[gnome-text-editor] page: fix positioning of search bar

[Christian Hergert <chergert src gnome org>]

commit f284e3acb63c83be9e0df8070d45a1730a6128b8
Author: Christian Hergert <christian hergert me>
Date:   Sun Feb 20 13:10:41 2022 -0800

    page: fix positioning of search bar
    
    This fixes the under allocation as well as the placement not going over
    the map when it was supposed to.
    
    Fixes #316

 src/editor-page.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/src/editor-page.c b/src/editor-page.c
index 307a171..b83d210 100644
--- a/src/editor-page.c
+++ b/src/editor-page.c
@@ -503,6 +503,7 @@ get_child_position_cb (GtkOverlay    *overlay,
                        EditorPage    *self)
 {
   GtkRequisition min, nat, map_min;
+  GtkAllocation ov_alloc;
 
   g_assert (GTK_IS_OVERLAY (overlay));
   g_assert (GTK_IS_WIDGET (child));
@@ -513,12 +514,13 @@ get_child_position_cb (GtkOverlay    *overlay,
       !gtk_widget_get_visible (GTK_WIDGET (self->map)))
     return FALSE;
 
+  gtk_widget_get_allocation (GTK_WIDGET (overlay), &ov_alloc);
   gtk_widget_get_preferred_size (child, &min, &nat);
   gtk_widget_get_preferred_size (GTK_WIDGET (self->map), &map_min, NULL);
 
-  if (nat.width + map_min.width <= alloc->width)
+  if (nat.width + map_min.width <= ov_alloc.width)
     {
-      alloc->x += alloc->width;
+      alloc->x = ov_alloc.width;
       alloc->x -= map_min.width;
       alloc->x -= nat.width;
       alloc->width = nat.width;
@@ -528,7 +530,7 @@ get_child_position_cb (GtkOverlay    *overlay,
   else
     {
       alloc->x = 0;
-      alloc->width -= map_min.width;
+      alloc->width = min.width;
       alloc->y = 0;
       alloc->height = min.height;
     }