1 files changed, 121 insertions, 0 deletions
diff --git a/lib/less.php/Tree/Call.php b/lib/less.php/Tree/Call.php
new file mode 100644
index 0000000..3c3382d
--- /dev/null
+++ b/lib/less.php/Tree/Call.php
@@ -0,0 +1,121 @@
+<?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();
+    //}
+
+}