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:

⏎ com/itextpdf/layout/font/FontInfo.java

/*
    This file is part of the iText (R) project.
    Copyright (c) 1998-2018 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.layout.font;

import com.itextpdf.io.font.FontCacheKey;
import com.itextpdf.io.font.FontProgram;
import com.itextpdf.io.font.FontProgramDescriptor;
import com.itextpdf.io.font.FontProgramDescriptorFactory;
import com.itextpdf.io.util.ArrayUtil;
import com.itextpdf.io.util.MessageFormatUtil;
import com.itextpdf.kernel.font.PdfFont;

import java.util.Arrays;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

/**
 * Contains all font related data to create {@link FontProgram} and {@link PdfFont}.
 * {@link FontProgramDescriptor} fetches with {@link FontProgramDescriptorFactory}.
 *
 * @see FontProvider#getPdfFont(FontInfo)
 * @see FontProvider#getPdfFont(FontInfo, FontSet)
 * <p>
 * Note, {@link #getAlias()} and {@link #getDescriptor()} do not taken into account in {@link #equals},
 * the same font with different aliases will have equal FontInfo's,
 * and therefore the same {@link PdfFont} in the end document.
 */
public final class FontInfo {

    private static final Map<FontCacheKey, FontProgramDescriptor> fontNamesCache = new ConcurrentHashMap<>();

    private final String fontName;
    private final byte[] fontData;
    private final FontProgramDescriptor descriptor;
    private final Range range;
    private final int hash;
    private final String encoding;
    private final String alias;

    private FontInfo(String fontName, byte[] fontData, String encoding, FontProgramDescriptor descriptor,
                     Range unicodeRange, String alias) {
        this.fontName = fontName;
        this.fontData = fontData;
        this.encoding = encoding;
        this.descriptor = descriptor;
        this.range = unicodeRange != null ? unicodeRange : RangeBuilder.getFullRange();
        this.alias = alias != null ? alias.toLowerCase() : null;
        this.hash = calculateHashCode(this.fontName, this.fontData, this.encoding, this.range);
    }

    public static FontInfo create(FontInfo fontInfo, String alias, Range range) {
        return new FontInfo(fontInfo.fontName, fontInfo.fontData, fontInfo.encoding,
                fontInfo.descriptor, range, alias);
    }

    public static FontInfo create(FontInfo fontInfo, String alias) {
        return create(fontInfo, alias, null);
    }

    public static FontInfo create(FontProgram fontProgram, String encoding, String alias, Range range) {
        FontProgramDescriptor descriptor = FontProgramDescriptorFactory.fetchDescriptor(fontProgram);
        return new FontInfo(descriptor.getFontName(), null, encoding, descriptor, range, alias);
    }

    public static FontInfo create(FontProgram fontProgram, String encoding, String alias) {
        return create(fontProgram, encoding, alias, null);
    }

    static FontInfo create(String fontName, String encoding, String alias, Range range) {
        FontCacheKey cacheKey = FontCacheKey.create(fontName);
        FontProgramDescriptor descriptor = getFontNamesFromCache(cacheKey);
        if (descriptor == null) {
            descriptor = FontProgramDescriptorFactory.fetchDescriptor(fontName);
            putFontNamesToCache(cacheKey, descriptor);
        }
        return descriptor != null ? new FontInfo(fontName, null, encoding, descriptor, range, alias) : null;
    }

    static FontInfo create(byte[] fontProgram, String encoding, String alias, Range range) {
        FontCacheKey cacheKey = FontCacheKey.create(fontProgram);
        FontProgramDescriptor descriptor = getFontNamesFromCache(cacheKey);
        if (descriptor == null) {
            descriptor = FontProgramDescriptorFactory.fetchDescriptor(fontProgram);
            putFontNamesToCache(cacheKey, descriptor);
        }
        return descriptor != null ? new FontInfo(null, fontProgram, encoding, descriptor, range, alias) : null;
    }

    public FontProgramDescriptor getDescriptor() {
        return descriptor;
    }

    //shall not be null
    public Range getFontUnicodeRange() {
        return range;
    }

    /**
     * Gets path to font, if {@link FontInfo} was created by String.
     * Note, to get PostScript or full name, use {@link #getDescriptor()}.
     * @return the font name
     */
    public String getFontName() {
        return fontName;
    }

    /**
     * Gets font data, if {@link FontInfo} was created with {@code byte[]}.
     */
    public byte[] getFontData() {
        return fontData;
    }

    public String getEncoding() {
        return encoding;
    }

    /**
     * Gets font alias.
     *
     * @return alias if exist, otherwise null.
     */
    public String getAlias() {
        return alias;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (!(o instanceof FontInfo)) return false;

        FontInfo that = (FontInfo) o;
        return (fontName != null ? fontName.equals(that.fontName) : that.fontName == null)
                && range.equals(that.range)
                && Arrays.equals(fontData, that.fontData)
                && (encoding != null ? encoding.equals(that.encoding) : that.encoding == null);
    }

    @Override
    public int hashCode() {
        return hash;
    }

    @Override
    public String toString() {
        String name = descriptor.getFontName();
        if (name.length() > 0) {
            if (encoding != null) {
                return MessageFormatUtil.format("{0}+{1}", name, encoding);
            } else {
                return name;
            }
        }
        return super.toString();
    }

    private static int calculateHashCode(String fontName, byte[] bytes, String encoding,
                                         Range range) {
        int result = fontName != null ? fontName.hashCode() : 0;
        result = 31 * result + ArrayUtil.hashCode(bytes);
        result = 31 * result + (encoding != null ? encoding.hashCode() : 0);
        result = 31 * result + range.hashCode();
        return result;
    }

    private static FontProgramDescriptor getFontNamesFromCache(FontCacheKey key) {
        return fontNamesCache.get(key);
    }

    private static void putFontNamesToCache(FontCacheKey key, FontProgramDescriptor descriptor) {
        if (descriptor != null) {
            fontNamesCache.put(key, descriptor);
        }
    }
}

⏎ com/itextpdf/layout/font/FontInfo.java

Or download all of them as a single archive file:

File name: layout-7.1.4-sources.jar
File size: 446816 bytes
Release date: 2018-10-09
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