net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpeclipse/xml/ui/internal/text/XMLWordFinder.java

   1 /*
   2  * Copyright (c) 2004 Widespace, OU and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     Igor Malinin - initial implementation
  10  *
  11  * $Id: XMLWordFinder.java,v 1.2 2006-10-21 23:14:13 pombredanne Exp $
  12  */
  13 package net.sourceforge.phpeclipse.xml.ui.internal.text;
  14
  15 import org.eclipse.jface.text.BadLocationException;
  16 import org.eclipse.jface.text.IDocument;
  17 import org.eclipse.jface.text.IRegion;
  18 import org.eclipse.jface.text.Region;
  19
  20 /**
  21  *
  22  *
  23  * @author Igor Malinin
  24  */
  25 public class XMLWordFinder {
  26         public static IRegion findWord(IDocument document, int offset) {
  27                 int length = document.getLength();
  28
  29                 try {
  30                         int pos = offset;
  31
  32                         while (pos >= 0) {
  33                                 if (!Character.isUnicodeIdentifierPart(document.getChar(pos))) {
  34                                         break;
  35                                 }
  36                                 --pos;
  37                         }
  38
  39                         int start = pos;
  40
  41                         pos = offset;
  42
  43                         while (pos < length) {
  44                                 if (!Character.isUnicodeIdentifierPart(document.getChar(pos))) {
  45                                         break;
  46                                 }
  47                                 ++pos;
  48                         }
  49
  50                         int end = pos;
  51
  52                         if (start == offset) {
  53                                 return new Region(start, end - start);
  54                         }
  55
  56                         return new Region(start + 1, end - start - 1);
  57                 } catch (BadLocationException x) {
  58                         return null;
  59                 }
  60         }
  61 }