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/* This file is part of the KDE libraries
Copyright (C) 2002 John Firebaugh <jfirebaugh@kde.org>
Copyright (C) 2001 Christoph Cullmann <cullmann@kde.org>
Copyright (C) 2001 Joseph Wenninger <jowenn@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 version 2 as published by the Free Software Foundation.
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 kate_undo_h
#define kate_undo_h
#include <tqptrlist.h>
#include <tqstring.h>
class KateDocument;
class KateUndo;
/**
* Class to manage a group of undo items
*/
class KateUndoGroup
{
public:
/**
* Constructor
* @param doc document to belong to
*/
KateUndoGroup (KateDocument *doc);
/**
* Destructor
*/
~KateUndoGroup ();
public:
/**
* Undo the contained undo items
*/
void undo ();
/**
* Redo the contained undo items
*/
void redo ();
public:
/**
* Types for undo items
*/
enum UndoType
{
editInsertText,
editRemoveText,
editWrapLine,
editUnWrapLine,
editInsertLine,
editRemoveLine,
editMarkLineAutoWrapped,
editInvalid
};
/**
* add an item to the group
* @param type undo item type
* @param line line affected
* @param col start column
* @param len length of change
* @param text text removed/inserted
*/
void addItem (KateUndoGroup::UndoType type, uint line, uint col, uint len, const TQString &text);
/**
* merge this group with an other
* @param newGroup group to merge into this one
* @param complex set if a complex undo
* @return success
*/
bool merge(KateUndoGroup* newGroup,bool complex);
/**
* set group as as savepoint. the next group will not merge with this one
*/
void safePoint (bool safePoint=true);
/**
* is this undogroup empty?
*/
bool isEmpty () const { return m_items.isEmpty(); }
private:
/**
* singleType
* @return the type if it's only one type, or editInvalid if it contains multiple types.
*/
KateUndoGroup::UndoType singleType();
/**
* are we only of this type ?
* @param type type to query
* @return we contain only the given type
*/
bool isOnlyType(KateUndoGroup::UndoType type);
/**
* add an undo item
* @param u item to add
*/
void addItem (KateUndo *u);
private:
/**
* Document we belong to
*/
KateDocument *m_doc;
/**
* list of items contained
*/
TQPtrList<KateUndo> m_items;
/**
* prohibit merging with the next group
*/
bool m_safePoint;
};
#endif
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