itextpdf.jar is a component in iText 5 Java library to provide core functionalities. iText Java library allows you to generate and manage PDF documents.

The Source Code files are provided at iText GitHub site.

You can compile it to generate your JAR file, using pom.xml as the build configuration file.

The source code of itextpdf-5.5.14.jar is provided below:

⏎ com/itextpdf/text/pdf/PdfRectangle.java

/*
 *
 * This file is part of the iText (R) project.
    Copyright (c) 1998-2020 iText Group NV
 * Authors: Bruno Lowagie, Paulo Soares, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
 * ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
 * OF THIRD PARTY RIGHTS
 *
 * This program 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 Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * a covered work must retain the producer line in every PDF that is created
 * or manipulated using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
 * disclosing the source code of your own applications.
 * These activities include: offering paid services to customers as an ASP,
 * serving PDFs on the fly in a web application, shipping iText with a closed
 * source product.
 *
 * For more information, please contact iText Software Corp. at this
 * address: sales@itextpdf.com
 */
package com.itextpdf.text.pdf;

import com.itextpdf.awt.geom.AffineTransform;
import com.itextpdf.text.Rectangle;

/**
 * <CODE>PdfRectangle</CODE> is the PDF Rectangle object.
 * <P>
 * Rectangles are used to describe locations on the page and bounding boxes for several
 * objects in PDF, such as fonts. A rectangle is represented as an <CODE>array</CODE> of
 * four numbers, specifying the lower left <I>x</I>, lower left <I>y</I>, upper right <I>x</I>,
 * and upper right <I>y</I> coordinates of the rectangle, in that order.<BR>
 * This object is described in the 'Portable Document Format Reference Manual version 1.3'
 * section 7.1 (page 183).
 *
 * @see		com.itextpdf.text.Rectangle
 * @see		PdfArray
 */

public class PdfRectangle extends NumberArray {

    // membervariables

/** lower left x */
    private float llx = 0;

/** lower left y */
    private float lly = 0;

/** upper right x */
    private float urx = 0;

/** upper right y */
    private float ury = 0;

    // constructors

/**
 * Constructs a <CODE>PdfRectangle</CODE>-object.
 *
 * @param		llx			lower left x
 * @param		lly			lower left y
 * @param		urx			upper right x
 * @param		ury			upper right y
 *
 * @since		rugPdf0.10
 */

    public PdfRectangle(float llx, float lly, float urx, float ury, int rotation) {
        super();
        if (rotation == 90 || rotation == 270) {
            this.llx = lly;
            this.lly = llx;
            this.urx = ury;
            this.ury = urx;
        }
        else {
            this.llx = llx;
            this.lly = lly;
            this.urx = urx;
            this.ury = ury;
        }
        super.add(new PdfNumber(this.llx));
        super.add(new PdfNumber(this.lly));
        super.add(new PdfNumber(this.urx));
        super.add(new PdfNumber(this.ury));
    }

    public PdfRectangle(float llx, float lly, float urx, float ury) {
        this(llx, lly, urx, ury, 0);
    }

/**
 * Constructs a <CODE>PdfRectangle</CODE>-object starting from the origin (0, 0).
 *
 * @param		urx			upper right x
 * @param		ury			upper right y
 */

    public PdfRectangle(float urx, float ury, int rotation) {
        this(0, 0, urx, ury, rotation);
    }

    public PdfRectangle(float urx, float ury) {
        this(0, 0, urx, ury, 0);
    }

/**
 * Constructs a <CODE>PdfRectangle</CODE>-object with a <CODE>Rectangle</CODE>-object.
 *
 * @param	rectangle	a <CODE>Rectangle</CODE>
 */

    public PdfRectangle(Rectangle rectangle, int rotation) {
        this(rectangle.getLeft(), rectangle.getBottom(), rectangle.getRight(), rectangle.getTop(), rotation);
    }

    public PdfRectangle(Rectangle rectangle) {
        this(rectangle.getLeft(), rectangle.getBottom(), rectangle.getRight(), rectangle.getTop(), 0);
    }

