GVFS AND SHORTCUTS IN THUNAR

The "thunar-master.zip" was downloaded 2020-02-15 23:34:03 UTC from "https://github.com/xfce-mirror/thunar":

STEP 1: How and where the privileges are checked in Thunar source:
cd ./thunar-master && grep -r --include='*.c' -n '.' -e 'harm your system'

Decide whether to show a warning about running as root using "geteuid":
./thunar/thunar-window.c:878:      label = gtk_label_new (_("Warning, you are using the root account, you may harm your system."));


STEP 2: Where the privileges are checked using the "geteuid" function in Thunar source:
grep -r --include='*.c' -n '.' -e 'geteuid'

Determine the effective user ID of the Thunar process and store it in "effective_user_id":
./thunar/thunar-file.c:355:  effective_user_id = geteuid ();

Determine which groups to show in permissions chooser:
./thunar/thunar-permissions-chooser.c:934:  if (G_UNLIKELY (geteuid () == 0))
./thunar/thunar-permissions-chooser.c:947:          user = thunar_user_manager_get_user_by_id (user_manager, geteuid ());

Determine the effective user ID of the Thunar process and store it in "thunar_user_effective_uid":
./thunar/thunar-user.c:222:  thunar_user_effective_uid = geteuid ();

Decide whether to show a warning about running as root using "geteuid":
./thunar/thunar-window.c:868:  if (G_UNLIKELY (geteuid () == 0))


STEP 3: Where the privileges are checked using the "effective_user_id" or "thunar_user_effective_uid" variables in Thunar source:
grep -r --include='*.c' -n '.' -e 'effective_user_id\|thunar_user_effective_uid'

Use "effective_user_id" to allow/deny various file actions:
./thunar/thunar-file.c:130:static guint32            effective_user_id;
./thunar/thunar-file.c:355:  effective_user_id = geteuid ();
./thunar/thunar-file.c:621:  if (G_UNLIKELY (effective_user_id == 0))
./thunar/thunar-file.c:641:          user = thunar_user_manager_get_user_by_id (user_manager, effective_user_id);
./thunar/thunar-file.c:2120:                                                           G_FILE_ATTRIBUTE_UNIX_UID) != effective_user_id))
./thunar/thunar-file.c:3307:      return (effective_user_id == 0 && !thunar_file_is_trashed (file));
./thunar/thunar-file.c:3311:      return ((effective_user_id == 0
./thunar/thunar-file.c:3312:               || effective_user_id == g_file_info_get_attribute_uint32 (file->info,
./thunar/thunar-file.c:3416:  else if (G_UNLIKELY (uid == effective_user_id && !thunar_file_is_writable (file)))

Use "thunar_user_effective_uid" to check if the given user is the owner of the Thunar prosess:
./thunar/thunar-user.c:205:static guint32 thunar_user_effective_uid;
./thunar/thunar-user.c:222:  thunar_user_effective_uid = geteuid ();
./thunar/thunar-user.c:464:  return (user->id == thunar_user_effective_uid);


STEP 4: Where gvfs is used in Thunar source:
grep -r --include='*.c' -n '.' -e 'vfs'

Check if the given gvfs scheme is supported using "g_vfs_get_default" and "g_vfs_get_supported_uri_schemes":
./thunar/thunar-gio-extensions.c:355:thunar_g_vfs_is_uri_scheme_supported (const gchar *scheme)
./thunar/thunar-gio-extensions.c:360:  GVfs                *gvfs;
./thunar/thunar-gio-extensions.c:364:  gvfs = g_vfs_get_default ();
./thunar/thunar-gio-extensions.c:365:  supported_schemes = g_vfs_get_supported_uri_schemes (gvfs);

Decide whether to show the preference "Show action to permanently delete files and folders" in preferences dialog:
./thunar/thunar-preferences-dialog.c:668:  if (thunar_g_vfs_is_uri_scheme_supported ("trash"))

Decide whether to show a warning in preferences dialog that gvfs is not available:
./thunar/thunar-preferences-dialog.c:775:  /* check the most important gvfs-backends, and inform if they are missing */
./thunar/thunar-preferences-dialog.c:776:  if (!thunar_g_vfs_is_uri_scheme_supported ("trash")    ||
./thunar/thunar-preferences-dialog.c:777:      !thunar_g_vfs_is_uri_scheme_supported ("computer") || /* support for removable media */
./thunar/thunar-preferences-dialog.c:778:      !thunar_g_vfs_is_uri_scheme_supported ("sftp") )
./thunar/thunar-preferences-dialog.c:792:      gtk_label_set_markup (GTK_LABEL (label), _("It looks like <a href=\"https://wiki.gnome.org/Projects/gvfs\">gvfs</a> is not available.\n"

Decide a default value for the preference "Show action to permanently delete files and folders":
./thunar/thunar-preferences.c:659:                            !thunar_g_vfs_is_uri_scheme_supported ("trash"),

Decide whether to append trash shortcut to PLACES in shortcuts model:
./thunar/thunar-shortcuts-model.c:1037:  if (thunar_g_vfs_is_uri_scheme_supported ("trash"))

