dom/indexedDB/IDBFileRequest.cpp
author Nika Layzell <nika@thelayzells.com>
Thu, 06 Aug 2020 14:04:13 +0000
changeset 544125 ee09cb88af177571304759bc05c760e3d82fd1ed
parent 538158 3f8100fb74318f9e0b3b6351ade737994d13bcf8
permissions -rw-r--r--
Bug 1656854 - Part 2: Add a BrowsingContextGroup keepalive to BrowserParent shutdown, r=farre In bug 1652085, I added BrowsingContextGroup keepalives while waiting for replies to the discard message, however that message isn't actually sent to the current owner process. Instead, the BrowsingContext is discarded by the PBrowser being destroyed. This should help ensure we also keep the group alive during normal BrowserParent destruction. Differential Revision: https://phabricator.services.mozilla.com/D85897

/* -*- 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 "IDBFileRequest.h"

#include "IDBFileHandle.h"
#include "js/RootingAPI.h"
#include "jsapi.h"
#include "mozilla/Assertions.h"
#include "mozilla/dom/IDBFileRequestBinding.h"
#include "mozilla/dom/ProgressEvent.h"
#include "mozilla/dom/ScriptSettings.h"
#include "mozilla/EventDispatcher.h"
#include "nsCOMPtr.h"
#include "nsDebug.h"
#include "nsError.h"
#include "nsLiteralString.h"

namespace mozilla {
namespace dom {

using namespace mozilla::dom::indexedDB;

IDBFileRequest::IDBFileRequest(IDBFileHandle* aFileHandle,
                               bool aWrapAsDOMRequest)
    : DOMRequest(aFileHandle->GetOwnerGlobal()),
      mFileHandle(aFileHandle),
      mWrapAsDOMRequest(aWrapAsDOMRequest),
      mHasEncoding(false) {
  MOZ_ASSERT(aFileHandle);
  aFileHandle->AssertIsOnOwningThread();
}

IDBFileRequest::~IDBFileRequest() { AssertIsOnOwningThread(); }

// static
RefPtr<IDBFileRequest> IDBFileRequest::Create(IDBFileHandle* aFileHandle,
                                              bool aWrapAsDOMRequest) {
  MOZ_ASSERT(aFileHandle);
  aFileHandle->AssertIsOnOwningThread();

  return new IDBFileRequest(aFileHandle, aWrapAsDOMRequest);
}

void IDBFileRequest::FireProgressEvent(uint64_t aLoaded, uint64_t aTotal) {
  AssertIsOnOwningThread();

  if (NS_FAILED(CheckCurrentGlobalCorrectness())) {
    return;
  }

  ProgressEventInit init;
  init.mBubbles = false;
  init.mCancelable = false;
  init.mLengthComputable = false;
  init.mLoaded = aLoaded;
  init.mTotal = aTotal;

  RefPtr<ProgressEvent> event =
      ProgressEvent::Constructor(this, u"progress"_ns, init);
  DispatchTrustedEvent(event);
}

NS_IMPL_ADDREF_INHERITED(IDBFileRequest, DOMRequest)
NS_IMPL_RELEASE_INHERITED(IDBFileRequest, DOMRequest)

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(IDBFileRequest)
NS_INTERFACE_MAP_END_INHERITING(DOMRequest)

NS_IMPL_CYCLE_COLLECTION_INHERITED(IDBFileRequest, DOMRequest, mFileHandle)

void IDBFileRequest::GetEventTargetParent(EventChainPreVisitor& aVisitor) {
  AssertIsOnOwningThread();

  aVisitor.mCanHandle = true;
  aVisitor.SetParentTarget(mFileHandle, false);
}

// virtual
JSObject* IDBFileRequest::WrapObject(JSContext* aCx,
                                     JS::Handle<JSObject*> aGivenProto) {
  AssertIsOnOwningThread();

  if (mWrapAsDOMRequest) {
    return DOMRequest::WrapObject(aCx, aGivenProto);
  }
  return IDBFileRequest_Binding::Wrap(aCx, this, aGivenProto);
}

}  // namespace dom
}  // namespace mozilla