/*
* Copyright (C) 2010 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.wikbook.text;
/**
* @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
* @version $Revision$
*/
public class Clip
{
public static Clip get(Position from, Position to)
{
return new Clip(from, to);
}
public static Clip get(int fromLine, int fromColumn, int toLine, int toColumn)
{
return new Clip(Position.get(fromLine, fromColumn), Position.get(toLine, toColumn));
}
/** . */
private final Position from;
/** . */
private final Position to;
private Clip(Position from, Position to)
{
if (from == null)
{
throw new NullPointerException();
}
if (to == null)
{
throw new NullPointerException();
}
this.from = from;
this.to = to;
}
public Position getRelative(Position absolute)
{
if (absolute == null)
{
throw new NullPointerException();
}
if (contains(absolute))
{
return Position.get(absolute.line - from.line, absolute.column);
}
else
{
return null;
}
}
public boolean contains(Position position)
{
if (position == null)
{
throw new NullPointerException();
}
if (position.line < from.line || position.line > to.line)
{
return false;
}
else if (position.line == from.line)
{
return position.column >= from.column;
}
else if (position.line == to.line)
{
return position.column < to.column;
}
else
{
return true;
}
}
public Position getFrom()
{
return from;
}
public Position getTo()
{
return to;
}
}