auto merge of #2558 : Ms2ger/servo/mod-unions, r=jdm

This will allow multiple unions to contain the same type.

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

@@ -555,7 +555,7 @@ def getJSToNativeConversionTemplate(type, descriptorProvider, failureCode=None,
             raise TypeError("Can't handle unions as members, we have a "
                             "holderType")
 
-        declType = CGGeneric(type.name)
+        declType = CGGeneric(type.name + "::" + type.name)
         if type.nullable():
             declType = CGWrapper(declType, pre="Option<", post=" >")
 
@@ -1657,6 +1657,20 @@ def UnionTypes(descriptors, dictionaries, callbacks, config):
     Returns a CGList containing CGUnionStructs for every union.
     """
 
+    imports = [
+        'dom::bindings::utils::unwrap_jsmanaged',
+        'dom::bindings::codegen::PrototypeList',
+        'dom::bindings::conversions::FromJSValConvertible',
+        'dom::bindings::conversions::ToJSValConvertible',
+        'dom::bindings::conversions::Default',
+        'dom::bindings::error::throw_not_in_union',
+        'dom::bindings::js::JS',
+        'dom::types::*',
+        'js::jsapi::JSContext',
+        'js::jsval::JSVal',
+        'servo_util::str::DOMString',
+    ]
+
     # Now find all the things we'll need as arguments and return values because
     # we need to wrap or unwrap them.
     unionStructs = dict()
@@ -1668,7 +1682,12 @@ def UnionTypes(descriptors, dictionaries, callbacks, config):
         name = str(t)
         if not name in unionStructs:
             provider = descriptor or config.getDescriptorProvider()
-            unionStructs[name] = CGList([CGUnionStruct(t, provider), CGUnionConversionStruct(t, provider)])
+            unionStructs[name] = CGNamespace(name,
+                CGImports(CGList([
+                    CGUnionStruct(t, provider),
+                    CGUnionConversionStruct(t, provider)
+                ]), [], imports),
+                public=True)
 
     return CGList(SortedDictValues(unionStructs), "\n\n")
 
@@ -4531,7 +4550,7 @@ class CGNativeMember(ClassMethod):
         if type.isUnion():
             if type.nullable():
                 type = type.inner
-            return str(type), False, True
+            return str(type) + "::" + str(type), False, True
 
         if type.isGeckoInterface() and not type.isCallbackInterface():
             iface = type.unroll().inner
@@ -5315,20 +5334,6 @@ class GlobalGenRoots():
                           config.getCallbacks(),
                           config)
 
-        curr = CGImports(curr, [], [
-            'dom::bindings::utils::unwrap_jsmanaged',
-            'dom::bindings::codegen::PrototypeList',
-            'dom::bindings::conversions::FromJSValConvertible',
-            'dom::bindings::conversions::ToJSValConvertible',
-            'dom::bindings::conversions::Default',
-            'dom::bindings::error::throw_not_in_union',
-            'dom::bindings::js::JS',
-            'dom::types::*',
-            'js::jsapi::JSContext',
-            'js::jsval::JSVal',
-            'servo_util::str::DOMString',
-        ])
-
         # Add the auto-generated comment.
         curr = CGWrapper(curr, pre=AUTOGENERATED_WARNING_COMMENT)
 

src/components/script/dom/htmlselectelement.rs

@@ -4,7 +4,8 @@
 
 use dom::bindings::codegen::Bindings::HTMLSelectElementBinding;
 use dom::bindings::codegen::InheritTypes::HTMLSelectElementDerived;
-use dom::bindings::codegen::UnionTypes::{HTMLElementOrLong, HTMLOptionElementOrHTMLOptGroupElement};
+use dom::bindings::codegen::UnionTypes::HTMLElementOrLong::HTMLElementOrLong;
+use dom::bindings::codegen::UnionTypes::HTMLOptionElementOrHTMLOptGroupElement::HTMLOptionElementOrHTMLOptGroupElement;
 use dom::bindings::js::{JSRef, Temporary};
 use dom::document::Document;
 use dom::element::HTMLSelectElementTypeId;

src/components/script/dom/testbinding.rs

@@ -5,7 +5,9 @@
 use dom::bindings::js::{JS, JSRef, Temporary};
 use dom::bindings::codegen::Bindings::TestBindingBinding::TestEnum;
 use dom::bindings::codegen::Bindings::TestBindingBinding::TestEnumValues::_empty;
-use dom::bindings::codegen::UnionTypes::{HTMLElementOrLong, EventOrString};
+use dom::bindings::codegen::UnionTypes::BlobOrString::BlobOrString;
+use dom::bindings::codegen::UnionTypes::EventOrString::EventOrString;
+use dom::bindings::codegen::UnionTypes::HTMLElementOrLong::HTMLElementOrLong;
 use dom::bindings::str::ByteString;
 use dom::bindings::utils::{Reflector, Reflectable};
 use dom::blob::Blob;
@@ -139,6 +141,7 @@ pub trait TestBindingMethods {
     fn PassInterface(&self, _: &JSRef<Blob>) {}
     fn PassUnion(&self, _: HTMLElementOrLong) {}
     fn PassUnion2(&self, _: EventOrString) {}
+    fn PassUnion3(&self, _: BlobOrString) {}
     fn PassAny(&self, _: *mut JSContext, _: JSVal) {}
 
     fn PassNullableBoolean(&self, _: Option<bool>) {}

src/components/script/dom/webidls/TestBinding.webidl

@@ -138,6 +138,7 @@ interface TestBinding {
   void passInterface(Blob arg);
   void passUnion((HTMLElement or long) arg);
   void passUnion2((Event or DOMString) data);
+  void passUnion3((Blob or DOMString) data);
   void passAny(any arg);
 
   void passNullableBoolean(boolean? arg);