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/FontSelector.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.Chunk;
import com.itextpdf.text.Font;
import com.itextpdf.text.Phrase;
import com.itextpdf.text.Utilities;
import com.itextpdf.text.error_messages.MessageLocalization;
import com.itextpdf.text.log.Logger;
import com.itextpdf.text.log.LoggerFactory;

import java.text.MessageFormat;
import java.util.ArrayList;

/** Selects the appropriate fonts that contain the glyphs needed to
 * render text correctly. The fonts are checked in order until the
 * character is found.
 * <p>
 * The built in fonts "Symbol" and "ZapfDingbats", if used, have a special encoding
 * to allow the characters to be referred by Unicode.
 * @author Paulo Soares
 */
public class FontSelector {

    private static final Logger LOGGER = LoggerFactory.getLogger(PdfSmartCopy.class);

    protected ArrayList<Font> fonts = new ArrayList<Font>();
    protected ArrayList<Font> unsupportedFonts = new ArrayList<Font>();
    protected Font currentFont = null;

    /**
     * Adds a <CODE>Font</CODE> to be searched for valid characters.
     * @param font the <CODE>Font</CODE>
     */
    public void addFont(Font font) {
        if (!isSupported(font)) {
            unsupportedFonts.add(font);
            return;
        }
        if (font.getBaseFont() != null) {
            fonts.add(font);
            return;
        }
        BaseFont bf = font.getCalculatedBaseFont(true);
        Font f2 = new Font(bf, font.getSize(), font.getCalculatedStyle(), font.getColor());
        fonts.add(f2);
    }

    /**
     * Process the text so that it will render with a combination of fonts
     * if needed.
     * @param text the text
     * @return a <CODE>Phrase</CODE> with one or more chunks
     */
    public Phrase process(String text) {
        if (getSize() == 0)
            throw new IndexOutOfBoundsException(MessageLocalization.getComposedMessage("no.font.is.defined"));
        char cc[] = text.toCharArray();
        int len = cc.length;
        StringBuffer sb = new StringBuffer();
        Phrase ret = new Phrase();
        currentFont = null;
        for (int k = 0; k < len; ++k) {
            Chunk newChunk = processChar(cc, k, sb);
            if (newChunk != null) {
                ret.add(newChunk);
            }
        }
        if (sb.length() > 0) {
            Chunk ck = new Chunk(sb.toString(), currentFont != null ? currentFont : getFont(0));
            ret.add(ck);
        }
        return ret;
    }

    protected Chunk processChar(char[] cc, int k, StringBuffer sb) {
        Chunk newChunk = null;
        char c = cc[k];
        if (c == '\n' || c == '\r') {
            sb.append(c);
        } else {
            Font font = null;
            if (Utilities.isSurrogatePair(cc, k)) {
                int u = Utilities.convertToUtf32(cc, k);
                for (int f = 0; f < getSize(); ++f) {
                    font = getFont(f);
                    if (font.getBaseFont().charExists(u) || Character.getType(u) == Character.FORMAT) {
                        if (currentFont != font) {
                            if (sb.length() > 0 && currentFont != null) {
                                newChunk = new Chunk(sb.toString(), currentFont);
                                sb.setLength(0);
                            }
                            currentFont = font;
                        }
                        sb.append(c);
                        sb.append(cc[++k]);
                        break;
                    }
                }
            } else {
                for (int f = 0; f < getSize(); ++f) {
                    font = getFont(f);
                    if (font.getBaseFont().charExists(c) || Character.getType(c) == Character.FORMAT) {
                        if (currentFont != font) {
                            if (sb.length() > 0 && currentFont != null) {
                                newChunk = new Chunk(sb.toString(), currentFont);
                                sb.setLength(0);
                            }
                            currentFont = font;
                        }
                        sb.append(c);
                        break;
                    }
                }
            }
        }
        return newChunk;
    }

    protected int getSize() {
        return fonts.size() + unsupportedFonts.size();
    }

    protected Font getFont(int i) {
        return i < fonts.size()
                ? fonts.get(i)
                : unsupportedFonts.get(i - fonts.size());
    }

    private boolean isSupported(Font font) {
        BaseFont bf = font.getBaseFont();
        if (bf instanceof TrueTypeFont && BaseFont.WINANSI.equals(bf.getEncoding()) && !((TrueTypeFont) bf).isWinAnsiSupported()) {
            LOGGER.warn(MessageFormat.format("cmap(1, 0) not found for TrueType Font {0}, it is required for WinAnsi encoding.", font));
            return false;
        }
        return true;
    }
}

⏎ com/itextpdf/text/pdf/FontSelector.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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⇒ iText-2.1.6.jar - iText, a JAVA-PDF library

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