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/*
* kmail: KDE mail client
* Copyright (c) 1996-1998 Stefan Taferner <taferner@kde.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#ifndef kmmsglist_h
#define kmmsglist_h
#include "kmmsgbase.h"
#include <qmemarray.h>
/**
* @short An abstraction of an array of pointers to messages.
*
* This class represents an array of pointers to message objects. It
* autoresizes and can load a KMMsgDict object from its contents. It's
* a pure implementation detail of KMFolderIndex and should not be used by
* the layers above that.
*
* @author Stefan Taferner <taferner@kde.org>
*/
class KMMsgList: public QMemArray<KMMsgBase*>
{
public:
/** Constructor with optional initial size. */
KMMsgList(int initialSize=32);
/** Destructor also deletes all messages in the list. */
~KMMsgList();
/** Remove message at given index without deleting it.
Also removes from message dictionary. */
void remove(unsigned int idx);
/** Returns message at given index and removes it from the list.
Also removes from message dictionary. */
KMMsgBase* take(unsigned int idx);
/** Insert message at given index. Resizes the array if necessary.
If @p syncDict, also updates message dictionary. */
void insert(unsigned int idx, KMMsgBase* msg, bool syncDict = true);
/** Append given message after the last used message. Resizes the
array if necessary. Returns index of new position.
If @p syncDict, also updates message dictionary. */
unsigned int append(KMMsgBase* msg, bool syncDict = true);
/** Clear messages. If autoDelete is set (default) the messages are
deleted. The array is not resized. If @p syncDict, also updates
the message dictionary. */
void clear(bool autoDelete=TRUE, bool syncDict = false);
/** Resize array and initialize new elements if any. Returns
FALSE if memory cannot be allocated. */
bool resize(unsigned int size);
/** Clear the array and resize it to given size. Returns FALSE
if memory cannot be allocated. */
bool reset(unsigned int size);
/** Set message at given index. The array is resized if necessary. If
there is already a message at the given index this message is *not*
deleted. Does not sync the message dictionary. */
void set(unsigned int idx, KMMsgBase* msg);
/** Returns first unused index (index of last message plus one). */
unsigned int high() const { return mHigh; }
/** Number of messages in the array. */
unsigned int count() const { return mCount; }
protected:
/** Set mHigh to proper value */
void rethinkHigh();
unsigned int mHigh, mCount;
};
#endif /*kmmsglist_h*/
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