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/*
 * Sonar C++ Plugin (Community)
 * Copyright (C) 2011 Waleri Enns and CONTACT Software GmbH
 * [email protected]
 *
 * This program 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 3 of the License, or (at your option) any later version.
 *
 * This program 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 program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
 */
package org.sonar.cxx;

import com.sonar.sslr.api.AstAndTokenVisitor;
import com.sonar.sslr.api.AstNode;
import com.sonar.sslr.api.Grammar;
import com.sonar.sslr.api.Token;
import com.sonar.sslr.squid.SquidAstVisitor;
import org.sonar.squid.measures.MetricDef;

import static com.sonar.sslr.api.GenericTokenType.EOF;

/**
 * Visitor that computes the number of lines of code of a file.
 */
public class CxxLinesOfCodeVisitor extends SquidAstVisitor implements AstAndTokenVisitor {

  private final MetricDef metric;
  private int lastTokenLine;

  public CxxLinesOfCodeVisitor(MetricDef metric) {
    this.metric = metric;
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void visitFile(AstNode node) {
    lastTokenLine = -1;
  }

  /**
   * {@inheritDoc}
   */
  public void visitToken(Token token) {
    if (token.getType() != EOF) {
      /* Handle all the lines of the token */
      String[] tokenLines = token.getValue().split("\n", -1);

      int firstLineAlreadyCounted = lastTokenLine == token.getLine() ? 1 : 0;
      getContext().peekSourceCode().add(metric, tokenLines.length - firstLineAlreadyCounted);

      lastTokenLine = token.getLine() + tokenLines.length - 1;
    }
  }

}