Update to selectors 0.15

components/layout/Cargo.toml

@@ -34,7 +34,7 @@ range = {path = "../range"}
 rayon = "0.5"
 script_layout_interface = {path = "../script_layout_interface"}
 script_traits = {path = "../script_traits"}
-selectors = "0.14"
+selectors = "0.15"
 serde = "0.8"
 serde_derive = "0.8"
 serde_json = "0.8"

components/layout_thread/Cargo.toml

@@ -31,7 +31,7 @@ rayon = "0.5"
 script = {path = "../script"}
 script_layout_interface = {path = "../script_layout_interface"}
 script_traits = {path = "../script_traits"}
-selectors = "0.14"
+selectors = "0.15"
 serde_derive = "0.8"
 serde_json = "0.8"
 servo_url = {path = "../url"}

components/script/Cargo.toml

@@ -66,7 +66,7 @@ regex = "0.1.43"
 rustc-serialize = "0.3"
 script_layout_interface = {path = "../script_layout_interface"}
 script_traits = {path = "../script_traits"}
-selectors = "0.14"
+selectors = "0.15"
 serde = "0.8"
 servo_atoms = {path = "../atoms"}
 servo_url = {path = "../url", features = ["servo"] }

components/script/dom/element.rs

@@ -73,7 +73,7 @@ use html5ever_atoms::{Prefix, LocalName, Namespace, QualName};
 use parking_lot::RwLock;
 use selectors::matching::{ElementFlags, MatchingReason, matches};
 use selectors::matching::{HAS_EDGE_CHILD_SELECTOR, HAS_SLOW_SELECTOR, HAS_SLOW_SELECTOR_LATER_SIBLINGS};
-use selectors::parser::{AttrSelector, NamespaceConstraint, parse_author_origin_selector_list_from_str};
+use selectors::parser::{AttrSelector, NamespaceConstraint};
 use servo_atoms::Atom;
 use std::ascii::AsciiExt;
 use std::borrow::Cow;
@@ -92,7 +92,7 @@ use style::properties::{DeclaredValue, Importance};
 use style::properties::{PropertyDeclaration, PropertyDeclarationBlock, parse_style_attribute};
 use style::properties::longhands::{background_image, border_spacing, font_family, font_size, overflow_x};
 use style::restyle_hints::RESTYLE_SELF;
-use style::selector_parser::{NonTSPseudoClass, RestyleDamage, ServoSelectorImpl};
+use style::selector_parser::{NonTSPseudoClass, RestyleDamage, ServoSelectorImpl, SelectorParser};
 use style::sink::Push;
 use style::stylist::ApplicableDeclarationBlock;
 use style::values::CSSFloat;
@@ -1885,10 +1885,10 @@ impl ElementMethods for Element {
 
     // https://dom.spec.whatwg.org/#dom-element-matches
     fn Matches(&self, selectors: DOMString) -> Fallible<bool> {
-        match parse_author_origin_selector_list_from_str(&selectors) {
+        match SelectorParser::parse_author_origin_no_namespace(&selectors) {
             Err(()) => Err(Error::Syntax),
-            Ok(ref selectors) => {
+            Ok(selectors) => {
-                Ok(matches(selectors, &Root::from_ref(self), None, MatchingReason::Other))
+                Ok(matches(&selectors.0, &Root::from_ref(self), None, MatchingReason::Other))
             }
         }
     }
@@ -1900,13 +1900,13 @@ impl ElementMethods for Element {
 
     // https://dom.spec.whatwg.org/#dom-element-closest
     fn Closest(&self, selectors: DOMString) -> Fallible<Option<Root<Element>>> {
-        match parse_author_origin_selector_list_from_str(&selectors) {
+        match SelectorParser::parse_author_origin_no_namespace(&selectors) {
             Err(()) => Err(Error::Syntax),
-            Ok(ref selectors) => {
+            Ok(selectors) => {
                 let root = self.upcast::<Node>();
                 for element in root.inclusive_ancestors() {
                     if let Some(element) = Root::downcast::<Element>(element) {
-                        if matches(selectors, &element, None, MatchingReason::Other) {
+                        if matches(&selectors.0, &element, None, MatchingReason::Other) {
                             return Ok(Some(element));
                         }
                     }

components/script/dom/node.rs

@@ -72,7 +72,6 @@ use script_layout_interface::message::Msg;
 use script_traits::UntrustedNodeAddress;
 use selectors::matching::{MatchingReason, matches};
 use selectors::parser::Selector;
-use selectors::parser::parse_author_origin_selector_list_from_str;
 use servo_url::ServoUrl;
 use std::borrow::ToOwned;
 use std::cell::{Cell, UnsafeCell};
@@ -83,7 +82,7 @@ use std::mem;
 use std::ops::Range;
 use std::sync::Arc;
 use style::dom::OpaqueNode;
-use style::selector_parser::ServoSelectorImpl;
+use style::selector_parser::{ServoSelectorImpl, SelectorParser};
 use style::stylesheets::Stylesheet;
 use style::thread_state;
 use uuid::Uuid;
@@ -690,13 +689,13 @@ impl Node {
     // https://dom.spec.whatwg.org/#dom-parentnode-queryselector
     pub fn query_selector(&self, selectors: DOMString) -> Fallible<Option<Root<Element>>> {
         // Step 1.
-        match parse_author_origin_selector_list_from_str(&selectors) {
+        match SelectorParser::parse_author_origin_no_namespace(&selectors) {
             // Step 2.
             Err(()) => Err(Error::Syntax),
             // Step 3.
-            Ok(ref selectors) => {
+            Ok(selectors) => {
                 Ok(self.traverse_preorder().filter_map(Root::downcast).find(|element| {
-                    matches(selectors, element, None, MatchingReason::Other)
+                    matches(&selectors.0, element, None, MatchingReason::Other)
                 }))
             }
         }
@@ -709,7 +708,7 @@ impl Node {
     pub fn query_selector_iter(&self, selectors: DOMString)
                                   -> Fallible<QuerySelectorIterator> {
         // Step 1.
-        match parse_author_origin_selector_list_from_str(&selectors) {
+        match SelectorParser::parse_author_origin_no_namespace(&selectors) {
             // Step 2.
             Err(()) => Err(Error::Syntax),
             // Step 3.
@@ -717,7 +716,7 @@ impl Node {
                 let mut descendants = self.traverse_preorder();
                 // Skip the root of the tree.
                 assert!(&*descendants.next().unwrap() == self);
-                Ok(QuerySelectorIterator::new(descendants, selectors))
+                Ok(QuerySelectorIterator::new(descendants, selectors.0))
             }
         }
     }

