net.sourceforge.phpeclipse.xml.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 1.1 2004-09-02 18:28:03 jsurfer 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  *
  24  * @author Igor Malinin
  25  */
  26 public class XMLWordFinder {
  27         public static IRegion findWord(IDocument document, int offset) {
  28                 int length = document.getLength();
  29
  30                 try {
  31                         int pos = offset;
  32
  33                         while (pos >= 0) {
  34                                 if (!Character.isUnicodeIdentifierPart(document.getChar(pos))) {
  35                                         break;
  36                                 }
  37                                 --pos;
  38                         }
  39
  40                         int start = pos;
  41
  42                         pos = offset;
  43
  44                         while (pos < length) {
  45                                 if (!Character.isUnicodeIdentifierPart(document.getChar(pos))) {
  46                                         break;
  47                                 }
  48                                 ++pos;
  49                         }
  50
  51                         int end = pos;
  52
  53                         if (start == offset) {
  54                                 return new Region(start, end - start);
  55                         }
  56
  57                         return new Region(start + 1, end - start - 1);
  58                 } catch (BadLocationException x) {
  59                         return null;
  60                 }
  61         }
  62 }