monitor: watch for removal of non-native mounts on GVolumeMonitor

Fix https://github.com/mate-desktop/caja/issues/1066 "Caja caches folders from usb drives/disk"

Nowadays, we rely on G_FILE_MONITOR_EVENT_UNMOUNTED to be emitted when a
mount disappears, since we already monitor the directory, in order to
switch the view to a different location.
Since non-native mounts very likely won't have file monitoring though,
we're not going to receive such events in that case, and fail to
redirect the view as a consequence.
This patch fixes it by listening to the mount-removed signal on
GVolumeMonitor when a monitor is requested for a non-native mount, and
emulating a file removal in that case.

Backport  Nautilus commit gitlab.gnome.org/GNOME/nautilus/commit/3891241ba760c59d284b7579dbd340651c8d4d29

note that caja_get_mounted_mount_for_root had to be added, while the equivalent Nautilus function was from a prior commit

1 files changed, 1 insertions, 0 deletions

diff --git a/libcaja-private/caja-file-utilities.h b/libcaja-private/caja-file-utilities.h
index 370cec02..2306601f 100644
--- a/libcaja-private/caja-file-utilities.h
+++ b/libcaja-private/caja-file-utilities.h
@@ -47,6 +47,7 @@ gboolean caja_is_desktop_directory               (GFile *dir);
 gboolean caja_is_home_directory                  (GFile *dir);
 gboolean caja_is_home_directory_file             (GFile *dir,
         const char *filename);
+GMount * caja_get_mounted_mount_for_root         (GFile *location);
 gboolean caja_is_in_system_dir                   (GFile *location);
 char *   caja_get_pixmap_directory               (void);