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<?php
/**
* @private
* @see less-2.5.3.js#Attribute.prototype
*/
class Less_Tree_Attribute extends Less_Tree implements Less_Tree_HasValueProperty {
public $key;
public $op;
public $value;
/**
* @param string $key
* @param null|string $op
* @param null|string|Less_Tree $value
*/
public function __construct( $key, $op, $value ) {
$this->key = $key;
$this->op = $op;
$this->value = $value;
}
public function compile( $env ) {
// Optimization: Avoid object churn for the common case.
// Attributes are very common in CSS/LESS input, but rarely involve dynamic values.
if ( !$this->key instanceof Less_Tree && !$this->value instanceof Less_Tree ) {
return $this;
}
return new self(
$this->key instanceof Less_Tree ? $this->key->compile( $env ) : $this->key,
$this->op,
$this->value instanceof Less_Tree ? $this->value->compile( $env ) : $this->value );
}
public function genCSS( $output ) {
$output->add( $this->toCSS() );
}
public function toCSS() {
$value = $this->key;
if ( $this->op ) {
$value .= $this->op;
$value .= ( is_object( $this->value ) ? $this->value->toCSS() : $this->value );
}
return '[' . $value . ']';
}
}
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