Animated NSTableView Scrolling

gistfile1.m

// Thanks to CuriousKea for getting this started!
// http://stackoverflow.com/a/8480325/239380

- (void)scrollRowToVisible:(NSInteger)rowIndex animate:(BOOL)animate{
    if(animate){
        NSRect rowRect = [self rectOfRow:rowIndex];
        NSPoint scrollOrigin = rowRect.origin;
        NSClipView *clipView = (NSClipView *)[self superview];
        scrollOrigin.y += MAX(0, round((NSHeight(rowRect)-NSHeight(clipView.frame))*0.5f));
        NSScrollView *scrollView = (NSScrollView *)[clipView superview];
        if([scrollView respondsToSelector:@selector(flashScrollers)]){
            [scrollView flashScrollers];
        }
        [[clipView animator] setBoundsOrigin:scrollOrigin];
    }else{
        [self scrollRowToVisible:rowIndex];
    }
}

Swift 5.3 version

extension NSTableView {
    func scrollRowToVisible(row: Int, animated: Bool) {
        if animated {
            let rowRect = self.rect(ofRow: row)
            var scrollOrigin = rowRect.origin
            let clipView = self.superview as? NSClipView
            
            let tableHalfHeight = NSHeight(clipView!.frame)*0.5
            let rowRectHalfHeight = NSHeight(rowRect)*0.5
            
            scrollOrigin.y = (scrollOrigin.y - tableHalfHeight) + rowRectHalfHeight
            let scrollView = clipView!.superview as? NSScrollView
            
            if scrollView!.responds(to: #selector(NSScrollView.flashScrollers)) {
                scrollView!.flashScrollers()
            }
            
            clipView!.animator().setBoundsOrigin(scrollOrigin)
        } else {
            self.scrollRowToVisible(row)
        }
    }
}