303478 - handle dynamic changes to xml:base?

Status: RESOLVED WONTFIX

(Core :: DOM: Core & HTML, defect, P5)

Description

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

In bug 78510 roc started adding some code to handle dynamic changes of xml:base,
but I didn't think the approach he was following was right, and it only
half-fixed one case.  It seems like what we probably want to do to handle
dynamic changes of xml:base is call UnbindFromTree and then BindToTree, since
these methods already have to handle switching between different base URIs.  I'm
not sure if that would have any unintended side-effects, though.

(Am I missing existing code that handles this?  I haven't written any testcases,
but I wanted to get this filed before forgetting about it.)

Comment 1

[Boris Zbarsky [:bzbarsky]]

So if I have something like:

<div>
  <img src="foo">
</div>

And I change the xml:base on the div we want the image being shown to update,
right?  I assume that's what this bug is about...

If so, then unbind/bind will work, but will reload all documents in subframes
(due to a bug I can't find right now).

Comment 2

[Hixie (not reading bugmail)]

Note that the HTML spec wouldn't update the image in that case. In fact, the HTML spec is designed to make base URL changes have a very minimal impact on browsers; basically the only thing that they do is cause any URLs being shown to the user (e.g. the status bar when you're over a hyperlink) change:

   http://www.whatwg.org/specs/web-apps/current-work/#dynamic-changes-to-base-urls

Comment 3

[Firefox Bug Husbandry Bot]

https://bugzilla.mozilla.org/show_bug.cgi?id=1472046

Move all DOM bugs that haven’t been updated in more than 3 years and has no one currently assigned to P5.

If you have questions, please contact :mdaly.

Comment 4

[Jonathan Kingston [:jkt] he/him]

Marking WONTFIX as Bug 903372 removed support for xml:base. Even if it is reopened, I don't think we intent to continue support for this feature.