WaiveXrayWrapper.cpp

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * 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/. */

#include "WaiveXrayWrapper.h"
#include "WrapperFactory.h"
#include "jsapi.h"
#include "js/CallAndConstruct.h"  // JS::IsCallable

using namespace JS;

namespace xpc {

bool WaiveXrayWrapper::getOwnPropertyDescriptor(
    JSContext* cx, HandleObject wrapper, HandleId id,
    MutableHandle<mozilla::Maybe<PropertyDescriptor>> desc) const {
  if (!CrossCompartmentWrapper::getOwnPropertyDescriptor(cx, wrapper, id,
                                                         desc)) {
    return false;
  }

  if (desc.isNothing()) {
    return true;
  }

  Rooted<PropertyDescriptor> desc_(cx, *desc);
  if (desc_.hasValue()) {
    if (!WrapperFactory::WaiveXrayAndWrap(cx, desc_.value())) {
      return false;
    }
  }
  if (desc_.hasGetter() && desc_.getter()) {
    RootedValue v(cx, JS::ObjectValue(*desc_.getter()));
    if (!WrapperFactory::WaiveXrayAndWrap(cx, &v)) {
      return false;
    }
    desc_.setGetter(&v.toObject());
  }
  if (desc_.hasSetter() && desc_.setter()) {
    RootedValue v(cx, JS::ObjectValue(*desc_.setter()));
    if (!WrapperFactory::WaiveXrayAndWrap(cx, &v)) {
      return false;
    }
    desc_.setSetter(&v.toObject());
  }

  desc.set(mozilla::Some(desc_.get()));
  return true;
}

bool WaiveXrayWrapper::get(JSContext* cx, HandleObject wrapper,
                           HandleValue receiver, HandleId id,
                           MutableHandleValue vp) const {
  return CrossCompartmentWrapper::get(cx, wrapper, receiver, id, vp) &&
         WrapperFactory::WaiveXrayAndWrap(cx, vp);
}

bool WaiveXrayWrapper::call(JSContext* cx, HandleObject wrapper,
                            const JS::CallArgs& args) const {
  return CrossCompartmentWrapper::call(cx, wrapper, args) &&
         WrapperFactory::WaiveXrayAndWrap(cx, args.rval());
}

bool WaiveXrayWrapper::construct(JSContext* cx, HandleObject wrapper,
                                 const JS::CallArgs& args) const {
  return CrossCompartmentWrapper::construct(cx, wrapper, args) &&
         WrapperFactory::WaiveXrayAndWrap(cx, args.rval());
}

// NB: This is important as the other side of a handshake with FieldGetter. See
// nsXBLProtoImplField.cpp.
bool WaiveXrayWrapper::nativeCall(JSContext* cx, JS::IsAcceptableThis test,
                                  JS::NativeImpl impl,
                                  const JS::CallArgs& args) const {
  return CrossCompartmentWrapper::nativeCall(cx, test, impl, args) &&
         WrapperFactory::WaiveXrayAndWrap(cx, args.rval());
}

bool WaiveXrayWrapper::getPrototype(JSContext* cx, HandleObject wrapper,
                                    MutableHandleObject protop) const {
  return CrossCompartmentWrapper::getPrototype(cx, wrapper, protop) &&
         (!protop || WrapperFactory::WaiveXrayAndWrap(cx, protop));
}

bool WaiveXrayWrapper::getPrototypeIfOrdinary(
    JSContext* cx, HandleObject wrapper, bool* isOrdinary,
    MutableHandleObject protop) const {
  return CrossCompartmentWrapper::getPrototypeIfOrdinary(cx, wrapper,
                                                         isOrdinary, protop) &&
         (!protop || WrapperFactory::WaiveXrayAndWrap(cx, protop));
}

}  // namespace xpc