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