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<?php /** * @file * This file is part of the PdfParser library. * * @author Sébastien MALOT <sebastien@malot.fr> * * @date 2017-01-03 * * @license LGPLv3 * * @url <https://github.com/smalot/pdfparser> * * PdfParser is a pdf library written in PHP, extraction oriented. * Copyright (C) 2017 - Sébastien MALOT <sebastien@malot.fr> * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * 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 Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program. * If not, see <http://www.pdfparser.org/sites/default/LICENSE.txt>. */ namespace Smalot\PdfParser\Element; use Smalot\PdfParser\Document; use Smalot\PdfParser\Element; /** * Class ElementXRef */ class ElementXRef extends Element { public function getId(): string { return $this->getContent(); } public function getObject() { return $this->document->getObjectById($this->getId()); } public function equals($value): bool { /** * In case $value is a number and $this->value is a string like 5_0 * * Without this if-clause code like: * * $element = new ElementXRef('5_0'); * $this->assertTrue($element->equals(5)); * * would fail (= 5_0 and 5 are not equal in PHP 8.0+). */ if ( true === is_numeric($value) && true === \is_string($this->getContent()) && 1 === preg_match('/[0-9]+\_[0-9]+/', $this->getContent(), $matches) ) { return (float) $this->getContent() == $value; } $id = ($value instanceof self) ? $value->getId() : $value; return $this->getId() == $id; } public function __toString(): string { return '#Obj#'.$this->getId(); } /** * @return bool|ElementXRef */ public static function parse(string $content, ?Document $document = null, int &$offset = 0) { if (preg_match('/^\s*(?P<id>[0-9]+\s+[0-9]+\s+R)/s', $content, $match)) { $id = $match['id']; $offset += strpos($content, $id) + \strlen($id); $id = str_replace(' ', '_', rtrim($id, ' R')); return new self($id, $document); } return false; } }
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