/* -*- 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 "mozilla/dom/WebAuthnManagerBase.h"

#include "mozilla/dom/WebAuthnTransactionChild.h"

#include "mozilla/dom/Event.h"

#include "nsGlobalWindowInner.h"

#include "nsPIWindowRoot.h"

namespace mozilla {

namespace dom {

NS_NAMED_LITERAL_STRING(kDeactivateEvent, "deactivate");

NS_NAMED_LITERAL_STRING(kVisibilityChange, "visibilitychange");

WebAuthnManagerBase::WebAuthnManagerBase(nsPIDOMWindowInner* aParent)

  : mParent(aParent)

{

  MOZ_ASSERT(NS_IsMainThread());

  MOZ_ASSERT(aParent);

}

WebAuthnManagerBase::~WebAuthnManagerBase()

{

  MOZ_ASSERT(NS_IsMainThread());

}

/***********************************************************************

 * IPC Protocol Implementation

 **********************************************************************/

bool

WebAuthnManagerBase::MaybeCreateBackgroundActor()

{

  MOZ_ASSERT(NS_IsMainThread());

  if (mChild) {

    return true;

  }

  PBackgroundChild* actorChild = BackgroundChild::GetOrCreateForCurrentThread();

  if (NS_WARN_IF(!actorChild)) {

    return false;

  }

  RefPtr<WebAuthnTransactionChild> mgr(new WebAuthnTransactionChild(this));

  PWebAuthnTransactionChild* constructedMgr =

    actorChild->SendPWebAuthnTransactionConstructor(mgr);

  if (NS_WARN_IF(!constructedMgr)) {

    return false;

  }

  MOZ_ASSERT(constructedMgr == mgr);

  mChild = mgr.forget();

  return true;

}

void

WebAuthnManagerBase::ActorDestroyed()

{

  MOZ_ASSERT(NS_IsMainThread());

  mChild = nullptr;

}

/***********************************************************************

 * Event Handling

 **********************************************************************/

void

WebAuthnManagerBase::ListenForVisibilityEvents()

{

  MOZ_ASSERT(NS_IsMainThread());

  nsCOMPtr<nsPIDOMWindowOuter> outer = mParent->GetOuterWindow();

  if (NS_WARN_IF(!outer)) {

    return;

  }

  nsCOMPtr<EventTarget> windowRoot = outer->GetTopWindowRoot();

  if (NS_WARN_IF(!windowRoot)) {

    return;

  }

  nsresult rv = windowRoot->AddEventListener(kDeactivateEvent, this,

                                             /* use capture */ true,

                                             /* wants untrusted */ false);

  Unused << NS_WARN_IF(NS_FAILED(rv));

  rv = windowRoot->AddEventListener(kVisibilityChange, this,

                                    /* use capture */ true,

                                    /* wants untrusted */ false);

  Unused << NS_WARN_IF(NS_FAILED(rv));

}

void

WebAuthnManagerBase::StopListeningForVisibilityEvents()

{

  MOZ_ASSERT(NS_IsMainThread());

  nsCOMPtr<nsPIDOMWindowOuter> outer = mParent->GetOuterWindow();

  if (NS_WARN_IF(!outer)) {

    return;

  }

  nsCOMPtr<EventTarget> windowRoot = outer->GetTopWindowRoot();

  if (NS_WARN_IF(!windowRoot)) {

    return;

  }

  windowRoot->RemoveEventListener(kDeactivateEvent, this,

                                  /* use capture */ true);

  windowRoot->RemoveEventListener(kVisibilityChange, this,

                                  /* use capture */ true);

}

NS_IMETHODIMP

WebAuthnManagerBase::HandleEvent(Event* aEvent)

{

  MOZ_ASSERT(NS_IsMainThread());

  MOZ_ASSERT(aEvent);

  nsAutoString type;

  aEvent->GetType(type);

  if (!type.Equals(kDeactivateEvent) && !type.Equals(kVisibilityChange)) {

    return NS_ERROR_FAILURE;

  }

  // The "deactivate" event on the root window has no

  // "current inner window" and thus GetTarget() is always null.

  if (type.Equals(kVisibilityChange)) {

    nsCOMPtr<nsIDocument> doc = do_QueryInterface(aEvent->GetTarget());

    if (NS_WARN_IF(!doc) || !doc->Hidden()) {

      return NS_OK;

    }

    nsGlobalWindowInner* win = nsGlobalWindowInner::Cast(doc->GetInnerWindow());

    if (NS_WARN_IF(!win) || !win->IsTopInnerWindow()) {

      return NS_OK;

    }

  }

  CancelTransaction(NS_ERROR_DOM_ABORT_ERR);

  return NS_OK;

}

}

}