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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2006 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13
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131
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14
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15 import dwtx.jface.text.rules.FastPartitioner; // packageimport
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16 import dwtx.jface.text.rules.ITokenScanner; // packageimport
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17 import dwtx.jface.text.rules.Token; // packageimport
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18 import dwtx.jface.text.rules.RuleBasedScanner; // packageimport
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19 import dwtx.jface.text.rules.EndOfLineRule; // packageimport
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20 import dwtx.jface.text.rules.WordRule; // packageimport
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21 import dwtx.jface.text.rules.WordPatternRule; // packageimport
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22 import dwtx.jface.text.rules.IPredicateRule; // packageimport
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23 import dwtx.jface.text.rules.DefaultPartitioner; // packageimport
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24 import dwtx.jface.text.rules.NumberRule; // packageimport
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25 import dwtx.jface.text.rules.SingleLineRule; // packageimport
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26 import dwtx.jface.text.rules.PatternRule; // packageimport
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27 import dwtx.jface.text.rules.IWordDetector; // packageimport
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28 import dwtx.jface.text.rules.RuleBasedDamagerRepairer; // packageimport
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29 import dwtx.jface.text.rules.ICharacterScanner; // packageimport
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30 import dwtx.jface.text.rules.IRule; // packageimport
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31 import dwtx.jface.text.rules.DefaultDamagerRepairer; // packageimport
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32 import dwtx.jface.text.rules.IToken; // packageimport
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33 import dwtx.jface.text.rules.IPartitionTokenScanner; // packageimport
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34 import dwtx.jface.text.rules.MultiLineRule; // packageimport
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35 import dwtx.jface.text.rules.RuleBasedPartitioner; // packageimport
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36 import dwtx.jface.text.rules.RuleBasedPartitionScanner; // packageimport
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37 import dwtx.jface.text.rules.BufferedRuleBasedScanner; // packageimport
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38 import dwtx.jface.text.rules.IWhitespaceDetector; // packageimport
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39
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129
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40 module dwtx.jface.text.rules.WhitespaceRule;
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41
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42 import dwt.dwthelper.utils;
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43
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44
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45 import dwtx.core.runtime.Assert;
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46
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47
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48 /**
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49 * An implementation of <code>IRule</code> capable of detecting whitespace.
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50 * A whitespace rule uses a whitespace detector in order to find out which
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51 * characters are whitespace characters.
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52 *
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53 * @see IWhitespaceDetector
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54 */
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55 public class WhitespaceRule : IRule {
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56
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57 /** The whitespace detector used by this rule */
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58 protected IWhitespaceDetector fDetector;
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59
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60 /**
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61 * Creates a rule which, with the help of an
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62 * whitespace detector, will return a whitespace
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63 * token when a whitespace is detected.
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64 *
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65 * @param detector the rule's whitespace detector, may not be <code>null</code>
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66 */
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67 public WhitespaceRule(IWhitespaceDetector detector) {
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68 Assert.isNotNull(detector);
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69 fDetector= detector;
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70 }
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71
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72 /*
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73 * @see IRule#evaluate(ICharacterScanner)
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74 */
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75 public IToken evaluate(ICharacterScanner scanner) {
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76 int c= scanner.read();
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77 if (fDetector.isWhitespace((char) c)) {
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78 do {
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79 c= scanner.read();
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80 } while (fDetector.isWhitespace((char) c));
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81 scanner.unread();
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82 return Token.WHITESPACE;
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83 }
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84
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85 scanner.unread();
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86 return Token.UNDEFINED;
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87 }
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88 }
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