[gtk+/portal: 6/14] portal: Allow forcing it off

[Matthias Clasen <matthiasc src gnome org>]

commit 9bd5dcddd4c22521fa15d61b8414eab349c7f167
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Jun 11 10:23:27 2016 -0400

    portal: Allow forcing it off
    
    With GTK_USE_PORTAL=1, try to use the portal even if we if we use
    unsupported features. With GTK_USE_PORTAL=0, never use the portal,
    as before. What we really want here is to detect the situation
    of "sandboxed without full $HOME access" and use the portal in
    those cases. If we make the portal smart enough to hand back
    direct uris for files that the app can access, we may simplify
    the check to just "sandboxed".

 gtk/gtkfilechoosernativeportal.c |   20 ++++++++++++++------
 1 files changed, 14 insertions(+), 6 deletions(-)
---
diff --git a/gtk/gtkfilechoosernativeportal.c b/gtk/gtkfilechoosernativeportal.c
index 322c5e9..cd875d3 100644
--- a/gtk/gtkfilechoosernativeportal.c
+++ b/gtk/gtkfilechoosernativeportal.c
@@ -277,16 +277,24 @@ gtk_file_chooser_native_portal_show (GtkFileChooserNative *self)
   const char *method_name;
   const char *signal_name;
   GDBusSignalCallback signal_callback;
+  const char *use_portal;
 
-  if (g_getenv ("GTK_USE_PORTAL") == NULL)
-    return FALSE;
+  use_portal = g_getenv ("GTK_USE_PORTAL");
+  if (!use_portal)
+    use_portal = "";
 
-  if (gtk_file_chooser_get_extra_widget (GTK_FILE_CHOOSER (self)) != NULL)
+  if (g_str_equal (use_portal, "0"))
     return FALSE;
 
-  update_preview_signal = g_signal_lookup ("update-preview", GTK_TYPE_FILE_CHOOSER);
-  if (g_signal_has_handler_pending (self, update_preview_signal, 0, TRUE))
-    return FALSE;
+  if (!g_str_equal (use_portal, "1"))
+    {
+      if (gtk_file_chooser_get_extra_widget (GTK_FILE_CHOOSER (self)) != NULL)
+        return FALSE;
+
+      update_preview_signal = g_signal_lookup ("update-preview", GTK_TYPE_FILE_CHOOSER);
+      if (g_signal_has_handler_pending (self, update_preview_signal, 0, TRUE))
+        return FALSE;
+    }
 
   connection = g_bus_get_sync (G_BUS_TYPE_SESSION, NULL, NULL);
   if (connection == NULL)