The Tor Browser / file comparison
comparison: dom/file/FileHandle.cpp
dom/file/FileHandle.cpp
- branch
- TOR_BUG_9701
- changeset 10
- ac0c01689b40
equal
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replaced
| -1:000000000000 | 0:c4ecf1cf33c2 |
|---|---|
| 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/. */ | |
| 6 | |
| 7 #include "FileHandle.h" | |
| 8 | |
| 9 #include "nsContentUtils.h" | |
| 10 #include "nsDOMClassInfoID.h" | |
| 11 #include "nsNetUtil.h" | |
| 12 | |
| 13 #include "nsIDOMFile.h" | |
| 14 #include "nsIFileStorage.h" | |
| 15 | |
| 16 #include "File.h" | |
| 17 #include "FileRequest.h" | |
| 18 #include "FileService.h" | |
| 19 #include "LockedFile.h" | |
| 20 #include "MetadataHelper.h" | |
| 21 #include "mozilla/dom/FileHandleBinding.h" | |
| 22 | |
| 23 using namespace mozilla; | |
| 24 using namespace mozilla::dom; | |
| 25 USING_FILE_NAMESPACE | |
| 26 | |
| 27 namespace { | |
| 28 | |
| 29 class GetFileHelper : public MetadataHelper | |
| 30 { | |
| 31 public: | |
| 32 GetFileHelper(LockedFile* aLockedFile, | |
| 33 FileRequest* aFileRequest, | |
| 34 MetadataParameters* aParams, | |
| 35 FileHandle* aFileHandle) | |
| 36 : MetadataHelper(aLockedFile, aFileRequest, aParams), | |
| 37 mFileHandle(aFileHandle) | |
| 38 { } | |
| 39 | |
| 40 virtual nsresult | |
| 41 GetSuccessResult(JSContext* aCx, | |
| 42 JS::MutableHandle<JS::Value> aVal) MOZ_OVERRIDE; | |
| 43 | |
| 44 virtual void | |
| 45 ReleaseObjects() MOZ_OVERRIDE | |
| 46 { | |
| 47 mFileHandle = nullptr; | |
| 48 | |
| 49 MetadataHelper::ReleaseObjects(); | |
| 50 } | |
| 51 | |
| 52 private: | |
| 53 nsRefPtr<FileHandle> mFileHandle; | |
| 54 }; | |
| 55 | |
| 56 } // anonymous namespace | |
| 57 | |
| 58 NS_IMPL_CYCLE_COLLECTION_INHERITED(FileHandle, DOMEventTargetHelper, | |
| 59 mFileStorage) | |
| 60 | |
| 61 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(FileHandle) | |
| 62 NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper) | |
| 63 | |
| 64 NS_IMPL_ADDREF_INHERITED(FileHandle, DOMEventTargetHelper) | |
| 65 NS_IMPL_RELEASE_INHERITED(FileHandle, DOMEventTargetHelper) | |
| 66 | |
| 67 // static | |
| 68 already_AddRefed<FileHandle> | |
| 69 FileHandle::Create(nsPIDOMWindow* aWindow, | |
| 70 nsIFileStorage* aFileStorage, | |
| 71 nsIFile* aFile) | |
| 72 { | |
| 73 MOZ_ASSERT(NS_IsMainThread(), "Wrong thread!"); | |
| 74 | |
| 75 nsRefPtr<FileHandle> newFileHandle = new FileHandle(aWindow); | |
| 76 | |
| 77 newFileHandle->mFileStorage = aFileStorage; | |
| 78 nsresult rv = aFile->GetLeafName(newFileHandle->mName); | |
| 79 if (NS_WARN_IF(NS_FAILED(rv))) { | |
| 80 return nullptr; | |
| 81 } | |
| 82 | |
| 83 newFileHandle->mFile = aFile; | |
| 84 newFileHandle->mFileName = newFileHandle->mName; | |
| 85 | |
| 86 return newFileHandle.forget(); | |
| 87 } | |
| 88 | |
| 89 // virtual | |
| 90 already_AddRefed<nsISupports> | |
| 91 FileHandle::CreateStream(nsIFile* aFile, bool aReadOnly) | |
| 92 { | |
| 93 nsresult rv; | |
| 94 | |
| 95 if (aReadOnly) { | |
| 96 nsCOMPtr<nsIInputStream> stream; | |
| 97 rv = NS_NewLocalFileInputStream(getter_AddRefs(stream), aFile, -1, -1, | |
