MDL-39871 themes: can now specify regions to swap when using rtl langs

Conflicts:
	lib/pagelib.php

lib/outputlib.php

@@ -325,6 +325,14 @@ class theme_config {
      */
     public $yuicssmodules = array('cssreset', 'cssfonts', 'cssgrids', 'cssbase');
 
+    /**
+     * An associative array of block manipulations that should be made if the user is using an rtl language.
+     * The key is the original block region, and the value is the block region to change to.
+     * This is used when displaying blocks for regions only.
+     * @var array
+     */
+    public $blockrtlmanipulations = array();
+
     /**
      * @var renderer_factory Instance of the renderer_factory implementation
      * we are using. Implementation detail.
@@ -418,7 +426,7 @@ class theme_config {
         $configurable = array('parents', 'sheets', 'parents_exclude_sheets', 'plugins_exclude_sheets', 'javascripts', 'javascripts_footer',
                               'parents_exclude_javascripts', 'layouts', 'enable_dock', 'enablecourseajax', 'supportscssoptimisation',
                               'rendererfactory', 'csspostprocess', 'editor_sheets', 'rarrow', 'larrow', 'hidefromselector', 'doctype',
-                              'yuicssmodules');
+                              'yuicssmodules', 'blockrtlmanipulations');
 
         foreach ($config as $key=>$value) {
             if (in_array($key, $configurable)) {