146000 2015-06-15 18:36:45 -0700 [iOS WK2] position:fixed elements sometimes truncated on scroll view bouncing 2015-06-15 19:12:01 -0700 1 1 1 Unclassified WebKit New Bugs 528+ (Nightly build) Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 simon.fraser simon.fraser benjamin simon.fraser oldest_to_newest 1102117 0 simon.fraser 2015-06-15 18:36:45 -0700 [iOS WK2] position:fixed elements sometimes truncated on scroll view bouncing 1102118 1 254917 simon.fraser 2015-06-15 18:41:15 -0700 Created attachment 254917 Patch 1102120 2 254918 simon.fraser 2015-06-15 18:41:59 -0700 Created attachment 254918 Patch 1102121 3 simon.fraser 2015-06-15 18:42:23 -0700 rdar://problem/19448439 1102124 4 254918 benjamin 2015-06-15 18:48:35 -0700 Comment on attachment 254918 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=254918&action=review > Source/WebKit2/UIProcess/API/Cocoa/WKWebView.mm:1522 > +- (BOOL)_scrollViewIsRubberBanding Can we do ? CGPoint contentOffset = [_scrollView contentOffset]; CGPoint validContentOffset = contentOffsetBoundedInValidRange(_scrollView.get(), contentOffset) if (notEqualThingy(contentOffset, validContentOffset) return true; > Source/WebKit2/UIProcess/API/Cocoa/WKWebView.mm:1563 > + BOOL isStableState = !(_isChangingObscuredInsetsInteractively || [_scrollView isDragging] || [_scrollView isDecelerating] || [_scrollView isZooming] || [_scrollView isZoomBouncing] || [_scrollView _isAnimatingZoom] || [_scrollView _isScrollingToTop] || [self _scrollViewIsRubberBanding]); Of course, [isDragging] and [isDecelerating] is not enough, that totally make sense :( 1102128 5 simon.fraser 2015-06-15 19:12:01 -0700 https://trac.webkit.org/r185576 254917 2015-06-15 18:41:15 -0700 2015-06-15 18:41:58 -0700 Patch bug-146000-20150615184041.patch text/plain 4409 simon.fraser U3VidmVyc2lvbiBSZXZpc2lvbjogMTg1NTU0CmRpZmYgLS1naXQgYS9Tb3VyY2UvV2ViS2l0Mi9D 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