Re: The Unwanted Effect of XBL Shadow DOM Elements on Layout

On Thu, Apr 7, 2011 at 1:20 PM, Boris Zbarsky <bzbarsky@mit.edu> wrote:
> On 4/7/11 8:43 AM, Tab Atkins Jr. wrote:
>>
>> We have also run into this problem in our discussion of
>> XBL2/Component use-cases, and in fact already use essentially this
>> concept in our Component implementation - the root of a shadow tree is
>> implemented as an element, but it doesn't appear in the box tree.
>
> That's quite different from the problem Lachlan is talking about.  What
> you're saying is that the root of the shadow tree does not appear in the
> final flattened tree at all, which is true.  What Lachlan wants is things
> that appear in the final flattened tree but do not generate boxes of their
> own; their children's boxes are just placed in their parent instead.

For our own implementation purposes, they are equivalent (I think) -
the shadow root is treated as part of the document, in that the shadow
nodes see it as an ancestor, but it's transparent when constructing
the render tree.

~TJ