16759 2008-01-05 19:03:52 -0800 TreeWalker change to forbid leaving the subtree (bug 16758) regressed us on Acid3 2019-02-06 09:03:29 -0800 1 1 1 Unclassified WebKit DOM 528+ (Nightly build) Mac OS X 10.4 RESOLVED DUPLICATE 3492 P2 Normal --- 1 eric darin cdumez ian sam oldest_to_newest 66329 0 eric 2008-01-05 19:03:52 -0800 I think bug 16758 regressed us on the Acid3 We added a failure: Test 10: FAIL (failed to handle regrafting correctly) function () { // test 10: walking outside a tree var doc = getTestDocument(); var p = doc.createElement('p'); doc.body.appendChild(p); var b = doc.body; var w = document.createTreeWalker(b, 0xFFFFFFFF, null, true); assert(w.currentNode == b, "basic use of TreeWalker failed: currentNode"); assert(w.lastChild() == p, "basic use of TreeWalker failed: lastChild()"); assert(w.previousNode() == b, "basic use of TreeWalker failed: previousNode()"); doc.documentElement.removeChild(b); assert(w.lastChild() == p, "TreeWalker failed after removing the current node from the tree"); assert(w.nextNode() == null, "failed to walk into the end of a subtree"); doc.documentElement.appendChild(p); assert(w.previousNode() == doc.getElementsByTagName('title')[0], "failed to handle regrafting correctly"); p.appendChild(b); assert(w.nextNode() == p, "couldn't retrace steps"); assert(w.nextNode() == b, "couldn't step back into root"); assert(w.previousNode() == null, "root didn't retake its rootish position"); return 1; }, 66340 1 sam 2008-01-05 20:25:04 -0800 I believe I introduced this issue by explicitly checking that the returned node of the TreeWalker methods isDescendantOf(rootNode). Therefore, if the rootNode is removed and currentNode is re-inserted, this check will always fail and cause null to be returned. I am not sure what the correct behavior is however. 66348 2 ian 2008-01-05 22:53:26 -0800 TreeWalkers are exclusively dependent on their currentNode (unlike Ranges, which are dependent just on the Document/DocumentFragment/Attr they were originally bound to). You can TreeWalk right from one Document to another, if the Node in question is adopt()ed in between, for instance. You can similarly keep walking even if the node is removed from the root and made an orphan, and keep walking if the node is grafted above it, or whatever. 66413 3 18306 sam 2008-01-06 15:54:33 -0800 Created attachment 18306 fix 66415 4 18306 eric 2008-01-06 16:22:07 -0800 Comment on attachment 18306 fix Sam said he would post a few more tests. For example: - what about walking between documents (adopting a node during the walk) - what about tree manipulations during the walk? - should firstChild/lastChild/or previousSibling ever be able to walk "past" the root? It's really the test which I care about more than the patch. The patch looks fine. The question is just if we have and are testing the correct behavior. 66432 5 18306 eric 2008-01-06 20:36:08 -0800 Comment on attachment 18306 fix r- until the additional test cases are posted. We could land this, but it's best to wait. 66679 6 darin 2008-01-09 13:05:40 -0800 My patch in bug 3492 fixes this. I didn't find this bug because I searched for TreeWalker in bug titles only. 66686 7 darin 2008-01-09 14:31:53 -0800 I think this is effectively a duplicate of bug 3492. *** This bug has been marked as a duplicate of 3492 *** 1502976 8 lforschler 2019-02-06 09:03:29 -0800 Mass moving XML DOM bugs to the "DOM" Component. 18306 2008-01-06 15:54:33 -0800 2008-01-06 20:36:08 -0800 fix patch.diff text/plain 12020 sam SW5kZXg6IFdlYkNvcmUvQ2hhbmdlTG9nCj09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT0KLS0tIFdlYkNvcmUvQ2hhbmdlTG9n CShyZXZpc2lvbiAyOTIxNikKKysrIFdlYkNvcmUvQ2hhbmdlTG9nCSh3b3JraW5nIGNvcHkpCkBA IC0xLDMgKzEsMjYgQEAKKzIwMDgtMDEtMDYgIFNhbSBXZWluaWcgIDxzYW1Ad2Via2l0Lm9yZz4K KworICAgICAgICBSZXZpZXdlZCBieSBOT0JPRFkgKE9PUFMhKS4KKworICAgICAgICBGaXggZm9y IGh0dHA6Ly9idWdzLndlYmtpdC5vcmcvc2hvd19idWcuY2dpP2lkPTE2NzU5CisgICAgICAgIGJ1 ZyAxNjc1OCByZWdyZXNzZWQgdXMgb24gdGhlIEFjaWQzCisKKyAgICAgICAgLSBBIGRlZXBlciB1 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