[gnome-shell] overviewControls: split out an util function

[Cosimo Cecchi <cosimoc src gnome org>]

commit 7ed4bd67b87f0876ab6a16c83f11ef2f41f05ea6
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Fri Feb 15 20:43:01 2013 -0500

    overviewControls: split out an util function
    
    Will be used later
    
    https://bugzilla.gnome.org/show_bug.cgi?id=693924

 js/ui/overviewControls.js |   22 ++++++++++------------
 1 files changed, 10 insertions(+), 12 deletions(-)
---
diff --git a/js/ui/overviewControls.js b/js/ui/overviewControls.js
index dce5ca1..cde6bde 100644
--- a/js/ui/overviewControls.js
+++ b/js/ui/overviewControls.js
@@ -10,6 +10,15 @@ const ViewSelector = imports.ui.viewSelector;
 
 const SIDE_CONTROLS_ANIMATION_TIME = 0.2;
 
+function getRtlSlideDirection(direction, actor) {
+    let rtl = (actor.text_direction == Clutter.TextDirection.RTL);
+    if (rtl)
+        direction = (direction == SlideDirection.LEFT) ?
+            SlideDirection.RIGHT : SlideDirection.LEFT;
+
+    return direction;
+};
+
 const SlideDirection = {
     LEFT: 0,
     RIGHT: 1
@@ -26,17 +35,6 @@ const SlideLayout = new Lang.Class({
         this.parent(params);
     },
 
-    _getRealSlideDirection: function(child) {
-        let direction = this._direction;
-
-        let rtl = (child.text_direction == Clutter.TextDirection.RTL);
-        if (rtl)
-            direction = (direction == SlideDirection.LEFT) ?
-                SlideDirection.RIGHT : SlideDirection.LEFT;
-
-        return direction;
-    },
-
     vfunc_get_preferred_width: function(container, forHeight) {
         let child = container.get_first_child();
 
@@ -55,7 +53,7 @@ const SlideLayout = new Lang.Class({
         let availWidth = Math.round(box.x2 - box.x1);
         let availHeight = Math.round(box.y2 - box.y1);
 
-        let realDirection = this._getRealSlideDirection(child);
+        let realDirection = getRtlSlideDirection(this._direction, child);
         let translationX = (realDirection == SlideDirection.LEFT) ?
             (availWidth - natWidth) : (natWidth - availWidth);