net.sourceforge.phpeclipse.smarty.ui/src/net/sourceforge/phpdt/smarty/ui/internal/text/SmartyTagRule.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: SmartyTagRule.java,v 1.3 2006-10-21 23:19:32 pombredanne Exp $
  12  */
  13
  14 package net.sourceforge.phpdt.smarty.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 smarty tags
  23  */
  24 public class SmartyTagRule implements IRule {
  25
  26         private IToken token;
  27
  28         public SmartyTagRule(IToken token) {
  29                 this.token = token;
  30         }
  31
  32         public IToken evaluate(ICharacterScanner scanner) {
  33                 int ch = scanner.read();
  34                 if (ch == '}') {
  35                         return token;
  36                 }
  37                 if (ch == '/') {
  38                         ch = scanner.read();
  39                         if (ch == '}') {
  40                                 return token;
  41                         }
  42
  43                         scanner.unread();
  44                         scanner.unread();
  45                         return Token.UNDEFINED;
  46                 }
  47                 if (ch == '{') {
  48                         ch = scanner.read();
  49                         if (ch == '/') {
  50                                 ch = scanner.read();
  51                         }
  52                         loop: while (true) {
  53                                 switch (ch) {
  54                                 case ICharacterScanner.EOF:
  55                                 case 0x09:
  56                                 case 0x0A:
  57                                 case 0x0D:
  58                                 case 0x20:
  59                                         scanner.unread();
  60                                         break loop;
  61                                 case '}':
  62                                         break loop;
  63                                 }
  64
  65                                 ch = scanner.read();
  66                         }
  67                         return token;
  68                 }
  69                 scanner.unread();
  70                 return Token.UNDEFINED;
  71         }
  72 }