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: SimplePercentBaseContext.java 679326 2008-07-24 09:35:34Z vhennebert $ */

package org.apache.fop.datatypes;

import org.apache.fop.fo.FObj;


Class to implement a simple lookup context for a single percent base value.

/**
 * Class to implement a simple lookup context for a single percent base value.
 */
public class SimplePercentBaseContext implements PercentBaseContext {

    private PercentBaseContext parentContext;
    private int lengthBase;
    private int lengthBaseValue;

    
Params:
  • parentContext – the context to be used for all percentages other than lengthBase
  • lengthBase – the particular percentage length base for which this context provides
                  a value
  • lengthBaseValue – the value to be returned for requests to the given lengthBase
/**
     * @param parentContext the context to be used for all percentages other than lengthBase
     * @param lengthBase the particular percentage length base for which this context provides
     *                   a value
     * @param lengthBaseValue the value to be returned for requests to the given lengthBase
     */
    public SimplePercentBaseContext(PercentBaseContext parentContext,
                             int lengthBase,
                             int lengthBaseValue) {
        this.parentContext = parentContext;
        this.lengthBase = lengthBase;
        this.lengthBaseValue = lengthBaseValue;
    }

    
Returns the value for the given lengthBase.
{@inheritDoc}

/**
     * Returns the value for the given lengthBase.
     * {@inheritDoc}
     */
    public int getBaseLength(int lengthBase, FObj fobj) {
        // if its for us return our value otherwise delegate to parent context
        if (lengthBase == this.lengthBase) {
            return lengthBaseValue;
        } else if (parentContext != null) {
            return parentContext.getBaseLength(lengthBase, fobj);
        }
        return -1;
    }

}