Bug 76146 – NodeIterator loses track of the reference node when the reference node is removed from the document (IETC ni_removeReferenceNode)

• Component: New Bugs
• Status: RESOLVED FIXED

[Adam Barth]

NodeIterator loses track of the reference node when the reference node is removed from the document (IETC ni_removeReferenceNode)

[Adam Barth]

Created attachment 122167 [details]
Patch

[Ryosuke Niwa]

Comment on attachment 122167 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=122167&action=review

> Source/WebCore/dom/NodeIterator.cpp:185
> +            while (node && node->isDescendantOf(removedNode))
> +                node = node->traverseNextNode(root());

This is every inefficient way to find the next node. If node is a descendant of the removed node, then the next node should be removedNode->traverseNextSibling(), no?

[Adam Barth]

@darin: I've been told that you're the expert on this code.  This function is pretty subtle.  If you have a few minutes to sanity-check this patch, that would be great.  Thanks!

[Darin Adler]

Comment on attachment 122167 [details]
Patch

I did fix quite a few bugs in this code a while back. The change in the code looks fine. I think to improve performance and correctness we’d want to add performance and correctness tests. This little-used barely-useful obscure corner of the DOM does not get a lot of attention or love.

[Adam Barth]

It looks like DOM4 has a reasonably simple specification of what to do when nodes are removed:

http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#interface-nodeiterator

I wonder if we can re-work our implementation to match the spec more closely.

[Adam Barth]

Comment on attachment 122167 [details]
Patch

I'm going to work on refactoring and adding more tests for NodeIterator in future bug.

[WebKit Review Bot]

Comment on attachment 122167 [details]
Patch

Clearing flags on attachment: 122167

Committed r104866: <http://trac.webkit.org/changeset/104866>

[WebKit Review Bot]

All reviewed patches have been landed.  Closing bug.