window-slot: Add comment for viewed_file_changed_callback logic

Let's document the recently changed behavior of when the current location
is marked as gone to make the code easier to understand.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/nautilus-window-slot.c b/src/nautilus-window-slot.c
index de2d86e18..4b2ca173c 100644
--- a/src/nautilus-window-slot.c
+++ b/src/nautilus-window-slot.c
@@ -1447,6 +1447,13 @@ viewed_file_changed_callback (NautilusFile       *file,
             GMount *mount;
             gboolean find_existing = TRUE;
 
+            /* If the current location disappears, the following code jumps to
+             * the first existing parent except in the case when the file
+             * resides on some of the user interesting mounts and the mount was
+             * unmounted. In that case, it jumps to the home directory to avoid
+             * jumping into the runtime dir.
+             */
+
             location = nautilus_file_get_location (file);
 
             if (g_file_is_native (location))