[gtk/matthiasc/for-master-2] notebook: Update arrows when text direction changes



commit 477675e0293283a7edddc1759726efcb78532c41
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Feb 6 02:07:22 2020 -0500

    notebook: Update arrows when text direction changes
    
    Fixes https://gitlab.gnome.org/GNOME/gtk/issues/103

 gtk/gtknotebook.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)
---
diff --git a/gtk/gtknotebook.c b/gtk/gtknotebook.c
index b3feea7fe3..70fa1a92bc 100644
--- a/gtk/gtknotebook.c
+++ b/gtk/gtknotebook.c
@@ -693,6 +693,8 @@ static void gtk_notebook_grab_notify         (GtkWidget          *widget,
                                               gboolean            was_grabbed);
 static void gtk_notebook_state_flags_changed (GtkWidget          *widget,
                                               GtkStateFlags       previous_state);
+static void gtk_notebook_direction_changed   (GtkWidget        *widget,
+                                              GtkTextDirection  previous_direction);
 static gboolean gtk_notebook_focus           (GtkWidget        *widget,
                                               GtkDirectionType  direction);
 
@@ -958,6 +960,7 @@ gtk_notebook_class_init (GtkNotebookClass *class)
   widget_class->popup_menu = gtk_notebook_popup_menu;
   widget_class->grab_notify = gtk_notebook_grab_notify;
   widget_class->state_flags_changed = gtk_notebook_state_flags_changed;
+  widget_class->direction_changed = gtk_notebook_direction_changed;
   widget_class->focus = gtk_notebook_focus;
   widget_class->compute_expand = gtk_notebook_compute_expand;
 
@@ -3016,11 +3019,16 @@ update_arrow_nodes (GtkNotebook *notebook)
       up_icon_name = "pan-down-symbolic";
       down_icon_name = "pan-up-symbolic";
     }
-  else
+  else if (gtk_widget_get_direction (GTK_WIDGET (notebook)) == GTK_TEXT_DIR_LTR)
     {
       up_icon_name = "pan-end-symbolic";
       down_icon_name = "pan-start-symbolic";
     }
+  else
+    {
+      up_icon_name = "pan-start-symbolic";
+      down_icon_name = "pan-end-symbolic";
+    }
 
   arrow[0] = TRUE;
   arrow[1] = FALSE;
@@ -3105,6 +3113,13 @@ update_arrow_nodes (GtkNotebook *notebook)
     }
 }
 
+static void
+gtk_notebook_direction_changed (GtkWidget        *widget,
+                                GtkTextDirection  previous_direction)
+{
+  update_arrow_nodes (GTK_NOTEBOOK (widget));
+}
+
 static void
 gtk_notebook_dnd_finished_cb (GdkDrag   *drag,
                               GtkWidget *widget)


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