/*
* ExplicitFoldHandler.java - Explicit fold handler
* :tabSize=4:indentSize=4:noTabs=false:
* :folding=explicit:collapseFolds=1:
*
* Copyright (C) 2001 Slava Pestov
*
* 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
package org.gjt.sp.jedit.buffer;
import javax.swing.text.Segment;
/**
* A fold handler that folds lines based on markers ("{{{" and "}}}")
* embedded in the text.
*
* @author Slava Pestov
* @version $Id: ExplicitFoldHandler.java 21831 2012-06-18 22:54:17Z ezust $
* @since jEdit 4.0pre1
*/
public class ExplicitFoldHandler extends FoldHandler
{
//{{{ ExplicitFoldHandler constructor
public ExplicitFoldHandler()
{
super("explicit");
} //}}}
//{{{ getFoldLevel() method
/**
* Returns the fold level of the specified line.
* @param buffer The buffer in question
* @param lineIndex The line index
* @param seg A segment the fold handler can use to obtain any
* text from the buffer, if necessary
* @return The fold level of the specified line
* @since jEdit 4.0pre1
*/
public int getFoldLevel(JEditBuffer buffer, int lineIndex, Segment seg)
{
if(lineIndex == 0)
return 0;
else
{
int foldLevel = buffer.getFoldLevel(lineIndex - 1);
buffer.getLineText(lineIndex - 1,seg);
int offset = seg.offset;
int count = seg.count;
int openingBrackets = 0, closingBrackets = 0;
for(int i = 0; i < count; i++)
{
switch(seg.array[offset + i])
{
case '{':
closingBrackets = 0;
openingBrackets++;
if(openingBrackets == 3)
{
foldLevel++;
openingBrackets = 0;
}
break;
case '}':
openingBrackets = 0;
closingBrackets++;
if(closingBrackets == 3)
{
if(foldLevel > 0)
foldLevel--;
closingBrackets = 0;
}
break;
default:
closingBrackets = openingBrackets = 0;
break;
}
}
return foldLevel;
}
} //}}}
}