net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/ui/text/JavaWordFinder.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2003 IBM Corporation 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  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package net.sourceforge.phpdt.internal.ui.text;
  12
  13
  14 import net.sourceforge.phpdt.internal.compiler.parser.Scanner;
  15
  16 import org.eclipse.jface.text.BadLocationException;
  17 import org.eclipse.jface.text.IDocument;
  18 import org.eclipse.jface.text.IRegion;
  19 import org.eclipse.jface.text.Region;
  20
  21 public class JavaWordFinder {
  22
  23         public static IRegion findWord(IDocument document, int offset) {
  24
  25                 int start= -1;
  26                 int end= -1;
  27
  28
  29                 try {
  30
  31                         int pos= offset;
  32                         char c;
  33
  34                         while (pos >= 0) {
  35                                 c= document.getChar(pos);
  36                                 if (!Scanner.isPHPIdentifierPart(c))
  37                                         break;
  38                                 --pos;
  39                         }
  40
  41                         start= pos;
  42
  43                         pos= offset;
  44                         int length= document.getLength();
  45
  46                         while (pos < length) {
  47                                 c= document.getChar(pos);
  48                                 if (!Scanner.isPHPIdentifierPart(c))
  49                                         break;
  50                                 ++pos;
  51                         }
  52
  53                         end= pos;
  54
  55                 } catch (BadLocationException x) {
  56                 }
  57
  58                 if (start > -1 && end > -1) {
  59                         if (start == offset && end == offset)
  60                                 return new Region(offset, 0);
  61                         else if (start == offset)
  62                                 return new Region(start, end - start);
  63                         else
  64                                 return new Region(start + 1, end - start - 1);
  65                 }
  66
  67                 return null;
  68         }
  69 }