file-undo-operations: Set NULL dest for duplication

In src/nautilus-file-operations.c, the duplication operation is
identified within the 'copy' code paths by having a NULL destination
imply it's the same as the source parent dir.

For consistency, adopt the same paradigm in the undo stack.

Also, while we are at it, adopt autocleanup for some related strings.

2 files changed, 22 insertions, 10 deletions

diff --git a/src/nautilus-file-operations.c b/src/nautilus-file-operations.c
index 6b0afd70e..0a081e67e 100644
--- a/src/nautilus-file-operations.c
+++ b/src/nautilus-file-operations.c
@@ -7113,7 +7113,7 @@ nautilus_file_operations_duplicate (GList                          *files,
         job->common.undo_info =
             nautilus_file_undo_info_ext_new (NAUTILUS_FILE_UNDO_OP_DUPLICATE,
                                              g_list_length (files),
-                                             src_dir, src_dir);
+                                             src_dir, NULL);
     }
 
     task = g_task_new (NULL, job->common.cancellable, copy_task_done, job);
diff --git a/src/nautilus-file-undo-operations.c b/src/nautilus-file-undo-operations.c
index 64f9ce76c..70123dace 100644
--- a/src/nautilus-file-undo-operations.c
+++ b/src/nautilus-file-undo-operations.c
@@ -435,10 +435,20 @@ ext_strings_func (NautilusFileUndoInfo  *info,
     NautilusFileUndoInfoExt *self = NAUTILUS_FILE_UNDO_INFO_EXT (info);
     NautilusFileUndoOp op_type = nautilus_file_undo_info_get_op_type (info);
     gint count = nautilus_file_undo_info_get_item_count (info);
-    gchar *name = NULL, *source, *destination;
+    g_autofree gchar *name = NULL;
+    g_autofree gchar *source = NULL;
+    g_autofree gchar *destination = NULL;
 
     source = g_file_get_path (self->src_dir);
-    destination = g_file_get_path (self->dest_dir);
+
+    if (self->dest_dir == NULL)
+    {
+        g_assert (op_type == NAUTILUS_FILE_UNDO_OP_DUPLICATE);
+    }
+    else
+    {
+        destination = g_file_get_path (self->dest_dir);
+    }
 
     if (count <= 1)
     {
@@ -528,7 +538,7 @@ ext_strings_func (NautilusFileUndoInfo  *info,
                                                  count);
             *redo_description = g_strdup_printf (ngettext ("Duplicate %d item in “%s”",
                                                            "Duplicate %d items in “%s”", count),
-                                                 count, destination);
+                                                 count, source);
 
             *undo_label = g_strdup_printf (ngettext ("_Undo Duplicate %d item",
                                                      "_Undo Duplicate %d items", count),
@@ -541,7 +551,7 @@ ext_strings_func (NautilusFileUndoInfo  *info,
         {
             *undo_description = g_strdup_printf (_("Delete “%s”"), name);
             *redo_description = g_strdup_printf (_("Duplicate “%s” in “%s”"),
-                                                 name, destination);
+                                                 name, source);
 
             *undo_label = g_strdup (_("_Undo Duplicate"));
             *redo_label = g_strdup (_("_Redo Duplicate"));
@@ -571,10 +581,6 @@ ext_strings_func (NautilusFileUndoInfo  *info,
     {
         g_assert_not_reached ();
     }
-
-    g_free (name);
-    g_free (source);
-    g_free (destination);
 }
 
 static void
@@ -777,13 +783,19 @@ nautilus_file_undo_info_ext_new (NautilusFileUndoOp  op_type,
 {
     NautilusFileUndoInfoExt *self;
 
+    g_assert (src_dir != NULL);
+    g_assert (target_dir != NULL || op_type == NAUTILUS_FILE_UNDO_OP_DUPLICATE);
+
     self = g_object_new (NAUTILUS_TYPE_FILE_UNDO_INFO_EXT,
                          "op-type", op_type,
                          "item-count", item_count,
                          NULL);
 
     self->src_dir = g_object_ref (src_dir);
-    self->dest_dir = g_object_ref (target_dir);
+    if (target_dir != NULL)
+    {
+        self->dest_dir = g_object_ref (target_dir);
+    }
     self->sources = g_queue_new ();
     self->destinations = g_queue_new ();