Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: b02b493840f0ce869e34fcd65a027245d392bc91
https://github.com/WebKit/WebKit/commit/b02b493840f0ce869e34fcd65a027245d392bc91
Author: Nikolaos Mouchtaris <[email protected]>
Date: 2023-11-09 (Thu, 09 Nov 2023)
Changed paths:
M
LayoutTests/imported/w3c/web-platform-tests/css/css-scroll-anchoring/ancestor-change-heuristic-expected.txt
M
LayoutTests/imported/w3c/web-platform-tests/css/css-scroll-anchoring/heuristic-with-offset-update-expected.txt
M
LayoutTests/imported/w3c/web-platform-tests/css/css-scroll-anchoring/opt-out-dynamic-expected.txt
M
LayoutTests/imported/w3c/web-platform-tests/css/css-scroll-anchoring/opt-out-dynamic-scroller-expected.txt
M
LayoutTests/imported/w3c/web-platform-tests/css/css-scroll-anchoring/position-change-heuristic-expected.txt
M Source/WebCore/page/LocalFrameView.h
M Source/WebCore/page/scrolling/ScrollAnchoringController.cpp
M Source/WebCore/page/scrolling/ScrollAnchoringController.h
M Source/WebCore/rendering/RenderElement.cpp
M Source/WebCore/rendering/RenderLayerScrollableArea.h
M Source/WebCore/rendering/RenderObject.cpp
M Source/WebCore/rendering/RenderObject.h
M Source/WebCore/rendering/style/RenderStyle.cpp
M Source/WebCore/rendering/style/RenderStyle.h
Log Message:
-----------
[scroll-anchoring] Implement suppression triggers
https://bugs.webkit.org/show_bug.cgi?id=261719
rdar://115704143
Reviewed by Simon Fraser.
Implement suppression of scroll anchoring adjustments according to the spec
(https://www.w3.org/TR/css-scroll-anchoring-1/#suppression-triggers). This
involves suppressing scroll
anchoring adjustments when certain “suppression trigger” operations occur
when an anchor element has
been chosen but before a scroll anchoring adjustment has occurred, that would
cause the next scroll
anchoring adjustment to be incorrect. These suppression triggers are certain
style changes on the anchor
element or any element in the anchor element ancestor chain, up to and
including the scrolling element
that owns the scroll anchroing controller, as well as changing to or from being
absolutely posititioned,
for any element under the owning scrolling element.
*
LayoutTests/imported/w3c/web-platform-tests/css/css-scroll-anchoring/ancestor-change-heuristic-expected.txt:
*
LayoutTests/imported/w3c/web-platform-tests/css/css-scroll-anchoring/heuristic-with-offset-update-expected.txt:
*
LayoutTests/imported/w3c/web-platform-tests/css/css-scroll-anchoring/opt-out-dynamic-expected.txt:
*
LayoutTests/imported/w3c/web-platform-tests/css/css-scroll-anchoring/opt-out-dynamic-scroller-expected.txt:
*
LayoutTests/imported/w3c/web-platform-tests/css/css-scroll-anchoring/position-change-heuristic-expected.txt:
* Source/WebCore/page/LocalFrameView.cpp:
(WebCore::LocalFrameView::scheduleResizeEventIfNeeded):
* Source/WebCore/page/scrolling/ScrollAnchoringController.cpp:
(WebCore::elementIsScrollableArea):
(WebCore::setInScrollAnchoringAncestorChain):
(WebCore::ScrollAnchoringController::invalidateAnchorElement):
(WebCore::ScrollAnchoringController::notifyChildHadSuppressingStyleChange):
(WebCore::scrollAnchoringControllerForElement):
(WebCore::ScrollAnchoringController::notifyParentScrollAnchoringControllerHadSuppressingStyleChange):
(WebCore::ScrollAnchoringController::didFindPriorityCandidate):
(WebCore::ScrollAnchoringController::chooseAnchorElement):
(WebCore::ScrollAnchoringController::adjustScrollPositionForAnchoring):
* Source/WebCore/page/scrolling/ScrollAnchoringController.h:
* Source/WebCore/rendering/RenderElement.cpp:
(WebCore::RenderElement::styleDidChange):
* Source/WebCore/rendering/RenderObject.h:
(WebCore::RenderObject::isInScrollAnchoringAncestorChain const):
(WebCore::RenderObject::setIsInScrollAnchoringAncestorChain):
(WebCore::RenderObject::RenderObjectBitfields::RenderObjectBitfields):
* Source/WebCore/rendering/style/RenderStyle.cpp:
(WebCore::RenderStyle::scrollAnchoringSuppressionStyleDidChange const):
(WebCore::RenderStyle::absolutePositionStyleDidChange const):
* Source/WebCore/rendering/style/RenderStyle.h:
Canonical link: https://commits.webkit.org/270455@main
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