dom/indexedDB/IDBFileHandle.cpp
author Mike Hommey <mh+mozilla@glandium.org>
Sat, 23 Jan 2016 11:40:24 -0800
changeset 281396 1378b39a9085890ce142e6933ebd50b6537f4ec5
parent 268184 e8c7dfe727cd970e2c3294934e2927b14143c205
child 284462 320bbd5c08627c182009c1df8b4834cef600ba59
permissions -rw-r--r--
Bug 1242074 - Avoid going back and forth between FasterMake and RecursiveMake; r=gps FasterMake needs some RecursiveMake install manifests to have been processed before doing its work, so we can actually end up processing them twice because of the going back and forth from FasterMake in the hybrid build system. Set the dependency at the RecursiveMake level when doing an hybrid build.

/* -*- 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 "IDBFileHandle.h"

#include "IDBEvents.h"
#include "IDBMutableFile.h"
#include "mozilla/Assertions.h"
#include "mozilla/dom/IDBFileHandleBinding.h"
#include "mozilla/dom/filehandle/ActorsChild.h"
#include "mozilla/EventDispatcher.h"
#include "nsServiceManagerUtils.h"
#include "nsWidgetsCID.h"

namespace mozilla {
namespace dom {
namespace indexedDB {

IDBFileHandle::IDBFileHandle(FileMode aMode,
                             IDBMutableFile* aMutableFile)
  : FileHandleBase(DEBUGONLY(aMutableFile->OwningThread(),)
                   aMode)
  , mMutableFile(aMutableFile)
{
  AssertIsOnOwningThread();
}

IDBFileHandle::~IDBFileHandle()
{
  AssertIsOnOwningThread();

  mMutableFile->UnregisterFileHandle(this);
}

// static
already_AddRefed<IDBFileHandle>
IDBFileHandle::Create(IDBMutableFile* aMutableFile,
                      FileMode aMode)
{
  MOZ_ASSERT(aMutableFile);
  aMutableFile->AssertIsOnOwningThread();
  MOZ_ASSERT(aMode == FileMode::Readonly || aMode == FileMode::Readwrite);

  RefPtr<IDBFileHandle> fileHandle =
    new IDBFileHandle(aMode, aMutableFile);

  fileHandle->BindToOwner(aMutableFile);

  // XXX Fix!
  MOZ_ASSERT(NS_IsMainThread(), "This won't work on non-main threads!");

  nsCOMPtr<nsIRunnable> runnable = do_QueryObject(fileHandle);
  nsContentUtils::RunInMetastableState(runnable.forget());

  fileHandle->SetCreating();

  aMutableFile->RegisterFileHandle(fileHandle);

  return fileHandle.forget();
}

already_AddRefed<IDBFileRequest>
IDBFileHandle::GetMetadata(const IDBFileMetadataParameters& aParameters,
                           ErrorResult& aRv)
{
  AssertIsOnOwningThread();

  // Common state checking
  if (!CheckState(aRv)) {
    return nullptr;
  }

  // Argument checking for get metadata.
  if (!aParameters.mSize && !aParameters.mLastModified) {
    aRv.ThrowTypeError<MSG_METADATA_NOT_CONFIGURED>();
    return nullptr;
  }

 // Do nothing if the window is closed
  if (!CheckWindow()) {
    return nullptr;
  }

  FileRequestGetMetadataParams params;
  params.size() = aParameters.mSize;
  params.lastModified() = aParameters.mLastModified;

  RefPtr<FileRequestBase> fileRequest = GenerateFileRequest();

  StartRequest(fileRequest, params);

  return fileRequest.forget().downcast<IDBFileRequest>();
}

NS_IMPL_ADDREF_INHERITED(IDBFileHandle, DOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(IDBFileHandle, DOMEventTargetHelper)

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(IDBFileHandle)
  NS_INTERFACE_MAP_ENTRY(nsIRunnable)
  NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)

NS_IMPL_CYCLE_COLLECTION_CLASS(IDBFileHandle)

NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(IDBFileHandle,
                                                  DOMEventTargetHelper)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mMutableFile)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END

NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(IDBFileHandle,
                                                DOMEventTargetHelper)
  // Don't unlink mMutableFile!
NS_IMPL_CYCLE_COLLECTION_UNLINK_END

NS_IMETHODIMP
IDBFileHandle::Run()
{
  AssertIsOnOwningThread();

  OnReturnToEventLoop();

  return NS_OK;
}

nsresult
IDBFileHandle::PreHandleEvent(EventChainPreVisitor& aVisitor)
{
  AssertIsOnOwningThread();

  aVisitor.mCanHandle = true;
  aVisitor.mParentTarget = mMutableFile;
  return NS_OK;
}

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

  return IDBFileHandleBinding::Wrap(aCx, this, aGivenProto);
}

mozilla::dom::MutableFileBase*
IDBFileHandle::MutableFile() const
{
  AssertIsOnOwningThread();

  return mMutableFile;
}

void
IDBFileHandle::HandleCompleteOrAbort(bool aAborted)
{
  AssertIsOnOwningThread();

  FileHandleBase::HandleCompleteOrAbort(aAborted);

  nsCOMPtr<nsIDOMEvent> event;
  if (aAborted) {
    event = CreateGenericEvent(this, nsDependentString(kAbortEventType),
                               eDoesBubble, eNotCancelable);
  } else {
    event = CreateGenericEvent(this, nsDependentString(kCompleteEventType),
                               eDoesNotBubble, eNotCancelable);
  }
  if (NS_WARN_IF(!event)) {
    return;
  }

  bool dummy;
  if (NS_FAILED(DispatchEvent(event, &dummy))) {
    NS_WARNING("DispatchEvent failed!");
  }
}

bool
IDBFileHandle::CheckWindow()
{
  AssertIsOnOwningThread();

  return GetOwner();
}

already_AddRefed<mozilla::dom::FileRequestBase>
IDBFileHandle::GenerateFileRequest()
{
  AssertIsOnOwningThread();

  return IDBFileRequest::Create(GetOwner(), this,
                                /* aWrapAsDOMRequest */ false);
}

} // namespace indexedDB
} // namespace dom
} // namespace mozilla