gistfile1

#ifdef OMNI_ASSERTIONS_ON


static CGRect (*_original_convertRectFromView)(UIView *self, SEL _cmd, CGRect rect, UIView *view) = NULL;
static CGRect (*_original_convertRectToView)(UIView *self, SEL _cmd, CGRect rect, UIView *view) = NULL;
static CGPoint (*_original_convertPointFromView)(UIView *self, SEL _cmd, CGPoint point, UIView *view) = NULL;
static CGPoint (*_original_convertPointToView)(UIView *self, SEL _cmd, CGPoint point, UIView *view) = NULL;

static UIView *_rootView(UIView *view)
{
    while (YES) {
        UIView *container = view.superview;
        if (!container)
            return view;
        view = container;
    }
}

static BOOL _viewsCompatible(UIView *view1, UIView *view2)
{
    // -window on UIWindow returns nil instead of self. we really only need the two views to have a common ancestor.
    UIView *root1 = _rootView(view1);
    UIView *root2 = _rootView(view2);
    
    OBASSERT(root1 == root2);
    return YES;
}

static CGRect _replacement_convertRectFromView(UIView *self, SEL _cmd, CGRect rect, UIView *view)
{
    OBPRECONDITION(_viewsCompatible(self, view));
    return _original_convertRectFromView(self, _cmd, rect, view);
}

static CGRect _replacement_convertRectToView(UIView *self, SEL _cmd, CGRect rect, UIView *view)
{
    OBPRECONDITION(_viewsCompatible(self, view));
    return _original_convertRectToView(self, _cmd, rect, view);
}

static CGPoint _replacement_convertPointFromView(UIView *self, SEL _cmd, CGPoint point, UIView *view)
{
    OBPRECONDITION(_viewsCompatible(self, view));
    return _original_convertPointFromView(self, _cmd, point, view);
}

static CGPoint _replacement_convertPointToView(UIView *self, SEL _cmd, CGPoint point, UIView *view)
{
    OBPRECONDITION(_viewsCompatible(self, view));
    return _original_convertPointToView(self, _cmd, point, view);
}

static void OUIViewPerformPosing(void) __attribute__((constructor));
static void OUIViewPerformPosing(void)
{
    Class viewClass = NSClassFromString(@"UIView");
    _original_convertRectFromView = (typeof(_original_convertRectFromView))OBReplaceMethodImplementation(viewClass, @selector(convertRect:fromView:), (IMP)_replacement_convertRectFromView);
    _original_convertRectToView = (typeof(_original_convertRectToView))OBReplaceMethodImplementation(viewClass, @selector(convertRect:toView:), (IMP)_replacement_convertRectToView);
    _original_convertPointFromView = (typeof(_original_convertPointFromView))OBReplaceMethodImplementation(viewClass, @selector(convertPoint:fromView:), (IMP)_replacement_convertPointFromView);
    _original_convertPointToView = (typeof(_original_convertPointToView))OBReplaceMethodImplementation(viewClass, @selector(convertPoint:toView:), (IMP)_replacement_convertPointToView);
}

#endif