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
|
<?php
/**
* @private
*/
class Less_Tree_Call extends Less_Tree {
public $value;
public $name;
public $args;
public $index;
public $currentFileInfo;
public $type = 'Call';
public function __construct( $name, $args, $index, $currentFileInfo = null ) {
$this->name = $name;
$this->args = $args;
$this->index = $index;
$this->currentFileInfo = $currentFileInfo;
}
public function accept( $visitor ) {
$this->args = $visitor->visitArray( $this->args );
}
//
// When evaluating a function call,
// we either find the function in `tree.functions` [1],
// in which case we call it, passing the evaluated arguments,
// or we simply print it out as it appeared originally [2].
//
// The *functions.js* file contains the built-in functions.
//
// The reason why we evaluate the arguments, is in the case where
// we try to pass a variable to a function, like: `saturate(@color)`.
// The function should receive the value, not the variable.
//
public function compile( $env = null ) {
$args = [];
foreach ( $this->args as $a ) {
$args[] = $a->compile( $env );
}
$nameLC = strtolower( $this->name );
switch ( $nameLC ) {
case '%':
$nameLC = '_percent';
break;
case 'get-unit':
$nameLC = 'getunit';
break;
case 'data-uri':
$nameLC = 'datauri';
break;
case 'svg-gradient':
$nameLC = 'svggradient';
break;
}
$result = null;
if ( $nameLC === 'default' ) {
$result = Less_Tree_DefaultFunc::compile();
} else {
$func = null;
if ( method_exists( 'Less_Functions', $nameLC ) ) {
$functions = new Less_Functions( $env, $this->currentFileInfo );
$func = [ $functions, $nameLC ];
} elseif ( isset( $env->functions[$nameLC] ) && is_callable( $env->functions[$nameLC] ) ) {
$func = $env->functions[$nameLC];
}
// If the function name isn't known to LESS, output it unchanged as CSS.
if ( $func ) {
try {
$result = call_user_func_array( $func, $args );
} catch ( Exception $e ) {
// Preserve original trace, especially from custom functions.
// https://github.com/wikimedia/less.php/issues/38
throw new Less_Exception_Compiler(
'error evaluating function `' . $this->name . '` ' . $e->getMessage()
. ' index: ' . $this->index,
$e
);
}
}
}
if ( $result !== null ) {
return $result;
}
return new Less_Tree_Call( $this->name, $args, $this->index, $this->currentFileInfo );
}
/**
* @see Less_Tree::genCSS
*/
public function genCSS( $output ) {
$output->add( $this->name . '(', $this->currentFileInfo, $this->index );
$args_len = count( $this->args );
for ( $i = 0; $i < $args_len; $i++ ) {
$this->args[$i]->genCSS( $output );
if ( $i + 1 < $args_len ) {
$output->add( ', ' );
}
}
$output->add( ')' );
}
// public function toCSS(){
// return $this->compile()->toCSS();
//}
}
|
