[Webkit-unassigned] [Bug 85863] [Shadow] Style elements in Shadow DOM should not be exposed by document.styleSheets attribute

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=85863





--- Comment #4 from Hajime Morrita <morrita at google.com>  2012-05-23 17:01:58 PST ---
(In reply to comment #3)
> (From update of attachment 143440 [details])
> While I'm no shadow DOM expert, I feel that this patch needs more explanation of what's going on.
> 
> Why are we skipping over StyleElement::insertedIntoDocument/removedFromDocument? That will not only prevent document.styleSheets from exposing the sheet, but also prevent StyleElement from parsing the sheet, and StyleResolver from applying any of its style (since it gets its sheet data from there.)
> 

> Maybe <style> elements are supposed to just hang dead inside a shadow subtree?
It's going to be scoped by Shadow DOM, that is, the style is applied 
only for shadow subtrees.
dvcs.w3.org/hg/webcomponents/raw-file/tip/spec/shadow/index.html#styles

I agree Kling's point though.
This change could be done as a part of style scoping,
instead of just doing a band-aid fix.

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