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/FloatLayout.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.text.DocumentException;
import com.itextpdf.text.Element;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.WritableDirectElement;
import com.itextpdf.text.api.Spaceable;

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

/**
 * Helper class for PdfDiv to put a collection of Element objects
 * at an absolute position.
 */
public class FloatLayout {
    protected float maxY;

    protected float minY;

    protected float leftX;

    protected float rightX;

    public float getYLine() {
        return yLine;
    }

    public void setYLine(float yLine) {
        this.yLine = yLine;
    }

    protected float yLine;

    protected float floatLeftX;

    protected float floatRightX;

    public float getFilledWidth() {
        return filledWidth;
    }

    public void setFilledWidth(float filledWidth) {
        this.filledWidth = filledWidth;
    }

    protected float filledWidth;

    protected final ColumnText compositeColumn;

    protected final List<Element> content;

    protected final boolean useAscender;

    public int getRunDirection() {
        return compositeColumn.getRunDirection();
    }

    public void setRunDirection(int runDirection) {
        compositeColumn.setRunDirection(runDirection);
    }

    public FloatLayout(List<Element> elements, boolean useAscender) {
        compositeColumn = new ColumnText(null);
        compositeColumn.setUseAscender(useAscender);
        this.useAscender = useAscender;
        content = elements;
    }

    public void setSimpleColumn(final float llx, final float lly, final float urx, final float ury) {
        leftX = Math.min(llx, urx);
        maxY = Math.max(lly, ury);
        minY = Math.min(lly, ury);
        rightX = Math.max(llx, urx);
        floatLeftX = leftX;
        floatRightX = rightX;
        yLine = maxY;
        filledWidth = 0;
    }

    public int layout(PdfContentByte canvas, boolean simulate)  throws DocumentException  {
        compositeColumn.setCanvas(canvas);
        int status = ColumnText.NO_MORE_TEXT;

        ArrayList<Element> floatingElements = new ArrayList<Element>();
        List<Element> content = simulate ? new ArrayList<Element>(this.content) : this.content;

        while (!content.isEmpty()) {
            if (content.get(0) instanceof PdfDiv) {
                PdfDiv floatingElement = (PdfDiv)content.get(0);
                if (floatingElement.getFloatType() == PdfDiv.FloatType.LEFT || floatingElement.getFloatType() == PdfDiv.FloatType.RIGHT) {
                    floatingElements.add(floatingElement);
                    content.remove(0);
                } else {
                    if (!floatingElements.isEmpty()) {
                        status = floatingLayout(floatingElements, simulate);
                        if ((status & ColumnText.NO_MORE_TEXT) == 0) {
                            break;
                        }
                    }

                    content.remove(0);

                    status = floatingElement.layout(canvas, useAscender, true, floatLeftX, minY, floatRightX, yLine);

                    if (floatingElement.getKeepTogether() && (status & ColumnText.NO_MORE_TEXT) == 0) {
                        //check for empty page
                        if (compositeColumn.getCanvas().getPdfDocument().currentHeight > 0 || yLine != maxY) {
                            content.add(0, floatingElement);
                            break;
                        }
                    }

                    if (!simulate) {
                        canvas.openMCBlock(floatingElement);
                        status = floatingElement.layout(canvas, useAscender, simulate, floatLeftX, minY, floatRightX, yLine);
                        canvas.closeMCBlock(floatingElement);
                    }

                    if (floatingElement.getActualWidth() > filledWidth) {
                        filledWidth = floatingElement.getActualWidth();
                    }
                    if ((status & ColumnText.NO_MORE_TEXT) == 0) {
                        content.add(0, floatingElement);
                        yLine = floatingElement.getYLine();
                        break;
                    } else {
                        yLine -= floatingElement.getActualHeight();
                    }
                }
            } else {
                floatingElements.add(content.get(0));
                content.remove(0);
            }
        }

        if ((status & ColumnText.NO_MORE_TEXT) != 0 && !floatingElements.isEmpty()) {
            status = floatingLayout(floatingElements, simulate);
        }

        content.addAll(0, floatingElements);

        return status;
    }

    private int floatingLayout(List<Element> floatingElements, boolean simulate) throws DocumentException {
        int status = ColumnText.NO_MORE_TEXT;
        float minYLine = yLine;
        float leftWidth = 0;
        float rightWidth = 0;

