window-slot: hide trashbar if Trash is empty

There is no use for trashbar if the Trash is empty.
So don't show trashbar if Trash is empty.

Also, if user sets the trash empty, withdraw the trashbar if
already present.

https://bugzilla.gnome.org/show_bug.cgi?id=763147

1 files changed, 39 insertions, 1 deletions

diff --git a/src/nautilus-window-slot.c b/src/nautilus-window-slot.c
index ba278e7f3..fe6f3748a 100644
--- a/src/nautilus-window-slot.c
+++ b/src/nautilus-window-slot.c
@@ -29,6 +29,7 @@
 #include "nautilus-mime-actions.h"
 #include "nautilus-special-location-bar.h"
 #include "nautilus-trash-bar.h"
+#include "nautilus-trash-monitor.h"
 #include "nautilus-view.h"
 #include "nautilus-window.h"
 #include "nautilus-x-content-bar.h"
@@ -147,6 +148,10 @@ static void nautilus_window_slot_set_search_visible (NautilusWindowSlot *self,
 static gboolean nautilus_window_slot_get_search_visible (NautilusWindowSlot *self);
 static void nautilus_window_slot_set_location (NautilusWindowSlot *self,
                                                GFile              *location);
+static void trash_state_changed_cb (NautilusTrashMonitor *monitor,
+                                    gboolean              is_empty,
+                                    gpointer              user_data);
+
 gboolean
 nautilus_window_slot_handles_location (NautilusWindowSlot *self,
                                        GFile              *location)
@@ -886,6 +891,10 @@ nautilus_window_slot_init (NautilusWindowSlot *self)
     priv = nautilus_window_slot_get_instance_private (self);
     app = g_application_get_default ();
 
+    g_signal_connect (nautilus_trash_monitor_get (),
+                      "trash-state-changed",
+                      G_CALLBACK (trash_state_changed_cb), self);
+
     priv->slot_action_group = G_ACTION_GROUP (g_simple_action_group_new ());
     g_action_map_add_action_entries (G_ACTION_MAP (priv->slot_action_group),
                                      slot_entries,
@@ -2309,6 +2318,30 @@ out:
 }
 
 static void
+trash_state_changed_cb (NautilusTrashMonitor *monitor,
+                        gboolean              is_empty,
+                        gpointer              user_data)
+{
+    GFile *location;
+    NautilusDirectory *directory;
+
+    location = nautilus_window_slot_get_current_location (user_data);
+
+    if (location == NULL)
+    {
+        return;
+    }
+
+    directory = nautilus_directory_get (location);
+
+    if (nautilus_directory_is_in_trash (directory) &&
+        nautilus_trash_monitor_is_empty ())
+    {
+        nautilus_window_slot_remove_extra_location_widgets (user_data);
+    }
+}
+
+static void
 nautilus_window_slot_show_trash_bar (NautilusWindowSlot *self)
 {
     GtkWidget *bar;
@@ -2481,7 +2514,10 @@ nautilus_window_slot_setup_extra_location_widgets (NautilusWindowSlot *self)
 
     if (nautilus_directory_is_in_trash (directory))
     {
-        nautilus_window_slot_show_trash_bar (self);
+        if (!nautilus_trash_monitor_is_empty ())
+        {
+            nautilus_window_slot_show_trash_bar (self);
+        }
     }
     else
     {
@@ -2649,6 +2685,8 @@ nautilus_window_slot_dispose (GObject *object)
 
     nautilus_window_slot_remove_extra_location_widgets (self);
 
+    g_signal_handlers_disconnect_by_data (nautilus_trash_monitor_get (), self);
+
     if (priv->content_view)
     {
         widget = GTK_WIDGET (priv->content_view);