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/* -*- Mode: C; tab-width: 4; 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 nsConverterInputStream_h
#define nsConverterInputStream_h

#include "nsIInputStream.h"
#include "nsIConverterInputStream.h"
#include "nsIUnicharLineInputStream.h"
#include "nsTArray.h"
#include "nsAutoPtr.h"
#include "nsCOMPtr.h"
#include "nsReadLine.h"
#include "mozilla/Encoding.h"

#define NS_CONVERTERINPUTSTREAM_CONTRACTID "@mozilla.org/intl/converter-input-stream;1"

// {2BC2AD62-AD5D-4b7b-A9DB-F74AE203C527}
#define NS_CONVERTERINPUTSTREAM_CID \
  { 0x2bc2ad62, 0xad5d, 0x4b7b, \
   { 0xa9, 0xdb, 0xf7, 0x4a, 0xe2, 0x3, 0xc5, 0x27 } }



class nsConverterInputStream : public nsIConverterInputStream,
                               public nsIUnicharLineInputStream {

 public:
    NS_DECL_ISUPPORTS
    NS_DECL_NSIUNICHARINPUTSTREAM
    NS_DECL_NSIUNICHARLINEINPUTSTREAM
    NS_DECL_NSICONVERTERINPUTSTREAM

    nsConverterInputStream()
      : mLastErrorCode(NS_OK)
      , mLeftOverBytes(0)
      , mUnicharDataOffset(0)
      , mUnicharDataLength(0)
      , mErrorsAreFatal(false)
      , mLineBuffer(nullptr)
    {
    }

  private:
    virtual ~nsConverterInputStream() { Close(); }

    uint32_t Fill(nsresult *aErrorCode);

    mozilla::UniquePtr<mozilla::Decoder> mConverter;
    FallibleTArray<char> mByteData;
    FallibleTArray<char16_t> mUnicharData;
    nsCOMPtr<nsIInputStream> mInput;

    nsresult  mLastErrorCode;
    uint32_t  mLeftOverBytes;
    uint32_t  mUnicharDataOffset;
    uint32_t  mUnicharDataLength;
    bool mErrorsAreFatal;

    nsAutoPtr<nsLineBuffer<char16_t> > mLineBuffer;
};

#endif