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/layoutmgr/inline/KnuthInlineBox.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: KnuthInlineBox.java 1642793 2014-12-02 00:29:57Z lbernardo $ */

package org.apache.fop.layoutmgr.inline;

import org.apache.fop.layoutmgr.FloatContentLayoutManager;
import org.apache.fop.layoutmgr.FootnoteBodyLayoutManager;
import org.apache.fop.layoutmgr.KnuthBox;
import org.apache.fop.layoutmgr.Position;

/**
 * A knuth inline box.
 */
public class KnuthInlineBox extends KnuthBox {

    private FootnoteBodyLayoutManager footnoteBodyLM;
    private AlignmentContext alignmentContext;
    private FloatContentLayoutManager floatContentLM;


    /**
     * Create a new KnuthBox.
     *
     * @param width            the width of this box
     * @param alignmentContext the alignmentContext for this box
     * @param pos              the Position stored in this box
     * @param auxiliary        is this box auxiliary?
     */
    public KnuthInlineBox(
        int width, AlignmentContext alignmentContext, Position pos, boolean auxiliary) {
        super(width, pos, auxiliary);
        this.alignmentContext = alignmentContext;
    }

    /**
     * @return the alignment context.
     */
    public AlignmentContext getAlignmentContext() {
        return alignmentContext;
    }

    /**
     * @param fblm the FootnoteBodyLM this box must hold a reference to
     */
    public void setFootnoteBodyLM(FootnoteBodyLayoutManager fblm) {
        footnoteBodyLM = fblm;
    }

    /**
     * @return the FootnoteBodyLM this box holds a reference to
     */
    public FootnoteBodyLayoutManager getFootnoteBodyLM() {
        return footnoteBodyLM;
    }

    /**
     * @return true if this box holds a reference to a FootnoteBodyLM
     */
    public boolean isAnchor() {
        return (footnoteBodyLM != null);
    }

    public void setFloatContentLM(FloatContentLayoutManager fclm) {
        floatContentLM = fclm;
    }

    public FloatContentLayoutManager getFloatContentLM() {
        return floatContentLM;
    }

    public boolean isFloatAnchor() {
        return (floatContentLM != null);
    }

}

⏎ org/apache/fop/layoutmgr/inline/KnuthInlineBox.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)