[Webkit-unassigned] [Bug 199269] New: Computation of nested touch-action elements is wrong

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=199269

            Bug ID: 199269
           Summary: Computation of nested touch-action elements is wrong
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: UI Events
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: graouts at apple.com

Created attachment 373021

  --> https://bugs.webkit.org/attachment.cgi?id=373021&action=review

Layout test

The following will yield a "touch-action: none" event region for the innermost <div>:

<style>

div {
    position: absolute;
    top: 0;
    left: 0;
    width: 400px;
    height: 400px;
}

.manipulation {
    touch-action: manipulation;
}

.pan-y {
    touch-action: pan-y;
}

</style>
<div class="manipulation">
    <div class="pan-y">
        <div class="manipulation"></div>
    </div>
</div>

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