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117 lines
4.4 KiB
C++
117 lines
4.4 KiB
C++
//* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla History System
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*
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* The Initial Developer of the Original Code is
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* Google Inc.
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* Portions created by the Initial Developer are Copyright (C) 2006
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Brett Wilson <brettw@gmail.com> (original author)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/**
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* This class handles expiration of history for nsNavHistory. There is a 1-1
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* mapping between nsNavHistory class and a nsNavHistoryExpire class, the
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* code is separated for better understandability.
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*/
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class mozIStorageConnection;
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class nsNavHistory;
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struct nsNavHistoryExpireRecord;
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class nsNavHistoryExpire
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{
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public:
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nsNavHistoryExpire(nsNavHistory* aHistory);
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~nsNavHistoryExpire();
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void OnAddURI(PRTime aNow);
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void OnDeleteURI();
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void OnQuit();
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nsresult ClearHistory();
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void OnExpirationChanged();
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protected:
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nsNavHistory* mHistory;
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// Number of partial expirations since last AddURI call.
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PRUint32 mSequentialRuns;
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nsCOMPtr<nsITimer> mTimer;
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PRBool mTimerSet;
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// Set when we try to expire something and find there is nothing to expire.
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// This short-curcuits the shutdown logic by indicating that there probably
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// isn't anything important we need to expire.
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PRBool mAnyEmptyRuns;
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// When we have found nothing to expire, we compute the time the next item
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// will expire. This is that time so we won't try to expire anything until
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// then. It is 0 when we don't need to wait to expire stuff.
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PRTime mNextExpirationTime;
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void ComputeNextExpirationTime(mozIStorageConnection* aConnection);
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// global statistics
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PRUint32 mAddCount;
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PRUint32 mExpiredItems;
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PRUint32 mExpireRuns;
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nsresult DoPartialExpiration();
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nsresult ExpireItems(PRUint32 aNumToExpire, PRBool* aKeepGoing);
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nsresult ExpireAnnotations(mozIStorageConnection* aConnection);
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// parts of ExpireItems
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nsresult FindVisits(PRTime aExpireThreshold, PRUint32 aNumToExpire,
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mozIStorageConnection* aConnection,
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nsTArray<nsNavHistoryExpireRecord>& aRecords);
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nsresult EraseVisits(mozIStorageConnection* aConnection,
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const nsTArray<nsNavHistoryExpireRecord>& aRecords);
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nsresult EraseHistory(mozIStorageConnection* aConnection,
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nsTArray<nsNavHistoryExpireRecord>& aRecords);
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nsresult EraseFavicons(mozIStorageConnection* aConnection,
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const nsTArray<nsNavHistoryExpireRecord>& aRecords);
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nsresult EraseAnnotations(mozIStorageConnection* aConnection,
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const nsTArray<nsNavHistoryExpireRecord>& aRecords);
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// paranoid checks
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nsresult ExpireHistoryParanoid(mozIStorageConnection* aConnection);
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nsresult ExpireFaviconsParanoid(mozIStorageConnection* aConnection);
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nsresult ExpireAnnotationsParanoid(mozIStorageConnection* aConnection);
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PRBool ExpireForDegenerateRuns();
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nsresult StartTimer(PRUint32 aMilleseconds);
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static void TimerCallback(nsITimer* aTimer, void* aClosure);
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PRTime GetExpirationTimeAgo();
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};
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