gecko-dev/uriloader/prefetch/nsPrefetchService.h

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/* ***** 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.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 2002
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Darin Fisher <darin@netscape.com> (original author)
*
* 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 nsPrefetchService_h__
#define nsPrefetchService_h__
#include "nsCPrefetchService.h"
#include "nsIObserver.h"
#include "nsIInterfaceRequestor.h"
#include "nsIChannelEventSink.h"
#include "nsIWebProgressListener.h"
#include "nsIStreamListener.h"
#include "nsIChannel.h"
#include "nsIURI.h"
#include "nsIDOMDocument.h"
#include "nsIDOMLoadStatus.h"
#include "nsWeakReference.h"
#include "nsCOMPtr.h"
#include "nsAutoPtr.h"
class nsPrefetchService;
class nsPrefetchListener;
class nsPrefetchNode;
//-----------------------------------------------------------------------------
// nsPrefetchService
//-----------------------------------------------------------------------------
class nsPrefetchService : public nsIPrefetchService
, public nsIWebProgressListener
, public nsIObserver
, public nsSupportsWeakReference
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIPREFETCHSERVICE
NS_DECL_NSIWEBPROGRESSLISTENER
NS_DECL_NSIOBSERVER
nsPrefetchService();
nsresult Init();
void ProcessNextURI();
nsPrefetchNode *GetCurrentNode() { return mCurrentNode.get(); }
nsPrefetchNode *GetQueueHead() { return mQueueHead; }
void NotifyLoadRequested(nsPrefetchNode *node);
void NotifyLoadCompleted(nsPrefetchNode *node);
private:
~nsPrefetchService();
nsresult Prefetch(nsIURI *aURI,
nsIURI *aReferrerURI,
nsIDOMNode *aSource,
PRBool aExplicit);
void AddProgressListener();
void RemoveProgressListener();
nsresult EnqueueURI(nsIURI *aURI, nsIURI *aReferrerURI,
nsIDOMNode *aSource, nsPrefetchNode **node);
nsresult EnqueueNode(nsPrefetchNode *node);
nsresult DequeueNode(nsPrefetchNode **node);
void EmptyQueue();
void StartPrefetching();
void StopPrefetching();
nsPrefetchNode *mQueueHead;
nsPrefetchNode *mQueueTail;
nsRefPtr<nsPrefetchNode> mCurrentNode;
PRInt32 mStopCount;
// true if pending document loads have ever reached zero.
PRInt32 mHaveProcessed;
PRBool mDisabled;
};
//-----------------------------------------------------------------------------
// nsPrefetchNode
//-----------------------------------------------------------------------------
class nsPrefetchNode : public nsIDOMLoadStatus
, public nsIStreamListener
, public nsIInterfaceRequestor
, public nsIChannelEventSink
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIDOMLOADSTATUS
NS_DECL_NSIREQUESTOBSERVER
NS_DECL_NSISTREAMLISTENER
NS_DECL_NSIINTERFACEREQUESTOR
NS_DECL_NSICHANNELEVENTSINK
nsPrefetchNode(nsPrefetchService *aPrefetchService,
nsIURI *aURI,
nsIURI *aReferrerURI,
nsIDOMNode *aSource);
~nsPrefetchNode() {}
nsresult OpenChannel();
nsresult CancelChannel(nsresult error);
nsPrefetchNode *mNext;
nsCOMPtr<nsIURI> mURI;
nsCOMPtr<nsIURI> mReferrerURI;
nsCOMPtr<nsIWeakReference> mSource;
private:
nsRefPtr<nsPrefetchService> mService;
nsCOMPtr<nsIChannel> mChannel;
PRUint16 mState;
PRInt32 mBytesRead;
};
#endif // !nsPrefetchService_h__