 @@
     self.selectedItemView.selected = NO;
     carouselItemView.selected = YES;
     self.selectedItemView = carouselItemView;
+
+    [self updateCarouselButtonVisibility];
 }
 
 - (void)carousel:(iCarousel *)carousel didSelectItemAtIndex:(NSInteger)index