1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
<?php
namespace Masterminds\HTML5\Parser;
/**
* Handles special-case rules for the DOM tree builder.
*
* Many tags have special rules that need to be accomodated on an
* individual basis. This class handles those rules.
*
* See section 8.1.2.4 of the spec.
*
* @todo - colgroup and col special behaviors
* - body and head special behaviors
*/
class TreeBuildingRules
{
protected static $tags = array(
'li' => 1,
'dd' => 1,
'dt' => 1,
'rt' => 1,
'rp' => 1,
'tr' => 1,
'th' => 1,
'td' => 1,
'thead' => 1,
'tfoot' => 1,
'tbody' => 1,
'table' => 1,
'optgroup' => 1,
'option' => 1
);
/**
* Build a new rules engine.
*
* @param \DOMDocument $doc
* The DOM document to use for evaluation and modification.
*/
public function __construct($doc)
{
$this->doc = $doc;
}
/**
* Returns TRUE if the given tagname has special processing rules.
*/
public function hasRules($tagname)
{
return isset(static::$tags[$tagname]);
}
/**
* Evaluate the rule for the current tag name.
*
* This may modify the existing DOM.
*
* @return \DOMElement The new Current DOM element.
*/
public function evaluate($new, $current)
{
switch ($new->tagName) {
case 'li':
return $this->handleLI($new, $current);
case 'dt':
case 'dd':
return $this->handleDT($new, $current);
case 'rt':
case 'rp':
return $this->handleRT($new, $current);
case 'optgroup':
return $this->closeIfCurrentMatches($new, $current, array(
'optgroup'
));
case 'option':
return $this->closeIfCurrentMatches($new, $current, array(
'option',
'optgroup'
));
case 'tr':
return $this->closeIfCurrentMatches($new, $current, array(
'tr'
));
case 'td':
case 'th':
return $this->closeIfCurrentMatches($new, $current, array(
'th',
'td'
));
case 'tbody':
case 'thead':
case 'tfoot':
case 'table': // Spec isn't explicit about this, but it's necessary.
return $this->closeIfCurrentMatches($new, $current, array(
'thead',
'tfoot',
'tbody'
));
}
return $current;
}
protected function handleLI($ele, $current)
{
return $this->closeIfCurrentMatches($ele, $current, array(
'li'
));
}
protected function handleDT($ele, $current)
{
return $this->closeIfCurrentMatches($ele, $current, array(
'dt',
'dd'
));
}
protected function handleRT($ele, $current)
{
return $this->closeIfCurrentMatches($ele, $current, array(
'rt',
'rp'
));
}
protected function closeIfCurrentMatches($ele, $current, $match)
{
$tname = $current->tagName;
if (in_array($current->tagName, $match)) {
$current->parentNode->appendChild($ele);
} else {
$current->appendChild($ele);
}
return $ele;
}
}
|
