stylo: Support marker shorthand; update boxing

MozReview-Commit-ID: 7B6h4IDZD67

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

@@ -72,7 +72,6 @@ ${helpers.predefined_type(
     products="gecko",
     animatable=True,
     needs_context=False,
-    boxed=True,
     spec="https://www.w3.org/TR/SVG2/painting.html#StrokeWidth")}
 
 ${helpers.single_keyword("stroke-linecap", "butt round square",
@@ -107,7 +106,6 @@ ${helpers.predefined_type(
     "parse_numbers_are_pixels",
     products="gecko",
     animatable=True,
-    boxed=True,
     needs_context=False,
     spec="https://www.w3.org/TR/SVG2/painting.html#StrokeDashing")}
 
@@ -122,20 +120,17 @@ ${helpers.single_keyword("clip-rule", "nonzero evenodd",
 ${helpers.predefined_type("marker-start", "UrlOrNone", "Either::Second(None_)",
                           products="gecko",
                           animatable="False",
-                          spec="https://www.w3.org/TR/SVG2/painting.html#VertexMarkerProperties",
-                          boxed=True)}
+                          spec="https://www.w3.org/TR/SVG2/painting.html#VertexMarkerProperties")}
 
 ${helpers.predefined_type("marker-mid", "UrlOrNone", "Either::Second(None_)",
                           products="gecko",
                           animatable="False",
-                          spec="https://www.w3.org/TR/SVG2/painting.html#VertexMarkerProperties",
-                          boxed=True)}
+                          spec="https://www.w3.org/TR/SVG2/painting.html#VertexMarkerProperties")}
 
 ${helpers.predefined_type("marker-end", "UrlOrNone", "Either::Second(None_)",
                           products="gecko",
                           animatable="False",
-                          spec="https://www.w3.org/TR/SVG2/painting.html#VertexMarkerProperties",
-                          boxed=True)}
+                          spec="https://www.w3.org/TR/SVG2/painting.html#VertexMarkerProperties")}
 
 <%helpers:longhand name="paint-order"
                    animatable="False"
@@ -171,12 +166,17 @@ ${helpers.predefined_type("marker-end", "UrlOrNone", "Either::Second(None_)",
     /// Higher priority values, i.e. the values specified first,
     /// will be painted first (and may be covered by paintings of lower priority)
     #[derive(PartialEq, Clone, Copy, Debug)]
+    #[cfg_attr(feature = "servo", derive(HeapSizeOf))]
     pub struct SpecifiedValue(pub u8);
 
     pub mod computed_value {
         pub use super::SpecifiedValue as T;
     }
 
+    pub fn get_initial_value() -> SpecifiedValue {
+      SpecifiedValue(NORMAL)
+    }
+
     impl SpecifiedValue {
         pub fn bits_at(&self, pos: u8) -> u8 {
             (self.0 >> pos * SHIFT) & MASK

components/style/properties/shorthand/inherited_svg.mako.rs

@@ -0,0 +1,36 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * 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/. */
+
+<%namespace name="helpers" file="/helpers.mako.rs" />
+
+<%helpers:shorthand name="marker" products="gecko"
+    sub_properties="marker-start marker-end marker-mid"
+    spec="https://www.w3.org/TR/SVG2/painting.html#MarkerShorthand">
+    use values::specified::UrlOrNone;
+
+    pub fn parse_value(context: &ParserContext, input: &mut Parser) -> Result<Longhands, ()> {
+        let url = UrlOrNone::parse(context, input)?;
+
+        Ok(Longhands {
+            marker_start: url.clone(),
+            marker_mid: url.clone(),
+            marker_end: url,
+        })
+    }
+
+    impl<'a> LonghandsToSerialize<'a>  {
+        fn to_css_declared<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
+            if let DeclaredValue::Value(ref start) = *self.marker_start {
+                if let DeclaredValue::Value(ref mid) = *self.marker_mid {
+                    if let DeclaredValue::Value(ref end) = *self.marker_end {
+                        if start == mid && mid == end {
+                            start.to_css(dest)?;
+                        }
+                    }
+                }
+            }
+            Ok(())
+        }
+    }
+</%helpers:shorthand>