Adding Handlebars_String to fix #12

If a helper return a Handlebars_String, then the result is compiled again.

src/Handlebars/Engine.php

@@ -418,6 +418,20 @@ class Handlebars_Engine
         return new Handlebars_Template($this, $tree, $source);
     }
 
+
+    /**
+     * Load string into a template object
+     *
+     * @param string $source string to load
+     *
+     * @return Handlebars_Template
+     */
+    public function loadString($source)
+    {
+        $tree = $this->_tokenize($source);
+        return new Handlebars_Template($this, $tree, $source);
+    }
+
     /**
      * try to tokenize source, or get them from cache if available
      *

src/Handlebars/Loader.php

@@ -34,7 +34,7 @@ interface Handlebars_Loader
      *
      * @param string $name template name to load
      *
-     * @return string Mustache Template source
+     * @return Handlebars_String
      */
     public function load($name);
 }

src/Handlebars/Loader/FilesystemLoader.php

@@ -84,15 +84,14 @@ class Handlebars_Loader_FilesystemLoader implements Handlebars_Loader
      *
      * @param string $name template name
      *
-     * @return string Handlebars Template source
+     * @return Handlebars_String Handlebars Template source
      */
     public function load($name)
     {
         if (!isset($this->_templates[$name])) {
             $this->_templates[$name] = $this->loadFile($name);
         }
-
+        return new Handlebars_String($this->_templates[$name]);
-        return $this->_templates[$name];
     }
 
     /**

src/Handlebars/Loader/StringLoader.php

@@ -34,10 +34,10 @@ class Handlebars_Loader_StringLoader implements Handlebars_Loader
      *
      * @param string $name Handlebars Template source
      *
-     * @return string Handlebars Template source
+     * @return Handlebars_string Handlebars Template source
      */
     public function load($name)
     {
-        return $name;
+        return new Handlebars_String($name);
     }
 }

src/Handlebars/String.php

@@ -0,0 +1,74 @@
+<?php
+/**
+ * This file is part of Handlebars-php
+ *
+ * PHP version 5.3
+ *
+ * @category  Xamin
+ * @package   Handlebars
+ * @author    fzerorubigd <fzerorubigd@gmail.com>
+ * @copyright 2013 Authors
+ * @license   GPLv3 <http://www.gnu.org/licenses/gpl-3.0.html>
+ * @version   GIT: $Id$
+ * @link      http://xamin.ir
+ */
+
+
+/**
+ * Handlebars string
+ *
+ * @category  Xamin
+ * @package   Handlebars
+ * @author    fzerorubigd <fzerorubigd@gmail.com>
+ * @copyright 2013 Authors
+ * @license   GPLv3 <http://www.gnu.org/licenses/gpl-3.0.html>
+ * @version   Release: @package_version@
+ * @link      http://xamin.ir
+ */
+
+class Handlebars_String
+{
+    private $_string;
+
+    /**
+     * Create new string
+     *
+     * @param string $string input source
+     */
+    public function __construct($string)
+    {
+        $this->_string = $string;
+    }
+
+    /**
+     * To String
+     *
+     * @return string
+     */
+    public function __toString()
+    {
+        return $this->getString();
+    }
+
+    /**
+     * Get string
+     *
+     * @return string
+     */
+    public function getString()
+    {
+        return $this->_string;
+    }
+
+    /**
+     * Create new string
+     *
+     * @param string $string input source
+     *
+     * @return void
+     */
+    public function setString($string)
+    {
+        $this->_string = $string;
+    }
+}

src/Handlebars/Template.php

@@ -249,7 +249,12 @@ class Handlebars_Template
                 $current[Handlebars_Tokenizer::ARGS],  //Arguments
                 $source
                 );
-            return call_user_func_array($helpers->$sectionName, $params);
+            $return = call_user_func_array($helpers->$sectionName, $params);
+            if ($return instanceof Handlebars_String) {
+                return $this->handlebars->loadString($return)->render($context);
+            } else {
+                return $return;
+            }
         } elseif (trim($current[Handlebars_Tokenizer::ARGS]) == '') {
             //Fallback for mustache style each/with/for just if there is no argument at all.
             try {

src/Handlebars/Tokenizer.php

@@ -106,6 +106,9 @@ class Handlebars_Tokenizer
      */
     public function scan($text, $delimiters = null)
     {
+        if ($text instanceof Handlebars_String) {
+            $text = $text->getString();
+        }
         $this->reset();
 
         if ($delimiters = trim($delimiters)) {