content: /*
   *  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.causeway.extensions.tabular.pdf.factory.internal;
  
  import java.io.IOException;
  import java.util.Map;
  import java.util.concurrent.ConcurrentHashMap;
  
  import org.apache.pdfbox.pdmodel.font.PDFont;
  
  record Token(
          TokenType type,
          String text,
          Map<PDFont, Float> cache) {
  
      public enum TokenType {
          TEXT, POSSIBLE_WRAP_POINT, WRAP_POINT, OPEN_TAG, CLOSE_TAG, PADDING, BULLET, ORDERING
      }
  
      public static Token text(final String text) {
          return new Token(TokenType.TEXT, text, new ConcurrentHashMap<>());
      }
  
      public Token(final TokenType type, final String text) {
          this(type, text, new ConcurrentHashMap<>());
      }
  
  	public float getWidth(final PDFont font) throws IOException {
  		return cache.computeIfAbsent(font, this::computeWidth);
  	}
  
  	private float computeWidth(final PDFont font) {
  	    try {
              return font.getStringWidth(text);
          } catch (Exception e) {
              // if text contains characters that are unavailable with given font, fallback to an arbitrary placeholder character
              try {
                  return font.getStringWidth("X") * text.length();
              } catch (IOException e1) {
                  return 1.f;
              }
          }
  	}
  
  }
  