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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; |
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use Exception; |
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use Smalot\PdfParser\Element\ElementNumeric; |
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use Smalot\PdfParser\Encoding\PostScriptGlyphs; |
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/** |
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* Class Encoding |
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*/ |
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class Encoding extends PDFObject |
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{ |
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/** |
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* @var array |
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*/ |
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protected $encoding; |
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/** |
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* @var array |
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*/ |
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protected $differences; |
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/** |
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* @var array |
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*/ |
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protected $mapping; |
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public function init() |
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{ |
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$this->mapping = []; |
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$this->differences = []; |
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$this->encoding = []; |
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if ($this->has('BaseEncoding')) { |
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$className = $this->getEncodingClass(); |
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$class = new $className(); |
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$this->encoding = $class->getTranslations(); |
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// Build table including differences. |
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2 |
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$differences = $this->get('Differences')->getContent(); |
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$code = 0; |
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if (!\is_array($differences)) { |
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return; |
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} |
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foreach ($differences as $difference) { |
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/** @var ElementNumeric $difference */ |
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if ($difference instanceof ElementNumeric) { |
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$code = $difference->getContent(); |
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continue; |
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} |
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// ElementName |
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$this->differences[$code] = $difference; |
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if (\is_object($difference)) { |
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$this->differences[$code] = $difference->getContent(); |
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} |
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// For the next char. |
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++$code; |
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} |
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$this->mapping = $this->encoding; |
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foreach ($this->differences as $code => $difference) { |
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/* @var string $difference */ |
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$this->mapping[$code] = $difference; |
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} |
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} |
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} |
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/** |
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* @return array |
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*/ |
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public function getDetails($deep = true) |
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{ |
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$details = []; |
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$details['BaseEncoding'] = ($this->has('BaseEncoding') ? (string) $this->get('BaseEncoding') : 'Ansi'); |
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$details['Differences'] = ($this->has('Differences') ? (string) $this->get('Differences') : ''); |
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$details += parent::getDetails($deep); |
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return $details; |
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} |
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/** |
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* @return int |
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*/ |
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public function translateChar($dec) |
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{ |
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if (isset($this->mapping[$dec])) { |
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$dec = $this->mapping[$dec]; |
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} |
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return PostScriptGlyphs::getCodePoint($dec); |
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} |
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/** |
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* Returns the name of the encoding class, if available. |
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* |
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* @return string |
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* |
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* @throws \Exception On PHP 7.4 an exception is thrown if encoding class doesn't exist. |
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*/ |
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public function __toString() |
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{ |
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try { |
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return $this->getEncodingClass(); |
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1 |
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} catch (Exception $e) { |
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// prior to PHP 7.4 toString has to return an empty string. |
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1 |
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if (version_compare(PHP_VERSION, '7.4.0', '<')) { |
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return ''; |
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} else { |
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1 |
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throw $e; |
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} |
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} |
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} |
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/** |
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* @return string |
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* |
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* @throws \Exception |
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*/ |
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4 |
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protected function getEncodingClass() |
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{ |
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// Load reference table charset. |
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$baseEncoding = preg_replace('/[^A-Z0-9]/is', '', $this->get('BaseEncoding')->getContent()); |
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$className = '\\Smalot\\PdfParser\\Encoding\\'.$baseEncoding; |
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if (!class_exists($className)) { |
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throw new Exception('Missing encoding data for: "'.$baseEncoding.'".'); |
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} |
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return $className; |
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} |
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} |
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smalot /
pdfparser
