Add callback functions/filters

ETwigViewRenderer.php

@@ -1,4 +1,4 @@
-<?php
+<?php
 /**
  * Twig view renderer
  *
@@ -96,6 +96,9 @@ function init()
 
         // Adding Yii::app() object to globals
         $this->_twig->addGlobal('App', $app);
+
+        //Adding PHP-global functions
+        $this->_twig->addGlobal('php', new ETwigViewRendererPhpGlobal());
 
         // Adding Yii's core static classes proxy as 'C' shortcut (usage: {{C.Html.tag(...)}})
         $this->_twig->addGlobal('C', new ETwigViewRendererYiiCoreStaticClassesProxy());
@@ -223,6 +226,7 @@ public function getTwig()
     private function _addCustom($classType, $elements)
     {
         $classFunction = 'Twig_'.$classType.'_Function';
+        $simpleClass = 'Twig_Simple'.$classType;
 
         foreach ($elements as $name => $func) {
             $twigElement = null;
@@ -236,10 +240,15 @@ private function _addCustom($classType, $elements)
                 case is_array($func) && is_string($func[0]) && isset($func[1]) && is_array($func[1]):
                     $twigElement = new $classFunction($func[0], $func[1]);
                 break;
+                // Callback given
+                case is_callable($func):
+                    $twigElement = new $simpleClass($name, $func);
+                break;
             }
 
             if ($twigElement !== null) {
-                $this->_twig->{'add'.$classType}($name, $twigElement);
+                if($twigElement instanceof Twig_SimpleFunction || $twigElement instanceof Twig_SimpleFilter) $this->_twig->{'add'.$classType}($twigElement);
+                else $this->_twig->{'add'.$classType}($name, $twigElement);
             } else {
                 throw new CException(Yii::t('yiiext',
                                              'Incorrect options for "{classType}" [{name}]',
@@ -320,4 +329,18 @@ function __get($className)
 function ETwigViewRendererVoidFunction($argument)
 {
     return '';
+}
+
+/**
+ * Class-wrapper of PHP-global functions
+ * 
+ * @author Dmitry Morgachev <[email protected]>
+ * @version 1.0.0
+ */
+class ETwigViewRendererPhpGlobal
+{
+    function __call($func, $args=array())
+    {
+        return call_user_func_array($func, $args);
+    }
 }

README.md

@@ -1,4 +1,4 @@
-Twig view renderer
+Twig view renderer
 ==================
 
 This extension allows you to use [Twig](http://twig.sensiolabs.org) templates in Yii.
@@ -69,4 +69,28 @@ This extension allows you to use [Twig](http://twig.sensiolabs.org) templates in
         ]
     }, true) }}
 </div><!-- mainmenu -->
+```
+
+###Callbacks usage example
+```php
+'viewRenderer' => array(
+    'class' => 'ext.ETwigViewRenderer',
+    'filters' => array(
+        't' => function($message, $options = array(), $category = 'app'){
+            return Yii::t($category, $message, $options); //change places of arguments
+        }
+    ),
+    'functions' => array(
+        'route' => function($route) { 
+            return Yii::app()->urlManager->createUrl($route); //use non-static methods
+        }
+    )
+),
+```
+
+Than you can do that:
+
+```html
+<h1>{{ 'Hello, world!'|t }}</h1>
+<a href="{{ route('site/index') }}">{{ 'Home'|t }}</a>
 ```