components/script_layout_interface/Cargo.toml

@@ -28,7 +28,7 @@ plugins = {path = "../plugins"}
 profile_traits = {path = "../profile_traits"}
 range = {path = "../range"}
 script_traits = {path = "../script_traits"}
-selectors = "0.14"
+selectors = "0.15"
 servo_atoms = {path = "../atoms"}
 servo_url = {path = "../url"}
 style = {path = "../style"}

components/style/Cargo.toml

@@ -44,7 +44,7 @@ quickersort = "2.0.0"
 rand = "0.3"
 rayon = "0.5"
 rustc-serialize = "0.3"
-selectors = "0.14"
+selectors = "0.15"
 serde = {version = "0.8", optional = true}
 serde_derive = {version = "0.8", optional = true}
 servo_atoms = {path = "../atoms", optional = true}

components/style/gecko/selector_parser.rs

@@ -4,14 +4,15 @@
 
 use cssparser::ToCss;
 use element_state::ElementState;
+use selector_parser::{SelectorParser, PseudoElementCascadeType};
 use selector_parser::{attr_equals_selector_is_shareable, attr_exists_selector_is_shareable};
-use selector_parser::PseudoElementCascadeType;
+use selectors::parser::AttrSelector;
-use selectors::parser::{AttrSelector, ParserContext, SelectorImpl};
+use std::borrow::Cow;
 use std::fmt;
 use string_cache::{Atom, Namespace, WeakAtom, WeakNamespace};
 
-#[derive(Debug, Clone, PartialEq, Eq)]
+// FIXME remove
-pub struct GeckoSelectorImpl;
+pub use self::SelectorImpl as GeckoSelectorImpl;
 
 /// NOTE: The boolean field represents whether this element is an anonymous box.
 ///
@@ -161,7 +162,10 @@ impl NonTSPseudoClass {
     }
 }
 
-impl SelectorImpl for GeckoSelectorImpl {
+#[derive(Clone, Debug, PartialEq)]
+pub struct SelectorImpl;
+
+impl ::selectors::SelectorImpl for SelectorImpl {
     type AttrValue = Atom;
     type Identifier = Atom;
     type ClassName = Atom;
@@ -182,11 +186,14 @@ impl SelectorImpl for GeckoSelectorImpl {
                                          value: &Self::AttrValue) -> bool {
         attr_equals_selector_is_shareable(attr_selector, value)
     }
+}
 
-    fn parse_non_ts_pseudo_class(_context: &ParserContext<Self>,
+impl<'a> ::selectors::Parser for SelectorParser<'a> {
-                                 name: &str) -> Result<NonTSPseudoClass, ()> {
+    type Impl = SelectorImpl;
+
+    fn parse_non_ts_pseudo_class(&self, name: Cow<str>) -> Result<NonTSPseudoClass, ()> {
         use self::NonTSPseudoClass::*;
-        let pseudo_class = match_ignore_ascii_case! { name,
+        let pseudo_class = match_ignore_ascii_case! { &name,
             "any-link" => AnyLink,
             "link" => Link,
             "visited" => Visited,
@@ -205,16 +212,23 @@ impl SelectorImpl for GeckoSelectorImpl {
         Ok(pseudo_class)
     }
 
-    fn parse_pseudo_element(context: &ParserContext<Self>,
+    fn parse_pseudo_element(&self, name: Cow<str>) -> Result<PseudoElement, ()> {
-                            name: &str) -> Result<PseudoElement, ()> {
+        match PseudoElement::from_slice(&name, self.in_user_agent_stylesheet()) {
-        match PseudoElement::from_slice(name, context.in_user_agent_stylesheet) {
             Some(pseudo) => Ok(pseudo),
             None => Err(()),
         }
     }
+
+    fn default_namespace(&self) -> Option<Namespace> {
+        self.namespaces.default.clone()
+    }
+
+    fn namespace_for_prefix(&self, prefix: &Atom) -> Option<Namespace> {
+        self.namespaces.prefixes.get(prefix).cloned()
+    }
 }
 
-impl GeckoSelectorImpl {
+impl SelectorImpl {
     #[inline]
     pub fn pseudo_element_cascade_type(pseudo: &PseudoElement) -> PseudoElementCascadeType {
         if Self::pseudo_is_before_or_after(pseudo) {

components/style/parser.rs

@@ -8,8 +8,6 @@ use cssparser::{Parser, SourcePosition};
 use error_reporting::ParseErrorReporter;
 #[cfg(feature = "gecko")]
 use gecko_bindings::sugar::refptr::{GeckoArcPrincipal, GeckoArcURI};
-use selector_parser::TheSelectorImpl;
-use selectors::parser::ParserContext as SelectorParserContext;
 use servo_url::ServoUrl;
 use stylesheets::Origin;
 
