The Tor Browser: dom/indexedDB/IDBFileHandle.cpp@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* vim: set ts=2 et sw=2 tw=80: */

     3 /* This Source Code Form is subject to the terms of the Mozilla Public

     4  * License, v. 2.0. If a copy of the MPL was not distributed with this file,

     5  * You can obtain one at http://mozilla.org/MPL/2.0/. */

     7 #include "IDBFileHandle.h"

     9 #include "mozilla/dom/file/File.h"

    10 #include "mozilla/dom/IDBFileHandleBinding.h"

    11 #include "mozilla/dom/quota/FileStreams.h"

    13 #include "IDBDatabase.h"

    15 USING_INDEXEDDB_NAMESPACE

    16 USING_QUOTA_NAMESPACE

    18 namespace {

    20 inline

    21 already_AddRefed<nsIFile>

    22 GetFileFor(FileInfo* aFileInfo)

    24 {

    25   FileManager* fileManager = aFileInfo->Manager();

    26   nsCOMPtr<nsIFile> directory = fileManager->GetDirectory();

    27   NS_ENSURE_TRUE(directory, nullptr);

    29   nsCOMPtr<nsIFile> file = fileManager->GetFileForId(directory,

    30                                                      aFileInfo->Id());

    31   NS_ENSURE_TRUE(file, nullptr);

    33   return file.forget();

    34 }

    36 } // anonymous namespace

    38 IDBFileHandle::IDBFileHandle(IDBDatabase* aOwner)

    39   : FileHandle(aOwner)

    40 {

    41 }

    43 // static

    44 already_AddRefed<IDBFileHandle>

    45 IDBFileHandle::Create(IDBDatabase* aDatabase,

    46                       const nsAString& aName,

    47                       const nsAString& aType,

    48                       already_AddRefed<FileInfo> aFileInfo)

    49 {

    50   NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");

    52   nsRefPtr<FileInfo> fileInfo(aFileInfo);

    53   NS_ASSERTION(fileInfo, "Null pointer!");

    55   nsRefPtr<IDBFileHandle> newFile = new IDBFileHandle(aDatabase);

    57   newFile->mFileStorage = aDatabase;

    58   newFile->mName = aName;

    59   newFile->mType = aType;

    61   newFile->mFile = GetFileFor(fileInfo);

    62   NS_ENSURE_TRUE(newFile->mFile, nullptr);

    63   newFile->mFileName.AppendInt(fileInfo->Id());

    65   fileInfo.swap(newFile->mFileInfo);

    67   return newFile.forget();

    68 }

    70 already_AddRefed<nsISupports>

    71 IDBFileHandle::CreateStream(nsIFile* aFile, bool aReadOnly)

    72 {

    73   nsCOMPtr<nsIOfflineStorage> storage = do_QueryInterface(mFileStorage);

    74   NS_ASSERTION(storage, "This should always succeed!");

    76   PersistenceType persistenceType = storage->Type();

    77   const nsACString& group = storage->Group();

    78   const nsACString& origin = storage->Origin();

    80   nsCOMPtr<nsISupports> result;

    82   if (aReadOnly) {

    83     nsRefPtr<FileInputStream> stream =

    84       FileInputStream::Create(persistenceType, group, origin, aFile, -1, -1,

    85                               nsIFileInputStream::DEFER_OPEN);

    86     result = NS_ISUPPORTS_CAST(nsIFileInputStream*, stream);

    87   }

    88   else {

    89     nsRefPtr<FileStream> stream =

    90       FileStream::Create(persistenceType, group, origin, aFile, -1, -1,

    91                          nsIFileStream::DEFER_OPEN);

    92     result = NS_ISUPPORTS_CAST(nsIFileStream*, stream);

    93   }

    94   NS_ENSURE_TRUE(result, nullptr);

    96   return result.forget();

    97 }

    99 already_AddRefed<nsIDOMFile>

   100 IDBFileHandle::CreateFileObject(mozilla::dom::file::LockedFile* aLockedFile,

   101                                 uint32_t aFileSize)

   102 {

   103   nsCOMPtr<nsIDOMFile> file = new mozilla::dom::file::File(

   104     mName, mType, aFileSize, mFile, aLockedFile, mFileInfo);

   106   return file.forget();

   107 }

   109 // virtual

   110 JSObject*

   111 IDBFileHandle::WrapObject(JSContext* aCx)

   112 {

   113   return IDBFileHandleBinding::Wrap(aCx, this);

   114 }

   116 IDBDatabase*

   117 IDBFileHandle::Database()

   118 {

   119   NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");

   121   IDBDatabase* database = static_cast<IDBDatabase*>(mFileStorage.get());

   122   MOZ_ASSERT(database);

   124   return database;

   125 }

The Tor Browser / file revision