FlameReader.java

/*
  JWildfire - an image and animation processor written in Java 
  Copyright (C) 1995-2017 Andreas Maschke

  This 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 2.1 of the 
  License, or (at your option) any later version.
 
  This software 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 software; 
  if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jwildfire.create.tina.io;

import java.util.ArrayList;
import java.util.List;

import org.jwildfire.base.Prefs;
import org.jwildfire.base.Tools;
import org.jwildfire.create.tina.base.Flame;

public class FlameReader {
  public static final String ATTR_FLAMES = "flames";

  private final Prefs prefs;

  public FlameReader(Prefs pPrefs) {
    prefs = pPrefs;
  }

  public List<Flame> readFlames(String pFilename) {
    try {
      String flamesXML = Tools.readUTF8Textfile(pFilename);
      return readFlamesfromXML(flamesXML);
    }
    catch (Exception ex) {
      throw new RuntimeException(ex);
    }
  }

  public List<Flame> readFlamesfromXML(String pXML) {
    int p = Math.max(pXML.indexOf("<Flames>"), pXML.indexOf("<" + ATTR_FLAMES + ">"));
    if (p >= 0) {
      List<Flame> flames = new ArrayList<>();
      while (true) {
        int nextFlameStart = pXML.indexOf("<" + JWFFlameReader.ATTR_FLAME, p + 1);
        int nextJWFFlameStart = pXML.indexOf("<" + JWFFlameReader.ATTR_JWF_FLAME, p + 1);
        if (nextFlameStart < 0 && nextJWFFlameStart < 0) {
          break;
        }
        else if (nextFlameStart >= 0 && !(nextJWFFlameStart > 0 && nextJWFFlameStart < nextFlameStart)) {
          int nextFlameEnd = pXML.indexOf("</" + JWFFlameReader.ATTR_FLAME + ">", nextFlameStart + 1) + JWFFlameReader.ATTR_FLAME.length() + "</".length() + ">".length();
          String xml = pXML.substring(nextFlameStart, nextFlameEnd);
          flames.addAll(new Flam3Reader(prefs).readFlamesfromXML(xml));
          p = nextFlameEnd;
        }
        else {
          int nextJWFFlameEnd = pXML.indexOf("</" + JWFFlameReader.ATTR_JWF_FLAME + ">", nextJWFFlameStart + 1) + JWFFlameReader.ATTR_JWF_FLAME.length() + "</".length() + ">".length();
          String xml = pXML.substring(nextJWFFlameStart, nextJWFFlameEnd);
          flames.addAll(new JWFFlameReader(prefs).readFlamesfromXML(xml));
          p = nextJWFFlameEnd;
        }

      }
      return flames;
    }
    else {

      if (pXML.indexOf("<" + JWFFlameReader.ATTR_JWF_FLAME) >= 0) {
        return new JWFFlameReader(prefs).readFlamesfromXML(pXML);
      }
      else {
        return new Flam3Reader(prefs).readFlamesfromXML(pXML);
      }
    }
  }
}