tree 273c437794df7c8b60989413d67c1d0da3c61655
parent 3f43aac3d7580a7dc2d3c85937cd4cb8c6f65278
author graouts@webkit.org <graouts@webkit.org@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1571934908 +0000
committer graouts@webkit.org <graouts@webkit.org@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1571934908 +0000

[Web Animations] Only process CSS properties affected by a given CSS transition
https://bugs.webkit.org/show_bug.cgi?id=203238

Reviewed by Simon Fraser.

When the "transition" property, or one of its longhands, would change we would iterate over every known CSS property to identify whether the before and after
styles showed reasons to create, modify or cancel a backing CSSTransition object. However, we only need to do this in the case where "transition-property" is
"all", ie. where the Animation object has its animationMode() set to Animation::AnimateAll. In all other cases, we only need to iterate over the CSS properties
specified by "transition-property".

We now compile a list of CSS properties to iterate over by looking at all properties listed in the "transition-property" for the before and after styles.

* animation/AnimationTimeline.cpp:
(WebCore::compileTransitionPropertiesInStyle):
(WebCore::AnimationTimeline::updateCSSTransitionsForElementAndProperty):
(WebCore::AnimationTimeline::updateCSSTransitionsForElement):
* animation/AnimationTimeline.h:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@251543 268f45cc-cd09-0410-ab3c-d52691b4dbfc