bool
ChromeObjectWrapper::has(JSContext *cx, JS::Handle<JSObject*> wrapper,
JS::Handle<jsid> id, bool *bp)
{
assertEnteredPolicy(cx, wrapper, id);
// Try the lookup on the base wrapper if permitted.
if (AllowedByBase(cx, wrapper, id, js::Wrapper::GET) &&
!ChromeObjectWrapperBase::has(cx, wrapper, id, bp))
{
return false;
}
// If we found something or have no prototype, we're done.
JSObject *wrapperProto;
if (!JS_GetPrototype(cx, wrapper, &wrapperProto))
return false;
if (*bp || !wrapperProto)
return true;
// Try the prototype if that failed.
MOZ_ASSERT(js::IsObjectInContextCompartment(wrapper, cx));
JSPropertyDescriptor desc;
if (!JS_GetPropertyDescriptorById(cx, wrapperProto, id, 0, &desc))
return false;
*bp = !!desc.obj;
return true;
}
bool
ChromeObjectWrapper::get(JSContext *cx, JS::Handle<JSObject*> wrapper,
JS::Handle<JSObject*> receiver, JS::Handle<jsid> id,
JS::MutableHandle<JS::Value> vp)
{
assertEnteredPolicy(cx, wrapper, id);
vp.setUndefined();
JSPropertyDescriptor desc;
// Only call through to the get trap on the underlying object if we're
// allowed to see the property, and if what we'll find is not on a standard
// prototype.
if (AllowedByBase(cx, wrapper, id, js::Wrapper::GET) &&
!PropIsFromStandardPrototype(cx, wrapper, id))
{
// Call the get trap.
if (!ChromeObjectWrapperBase::get(cx, wrapper, receiver, id, vp))
return false;
// If we found something, we're done.
if (!vp.isUndefined())
return true;
}
// If we have no proto, we're done.
JSObject *wrapperProto;
if (!JS_GetPrototype(cx, wrapper, &wrapperProto))
return false;
if (!wrapperProto)
return true;
// Try the prototype.
MOZ_ASSERT(js::IsObjectInContextCompartment(wrapper, cx));
return js::GetGeneric(cx, wrapperProto, receiver, id, vp.address());
}
bool
ChromeObjectWrapper::getPropertyDescriptor(JSContext *cx,
JS::Handle<JSObject*> wrapper,
JS::Handle<jsid> id,
js::PropertyDescriptor *desc,
unsigned flags)
{
assertEnteredPolicy(cx, wrapper, id);
// First, try a lookup on the base wrapper if permitted.
desc->obj = NULL;
if (AllowedByBase(cx, wrapper, id, Wrapper::GET) &&
!ChromeObjectWrapperBase::getPropertyDescriptor(cx, wrapper, id,
desc, flags)) {
return false;
}
// If the property is something that can be found on a standard prototype,
// prefer the one we'll get via the prototype chain in the content
// compartment.
if (desc->obj && PropIsFromStandardPrototype(cx, desc))
desc->obj = NULL;
// If we found something or have no proto, we're done.
JSObject *wrapperProto;
if (!JS_GetPrototype(cx, wrapper, &wrapperProto))
return false;
if (desc->obj || !wrapperProto)
return true;
// If not, try doing the lookup on the prototype.
MOZ_ASSERT(js::IsObjectInContextCompartment(wrapper, cx));
return JS_GetPropertyDescriptorById(cx, wrapperProto, id, 0, desc);
}
bool
ChromeObjectWrapper::has(JSContext *cx, HandleObject wrapper,
HandleId id, bool *bp)
{
assertEnteredPolicy(cx, wrapper, id);
// Try the lookup on the base wrapper if permitted.
if (AllowedByBase(cx, wrapper, id, js::Wrapper::GET) &&
!ChromeObjectWrapperBase::has(cx, wrapper, id, bp))
{
return false;
}
// If we found something or have no prototype, we're done.
RootedObject wrapperProto(cx);
if (!JS_GetPrototype(cx, wrapper, wrapperProto.address()))
return false;
if (*bp || !wrapperProto)
return true;
// Try the prototype if that failed.
MOZ_ASSERT(js::IsObjectInContextCompartment(wrapper, cx));
Rooted<JSPropertyDescriptor> desc(cx);
if (!JS_GetPropertyDescriptorById(cx, wrapperProto, id, 0, desc.address()))
return false;
*bp = !!desc.object();
return true;
}