Animated NSView redraws + scrolling

NSView-SNRAdditions.m

@implementation NSView (SNRAdditions)
- (void)scrollPointAnimated:(NSPoint)point
{
    NSScrollView *scrollView = [self enclosingScrollView];
    NSClipView *clipView = [scrollView contentView];
    NSPoint constrainedPoint = [clipView constrainScrollPoint:point];
    [NSAnimationContext beginGrouping];
    [[NSAnimationContext currentContext] setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];
    [[clipView animator] setBoundsOrigin:constrainedPoint];
    [NSAnimationContext endGrouping];
    [scrollView reflectScrolledClipView:clipView];
}

- (NSImage*)NSImage
{
    NSSize viewSize = [self bounds].size;
    NSBitmapImageRep *bir = [self bitmapImageRepForCachingDisplayInRect:[self bounds]];
    [bir setSize:viewSize];
    [self cacheDisplayInRect:[self bounds] toBitmapImageRep:bir];
    NSImage* image = [[NSImage alloc] initWithSize:viewSize];
    [image addRepresentation:bir];
    return image;
}

- (void)redrawAnimated
{
    NSImageView *imageView = [[NSImageView alloc] initWithFrame:self.bounds];
    imageView.autoresizingMask = NSViewWidthSizable | NSViewHeightSizable;
    imageView.image = self.NSImage;
    [self addSubview:imageView];
    [self display];
    [NSAnimationContext beginGrouping];
    [[NSAnimationContext currentContext] setCompletionHandler:^(void) {
        [imageView removeFromSuperview];
    }];
    [[imageView animator] setAlphaValue:0.f];
    [NSAnimationContext endGrouping];
}
@end