dom/clients/api/Client.cpp
author Emilio Cobos Álvarez <emilio@crisal.io>
Tue, 02 Jul 2019 18:50:04 +0000
changeset 480995 6525ac41c35455512bc1b681df331a5b74cb75cc
parent 475727 fffc348e55232b77c9bf026d5b3bd00012961113
child 494731 93327435846ae8af7726b357199913d135dc1460
permissions -rw-r--r--
Bug 1562789 - SmallPointerArray should support moves, and have an IsEmpty() helper. r=froydnj This also implicitly deletes its copy-assignment operator and copy-constructor, which is great since it's a huge footgun. Differential Revision: https://phabricator.services.mozilla.com/D36549

/* -*- 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 "Client.h"

#include "ClientDOMUtil.h"
#include "mozilla/dom/ClientHandle.h"
#include "mozilla/dom/ClientIPCTypes.h"
#include "mozilla/dom/ClientManager.h"
#include "mozilla/dom/ClientState.h"
#include "mozilla/dom/DOMMozPromiseRequestHolder.h"
#include "mozilla/dom/MessagePortBinding.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/WorkerPrivate.h"
#include "mozilla/dom/WorkerScope.h"
#include "nsIGlobalObject.h"

namespace mozilla {
namespace dom {

using mozilla::dom::ipc::StructuredCloneData;

NS_IMPL_CYCLE_COLLECTING_ADDREF(mozilla::dom::Client);
NS_IMPL_CYCLE_COLLECTING_RELEASE(mozilla::dom::Client);
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(mozilla::dom::Client, mGlobal);

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(mozilla::dom::Client)
  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
  NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END

void Client::EnsureHandle() {
  NS_ASSERT_OWNINGTHREAD(mozilla::dom::Client);
  if (!mHandle) {
    mHandle = ClientManager::CreateHandle(
        ClientInfo(mData->info()),
        mGlobal->EventTargetFor(TaskCategory::Other));
  }
}

Client::Client(nsIGlobalObject* aGlobal, const ClientInfoAndState& aData)
    : mGlobal(aGlobal), mData(MakeUnique<ClientInfoAndState>(aData)) {
  MOZ_DIAGNOSTIC_ASSERT(mGlobal);
}

TimeStamp Client::CreationTime() const { return mData->info().creationTime(); }

TimeStamp Client::LastFocusTime() const {
  if (mData->info().type() != ClientType::Window) {
    return TimeStamp();
  }
  return mData->state().get_IPCClientWindowState().lastFocusTime();
}

StorageAccess Client::GetStorageAccess() const {
  ClientState state(ClientState::FromIPC(mData->state()));
  return state.GetStorageAccess();
}

JSObject* Client::WrapObject(JSContext* aCx,
                             JS::Handle<JSObject*> aGivenProto) {
  if (mData->info().type() == ClientType::Window) {
    return WindowClient_Binding::Wrap(aCx, this, aGivenProto);
  }
  return Client_Binding::Wrap(aCx, this, aGivenProto);
}

nsIGlobalObject* Client::GetParentObject() const { return mGlobal; }

void Client::GetUrl(nsAString& aUrlOut) const {
  CopyUTF8toUTF16(mData->info().url(), aUrlOut);
}

void Client::GetId(nsAString& aIdOut) const {
  char buf[NSID_LENGTH];
  mData->info().id().ToProvidedString(buf);
  NS_ConvertASCIItoUTF16 uuid(buf);

  // Remove {} and the null terminator
  aIdOut.Assign(Substring(uuid, 1, NSID_LENGTH - 3));
}

ClientType Client::Type() const { return mData->info().type(); }

FrameType Client::GetFrameType() const { return mData->info().frameType(); }

void Client::PostMessage(JSContext* aCx, JS::Handle<JS::Value> aMessage,
                         const Sequence<JSObject*>& aTransferable,
                         ErrorResult& aRv) {
  MOZ_ASSERT(!NS_IsMainThread());
  WorkerPrivate* workerPrivate = GetCurrentThreadWorkerPrivate();
  MOZ_DIAGNOSTIC_ASSERT(workerPrivate);
  MOZ_DIAGNOSTIC_ASSERT(workerPrivate->IsServiceWorker());
  workerPrivate->AssertIsOnWorkerThread();

