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<?php
/**
* Call
*
* @package Less
* @subpackage tree
*/
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){
$args = array();
foreach($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' ){
$result = Less_Tree_DefaultFunc::compile();
}else{
if( method_exists('Less_Functions',$nameLC) ){ // 1.
try {
$func = new Less_Functions($env, $this->currentFileInfo);
$result = call_user_func_array( array($func,$nameLC),$args);
} catch (Exception $e) {
throw new Less_Exception_Compiler('error evaluating function `' . $this->name . '` '.$e->getMessage().' index: '. $this->index);
}
} elseif( isset( $env->functions[$nameLC] ) && is_callable( $env->functions[$nameLC] ) ) {
try {
$result = call_user_func_array( $env->functions[$nameLC], $args );
} catch (Exception $e) {
throw new Less_Exception_Compiler('error evaluating function `' . $this->name . '` '.$e->getMessage().' index: '. $this->index);
}
}
}
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();
//}
}
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