move strip processing from parser to compiler

libs/sysplugins/smarty_internal_templatecompilerbase.php

@@ -218,6 +218,13 @@ abstract class Smarty_Internal_TemplateCompilerBase
      */
     public $parent_compiler = null;
 
+    /**
+     * Strip preg pattern
+     *
+     * @var string
+     */
+    public $stripRegEx = '![\t ]*[\r\n]+[\t ]*!';
+
     /**
      * method to compile a Smarty template
      *
@@ -595,6 +602,27 @@ abstract class Smarty_Internal_TemplateCompilerBase
         return '$_smarty_tpl->tpl_vars[' . $variable . ']->value';
     }
 
+    /**
+     * This method is called from parser to process a text content section
+     * - remove text from inheritance child templates as they may generate output
+     * - strip text if strip is enabled
+     *
+     * @param string $text
+     *
+     * @return null|\Smarty_Internal_ParseTree_Text
+     */
+    public function processText($text) {
+        if ($this->inheritance_child && !$this->blockTagNestingLevel) {
+            return null;
+        }
+        if ($this->parser->strip) {
+            return new Smarty_Internal_ParseTree_Text($this->parser, preg_replace($this->stripRegEx, '', $text));
+        } else {
+            return new Smarty_Internal_ParseTree_Text($this->parser, $text);
+        }
+
+    }
+
     /**
      * lazy loads internal compile plugin for tag and calls the compile method
      * compile objects cached for reuse.