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

Element.php in MxChat – AI Chatbot & Content Generation for WordPress 2.4.6, at includes/pdf-parser/src/Smalot/PdfParser/Element.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\ElementArray;
36	use Smalot\PdfParser\Element\ElementBoolean;
37	use Smalot\PdfParser\Element\ElementDate;
38	use Smalot\PdfParser\Element\ElementHexa;
39	use Smalot\PdfParser\Element\ElementName;
40	use Smalot\PdfParser\Element\ElementNull;
41	use Smalot\PdfParser\Element\ElementNumeric;
42	use Smalot\PdfParser\Element\ElementString;
43	use Smalot\PdfParser\Element\ElementStruct;
44	use Smalot\PdfParser\Element\ElementXRef;
45
46	/**
47	* Class Element
48	*/
49	class Element
50	{
51	/**
52	* @var Document\|null
53	*/
54	protected $document;
55
56	protected $value;
57
58	public function __construct($value, ?Document $document = null)
59	{
60	$this->value = $value;
61	$this->document = $document;
62	}
63
64	public function init()
65	{
66	}
67
68	public function equals($value): bool
69	{
70	return $value == $this->value;
71	}
72
73	public function contains($value): bool
74	{
75	if (\is_array($this->value)) {
76	/** @var Element $val */
77	foreach ($this->value as $val) {
78	if ($val->equals($value)) {
79	return true;
80	}
81	}
82
83	return false;
84	}
85
86	return $this->equals($value);
87	}
88
89	public function getContent()
90	{
91	return $this->value;
92	}
93
94	public function __toString(): string
95	{
96	return (string) $this->value;
97	}
98
99	public static function parse(string $content, ?Document $document = null, int &$position = 0)
100	{
101	$args = \func_get_args();
102	$only_values = isset($args[3]) ? $args[3] : false;
103	$content = trim($content);
104	$values = [];
105
106	do {
107	$old_position = $position;
108
109	if (!$only_values) {
110	if (!preg_match('/\G\s(?P<name>\/[A-Z#0-9\._]+)(?P<value>.)/si', $content, $match, 0, $position)) {
111	break;
112	} else {
113	$name = preg_replace_callback(
114	'/#([0-9a-f]{2})/i',
115	function ($m) {
116	return \chr(base_convert($m[1], 16, 10));
117	},
118	ltrim($match['name'], '/')
119	);
120	$value = $match['value'];
121	$position = strpos($content, $value, $position + \strlen($match['name']));
122	}
123	} else {
124	$name = \count($values);
125	$value = substr($content, $position);
126	}
127
128	if ($element = ElementName::parse($value, $document, $position)) {
129	$values[$name] = $element;
130	} elseif ($element = ElementXRef::parse($value, $document, $position)) {
131	$values[$name] = $element;
132	} elseif ($element = ElementNumeric::parse($value, $document, $position)) {
133	$values[$name] = $element;
134	} elseif ($element = ElementStruct::parse($value, $document, $position)) {
135	$values[$name] = $element;
136	} elseif ($element = ElementBoolean::parse($value, $document, $position)) {
137	$values[$name] = $element;
138	} elseif ($element = ElementNull::parse($value, $document, $position)) {
139	$values[$name] = $element;
140	} elseif ($element = ElementDate::parse($value, $document, $position)) {
141	$values[$name] = $element;
142	} elseif ($element = ElementString::parse($value, $document, $position)) {
143	$values[$name] = $element;
144	} elseif ($element = ElementHexa::parse($value, $document, $position)) {
145	$values[$name] = $element;
146	} elseif ($element = ElementArray::parse($value, $document, $position)) {
147	$values[$name] = $element;
148	} else {
149	$position = $old_position;
150	break;
151	}
152	} while ($position < \strlen($content));
153
154	return $values;
155	}
156	}
157