wp-parsely / vendor / masterminds / html5 / src / HTML5 / Parser / TreeBuildingRules.php

TreeBuildingRules.php in Parse.ly 3.19.1, at vendor/masterminds/html5/src/HTML5/Parser/TreeBuildingRules.php

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1	<?php
2
3	namespace Masterminds\HTML5\Parser;
4
5	/**
6	* Handles special-case rules for the DOM tree builder.
7	*
8	* Many tags have special rules that need to be accomodated on an
9	* individual basis. This class handles those rules.
10	*
11	* See section 8.1.2.4 of the spec.
12	*
13	* @todo - colgroup and col special behaviors
14	* - body and head special behaviors
15	*/
16	class TreeBuildingRules
17	{
18	protected static $tags = array(
19	'li' => 1,
20	'dd' => 1,
21	'dt' => 1,
22	'rt' => 1,
23	'rp' => 1,
24	'tr' => 1,
25	'th' => 1,
26	'td' => 1,
27	'thead' => 1,
28	'tfoot' => 1,
29	'tbody' => 1,
30	'table' => 1,
31	'optgroup' => 1,
32	'option' => 1,
33	);
34
35	/**
36	* Returns true if the given tagname has special processing rules.
37	*/
38	public function hasRules($tagname)
39	{
40	return isset(static::$tags[$tagname]);
41	}
42
43	/**
44	* Evaluate the rule for the current tag name.
45	*
46	* This may modify the existing DOM.
47	*
48	* @return \DOMElement The new Current DOM element.
49	*/
50	public function evaluate($new, $current)
51	{
52	switch ($new->tagName) {
53	case 'li':
54	return $this->handleLI($new, $current);
55	case 'dt':
56	case 'dd':
57	return $this->handleDT($new, $current);
58	case 'rt':
59	case 'rp':
60	return $this->handleRT($new, $current);
61	case 'optgroup':
62	return $this->closeIfCurrentMatches($new, $current, array(
63	'optgroup',
64	));
65	case 'option':
66	return $this->closeIfCurrentMatches($new, $current, array(
67	'option',
68	));
69	case 'tr':
70	return $this->closeIfCurrentMatches($new, $current, array(
71	'tr',
72	));
73	case 'td':
74	case 'th':
75	return $this->closeIfCurrentMatches($new, $current, array(
76	'th',
77	'td',
78	));
79	case 'tbody':
80	case 'thead':
81	case 'tfoot':
82	case 'table': // Spec isn't explicit about this, but it's necessary.
83
84	return $this->closeIfCurrentMatches($new, $current, array(
85	'thead',
86	'tfoot',
87	'tbody',
88	));
89	}
90
91	return $current;
92	}
93
94	protected function handleLI($ele, $current)
95	{
96	return $this->closeIfCurrentMatches($ele, $current, array(
97	'li',
98	));
99	}
100
101	protected function handleDT($ele, $current)
102	{
103	return $this->closeIfCurrentMatches($ele, $current, array(
104	'dt',
105	'dd',
106	));
107	}
108
109	protected function handleRT($ele, $current)
110	{
111	return $this->closeIfCurrentMatches($ele, $current, array(
112	'rt',
113	'rp',
114	));
115	}
116
117	protected function closeIfCurrentMatches($ele, $current, $match)
118	{
119	if (in_array($current->tagName, $match, true)) {
120	$current->parentNode->appendChild($ele);
121	} else {
122	$current->appendChild($ele);
123	}
124
125	return $ele;
126	}
127	}
128