| 98 nsIFileInputStream::DEFER_OPEN); | |
| 99 if (NS_WARN_IF(NS_FAILED(rv))) { | |
| 100 return nullptr; | |
| 101 } | |
| 102 return stream.forget(); | |
| 103 } | |
| 104 | |
| 105 nsCOMPtr<nsIFileStream> stream; | |
| 106 rv = NS_NewLocalFileStream(getter_AddRefs(stream), aFile, -1, -1, | |
| 107 nsIFileStream::DEFER_OPEN); | |
| 108 if (NS_WARN_IF(NS_FAILED(rv))) { | |
| 109 return nullptr; | |
| 110 } | |
| 111 return stream.forget(); | |
| 112 } | |
| 113 | |
| 114 // virtual | |
| 115 already_AddRefed<nsIDOMFile> | |
| 116 FileHandle::CreateFileObject(LockedFile* aLockedFile, uint32_t aFileSize) | |
| 117 { | |
| 118 nsCOMPtr<nsIDOMFile> file = | |
| 119 new File(mName, mType, aFileSize, mFile, aLockedFile); | |
| 120 | |
| 121 return file.forget(); | |
| 122 } | |
| 123 | |
| 124 // virtual | |
| 125 JSObject* | |
| 126 FileHandle::WrapObject(JSContext* aCx) | |
| 127 { | |
| 128 return FileHandleBinding::Wrap(aCx, this); | |
| 129 } | |
| 130 | |
| 131 already_AddRefed<LockedFile> | |
| 132 FileHandle::Open(FileMode aMode, ErrorResult& aError) | |
| 133 { | |
| 134 MOZ_ASSERT(NS_IsMainThread()); | |
| 135 | |
| 136 if (FileService::IsShuttingDown() || mFileStorage->IsShuttingDown()) { | |
| 137 aError.Throw(NS_ERROR_DOM_FILEHANDLE_UNKNOWN_ERR); | |
| 138 return nullptr; | |
| 139 } | |
| 140 | |
| 141 nsRefPtr<LockedFile> lockedFile = LockedFile::Create(this, aMode); | |
| 142 if (!lockedFile) { | |
| 143 aError.Throw(NS_ERROR_DOM_FILEHANDLE_UNKNOWN_ERR); | |
| 144 return nullptr; | |
| 145 } | |
| 146 | |
| 147 return lockedFile.forget(); | |
| 148 } | |
| 149 | |
| 150 already_AddRefed<DOMRequest> | |
| 151 FileHandle::GetFile(ErrorResult& aError) | |
| 152 { | |
| 153 MOZ_ASSERT(NS_IsMainThread()); | |
| 154 | |
| 155 // Do nothing if the window is closed | |
| 156 if (!GetOwner()) { | |
| 157 return nullptr; | |
| 158 } | |
| 159 | |
| 160 nsRefPtr<LockedFile> lockedFile = | |
| 161 LockedFile::Create(this, FileMode::Readonly, LockedFile::PARALLEL); | |
| 162 if (!lockedFile) { | |
| 163 aError.Throw(NS_ERROR_DOM_FILEHANDLE_UNKNOWN_ERR); | |
| 164 return nullptr; | |
| 165 } | |
| 166 | |
| 167 nsRefPtr<FileRequest> request = | |
| 168 FileRequest::Create(GetOwner(), lockedFile, /* aWrapAsDOMRequest */ true); | |
| 169 | |
| 170 nsRefPtr<MetadataParameters> params = new MetadataParameters(true, false); | |
| 171 | |
| 172 nsRefPtr<GetFileHelper> helper = | |
| 173 new GetFileHelper(lockedFile, request, params, this); | |
| 174 | |
| 175 nsresult rv = helper->Enqueue(); | |
| 176 if (NS_FAILED(rv)) { | |
| 177 aError.Throw(NS_ERROR_DOM_FILEHANDLE_UNKNOWN_ERR); | |
| 178 return nullptr; | |
| 179 } | |
| 180 | |
| 181 return request.forget(); | |
| 182 } | |
| 183 | |
| 184 nsresult | |
| 185 GetFileHelper::GetSuccessResult(JSContext* aCx, | |
| 186 JS::MutableHandle<JS::Value> aVal) | |
| 187 { | |
| 188 nsCOMPtr<nsIDOMFile> domFile = | |
| 189 mFileHandle->CreateFileObject(mLockedFile, mParams->Size()); | |
| 190 | |
| 191 nsresult rv = | |
| 192 nsContentUtils::WrapNative(aCx, domFile, &NS_GET_IID(nsIDOMFile), aVal); | |
| 193 NS_ENSURE_SUCCESS(rv, NS_ERROR_DOM_FILEHANDLE_UNKNOWN_ERR); | |
| 194 return NS_OK; | |
| 195 } |
