PageRenderTime 160ms CodeModel.GetById 152ms app.highlight 5ms RepoModel.GetById 1ms app.codeStats 0ms

/jEdit/tags/jedit-4-1-pre5/org/gjt/sp/jedit/buffer/ExplicitFoldHandler.java

#
Java | 101 lines | 53 code | 8 blank | 40 comment | 8 complexity | 0eba3d4159c2f648e05256e1823a5eaf MD5 | raw file
  1/*
  2 * ExplicitFoldHandler.java - Explicit fold handler
  3 * :tabSize=8:indentSize=8:noTabs=false:
  4 * :folding=explicit:collapseFolds=1:
  5 *
  6 * Copyright (C) 2001 Slava Pestov
  7 *
  8 * This program is free software; you can redistribute it and/or
  9 * modify it under the terms of the GNU General Public License
 10 * as published by the Free Software Foundation; either version 2
 11 * of the License, or any later version.
 12 *
 13 * This program is distributed in the hope that it will be useful,
 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 16 * GNU General Public License for more details.
 17 *
 18 * You should have received a copy of the GNU General Public License
 19 * along with this program; if not, write to the Free Software
 20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 21 */
 22
 23package org.gjt.sp.jedit.buffer;
 24
 25import javax.swing.text.Segment;
 26import org.gjt.sp.jedit.Buffer;
 27
 28/**
 29 * A fold handler that folds lines based markers embedded in the text.
 30 * ("{{{"
 31 * and "}}}").
 32 * @author Slava Pestov
 33 * @version $Id: ExplicitFoldHandler.java 4117 2002-03-28 04:08:42Z spestov $
 34 * @since jEdit 4.0pre1
 35 */
 36public class ExplicitFoldHandler extends FoldHandler
 37{
 38	//{{{ ExplicitFoldHandler constructor
 39	public ExplicitFoldHandler()
 40	{
 41		super("explicit");
 42	} //}}}
 43
 44	//{{{ getFoldLevel() method
 45	/**
 46	 * Returns the fold level of the specified line.
 47	 * @param buffer The buffer in question
 48	 * @param lineIndex The line index
 49	 * @param seg A segment the fold handler can use to obtain any
 50	 * text from the buffer, if necessary
 51	 * @return The fold level of the specified line
 52	 * @since jEdit 4.0pre1
 53	 */
 54	public int getFoldLevel(Buffer buffer, int lineIndex, Segment seg)
 55	{
 56		if(lineIndex == 0)
 57			return 0;
 58		else
 59		{
 60			int tabSize = buffer.getTabSize();
 61			int foldLevel = buffer.getFoldLevel(lineIndex - 1);
 62
 63			buffer.getLineText(lineIndex - 1,seg);
 64
 65			int offset = seg.offset;
 66			int count = seg.count;
 67
 68			int openingBrackets = 0, closingBrackets = 0;
 69			for(int i = 0; i < count; i++)
 70			{
 71				switch(seg.array[offset + i])
 72				{
 73				case '{':
 74					closingBrackets = 0;
 75					openingBrackets++;
 76					if(openingBrackets == 3)
 77					{
 78						foldLevel += tabSize;
 79						openingBrackets = 0;
 80					}
 81					break;
 82				case '}':
 83					openingBrackets = 0;
 84					closingBrackets++;
 85					if(closingBrackets == 3)
 86					{
 87						if(foldLevel >= tabSize)
 88							foldLevel -= tabSize;
 89						closingBrackets = 0;
 90					}
 91					break;
 92				default:
 93					closingBrackets = openingBrackets = 0;
 94					break;
 95				}
 96			}
 97
 98			return foldLevel;
 99		}
100	} //}}}
101}