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style: Cleanup selector-matching for nested pseudo-elements, match ::slotted correctly when there's no selector before it, and add tests.

Browse source 
D29542 fixed the bogus checks that was making nested pseudo-elements match
author rules. This adds tests and ends up being just a cleanup, though as it
turns out we it also fixes an issue with ::slotted() matched from
Element.matches.

Differential Revision: https://phabricator.services.mozilla.com/D27529
This commit is contained in:
Emilio Cobos Álvarez 2019-05-24 01:09:15 +00:00
parent 272d9758d7
commit 43444db8a8
9 changed files with 35 additions and 38 deletions
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5
components/style/style_adjuster.rs
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@ -734,10 +734,7 @@ impl<'a, 'b: 'a> StyleAdjuster<'a, 'b> {
E: TElement,
{
if cfg!(debug_assertions) {
if element
.and_then(|e| e.implemented_pseudo_element())
.is_some()
{
if element.map_or(false, |e| e.is_pseudo_element()) {
// It'd be nice to assert `self.style.pseudo == Some(&pseudo)`,
// but we do resolve ::-moz-list pseudos on ::before / ::after
// content, sigh.