iText 5 itextpdf.jar Source Code

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:

✍: FYIcenter.com

com/itextpdf/text/pdf/parser/clipper/Edge.java

/*
 *
 * This file is part of the iText (R) project.
 * Copyright (c) 2014-2015 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
 *
 *
 * This class is based on the C# open source freeware library Clipper:
 * http://www.angusj.com/delphi/clipper.php
 * The original classes were distributed under the Boost Software License:
 *
 * Freeware for both open source and commercial applications
 * Copyright 2010-2014 Angus Johnson
 * Boost Software License - Version 1.0 - August 17th, 2003
 *
 * Permission is hereby granted, free of charge, to any person or organization
 * obtaining a copy of the software and accompanying documentation covered by
 * this license (the "Software") to use, reproduce, display, distribute,
 * execute, and transmit the Software, and to prepare derivative works of the
 * Software, and to permit third-parties to whom the Software is furnished to
 * do so, all subject to the following:
 *
 * The copyright notices in the Software and this entire statement, including
 * the above license grant, this restriction and the following disclaimer,
 * must be included in all copies of the Software, in whole or in part, and
 * all derivative works of the Software, unless such copies or derivative
 * works are solely in the form of machine-executable object code generated by
 * a source language processor.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
 * SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
 * FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */
package com.itextpdf.text.pdf.parser.clipper;

import java.math.BigInteger;
import java.util.logging.Logger;

import com.itextpdf.text.pdf.parser.clipper.Clipper.ClipType;
import com.itextpdf.text.pdf.parser.clipper.Clipper.Direction;
import com.itextpdf.text.pdf.parser.clipper.Clipper.PolyFillType;
import com.itextpdf.text.pdf.parser.clipper.Clipper.PolyType;
import com.itextpdf.text.pdf.parser.clipper.Point.LongPoint;

class Edge {
    static enum Side {
        LEFT, RIGHT
    }

    static boolean doesE2InsertBeforeE1( Edge e1, Edge e2 ) {
        if (e2.current.getX() == e1.current.getX()) {
            if (e2.top.getY() > e1.top.getY()) {
                return e2.top.getX() < topX( e1, e2.top.getY() );
            }
            else {
                return e1.top.getX() > topX( e2, e1.top.getY() );
            }
        }
        else {
            return e2.current.getX() < e1.current.getX();
        }
    }

    static boolean slopesEqual( Edge e1, Edge e2, boolean useFullRange ) {
        if (useFullRange) {
            return BigInteger.valueOf(e1.getDelta().getY()).multiply(BigInteger.valueOf(e2.getDelta().getX())).equals(
                   BigInteger.valueOf(e1.getDelta().getX()).multiply(BigInteger.valueOf(e2.getDelta().getY())));
        } else {
            return (e1.getDelta().getY()) * (e2.getDelta().getX()) == (e1.getDelta().getX()) * (e2.getDelta().getY());
        }
    }

    static void swapPolyIndexes( Edge edge1, Edge edge2 ) {
        final int outIdx = edge1.outIdx;
        edge1.outIdx = edge2.outIdx;
        edge2.outIdx = outIdx;
    }

    static void swapSides( Edge edge1, Edge edge2 ) {
        final Edge.Side side = edge1.side;
        edge1.side = edge2.side;
        edge2.side = side;
    }

    static long topX( Edge edge, long currentY ) {
        if (currentY == edge.getTop().getY()) {
            return edge.getTop().getX();
        }
        return (edge.getBot().getX() + Math.round( edge.deltaX * (currentY - edge.getBot().getY()) ));
    }

    private final LongPoint bot;

    private final LongPoint current;

    private final LongPoint top;

    private final LongPoint delta;
    double deltaX;

    PolyType polyTyp;

    Edge.Side side;

    int windDelta; //1 or -1 depending on winding direction

    int windCnt;
    int windCnt2; //winding count of the opposite polytype
    int outIdx;
    Edge next;
    Edge prev;
    Edge nextInLML;
    Edge nextInAEL;
    Edge prevInAEL;
    Edge nextInSEL;
    Edge prevInSEL;

    protected final static int SKIP = -2;

    protected final static int UNASSIGNED = -1;

    protected final static double HORIZONTAL = -3.4E+38;

    private final static Logger LOGGER = Logger.getLogger( Edge.class.getName() );

    public Edge() {
        delta = new LongPoint();
        top = new LongPoint();
        bot = new LongPoint();
        current = new LongPoint();
    }

    public Edge findNextLocMin() {
        Edge e = this;
        Edge e2;
        for (;;) {
            while (!e.bot.equals( e.prev.bot ) || e.current.equals( e.top )) {
                e = e.next;
            }
            if (e.deltaX != Edge.HORIZONTAL && e.prev.deltaX != Edge.HORIZONTAL) {
                break;
            }
            while (e.prev.deltaX == Edge.HORIZONTAL) {
                e = e.prev;
            }
            e2 = e;
            while (e.deltaX == Edge.HORIZONTAL) {
                e = e.next;
            }
            if (e.top.getY() == e.prev.bot.getY()) {
                continue; //ie just an intermediate horz.
            }
            if (e2.prev.bot.getX() < e.bot.getX()) {
                e = e2;
            }
            break;
        }
        return e;
    }

    public LongPoint getBot() {
        return bot;
    }

    public LongPoint getCurrent() {
        return current;
    }

    public LongPoint getDelta() {
        return delta;
    }

    public Edge getMaximaPair() {
        Edge result = null;
        if (next.top.equals( top ) && next.nextInLML == null) {
            result = next;
        }
        else if (prev.top.equals( top ) && prev.nextInLML == null) {
            result = prev;
        }
        if (result != null && (result.outIdx == Edge.SKIP || result.nextInAEL == result.prevInAEL && !result.isHorizontal())) {
            return null;
        }
        return result;
    }

    public Edge getNextInAEL( Direction direction ) {
        return direction == Direction.LEFT_TO_RIGHT ? nextInAEL : prevInAEL;
    }

    public LongPoint getTop() {
        return top;
    }

    public boolean isContributing( PolyFillType clipFillType, PolyFillType subjFillType, ClipType clipType ) {
        LOGGER.entering( Edge.class.getName(), "isContributing" );

