Add css::compute, for computing styles from Node + SelectResult

src/servo/css/compute.rs

@@ -0,0 +1,16 @@
+/*!
+Calculate styles for nodes based on SelectResults
+*/
+
+use dom::node::Node;
+use newcss::color::{Color, rgba};
+
+pub trait ComputeStyles {
+    fn compute_background_color() -> Color;
+}
+
+impl Node: ComputeStyles {
+    fn compute_background_color() -> Color {
+        rgba(255, 0, 255, 1.0)
+    }
+}

src/servo/layout/box.rs

@@ -9,6 +9,7 @@ use core::dvec::DVec;
 use core::to_str::ToStr;
 use core::rand;
 use css::styles::SpecifiedStyle;
+use css::compute::ComputeStyles;
 use newcss::values::{BoxSizing, Length, Px, CSSDisplay, Specified, BgColor, BgColorTransparent};
 use newcss::values::{BdrColor, PosAbsolute};
 use newcss::color::{Color, rgba};
@@ -428,13 +429,7 @@ impl RenderBox : RenderBoxMethods {
 
     fn add_bgcolor_to_list(list: &mut DisplayList, abs_bounds: &Rect<Au>) {
         use std::cmp::FuzzyEq;
-        // FIXME
+        let bgcolor = self.d().node.compute_background_color();
-        /*let boxed_bgcolor = self.d().node.style().background_color;
-        let bgcolor = match boxed_bgcolor {
-            Specified(BgColor(c)) => c,
-            Specified(BgColorTransparent) | _ => rgba(0,0,0,0.0)
-        };*/
-        let bgcolor = rgba(0,0,0,0.0);
         if !bgcolor.alpha.fuzzy_eq(&0.0) {
             list.append_item(~DisplayItem::new_SolidColor(abs_bounds, bgcolor.red, bgcolor.green, bgcolor.blue));
         }

src/servo/servo.rc

@@ -49,6 +49,7 @@ pub mod css {
     mod apply;
     mod matching;
     priv mod select_handler;
+    pub mod compute;
 }
 
 pub mod layout {