stylo: Add support for <table> color quirk

MozReview-Commit-ID: 56IKARwfbhw

components/style/gecko/wrapper.rs

@@ -624,12 +624,23 @@ impl<'le> PresentationalHintsSynthetizer for GeckoElement<'le> {
     fn synthesize_presentational_hints_for_legacy_attributes<V>(&self, hints: &mut V)
         where V: Push<ApplicableDeclarationBlock>,
     {
-        use properties::longhands::text_align::SpecifiedValue;
+        use properties::longhands::text_align::SpecifiedValue as SpecifiedTextAlign;
+        use properties::longhands::color::SpecifiedValue as SpecifiedColor;
+        use values::specified::color::Color;
         lazy_static! {
             static ref TH_RULE: ApplicableDeclarationBlock = {
                 let global_style_data = &*GLOBAL_STYLE_DATA;
                 let pdb = PropertyDeclarationBlock::with_one(
-                    PropertyDeclaration::TextAlign(SpecifiedValue::MozCenterOrInherit),
+                    PropertyDeclaration::TextAlign(SpecifiedTextAlign::MozCenterOrInherit),
+                    Importance::Normal
+                );
+                let arc = Arc::new(global_style_data.shared_lock.wrap(pdb));
+                ApplicableDeclarationBlock::from_declarations(arc, ServoCascadeLevel::PresHints)
+            };
+            static ref TABLE_COLOR_RULE: ApplicableDeclarationBlock = {
+                let global_style_data = &*GLOBAL_STYLE_DATA;
+                let pdb = PropertyDeclarationBlock::with_one(
+                    PropertyDeclaration::Color(SpecifiedColor(Color::InheritFromBodyQuirk.into())),
                     Importance::Normal
                 );
                 let arc = Arc::new(global_style_data.shared_lock.wrap(pdb));
@@ -638,9 +649,13 @@ impl<'le> PresentationalHintsSynthetizer for GeckoElement<'le> {
         };
 
         // <th> elements get a default MozCenterOrInherit which may get overridden
-        if self.get_namespace() == &*Namespace(atom!("http://www.w3.org/1999/xhtml")) &&
-          self.get_local_name().as_ptr() == atom!("th").as_ptr() {
-            hints.push(TH_RULE.clone());
+        if self.get_namespace() == &*Namespace(atom!("http://www.w3.org/1999/xhtml")) {
+            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().mCompatMode == structs::nsCompatibility::eCompatibility_NavQuirks {
+                hints.push(TABLE_COLOR_RULE.clone());
+            }
         }
         let declarations = unsafe { Gecko_GetHTMLPresentationAttrDeclarationBlock(self.0) };
         let declarations = declarations.and_then(|s| s.as_arc_opt());

components/style/gecko_bindings/bindings.rs

@@ -1050,6 +1050,10 @@ extern "C" {
 extern "C" {
     pub fn Gecko_CSSFontFaceRule_Release(aPtr: *mut nsCSSFontFaceRule);
 }
+extern "C" {
+    pub fn Gecko_GetBody(pres_context: RawGeckoPresContextBorrowed)
+     -> RawGeckoElementBorrowedOrNull;
+}
 extern "C" {
     pub fn Gecko_GetLookAndFeelSystemColor(color_id: i32,
                                            pres_context:

components/style/properties/longhand/color.mako.rs

@@ -26,10 +26,7 @@
 
         #[inline]
         fn from_computed_value(computed: &computed_value::T) -> Self {
-            SpecifiedValue(CSSColor {
-                parsed: Color::RGBA(*computed),
-                authored: None,
-            })
+            SpecifiedValue(Color::RGBA(*computed).into())
         }
     }
 

components/style/values/computed/mod.rs

@@ -209,6 +209,24 @@ impl ToComputedValue for specified::Color {
             specified::Color::MozHyperlinktext => to_rgba(pres_context.mLinkColor),
             specified::Color::MozActiveHyperlinktext => to_rgba(pres_context.mActiveLinkColor),
             specified::Color::MozVisitedHyperlinktext => to_rgba(pres_context.mVisitedLinkColor),
+            specified::Color::InheritFromBodyQuirk => {
+                use dom::TElement;
+                use gecko_bindings::bindings::Gecko_GetBody;
+                use gecko::wrapper::GeckoElement;
+                let body = unsafe {
+                    Gecko_GetBody(pres_context)
+                };
+                if let Some(body) = body {
+                    let wrap = GeckoElement(body);
+                    let borrow = wrap.borrow_data();
+                    borrow.as_ref().unwrap()
+                          .styles().primary.values()
+                          .get_color()
+                          .clone_color()
+                } else {
+                    to_rgba(pres_context.mDefaultColor)
+                }
+            },
         }
     }
 
@@ -239,13 +257,10 @@ impl ToComputedValue for specified::CSSColor {
 
     #[inline]
     fn from_computed_value(computed: &CSSColor) -> Self {
-        specified::CSSColor {
-            parsed: match *computed {
-                CSSColor::RGBA(rgba) => specified::Color::RGBA(rgba),
-                CSSColor::CurrentColor => specified::Color::CurrentColor,
-            },
-            authored: None,
-        }
+        (match *computed {
+            CSSColor::RGBA(rgba) => specified::Color::RGBA(rgba),
+            CSSColor::CurrentColor => specified::Color::CurrentColor,
+        }).into()
     }
 }
 

components/style/values/specified/color.rs

@@ -48,6 +48,8 @@ mod gecko {
         MozActiveHyperlinktext,
         /// -moz-visitedhyperlinktext
         MozVisitedHyperlinktext,
+        /// Quirksmode-only rule for inheriting color from the body
+        InheritFromBodyQuirk,
     }
 
     no_viewport_percentage!(Color);
@@ -89,6 +91,7 @@ mod gecko {
                 Color::MozHyperlinktext => dest.write_str("-moz-hyperlinktext"),
                 Color::MozActiveHyperlinktext => dest.write_str("-moz-activehyperlinktext"),
                 Color::MozVisitedHyperlinktext => dest.write_str("-moz-visitedhyperlinktext"),
+                Color::InheritFromBodyQuirk => Ok(()),
             }
         }
     }

components/style/values/specified/mod.rs

@@ -107,24 +107,27 @@ impl ToCss for CSSColor {
     }
 }
 
+impl From<Color> for CSSColor {
+    fn from(color: Color) -> Self {
+        CSSColor {
+            parsed: color,
+            authored: None,
+        }
+    }
+}
+
 impl CSSColor {
     #[inline]
     /// Returns currentcolor value.
     pub fn currentcolor() -> CSSColor {
-        CSSColor {
-            parsed: Color::CurrentColor,
-            authored: None,
-        }
+        Color::CurrentColor.into()
     }
 
     #[inline]
     /// Returns transparent value.
     pub fn transparent() -> CSSColor {
-        CSSColor {
-            parsed: Color::RGBA(cssparser::RGBA::transparent()),
-            // This should probably be "transparent", but maybe it doesn't matter.
-            authored: None,
-        }
+        // We should probably set authored to "transparent", but maybe it doesn't matter.
+        Color::RGBA(cssparser::RGBA::transparent()).into()
     }
 }