gecko/dom/indexedDB/FileSnapshot.cpp
2015-05-19 15:36:37 +01:00

163 lines
3.8 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=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 "MainThreadUtils.h"
#include "mozilla/Assertions.h"
#include "mozilla/dom/MetadataHelper.h"
#ifdef DEBUG
#include "nsXULAppAPI.h"
#endif
namespace mozilla {
namespace dom {
namespace indexedDB {
// Create as a stored file
BlobImplSnapshot::BlobImplSnapshot(const nsAString& aName,
const nsAString& aContentType,
MetadataParameters* aMetadataParams,
nsIFile* aFile,
IDBFileHandle* aFileHandle,
FileInfo* aFileInfo)
: BlobImplBase(aName,
aContentType,
aMetadataParams->Size(),
aMetadataParams->LastModified())
, mFile(aFile)
, mWholeFile(true)
{
AssertSanity();
MOZ_ASSERT(aMetadataParams);
MOZ_ASSERT(aMetadataParams->Size() != UINT64_MAX);
MOZ_ASSERT(aMetadataParams->LastModified() != INT64_MAX);
MOZ_ASSERT(aFile);
MOZ_ASSERT(aFileHandle);
MOZ_ASSERT(aFileInfo);
mFileInfos.AppendElement(aFileInfo);
mFileHandle =
do_GetWeakReference(NS_ISUPPORTS_CAST(EventTarget*, aFileHandle));
}
// Create slice
BlobImplSnapshot::BlobImplSnapshot(const BlobImplSnapshot* aOther,
uint64_t aStart,
uint64_t aLength,
const nsAString& aContentType)
: BlobImplBase(aContentType, aOther->mStart + aStart, aLength)
, mFile(aOther->mFile)
, mFileHandle(aOther->mFileHandle)
, mWholeFile(false)
{
AssertSanity();
MOZ_ASSERT(aOther);
FileInfo* fileInfo;
if (IndexedDatabaseManager::IsClosed()) {
fileInfo = aOther->GetFileInfo();
} else {
MutexAutoLock lock(IndexedDatabaseManager::FileMutex());
fileInfo = aOther->GetFileInfo();
}
mFileInfos.AppendElement(fileInfo);
}
BlobImplSnapshot::~BlobImplSnapshot()
{
}
#ifdef DEBUG
// static
void
BlobImplSnapshot::AssertSanity()
{
MOZ_ASSERT(XRE_GetProcessType() == GeckoProcessType_Default);
MOZ_ASSERT(NS_IsMainThread());
}
#endif // DEBUG
NS_IMPL_ISUPPORTS_INHERITED(BlobImplSnapshot, BlobImpl, PIBlobImplSnapshot)
void
BlobImplSnapshot::GetInternalStream(nsIInputStream** aStream,
ErrorResult& aRv)
{
AssertSanity();
nsCOMPtr<EventTarget> et = do_QueryReferent(mFileHandle);
nsRefPtr<IDBFileHandle> fileHandle = static_cast<IDBFileHandle*>(et.get());
if (!fileHandle) {
aRv.Throw(NS_ERROR_DOM_FILEHANDLE_INACTIVE_ERR);
return;
}
aRv = fileHandle->OpenInputStream(mWholeFile, mStart, mLength, aStream);
if (NS_WARN_IF(aRv.Failed())) {
return;
}
}
already_AddRefed<BlobImpl>
BlobImplSnapshot::CreateSlice(uint64_t aStart,
uint64_t aLength,
const nsAString& aContentType,
ErrorResult& aRv)
{
AssertSanity();
nsRefPtr<BlobImpl> impl =
new BlobImplSnapshot(this, aStart, aLength, aContentType);
return impl.forget();
}
void
BlobImplSnapshot::GetMozFullPathInternal(nsAString& aFilename,
ErrorResult& aRv)
{
AssertSanity();
MOZ_ASSERT(mIsFile);
aRv = mFile->GetPath(aFilename);
}
bool
BlobImplSnapshot::IsStoredFile() const
{
AssertSanity();
return true;
}
bool
BlobImplSnapshot::IsWholeFile() const
{
AssertSanity();
return mWholeFile;
}
bool
BlobImplSnapshot::IsSnapshot() const
{
AssertSanity();
return true;
}
} // namespace indexedDB
} // namespace dom
} // namespace mozilla