fpdi-cn/Fpdi/PdfReader/PageBoundaries.php

<?php

/**
 * This file is part of FPDI
 *
 * @package   Fpdi
 * @copyright Copyright (c) 2020 Setasign GmbH & Co. KG (https://www.setasign.com)
 * @license   http://opensource.org/licenses/mit-license The MIT License
 */

namespace Fpdi\PdfReader;

/**
 * An abstract class for page boundary constants and some helper methods
 */
abstract class PageBoundaries
{
    /**
     * MediaBox
     *
     * The media box defines the boundaries of the physical medium on which the page is to be printed.
     *
     * @see PDF 32000-1:2008 - 14.11.2 Page Boundaries
     * @var string
     */
    const MEDIA_BOX = 'MediaBox';

    /**
     * CropBox
     *
     * The crop box defines the region to which the contents of the page shall be clipped (cropped) when displayed or
     * printed.
     *
     * @see PDF 32000-1:2008 - 14.11.2 Page Boundaries
     * @var string
     */
    const CROP_BOX = 'CropBox';

    /**
     * BleedBox
     *
     * The bleed box defines the region to which the contents of the page shall be clipped when output in a
     * production environment.
     *
     * @see PDF 32000-1:2008 - 14.11.2 Page Boundaries
     * @var string
     */
    const BLEED_BOX = 'BleedBox';

    /**
     * TrimBox
     *
     * The trim box defines the intended dimensions of the finished page after trimming.
     *
     * @see PDF 32000-1:2008 - 14.11.2 Page Boundaries
     * @var string
     */
    const TRIM_BOX = 'TrimBox';

    /**
     * ArtBox
     *
     * The art box defines the extent of the page’s meaningful content (including potential white space) as intended
     * by the page’s creator.
     *
     * @see PDF 32000-1:2008 - 14.11.2 Page Boundaries
     * @var string
     */
    const ART_BOX = 'ArtBox';

    /**
     * All page boundaries
     *
     * @var array
     */
    public static $all = array(
        self::MEDIA_BOX,
        self::CROP_BOX,
        self::BLEED_BOX,
        self::TRIM_BOX,
        self::ART_BOX
    );

    /**
     * Checks if a name is a valid page boundary name.
     *
     * @param string $name The boundary name
     * @return boolean A boolean value whether the name is valid or not.
     */
    public static function isValidName($name)
    {
        return \in_array($name, self::$all, true);
    }
}