Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 433599a15892af435851c20280e58a0cc91596cb
      
https://github.com/WebKit/WebKit/commit/433599a15892af435851c20280e58a0cc91596cb
  Author: Antoine Quint <[email protected]>
  Date:   2024-10-14 (Mon, 14 Oct 2024)

  Changed paths:
    M 
LayoutTests/imported/w3c/web-platform-tests/scroll-animations/view-timelines/animation-events-expected.txt
    M 
LayoutTests/imported/w3c/web-platform-tests/web-animations/interfaces/Animation/scroll-timeline-progress.tentative-expected.txt
    A 
LayoutTests/platform/glib/imported/w3c/web-platform-tests/web-animations/interfaces/Animation/scroll-timeline-progress.tentative-expected.txt
    M Source/WebCore/animation/WebAnimation.cpp
    M Source/WebCore/animation/WebAnimation.h

  Log Message:
  -----------
  [web-animations] implement the "auto-align start time" procedure
https://bugs.webkit.org/show_bug.cgi?id=281420
rdar://137867653

Reviewed by Tim Nguyen.

Web Animations Level 2 introduces an "auto-aligning the start time" procedure 
for progress-based
animations, such as Scroll-driven Animations. We already added the flag that 
indicates that an
animation needs to auto-align its start time in 284815@main, and now we 
implement the procedure
to act on that flag and implement 
https://drafts.csswg.org/web-animations-2/#auto-aligning-start-time.

* 
LayoutTests/imported/w3c/web-platform-tests/scroll-animations/view-timelines/animation-events-expected.txt:
* 
LayoutTests/imported/w3c/web-platform-tests/web-animations/interfaces/Animation/scroll-timeline-progress.tentative-expected.txt:
* 
LayoutTests/platform/glib/imported/w3c/web-platform-tests/web-animations/interfaces/Animation/scroll-timeline-progress.tentative-expected.txt:
 Added.
* Source/WebCore/animation/WebAnimation.cpp:
(WebCore::WebAnimation::play):
(WebCore::WebAnimation::autoAlignStartTime):
(WebCore::WebAnimation::tick):
* Source/WebCore/animation/WebAnimation.h:

Canonical link: https://commits.webkit.org/285176@main



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