UIWebView Full-Screen Movie Post-Autorotation-Dismissal Layout Fix

uiwebview_fullscreen_media_playback_with_autororation_workaround.m

@implementation IRWebViewController (irFullscreenMediaPlaybackAutorotationLayoutFix)

- (void) didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation {

//	There is a bug, where launching a media player from the web view, fullscreening it, then rotating the device, and tapping on the media to see the timelime, causes the layout to go all berserk.  This is a hack to combat that.
	
	[super didRotateFromInterfaceOrientation:fromInterfaceOrientation];
	
	if ((!self.view.superview) || (self.parentViewController.modalViewController != self) || (self.modalPresentationStyle != UIModalPresentationFullScreen)) {
	
		return;
	
	}
	
	UIInterfaceOrientation currentOrientation = [UIApplication sharedApplication].statusBarOrientation;
	BOOL currentOrientationIsPortrait = UIInterfaceOrientationIsPortrait(currentOrientation);
	
	CGRect windowBounds = self.view.window.bounds;
	
	CGRect finalFrame = IRCGRectAlignToRect(

		(CGRect) {
		
			CGPointZero, 
			
			(CGSize) {
	
				windowBounds.size.width - (currentOrientationIsPortrait ? 0 : 20),
				windowBounds.size.height - (currentOrientationIsPortrait ? 20 : 0)
			
			}
	
		}, 
		
		windowBounds,
		
		(IRAnchor[]) {
	
			[UIInterfaceOrientationPortrait] = irBottom,
			[UIInterfaceOrientationPortraitUpsideDown] = irTop,
			[UIInterfaceOrientationLandscapeLeft] = irRight,
			[UIInterfaceOrientationLandscapeRight] = irLeft
		
		}[currentOrientation],
		
		YES

	);

	if (CGRectEqualToRect(finalFrame, self.view.frame))
	return;

	NSLog(@"Unexpected frame.  Compensating.");


//	Is the topmost view a fullscreen view which is the same size of the current window?
//	If yes, assume that it is the media player.  Recompensate its layout origin so the timeline appears at the right place
//	Do that before changing our own view, to avoid UIView autoresizing from changing its frame
	
	UIView *topmostView = [self.view.subviews objectAtIndex:([self.view.subviews count] - 1)];
	
	CGRect convertedTopmostViewFrame = [self.view convertRect:topmostView.bounds fromView:topmostView];
	CGRect capturedTopmostViewFrame = topmostView.frame;
	
	self.view.frame = finalFrame;
	
	if (!CGRectEqualToRect(convertedTopmostViewFrame, windowBounds))
	return;
	
	topmostView.frame = (CGRect) { (CGPoint) { 0, -20 }, capturedTopmostViewFrame.size };

}

@end