  JS::Rooted<JS::Value> transferable(aCx, JS::UndefinedValue());
  aRv = nsContentUtils::CreateJSValueFromSequenceOfObject(aCx, aTransferable,
                                                          &transferable);
  if (aRv.Failed()) {
    return;
  }

  StructuredCloneData data;
  data.Write(aCx, aMessage, transferable, aRv);
  if (aRv.Failed()) {
    return;
  }

  EnsureHandle();
  mHandle->PostMessage(data, workerPrivate->GetServiceWorkerDescriptor());
}

void Client::PostMessage(JSContext* aCx, JS::Handle<JS::Value> aMessage,
                         const PostMessageOptions& aOptions, ErrorResult& aRv) {
  PostMessage(aCx, aMessage, aOptions.mTransfer, aRv);
}

VisibilityState Client::GetVisibilityState() const {
  return mData->state().get_IPCClientWindowState().visibilityState();
}

bool Client::Focused() const {
  return mData->state().get_IPCClientWindowState().focused();
}

already_AddRefed<Promise> Client::Focus(ErrorResult& aRv) {
  MOZ_ASSERT(!NS_IsMainThread());
  WorkerPrivate* workerPrivate = GetCurrentThreadWorkerPrivate();
  MOZ_DIAGNOSTIC_ASSERT(workerPrivate);
  MOZ_DIAGNOSTIC_ASSERT(workerPrivate->IsServiceWorker());
  workerPrivate->AssertIsOnWorkerThread();

  RefPtr<Promise> outerPromise = Promise::Create(mGlobal, aRv);
  if (aRv.Failed()) {
    return outerPromise.forget();
  }

  if (!workerPrivate->GlobalScope()->WindowInteractionAllowed()) {
    outerPromise->MaybeReject(NS_ERROR_DOM_INVALID_ACCESS_ERR);
    return outerPromise.forget();
  }

  EnsureHandle();

  IPCClientInfo ipcClientInfo(mData->info());
  auto holder =
      MakeRefPtr<DOMMozPromiseRequestHolder<ClientStatePromise>>(mGlobal);

  mHandle->Focus()
      ->Then(
          mGlobal->EventTargetFor(TaskCategory::Other), __func__,
          [ipcClientInfo, holder, outerPromise](const ClientState& aResult) {
            holder->Complete();
            NS_ENSURE_TRUE_VOID(holder->GetParentObject());
            RefPtr<Client> newClient =
                new Client(holder->GetParentObject(),
                           ClientInfoAndState(ipcClientInfo, aResult.ToIPC()));
            outerPromise->MaybeResolve(newClient);
          },
          [holder, outerPromise](nsresult aResult) {
            holder->Complete();
            outerPromise->MaybeReject(aResult);
          })
      ->Track(*holder);

  return outerPromise.forget();
}

already_AddRefed<Promise> Client::Navigate(const nsAString& aURL,
                                           ErrorResult& aRv) {
  MOZ_ASSERT(!NS_IsMainThread());
  WorkerPrivate* workerPrivate = GetCurrentThreadWorkerPrivate();
  MOZ_DIAGNOSTIC_ASSERT(workerPrivate);
  MOZ_DIAGNOSTIC_ASSERT(workerPrivate->IsServiceWorker());
  workerPrivate->AssertIsOnWorkerThread();

  RefPtr<Promise> outerPromise = Promise::Create(mGlobal, aRv);
  if (aRv.Failed()) {
    return outerPromise.forget();
  }

  ClientNavigateArgs args(mData->info(), NS_ConvertUTF16toUTF8(aURL),
                          workerPrivate->GetLocationInfo().mHref);
  RefPtr<Client> self = this;

  StartClientManagerOp(
      &ClientManager::Navigate, args, mGlobal,
      [self, outerPromise](const ClientOpResult& aResult) {
        if (aResult.type() != ClientOpResult::TClientInfoAndState) {
          outerPromise->MaybeResolve(JS::NullHandleValue);
          return;
        }
        RefPtr<Client> newClient =
            new Client(self->mGlobal, aResult.get_ClientInfoAndState());
        outerPromise->MaybeResolve(newClient);
      },
      [self, outerPromise](nsresult aResult) {
        // TODO: Improve this error in bug 1412856.  Ideally we should throw
        //       the TypeError in the child process and pass it back to here.
        outerPromise->MaybeReject(NS_ERROR_TYPE_ERR);
      });

  return outerPromise.forget();
}

}  // namespace dom
}  // namespace mozilla