style: Introduce TDocument::is_html_element and TDocument::quirks_mode.

This allows some code to read a bit nicer, and stop passing down quirks mode to
querySelector / querySelectorAll.

components/style/dom.rs

@@ -22,7 +22,7 @@ use properties::{AnimationRules, ComputedValues, PropertyDeclarationBlock};
 use rule_tree::CascadeLevel;
 use selector_parser::{AttrValue, PseudoClassStringArg, PseudoElement, SelectorImpl};
 use selectors::Element as SelectorsElement;
-use selectors::matching::{ElementSelectorFlags, VisitedHandlingMode};
+use selectors::matching::{ElementSelectorFlags, QuirksMode, VisitedHandlingMode};
 use selectors::sink::Push;
 use servo_arc::{Arc, ArcBorrow};
 use shared_lock::Locked;
@@ -140,6 +140,12 @@ pub trait TDocument : Sized + Copy + Clone {
 
     /// Get this document as a `TNode`.
     fn as_node(&self) -> Self::ConcreteNode;
+
+    /// Returns whether this document is an HTML document.
+    fn is_html_document(&self) -> bool;
+
+    /// Returns the quirks mode of this document.
+    fn quirks_mode(&self) -> QuirksMode;
 }
 
 /// The `TNode` trait. This is the main generic trait over which the style

components/style/dom_apis.rs

@@ -6,7 +6,7 @@
 //! and Gecko.
 
 use context::QuirksMode;
-use dom::{TElement, TNode};
+use dom::{TDocument, TElement, TNode};
 use invalidation::element::invalidator::{Invalidation, InvalidationProcessor, InvalidationVector};
 use selectors::{Element, NthIndexCache, SelectorList};
 use selectors::matching::{self, MatchingContext, MatchingMode};
@@ -308,7 +308,6 @@ pub fn query_selector<E, Q>(
     root: E::ConcreteNode,
     selector_list: &SelectorList<E::Impl>,
     results: &mut Q::Output,
-    quirks_mode: QuirksMode,
 )
 where
     E: TElement,
@@ -316,6 +315,7 @@ where
 {
     use invalidation::element::invalidator::TreeStyleInvalidator;
 
+    let quirks_mode = root.owner_doc().quirks_mode();
     let fast_result = query_selector_fast::<E, Q>(
         root,
         selector_list,

components/style/gecko/wrapper.rs

@@ -102,6 +102,14 @@ impl<'ld> TDocument for GeckoDocument<'ld> {
     fn as_node(&self) -> Self::ConcreteNode {
         GeckoNode(&self.0._base)
     }
+
+    fn is_html_document(&self) -> bool {
+        self.0.mType == structs::root::nsIDocument_Type::eHTML
+    }
+
+    fn quirks_mode(&self) -> QuirksMode {
+        self.0.mCompatMode.into()
+    }
 }
 
 /// A simple wrapper over a non-null Gecko node (`nsINode`) pointer.
@@ -172,12 +180,6 @@ impl<'ln> GeckoNode<'ln> {
         (self.0).mBoolFlags
     }
 
-    /// Owner document quirks mode getter.
-    #[inline]
-    pub fn owner_document_quirks_mode(&self) -> QuirksMode {
-        self.owner_doc().0.mCompatMode.into()
-    }
-
     #[inline]
     fn get_bool_flag(&self, flag: nsINode_BooleanFlag) -> bool {
         self.bool_flags() & (1u32 << flag as u32) != 0
@@ -665,12 +667,6 @@ impl<'le> GeckoElement<'le> {
         unsafe { Gecko_GetDocumentLWTheme(node.owner_doc().0) }
     }
 
-    /// Owner document quirks mode getter.
-    #[inline]
-    pub fn owner_document_quirks_mode(&self) -> QuirksMode {
-        self.as_node().owner_document_quirks_mode()
-    }
-
     /// Only safe to call on the main thread, with exclusive access to the element and
     /// its ancestors.
     /// This function is also called after display property changed for SMIL animation.
@@ -1614,7 +1610,7 @@ impl<'le> TElement for GeckoElement<'le> {
             if self.get_local_name().as_ptr() == atom!("th").as_ptr() {
                 hints.push(TH_RULE.clone());
             } else if self.get_local_name().as_ptr() == atom!("table").as_ptr() &&
-                      self.as_node().owner_doc().0.mCompatMode == structs::nsCompatibility::eCompatibility_NavQuirks {
+                      self.as_node().owner_doc().quirks_mode() == QuirksMode::Quirks {
                 hints.push(TABLE_COLOR_RULE.clone());
             }
         }
@@ -2061,7 +2057,7 @@ impl<'le> ::selectors::Element for GeckoElement<'le> {
 
     fn is_html_element_in_html_document(&self) -> bool {
         self.is_html_element() &&
-        self.as_node().owner_doc().0.mType == structs::root::nsIDocument_Type::eHTML
+        self.as_node().owner_doc().is_html_document()
     }
 
     fn ignores_nth_child_selectors(&self) -> bool {