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Pull decls from Gecko for link preshints

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Based on a link's active state and the visited handling mode, pull in link,
vlink, and alink preshint declaration blocks from Gecko as needed.

MozReview-Commit-ID: A6udMYbzQnK
This commit is contained in:
J. Ryan Stinnett 2017-06-01 13:37:54 -05:00
parent fa158a78b6
commit 56b44d2709
5 changed files with 59 additions and 10 deletions
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41
components/style/gecko/wrapper.rs
View file

@ -35,12 +35,15 @@ use gecko_bindings::bindings::Gecko_ClassOrClassList;
use gecko_bindings::bindings::Gecko_ElementHasAnimations;
use gecko_bindings::bindings::Gecko_ElementHasCSSAnimations;
use gecko_bindings::bindings::Gecko_ElementHasCSSTransitions;
use gecko_bindings::bindings::Gecko_GetActiveLinkAttrDeclarationBlock;
use gecko_bindings::bindings::Gecko_GetAnimationRule;
use gecko_bindings::bindings::Gecko_GetExtraContentStyleDeclarations;
use gecko_bindings::bindings::Gecko_GetHTMLPresentationAttrDeclarationBlock;
use gecko_bindings::bindings::Gecko_GetSMILOverrideDeclarationBlock;
use gecko_bindings::bindings::Gecko_GetStyleAttrDeclarationBlock;
use gecko_bindings::bindings::Gecko_GetStyleContext;
use gecko_bindings::bindings::Gecko_GetUnvisitedLinkAttrDeclarationBlock;
use gecko_bindings::bindings::Gecko_GetVisitedLinkAttrDeclarationBlock;
use gecko_bindings::bindings::Gecko_IsSignificantChild;
use gecko_bindings::bindings::Gecko_MatchStringArgPseudo;
use gecko_bindings::bindings::Gecko_UnsetDirtyStyleAttr;
@ -66,7 +69,8 @@ use rule_tree::CascadeLevel as ServoCascadeLevel;
use selector_parser::ElementExt;
use selectors::Element;
use selectors::attr::{AttrSelectorOperation, AttrSelectorOperator, CaseSensitivity, NamespaceConstraint};
use selectors::matching::{ElementSelectorFlags, MatchingContext, MatchingMode, RelevantLinkStatus};
use selectors::matching::{ElementSelectorFlags, MatchingContext, MatchingMode};
use selectors::matching::{RelevantLinkStatus, VisitedHandlingMode};
use shared_lock::Locked;
use sink::Push;
use std::cell::RefCell;
@ -1036,7 +1040,9 @@ impl<'le> Hash for GeckoElement<'le> {
}
impl<'le> PresentationalHintsSynthesizer for GeckoElement<'le> {
fn synthesize_presentational_hints_for_legacy_attributes<V>(&self, hints: &mut V)
fn synthesize_presentational_hints_for_legacy_attributes<V>(&self,
visited_handling: VisitedHandlingMode,
hints: &mut V)
where V: Push<ApplicableDeclarationBlock>,
{
use properties::longhands::_x_lang::SpecifiedValue as SpecifiedLang;
@ -1098,6 +1104,37 @@ impl<'le> PresentationalHintsSynthesizer for GeckoElement<'le> {
);
}
// Support for link, vlink, and alink presentation hints on <body>
if self.is_link() {
// Unvisited vs. visited styles are computed up-front based on the
// visited mode (not the element's actual state).
let declarations = match visited_handling {
VisitedHandlingMode::AllLinksUnvisited => unsafe {
Gecko_GetUnvisitedLinkAttrDeclarationBlock(self.0)
},
VisitedHandlingMode::RelevantLinkVisited => unsafe {
Gecko_GetVisitedLinkAttrDeclarationBlock(self.0)
},
};
let declarations = declarations.and_then(|s| s.as_arc_opt());
if let Some(decl) = declarations {
hints.push(
ApplicableDeclarationBlock::from_declarations(Clone::clone(decl), ServoCascadeLevel::PresHints)
);
}
let active = self.get_state().intersects(NonTSPseudoClass::Active.state_flag());
if active {
let declarations = unsafe { Gecko_GetActiveLinkAttrDeclarationBlock(self.0) };
let declarations = declarations.and_then(|s| s.as_arc_opt());
if let Some(decl) = declarations {
hints.push(
ApplicableDeclarationBlock::from_declarations(Clone::clone(decl), ServoCascadeLevel::PresHints)
);
}
}
}
// xml:lang has precedence over lang, which can be
// set by Gecko_GetHTMLPresentationAttrDeclarationBlock
//