Mega Code Archive
Locates the start of the word at the specified position
<![CDATA[
/*
* TextUtilities.java - Utility functions used by the text area classes
* Copyright (C) 1999 Slava Pestov
*
* You may use and modify this package for any purpose. Redistribution is
* permitted, in both source and binary form, provided that this notice
* remains intact in all source distributions of this package.
*/
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
/**
* Class with several utility functions used by the text area component.
*
* @author Slava Pestov
* @version $Id$
*/
public class TextUtilities
{
/**
* Locates the start of the word at the specified position.
*
* @param line
* The text
* @param pos
* The position
*/
public static int findWordStart( String line, int pos, String noWordSep )
{
char ch = line.charAt( pos - 1 );
if( noWordSep == null )
noWordSep = "";
boolean selectNoLetter = ( !Character.isLetterOrDigit( ch ) && noWordSep.indexOf( ch ) == -1 );
int wordStart = 0;
for( int i = pos - 1; i >= 0; i-- )
{
ch = line.charAt( i );
if( selectNoLetter ^ ( !Character.isLetterOrDigit( ch ) && noWordSep.indexOf( ch ) == -1 ) )
{
wordStart = i + 1;
break;
}
}
return wordStart;
}
}
]]>