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pdfHTML is an iText add-on that lets you to parse (X)HTML snippets and the associated CSS and converts them to PDF.
There is a newer version: 5.0.5
/*
    This file is part of the iText (R) project.
    Copyright (c) 1998-2017 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: [email protected]
 */
package com.itextpdf.html2pdf.css.media;

/**
 * Class that bundles all the media feature values.
 */
public final class MediaFeature {

    /**
     * Creates a new {@link MediaFeature} instance.
     */
    private MediaFeature() {
    }

    /**
     * Value: <integer>

     * Media: visual

     * Accepts min/max prefixes: yes

     * Indicates the number of bits per color component of the output device. If the device is not a color device, this value is zero.
     */
    public static final String COLOR = "color";

    /**
     * Value: <integer>

     * Media: visual

     * Accepts min/max prefixes: yes

     * Indicates the number of entries in the color look-up table for the output device.
     */
    public static final String COLOR_INDEX = "color-index";

    /**
     * Value: <ratio>

     * Media: visual, tactile

     * Accepts min/max prefixes: yes

     * Describes the aspect ratio of the targeted display area of the output device.
     * This value consists of two positive integers separated by a slash ("/") character.
     * This represents the ratio of horizontal pixels (first term) to vertical pixels (second term).
     */
    public static final String ASPECT_RATIO = "aspect-ratio";

    /**
     * Value: <mq-boolean> which is an <integer> that can only have the 0 and 1 value.

     * Media: all

     * Accepts min/max prefixes: no

     * Determines whether the output device is a grid device or a bitmap device.
     * If the device is grid-based (such as a TTY terminal or a phone display with only one font),
     * the value is 1. Otherwise it is zero.
     */
    public static final String GRID = "grid";

    /**
     * Value: progressive | interlace

     * Media: tv

     * Accepts min/max prefixes: no

     * Describes the scanning process of television output devices.
     */
    public static final String SCAN = "scan";

    /**
     * Value: landscape | portrait

     * Media: visual

     * Accepts min/max prefixes: no

     * Indicates whether the viewport is in landscape (the display is wider than it is tall) or
     * portrait (the display is taller than it is wide) mode.
     */
    public static final String ORIENTATION = "orientation";

    /**
     * Value: <integer>

     * Media: visual

     * Accepts min/max prefixes: yes

     * Indicates the number of bits per pixel on a monochrome (greyscale) device.
     * If the device isn't monochrome, the device's value is 0.
     */
    public static final String MONOCHROME = "monochrome";

    /**
     * Value: <length>

     * Media: visual, tactile

     * Accepts min/max prefixes: yes

     * The height media feature describes the height of the output device's rendering surface
     * (such as the height of the viewport or of the page box on a printer).
     */
    public static final String HEIGHT = "height";

    /**
     * Value: <resolution>

     * Media: bitmap

     * Accepts min/max prefixes: yes

     * Indicates the resolution (pixel density) of the output device. The resolution may be specified in
     * either dots per inch (dpi) or dots per centimeter (dpcm).
     */
    public static final String RESOLUTION = "resolution";

    /**
     * Value: <length>

     * Media: visual, tactile

     * Accepts min/max prefixes: yes

     * The width media feature describes the width of the rendering surface of the output device
     * (such as the width of the document window, or the width of the page box on a printer).
     */
    public static final String WIDTH = "width";


}