[Webkit-unassigned] [Bug 194941] New: Retargeting an in-flight transition should account for the transformed progress of the initial transition to compute its duration

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=194941

            Bug ID: 194941
           Summary: Retargeting an in-flight transition should account for
                    the transformed progress of the initial transition to
                    compute its duration
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Animations
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: graouts at apple.com
                CC: dino at apple.com

Created attachment 362707

  --> https://bugs.webkit.org/attachment.cgi?id=362707&action=review

Test case

See the attached test case. In this example we initially run a transition for 5 seconds, and 2 seconds into its run we change its to-value. In our implementation both the initial and the retargeted transition have the same duration: 5 seconds. However, the retargeted transition should compute its duration by factoring the transformed progress (accounting for the timing-function) of the initial duration when it's interrupted and the transition-duration.

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