gecko-dev/dom/indexedDB/IDBFileHandle.cpp
2015-01-11 21:35:24 +00:00

197 lines
4.7 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=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/dom/FileService.h"
#include "mozilla/dom/IDBFileHandleBinding.h"
#include "mozilla/dom/MetadataHelper.h"
#include "mozilla/EventDispatcher.h"
#include "nsIAppShell.h"
#include "nsServiceManagerUtils.h"
#include "nsWidgetsCID.h"
namespace mozilla {
namespace dom {
namespace indexedDB {
namespace {
NS_DEFINE_CID(kAppShellCID2, NS_APPSHELL_CID);
} // anonymous namespace
IDBFileHandle::IDBFileHandle(FileMode aMode,
RequestMode aRequestMode,
IDBMutableFile* aMutableFile)
: FileHandleBase(aMode, aRequestMode)
, mMutableFile(aMutableFile)
{
}
IDBFileHandle::~IDBFileHandle()
{
}
// static
already_AddRefed<IDBFileHandle>
IDBFileHandle::Create(FileMode aMode,
RequestMode aRequestMode,
IDBMutableFile* aMutableFile)
{
MOZ_ASSERT(NS_IsMainThread(), "Wrong thread!");
nsRefPtr<IDBFileHandle> fileHandle =
new IDBFileHandle(aMode, aRequestMode, aMutableFile);
fileHandle->BindToOwner(aMutableFile);
nsCOMPtr<nsIAppShell> appShell = do_GetService(kAppShellCID2);
if (NS_WARN_IF(!appShell)) {
return nullptr;
}
nsresult rv = appShell->RunBeforeNextEvent(fileHandle);
if (NS_WARN_IF(NS_FAILED(rv))) {
return nullptr;
}
fileHandle->SetCreating();
FileService* service = FileService::GetOrCreate();
if (NS_WARN_IF(!service)) {
return nullptr;
}
rv = service->Enqueue(fileHandle, nullptr);
if (NS_WARN_IF(NS_FAILED(rv))) {
return nullptr;
}
return fileHandle.forget();
}
mozilla::dom::MutableFileBase*
IDBFileHandle::MutableFile() const
{
return mMutableFile;
}
NS_IMPL_CYCLE_COLLECTION_INHERITED(IDBFileHandle, DOMEventTargetHelper,
mMutableFile)
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_ADDREF_INHERITED(IDBFileHandle, DOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(IDBFileHandle, DOMEventTargetHelper)
nsresult
IDBFileHandle::PreHandleEvent(EventChainPreVisitor& aVisitor)
{
MOZ_ASSERT(NS_IsMainThread(), "Wrong thread!");
aVisitor.mCanHandle = true;
aVisitor.mParentTarget = mMutableFile;
return NS_OK;
}
// virtual
JSObject*
IDBFileHandle::WrapObject(JSContext* aCx)
{
return IDBFileHandleBinding::Wrap(aCx, this);
}
already_AddRefed<IDBFileRequest>
IDBFileHandle::GetMetadata(const IDBFileMetadataParameters& aParameters,
ErrorResult& aRv)
{
MOZ_ASSERT(NS_IsMainThread(), "Wrong thread!");
// Common state checking
if (!CheckState(aRv)) {
return nullptr;
}
// Do nothing if the window is closed
if (!CheckWindow()) {
return nullptr;
}
nsRefPtr<MetadataParameters> params =
new MetadataParameters(aParameters.mSize, aParameters.mLastModified);
if (!params->IsConfigured()) {
aRv.ThrowTypeError(MSG_METADATA_NOT_CONFIGURED);
return nullptr;
}
nsRefPtr<FileRequestBase> fileRequest = GenerateFileRequest();
nsRefPtr<MetadataHelper> helper =
new MetadataHelper(this, fileRequest, params);
if (NS_WARN_IF(NS_FAILED(helper->Enqueue()))) {
aRv.Throw(NS_ERROR_DOM_FILEHANDLE_UNKNOWN_ERR);
return nullptr;
}
return fileRequest.forget().downcast<IDBFileRequest>();
}
NS_IMETHODIMP
IDBFileHandle::Run()
{
OnReturnToEventLoop();
return NS_OK;
}
nsresult
IDBFileHandle::OnCompleteOrAbort(bool 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 NS_ERROR_DOM_FILEHANDLE_UNKNOWN_ERR;
}
bool dummy;
if (NS_FAILED(DispatchEvent(event, &dummy))) {
NS_WARNING("Dispatch failed!");
}
return NS_OK;
}
bool
IDBFileHandle::CheckWindow()
{
return GetOwner();
}
already_AddRefed<mozilla::dom::FileRequestBase>
IDBFileHandle::GenerateFileRequest()
{
MOZ_ASSERT(NS_IsMainThread(), "Wrong thread!");
return IDBFileRequest::Create(GetOwner(), this,
/* aWrapAsDOMRequest */ false);
}
} // namespace indexedDB
} // namespace dom
} // namespace mozilla