01: /*BEGIN_COPYRIGHT_BLOCK
02: *
03: * Copyright (c) 2001-2007, JavaPLT group at Rice University (javaplt@rice.edu)
04: * All rights reserved.
05: *
06: * Redistribution and use in source and binary forms, with or without
07: * modification, are permitted provided that the following conditions are met:
08: * * Redistributions of source code must retain the above copyright
09: * notice, this list of conditions and the following disclaimer.
10: * * Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * * Neither the names of DrJava, the JavaPLT group, Rice University, nor the
14: * names of its contributors may be used to endorse or promote products
15: * derived from this software without specific prior written permission.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18: * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
21: * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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36:
37: package edu.rice.cs.drjava.model.definitions.reducedmodel;
38:
39: /**
40: * Shadowing state that corresponds to being inside a block comment.
41: * @version $Id: InsideBlockComment.java 4255 2007-08-28 19:17:37Z mgricken $
42: */
43: public class InsideBlockComment extends ReducedModelState {
44: public static final InsideBlockComment ONLY = new InsideBlockComment();
45:
46: private InsideBlockComment() {
47: }
48:
49: /**
50: * Walk function for inside block comment.
51: * Self-recursive and mutually recursive with other walk functions.
52: * <ol>
53: * <li> If we've reached the end of the list, return.
54: * <li> If we find * /, combine it into a single Brace, and
55: * keep the cursor on that Brace.
56: * <li> If we find // or /*, split that into two Braces and keep the cursor
57: * on the first one.
58: * <li> If current brace = * /, mark the current brace as FREE,
59: * go to the next brace, and call updateFree.<BR>
60: * Else, mark current brace as INSIDE_BLOCK_COMMENT
61: * and go to next brace and recur.
62: * </ol>
63: */
64: ReducedModelState update(TokenList.Iterator copyCursor) {
65: if (copyCursor.atEnd()) {
66: return STUTTER;
67: }
68: _combineCurrentAndNextIfFind("*", "/", copyCursor);
69: _combineCurrentAndNextIfFind("*", "//", copyCursor);
70: _combineCurrentAndNextIfFind("*", "/*", copyCursor);
71: _combineCurrentAndNextIfFind("", "", copyCursor);
72: _combineCurrentAndNextIfEscape(copyCursor);
73:
74: copyCursor._splitCurrentIfCommentBlock(false, false);
75:
76: String type = copyCursor.current().getType();
77: if (type.equals("*/")) {
78: copyCursor.current().setState(FREE);
79: copyCursor.next();
80: return FREE;
81: }
82:
83: else {
84: copyCursor.current().setState(INSIDE_BLOCK_COMMENT);
85: copyCursor.next();
86: return INSIDE_BLOCK_COMMENT;
87: }
88: }
89: }
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