windpress / vendor / enshrined / svg-sanitize / src / ElementReference / Subject.php

Subject.php in WindPress – Tailwind CSS integration for WordPress 3.2.90, at vendor/enshrined/svg-sanitize/src/ElementReference/Subject.php

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1	<?php
2
3	namespace WindPressDeps\enshrined\svgSanitize\ElementReference;
4
5	class Subject
6	{
7	/**
8	* @var \DOMElement
9	*/
10	protected $element;
11	/**
12	* @var Usage[]
13	*/
14	protected $useCollection = [];
15	/**
16	* @var Usage[]
17	*/
18	protected $usedInCollection = [];
19	/**
20	* @var int
21	*/
22	protected $useNestingLimit;
23	/**
24	* Subject constructor.
25	*
26	* @param \DOMElement $element
27	* @param int $useNestingLimit
28	*/
29	public function __construct(\DOMElement $element, $useNestingLimit)
30	{
31	$this->element = $element;
32	$this->useNestingLimit = $useNestingLimit;
33	}
34	/**
35	* @return \DOMElement
36	*/
37	public function getElement()
38	{
39	return $this->element;
40	}
41	/**
42	* @return string
43	*/
44	public function getElementId()
45	{
46	return $this->element->getAttribute('id');
47	}
48	/**
49	* @param array $subjects Previously processed subjects
50	* @param int $level The current level of nesting.
51	* @return bool
52	* @throws \enshrined\svgSanitize\Exceptions\NestingException
53	*/
54	public function hasInfiniteLoop(array $subjects = [], $level = 1)
55	{
56	if ($level > $this->useNestingLimit) {
57	throw new \WindPressDeps\enshrined\svgSanitize\Exceptions\NestingException('Nesting level too high, aborting', 1570713498, null, $this->getElement());
58	}
59	if (in_array($this, $subjects, \true)) {
60	return \true;
61	}
62	$subjects[] = $this;
63	foreach ($this->useCollection as $usage) {
64	if ($usage->getSubject()->hasInfiniteLoop($subjects, $level + 1)) {
65	return \true;
66	}
67	}
68	return \false;
69	}
70	/**
71	* @param Subject $subject
72	*/
73	public function addUse(Subject $subject)
74	{
75	if ($subject === $this) {
76	throw new \LogicException('Cannot add self usage', 1570713416);
77	}
78	$identifier = $subject->getElementId();
79	if (isset($this->useCollection[$identifier])) {
80	$this->useCollection[$identifier]->increment();
81	return;
82	}
83	$this->useCollection[$identifier] = new Usage($subject);
84	}
85	/**
86	* @param Subject $subject
87	*/
88	public function addUsedIn(Subject $subject)
89	{
90	if ($subject === $this) {
91	throw new \LogicException('Cannot add self as usage', 1570713417);
92	}
93	$identifier = $subject->getElementId();
94	if (isset($this->usedInCollection[$identifier])) {
95	$this->usedInCollection[$identifier]->increment();
96	return;
97	}
98	$this->usedInCollection[$identifier] = new Usage($subject);
99	}
100	/**
101	* @param bool $accumulated
102	* @return int
103	*/
104	public function countUse($accumulated = \false)
105	{
106	$count = 0;
107	foreach ($this->useCollection as $use) {
108	$useCount = $use->getSubject()->countUse();
109	$count += $use->getCount() * ($accumulated ? 1 + $useCount : max(1, $useCount));
110	}
111	return $count;
112	}
113	/**
114	* @return int
115	*/
116	public function countUsedIn()
117	{
118	$count = 0;
119	foreach ($this->usedInCollection as $usedIn) {
120	$count += $usedIn->getCount() * max(1, $usedIn->getSubject()->countUsedIn());
121	}
122	return $count;
123	}
124	/**
125	* Clear the internal arrays (to free up memory as they can get big)
126	* and return all the child usages DOMElement's
127	*
128	* @return array
129	*/
130	public function clearInternalAndGetAffectedElements()
131	{
132	$elements = array_map(function (Usage $usage) {
133	return $usage->getSubject()->getElement();
134	}, $this->useCollection);
135	$this->usedInCollection = [];
136	$this->useCollection = [];
137	return $elements;
138	}
139	}
140