@@ -38,7 +36,6 @@ impl ParserContextExtraData {
 pub struct ParserContext<'a> {
     pub stylesheet_origin: Origin,
     pub base_url: &'a ServoUrl,
-    pub selector_context: SelectorParserContext<TheSelectorImpl>,
     pub error_reporter: Box<ParseErrorReporter + Send>,
     pub extra_data: ParserContextExtraData,
 }
@@ -48,12 +45,9 @@ impl<'a> ParserContext<'a> {
                                error_reporter: Box<ParseErrorReporter + Send>,
                                extra_data: ParserContextExtraData)
                                -> ParserContext<'a> {
-        let mut selector_context = SelectorParserContext::new();
-        selector_context.in_user_agent_stylesheet = stylesheet_origin == Origin::UserAgent;
         ParserContext {
             stylesheet_origin: stylesheet_origin,
             base_url: base_url,
-            selector_context: selector_context,
             error_reporter: error_reporter,
             extra_data: extra_data,
         }

components/style/selector_parser.rs

@@ -4,11 +4,17 @@
 
 //! The pseudo-classes and pseudo-elements supported by the style system.
 
+use cssparser::Parser as CssParser;
 use matching::{common_style_affecting_attributes, CommonStyleAffectingAttributeMode};
 use selectors::Element;
-use selectors::parser::{AttrSelector, SelectorImpl};
+use selectors::parser::{AttrSelector, SelectorList};
+use stylesheets::{Origin, Namespaces};
 
-pub type AttrValue = <TheSelectorImpl as SelectorImpl>::AttrValue;
+pub type AttrValue = <TheSelectorImpl as ::selectors::SelectorImpl>::AttrValue;
+
+// FIXME remove
+pub use self::SelectorImpl as TheSelectorImpl;
+pub use self::SelectorImpl as ServoSelectorImpl;
 
 #[cfg(feature = "servo")]
 pub use servo::selector_parser::*;
@@ -16,12 +22,6 @@ pub use servo::selector_parser::*;
 #[cfg(feature = "gecko")]
 pub use gecko::selector_parser::*;
 
-#[cfg(feature = "servo")]
-pub use servo::selector_parser::ServoSelectorImpl as TheSelectorImpl;
-
-#[cfg(feature = "gecko")]
-pub use gecko::selector_parser::GeckoSelectorImpl as TheSelectorImpl;
-
 #[cfg(feature = "servo")]
 pub use servo::selector_parser::ServoElementSnapshot as Snapshot;
 
@@ -34,6 +34,28 @@ pub use servo::restyle_damage::ServoRestyleDamage as RestyleDamage;
 #[cfg(feature = "gecko")]
 pub use gecko::restyle_damage::GeckoRestyleDamage as RestyleDamage;
 
+#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
+pub struct SelectorParser<'a> {
+    pub stylesheet_origin: Origin,
+    pub namespaces: &'a Namespaces,
+}
+
+impl<'a> SelectorParser<'a> {
+    pub fn parse_author_origin_no_namespace(input: &str)
+                                            -> Result<SelectorList<SelectorImpl>, ()> {
+        let namespaces = Namespaces::default();
+        let parser = SelectorParser {
+            stylesheet_origin: Origin::Author,
+            namespaces: &namespaces,
+        };
+        SelectorList::parse(&parser, &mut CssParser::new(input))
+    }
+
+    pub fn in_user_agent_stylesheet(&self) -> bool {
+        matches!(self.stylesheet_origin, Origin::UserAgent)
+    }
+}
+
 /// This function determines if a pseudo-element is eagerly cascaded or not.
 ///
 /// Eagerly cascaded pseudo-elements are "normal" pseudo-elements (i.e.
@@ -85,7 +107,7 @@ pub trait ElementExt: Element<Impl=TheSelectorImpl> {
     fn is_link(&self) -> bool;
 }
 
-impl TheSelectorImpl {
+impl SelectorImpl {
     #[inline]
     pub fn each_eagerly_cascaded_pseudo_element<F>(mut fun: F)
         where F: FnMut(PseudoElement)

components/style/servo/selector_parser.rs

@@ -7,10 +7,11 @@ use attr::{AttrIdentifier, AttrValue};
 use cssparser::ToCss;
 use element_state::ElementState;
 use restyle_hints::ElementSnapshot;
-use selector_parser::{ElementExt, PseudoElementCascadeType, TheSelectorImpl};
+use selector_parser::{ElementExt, PseudoElementCascadeType, SelectorParser};
 use selector_parser::{attr_equals_selector_is_shareable, attr_exists_selector_is_shareable};
 use selectors::{Element, MatchAttrGeneric};
-use selectors::parser::{AttrSelector, ParserContext, SelectorImpl};
+use selectors::parser::AttrSelector;
+use std::borrow::Cow;
 use std::fmt;
 
 /// NB: If you add to this list, be sure to update `each_pseudo_element` too.
@@ -150,9 +151,9 @@ impl NonTSPseudoClass {
 
 #[derive(Clone, Debug, PartialEq)]
 #[cfg_attr(feature = "servo", derive(HeapSizeOf))]
-pub struct ServoSelectorImpl;
+pub struct SelectorImpl;
 
