code: /* LanguageTool, a natural language style checker 
   * Copyright (C) 2005 Daniel Naber (http://www.danielnaber.de)
   * 
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
   * USA
   */
  package org.languagetool.rules;
  
  import java.net.URL;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.ResourceBundle;
  
  import org.languagetool.AnalyzedSentence;
  import org.languagetool.AnalyzedTokenReadings;
  import org.languagetool.tools.Tools;
  
  /**
   * A rule that matches ".." (but not "..." etc) and ",,".
   * 
   * @author Daniel Naber
   */
  public class DoublePunctuationRule extends Rule {
  
    public DoublePunctuationRule(ResourceBundle messages) {
      this(messages, null);
    }
  
    /** @since 5.9 */
    public DoublePunctuationRule(ResourceBundle messages, URL url) {
      super(messages);
      super.setCategory(Categories.PUNCTUATION.getCategory(messages));
      setLocQualityIssueType(ITSIssueType.Typographical);
      if (url != null) {
        setUrl(url);
      }
    }
  
    @Override
    public String getId() {
      return "DOUBLE_PUNCTUATION";
    }
  
    @Override
    public final String getDescription() {
      return messages.getString("desc_double_punct");
    }
    
    public String getCommaCharacter() {
      return ",";
    }
  
    @Override
    public final RuleMatch[] match(AnalyzedSentence sentence) {
      List<RuleMatch> ruleMatches = new ArrayList<>();
      AnalyzedTokenReadings[] tokens = sentence.getTokensWithoutWhitespace();
      int startPos = 0;
      int dotCount = 0;
      int commaCount = 0;
      for (int i = 1; i < tokens.length; i++) {
        String token = tokens[i].getToken();
        String nextToken = null;
        String prevPrevToken = null;
        if (i < tokens.length - 1) {
          nextToken = tokens[i + 1].getToken();
        }
        if (i > 1) {
          prevPrevToken = tokens[i - 2].getToken();
        }
        if (".".equals(token)) {
          dotCount++;
          commaCount = 0;
          startPos = tokens[i].getStartPos();
        } else if (getCommaCharacter().equals(token)) {
          commaCount++;
          dotCount = 0;
          startPos = tokens[i].getStartPos();
        }
  
  
        if (dotCount == 2 && !".".equals(nextToken) && !"…".equals(nextToken) &&
            !"/".equals(token) && !"/".equals(nextToken) &&  /* Unix path */
            !"\\".equals(token) && !"\\".equals(nextToken) &&  /* Windows path */
            !"?".equals(prevPrevToken) && !"!".equals(prevPrevToken) &&
            !"…".equals(prevPrevToken) && !".".equals(prevPrevToken)) {
          int fromPos = Math.max(0, startPos - 1);
          RuleMatch ruleMatch = new RuleMatch(this, sentence, fromPos, startPos + 1,
              getDotMessage(), messages.getString("double_dots_short"));
          ruleMatch.addSuggestedReplacement(".");
          ruleMatch.addSuggestedReplacement("…");
          ruleMatches.add(ruleMatch);
          dotCount = 0;
        } else if (commaCount == 2 && !getCommaCharacter().equals(nextToken)) {
          int fromPos = Math.max(0, startPos - 1);
          RuleMatch ruleMatch = new RuleMatch(this, sentence, fromPos, startPos + 1,
              getCommaMessage(), messages.getString("double_commas_short"));
          ruleMatch.setSuggestedReplacement(getCommaCharacter());
          ruleMatches.add(ruleMatch);
          commaCount = 0;
        }
        if (!".".equals(token) && !getCommaCharacter().equals(token)) {
          dotCount = 0;
          commaCount = 0;
        }
      }
  
      return toRuleMatchArray(ruleMatches);
    }
  
    protected String getDotMessage() {
      return messages.getString("two_dots");
    }
  
    protected String getCommaMessage() {
      return messages.getString("two_commas");
    }
    
  }
  