|
1
|
|
|
<?php |
|
2
|
|
|
/* @description Transformation Style Sheets - Revolutionising PHP templating * |
|
3
|
|
|
* @author Tom Butler [email protected] * |
|
4
|
|
|
* @copyright 2015 Tom Butler <[email protected]> | https://r.je/ * |
|
5
|
|
|
* @license http://www.opensource.org/licenses/bsd-license.php BSD License * |
|
6
|
|
|
* @version 1.0 */ |
|
7
|
|
|
namespace Transphporm\Parser; |
|
8
|
|
|
/** Parses a .tss file into individual rules, each rule has a query e,g, `ul li` and a set of rules e.g. `display: none; bind: iteration(id);` */ |
|
9
|
|
|
class Sheet { |
|
10
|
|
|
private $tss; |
|
11
|
|
|
private $rules; |
|
12
|
|
|
private $file; |
|
13
|
|
|
private $baseDir; |
|
14
|
|
|
private $valueParser; |
|
15
|
|
|
private $xPath; |
|
16
|
|
|
private $tokenizer; |
|
17
|
|
|
|
|
18
|
|
|
public function __construct($tss, $templatePrefix, &$baseDir, CssToXpath $xPath, Value $valueParser, \Transphporm\Cache $cache) { |
|
19
|
|
|
$this->cache = $cache; |
|
|
|
|
|
|
20
|
|
|
$this->prefix = $templatePrefix; |
|
|
|
|
|
|
21
|
|
|
$this->baseDir = &$baseDir; |
|
22
|
|
|
if (is_file($tss)) { |
|
23
|
|
|
$this->file = $tss; |
|
24
|
|
|
$this->rules = $this->getRulesFromCache($tss, $templatePrefix); |
|
|
|
|
|
|
25
|
|
|
$baseDir = dirname(realpath($tss)) . DIRECTORY_SEPARATOR; |
|
26
|
|
|
if (empty($this->rules)) $tss = file_get_contents($tss); |
|
27
|
|
|
else return; |
|
28
|
|
|
} |
|
29
|
|
|
$this->tss = $this->stripComments($tss, '//', "\n"); |
|
30
|
|
|
$this->tss = $this->stripComments($this->tss, '/*', '*/'); |
|
31
|
|
|
$this->tokenizer = new Tokenizer($this->tss); |
|
32
|
|
|
$this->tss = $this->tokenizer->getTokens(); |
|
33
|
|
|
$this->xPath = $xPath; |
|
34
|
|
|
$this->valueParser = $valueParser; |
|
35
|
|
|
} |
|
36
|
|
|
|
|
37
|
|
|
private function getRulesFromCache() { |
|
38
|
|
|
//The cache for the key: the filename and template prefix |
|
39
|
|
|
//Each template may have a different prefix which changes the parsed TSS, |
|
40
|
|
|
//Because of this the cache needs to be generated for each template prefix. |
|
41
|
|
|
$key = $this->getCacheKey(); |
|
42
|
|
|
//Try to load the cached rules, if not set in the cache (or expired) parse the supplied sheet |
|
43
|
|
|
$rules = $this->cache->load($key, filemtime($this->file)); |
|
44
|
|
|
return $rules; |
|
45
|
|
|
} |
|
46
|
|
|
|
|
47
|
|
|
private function getCacheKey() { |
|
48
|
|
|
return $this->file . $this->prefix . dirname(realpath($this->file)) . DIRECTORY_SEPARATOR; |
|
49
|
|
|
} |
|
50
|
|
|
|
|
51
|
|
|
public function parse($indexStart = 0) { |
|
52
|
|
|
if (!empty($this->rules)) return $this->rules; |
|
53
|
|
|
$rules = []; |
|
54
|
|
|
$line = 1; |
|
55
|
|
|
foreach (new TokenFilterIterator($this->tss, [Tokenizer::WHITESPACE]) as $token) { |
|
56
|
|
|
if ($processing = $this->processingInstructions($token, count($rules)+$indexStart)) { |
|
57
|
|
|
$this->tss->skip($processing['skip']+1); |
|
58
|
|
|
$rules = array_merge($rules, $processing['rules']); |
|
59
|
|
|
continue; |
|
60
|
|
|
} |
|
61
|
|
|
else if ($token['type'] === Tokenizer::NEW_LINE) { |
|
62
|
|
|
$line++; |
|
63
|
|
|
continue; |
|
64
|
|
|
} |
|
65
|
|
|
$selector = $this->tss->from($token['type'], true)->to(Tokenizer::OPEN_BRACE); |
|
66
|
|
|
$this->tss->skip(count($selector)); |
|
67
|
|
|
if (count($selector) === 0) break; |
|
68
|
|
|
|
|
69
|
|
|
$newRules = $this->cssToRules($selector, count($rules)+$indexStart, $this->getProperties($this->tss->current()['value']), $line); |
|
70
|
|
|
$rules = $this->writeRule($rules, $newRules); |
|
71
|
|
|
} |
|
72
|
|
|
usort($rules, [$this, 'sortRules']); |
|
73
|
|
|
