#105726 by moshe weitzman. Remove necessity to hard-code theme engine...

#105726 by moshe weitzman. Remove necessity to hard-code theme engine directories since they can change.

includes/theme.inc

@@ -214,6 +214,21 @@ function path_to_theme() {
   return dirname($themes[$theme]->filename);
 }
 
+/**
+ * Return the path to the currently selected engine.
+ */
+function path_to_engine() {
+  global $theme, $theme_engine;
+
+  if (!isset($theme)) {
+    init_theme();
+  }
+
+  $engines = list_theme_engines();
+
+  return dirname($engines[$theme_engine]->filename);
+}
+
 /**
  * Retrieve an associative array containing the settings for a theme.
  *

themes/engines/phptemplate/phptemplate.engine

@@ -376,12 +376,12 @@ function _phptemplate_default($hook, $variables, $suggestions = array(), $extens
     }
     else {
       if (in_array($hook, array('node', 'block', 'box', 'comment'))) {
-        $file = "themes/engines/$theme_engine/$hook$extension";
+        $file = path_to_engine() .'/'. $hook . $extension;
       }
       else {
         $variables['hook'] = $hook;
         watchdog('error', t('%engine.engine was instructed to override the %name theme function, but no valid template file was found.', array('%engine' => $theme_engine, '%name' => $hook)));
-        $file = "themes/engines/$theme_engine/default$extension";
+        $file = path_to_engine() .'/default'. $extension;
       }
     }
   }