-impl SelectorImpl for ServoSelectorImpl {
+impl ::selectors::SelectorImpl for SelectorImpl {
     type PseudoElement = PseudoElement;
     type NonTSPseudoClass = NonTSPseudoClass;
 
@@ -173,11 +174,14 @@ impl SelectorImpl for ServoSelectorImpl {
                                          value: &Self::AttrValue) -> bool {
         attr_equals_selector_is_shareable(attr_selector, value)
     }
+}
 
-    fn parse_non_ts_pseudo_class(context: &ParserContext<TheSelectorImpl>,
+impl<'a> ::selectors::Parser for SelectorParser<'a> {
-                                 name: &str) -> Result<NonTSPseudoClass, ()> {
+    type Impl = SelectorImpl;
+
+    fn parse_non_ts_pseudo_class(&self, name: Cow<str>) -> Result<NonTSPseudoClass, ()> {
         use self::NonTSPseudoClass::*;
-        let pseudo_class = match_ignore_ascii_case! { name,
+        let pseudo_class = match_ignore_ascii_case! { &name,
             "any-link" => AnyLink,
             "link" => Link,
             "visited" => Visited,
@@ -193,7 +197,7 @@ impl SelectorImpl for ServoSelectorImpl {
             "placeholder-shown" => PlaceholderShown,
             "target" => Target,
             "-servo-nonzero-border" => {
-                if !context.in_user_agent_stylesheet {
+                if !self.in_user_agent_stylesheet() {
                     return Err(());
                 }
                 ServoNonZeroBorder
@@ -204,63 +208,62 @@ impl SelectorImpl for ServoSelectorImpl {
         Ok(pseudo_class)
     }
 
-    fn parse_pseudo_element(context: &ParserContext<TheSelectorImpl>,
+    fn parse_pseudo_element(&self, name: Cow<str>) -> Result<PseudoElement, ()> {
-                            name: &str) -> Result<PseudoElement, ()> {
         use self::PseudoElement::*;
-        let pseudo_element = match_ignore_ascii_case! { name,
+        let pseudo_element = match_ignore_ascii_case! { &name,
             "before" => Before,
             "after" => After,
             "selection" => Selection,
             "-servo-details-summary" => {
-                if !context.in_user_agent_stylesheet {
+                if !self.in_user_agent_stylesheet() {
                     return Err(())
                 }
                 DetailsSummary
             },
             "-servo-details-content" => {
-                if !context.in_user_agent_stylesheet {
+                if !self.in_user_agent_stylesheet() {
                     return Err(())
                 }
                 DetailsContent
             },
             "-servo-input-text" => {
-                if !context.in_user_agent_stylesheet {
+                if !self.in_user_agent_stylesheet() {
                     return Err(())
                 }
                 ServoInputText
             },
             "-servo-table-wrapper" => {
-                if !context.in_user_agent_stylesheet {
+                if !self.in_user_agent_stylesheet() {
                     return Err(())
                 }
                 ServoTableWrapper
             },
             "-servo-anonymous-table-wrapper" => {
-                if !context.in_user_agent_stylesheet {
+                if !self.in_user_agent_stylesheet() {
                     return Err(())
                 }
                 ServoAnonymousTableWrapper
             },
             "-servo-anonymous-table" => {
-                if !context.in_user_agent_stylesheet {
+                if !self.in_user_agent_stylesheet() {
                     return Err(())
                 }
                 ServoAnonymousTable
             },
             "-servo-anonymous-table-row" => {
-                if !context.in_user_agent_stylesheet {
+                if !self.in_user_agent_stylesheet() {
                     return Err(())
                 }
                 ServoAnonymousTableRow
             },
             "-servo-anonymous-table-cell" => {
-                if !context.in_user_agent_stylesheet {
+                if !self.in_user_agent_stylesheet() {
                     return Err(())
                 }
                 ServoAnonymousTableCell
             },
             "-servo-anonymous-block" => {
-                if !context.in_user_agent_stylesheet {
+                if !self.in_user_agent_stylesheet() {
                     return Err(())
                 }
                 ServoAnonymousBlock
@@ -270,9 +273,17 @@ impl SelectorImpl for ServoSelectorImpl {
 
         Ok(pseudo_element)
     }
+
+    fn default_namespace(&self) -> Option<Namespace> {
+        self.namespaces.default.clone()
+    }
+
+    fn namespace_for_prefix(&self, prefix: &Prefix) -> Option<Namespace> {
+        self.namespaces.prefixes.get(prefix).cloned()
+    }
 }
 
-impl ServoSelectorImpl {
+impl SelectorImpl {
     #[inline]
     pub fn pseudo_element_cascade_type(pseudo: &PseudoElement) -> PseudoElementCascadeType {
         pseudo.cascade_type()
@@ -368,9 +379,9 @@ impl ElementSnapshot for ServoElementSnapshot {
 }
 
 impl MatchAttrGeneric for ServoElementSnapshot {
-    type Impl = ServoSelectorImpl;
+    type Impl = SelectorImpl;
 
-    fn match_attr<F>(&self, attr: &AttrSelector<ServoSelectorImpl>, test: F) -> bool
+    fn match_attr<F>(&self, attr: &AttrSelector<SelectorImpl>, test: F) -> bool
         where F: Fn(&str) -> bool
     {
         use selectors::parser::NamespaceConstraint;
@@ -383,7 +394,7 @@ impl MatchAttrGeneric for ServoElementSnapshot {
     }
 }
 
