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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 * The Original Code is mozilla.org code.
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 * Contributor(s):
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 * ***** END LICENSE BLOCK ***** */

#ifndef nsXMLHttpRequest_h__
#define nsXMLHttpRequest_h__

#include "nsIXMLHttpRequest.h"
#include "nsISupportsUtils.h"
#include "nsCOMPtr.h"
#include "nsString.h"
#include "nsIDOMLoadListener.h"
#include "nsIDOMEventTarget.h"
#include "nsIDOMDocument.h"
#include "nsIURI.h"
#include "nsIHttpChannel.h"
#include "nsIDocument.h"
#include "nsIStreamListener.h"
#include "nsIEventQueueService.h"
#include "nsWeakReference.h"
#include "nsWeakPtr.h"
#include "jsapi.h"
#include "nsIScriptContext.h"
#include "nsIChannelEventSink.h"
#include "nsIInterfaceRequestor.h"
#include "nsIHttpHeaderVisitor.h"
#include "nsIProgressEventSink.h"
#include "nsJSUtils.h"
#include "nsTArray.h"
#include "nsIDOMGCParticipant.h"
#include "nsIJSNativeInitializer.h"
#include "nsPIDOMWindow.h"
#include "nsIDOMLSProgressEvent.h"

class nsILoadGroup;

class nsXMLHttpRequest : public nsIXMLHttpRequest,
                         public nsIJSXMLHttpRequest,
                         public nsIDOMLoadListener,
                         public nsIDOMEventTarget,
                         public nsIStreamListener,
                         public nsIChannelEventSink,
                         public nsIProgressEventSink,
                         public nsIInterfaceRequestor,
                         public nsIDOMGCParticipant,
                         public nsSupportsWeakReference,
                         public nsIJSNativeInitializer_MOZILLA_1_8_BRANCH
  virtual ~nsXMLHttpRequest();


  // nsIXMLHttpRequest

  // nsIJSXMLHttpRequest

  // nsIDOMEventTarget

  // nsIDOMEventListener

  // nsIDOMLoadListener
  NS_IMETHOD Load(nsIDOMEvent* aEvent);
  NS_IMETHOD BeforeUnload(nsIDOMEvent* aEvent);
  NS_IMETHOD Unload(nsIDOMEvent* aEvent);
  NS_IMETHOD Abort(nsIDOMEvent* aEvent);
  NS_IMETHOD Error(nsIDOMEvent* aEvent);

  // nsIStreamListener

  // nsIRequestObserver

  // nsIChannelEventSink

  // nsIProgressEventSink

  // nsIInterfaceRequestor

  // nsIJSNativeInitializer
  NS_IMETHOD Initialize(nsISupports* aOwner, JSContext* cx, JSObject* obj,
                       PRUint32 argc, jsval* argv);

  // This is called by the factory constructor.
  nsresult Init();

  // nsIDOMGCParticipant
  virtual nsIDOMGCParticipant* GetSCCIndex();
  virtual void AppendReachableList(nsCOMArray<nsIDOMGCParticipant>& aArray);

  typedef nsMarkedJSFunctionHolder<nsIDOMEventListener> ListenerHolder;

  nsresult GetStreamForWString(const PRUnichar* aStr,
                               PRInt32 aLength,
                               nsIInputStream** aStream);
  nsresult DetectCharset(nsACString& aCharset);
  nsresult ConvertBodyToText(nsAString& aOutBuffer);
  static NS_METHOD StreamReaderFunc(nsIInputStream* in,
                void* closure,
                const char* fromRawSegment,
                PRUint32 toOffset,
                PRUint32 count,
                PRUint32 *writeCount);
  // Change the state of the object with this. The broadcast argument
  // determines if the onreadystatechange listener should be called.
  // If aClearEventListeners is true, ChangeState will take refs to
  // any event listeners it needs and call ClearEventListeners before
  // making any HandleEvent() calls that could change the listener
  // values.
  nsresult ChangeState(PRUint32 aState, PRBool aBroadcast = PR_TRUE,
                       PRBool aClearEventListeners = PR_FALSE);
  nsresult RequestCompleted();
  nsresult GetLoadGroup(nsILoadGroup **aLoadGroup);
  nsIURI *GetBaseURI();
  nsresult CreateEvent(nsEvent* event, nsIDOMEvent** domevent);
  void NotifyEventListeners(nsIDOMEventListener* aHandler,
                            const nsCOMArray<nsIDOMEventListener>* aListeners,
                            nsIDOMEvent* aEvent);
  void ClearEventListeners();
  already_AddRefed<nsIHttpChannel> GetCurrentHttpChannel();

  nsresult CheckInnerWindowCorrectness()
    if (mOwner) {
      nsCOMPtr<nsPIDOMWindow> win = do_QueryReferent(mOwner);
      NS_ASSERTION(win->IsInnerWindow(), "Should have inner window here!\n");
      nsPIDOMWindow* outer = win->GetOuterWindow();
      if (!outer || outer->GetCurrentInnerWindow() != win) {
        return NS_ERROR_FAILURE;
    return NS_OK;

  nsCOMPtr<nsISupports> mContext;
  nsCOMPtr<nsIPrincipal> mPrincipal;
  nsCOMPtr<nsIChannel> mChannel;
  nsCOMPtr<nsIRequest> mReadRequest;
  nsCOMPtr<nsIDOMDocument> mDocument;

  nsTArray<ListenerHolder*> mLoadEventListeners;
  nsTArray<ListenerHolder*> mErrorEventListeners;
  nsCOMPtr<nsIScriptContext> mScriptContext;
  nsWeakPtr mOwner; // Inner window.

  nsMarkedJSFunctionHolder<nsIDOMEventListener> mOnLoadListener;
  nsMarkedJSFunctionHolder<nsIDOMEventListener> mOnErrorListener;
  nsMarkedJSFunctionHolder<nsIDOMEventListener> mOnProgressListener;

  nsMarkedJSFunctionHolder<nsIOnReadyStateChangeHandler> mOnReadystatechangeListener;

  nsCOMPtr<nsIStreamListener> mXMLParserStreamListener;
  nsCOMPtr<nsIEventQueueService> mEventQService;

  // used to implement getAllResponseHeaders()
  class nsHeaderVisitor : public nsIHttpHeaderVisitor {
    nsHeaderVisitor() { }
    virtual ~nsHeaderVisitor() {}
    const nsACString &Headers() { return mHeaders; }
    nsCString mHeaders;

  nsCString mResponseBody;

  nsCString mOverrideMimeType;

   * The notification callbacks the channel had when Send() was
   * called.  We want to forward things here as needed.
  nsCOMPtr<nsIInterfaceRequestor> mNotificationCallbacks;
   * Sink interfaces that we implement that mNotificationCallbacks may
   * want to also be notified for.  These are inited lazily if we're
   * asked for the relevant interface.
  nsCOMPtr<nsIChannelEventSink> mChannelEventSink;
  nsCOMPtr<nsIProgressEventSink> mProgressEventSink;

  PRUint32 mState;

// helper class to expose a progress DOM Event

class nsXMLHttpProgressEvent : public nsIDOMLSProgressEvent
  nsXMLHttpProgressEvent(nsIDOMEvent * aInner, PRUint64 aCurrentProgress, PRUint64 aMaxProgress);
  virtual ~nsXMLHttpProgressEvent();


  nsCOMPtr<nsIDOMEvent> mInner;
  PRUint64 mCurProgress;
  PRUint64 mMaxProgress;


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