Auto merge of #9676 - nox:domexception, r=KiChjang

Support [ExceptionClass]

Use it on DOMException.

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2 files changed, 13 insertions, 11 deletions

diff --git a/components/script/dom/bindings/codegen/CodegenRust.py b/components/script/dom/bindings/codegen/CodegenRust.py
index 13b65f53f29..ea16360841d 100644
--- a/components/script/dom/bindings/codegen/CodegenRust.py
+++ b/components/script/dom/bindings/codegen/CodegenRust.py
@@ -2391,9 +2391,11 @@ class CGCreateInterfaceObjectsMethod(CGAbstractMethod):
             return CGGeneric("""\
 create_callback_interface_object(cx, receiver, sConstants, %s);""" % str_to_const_array(name))
 
-        protoChain = self.descriptor.prototypeChain
-        if len(protoChain) == 1:
-            getPrototypeProto = "prototype_proto.ptr = JS_GetObjectPrototype(cx, global)"
+        if len(self.descriptor.prototypeChain) == 1:
+            if self.descriptor.interface.getExtendedAttribute("ExceptionClass"):
+                getPrototypeProto = "prototype_proto.ptr = JS_GetErrorPrototype(cx)"
+            else:
+                getPrototypeProto = "prototype_proto.ptr = JS_GetObjectPrototype(cx, global)"
         else:
             getPrototypeProto = ("%s::GetProtoObject(cx, global, receiver, prototype_proto.handle_mut())" %
                                  toBindingNamespace(self.descriptor.prototypeChain[-2]))
@@ -5340,10 +5342,10 @@ class CGBindingRoot(CGThing):
             'js::jsapi::{HandleId, HandleObject, HandleValue, HandleValueArray}',
             'js::jsapi::{INTERNED_STRING_TO_JSID, IsCallable, JS_CallFunctionValue}',
             'js::jsapi::{JS_ComputeThis, JS_CopyPropertiesFrom, JS_ForwardGetPropertyTo}',
-            'js::jsapi::{JS_GetClass, JS_GetFunctionPrototype, JS_GetGlobalForObject}',
-            'js::jsapi::{JS_GetObjectPrototype, JS_GetProperty, JS_GetPropertyById}',
-            'js::jsapi::{JS_GetPropertyDescriptorById, JS_GetReservedSlot, JS_HasProperty}',
-            'js::jsapi::{JS_HasPropertyById, JS_InitializePropertiesFromCompatibleNativeObject}',
+            'js::jsapi::{JS_GetClass, JS_GetErrorPrototype, JS_GetFunctionPrototype}',
+            'js::jsapi::{JS_GetGlobalForObject, JS_GetObjectPrototype, JS_GetProperty}',
+            'js::jsapi::{JS_GetPropertyById, JS_GetPropertyDescriptorById, JS_GetReservedSlot}',
+            'js::jsapi::{JS_HasProperty, JS_HasPropertyById, JS_InitializePropertiesFromCompatibleNativeObject}',
             'js::jsapi::{JS_InternString, JS_IsExceptionPending, JS_NewObject, JS_NewObjectWithGivenProto}',
             'js::jsapi::{JS_NewObjectWithoutMetadata, JS_NewStringCopyZ, JS_SetProperty}',
             'js::jsapi::{JS_SetPrototype, JS_SetReservedSlot, JS_WrapValue, JSAutoCompartment}',
diff --git a/components/script/dom/webidls/DOMException.webidl b/components/script/dom/webidls/DOMException.webidl
index 0dfb7149e93..4e1620aa13b 100644
--- a/components/script/dom/webidls/DOMException.webidl
+++ b/components/script/dom/webidls/DOMException.webidl
@@ -3,12 +3,12 @@
  * 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/. */
 /*
- * The origin of this IDL file is:
- * https://dom.spec.whatwg.org/#domexception
+
+/* https://heycam.github.io/webidl/#es-DOMException
+ * https://heycam.github.io/webidl/#es-DOMException-constructor-object
  */
 
-// XXXkhuey this is an 'exception', not an interface, but we don't have any
-// parser or codegen mechanisms for dealing with exceptions.
+[ExceptionClass]
 interface DOMException {
   const unsigned short INDEX_SIZE_ERR = 1;
   const unsigned short DOMSTRING_SIZE_ERR = 2; // historical