gecko-dev/dom/indexedDB/FileSnapshot.cpp

110 строки
3.0 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 "FileSnapshot.h"
#include "IDBFileHandle.h"
#include "mozilla/Assertions.h"
#include "nsDebug.h"
namespace mozilla {
namespace dom {
namespace indexedDB {
NS_IMPL_ISUPPORTS_INHERITED0(FileImplSnapshot, DOMFileImpl)
// Create as a stored file
FileImplSnapshot::FileImplSnapshot(const nsAString& aName,
const nsAString& aContentType,
uint64_t aLength, nsIFile* aFile,
IDBFileHandle* aFileHandle,
FileInfo* aFileInfo)
: DOMFileImplBase(aName, aContentType, aLength),
mFile(aFile), mFileHandle(aFileHandle), mWholeFile(true)
{
MOZ_ASSERT(mFile, "Null file!");
MOZ_ASSERT(mFileHandle, "Null file handle!");
mFileInfos.AppendElement(aFileInfo);
}
// Create slice
FileImplSnapshot::FileImplSnapshot(const FileImplSnapshot* aOther,
uint64_t aStart, uint64_t aLength,
const nsAString& aContentType)
: DOMFileImplBase(aContentType, aOther->mStart + aStart, aLength),
mFile(aOther->mFile), mFileHandle(aOther->mFileHandle),
mWholeFile(false)
{
MOZ_ASSERT(mFile, "Null file!");
MOZ_ASSERT(mFileHandle, "Null file handle!");
FileInfo* fileInfo;
if (IndexedDatabaseManager::IsClosed()) {
fileInfo = aOther->GetFileInfo();
} else {
MutexAutoLock lock(IndexedDatabaseManager::FileMutex());
fileInfo = aOther->GetFileInfo();
}
mFileInfos.AppendElement(fileInfo);
}
FileImplSnapshot::~FileImplSnapshot()
{
}
void
FileImplSnapshot::Unlink()
{
FileImplSnapshot* tmp = this;
NS_IMPL_CYCLE_COLLECTION_UNLINK(mFileHandle);
}
void
FileImplSnapshot::Traverse(nsCycleCollectionTraversalCallback &cb)
{
FileImplSnapshot* tmp = this;
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mFileHandle);
}
nsresult
FileImplSnapshot::GetInternalStream(nsIInputStream** aStream)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
nsresult rv = mFileHandle->OpenInputStream(mWholeFile, mStart, mLength,
aStream);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
already_AddRefed<nsIDOMBlob>
FileImplSnapshot::CreateSlice(uint64_t aStart, uint64_t aLength,
const nsAString& aContentType)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
nsCOMPtr<nsIDOMBlob> t =
new DOMFile(new FileImplSnapshot(this, aStart, aLength, aContentType));
return t.forget();
}
nsresult
FileImplSnapshot::GetMozFullPathInternal(nsAString& aFilename)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
NS_ASSERTION(mIsFile, "Should only be called on files");
return mFile->GetPath(aFilename);
}
} // namespace indexedDB
} // namespace dom
} // namespace mozilla