Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 47d278fb1ae4e8f0ece81ba4d0f5152b42bc24fa
https://github.com/WebKit/WebKit/commit/47d278fb1ae4e8f0ece81ba4d0f5152b42bc24fa
Author: Abrar Rahman Protyasha <[email protected]>
Date: 2026-10-08 (Thu, 08 Oct 2026)
Changed paths:
M Source/WebCore/platform/ScrollingEffectsController.h
M Source/WebCore/platform/mac/ScrollingEffectsController.mm
M Source/WebKit/UIProcess/mac/AppKitGestures/WKAppKitGestureController.mm
Log Message:
-----------
[AppKit Gestures] Cannot magnify while scroll is decelerating
https://bugs.webkit.org/show_bug.cgi?id=326608
rdar://189352001
Reviewed by Richard Robinson.
We only let a few gestures begin when catching a decelerating scroll. In
this patch, we add all of our manipulation gestures (and not just pan)
to this set.
However, this exacerbates a pre-existing problem: the page can jump at
the end of a transient zoom commit. A committed zoom holds the scroll
position until the web process catches up, so anything that scrolls
meanwhile appears all at once. Stop two things from scrolling then:
- Momentum from a pan that ends along with a magnification or rotation.
- The gesture's velocity on an unstretched axis when the rubber band
relaxes a stretch.
* Source/WebKit/UIProcess/mac/AppKitGestures/WKAppKitGestureController.mm:
(-[WKAppKitGestureController
_shouldRecognizeSimultaneouslyWithMouseTrackingGesture:]):
(-[WKAppKitGestureController gestureRecognizerShouldBegin:]):
(-[WKAppKitGestureController _isOurManipulationGestureRecognizer:]):
(-[WKAppKitGestureController _isSomeManipulationGestureRecognizer:]):
Canonical link: https://commits.webkit.org/323094@main
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