[Webkit-unassigned] [Bug 85318] New: Avoid creating huge layers for large negative text-indent

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=85318

           Summary: Avoid creating huge layers for large negative
                    text-indent
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: simon.fraser at apple.com
                CC: hyatt at apple.com, mitz at webkit.org, jamesr at chromium.org


Many sites use CSS like text-indent: -9999px as an image replacement technique <http://css-tricks.com/css-image-replacement/>. However, this often results in compositing layers being huge, since we make the layers large enough to contain that offset text.

We should add some smarts to detect whether the text-indent pushes the text outside the viewport, and avoid the stupidly large layers in that case.

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