/* -*- 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 "Presentation.h"

#include <ctype.h>

#include "mozilla/dom/PresentationBinding.h"

#include "mozilla/dom/Promise.h"

#include "nsContentUtils.h"

#include "nsCycleCollectionParticipant.h"

#include "nsIDocShell.h"

#include "nsIPresentationService.h"

#include "nsIScriptSecurityManager.h"

#include "nsJSUtils.h"

#include "nsNetUtil.h"

#include "nsPIDOMWindow.h"

#include "nsSandboxFlags.h"

#include "nsServiceManagerUtils.h"

#include "PresentationReceiver.h"

namespace mozilla {

namespace dom {

NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(Presentation,

                                      mWindow,

                                      mDefaultRequest, mReceiver)

NS_IMPL_CYCLE_COLLECTING_ADDREF(Presentation)

NS_IMPL_CYCLE_COLLECTING_RELEASE(Presentation)

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Presentation)

  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY

  NS_INTERFACE_MAP_ENTRY(nsISupports)

NS_INTERFACE_MAP_END

/* static */ already_AddRefed<Presentation>

Presentation::Create(nsPIDOMWindowInner* aWindow)

{

  RefPtr<Presentation> presentation = new Presentation(aWindow);

  return presentation.forget();

}

Presentation::Presentation(nsPIDOMWindowInner* aWindow)

  : mWindow(aWindow)

{

}

Presentation::~Presentation()

{

}

/* virtual */ JSObject*

Presentation::WrapObject(JSContext* aCx,

                         JS::Handle<JSObject*> aGivenProto)

{

  return Presentation_Binding::Wrap(aCx, this, aGivenProto);

}

void

Presentation::SetDefaultRequest(PresentationRequest* aRequest)

{

  if (nsContentUtils::ShouldResistFingerprinting()) {

    return;

  }

  nsCOMPtr<nsIDocument> doc = mWindow ? mWindow->GetExtantDoc() : nullptr;

  if (NS_WARN_IF(!doc)) {

    return;

  }

  if (doc->GetSandboxFlags() & SANDBOXED_PRESENTATION) {

    return;

  }

  mDefaultRequest = aRequest;

}

already_AddRefed<PresentationRequest>

Presentation::GetDefaultRequest() const

{

  if (nsContentUtils::ShouldResistFingerprinting()) {

    return nullptr;

  }

  RefPtr<PresentationRequest> request = mDefaultRequest;

  return request.forget();

}

already_AddRefed<PresentationReceiver>

Presentation::GetReceiver()

{

  if (nsContentUtils::ShouldResistFingerprinting()) {

    return nullptr;

  }

  // return the same receiver if already created

  if (mReceiver) {

    RefPtr<PresentationReceiver> receiver = mReceiver;

    return receiver.forget();

  }

  if (!HasReceiverSupport() || !IsInPresentedContent()) {

    return nullptr;

  }

  mReceiver = PresentationReceiver::Create(mWindow);

  if (NS_WARN_IF(!mReceiver)) {

    MOZ_ASSERT(mReceiver);

    return nullptr;

  }

  RefPtr<PresentationReceiver> receiver = mReceiver;

  return receiver.forget();

}

void

Presentation::SetStartSessionUnsettled(bool aIsUnsettled)

{

  mStartSessionUnsettled = aIsUnsettled;

}

bool

Presentation::IsStartSessionUnsettled() const

{

  return mStartSessionUnsettled;

}

bool

Presentation::HasReceiverSupport() const

{

  if (!mWindow) {

    return false;

  }

  // Grant access to browser receiving pages and their same-origin iframes. (App

  // pages should be controlled by "presentation" permission in app manifests.)

  nsCOMPtr<nsIDocShell> docShell = mWindow->GetDocShell();

  if (!docShell) {

    return false;

  }

  if (!Preferences::GetBool("dom.presentation.testing.simulate-receiver") &&

      !docShell->GetIsInMozBrowser() &&

      !docShell->GetIsTopLevelContentDocShell()) {

    return false;

  }

  nsAutoString presentationURL;

  nsContentUtils::GetPresentationURL(docShell, presentationURL);

  if (presentationURL.IsEmpty()) {

    return false;

  }

  nsCOMPtr<nsIScriptSecurityManager> securityManager =

    nsContentUtils::GetSecurityManager();

  if (!securityManager) {

    return false;

  }

  nsCOMPtr<nsIURI> presentationURI;

  nsresult rv = NS_NewURI(getter_AddRefs(presentationURI), presentationURL);

  if (NS_FAILED(rv)) {

    return false;

  }

  bool isPrivateWin = false;

  nsCOMPtr<nsIDocument> doc = mWindow->GetExtantDoc();

  if (doc) {

    isPrivateWin =

      doc->NodePrincipal()->OriginAttributesRef().mPrivateBrowsingId > 0;

  }

  nsCOMPtr<nsIURI> docURI = mWindow->GetDocumentURI();

  return NS_SUCCEEDED(securityManager->CheckSameOriginURI(presentationURI,

                                                          docURI,

                                                          false,

                                                          isPrivateWin));

}

bool

Presentation::IsInPresentedContent() const

{

  if (!mWindow) {

    return false;

  }

  nsCOMPtr<nsIDocShell> docShell = mWindow->GetDocShell();

  MOZ_ASSERT(docShell);

  nsAutoString presentationURL;

  nsContentUtils::GetPresentationURL(docShell, presentationURL);

  return !presentationURL.IsEmpty();

}

} // namespace dom

} // namespace mozilla