    // methods
    /**
     * Returns the high level version of this PdfRectangle
     * @return this PdfRectangle translated to class Rectangle
     */
    public Rectangle getRectangle() {
    	return new Rectangle(left(), bottom(), right(), top());
    }

/**
 * Overrides the <CODE>add</CODE>-method in <CODE>PdfArray</CODE> in order to prevent the adding of extra object to the array.
 *
 * @param		object			<CODE>PdfObject</CODE> to add (will not be added here)
 * @return		<CODE>false</CODE>
 */

    public boolean add(PdfObject object) {
        return false;
    }

    /**
     * Block changes to the underlying PdfArray
     * @param values stuff we'll ignore.  Ha!
     * @return false.  You can't add anything to a PdfRectangle
     * @since 2.1.5
     */

    public boolean add( float values[] ) {
        return false;
    }

    /**
     * Block changes to the underlying PdfArray
     * @param values stuff we'll ignore.  Ha!
     * @return false.  You can't add anything to a PdfRectangle
     * @since 2.1.5
     */

    public boolean add( int values[] ) {
        return false;
    }

    /**
     * Block changes to the underlying PdfArray
     * @param object Ignored.
     * @since 2.1.5
     */

    public void addFirst( PdfObject object ) {
    }
/**
 * Returns the lower left x-coordinate.
 *
 * @return		the lower left x-coordinate
 */

    public float left() {
        return llx;
    }

/**
 * Returns the upper right x-coordinate.
 *
 * @return		the upper right x-coordinate
 */

    public float right() {
        return urx;
    }

/**
 * Returns the upper right y-coordinate.
 *
 * @return		the upper right y-coordinate
 */

    public float top() {
        return ury;
    }

/**
 * Returns the lower left y-coordinate.
 *
 * @return		the lower left y-coordinate
 */

    public float bottom() {
        return lly;
    }

/**
 * Returns the lower left x-coordinate, considering a given margin.
 *
 * @param		margin		a margin
 * @return		the lower left x-coordinate
 */

    public float left(int margin) {
        return llx + margin;
    }

/**
 * Returns the upper right x-coordinate, considering a given margin.
 *
 * @param		margin		a margin
 * @return		the upper right x-coordinate
 */

    public float right(int margin) {
        return urx - margin;
    }

/**
 * Returns the upper right y-coordinate, considering a given margin.
 *
 * @param		margin		a margin
 * @return		the upper right y-coordinate
 */

    public float top(int margin) {
        return ury - margin;
    }

/**
 * Returns the lower left y-coordinate, considering a given margin.
 *
 * @param		margin		a margin
 * @return		the lower left y-coordinate
 */

    public float bottom(int margin) {
        return lly + margin;
    }

/**
 * Returns the width of the rectangle.
 *
 * @return		a width
 */

    public float width() {
        return urx - llx;
    }

/**
 * Returns the height of the rectangle.
 *
 * @return		a height
 */

    public float height() {
        return ury - lly;
    }

/**
 * Swaps the values of urx and ury and of lly and llx in order to rotate the rectangle.
 *
 * @return		a <CODE>PdfRectangle</CODE>
 */

    public PdfRectangle rotate() {
        return new PdfRectangle(lly, llx, ury, urx, 0);
    }

    public PdfRectangle transform(AffineTransform transform) {
        float[] pts = {llx, lly, urx, ury};
        transform.transform(pts, 0, pts, 0, 2);
        float[] dstPts = {pts[0], pts[1], pts[2], pts[3]};
        if (pts[0] > pts[2]) {
            dstPts[0] = pts[2];
            dstPts[2] = pts[0];
        }
        if (pts[1] > pts[3]) {
            dstPts[1] = pts[3];
            dstPts[3] = pts[1];
        }
        return new PdfRectangle(dstPts[0], dstPts[1], dstPts[2], dstPts[3]);
    }
}

⏎ com/itextpdf/text/pdf/PdfRectangle.java

Or download all of them as a single archive file:

File name: itextpdf-5.5.14-fyi.zip
File size: 2163839 bytes
Release date: 2009-10-09
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