Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 0a7fbd0e87756615ec98e0f674be8886bbac17ab
https://github.com/WebKit/WebKit/commit/0a7fbd0e87756615ec98e0f674be8886bbac17ab
Author: Wenson Hsieh <wenson_hs...@apple.com>
Date: 2025-07-20 (Sun, 20 Jul 2025)
Changed paths:
M Source/WebKit/Platform/spi/ios/UIKitSPI.h
M Source/WebKit/UIProcess/API/ios/WKWebViewIOS.mm
M Source/WebKit/UIProcess/ios/UIKitUtilities.h
Log Message:
-----------
[Liquid Glass] [iOS] Scroll pockets disappear after ending a navigation swipe
https://bugs.webkit.org/show_bug.cgi?id=296254
rdar://156274449
Reviewed by Abrar Rahman Protyasha.
Work around another case where scroll pockets disappear on iOS, when swiping
backwards/forwards.
After recent changes in UIKit, pocketed element bounds are cached per scroll
pocket, but these
bounds are (sometimes) not invalidated when scroll views change
positions/transforms or are
reparented in the view hierarchy. One of these cases is when swiping
back/forwards, where
`WKScrollView` is temporarily parented under the `LiveSwipeViewClipping` layer
before being moved
back under the `WKWebView` after the swipe is complete. The end result is that
scroll pockets are
*removed* from the view hierarchy, since UIKit determines they aren't
necessary, due to the fact
that the pocketed element rects don't intersect with the scroll view's frame
right after the swipe
finishes, since the scroll view is offscreen.
As a temporary workaround, we forcibly invalidate the scroll pockets' cached
geometries after a
navigation swipe finishes. This change should be reverted once the fix for the
underlying issue
lands, in rdar://156271879.
* Source/WebKit/Platform/spi/ios/UIKitSPI.h:
* Source/WebKit/UIProcess/API/ios/WKWebViewIOS.mm:
(-[WKWebView _navigationGestureDidEnd]):
(-[WKWebView _forceScrollPocketsToRecomputeElementRegions]):
* Source/WebKit/UIProcess/ios/UIKitUtilities.h:
Canonical link: https://commits.webkit.org/297668@main
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