Add plugin hook before the final HTML content of a page is sent

program/include/rcube_html_page.php

@@ -275,10 +275,14 @@ class rcube_html_page
             array($this, 'file_callback'), $output);
         $output = str_replace('$__skin_path', $base_path, $output);
 
+        // trigger hook with final HTML content to be sent
+        $hook = rcmail::get_instance()->plugins->exec_hook("send_page", array('content' => $output));
+        if (!$hook['abort']) {
             if ($this->charset != RCMAIL_CHARSET)
-	        echo rcube_charset_convert($output, RCMAIL_CHARSET, $this->charset);
+                echo rcube_charset_convert($hook['content'], RCMAIL_CHARSET, $this->charset);
             else
-	        echo $output;
+                echo $hook['content'];
+        }
     }
     
     /**