[nautilus/antonioffix-menus-and-popovers: 16/20] files-view: Always pop up background menu in view

[António Fernandes <antoniof src gnome org>]

commit 16cad7516b0d60a9cd24ac214085b1152e75af88
Author: António Fernandes <antoniof gnome org>
Date:   Tue Jan 9 22:40:51 2018 +0000

    files-view: Always pop up background menu in view
    
    Background context menu pops up from the pointer's position, which
    is good when using a poiting device to open it.
    
    When using keyboard shortcuts to open the background context menu,
    the pointer may be outside the view, so the background context menu
    will pop up out of context.
    
    Instead, when triggered from the keyboard, pop up from the center
    of the view.

 src/nautilus-files-view.c | 27 +++++++++++++++++++++++----
 1 file changed, 23 insertions(+), 4 deletions(-)
---
diff --git a/src/nautilus-files-view.c b/src/nautilus-files-view.c
index db930064d..97ef75fed 100644
--- a/src/nautilus-files-view.c
+++ b/src/nautilus-files-view.c
@@ -8137,7 +8137,7 @@ nautilus_files_view_pop_up_selection_context_menu  (NautilusFilesView *view,
 /**
  * nautilus_files_view_pop_up_background_context_menu
  *
- * Pop up a context menu appropriate to the view globally at the last right click location.
+ * Pop up a context menu appropriate to the location in view.
  * @view: NautilusFilesView of interest.
  *
  **/
@@ -8156,9 +8156,28 @@ nautilus_files_view_pop_up_background_context_menu (NautilusFilesView *view,
      */
     update_context_menus_if_pending (view);
 
-    nautilus_pop_up_context_menu_at_pointer (GTK_WIDGET (view),
-                                             priv->background_menu,
-                                             event);
+    if (event != NULL)
+    {
+        nautilus_pop_up_context_menu_at_pointer (GTK_WIDGET (view),
+                                                 priv->background_menu,
+                                                 event);
+    }
+    else
+    {
+        /* It was triggered from the keyboard, so pop up from the center of view.
+         */
+        g_autoptr (GtkWidget) gtk_menu = NULL;
+
+        gtk_menu = gtk_menu_new_from_model (G_MENU_MODEL (priv->background_menu));
+        gtk_menu_attach_to_widget (GTK_MENU (gtk_menu), GTK_WIDGET (view), NULL);
+
+        gtk_menu_popup_at_widget (GTK_MENU (gtk_menu),
+                                  GTK_WIDGET (view),
+                                  GDK_GRAVITY_CENTER,
+                                  GDK_GRAVITY_CENTER,
+                                  NULL);
+        g_object_ref_sink (gtk_menu);
+    }
 }
 
 static gboolean