Summary:
This fixes a couple fuzz bugs and prevents special-casing <svg:use> even more in
bug 1431255.
Unfortunately not as many hacks went away as I'd have hoped, since we still need
to match document rules, see the linked SVGWG issues.
But blocks_ancestor_combinators goes away, which is nice since it's on a very
hot path.
Test Plan: WPT for style invalidation, covered by existing tests otherwise.
Reviewers: heycam
Tags: #secure-revision
Bug #: 1450250
Differential Revision: https://phabricator.services.mozilla.com/D2154
MozReview-Commit-ID: C4mthjoSNFh
Now that rustfmt is getting close to stable, and work on the style system has died down a bit, it seemed like an opportune time to auto-format the style crates.
The first commit disables import reordering, since tidy and rustfmt don't currently agree on the correct ordering. The second commit does a bunch of manual fixups such that the output of rustfmt passes tidy. The third commit runs rustfmt on the three aforementioned crate.
There are a few dozen warnings in the style crate about lines longer than 100 characters. It would be good to fix these, but I don't have time for that now.
Source-Repo: https://github.com/servo/servo
Source-Revision: 9a900ef019cd643bff961d7b20db6da69f3edb29
We could invalidate in a slightly more fine-grained way, but I don't think it's
worth the churn vs. keeping the special-cases minimal.
Bug: 1452640
Reviewed-by: xidorn
MozReview-Commit-ID: 5DkQrgwg9GW
Source-Repo: https://github.com/servo/servo
Source-Revision: e11c2d97552d192b761b0684c8c6852b9dea0921
Kinda tricky because :host only matches rules on the shadow root where the rules
come from. So we need to be careful during invalidation and style sharing.
I didn't use the non_ts_pseudo_class_list bits because as soon as we implement
the :host(..) bits we're going to need to special-case it anyway.
The general schema is the following:
* Rightmost featureless :host selectors are handled inserting them in the
host_rules hashmap. Note that we only insert featureless stuff there. We
could insert all of them and just filter during matching, but that's slightly
annoying.
* The other selectors, like non-featureless :host or what not, are added to the
normal cascade data. This is harmless, since the shadow host rules are never
matched against the host, so we know they'll just never match, and avoids
adding more special-cases.
* Featureless :host selectors to the left of a combinator are handled during
matching, in the special-case of next_element_for_combinator in selectors.
This prevents this from being more invasive, and keeps the usual fast path
slim, but it's a bit hard to match the spec and the implementation.
We could keep a copy of the SelectorIter instead in the matching context to
make the handling of featureless-ness explicit in match_non_ts_pseudo_class,
but we'd still need the special-case anyway, so I'm not fond of it.
* We take advantage of one thing that makes this sound. As you may have
noticed, if you had `root` element which is a ShadowRoot, and you matched
something like `div:host` against it, using a MatchingContext with
current_host == root, we'd incorrectly report a match. But this is impossible
due to the following constraints:
* Shadow root rules aren't matched against the host during styling (except
these featureless selectors).
* DOM APIs' current_host needs to be the _containing_ host, not the element
itself if you're a Shadow host.
Bug: 992245
Reviewed-by: xidorn
MozReview-Commit-ID: KayYNfTXb5h
Source-Repo: https://github.com/servo/servo
Source-Revision: cb754b262747e7cab794411df55588f0f0b30b5e
This changes the order to match the normal selector-matching order, which is
usually faster.
That is, when matching div:nth-child(2), for example, before this patch we'd
first try to match :nth-child(2), and only then div.
This patch makes us walk until the end or the next combinator, and only then
match backwards, matching first div, then :nth-child.
Bug: 1443814
Reviewed-by: bholley
Source-Repo: https://github.com/servo/servo
Source-Revision: 8e52f8a523e2f12b2666536d0f8ff3fa40b83ef5
This is the "better way" I mentioned in #19774, which seems to actually improve the score of dromaeo_css on talos.
Source-Repo: https://github.com/servo/servo
Source-Revision: 525758ea5ef67148c28acae9404916691e9a960c
Without turning it on yet, of course.
The reason why I didn't use the general PseudoElement mechanism is because this
pseudo is a bit of its own thing, and I found easier to make ::selectors know
about it (because you need to jump to the assigned slot) than the other way
around.
Also, we need to support ::slotted(..)::before and such, and supporting multiple
pseudo-elements like that breaks some other invariants around the SelectorMap,
and fixing those would require special-casing slotted a lot more in other parts
of the code.
Let me know if you think otherwise.
I also don't like much the boolean tuple return value, but I plan to do some
cleanup in the area in a bit, so it should go away soon, I'd hope.
Source-Repo: https://github.com/servo/servo
Source-Revision: f5129ef7b5efa59a176cac98dc68d910cb3279c9
Right now we go through a lot of hoops to see if we ever see a relevant link.
However, that information is not needed: if the element is a link, we'll always
need to compute its visited style because its its own relevant link.
If the element inherits from a link, we need to also compute the visited style
anyway.
So the "has a relevant link been found" is pretty useless when we know what are
we inheriting from.
The branches at the beginning of matches_complex_selector_internal were
affecting performance, and there are no good reasons to keep them.
I've verified that this passes all the visited tests in mozilla central, and
that the test-cases too-flaky to be landed still pass.
Source-Repo: https://github.com/servo/servo
Source-Revision: 7a8733723551201d2c06acde9b0915b4c03938b4
These methods are instantiated by the Gecko library, and used during
querySelector, which means that they end up being super-hot in micro-benchmarks.
MozReview-Commit-ID: K1XJb0QyX5a
Source-Repo: https://github.com/servo/servo
Source-Revision: 85fa6409bb699647b4f5e22952538365e87418d7
See #18809
Still haven't had time to test it but it should fix the tests failures that appeared in m-c
Source-Repo: https://github.com/servo/servo
Source-Revision: fe4139b779b3af749ec1426ddf4e1393c7b85442
It still needs dependencies update to remove all the other bitflags
versions.
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes do not require tests because it's a dependency update
Source-Repo: https://github.com/servo/servo
Source-Revision: fe16c1d5c3c9084da0ccb85af599d6ec0f8ab20b
This will help Xidorn implement tree pseudos, and in general makes sense,
allowing to put specific matching data in a selectors implementation.
Source-Repo: https://github.com/servo/servo
Source-Revision: 6268f482084179ed54e63028da038ae39c947359
This will make easier to create external invalidations that don't point to a combinator,
and also makes reasoning about the invalidator a bit easier.
Source-Repo: https://github.com/servo/servo
Source-Revision: a759ded65d965b54c535c74d460f60a782e51487
This type is a lot of complexity related to a very specific thing such as the
hover and active quirk.
Instead of that, move `nesting_level` to `MatchingContext`, and simplify all
this computing whether the quirk applies upfront, for each complex selector we
test.
This is less error-prone, and also allows simplifying more stuff in a bit.
Also, this makes the hover and active quirk work in Servo with no extra effort.
Source-Repo: https://github.com/servo/servo
Source-Revision: a200fb4b9df4e7461b4238fe3a6d49881f438e25
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Automatically verify that derive() lists are alphabetically ordered #18172
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Source-Revision: 474369618965569407d127b1e8c481e757cc59d3
