[Webkit-unassigned] [Bug 91643] New: webkit-transform: scale() operations cause incorrect scrollbars on view

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=91643

           Summary: webkit-transform: scale() operations cause incorrect
                    scrollbars on view
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: jmayhew at motorola.com


If a scale transform which results in content becoming larger than the browser view is performed, the views scrollbars do not properly update until the browser is resized or the DOM is manipulated via code.

The attached file demonstrates this.

1) open the file in the browser. 
2) resize the browser to be larger than the yellow area
2) click on the red div to trigger the scale operation.
3) notice that the scroll bars in the browser are not correct and have not updated to allow scrolling of the larger content.
4) either resize the browser window or click in the green div which will trigger a DOM change by changing the left value of a block element. The scrollbars are now updated.
To repeat the process, simply click the red div again to scale it back down. The same scrollbar update issue happens then as well.

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