iText layout.jar Source Code

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

The Source Code files are provided together with the JAR file in the binary packge like iText7-Core-7.1.4.zip. You can download it at iText 7 Core Download site.

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

The source code of layout-7.1.4.jar is provided below:

✍: FYIcenter.com

com/itextpdf/layout/property/Transform.java

/*
    This file is part of the iText (R) project.
    Copyright (c) 1998-2018 iText Group NV
    Authors: iText Software.

    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.layout.property;

import com.itextpdf.kernel.geom.AffineTransform;

import java.util.ArrayList;
import java.util.List;

/**
 * This class is used to store and process multiple {@code transform} css property before drawing.
 */
public class Transform {
    private List<SingleTransform> multipleTransform;

    /**
     * Creates a new {@link Transform} instance.
     *
     * @param length the amount of {@link SingleTransform} instances that this {@link Transform} instant shall contain and be able to process
     */
    public Transform(int length) {
        multipleTransform = new ArrayList<SingleTransform>(length);
    }

    /**
     * Adds a {@link SingleTransform} in a list of single transforms to process later.
     *
     * @param singleTransform a {@link SingleTransform} instance
     */
    public void addSingleTransform(SingleTransform singleTransform) {
        multipleTransform.add(singleTransform);
    }

    private List<SingleTransform> getMultipleTransform() {
        return multipleTransform;
    }

    /**
     * Converts the {@link Transform} instance, i.e. the list of {@link SingleTransform} instances,
     * to the equivalent {@link AffineTransform} instance relatively to the available area,
     * including resolving of percent values to point values.
     *
     * @param t      a {@link Transform} instance to convert
     * @param width  the width of available area, the point value of which is equivalent to 100% for percentage resolving
     * @param height the height of available area, the point value of which is equivalent to 100% for percentage resolving
     */
    public static AffineTransform getAffineTransform(Transform t, float width, float height) {
        List<SingleTransform> multipleTransform = t.getMultipleTransform();
        AffineTransform affineTransform = new AffineTransform();
        for (int k = multipleTransform.size() - 1; k >= 0; k--) {
            SingleTransform transform = multipleTransform.get(k);
            float[] floats = new float[6];
            for (int i = 0; i < 4; i++)
                floats[i] = transform.getFloats()[i];
            for (int i = 4; i < 6; i++)
                floats[i] = transform.getUnitValues()[i - 4].getUnitType() == UnitValue.POINT ?
                        transform.getUnitValues()[i - 4].getValue() : transform.getUnitValues()[i - 4].getValue() / 100 * (i == 4 ? width : height);
            affineTransform.preConcatenate(new AffineTransform(floats));
        }
        return affineTransform;
    }

    /**
     * This class is used to store one {@code transform} function.
     */
    public static class SingleTransform {
        private float a, b, c, d;
        private UnitValue tx, ty;

        /**
         * Creates a default {@link SingleTransform} instance equivalent to no transform.
         */
        public SingleTransform() {
            this.a = 1;
            this.b = 0;
            this.c = 0;
            this.d = 1;
            this.tx = new UnitValue(UnitValue.POINT, 0);
            this.ty = new UnitValue(UnitValue.POINT, 0);
        }

        /**
         * Creates a {@link SingleTransform} instance.
         *
         * @param a  horizontal scaling
         * @param b  vertical skewing
         * @param c  horizontal skewing
         * @param d  vertical scaling
         * @param tx horizontal translation
         * @param ty vertical translation
         */
        public SingleTransform(float a, float b, float c, float d, UnitValue tx, UnitValue ty) {
            this.a = a;
            this.b = b;
            this.c = c;
            this.d = d;
            this.tx = tx;
            this.ty = ty;
        }

        /**
         * Gets an array of values corresponding to transformation, i.e. scaling and skewing.
         *
         * @return an array of floats
         */
        public float[] getFloats() {
            return new float[]{a, b, c, d};
        }

        /**
         * Gets an array of values corresponding to translation.
         *
         * @return an array of {@link UnitValue}-s
         */
        public UnitValue[] getUnitValues() {
            return new UnitValue[]{tx, ty};
        }
    }
}

com/itextpdf/layout/property/Transform.java

 

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2021-07-03, 9205👍, 0💬