gecko-dev/dom/indexedDB/IDBRequest.h

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* ***** 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 Indexed Database.
 *
 * The Initial Developer of the Original Code is
 * The Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2010
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Shawn Wilsher <me@shawnwilsher.com>
 *   Ben Turner <bent.mozilla@gmail.com>
 *
 * 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 mozilla_dom_indexeddb_idbrequest_h__
#define mozilla_dom_indexeddb_idbrequest_h__

#include "mozilla/dom/indexedDB/IndexedDatabase.h"

#include "nsIIDBRequest.h"
#include "nsIIDBVersionChangeRequest.h"

#include "nsDOMEventTargetHelper.h"
#include "nsCycleCollectionParticipant.h"

class nsIScriptContext;
class nsPIDOMWindow;

BEGIN_INDEXEDDB_NAMESPACE

class AsyncConnectionHelper;
class IDBTransaction;

class IDBRequest : public nsDOMEventTargetHelper,
                   public nsIIDBRequest
{
public:
  NS_DECL_ISUPPORTS_INHERITED
  NS_DECL_NSIIDBREQUEST
  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(IDBRequest,
                                                         nsDOMEventTargetHelper)

  static
  already_AddRefed<IDBRequest> Create(nsISupports* aSource,
                                      nsIScriptContext* aScriptContext,
                                      nsPIDOMWindow* aOwner,
                                      IDBTransaction* aTransaction);

  // nsPIDOMEventTarget
  virtual nsresult PreHandleEvent(nsEventChainPreVisitor& aVisitor);

  nsISupports* Source()
  {
    return mSource;
  }

  void Reset();

  nsresult SetDone(AsyncConnectionHelper* aHelper);

  nsIScriptContext* ScriptContext()
  {
    NS_ASSERTION(mScriptContext, "This should never be null!");
    return mScriptContext;
  }

  nsPIDOMWindow* Owner()
  {
    NS_ASSERTION(mOwner, "This should never be null!");
    return mOwner;
  }

  virtual void RootResultVal();
  virtual void UnrootResultVal();

protected:
  IDBRequest();
  ~IDBRequest();

  nsCOMPtr<nsISupports> mSource;
  nsRefPtr<IDBTransaction> mTransaction;

  nsRefPtr<nsDOMEventListenerWrapper> mOnSuccessListener;
  nsRefPtr<nsDOMEventListenerWrapper> mOnErrorListener;

  jsval mResultVal;

  PRUint16 mErrorCode;
  bool mResultValRooted;
  bool mHaveResultOrErrorCode;
};

class IDBVersionChangeRequest : public IDBRequest,
                                public nsIIDBVersionChangeRequest
{
public:
  NS_DECL_ISUPPORTS_INHERITED
  NS_FORWARD_NSIIDBREQUEST(IDBRequest::)
  NS_DECL_NSIIDBVERSIONCHANGEREQUEST
  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(IDBVersionChangeRequest,
                                           IDBRequest)

  ~IDBVersionChangeRequest();

  static
  already_AddRefed<IDBVersionChangeRequest>
  Create(nsISupports* aSource,
         nsIScriptContext* aScriptContext,
         nsPIDOMWindow* aOwner,
         IDBTransaction* aTransaction);

  virtual void RootResultVal();
  virtual void UnrootResultVal();

protected:
  nsRefPtr<nsDOMEventListenerWrapper> mOnBlockedListener;
};

END_INDEXEDDB_NAMESPACE

#endif // mozilla_dom_indexeddb_idbrequest_h__