Store rootable dictionary members of dictionaries in RootedTraceableBox.

components/script/dom/bindings/codegen/CodegenRust.py

@@ -1096,9 +1096,8 @@ def getJSToNativeConversionInfo(type, descriptorProvider, failureCode=None,
         declType = CGGeneric(typeName)
         empty = "%s::empty(cx)" % typeName
 
-        if isMember != "Dictionary" and type_needs_tracing(type):
+        if type_needs_tracing(type):
             declType = CGTemplatedType("RootedTraceableBox", declType)
-            empty = "RootedTraceableBox::new(%s)" % empty
 
         template = ("match FromJSValConvertible::from_jsval(cx, ${val}, ()) {\n"
                     "    Ok(ConversionResult::Success(dictionary)) => dictionary,\n"
@@ -6094,16 +6093,24 @@ class CGDictionary(CGThing):
         memberInits = CGList([memberInit(m) for m in self.memberInfo])
         memberInserts = CGList([memberInsert(m) for m in self.memberInfo])
 
+        actualType = self.makeClassName(d)
+        preInitial = ""
+        postInitial = ""
+        if self.membersNeedTracing():
+            actualType = "RootedTraceableBox<%s>" % actualType
+            preInitial = "RootedTraceableBox::new("
+            postInitial = ")"
+
         return string.Template(
             "impl ${selfName} {\n"
-            "    pub unsafe fn empty(cx: *mut JSContext) -> ${selfName} {\n"
+            "    pub unsafe fn empty(cx: *mut JSContext) -> ${actualType} {\n"
             "        match ${selfName}::new(cx, HandleValue::null()) {\n"
             "            Ok(ConversionResult::Success(v)) => v,\n"
             "            _ => unreachable!(),\n"
             "        }\n"
             "    }\n"
             "    pub unsafe fn new(cx: *mut JSContext, val: HandleValue) \n"
-            "                      -> Result<ConversionResult<${selfName}>, ()> {\n"
+            "                      -> Result<ConversionResult<${actualType}>, ()> {\n"
             "        let object = if val.get().is_null_or_undefined() {\n"
             "            ptr::null_mut()\n"
             "        } else if val.get().is_object() {\n"
@@ -6113,17 +6120,18 @@ class CGDictionary(CGThing):
             "            return Err(());\n"
             "        };\n"
             "        rooted!(in(cx) let object = object);\n"
-            "        Ok(ConversionResult::Success(${selfName} {\n"
+            "        let dictionary = ${preInitial}${selfName} {\n"
             "${initParent}"
             "${initMembers}"
-            "        }))\n"
+            "        }${postInitial};\n"
+            "        Ok(ConversionResult::Success(dictionary))\n"
             "    }\n"
             "}\n"
             "\n"
-            "impl FromJSValConvertible for ${selfName} {\n"
+            "impl FromJSValConvertible for ${actualType} {\n"
             "    type Config = ();\n"
             "    unsafe fn from_jsval(cx: *mut JSContext, value: HandleValue, _option: ())\n"
-            "                         -> Result<ConversionResult<${selfName}>, ()> {\n"
+            "                         -> Result<ConversionResult<${actualType}>, ()> {\n"
             "        ${selfName}::new(cx, value)\n"
             "    }\n"
             "}\n"
@@ -6136,9 +6144,12 @@ class CGDictionary(CGThing):
             "    }\n"
             "}\n").substitute({
                 "selfName": self.makeClassName(d),
+                "actualType": actualType,
                 "initParent": CGIndenter(CGGeneric(initParent), indentLevel=12).define(),
                 "initMembers": CGIndenter(memberInits, indentLevel=12).define(),
                 "insertMembers": CGIndenter(memberInserts, indentLevel=8).define(),
+                "preInitial": CGGeneric(preInitial).define(),
+                "postInitial": CGGeneric(postInitial).define(),
             })
 
     def membersNeedTracing(self):

components/script/dom/bindings/conversions.rs

@@ -116,19 +116,11 @@ impl <T: DomObject + IDLInterface> FromJSValConvertible for Root<T> {
     }
 }
 
-impl <T: FromJSValConvertible + JSTraceable> FromJSValConvertible for RootedTraceableBox<T> {
-    type Config = T::Config;
-
-    unsafe fn from_jsval(cx: *mut JSContext,
-                         value: HandleValue,
-                         config: Self::Config)
-                         -> Result<ConversionResult<Self>, ()> {
-        T::from_jsval(cx, value, config).map(|result| {
-            match result {
-                ConversionResult::Success(v) => ConversionResult::Success(RootedTraceableBox::new(v)),
-                ConversionResult::Failure(e) => ConversionResult::Failure(e),
-            }
-        })
+impl<T: ToJSValConvertible + JSTraceable> ToJSValConvertible for RootedTraceableBox<T> {
+    #[inline]
+    unsafe fn to_jsval(&self, cx: *mut JSContext, rval: MutableHandleValue) {
+        let value = &**self;
+        value.to_jsval(cx, rval);
     }
 }
 

components/script/dom/bindings/iterable.rs

@@ -12,7 +12,7 @@ use dom::bindings::codegen::Bindings::IterableIteratorBinding::IterableKeyOrValu
 use dom::bindings::error::Fallible;
 use dom::bindings::js::{JS, Root};
 use dom::bindings::reflector::{DomObject, Reflector, reflect_dom_object};
-use dom::bindings::trace::{JSTraceable, RootedTraceableBox};
+use dom::bindings::trace::JSTraceable;
 use dom::globalscope::GlobalScope;
 use dom_struct::dom_struct;
 use js::conversions::ToJSValConvertible;
@@ -115,7 +115,7 @@ fn dict_return(cx: *mut JSContext,
                result: MutableHandleObject,
                done: bool,
                value: HandleValue) -> Fallible<()> {
-    let mut dict = RootedTraceableBox::new(unsafe { IterableKeyOrValueResult::empty(cx) });
+    let mut dict = unsafe { IterableKeyOrValueResult::empty(cx) };
     dict.done = done;
     dict.value.set(value.get());
     rooted!(in(cx) let mut dict_value = UndefinedValue());
@@ -130,7 +130,7 @@ fn key_and_value_return(cx: *mut JSContext,
                         result: MutableHandleObject,
                         key: HandleValue,
                         value: HandleValue) -> Fallible<()> {
-    let mut dict = RootedTraceableBox::new(unsafe { IterableKeyAndValueResult::empty(cx) });
+    let mut dict = unsafe { IterableKeyAndValueResult::empty(cx) };
     dict.done = false;
     dict.value = Some(vec![Heap::new(key.get()), Heap::new(value.get())]);
     rooted!(in(cx) let mut dict_value = UndefinedValue());

components/script/dom/testbinding.rs

@@ -343,7 +343,7 @@ impl TestBindingMethods for TestBinding {
             anyValue: Heap::new(NullValue()),
             booleanValue: None,
             byteValue: None,
-            dict: TestDictionaryDefaults {
+            dict: RootedTraceableBox::new(TestDictionaryDefaults {
                 UnrestrictedDoubleValue: 0.0,
                 anyValue: Heap::new(NullValue()),
                 booleanValue: false,
@@ -379,7 +379,7 @@ impl TestBindingMethods for TestBinding {
                 unsignedLongValue: 0,
                 unsignedShortValue: 0,
                 usvstringValue: USVString("".to_owned()),
-            },
+            }),
             doubleValue: None,
             enumValue: None,
             floatValue: None,