        PolyFillType pft, pft2;
        if (polyTyp == PolyType.SUBJECT) {
            pft = subjFillType;
            pft2 = clipFillType;
        }
        else {
            pft = clipFillType;
            pft2 = subjFillType;
        }

        switch (pft) {
            case EVEN_ODD:
                //return false if a subj line has been flagged as inside a subj polygon
                if (windDelta == 0 && windCnt != 1) {
                    return false;
                }
                break;
            case NON_ZERO:
                if (Math.abs( windCnt ) != 1) {
                    return false;
                }
                break;
            case POSITIVE:
                if (windCnt != 1) {
                    return false;
                }
                break;
            default: //PolyFillType.pftNegative
                if (windCnt != -1) {
                    return false;
                }
                break;
        }

        switch (clipType) {
            case INTERSECTION:
                switch (pft2) {
                    case EVEN_ODD:
                    case NON_ZERO:
                        return windCnt2 != 0;
                    case POSITIVE:
                        return windCnt2 > 0;
                    default:
                        return windCnt2 < 0;
                }
            case UNION:
                switch (pft2) {
                    case EVEN_ODD:
                    case NON_ZERO:
                        return windCnt2 == 0;
                    case POSITIVE:
                        return windCnt2 <= 0;
                    default:
                        return windCnt2 >= 0;
                }
            case DIFFERENCE:
                if (polyTyp == PolyType.SUBJECT) {
                    switch (pft2) {
                        case EVEN_ODD:
                        case NON_ZERO:
                            return windCnt2 == 0;
                        case POSITIVE:
                            return windCnt2 <= 0;
                        default:
                            return windCnt2 >= 0;
                    }
                }
                else {
                    switch (pft2) {
                        case EVEN_ODD:
                        case NON_ZERO:
                            return windCnt2 != 0;
                        case POSITIVE:
                            return windCnt2 > 0;
                        default:
                            return windCnt2 < 0;
                    }
                }
            case XOR:
                if (windDelta == 0) {
                    switch (pft2) {
                        case EVEN_ODD:
                        case NON_ZERO:
                            return windCnt2 == 0;
                        case POSITIVE:
                            return windCnt2 <= 0;
                        default:
                            return windCnt2 >= 0;
                    }
                }
                else {
                    return true;
                }
        }
        return true;
    }

    public boolean isEvenOddAltFillType( PolyFillType clipFillType, PolyFillType subjFillType ) {
        if (polyTyp == PolyType.SUBJECT) {
            return clipFillType == PolyFillType.EVEN_ODD;
        }
        else {
            return subjFillType == PolyFillType.EVEN_ODD;
        }
    }

    public boolean isEvenOddFillType( PolyFillType clipFillType, PolyFillType subjFillType ) {
        if (polyTyp == PolyType.SUBJECT) {
            return subjFillType == PolyFillType.EVEN_ODD;
        }
        else {
            return clipFillType == PolyFillType.EVEN_ODD;
        }
    }

    public boolean isHorizontal() {
        return delta.getY() == 0;
    }

    public boolean isIntermediate( double y ) {
        return top.getY() == y && nextInLML != null;
    }

    public boolean isMaxima( double Y ) {
        return top.getY() == Y && nextInLML == null;
    }

    public void reverseHorizontal() {
        //swap horizontal edges' top and bottom x's so they follow the natural
        //progression of the bounds - ie so their xbots will align with the
        //adjoining lower edge. [Helpful in the ProcessHorizontal() method.]
        long temp = top.getX();
        top.setX( bot.getX() );
        bot.setX( temp );

        temp = top.getZ();
        top.setZ( bot.getZ() );
        bot.setZ( temp );

    }

    public void setBot( LongPoint bot ) {
        this.bot.set( bot );
    }

    public void setCurrent( LongPoint current ) {
        this.current.set( current );
    }

    public void setTop( LongPoint top ) {
        this.top.set( top );
    }

    @Override
    public String toString() {
        return "TEdge [Bot=" + bot + ", Curr=" + current + ", Top=" + top + ", Delta=" + delta + ", Dx=" + deltaX + ", PolyTyp=" + polyTyp + ", Side=" + side
                        + ", WindDelta=" + windDelta + ", WindCnt=" + windCnt + ", WindCnt2=" + windCnt2 + ", OutIdx=" + outIdx + ", Next=" + next + ", Prev="
                        + prev + ", NextInLML=" + nextInLML + ", NextInAEL=" + nextInAEL + ", PrevInAEL=" + prevInAEL + ", NextInSEL=" + nextInSEL
                        + ", PrevInSEL=" + prevInSEL + "]";
    }

    public void updateDeltaX() {

        delta.setX( top.getX() - bot.getX() );
        delta.setY( top.getY() - bot.getY() );
        if (delta.getY() == 0) {
            deltaX = Edge.HORIZONTAL;
        }
        else {
            deltaX = (double) delta.getX() / delta.getY();
        }
    }

};

com/itextpdf/text/pdf/parser/clipper/Edge.java

 

⇒ iText-2.1.6.jar - iText, a JAVA-PDF library

⇐ iText layout.jar Source Code

⇑ Download and Install iText Java Library

⇑⇑ iText for PDF Generation

2021-07-03, 48155👍, 0💬