[Webkit-unassigned] [Bug 87494] New: Body scrollWidth() and scrollHeight() should be page scale-invariant

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=87494

           Summary: Body scrollWidth() and scrollHeight() should be page
                    scale-invariant
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: HTML DOM
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: jknotten at chromium.org


RenderView::documentRect() is calculating the "scaled" document rect by applying
the current transformation matrix to the unscaledDocumentRect() and then
returning the rounded-out IntRect result.

This rounding out is incorrect because it allows the scaled rectangle to
represent an area that is not actually covered by the document.

This is evidenced by the document.body.scrollWidth() and
document.body.scrollHeight() changing under page scale factor when
they are expected to remain invariant.

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