Get Leading White Space Width : TextPane « Swing JFC « Java






Get Leading White Space Width

   
/*
 * 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;
  } //}}}

}

   
    
    
  








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