-impl<E: Element<Impl=TheSelectorImpl>> ElementExt for E {
+impl<E: Element<Impl=SelectorImpl>> ElementExt for E {
     fn is_link(&self) -> bool {
         self.match_non_ts_pseudo_class(NonTSPseudoClass::AnyLink)
     }

components/style/stylesheets.rs

@@ -16,14 +16,15 @@ use media_queries::{Device, MediaList, parse_media_query_list};
 use parking_lot::RwLock;
 use parser::{ParserContext, ParserContextExtraData, log_css_error};
 use properties::{PropertyDeclarationBlock, parse_property_declaration_list};
-use selector_parser::TheSelectorImpl;
+use selector_parser::{SelectorImpl, SelectorParser};
-use selectors::parser::{Selector, parse_selector_list};
+use selectors::parser::{Selector, SelectorList};
 use servo_url::ServoUrl;
 use std::cell::Cell;
 use std::fmt;
 use std::sync::Arc;
 use std::sync::atomic::{AtomicBool, Ordering};
 use style_traits::ToCss;
+use stylist::FnvHashMap;
 use viewport::ViewportRule;
 
 
@@ -43,6 +44,13 @@ pub enum Origin {
     User,
 }
 
+#[derive(Default)]
+#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
+pub struct Namespaces {
+    pub default: Option<Namespace>,
+    pub prefixes: FnvHashMap<Prefix , Namespace>,
+}
+
 #[derive(Debug, Clone)]
 pub struct CssRules(pub Arc<RwLock<Vec<CssRule>>>);
 
@@ -188,7 +196,7 @@ impl ToCss for MediaRule {
 
 #[derive(Debug)]
 pub struct StyleRule {
-    pub selectors: Vec<Selector<TheSelectorImpl>>,
+    pub selectors: Vec<Selector<SelectorImpl>>,
     pub block: Arc<RwLock<PropertyDeclarationBlock>>,
 }
 
@@ -246,7 +254,10 @@ impl Stylesheet {
     pub fn from_str(css: &str, base_url: ServoUrl, origin: Origin, media: MediaList,
                     error_reporter: Box<ParseErrorReporter + Send>,
                     extra_data: ParserContextExtraData) -> Stylesheet {
+        let mut namespaces = Namespaces::default();
         let rule_parser = TopLevelRuleParser {
+            stylesheet_origin: origin,
+            namespaces: &mut namespaces,
             context: ParserContext::new_with_extra_data(origin, &base_url, error_reporter.clone(),
                                                         extra_data),
             state: Cell::new(State::Start),
@@ -356,29 +367,23 @@ rule_filter! {
     effective_keyframes_rules(Keyframes => KeyframesRule),
 }
 
-fn parse_nested_rules(context: &ParserContext, input: &mut Parser) -> CssRules {
-    let mut iter = RuleListParser::new_for_nested_rule(input,
-                                                       NestedRuleParser { context: context });
-    let mut rules = Vec::new();
-    while let Some(result) = iter.next() {
-        match result {
-            Ok(rule) => rules.push(rule),
-            Err(range) => {
-                let pos = range.start;
-                let message = format!("Unsupported rule: '{}'", iter.input.slice(range));
-                log_css_error(iter.input, pos, &*message, &context);
-            }
-        }
-    }
-    rules.into()
-}
-
-
 struct TopLevelRuleParser<'a> {
+    stylesheet_origin: Origin,
+    namespaces: &'a mut Namespaces,
     context: ParserContext<'a>,
     state: Cell<State>,
 }
 
+impl<'b> TopLevelRuleParser<'b> {
+    fn nested<'a: 'b>(&'a self) -> NestedRuleParser<'a, 'b> {
+        NestedRuleParser {
+            stylesheet_origin: self.stylesheet_origin,
+            context: &self.context,
+            namespaces: self.namespaces,
+        }
+    }
+}
+
 #[derive(Eq, PartialEq, Ord, PartialOrd, Copy, Clone)]
 enum State {
     Start = 1,
@@ -425,11 +430,10 @@ impl<'a> AtRuleParser for TopLevelRuleParser<'a> {
 
                     let opt_prefix = if let Ok(prefix) = prefix_result {
                         let prefix = Prefix::from(prefix);
-                        self.context.selector_context.namespace_prefixes.insert(
+                        self.namespaces.prefixes.insert(prefix.clone(), url.clone());
-                            prefix.clone(), url.clone());
                         Some(prefix)
                     } else {
-                        self.context.selector_context.default_namespace = Some(url.clone());
+                        self.namespaces.default = Some(url.clone());
                         None
                     };
 
@@ -450,39 +454,57 @@ impl<'a> AtRuleParser for TopLevelRuleParser<'a> {
         }
 
         self.state.set(State::Body);
-        AtRuleParser::parse_prelude(&mut NestedRuleParser { context: &self.context }, name, input)
+        AtRuleParser::parse_prelude(&mut self.nested(), name, input)
     }
 
     #[inline]
     fn parse_block(&mut self, prelude: AtRulePrelude, input: &mut Parser) -> Result<CssRule, ()> {
-        AtRuleParser::parse_block(&mut NestedRuleParser { context: &self.context }, prelude, input)
+        AtRuleParser::parse_block(&mut self.nested(), prelude, input)
     }
 }
 
 
 impl<'a> QualifiedRuleParser for TopLevelRuleParser<'a> {
-    type Prelude = Vec<Selector<TheSelectorImpl>>;
+    type Prelude = SelectorList<SelectorImpl>;
     type QualifiedRule = CssRule;
 
