http://xmlgraphics.apache.org/fop/: Apache FOP (Formatting Objects Processor) is the world's first print formatter driven by XSL formatting objects (XSL-FO) and the world's first output independent formatter. It is a Java application that reads a formatting object (FO) tree and renders the resulting pages to a specified output. Output formats currently supported include PDF, PCL, PS, AFP, TIFF, PNG, SVG, XML (area tree representation), Print, AWT and TXT. The primary output target is PDF. (Apache Software Foundation) 
/*
 * 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.
 */

/* $Id $ */

package org.apache.fop.datatypes;

import org.apache.fop.fo.FObj;


This interface is used by the layout managers to provide relevant information
back to the property percentage resolution logic, that is
the percentages based property getValue() functions expect an object implementing
this interface as an argument.

/**
 * This interface is used by the layout managers to provide relevant information
 * back to the property percentage resolution logic, that is
 * the percentages based property getValue() functions expect an object implementing
 * this interface as an argument.
 */
public interface PercentBaseContext {

    
Returns the base length for the given length base. Length base should be one of the constants defined in LengthBase. 
Params:
  • lengthBase – Indicates which type of the base length value is to be returned
  • fobj – The FO object against which the percentage should be evaluated
Returns:The base length value of the given kind
/**
     * Returns the base length for the given length base.
     * Length base should be one of the constants defined in {@link LengthBase}.
     * @param lengthBase Indicates which type of the base length value is to be returned
     * @param fobj The FO object against which the percentage should be evaluated
     * @return The base length value of the given kind
     */
    int getBaseLength(int lengthBase, FObj fobj);

}