gecko/dom/indexedDB/IDBFileHandle.cpp
2012-07-30 17:20:58 +03:00

121 lines
3.2 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 "nsIStandardFileStream.h"
#include "mozilla/dom/file/File.h"
#include "nsDOMClassInfoID.h"
#include "FileStream.h"
#include "IDBDatabase.h"
USING_INDEXEDDB_NAMESPACE
namespace {
inline
already_AddRefed<nsIFile>
GetFileFor(FileInfo* aFileInfo)
{
FileManager* fileManager = aFileInfo->Manager();
nsCOMPtr<nsIFile> directory = fileManager->GetDirectory();
NS_ENSURE_TRUE(directory, nullptr);
nsCOMPtr<nsIFile> file = fileManager->GetFileForId(directory,
aFileInfo->Id());
NS_ENSURE_TRUE(file, nullptr);
return file.forget();
}
} // anonymous namespace
// static
already_AddRefed<IDBFileHandle>
IDBFileHandle::Create(IDBDatabase* aDatabase,
const nsAString& aName,
const nsAString& aType,
already_AddRefed<FileInfo> aFileInfo)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
nsRefPtr<FileInfo> fileInfo(aFileInfo);
NS_ASSERTION(fileInfo, "Null pointer!");
nsRefPtr<IDBFileHandle> newFile = new IDBFileHandle();
newFile->BindToOwner(aDatabase);
newFile->mFileStorage = aDatabase;
newFile->mName = aName;
newFile->mType = aType;
newFile->mFile = GetFileFor(fileInfo);
NS_ENSURE_TRUE(newFile->mFile, nullptr);
newFile->mFileName.AppendInt(fileInfo->Id());
fileInfo.swap(newFile->mFileInfo);
return newFile.forget();
}
already_AddRefed<nsISupports>
IDBFileHandle::CreateStream(nsIFile* aFile, bool aReadOnly)
{
nsRefPtr<FileStream> stream = new FileStream();
nsString streamMode;
if (aReadOnly) {
streamMode.AssignLiteral("rb");
}
else {
streamMode.AssignLiteral("r+b");
}
nsresult rv = stream->Init(aFile, streamMode,
nsIStandardFileStream::FLAGS_DEFER_OPEN);
NS_ENSURE_SUCCESS(rv, nullptr);
nsCOMPtr<nsISupports> result =
NS_ISUPPORTS_CAST(nsIStandardFileStream*, stream);
return result.forget();
}
already_AddRefed<nsIDOMFile>
IDBFileHandle::CreateFileObject(mozilla::dom::file::LockedFile* aLockedFile,
PRUint32 aFileSize)
{
nsCOMPtr<nsIDOMFile> file = new mozilla::dom::file::File(
mName, mType, aFileSize, mFile, aLockedFile, mFileInfo);
return file.forget();
}
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(IDBFileHandle)
NS_INTERFACE_MAP_ENTRY(nsIIDBFileHandle)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(IDBFileHandle)
NS_INTERFACE_MAP_END_INHERITING(FileHandle)
NS_IMPL_ADDREF_INHERITED(IDBFileHandle, FileHandle)
NS_IMPL_RELEASE_INHERITED(IDBFileHandle, FileHandle)
DOMCI_DATA(IDBFileHandle, IDBFileHandle)
NS_IMETHODIMP
IDBFileHandle::GetDatabase(nsIIDBDatabase** aDatabase)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
nsCOMPtr<nsIIDBDatabase> database = do_QueryInterface(mFileStorage);
NS_ASSERTION(database, "This should always succeed!");
database.forget(aDatabase);
return NS_OK;
}