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Open source platform for continuous inspection of code quality

There is a newer version: 25.1.0.102122

/*
 * SonarQube
 * Copyright (C) 2009-2016 SonarSource SA
 * mailto:contact AT sonarsource DOT com
 *
 * 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  02110-1301, USA.
 */
package org.sonar.batch.source;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.sonar.api.batch.sensor.highlighting.NewHighlighting;
import org.sonar.api.batch.sensor.highlighting.TypeOfText;
import org.sonar.colorizer.HtmlCodeBuilder;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class HighlightingCodeBuilder extends HtmlCodeBuilder {

  private static final Logger LOG = LoggerFactory.getLogger(HighlightingCodeBuilder.class);

  private int currentOffset = 0;
  private static final Pattern START_TAG_PATTERN = Pattern.compile("");
  private static final Pattern END_TAG_PATTERN = Pattern.compile("");
  private int startOffset = -1;
  private String cssClass;
  private final NewHighlighting highlighting;

  public HighlightingCodeBuilder(NewHighlighting highlighting) {
    this.highlighting = highlighting;
  }

  @Override
  public Appendable append(CharSequence csq) {
    for (int i = 0; i < csq.length(); i++) {
      append(csq.charAt(i));
    }
    return this;
  }

  @Override
  public Appendable append(char c) {
    currentOffset++;
    return this;
  }

  @Override
  public void appendWithoutTransforming(String htmlTag) {
    if (startOffset == -1) {
      Matcher startMatcher = START_TAG_PATTERN.matcher(htmlTag);
      if (startMatcher.matches()) {
        startOffset = currentOffset;
        cssClass = startMatcher.group(1);
      } else {
        LOG.warn("Expected to match highlighting start html tag but was: " + htmlTag);
      }
    } else {
      Matcher endMatcher = END_TAG_PATTERN.matcher(htmlTag);
      if (endMatcher.matches()) {
        highlighting.highlight(startOffset, currentOffset, TypeOfText.forCssClass(cssClass));
        startOffset = -1;
      } else {
        LOG.warn("Expected to match highlighting end html tag but was: " + htmlTag);
      }
    }
  }

  @Override
  public String toString() {
    throw new UnsupportedOperationException();
  }

  @Override
  public StringBuilder getColorizedCode() {
    throw new UnsupportedOperationException();
  }

}