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selectors: Simplify :visited by only using the "is inside link" information.

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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.
This commit is contained in:
Emilio Cobos Álvarez 2017-12-08 04:48:03 +01:00
parent e4bb3a102e
commit 3119db724a
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10 changed files with 128 additions and 208 deletions
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5
components/script/dom/element.rs
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@ -89,7 +89,8 @@ use script_layout_interface::message::ReflowGoal;
use script_thread::ScriptThread;
use selectors::Element as SelectorsElement;
use selectors::attr::{AttrSelectorOperation, NamespaceConstraint, CaseSensitivity};
use selectors::matching::{ElementSelectorFlags, MatchingContext, RelevantLinkStatus};
use selectors::context::VisitedHandlingMode;
use selectors::matching::{ElementSelectorFlags, MatchingContext};
use selectors::sink::Push;
use servo_arc::Arc;
use servo_atoms::Atom;
@ -2635,7 +2636,7 @@ impl<'a> SelectorsElement for DomRoot<Element> {
&self,
pseudo_class: &NonTSPseudoClass,
_: &mut MatchingContext<Self::Impl>,
_: &RelevantLinkStatus,
_: VisitedHandlingMode,
_: &mut F,
) -> bool
where