[gnome-builder] three-grid: add support for LTR languages

[Christian Hergert <chergert src gnome org>]

commit db75a05c4349a7b063214b98fce5c2c6665fb769
Author: Christian Hergert <chergert redhat com>
Date:   Mon Oct 10 13:05:38 2016 -0700

    three-grid: add support for LTR languages
    
    We need to flip the left/right columns when under an LTR
    language. We can do our layout calculations without taking
    this into account since they will be matched in size anyway.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=772705

 contrib/egg/egg-three-grid.c |   13 +++++++++++--
 1 files changed, 11 insertions(+), 2 deletions(-)
---
diff --git a/contrib/egg/egg-three-grid.c b/contrib/egg/egg-three-grid.c
index 8d05df4..56f887a 100644
--- a/contrib/egg/egg-three-grid.c
+++ b/contrib/egg/egg-three-grid.c
@@ -433,6 +433,7 @@ egg_three_grid_size_allocate (GtkWidget     *widget,
   g_autofree GtkRequestedSize *rows = NULL;
   const GList *iter;
   GtkAllocation area;
+  GtkTextDirection dir;
   GList *values;
   guint i;
   guint n_rows;
@@ -452,6 +453,8 @@ egg_three_grid_size_allocate (GtkWidget     *widget,
   g_assert (EGG_IS_THREE_GRID (self));
   g_assert (allocation != NULL);
 
+  dir = gtk_widget_get_direction (widget);
+
   gtk_widget_set_allocation (widget, allocation);
 
   egg_three_grid_get_preferred_height_for_width (widget, allocation->width, &min_height, &nat_height);
@@ -540,7 +543,10 @@ egg_three_grid_size_allocate (GtkWidget     *widget,
       child_alloc.width = left;
       child_alloc.y = area.y;
       child_alloc.height = size->minimum_size;
-      egg_three_grid_size_allocate_children (self, EGG_THREE_GRID_COLUMN_LEFT, row_info->row, &child_alloc, 
baseline);
+      if (dir == GTK_TEXT_DIR_LTR)
+        egg_three_grid_size_allocate_children (self, EGG_THREE_GRID_COLUMN_LEFT, row_info->row, 
&child_alloc, baseline);
+      else
+        egg_three_grid_size_allocate_children (self, EGG_THREE_GRID_COLUMN_RIGHT, row_info->row, 
&child_alloc, baseline);
 
       child_alloc.x = area.x + left + priv->column_spacing;
       child_alloc.width = center;
@@ -552,7 +558,10 @@ egg_three_grid_size_allocate (GtkWidget     *widget,
       child_alloc.width = right;
       child_alloc.y = area.y;
       child_alloc.height = size->minimum_size;
-      egg_three_grid_size_allocate_children (self, EGG_THREE_GRID_COLUMN_RIGHT, row_info->row, &child_alloc, 
baseline);
+      if (dir == GTK_TEXT_DIR_LTR)
+        egg_three_grid_size_allocate_children (self, EGG_THREE_GRID_COLUMN_RIGHT, row_info->row, 
&child_alloc, baseline);
+      else
+        egg_three_grid_size_allocate_children (self, EGG_THREE_GRID_COLUMN_LEFT, row_info->row, 
&child_alloc, baseline);
 
       area.y += child_alloc.height + priv->row_spacing;
       area.height -= child_alloc.height + priv->row_spacing;