$this->checkError($rules); |
|
74
|
|
|
if (!empty($this->file)) $this->cache->write($this->getCacheKey(), $rules); |
|
75
|
|
|
return $rules; |
|
76
|
|
|
} |
|
77
|
|
|
|
|
78
|
|
|
private function checkError($rules) { |
|
79
|
|
|
if (empty($rules) && count($this->tss) > 0) throw new \Exception('No TSS rules parsed'); |
|
80
|
|
|
} |
|
81
|
|
|
|
|
82
|
|
|
private function CssToRules($selector, $index, $properties, $line) { |
|
83
|
|
|
$parts = $selector->trim()->splitOnToken(Tokenizer::ARG); |
|
84
|
|
|
$rules = []; |
|
85
|
|
|
foreach ($parts as $part) { |
|
86
|
|
|
$part = $part->trim(); |
|
87
|
|
|
$rules[$this->tokenizer->serialize($part)] = new \Transphporm\Rule($this->xPath->getXpath($part), $this->xPath->getPseudo($part), $this->xPath->getDepth($part), $index++, $this->file, $line); |
|
88
|
|
|
$rules[$this->tokenizer->serialize($part)]->properties = $properties; |
|
89
|
|
|
} |
|
90
|
|
|
return $rules; |
|
91
|
|
|
} |
|
92
|
|
|
|
|
93
|
|
|
private function writeRule($rules, $newRules) { |
|
94
|
|
|
foreach ($newRules as $selector => $newRule) { |
|
95
|
|
|
|
|
96
|
|
|
if (isset($rules[$selector])) { |
|
97
|
|
|
$newRule->properties = array_merge($rules[$selector]->properties, $newRule->properties); |
|
98
|
|
|
} |
|
99
|
|
|
$rules[$selector] = $newRule; |
|
100
|
|
|
} |
|
101
|
|
|
|
|
102
|
|
|
return $rules; |
|
103
|
|
|
} |
|
104
|
|
|
|
|
105
|
|
|
private function processingInstructions($token, $indexStart) { |
|
106
|
|
|
if ($token['type'] !== Tokenizer::AT_SIGN) return false; |
|
107
|
|
|
$tokens = $this->tss->from(Tokenizer::AT_SIGN, false)->to(Tokenizer::SEMI_COLON, false); |
|
108
|
|
|
$funcName = $tokens->from(Tokenizer::NAME, true)->read(); |
|
109
|
|
|
$args = $this->valueParser->parseTokens($tokens->from(Tokenizer::NAME)); |
|
110
|
|
|
$rules = $this->$funcName($args, $indexStart); |
|
111
|
|
|
|
|
112
|
|
|
return ['skip' => count($tokens)+1, 'rules' => $rules]; |
|
113
|
|
|
} |
|
114
|
|
|
|
|
115
|
|
|
private function import($args, $indexStart) { |
|
116
|
|
|
if ($this->file !== null) $fileName = dirname(realpath($this->file)) . DIRECTORY_SEPARATOR . $args[0]; |
|
117
|
|
|
else $fileName = $args[0]; |
|
118
|
|
|
$sheet = new Sheet($fileName, $this->prefix, $this->baseDir, $this->xPath, $this->valueParser, $this->cache); |
|
119
|
|
|
return $sheet->parse($indexStart); |
|
120
|
|
|
} |
|
121
|
|
|
|
|
122
|
|
|
private function sortRules($a, $b) { |
|
123
|
|
|
//If they have the same depth, compare on index |
|
124
|
|
|
if ($a->depth === $b->depth) return $a->index < $b->index ? -1 : 1; |
|
125
|
|
|
|
|
126
|
|
|
return ($a->depth < $b->depth) ? -1 : 1; |
|
127
|
|
|
} |
|
128
|
|
|
|
|
129
|
|
|
private function stripComments($str, $open, $close) { |
|
130
|
|
|
$pos = 0; |
|
131
|
|
|
while (($pos = strpos($str, $open, $pos)) !== false) { |
|
132
|
|
|
$end = strpos($str, $close, $pos); |
|
133
|
|
|
if ($end === false) break; |
|
134
|
|
|
$str = substr_replace($str, '', $pos, $end-$pos+strlen($close)); |
|
135
|
|
|
} |
|
136
|
|
|
|
|
137
|
|
|
return $str; |
|
138
|
|
|
} |
|
139
|
|
|
|
|
140
|
|
|
private function getProperties($tokens) { |
|
141
|
|
|
$rules = $tokens->splitOnToken(Tokenizer::SEMI_COLON); |
|
142
|
|
|
|
|
143
|
|
|
$return = []; |
|
144
|
|
|
foreach ($rules as $rule) { |
|
145
|
|
|
$name = $rule->from(Tokenizer::NAME, true)->to(Tokenizer::COLON)->read(); |
|
146
|
|
|
$return[$name] = $rule->from(Tokenizer::COLON)->trim(); |
|
147
|
|
|
} |
|
148
|
|
|
|
|
149
|
|
|
return $return; |
|
150
|
|
|
} |
|
151
|
|
|
} |
|
152
|
|
|
|
Level-2 /
Transphporm
Loading history...
In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: