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/* This file is part of the KDE project
*
* Copyright (C) 2000 Waldo Bastian <bastian@kde.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __khtml_pagecache_h__
#define __khtml_pagecache_h__
#include <qobject.h>
#include <qcstring.h>
#include <qvaluelist.h>
#include <qptrlist.h>
class KHTMLPageCachePrivate;
/**
* Singleton Object that handles a binary cache on top of
* the http cache management of kio.
*
* A limited number of HTML pages are stored in this cache. This
* cache is used for the history and operations like "view source".
* These operations always want to use the original document and
* don't want to fetch the data from the network again.
*
* It operates completely independent from the kio_http cache.
*/
class KHTMLPageCache : public QObject
{
Q_OBJECT
public:
/**
* static "constructor".
* @return returns a pointer to the cache, if it exists.
* creates a new cache otherwise.
*/
static KHTMLPageCache *self();
~KHTMLPageCache();
/**
* Create a new cache entry.
*
* @return a cache entry ID is returned.
*/
long createCacheEntry();
/**
* Add @p data to the cache entry with id @p id.
*/
void addData(long id, const QByteArray &data);
/**
* Signal end of data for the cache entry with id @p id.
* After calling this the entry is marked complete
*/
void endData(long id);
/**
* Cancel the entry.
*/
void cancelEntry(long id);
/**
* @return true when the cache entry with id @p is still valid,
* and at least some of the data is available for reading (the
* complete data may not yet be loaded)
*/
bool isValid(long id);
/**
* @return true when the cache entry with id @p is still valid,
* and the complete data is available for reading
*/
bool isComplete(long id);
/**
* Fetch data for cache entry @p id and send it to slot @p recvSlot
* in the object @p recvObj
*/
void fetchData(long id, QObject *recvObj, const char *recvSlot);
/**
* Cancel sending data to @p recvObj
*/
void cancelFetch(QObject *recvObj);
/**
* Save the data of cache entry @p id to the datastream @p str
*/
void saveData(long id, QDataStream *str);
private slots:
void sendData();
private:
KHTMLPageCache();
static KHTMLPageCache *_self;
KHTMLPageCachePrivate *d;
};
class KHTMLPageCacheDelivery : public QObject
{
friend class KHTMLPageCache;
Q_OBJECT
public:
KHTMLPageCacheDelivery(int _fd)
: fd(_fd) { }
~KHTMLPageCacheDelivery();
signals:
void emitData(const QByteArray &data);
public:
QObject *recvObj;
int fd;
};
#endif
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