Auto merge of #11086 - heycam:radius, r=bholley

Support border/outline-radius properties in geckolib.

<s>Because of the way Gecko stores outline-width in nsStyleOutline::mOutlineWidth (i.e., as its specified value for keywords) we need separate property implementations for servo/gecko products.</s>

The -moz-outline-radius parsing is a bit of a hack; I was just avoiding the effort of factoring out the parsing into a separate method. Let me know if I should do that.

<s>Gecko-side changes are https://bugzilla.mozilla.org/show_bug.cgi?id=1271168.</s>

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components/style/properties/data.py

@@ -145,7 +145,11 @@ class PropertiesData(object):
 
         return longand
 
-    def declare_shorthand(self, name, sub_properties, *args, **kwargs):
+    def declare_shorthand(self, name, sub_properties, products="gecko servo", *args, **kwargs):
+        products = products.split()
+        if self.product not in products:
+            return
+
         sub_properties = [self.longhands_by_name[s] for s in sub_properties]
         shorthand = Shorthand(name, sub_properties, *args, **kwargs)
         self.shorthands.append(shorthand)

components/style/properties/helpers.mako.rs

@@ -191,10 +191,12 @@
     </%call>
 </%def>
 
-<%def name="shorthand(name, sub_properties, experimental=False)">
+<%def name="shorthand(name, sub_properties, experimental=False, **kwargs)">
 <%
-    shorthand = data.declare_shorthand(name, sub_properties.split(), experimental=experimental)
+    shorthand = data.declare_shorthand(name, sub_properties.split(), experimental=experimental,
+                                       **kwargs)
 %>
+    % if shorthand:
     pub mod ${shorthand.ident} {
         use cssparser::Parser;
         use parser::ParserContext;
@@ -252,6 +254,7 @@
             ${caller.body()}
         }
     }
+    % endif
 </%def>
 
 <%def name="four_sides_shorthand(name, sub_property_pattern, parser_function)">

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

@@ -58,4 +58,11 @@ ${helpers.predefined_type("outline-color", "CSSColor", "::cssparser::Color::Curr
     }
 </%helpers:longhand>
 
+// The -moz-outline-radius-* properties are non-standard and not on a standards track.
+% for corner in ["topleft", "topright", "bottomright", "bottomleft"]:
+    ${helpers.predefined_type("-moz-outline-radius-" + corner, "BorderRadiusSize",
+                              "computed::BorderRadiusSize::zero()",
+                              "parse", products="gecko")}
+% endfor
+
 ${helpers.predefined_type("outline-offset", "Length", "Au(0)")}

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

@@ -47,3 +47,20 @@
         Err(())
     }
 </%helpers:shorthand>
+
+// The -moz-outline-radius shorthand is non-standard and not on a standards track.
+<%helpers:shorthand name="-moz-outline-radius" sub_properties="${' '.join(
+    '-moz-outline-radius-%s' % corner
+    for corner in ['topleft', 'topright', 'bottomright', 'bottomleft']
+)}" products="gecko">
+    use properties::shorthands;
+
+    // Re-use border-radius parsing.
+    shorthands::border_radius::parse_value(context, input).map(|longhands| {
+        Longhands {
+            % for corner in ["top_left", "top_right", "bottom_right", "bottom_left"]:
+            _moz_outline_radius_${corner.replace("_", "")}: longhands.border_${corner}_radius,
+            % endfor
+        }
+    })
+</%helpers:shorthand>