     #[inline]
-    fn parse_prelude(&mut self, input: &mut Parser) -> Result<Vec<Selector<TheSelectorImpl>>, ()> {
+    fn parse_prelude(&mut self, input: &mut Parser) -> Result<SelectorList<SelectorImpl>, ()> {
         self.state.set(State::Body);
-        QualifiedRuleParser::parse_prelude(&mut NestedRuleParser { context: &self.context }, input)
+        QualifiedRuleParser::parse_prelude(&mut self.nested(), input)
     }
 
     #[inline]
-    fn parse_block(&mut self, prelude: Vec<Selector<TheSelectorImpl>>, input: &mut Parser)
+    fn parse_block(&mut self, prelude: SelectorList<SelectorImpl>, input: &mut Parser)
                    -> Result<CssRule, ()> {
-        QualifiedRuleParser::parse_block(&mut NestedRuleParser { context: &self.context },
+        QualifiedRuleParser::parse_block(&mut self.nested(), prelude, input)
-                                         prelude, input)
     }
 }
 
-
+#[derive(Clone)]  // shallow, relatively cheap clone
 struct NestedRuleParser<'a, 'b: 'a> {
+    stylesheet_origin: Origin,
     context: &'a ParserContext<'b>,
+    namespaces: &'b Namespaces,
 }
 
+impl<'a, 'b> NestedRuleParser<'a, 'b> {
+    fn parse_nested_rules(&self, input: &mut Parser) -> CssRules {
+        let mut iter = RuleListParser::new_for_nested_rule(input, self.clone());
+        let mut rules = Vec::new();
+        while let Some(result) = iter.next() {
+            match result {
+                Ok(rule) => rules.push(rule),
+                Err(range) => {
+                    let pos = range.start;
+                    let message = format!("Unsupported rule: '{}'", iter.input.slice(range));
+                    log_css_error(iter.input, pos, &*message, self.context);
+                }
+            }
+        }
+        rules.into()
+    }
+}
 
 impl<'a, 'b> AtRuleParser for NestedRuleParser<'a, 'b> {
     type Prelude = AtRulePrelude;
@@ -528,7 +550,7 @@ impl<'a, 'b> AtRuleParser for NestedRuleParser<'a, 'b> {
             AtRulePrelude::Media(media_queries) => {
                 Ok(CssRule::Media(Arc::new(RwLock::new(MediaRule {
                     media_queries: media_queries,
-                    rules: parse_nested_rules(self.context, input),
+                    rules: self.parse_nested_rules(input),
                 }))))
             }
             AtRulePrelude::Viewport => {
@@ -546,17 +568,21 @@ impl<'a, 'b> AtRuleParser for NestedRuleParser<'a, 'b> {
 }
 
 impl<'a, 'b> QualifiedRuleParser for NestedRuleParser<'a, 'b> {
-    type Prelude = Vec<Selector<TheSelectorImpl>>;
+    type Prelude = SelectorList<SelectorImpl>;
     type QualifiedRule = CssRule;
 
-    fn parse_prelude(&mut self, input: &mut Parser) -> Result<Vec<Selector<TheSelectorImpl>>, ()> {
+    fn parse_prelude(&mut self, input: &mut Parser) -> Result<SelectorList<SelectorImpl>, ()> {
-        parse_selector_list(&self.context.selector_context, input)
+        let selector_parser = SelectorParser {
+            stylesheet_origin: self.stylesheet_origin,
+            namespaces: self.namespaces,
+        };
+        SelectorList::parse(&selector_parser, input)
     }
 
-    fn parse_block(&mut self, prelude: Vec<Selector<TheSelectorImpl>>, input: &mut Parser)
+    fn parse_block(&mut self, prelude: SelectorList<SelectorImpl>, input: &mut Parser)
                    -> Result<CssRule, ()> {
         Ok(CssRule::Style(Arc::new(RwLock::new(StyleRule {
-            selectors: prelude,
+            selectors: prelude.0,
             block: Arc::new(RwLock::new(parse_property_declaration_list(self.context, input)))
         }))))
     }

ports/cef/Cargo.lock

@@ -1158,7 +1158,7 @@ dependencies = [
  "rayon 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "script_layout_interface 0.0.1",
  "script_traits 0.0.1",
- "selectors 0.14.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "selectors 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 0.8.17 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 0.8.17 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1198,7 +1198,7 @@ dependencies = [
  "script 0.0.1",
  "script_layout_interface 0.0.1",
  "script_traits 0.0.1",
- "selectors 0.14.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "selectors 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 0.8.17 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo_url 0.0.1",
@@ -2019,7 +2019,7 @@ dependencies = [
  "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "script_layout_interface 0.0.1",
  "script_traits 0.0.1",
- "selectors 0.14.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "selectors 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 0.8.17 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo_atoms 0.0.1",
  "servo_url 0.0.1",
@@ -2058,7 +2058,7 @@ dependencies = [
  "profile_traits 0.0.1",
  "range 0.0.1",
  "script_traits 0.0.1",
- "selectors 0.14.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "selectors 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo_atoms 0.0.1",
  "servo_url 0.0.1",
  "style 0.0.1",
@@ -2097,7 +2097,7 @@ dependencies = [
 
