001 /* 002 * Sonar, open source software quality management tool. 003 * Copyright (C) 2009 SonarSource SA 004 * mailto:contact AT sonarsource DOT com 005 * 006 * Sonar is free software; you can redistribute it and/or 007 * modify it under the terms of the GNU Lesser General Public 008 * License as published by the Free Software Foundation; either 009 * version 3 of the License, or (at your option) any later version. 010 * 011 * Sonar is distributed in the hope that it will be useful, 012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014 * Lesser General Public License for more details. 015 * 016 * You should have received a copy of the GNU Lesser General Public 017 * License along with Sonar; if not, write to the Free Software 018 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02 019 */ 020 package org.sonar.colorizer; 021 022 import java.util.Arrays; 023 024 public abstract class MultilinesDocTokenizer extends Tokenizer { 025 026 private static final String COMMENT_STARTED_ON_PREVIOUS_LINE = "COMMENT_STARTED_ON_PREVIOUS_LINE"; 027 private static final String COMMENT_TOKENIZER = "MULTILINE_COMMENT_TOKENIZER"; 028 private final char[] startToken; 029 030 public MultilinesDocTokenizer(String startToken, String tagBefore, String tagAfter) { 031 super(tagBefore, tagAfter); 032 this.startToken = startToken.toCharArray(); 033 } 034 035 public MultilinesDocTokenizer(String startToken) { 036 this("", "", startToken); 037 } 038 039 @Override 040 public boolean hasNextToken(CodeReader code) { 041 return code.peek() != '\n' && code.peek() != '\r' 042 && (isCommentStartedOnPreviousLine(code) || (code.peek() == startToken[0] && Arrays.equals(code.peek(startToken.length), startToken))); 043 } 044 045 @Override 046 public String nextToken(CodeReader code) { 047 return code.popTo(new MultilineEndTokenMatcher(code)); 048 } 049 050 private class MultilineEndTokenMatcher implements EndTokenMatcher { 051 CodeReader code; 052 053 public MultilineEndTokenMatcher(CodeReader code) { 054 this.code = code; 055 } 056 057 public boolean match(int endFlag) { 058 if (code.lastChar() == '/' && code.lastChar(1) == '*') { 059 setCommentStartedOnPreviousLine(code, Boolean.FALSE); 060 return true; 061 } 062 if (endFlag == '\r' || endFlag == '\n') { 063 setCommentStartedOnPreviousLine(code, Boolean.TRUE); 064 return true; 065 } 066 return false; 067 } 068 } 069 070 private boolean isCommentStartedOnPreviousLine(CodeReader reader) { 071 Boolean b = (Boolean)reader.getVariable(COMMENT_STARTED_ON_PREVIOUS_LINE, Boolean.FALSE); 072 return (b == Boolean.TRUE) && (getTokenizerId().equals(reader.getVariable(COMMENT_TOKENIZER))); 073 } 074 075 private void setCommentStartedOnPreviousLine(CodeReader reader, Boolean b) { 076 reader.setVariable(COMMENT_STARTED_ON_PREVIOUS_LINE, b); 077 reader.setVariable(COMMENT_TOKENIZER, b ? getTokenizerId() : null); 078 } 079 080 private String getTokenizerId() { 081 return getClass().getSimpleName(); 082 } 083 }