/*
    * Copyright (c) 2002-2026 Gargoyle Software Inc.
    *
    * Licensed 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
    * https://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.htmlunit.platform.font;
  
  import java.awt.font.FontRenderContext;
  import java.awt.font.LineBreakMeasurer;
  import java.awt.font.TextAttribute;
  import java.text.AttributedString;
  
  import org.apache.commons.lang3.StringUtils;
  import org.htmlunit.css.CssPixelValueConverter;
  
  /**
   * <span style="color:red">INTERNAL API - SUBJECT TO CHANGE AT ANY TIME - USE AT YOUR OWN RISK.</span><br>
   *
   * @author Ronald Brill
   */
  public class AwtFontUtil implements FontUtil {
  
      @Override
      public int countLines(final String content, final int pixelWidth, final String fontSize) {
          int lineCount = 0;
          if (content == null) {
              return lineCount;
          }
  
          final String[] lines = StringUtils.splitByWholeSeparatorPreserveAllTokens(content, "\n");
          final int fontSizeInt = CssPixelValueConverter.pixelValue(fontSize);
          final FontRenderContext fontRenderCtx = new FontRenderContext(null, false, true);
          for (final String line : lines) {
              if (org.htmlunit.util.StringUtils.isBlank(line)) {
                  lineCount++;
              }
              else {
                  // width is specified, we have to do some line breaking
                  final AttributedString attributedString = new AttributedString(line);
                  attributedString.addAttribute(TextAttribute.SIZE, fontSizeInt / 1.1);
                  final LineBreakMeasurer lineBreakMeasurer =
                          new LineBreakMeasurer(attributedString.getIterator(), fontRenderCtx);
                  do {
                      lineBreakMeasurer.nextLayout(pixelWidth);
                      lineCount++;
                  }
                  while (lineBreakMeasurer.getPosition() < line.length() && lineCount < 1000);
              }
          }
          return lineCount;
      }
  }