mxchat-basic / includes / pdf-parser / src / Smalot / PdfParser / Encoding.php

Encoding.php in MxChat – AI Chatbot & Content Generation for WordPress 3.2.4, at includes/pdf-parser/src/Smalot/PdfParser/Encoding.php

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1	<?php
2
3	/**
4	* @file
5	* This file is part of the PdfParser library.
6	*
7	* @author Sébastien MALOT <sebastien@malot.fr>
8	*
9	* @date 2017-01-03
10	*
11	* @license LGPLv3
12	*
13	* @url <https://github.com/smalot/pdfparser>
14	*
15	* PdfParser is a pdf library written in PHP, extraction oriented.
16	* Copyright (C) 2017 - Sébastien MALOT <sebastien@malot.fr>
17	*
18	* This program is free software: you can redistribute it and/or modify
19	* it under the terms of the GNU Lesser General Public License as published by
20	* the Free Software Foundation, either version 3 of the License, or
21	* (at your option) any later version.
22	*
23	* This program is distributed in the hope that it will be useful,
24	* but WITHOUT ANY WARRANTY; without even the implied warranty of
25	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26	* GNU Lesser General Public License for more details.
27	*
28	* You should have received a copy of the GNU Lesser General Public License
29	* along with this program.
30	* If not, see <http://www.pdfparser.org/sites/default/LICENSE.txt>.
31	*/
32
33	namespace Smalot\PdfParser;
34
35	use Smalot\PdfParser\Element\ElementNumeric;
36	use Smalot\PdfParser\Encoding\EncodingLocator;
37	use Smalot\PdfParser\Encoding\PostScriptGlyphs;
38	use Smalot\PdfParser\Exception\EncodingNotFoundException;
39
40	/**
41	* Class Encoding
42	*/
43	class Encoding extends PDFObject
44	{
45	/**
46	* @var array
47	*/
48	protected $encoding;
49
50	/**
51	* @var array
52	*/
53	protected $differences;
54
55	/**
56	* @var array
57	*/
58	protected $mapping;
59
60	public function init()
61	{
62	$this->mapping = [];
63	$this->differences = [];
64	$this->encoding = [];
65
66	if ($this->has('BaseEncoding')) {
67	$this->encoding = EncodingLocator::getEncoding($this->getEncodingClass())->getTranslations();
68
69	// Build table including differences.
70	$differences = $this->get('Differences')->getContent();
71	$code = 0;
72
73	if (!\is_array($differences)) {
74	return;
75	}
76
77	foreach ($differences as $difference) {
78	/** @var ElementNumeric $difference */
79	if ($difference instanceof ElementNumeric) {
80	$code = $difference->getContent();
81	continue;
82	}
83
84	// ElementName
85	$this->differences[$code] = $difference;
86	if (\is_object($difference)) {
87	$this->differences[$code] = $difference->getContent();
88	}
89
90	// For the next char.
91	++$code;
92	}
93
94	$this->mapping = $this->encoding;
95	foreach ($this->differences as $code => $difference) {
96	/* @var string $difference */
97	$this->mapping[$code] = $difference;
98	}
99	}
100	}
101
102	public function getDetails(bool $deep = true): array
103	{
104	$details = [];
105
106	$details['BaseEncoding'] = ($this->has('BaseEncoding') ? (string) $this->get('BaseEncoding') : 'Ansi');
107	$details['Differences'] = ($this->has('Differences') ? (string) $this->get('Differences') : '');
108
109	$details += parent::getDetails($deep);
110
111	return $details;
112	}
113
114	public function translateChar($dec): ?int
115	{
116	if (isset($this->mapping[$dec])) {
117	$dec = $this->mapping[$dec];
118	}
119
120	return PostScriptGlyphs::getCodePoint($dec);
121	}
122
123	/**
124	* Returns encoding class name if available or empty string (only prior PHP 7.4).
125	*
126	* @throws \Exception On PHP 7.4+ an exception is thrown if encoding class doesn't exist.
127	*/
128	public function __toString(): string
129	{
130	try {
131	return $this->getEncodingClass();
132	} catch (\Exception $e) {
133	// prior to PHP 7.4 toString has to return an empty string.
134	if (version_compare(\PHP_VERSION, '7.4.0', '<')) {
135	return '';
136	}
137	throw $e;
138	}
139	}
140
141	/**
142	* @throws EncodingNotFoundException
143	*/
144	protected function getEncodingClass(): string
145	{
146	// Load reference table charset.
147	$baseEncoding = preg_replace('/[^A-Z0-9]/is', '', $this->get('BaseEncoding')->getContent());
148
149	// Check for empty BaseEncoding field value
150	if (!\is_string($baseEncoding) \|\| 0 == \strlen($baseEncoding)) {
151	$baseEncoding = 'StandardEncoding';
152	}
153
154	$className = '\\Smalot\\PdfParser\\Encoding\\'.$baseEncoding;
155
156	if (!class_exists($className)) {
157	throw new EncodingNotFoundException('Missing encoding data for: "'.$baseEncoding.'".');
158	}
159
160	return $className;
161	}
162	}
163