What is the correct behavior if a lookupNamespaceURI call moves nodes
between documents? In particular, what is the correct behavior is the
Element node the call is being made on is moved to a different document
during the lookupNamespaceURI call (using adoptNode)?
The reason this matters is that the case-sensitivity of selectors
depends on the host language. At the moment, in Gecko, this is
determined by the Document object. In particular, the obvious object to
use for purposes of querySelector(All) is the ownerDocument of the
Element the method is called on (if the call is made on a Document,
there is no problem here at all). But if the ownerDocument can change
during a lookupNamespaceURI call, then the parsed selector's
case-sensitivity may no longer match the host language of the Element's
ownerDocument.
The spec should clearly specify what a UA is expected to do here. My
personal preference is that if the ownerDocument has changed the UA
should throw an exception, since there is no way to return a "correct"
result at that point.
-Boris
- [selectors-api] NSResolver moving nodes between docum... Boris Zbarsky
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