-
Notifications
You must be signed in to change notification settings - Fork 117
/
selector.inc
169 lines (149 loc) · 6.19 KB
/
selector.inc
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
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
<?php
// --- Selector.inc - (c) Copyright TJ Holowaychuk <tj@vision-media.ca> MIT Licensed
define('SELECTOR_VERSION', '1.1.6');
/**
* SelectorDOM.
*
* Persitant object for selecting elements.
*
* $dom = new SelectorDOM($html);
* $links = $dom->select('a');
* $list_links = $dom->select('ul li a');
*
*/
class SelectorDOM {
public function __construct($data) {
if ($data instanceof DOMDocument) {
$this->xpath = new DOMXpath($data);
} else {
$dom = new DOMDocument();
@$dom->loadHTML($data);
$this->xpath = new DOMXpath($dom);
}
}
public function select($selector, $as_array = true) {
$elements = $this->xpath->evaluate(selector_to_xpath($selector));
return $as_array ? elements_to_array($elements) : $elements;
}
}
/**
* Select elements from $html using the css $selector.
* When $as_array is true elements and their children will
* be converted to array's containing the following keys (defaults to true):
*
* - name : element name
* - text : element text
* - children : array of children elements
* - attributes : attributes array
*
* Otherwise regular DOMElement's will be returned.
*/
function select_elements($selector, $html, $as_array = true) {
$dom = new SelectorDOM($html);
return $dom->select($selector, $as_array);
}
/**
* Convert $elements to an array.
*/
function elements_to_array($elements) {
$array = array();
for ($i = 0, $length = $elements->length; $i < $length; ++$i)
if ($elements->item($i)->nodeType == XML_ELEMENT_NODE)
array_push($array, element_to_array($elements->item($i)));
return $array;
}
/**
* Convert $element to an array.
*/
function element_to_array($element) {
$array = array(
'name' => $element->nodeName,
'attributes' => array(),
'text' => $element->textContent,
'children' =>elements_to_array($element->childNodes)
);
if ($element->attributes->length)
foreach($element->attributes as $key => $attr)
$array['attributes'][$key] = $attr->value;
return $array;
}
/**
* Convert $selector into an XPath string.
*/
function selector_to_xpath($selector) {
// remove spaces around operators
$selector = preg_replace('/\s*>\s*/', '>', $selector);
$selector = preg_replace('/\s*~\s*/', '~', $selector);
$selector = preg_replace('/\s*\+\s*/', '+', $selector);
$selector = preg_replace('/\s*,\s*/', ',', $selector);
$selectors = preg_split('/\s+(?![^\[]+\])/', $selector);
foreach ($selectors as &$selector) {
// ,
$selector = preg_replace('/,/', '|descendant-or-self::', $selector);
// input:checked, :disabled, etc.
$selector = preg_replace('/(.+)?:(checked|disabled|required|autofocus)/', '\1[@\2="\2"]', $selector);
// input:autocomplete, :autocomplete
$selector = preg_replace('/(.+)?:(autocomplete)/', '\1[@\2="on"]', $selector);
// input:button, input:submit, etc.
$selector = preg_replace('/:(text|password|checkbox|radio|button|submit|reset|file|hidden|image|datetime|datetime-local|date|month|time|week|number|range|email|url|search|tel|color)/', 'input[@type="\1"]', $selector);
// foo[id]
$selector = preg_replace('/(\w+)\[([_\w-]+[_\w\d-]*)\]/', '\1[@\2]', $selector);
// [id]
$selector = preg_replace('/\[([_\w-]+[_\w\d-]*)\]/', '*[@\1]', $selector);
// foo[id=foo]
$selector = preg_replace('/\[([_\w-]+[_\w\d-]*)=[\'"]?(.*?)[\'"]?\]/', '[@\1="\2"]', $selector);
// [id=foo]
$selector = preg_replace('/^\[/', '*[', $selector);
// div#foo
$selector = preg_replace('/([_\w-]+[_\w\d-]*)\#([_\w-]+[_\w\d-]*)/', '\1[@id="\2"]', $selector);
// #foo
$selector = preg_replace('/\#([_\w-]+[_\w\d-]*)/', '*[@id="\1"]', $selector);
// div.foo
$selector = preg_replace('/([_\w-]+[_\w\d-]*)\.([_\w-]+[_\w\d-]*)/', '\1[contains(concat(" ",@class," ")," \2 ")]', $selector);
// .foo
$selector = preg_replace('/\.([_\w-]+[_\w\d-]*)/', '*[contains(concat(" ",@class," ")," \1 ")]', $selector);
// div:first-child
$selector = preg_replace('/([_\w-]+[_\w\d-]*):first-child/', '*/\1[position()=1]', $selector);
// div:last-child
$selector = preg_replace('/([_\w-]+[_\w\d-]*):last-child/', '*/\1[position()=last()]', $selector);
// :first-child
$selector = str_replace(':first-child', '*/*[position()=1]', $selector);
// :last-child
$selector = str_replace(':last-child', '*/*[position()=last()]', $selector);
// :nth-last-child
$selector = preg_replace('/:nth-last-child\((\d+)\)/', '[position()=(last() - (\1 - 1))]', $selector);
// div:nth-child
$selector = preg_replace('/([_\w-]+[_\w\d-]*):nth-child\((\d+)\)/', '*/*[position()=\2 and self::\1]', $selector);
// :nth-child
$selector = preg_replace('/:nth-child\((\d+)\)/', '*/*[position()=\1]', $selector);
// :contains(Foo)
$selector = preg_replace('/([_\w-]+[_\w\d-]*):contains\((.*?)\)/', '\1[contains(string(.),"\2")]', $selector);
// >
$selector = preg_replace('/>/', '/', $selector);
// ~
$selector = preg_replace('/~/', '/following-sibling::', $selector);
// +
$selector = preg_replace('/\+([_\w-]+[_\w\d-]*)/', '/following-sibling::\1[position()=1]', $selector);
$selector = str_replace(']*', ']', $selector);
$selector = str_replace(']/*', ']', $selector);
}
// ' '
$selector = implode('/descendant::', $selectors);
$selector = 'descendant-or-self::' . $selector;
// :scope
$selector = preg_replace('/(((\|)?descendant-or-self::):scope)/', '.\3', $selector);
// $element
$sub_selectors = explode(',', $selector);
foreach ($sub_selectors as $key => $sub_selector) {
$parts = explode('$', $sub_selector);
$sub_selector = array_shift($parts);
if (count($parts) && preg_match_all('/((?:[^\/]*\/?\/?)|$)/', $parts[0], $matches)) {
$results = $matches[0];
$results[] = str_repeat('/..', count($results) - 2);
$sub_selector .= implode('', $results);
}
$sub_selectors[$key] = $sub_selector;
}
$selector = implode(',', $sub_selectors);
return $selector;
}