[webkit-dev] How to interrupt Webkit Dump Render Tree output

tonikitoo (Antonio Gomes) tonikitoo at gmail.com
Wed Jun 10 13:58:35 PDT 2009

On Mon, Jun 1, 2009 at 1:31 PM, Simon Fraser<simon.fraser at apple.com> wrote:
> There is a method on RenderObject to get the correct absolute coordinates of
> the renderer, which correctly takes transforms, scrolling etc into account:
> RenderObject::localToAbsolute(). This is not a trivial problem.

localToAbsolute() is only "fragile" because if you are querying for
the position of a renderobject inside an iframe, it is not relative to
mainFrame but to the currentFrame. I've done it like below:

static inline IntRect absoluteRenderRect(RenderObject* render)
    // FIXME: This function is flawed because it doesn't consider the
effects of CSS or SVG transforms.

    IntRect rect(render->absoluteClippedOverflowRect());

    // handle nested frames.
    for (Frame* frame = render->document()->frame(); frame; frame =
        if(HTMLFrameOwnerElement* ownerElement = frame->ownerElement())

    return rect;

maybe there is a better way , but ...

--Antonio Gomes

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