[gthumb] headerbar: set the button arrow icons according to the locale's text direction

[Paolo Bacchilega <paobac src gnome org>]

commit 8d000a0b737bec1893c27bee680d4eff0905d78f
Author: Yosef Or Boczko <yoseforb gmail com>
Date:   Sat Nov 9 22:32:26 2013 +0200

    headerbar: set the button arrow icons according to the locale's text direction
    
    https://bugzilla.gnome.org/show_bug.cgi?id=711741

 gthumb/gth-browser.c |    9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)
---
diff --git a/gthumb/gth-browser.c b/gthumb/gth-browser.c
index d10ac54..24b8ab1 100644
--- a/gthumb/gth-browser.c
+++ b/gthumb/gth-browser.c
@@ -4018,9 +4018,12 @@ gth_browser_init (GthBrowser *browser)
 
        {
                GtkWidget *header_bar;
+               gboolean   rtl;
 
                header_bar = gth_window_get_header_bar (GTH_WINDOW (browser));
 
+               rtl = gtk_widget_get_direction (header_bar) == GTK_TEXT_DIR_RTL;
+
                gtk_widget_set_margin_left 
(browser->priv->header_sections[GTH_BROWSER_HEADER_SECTION_BROWSER_COMMANDS], SECTION_BIG_MARGIN);
                gtk_widget_set_margin_right 
(browser->priv->header_sections[GTH_BROWSER_HEADER_SECTION_BROWSER_VIEW], SECTION_BIG_MARGIN);
                gtk_widget_set_margin_left 
(browser->priv->header_sections[GTH_BROWSER_HEADER_SECTION_VIEWER_EDIT], SECTION_BIG_MARGIN);
@@ -4068,13 +4071,13 @@ gth_browser_init (GthBrowser *browser)
 
                gth_browser_add_header_bar_button (browser,
                                                   GTH_BROWSER_HEADER_SECTION_BROWSER_NAVIGATION,
-                                                  "go-previous-symbolic",
+                                                  rtl ? "go-previous-rtl-symbolic" :  "go-previous-symbolic",
                                                   _("Go to the previous visited location"),
                                                   "win.go-back",
                                                   NULL);
                gth_browser_add_header_bar_button (browser,
                                                   GTH_BROWSER_HEADER_SECTION_BROWSER_NAVIGATION,
-                                                  "go-next-symbolic",
+                                                  rtl ? "go-next-rtl-symbolic" : "go-next-symbolic",
                                                   _("Go to the next visited location"),
                                                   "win.go-forward",
                                                   NULL);
@@ -4102,7 +4105,7 @@ gth_browser_init (GthBrowser *browser)
 
                gth_browser_add_header_bar_button (browser,
                                                   GTH_BROWSER_HEADER_SECTION_VIEWER_NAVIGATION,
-                                                  "go-previous-symbolic",
+                                                  rtl ? "go-previous-rtl-symbolic" :  "go-previous-symbolic",
                                                   _("View the folders"),
                                                   "win.browser-mode",
                                                   NULL);