gecko-dev/dom/file/EmptyBlobImpl.h

54 строки
1.4 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/. */
#ifndef mozilla_dom_EmptyBlobImpl_h
#define mozilla_dom_EmptyBlobImpl_h
#include "BaseBlobImpl.h"
namespace mozilla {
namespace dom {
class EmptyBlobImpl final : public BaseBlobImpl
{
public:
NS_INLINE_DECL_REFCOUNTING_INHERITED(EmptyBlobImpl, BaseBlobImpl)
explicit EmptyBlobImpl(const nsAString& aContentType)
: BaseBlobImpl(aContentType, 0 /* aLength */)
{
mImmutable = true;
}
EmptyBlobImpl(const nsAString& aName,
const nsAString& aContentType,
int64_t aLastModifiedDate)
: BaseBlobImpl(aName, aContentType, 0, aLastModifiedDate)
{
mImmutable = true;
}
virtual void CreateInputStream(nsIInputStream** aStream,
ErrorResult& aRv) override;
virtual already_AddRefed<BlobImpl>
CreateSlice(uint64_t aStart, uint64_t aLength,
const nsAString& aContentType, ErrorResult& aRv) override;
virtual bool IsMemoryFile() const override
{
return true;
}
private:
~EmptyBlobImpl() {}
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_EmptyBlobImpl_h