Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 2861d8c4e29ca8c3384e47f260a0d0e1823c29ae
https://github.com/WebKit/WebKit/commit/2861d8c4e29ca8c3384e47f260a0d0e1823c29ae
Author: Cathie Chen <[email protected]>
Date: 2023-02-01 (Wed, 01 Feb 2023)
Changed paths:
M
LayoutTests/imported/w3c/web-platform-tests/resize-observer/notify-expected.txt
M
LayoutTests/imported/w3c/web-platform-tests/resize-observer/observe-expected.txt
M
LayoutTests/imported/w3c/web-platform-tests/resize-observer/svg-expected.txt
A
LayoutTests/platform/mac-wk1/imported/w3c/web-platform-tests/resize-observer/notify-expected.txt
M
LayoutTests/platform/mac/imported/w3c/web-platform-tests/resize-observer/svg-expected.txt
M Source/WebCore/page/ResizeObservation.cpp
M Source/WebCore/page/ResizeObserver.cpp
M Source/WebCore/page/ResizeObserver.h
Log Message:
-----------
[ResizeObserver] The initial last reported size of ResizeObservation should
be -1x-1 which always notify observed elements
https://bugs.webkit.org/show_bug.cgi?id=251015
Reviewed by Oriol Brufau and Ryosuke Niwa.
This patch initializes the lastReportedSize of ResizeObservation to -1 x -1,
which is the conclusion of [1],
it indicates that -1 x -1 is the initial size when first observing an element
with ResizeObserver.
The previous change makes every ResizeObservation be delivered at least once,
even if the target is a disconnected element.
When GC happens between observe and gather ResizeObservations,
JSC::Weak<JSC::JSObject> m_callback inside JSCallbackDataWeak
could be released, and the element and JSResizeObserver might not be released,
for they are not strong connected, this scenario
would trigger the ASSERT in ResizeObserver::deliverObservations. To fix it,
this patch adds m_targetsWaitingForFirstObservation
to extend the life cycle of ResizeObserver to the first time of
deliverObservations. The fix is similar to
what IntersectionObserver does in bug 231235.
The test6 of resize-observer/notify.html still fails in mac-wk1, because
updaterendering is not triggered properly.
Filed [2] to track it.
[1] https://github.com/w3c/csswg-drafts/issues/3664
[2] https://bugs.webkit.org/show_bug.cgi?id=250900
*
LayoutTests/imported/w3c/web-platform-tests/resize-observer/notify-expected.txt:
*
LayoutTests/imported/w3c/web-platform-tests/resize-observer/observe-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/resize-observer/svg-expected.txt:
*
LayoutTests/platform/mac-wk1/imported/w3c/web-platform-tests/resize-observer/notify-expected.txt:
Copied from
LayoutTests/imported/w3c/web-platform-tests/resize-observer/notify-expected.txt.
*
LayoutTests/platform/mac/imported/w3c/web-platform-tests/resize-observer/svg-expected.txt:
* Source/WebCore/page/ResizeObservation.cpp:
* Source/WebCore/page/ResizeObserver.cpp:
(WebCore::ResizeObserver::observe):
(WebCore::ResizeObserver::deliverObservations):
(WebCore::ResizeObserver::isReachableFromOpaqueRoots const):
(WebCore::ResizeObserver::removeAllTargets):
(WebCore::ResizeObserver::removeObservation):
* Source/WebCore/page/ResizeObserver.h:
Canonical link: https://commits.webkit.org/259673@main
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