Mega Code Archive
Get Leading White Space Width
<![CDATA[
/*
* StandardUtilities.java - Various miscallaneous utility functions
* :tabSize=8:indentSize=8:noTabs=false:
* :folding=explicit:collapseFolds=1:
*
* Copyright (C) 1999, 2006 Matthieu Casanova, Slava Pestov
* Portions copyright (C) 2000 Richard S. Hall
* Portions copyright (C) 2001 Dirk Moebius
*
* 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.
*/
//{{{ Imports
import javax.swing.text.Segment;
import java.util.Comparator;
import java.util.Stack;
//}}}
/**
* Several tools that depends on JDK only.
*
* @author Matthieu Casanova
* @version $Id: StandardUtilities.java 12884 2008-06-23 18:17:08Z kpouer $
* @since 4.3pre5
*/
public class StandardUtilities
{
//{{{ getLeadingWhiteSpaceWidth() method
/**
* Returns the width of the leading white space in the specified
* string.
* @param str The string
* @param tabSize The tab size
*/
public static int getLeadingWhiteSpaceWidth(String str, int tabSize)
{
return getLeadingWhiteSpaceWidth((CharSequence)str, tabSize);
} //}}}
//{{{ getLeadingWhiteSpaceWidth() method
/**
* Returns the width of the leading white space in the specified
* string.
* @param str The string
* @param tabSize The tab size
* @since jEdit 4.3pre15
*/
public static int getLeadingWhiteSpaceWidth(CharSequence str, int tabSize)
{
int whitespace = 0;
loop: for(int i = 0; i < str.length(); i++)
{
switch(str.charAt(i))
{
case ' ':
whitespace++;
break;
case '\t':
whitespace += tabSize -
whitespace % tabSize;
break;
default:
break loop;
}
}
return whitespace;
} //}}}
}
]]>