        ColumnText currentCompositeColumn = compositeColumn;
        if (simulate) {
            currentCompositeColumn = ColumnText.duplicate(compositeColumn);
        }

        boolean ignoreSpacingBefore = maxY == yLine;

        while (!floatingElements.isEmpty()) {
            Element nextElement = floatingElements.get(0);
            floatingElements.remove(0);
            if (nextElement instanceof PdfDiv) {
                PdfDiv floatingElement = (PdfDiv) nextElement;
                status = floatingElement.layout(compositeColumn.getCanvas(), useAscender, true, floatLeftX, minY, floatRightX, yLine);
                if ((status & ColumnText.NO_MORE_TEXT) == 0) {
                    yLine = minYLine;
                    floatLeftX = leftX;
                    floatRightX = rightX;
                    status = floatingElement.layout(compositeColumn.getCanvas(), useAscender, true, floatLeftX, minY, floatRightX, yLine);
                    if ((status & ColumnText.NO_MORE_TEXT) == 0) {
                        floatingElements.add(0, floatingElement);
                        break;
                    }
                }
                if (floatingElement.getFloatType() == PdfDiv.FloatType.LEFT) {
                    status = floatingElement.layout(compositeColumn.getCanvas(), useAscender, simulate, floatLeftX, minY, floatRightX, yLine);
                    floatLeftX += floatingElement.getActualWidth();
                    leftWidth += floatingElement.getActualWidth();
                } else if (floatingElement.getFloatType() == PdfDiv.FloatType.RIGHT) {
                    status = floatingElement.layout(compositeColumn.getCanvas(), useAscender, simulate, floatRightX - floatingElement.getActualWidth() - 0.01f, minY, floatRightX, yLine);
                    floatRightX -= floatingElement.getActualWidth();
                    rightWidth += floatingElement.getActualWidth();
                }
                minYLine = Math.min(minYLine, yLine - floatingElement.getActualHeight());
            } else {
                if (minY > minYLine) {
                    status = ColumnText.NO_MORE_COLUMN;
                    floatingElements.add(0, nextElement);
                    if (currentCompositeColumn != null)
                        currentCompositeColumn.setText(null);
                    break;
                } else {
                    if (nextElement instanceof Spaceable && (!ignoreSpacingBefore || !currentCompositeColumn.isIgnoreSpacingBefore() || ((Spaceable) nextElement).getPaddingTop() != 0)) {
                        yLine -= ((Spaceable) nextElement).getSpacingBefore();
                    }
                    if (simulate) {
                        if (nextElement instanceof PdfPTable)
                            currentCompositeColumn.addElement(new PdfPTable((PdfPTable)nextElement));
                        else
                            currentCompositeColumn.addElement(nextElement);
                    } else {
                        currentCompositeColumn.addElement(nextElement);
                    }

                    if (yLine > minYLine)
                        currentCompositeColumn.setSimpleColumn(floatLeftX, yLine, floatRightX, minYLine);
                    else
                        currentCompositeColumn.setSimpleColumn(floatLeftX, yLine, floatRightX, minY);

                    currentCompositeColumn.setFilledWidth(0);

                    status = currentCompositeColumn.go(simulate);
                    if (yLine > minYLine && (floatLeftX > leftX || floatRightX < rightX) && (status & ColumnText.NO_MORE_TEXT) == 0) {
                        yLine = minYLine;
                        floatLeftX = leftX;
                        floatRightX = rightX;
                        if (leftWidth != 0 && rightWidth != 0) {
                            filledWidth = rightX - leftX;
                        } else {
                            if (leftWidth > filledWidth) {
                                filledWidth = leftWidth;
                            }
                            if (rightWidth > filledWidth) {
                                filledWidth = rightWidth;
                            }
                        }

