What Is fop.jar? I got it from the fop-2.7-bin.zip.

fop.jar in fop-2.7-bin.zip is the JAR file for FOP 2.7, which is a print formatter driven by XSL formatting objects (XSL-FO). You can obtain fop.jar from the build folder of the fop-2.7-bin.zip file.

Below is the information about the fop.jar (2.2) file:

JAR File Size and Download Location:

JAR name: fop.jar, fop-2.7.jar
Target JDK version: 1.7
File name: fop.jar
File size: 4442817 bytes
Release date: 20-Jan-2022
Download: Apache FOP Website

Java source code files for fop.jar:

⏎ org/apache/fop/fo/properties/BoxPropShorthandParser.java

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

package org.apache.fop.fo.properties;

import org.apache.fop.fo.FOPropertyMapping;
import org.apache.fop.fo.PropertyList;
import org.apache.fop.fo.expr.PropertyException;

/**
 * Shorthand property parser for Box properties
 */
public class BoxPropShorthandParser extends GenericShorthandParser {

    /**
     * Default constructor.
     */
    public BoxPropShorthandParser() {
    }

    /**
     * Stores 1 to 4 values of same type.
     * Set the given property based on the number of values set.
     * Example: padding, border-width, border-color, border-style, margin
     * {@inheritDoc}
     * int, Property, PropertyMaker, PropertyList)
     */
    protected Property convertValueForProperty(int propId,
                                               Property property,
                                               PropertyMaker maker,
                                               PropertyList propertyList)
                throws PropertyException {
        String name = FOPropertyMapping.getPropertyName(propId);
        Property p = null;
        int count = property.getList().size();
        if (name.indexOf("-top") >= 0) {
            p = getElement(property, 0);
        } else if (name.indexOf("-right") >= 0) {
            p = getElement(property, count > 1 ? 1 : 0);
        } else if (name.indexOf("-bottom") >= 0) {
            p = getElement(property, count > 2 ? 2 : 0);
        } else if (name.indexOf("-left") >= 0) {
            p = getElement(property, count > 3 ? 3 : (count > 1 ? 1 : 0));
        }
        // if p not null, try to convert it to a value of the correct type
        if (p != null) {
            return maker.convertShorthandProperty(propertyList, p, null);
        }
        return p;
    }

}

⏎ org/apache/fop/fo/properties/BoxPropShorthandParser.java

Or download all of them as a single archive file:

File name: fop-2.7-src.zip
File size: 3401312 bytes
Release date: 2022-01-20
Download 

⇒ "fop" Command in fop-2.7-bin.zip

⇐ What Is fop-2.7-bin.zip

⇑ Download and Installing of FOP 2.x

⇑⇑ FAQ for FOP (Formatting Object Processor)