static bool
FilterPropertyDescriptor(JSContext* cx, HandleObject wrapper, HandleId id, JS::MutableHandle<JSPropertyDescriptor> desc)
{
MOZ_ASSERT(!JS_IsExceptionPending(cx));
bool getAllowed = Policy::check(cx, wrapper, id, Wrapper::GET);
if (JS_IsExceptionPending(cx))
return false;
bool setAllowed = Policy::check(cx, wrapper, id, Wrapper::SET);
if (JS_IsExceptionPending(cx))
return false;
MOZ_ASSERT(getAllowed || setAllowed,
"Filtering policy should not allow GET_PROPERTY_DESCRIPTOR in this case");
if (!desc.hasGetterOrSetter()) {
// Handle value properties.
if (!getAllowed)
desc.value().setUndefined();
} else {
// Handle accessor properties.
MOZ_ASSERT(desc.value().isUndefined());
if (!getAllowed)
desc.setGetter(nullptr);
if (!setAllowed)
desc.setSetter(nullptr);
}
return true;
}
bool
WaiveXrayWrapper::getOwnPropertyDescriptor(JSContext *cx, HandleObject wrapper,
HandleId id, JS::MutableHandle<js::PropertyDescriptor> desc,
unsigned flags)
{
return CrossCompartmentWrapper::getOwnPropertyDescriptor(cx, wrapper, id, desc, flags) &&
WrapperFactory::WaiveXrayAndWrap(cx, desc.value().address()) && WaiveAccessors(cx, desc);
}
bool
WaiveXrayWrapper::getOwnPropertyDescriptor(JSContext *cx, HandleObject wrapper,
HandleId id, JS::MutableHandle<JSPropertyDescriptor> desc)
const
{
return CrossCompartmentWrapper::getOwnPropertyDescriptor(cx, wrapper, id, desc) &&
WrapperFactory::WaiveXrayAndWrap(cx, desc.value()) && WaiveAccessors(cx, desc);
}
bool
WindowNamedPropertiesHandler::getOwnPropDescriptor(JSContext* aCx,
JS::Handle<JSObject*> aProxy,
JS::Handle<jsid> aId,
bool /* unused */,
JS::MutableHandle<JSPropertyDescriptor> aDesc)
const
{
if (!JSID_IS_STRING(aId)) {
// Nothing to do if we're resolving a non-string property.
return true;
}
JS::Rooted<JSObject*> global(aCx, JS_GetGlobalForObject(aCx, aProxy));
if (HasPropertyOnPrototype(aCx, aProxy, aId)) {
return true;
}
nsAutoJSString str;
if (!str.init(aCx, JSID_TO_STRING(aId))) {
return false;
}
// Grab the DOM window.
nsGlobalWindow* win = GetWindowFromGlobal(global);
if (win->Length() > 0) {
nsCOMPtr<nsIDOMWindow> childWin = win->GetChildWindow(str);
if (childWin && ShouldExposeChildWindow(str, childWin)) {
// We found a subframe of the right name. Shadowing via |var foo| in
// global scope is still allowed, since |var| only looks up |own|
// properties. But unqualified shadowing will fail, per-spec.
JS::Rooted<JS::Value> v(aCx);
if (!WrapObject(aCx, childWin, &v)) {
return false;
}
aDesc.object().set(aProxy);
aDesc.value().set(v);
aDesc.setAttributes(JSPROP_ENUMERATE);
return true;
}
}
// The rest of this function is for HTML documents only.
nsCOMPtr<nsIHTMLDocument> htmlDoc = do_QueryInterface(win->GetExtantDoc());
if (!htmlDoc) {
return true;
}
nsHTMLDocument* document = static_cast<nsHTMLDocument*>(htmlDoc.get());
Element* element = document->GetElementById(str);
if (element) {
JS::Rooted<JS::Value> v(aCx);
if (!WrapObject(aCx, element, &v)) {
return false;
}
aDesc.object().set(aProxy);
aDesc.value().set(v);
aDesc.setAttributes(JSPROP_ENUMERATE);
return true;
}
nsWrapperCache* cache;
nsISupports* result = document->ResolveName(str, &cache);
if (!result) {
return true;
}
JS::Rooted<JS::Value> v(aCx);
if (!WrapObject(aCx, result, cache, nullptr, &v)) {
return false;
}
aDesc.object().set(aProxy);
aDesc.value().set(v);
aDesc.setAttributes(JSPROP_ENUMERATE);
return true;
}