[Webkit-unassigned] [Bug 61491] Frame flattening is broken with nested frames

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=61491





--- Comment #6 from Kenneth Rohde Christiansen <kenneth at webkit.org>  2011-05-26 08:09:57 PST ---
I think the bug is elsewhere. The nested iframe has a fixed size and thus the flattenFrame() method is returning false:

 92     if (!isScrollable && style()->width().isFixed()
 93         && style()->height().isFixed())
             return false;

Regarding the absoluteBoundingBoxRect().intersects() test. Basically to check if something is offscreen, either of the left values of absoluteBoundingBoxRect() needs to be negative.

The code could probably be rewritten to something like:

    // Do not flatten offscreen inner frames during frame flattening.
    IntRect rect = absoluteBoundingBoxRect();
    int rightX = rect.x() + rect.width();
    int rightY = rect.y() + rect.height();

    return rightX > 0 && rightY > 0;

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