/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.lucene.search.highlight;
Formats text with different color intensity depending on the score of the term using the span tag. GradientFormatter uses a bgcolor argument to the font tag which doesn't work in Mozilla, thus this class.
See Also:
  • GradientFormatter
/** * Formats text with different color intensity depending on the score of the * term using the span tag. GradientFormatter uses a bgcolor argument to the font tag which * doesn't work in Mozilla, thus this class. * * @see GradientFormatter */
public class SpanGradientFormatter extends GradientFormatter { public SpanGradientFormatter(float maxScore, String minForegroundColor, String maxForegroundColor, String minBackgroundColor, String maxBackgroundColor) { super(maxScore, minForegroundColor, maxForegroundColor, minBackgroundColor, maxBackgroundColor); } @Override public String highlightTerm(String originalText, TokenGroup tokenGroup) { if (tokenGroup.getTotalScore() == 0) return originalText; float score = tokenGroup.getTotalScore(); if (score == 0) { return originalText; } // try to size sb correctly StringBuilder sb = new StringBuilder(originalText.length() + EXTRA); sb.append("<span style=\""); if (highlightForeground) { sb.append("color: "); sb.append(getForegroundColorString(score)); sb.append("; "); } if (highlightBackground) { sb.append("background: "); sb.append(getBackgroundColorString(score)); sb.append("; "); } sb.append("\">"); sb.append(originalText); sb.append("</span>"); return sb.toString(); } // guess how much extra text we'll add to the text we're highlighting to try to avoid a StringBuilder resize private static final String TEMPLATE = "<span style=\"background: #EEEEEE; color: #000000;\">...</span>"; private static final int EXTRA = TEMPLATE.length(); }