зеркало из https://github.com/mozilla/gecko-dev.git
584d9d8e68
This patch fixes two issues, described below:
First, the GetTopLevelDocument function was looking at the browsing
context tree. It should look at the window context tree, as looking at
the browsing context tree means that if you're in a discarded or
about-to-get-discarded document, you can end up with a document from a
different tree. Computing intersections between those of course makes no
sense and triggers the assertion we're enabling.
Second, this patch fixes an issue when you have fission enabled, and a
setup such as:
A1 -> B1 -> A2
If you try to use IntersectionObserver from A2 with the implicit root,
we'd end up with:
* rootRect: A1's root scrollport rect (this is fine, because it's only
used to compute the root margin and bounds and so on, not
to compute geometry).
* rootFrame: A1's root scroll frame (this is _not_ fine, see below).
Then, we'd try to map rects from A2's target to A1's viewport, and we
can't really do that sensibly with the existing nsLayoutUtils functions,
because we're not accounting for all the OOP iframe transforms that may
be going on. This also triggers the assertion that this patch enables in
same-origin-grand-child-iframe.sub.html.
To fix it, for the A2 case, use the same code that we have for other OOP
iframes. The test tweaks fails with fission enabled without the patch
(because we don't account for the OOP iframe clip).
Differential Revision: https://phabricator.services.mozilla.com/D92089
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| .. | ||
| base | ||
| build | ||
| docs | ||
| forms | ||
| generic | ||
| inspector | ||
| ipc | ||
| mathml | ||
| media | ||
| painting | ||
| printing | ||
| reftests | ||
| style | ||
| svg | ||
| tables | ||
| tools | ||
| xul | ||
| moz.build | ||