gecko-dev/dom/file/File.cpp

87 строки
2.5 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 "File.h"
#include "LockedFile.h"
USING_FILE_NAMESPACE
using mozilla::dom::indexedDB::IndexedDatabaseManager;
// Create slice
File::File(const File* aOther, uint64_t aStart, uint64_t aLength,
const nsAString& aContentType)
: nsDOMFileCC(aContentType, aOther->mStart + aStart, aLength),
mFile(aOther->mFile), mLockedFile(aOther->mLockedFile),
mWholeFile(false), mStoredFile(aOther->mStoredFile)
{
NS_ASSERTION(mFile, "Null file!");
NS_ASSERTION(mLockedFile, "Null locked file!");
if (mStoredFile) {
FileInfo* fileInfo;
if (IndexedDatabaseManager::IsClosed()) {
fileInfo = aOther->GetFileInfo();
}
else {
MutexAutoLock lock(IndexedDatabaseManager::FileMutex());
fileInfo = aOther->GetFileInfo();
}
mFileInfos.AppendElement(fileInfo);
}
}
NS_IMPL_CYCLE_COLLECTION_CLASS(File)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(File, nsDOMFileCC)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR_AMBIGUOUS(mLockedFile,
nsIDOMLockedFile)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(File, nsDOMFileCC)
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mLockedFile)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(File)
NS_INTERFACE_MAP_END_INHERITING(nsDOMFileCC)
NS_IMPL_ADDREF_INHERITED(File, nsDOMFileCC)
NS_IMPL_RELEASE_INHERITED(File, nsDOMFileCC)
NS_IMETHODIMP
File::GetInternalStream(nsIInputStream **aStream)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
nsresult rv = mLockedFile->OpenInputStream(mWholeFile, mStart, mLength,
aStream);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
already_AddRefed<nsIDOMBlob>
File::CreateSlice(uint64_t aStart, uint64_t aLength,
const nsAString& aContentType)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
nsCOMPtr<nsIDOMBlob> t =
new File(this, aStart, aLength, aContentType);
return t.forget();
}
NS_IMETHODIMP
File::GetMozFullPathInternal(nsAString &aFilename)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
NS_ASSERTION(mIsFile, "Should only be called on files");
return mFile->GetPath(aFilename);
}