                        leftWidth = 0;
                        rightWidth = 0;
                        if (simulate && nextElement instanceof PdfPTable) {
                            currentCompositeColumn.addElement(new PdfPTable((PdfPTable)nextElement));
                        }

                        currentCompositeColumn.setSimpleColumn(floatLeftX, yLine, floatRightX, minY);
                        status = currentCompositeColumn.go(simulate);
                        minYLine = currentCompositeColumn.getYLine() + currentCompositeColumn.getDescender();
                        yLine = minYLine;
                        if (currentCompositeColumn.getFilledWidth() > filledWidth) {
                            filledWidth = currentCompositeColumn.getFilledWidth();
                        }
                    } else {
                        if (rightWidth > 0) {
                            rightWidth += currentCompositeColumn.getFilledWidth();
                        } else if (leftWidth > 0) {
                            leftWidth += currentCompositeColumn.getFilledWidth();
                        } else if (currentCompositeColumn.getFilledWidth() > filledWidth) {
                            filledWidth = currentCompositeColumn.getFilledWidth();
                        }
                        minYLine = Math.min(currentCompositeColumn.getYLine() + currentCompositeColumn.getDescender(), minYLine);
                        yLine = currentCompositeColumn.getYLine() + currentCompositeColumn.getDescender();
                    }

                    if ((status & ColumnText.NO_MORE_TEXT) == 0) {
                        if (!simulate) {
                            floatingElements.addAll(0, currentCompositeColumn.getCompositeElements());
                            currentCompositeColumn.getCompositeElements().clear();
                        } else {
                            floatingElements.add(0, nextElement);
                            currentCompositeColumn.setText(null);
                        }
                        break;
                    } else {
                        currentCompositeColumn.setText(null);
                    }
                }
            }

            if (nextElement instanceof Paragraph) {
                Paragraph p = (Paragraph) nextElement;
                for (Element e : p) {
                    if (e instanceof WritableDirectElement) {
                        WritableDirectElement writableElement = (WritableDirectElement) e;
                        if (writableElement.getDirectElementType() == WritableDirectElement.DIRECT_ELEMENT_TYPE_HEADER && !simulate) {
                            PdfWriter writer = compositeColumn.getCanvas().getPdfWriter();
                            PdfDocument doc = compositeColumn.getCanvas().getPdfDocument();

                            // here is used a little hack:
                            // writableElement.write() method implementation uses PdfWriter.getVerticalPosition() to create PdfDestination (see com.itextpdf.tool.xml.html.Header),
                            // so here we are adjusting document's currentHeight in order to make getVerticalPosition() return value corresponding to real current position
                            float savedHeight = doc.currentHeight;
                            doc.currentHeight = doc.top() - yLine - doc.indentation.indentTop;
                            writableElement.write(writer, doc);
                            doc.currentHeight = savedHeight;
                        }
                    }
                }
            }

            if (ignoreSpacingBefore && nextElement.getChunks().size() == 0) {
                if (nextElement instanceof Paragraph){
                    Paragraph p = (Paragraph) nextElement;
                    Element e = p.get(0);
                    if (e instanceof WritableDirectElement){
                        WritableDirectElement writableElement  = (WritableDirectElement) e;
                        if (writableElement.getDirectElementType() != WritableDirectElement.DIRECT_ELEMENT_TYPE_HEADER) {
                            ignoreSpacingBefore = false;
                        }
                    }
                } else if (nextElement instanceof Spaceable) {
                    ignoreSpacingBefore = false;
                }

            } else {
                ignoreSpacingBefore = false;
            }
        }

        if (leftWidth != 0 && rightWidth != 0) {
            filledWidth = rightX - leftX;
        } else {
            if (leftWidth > filledWidth) {
                filledWidth = leftWidth;
            }
            if (rightWidth > filledWidth) {
                filledWidth = rightWidth;
            }
        }

        yLine = minYLine;
        floatLeftX = leftX;
        floatRightX = rightX;

        return status;
    }
}

com/itextpdf/text/pdf/FloatLayout.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, 47711👍, 0💬