 [[package]]
 name = "selectors"
-version = "0.14.0"
+version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2374,7 +2374,7 @@ dependencies = [
  "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "rayon 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
- "selectors 0.14.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "selectors 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 0.8.17 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 0.8.17 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo_atoms 0.0.1",
@@ -3096,7 +3096,7 @@ dependencies = [
 "checksum rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)" = "6159e4e6e559c81bd706afe9c8fd68f547d3e851ce12e76b1de7914bab61691b"
 "checksum rustc_version 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "c5f5376ea5e30ce23c03eb77cbe4962b988deead10910c372b226388b594c084"
 "checksum scoped_threadpool 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "3ef399c8893e8cb7aa9696e895427fab3a6bf265977bb96e126f24ddd2cda85a"
-"checksum selectors 0.14.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a7f8d3498861f4486e7e1d5c56eabf2b0e461f92bcbf45a3ac30cae0f3d5cdd0"
+"checksum selectors 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)" = "75b127ac14249f6ce720277f6a163b3837706e9dc1ad4e2948db55f262f11a97"
 "checksum semver 0.1.20 (registry+https://github.com/rust-lang/crates.io-index)" = "d4f410fedcf71af0345d7607d246e7ad15faaadd49d240ee3b24e5dc21a820ac"
 "checksum serde 0.8.17 (registry+https://github.com/rust-lang/crates.io-index)" = "784e249221c84265caeb1e2fe48aeada86f67f5acb151bd3903c4585969e43f6"
 "checksum serde_codegen 0.8.17 (registry+https://github.com/rust-lang/crates.io-index)" = "c3b932a3bb4d729e39aa04cc5e2f2ac70ba239a5a151d2dc9a1956fd6a2f7c15"

ports/geckolib/Cargo.lock

@@ -11,7 +11,7 @@ dependencies = [
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "selectors 0.14.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "selectors 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo_url 0.0.1",
  "style 0.0.1",
  "style_traits 0.0.1",
@@ -319,7 +319,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "selectors"
-version = "0.14.0"
+version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -372,7 +372,7 @@ dependencies = [
  "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "rayon 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
- "selectors 0.14.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "selectors 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo_url 0.0.1",
  "smallvec 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "style_traits 0.0.1",
@@ -406,7 +406,7 @@ dependencies = [
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "selectors 0.14.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "selectors 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo_url 0.0.1",
  "style 0.0.1",
  "style_traits 0.0.1",
@@ -565,7 +565,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum regex 0.1.76 (registry+https://github.com/rust-lang/crates.io-index)" = "63b49f873f36ddc838d773972511e5fed2ef7350885af07d58e2f48ce8073dcd"
 "checksum regex-syntax 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)" = "279401017ae31cf4e15344aa3f085d0e2e5c1e70067289ef906906fdbe92c8fd"
 "checksum rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)" = "6159e4e6e559c81bd706afe9c8fd68f547d3e851ce12e76b1de7914bab61691b"
-"checksum selectors 0.14.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a7f8d3498861f4486e7e1d5c56eabf2b0e461f92bcbf45a3ac30cae0f3d5cdd0"
+"checksum selectors 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)" = "75b127ac14249f6ce720277f6a163b3837706e9dc1ad4e2948db55f262f11a97"
 "checksum serde 0.8.17 (registry+https://github.com/rust-lang/crates.io-index)" = "784e249221c84265caeb1e2fe48aeada86f67f5acb151bd3903c4585969e43f6"
 "checksum smallvec 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "fcc8d19212aacecf95e4a7a2179b26f7aeb9732a915cf01f05b0d3e044865410"
 "checksum thread-id 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a9539db560102d1cef46b8b78ce737ff0bb64e7e18d35b2a5688f7d097d0ff03"

ports/geckolib/Cargo.toml

@@ -19,7 +19,7 @@ libc = "0.2"
 log = {version = "0.3.5", features = ["release_max_level_info"]}
 num_cpus = "1.1.0"
 parking_lot = "0.3"
-selectors = "0.14"
+selectors = "0.15"
 servo_url = {path = "../../components/url"}
 style = {path = "../../components/style", features = ["gecko"]}
 style_traits = {path = "../../components/style_traits"}

ports/servo/Cargo.lock

@@ -1237,7 +1237,7 @@ dependencies = [
  "rayon 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "script_layout_interface 0.0.1",
  "script_traits 0.0.1",
- "selectors 0.14.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "selectors 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 0.8.17 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 0.8.17 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1284,7 +1284,7 @@ dependencies = [
  "script 0.0.1",
  "script_layout_interface 0.0.1",
  "script_traits 0.0.1",
- "selectors 0.14.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "selectors 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 0.8.17 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo_url 0.0.1",
@@ -2169,7 +2169,7 @@ dependencies = [
  "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "script_layout_interface 0.0.1",
  "script_traits 0.0.1",
- "selectors 0.14.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "selectors 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 0.8.17 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo_atoms 0.0.1",
  "servo_url 0.0.1",
@@ -2208,7 +2208,7 @@ dependencies = [
  "profile_traits 0.0.1",
  "range 0.0.1",
  "script_traits 0.0.1",
- "selectors 0.14.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "selectors 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo_atoms 0.0.1",
  "servo_url 0.0.1",
  "style 0.0.1",
@@ -2257,7 +2257,7 @@ dependencies = [
 
