зеркало из https://github.com/mozilla/gecko-dev.git
163 строки
3.9 KiB
C++
163 строки
3.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "FileSnapshot.h"
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#include "IDBFileHandle.h"
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#include "MainThreadUtils.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/dom/MetadataHelper.h"
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#ifdef DEBUG
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#include "nsXULAppAPI.h"
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#endif
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namespace mozilla {
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namespace dom {
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namespace indexedDB {
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// Create as a stored file
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BlobImplSnapshot::BlobImplSnapshot(const nsAString& aName,
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const nsAString& aContentType,
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MetadataParameters* aMetadataParams,
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nsIFile* aFile,
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IDBFileHandle* aFileHandle,
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FileInfo* aFileInfo)
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: BlobImplBase(aName,
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aContentType,
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aMetadataParams->Size(),
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aMetadataParams->LastModified())
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, mFile(aFile)
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, mWholeFile(true)
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{
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AssertSanity();
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MOZ_ASSERT(aMetadataParams);
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MOZ_ASSERT(aMetadataParams->Size() != UINT64_MAX);
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MOZ_ASSERT(aMetadataParams->LastModified() != INT64_MAX);
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MOZ_ASSERT(aFile);
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MOZ_ASSERT(aFileHandle);
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MOZ_ASSERT(aFileInfo);
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mFileInfos.AppendElement(aFileInfo);
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mFileHandle =
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do_GetWeakReference(NS_ISUPPORTS_CAST(EventTarget*, aFileHandle));
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}
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// Create slice
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BlobImplSnapshot::BlobImplSnapshot(const BlobImplSnapshot* aOther,
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uint64_t aStart,
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uint64_t aLength,
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const nsAString& aContentType)
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: BlobImplBase(aContentType, aOther->mStart + aStart, aLength)
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, mFile(aOther->mFile)
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, mFileHandle(aOther->mFileHandle)
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, mWholeFile(false)
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{
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AssertSanity();
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MOZ_ASSERT(aOther);
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FileInfo* fileInfo;
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if (IndexedDatabaseManager::IsClosed()) {
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fileInfo = aOther->GetFileInfo();
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} else {
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MutexAutoLock lock(IndexedDatabaseManager::FileMutex());
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fileInfo = aOther->GetFileInfo();
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}
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mFileInfos.AppendElement(fileInfo);
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}
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BlobImplSnapshot::~BlobImplSnapshot()
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{
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}
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#ifdef DEBUG
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// static
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void
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BlobImplSnapshot::AssertSanity()
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{
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MOZ_ASSERT(XRE_GetProcessType() == GeckoProcessType_Default);
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MOZ_ASSERT(NS_IsMainThread());
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}
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#endif // DEBUG
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NS_IMPL_ISUPPORTS_INHERITED(BlobImplSnapshot, BlobImpl, PIBlobImplSnapshot)
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void
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BlobImplSnapshot::GetInternalStream(nsIInputStream** aStream,
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ErrorResult& aRv)
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{
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AssertSanity();
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nsCOMPtr<EventTarget> et = do_QueryReferent(mFileHandle);
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nsRefPtr<IDBFileHandle> fileHandle = static_cast<IDBFileHandle*>(et.get());
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if (!fileHandle) {
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aRv.Throw(NS_ERROR_DOM_FILEHANDLE_INACTIVE_ERR);
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return;
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}
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aRv = fileHandle->OpenInputStream(mWholeFile, mStart, mLength, aStream);
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if (NS_WARN_IF(aRv.Failed())) {
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return;
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}
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}
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already_AddRefed<BlobImpl>
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BlobImplSnapshot::CreateSlice(uint64_t aStart,
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uint64_t aLength,
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const nsAString& aContentType,
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ErrorResult& aRv)
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{
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AssertSanity();
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nsRefPtr<BlobImpl> impl =
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new BlobImplSnapshot(this, aStart, aLength, aContentType);
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return impl.forget();
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}
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void
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BlobImplSnapshot::GetMozFullPathInternal(nsAString& aFilename,
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ErrorResult& aRv) const
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{
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AssertSanity();
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MOZ_ASSERT(mIsFile);
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aRv = mFile->GetPath(aFilename);
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}
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bool
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BlobImplSnapshot::IsStoredFile() const
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{
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AssertSanity();
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return true;
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}
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bool
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BlobImplSnapshot::IsWholeFile() const
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{
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AssertSanity();
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return mWholeFile;
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}
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bool
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BlobImplSnapshot::IsSnapshot() const
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{
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AssertSanity();
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return true;
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}
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} // namespace indexedDB
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} // namespace dom
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} // namespace mozilla
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