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

   1 /*
   2  * Copyright (c) 2002-2004 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 contribution
  10  *
  11  * $Id: XMLTagRule.java,v 1.2 2006-10-21 23:14:13 pombredanne Exp $
  12  */
  13
  14 package net.sourceforge.phpeclipse.xml.ui.internal.text;
  15
  16 import org.eclipse.jface.text.rules.ICharacterScanner;
  17 import org.eclipse.jface.text.rules.IRule;
  18 import org.eclipse.jface.text.rules.IToken;
  19 import org.eclipse.jface.text.rules.Token;
  20
  21 /**
  22  * Rule detecting XML tag brackets and name.
  23  *
  24  * @author Igor Malinin
  25  */
  26 public class XMLTagRule implements IRule {
  27
  28         private IToken token;
  29
  30         public XMLTagRule(IToken token) {
  31                 this.token = token;
  32         }
  33
  34         public IToken evaluate(ICharacterScanner scanner) {
  35                 int ch = scanner.read();
  36                 if (ch == '>') {
  37                         return token;
  38                 }
  39                 if (ch == '/') {
  40                         ch = scanner.read();
  41                         if (ch == '>') {
  42                                 return token;
  43                         }
  44
  45                         scanner.unread();
  46                         scanner.unread();
  47                         return Token.UNDEFINED;
  48                 }
  49                 if (ch == '<') {
  50                         ch = scanner.read();
  51                         if (ch == '/') {
  52                                 ch = scanner.read();
  53                         }
  54                         loop: while (true) {
  55                                 switch (ch) {
  56                                 case ICharacterScanner.EOF:
  57                                 case 0x09:
  58                                 case 0x0A:
  59                                 case 0x0D:
  60                                 case 0x20:
  61                                         break loop;
  62                                 }
  63
  64                                 ch = scanner.read();
  65                         }
  66
  67                         scanner.unread();
  68                         return token;
  69                 }
  70                 scanner.unread();
  71                 return Token.UNDEFINED;
  72         }
  73 }