/*
GNU GENERAL LICENSE
Copyright (C) 2006 The Lobo Project. Copyright (C) 2014 - 2017 Lobo Evolution
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
verion 3 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 License for more details.
You should have received a copy of the GNU General Public
along with this program. If not, see <http://www.gnu.org/licenses/>.
Contact info: lobochief@users.sourceforge.net; ivan.difrancesco@yahoo.it
*/
package org.lobobrowser.w3c.html;
/**
* The public interface UndoManager.
*/
public interface UndoManager {
// UndoManager
/**
* Gets the length.
*
* @return the length
*/
int getLength();
/**
* Item.
*
* @param index
* the index
* @return the object
*/
Object item(int index);
/**
* Gets the position.
*
* @return the position
*/
int getPosition();
/**
* Adds the.
*
* @param data
* the data
* @param title
* the title
* @return the int
*/
int add(Object data, String title);
/**
* Removes the.
*
* @param index
* the index
*/
void remove(int index);
/**
* Clear undo.
*/
void clearUndo();
/**
* Clear redo.
*/
void clearRedo();
}