 [[package]]
 name = "selectors"
-version = "0.14.0"
+version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2541,7 +2541,7 @@ dependencies = [
  "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "rayon 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
- "selectors 0.14.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "selectors 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 0.8.17 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 0.8.17 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo_atoms 0.0.1",
@@ -2565,7 +2565,7 @@ dependencies = [
  "owning_ref 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
- "selectors 0.14.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "selectors 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo_atoms 0.0.1",
  "servo_url 0.0.1",
  "style 0.0.1",
@@ -3306,7 +3306,7 @@ dependencies = [
 "checksum rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)" = "6159e4e6e559c81bd706afe9c8fd68f547d3e851ce12e76b1de7914bab61691b"
 "checksum rustc_version 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "c5f5376ea5e30ce23c03eb77cbe4962b988deead10910c372b226388b594c084"
 "checksum scoped_threadpool 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "3ef399c8893e8cb7aa9696e895427fab3a6bf265977bb96e126f24ddd2cda85a"
-"checksum selectors 0.14.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a7f8d3498861f4486e7e1d5c56eabf2b0e461f92bcbf45a3ac30cae0f3d5cdd0"
+"checksum selectors 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)" = "75b127ac14249f6ce720277f6a163b3837706e9dc1ad4e2948db55f262f11a97"
 "checksum semver 0.1.20 (registry+https://github.com/rust-lang/crates.io-index)" = "d4f410fedcf71af0345d7607d246e7ad15faaadd49d240ee3b24e5dc21a820ac"
 "checksum semver 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2d5b7638a1f03815d94e88cb3b3c08e87f0db4d683ef499d1836aaf70a45623f"
 "checksum serde 0.8.17 (registry+https://github.com/rust-lang/crates.io-index)" = "784e249221c84265caeb1e2fe48aeada86f67f5acb151bd3903c4585969e43f6"

tests/unit/style/Cargo.toml

@@ -16,7 +16,7 @@ euclid = "0.10.1"
 owning_ref = "0.2.2"
 parking_lot = "0.3"
 rustc-serialize = "0.3"
-selectors = "0.14"
+selectors = "0.15"
 html5ever-atoms = "0.1"
 servo_atoms = {path = "../../../components/atoms"}
 style = {path = "../../../components/style"}

tests/unit/style/parsing/selectors.rs

@@ -3,14 +3,18 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 use cssparser::{Parser, ToCss};
-use selectors::parser::{Selector, ParserContext, parse_selector_list};
+use selectors::parser::SelectorList;
-use style::selector_parser::TheSelectorImpl;
+use style::selector_parser::{TheSelectorImpl, SelectorParser};
+use style::stylesheets::{Origin, Namespaces};
 
-fn parse(input: &mut Parser) -> Result<Selector<TheSelectorImpl>, ()> {
+fn parse(input: &mut Parser) -> Result<SelectorList<TheSelectorImpl>, ()> {
-    let mut context = ParserContext::new();
+    let mut ns = Namespaces::default();
-    context.in_user_agent_stylesheet = true;
+    ns.prefixes.insert("svg".into(), ns!(svg));
-    context.namespace_prefixes.insert("svg".into(), ns!(svg));
+    let parser = SelectorParser {
-    parse_selector_list(&context, input).map(|mut vec| vec.pop().unwrap())
+        stylesheet_origin: Origin::UserAgent,
+        namespaces: &ns,
+    };
+    SelectorList::parse(&parser, input)
 }
 
 #[test]

tests/unit/style/stylesheets.rs

@@ -2,7 +2,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-use cssparser::{self, Parser, SourcePosition};
+use cssparser::{self, Parser as CssParser, SourcePosition};
 use html5ever_atoms::{Namespace as NsAtom};
 use media_queries::CSSErrorReporterTest;
 use parking_lot::RwLock;
@@ -282,7 +282,7 @@ impl CSSInvalidErrorReporterTest {
 }
 
 impl ParseErrorReporter for CSSInvalidErrorReporterTest {
-    fn report_error(&self, input: &mut Parser, position: SourcePosition, message: &str) {
+    fn report_error(&self, input: &mut CssParser, position: SourcePosition, message: &str) {
         let location = input.source_location(position);
 
         let errors = self.errors.clone();

tests/unit/style/stylist.rs

@@ -5,11 +5,12 @@
 use cssparser::Parser;
 use html5ever_atoms::LocalName;
 use parking_lot::RwLock;
-use selectors::parser::{LocalName as LocalNameSelector, ParserContext, parse_selector_list};
+use selectors::parser::LocalName as LocalNameSelector;
 use servo_atoms::Atom;
 use std::sync::Arc;
 use style::properties::{PropertyDeclarationBlock, PropertyDeclaration, DeclaredValue};
 use style::properties::{longhands, Importance};
+use style::selector_parser::SelectorParser;
 use style::stylesheets::StyleRule;
 use style::stylist::{Rule, SelectorMap};
 use style::thread_state;
@@ -18,9 +19,7 @@ use style::thread_state;
 /// Each sublist of the result contains the Rules for one StyleRule.
 fn get_mock_rules(css_selectors: &[&str]) -> Vec<Vec<Rule>> {
     css_selectors.iter().enumerate().map(|(i, selectors)| {
-        let context = ParserContext::new();
+        let selectors = SelectorParser::parse_author_origin_no_namespace(selectors).unwrap().0;
-        let selectors =
-            parse_selector_list(&context, &mut Parser::new(*selectors)).unwrap();
 
         let rule = Arc::new(RwLock::new(StyleRule {
             selectors: selectors,

tests/unit/stylo/Cargo.toml

@@ -21,7 +21,7 @@ libc = "0.2"
 log = {version = "0.3.5", features = ["release_max_level_info"]}
 num_cpus = "1.1.0"
 parking_lot = "0.3"
-selectors = "0.14"
+selectors = "0.15"
 servo_url = {path = "../../../components/url"}
 style_traits = {path = "../../../components/style_traits"}
 geckoservo = {path = "../../../ports/geckolib"}