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Java > Open Source Codes > edu > rice > cs > drjava > model > definitions > reducedmodel > InsideSingleQuote


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33
34 package edu.rice.cs.drjava.model.definitions.reducedmodel;
35
36 /**
37  * Shadowing state that corresponds to being between single quotes.
38  * @version $Id: InsideSingleQuote.java 3553 2006-02-20 21:22:09Z rcartwright $
39  */
40 public class InsideSingleQuote extends ReducedModelState {
41   /**
42    * Singleton instance.
43    */
44   public static final InsideSingleQuote ONLY = new InsideSingleQuote();
45
46   /**
47    * Singleton constructor.
48    */
49   private InsideSingleQuote() {
50   }
51
52   /**
53    * Walk function for when inside single quotes.
54    * <ol>
55    * <li> If we've reached the end of the list, return.
56    * <li> If we find //, /* or * /, split them into two separate braces.
57    * The cursor will be on the first of the two new braces.
58    * <li> If current brace = \n or ', mark current brace FREE, next(), and
59    * go to updateFree.
60    * Else, mark current brace as INSIDE_SINGLE_QUOTE, go to next brace, recur.
61    * </ol>
62    */
63   ReducedModelState update(TokenList.Iterator copyCursor) {
64     if (copyCursor.atEnd()) {
65       return STUTTER;
66     }
67     copyCursor._splitCurrentIfCommentBlock(true, false);
68     _combineCurrentAndNextIfFind("", "", copyCursor);
69     _combineCurrentAndNextIfEscape(copyCursor);
70
71     String JavaDoc type = copyCursor.current().getType();
72
73     if (type.equals("\n")) {
74       copyCursor.current().setState(FREE);
75       copyCursor.next();
76       return FREE;
77     }
78     else if (type.equals("\'")) {
79       // make sure this is a CLOSE quote
80 if (copyCursor.current().isOpen()) {
81         copyCursor.current().flip();
82       }
83
84       copyCursor.current().setState(FREE);
85       copyCursor.next();
86       return FREE;
87     }
88     else {
89       copyCursor.current().setState(INSIDE_SINGLE_QUOTE);
90       copyCursor.next();
91       return INSIDE_SINGLE_QUOTE;
92     }
93   }
94 }
95
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