/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* 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 nsIncrementalStreamLoader_h__

#define nsIncrementalStreamLoader_h__

#include "nsIThreadRetargetableStreamListener.h"

#include "nsIIncrementalStreamLoader.h"

#include "nsCOMPtr.h"

#include "mozilla/Attributes.h"

#include "mozilla/Vector.h"

class nsIRequest;

class nsIncrementalStreamLoader final : public nsIIncrementalStreamLoader

                                      , public nsIThreadRetargetableStreamListener

{

public:

  NS_DECL_THREADSAFE_ISUPPORTS

  NS_DECL_NSIINCREMENTALSTREAMLOADER

  NS_DECL_NSIREQUESTOBSERVER

  NS_DECL_NSISTREAMLISTENER

  NS_DECL_NSITHREADRETARGETABLESTREAMLISTENER

  nsIncrementalStreamLoader();

  static nsresult

  Create(nsISupports *aOuter, REFNSIID aIID, void **aResult);

protected:

  ~nsIncrementalStreamLoader() = default;

  static nsresult WriteSegmentFun(nsIInputStream *, void *, const char *,

                                  uint32_t, uint32_t, uint32_t *);

  // Utility method to free mData, if present, and update other state to

  // reflect that no data has been allocated.

  void ReleaseData();

  nsCOMPtr<nsIIncrementalStreamLoaderObserver> mObserver;

  nsCOMPtr<nsISupports>             mContext;  // the observer's context

  nsCOMPtr<nsIRequest>              mRequest;

  // Buffer to accumulate incoming data. We preallocate if contentSize is

  // available.

  mozilla::Vector<uint8_t, 0> mData;

  // Number of consumed bytes from the mData.

  size_t  mBytesConsumed;

};

#endif // nsIncrementalStreamLoader_h__