Update MPDFResponseFormatter.php

Author: klevron

MPDFResponseFormatter.php

@@ -76,6 +76,11 @@ class MPDFResponseFormatter extends Component implements ResponseFormatterInterf
     public $outputName = '';
     public $outputDest = 'I';
 
+    /**
+     * @var \Closure
+     */
+    public $beforeWrite;
+
     /**
      * @inheritdoc
      */
@@ -123,10 +128,14 @@ protected function formatMPDF($response)
         $this->setMPDFFooter($mpdf, $this->footer);
 
         if (is_string($response->data)) {
+            if ($this->beforeWrite !== null)
+                call_user_func($this->beforeWrite, $mpdf);
             $mpdf->WriteHTML($response->data, 2);
         } else if (is_array($response->data)) {
             $this->setOptions($mpdf, $response->data['options']);
             $this->setMPDFOptions($mpdf, $response->data['mPDFOptions']);
+            if ($this->beforeWrite !== null)
+                call_user_func($this->beforeWrite, $mpdf);
             if (isset($response->data['content']))
                 $mpdf->WriteHTML($response->data['content'], 2);
         }
@@ -141,7 +150,7 @@ protected function setOptions($mpdf, $options)
     {
         if (!is_array($options))
             return;
-
+        
         foreach ($options as $attribute => $value) {
             $this->$attribute = $value;