Decide whether to perform "Move to Trash" or "Delete" action when removing selected files in standard view:
./thunar/thunar-standard-view.c:1911:  if (thunar_g_vfs_is_uri_scheme_supported ("trash"))
./thunar/thunar-standard-view.c:4555:  hide_trash_action = writable && (trashed || !trashable || !thunar_g_vfs_is_uri_scheme_supported ("trash"));

Decide whether to append trash and network paths to system paths in tree model:
./thunar/thunar-tree-model.c:328:  if (thunar_g_vfs_is_uri_scheme_supported ("trash"))
./thunar/thunar-tree-model.c:332:  if (thunar_g_vfs_is_uri_scheme_supported ("network"))

Decide whether to perform "Move to Trash" or "Delete" action when removing selected files in tree view:
./thunar/thunar-tree-view.c:1247:  /* check if we should permanently delete the files (user holds shift or no gvfs available) */
./thunar/thunar-tree-view.c:1249:      (gtk_get_current_event_state (&state) && !thunar_g_vfs_is_uri_scheme_supported ("trash")))

Decide whether to show "Move to Trash" or "Delete" action in context menu:
./thunar/thunar-tree-view.c:1479:          if (thunar_g_vfs_is_uri_scheme_supported ("trash"))
./thunar/thunar-tree-view.c:1497:          if (!thunar_g_vfs_is_uri_scheme_supported ("trash")

Decide whether to enable "Open" trash and network actions (Although "Browse Network" with its "Open*" actions is still shown in root Thunar without gvfs - is that wrong?):
./thunar/thunar-window.c:2334:  if (thunar_g_vfs_is_uri_scheme_supported ("trash"))
./thunar/thunar-window.c:2360:  gtk_action_set_visible (action, thunar_g_vfs_is_uri_scheme_supported ("network"));


STEP 5: Where DEVICES shortcuts are handled in Thunar source:
grep -r --include='*.c' -n '.' -e 'DEVICES'

Use the list of hidden devices:
./thunar/thunar-device-monitor.c:50:  PROP_HIDDEN_DEVICES
./thunar/thunar-device-monitor.c:145:                                   PROP_HIDDEN_DEVICES,
./thunar/thunar-device-monitor.c:272:    case PROP_HIDDEN_DEVICES:
./thunar/thunar-device-monitor.c:294:    case PROP_HIDDEN_DEVICES:

The list of hidden devices:
./thunar/thunar-preferences.c:54:  PROP_HIDDEN_DEVICES,
./thunar/thunar-preferences.c:199:  preferences_props[PROP_HIDDEN_DEVICES] =

Determine tooltip for the shortcut:
./thunar/thunar-shortcuts-model.c:609:      if ((shortcut->group & THUNAR_SHORTCUT_GROUP_DEVICES) != 0)

Add the shortcuts group name "DEVICES":
./thunar/thunar-shortcuts-model.c:929:  shortcut->group = THUNAR_SHORTCUT_GROUP_DEVICES_HEADER;
./thunar/thunar-shortcuts-model.c:930:  shortcut->name = g_strdup (_("DEVICES"));

Add the "File System" shortcut:
./thunar/thunar-shortcuts-model.c:935:  shortcut->group = THUNAR_SHORTCUT_GROUP_DEVICES_FILESYSTEM;

Set the specific kind of group for each kind of the device shortcut:
./thunar/thunar-shortcuts-model.c:1554:      shortcut->group = THUNAR_SHORTCUT_GROUP_DEVICES_VOLUMES;
./thunar/thunar-shortcuts-model.c:1558:      shortcut->group = THUNAR_SHORTCUT_GROUP_DEVICES_MOUNTS;

Set the mask for the shortcuts group:
./thunar/thunar-shortcuts-view.c:1019:          if ((group & THUNAR_SHORTCUT_GROUP_DEVICES) != 0)
./thunar/thunar-shortcuts-view.c:1020:            mask = THUNAR_SHORTCUT_GROUP_DEVICES;

Append the appropriate context menu items according to the shortcut's group (i.e. type):
./thunar/thunar-shortcuts-view.c:1142:      case THUNAR_SHORTCUT_GROUP_DEVICES_VOLUMES:
./thunar/thunar-shortcuts-view.c:1209:      case THUNAR_SHORTCUT_GROUP_DEVICES_MOUNTS:


STEP 6: Where devices are loaded and hidden in Thunar source:
(Found using a text editor search only in relevant *.c files manually filtered from the output of: grep -r --include='*.c' -n '.' -e 'hidden'):

Get a list of all devices available using "thunar_device_monitor_get_devices":
./thunar/thunar-shortcuts-model.c:945

Load all volumes and mounts from gio volume monitor in "thunar_device_monitor_init":
./thunar/thunar-device-monitor.c:208+217

Determine the device "hidden" property value using "thunar_device_monitor_id_is_hidden" based on whether the device ID is in "hidden_devices" which is a loaded Thunar "hidden-devices" preference:
./thunar/thunar-device-monitor.c:313

Determine if the device is visible using "thunar_device_monitor_volume_is_visible" based on "can_eject || can_unmount || is_removable || can_mount". The "thunar_device_monitor_volume_is_visible" is used in "thunar_device_monitor_volume_changed". New devices are added to "hidden_volumes" and their visibility is set by manually calling "thunar_device_monitor_volume_changed":
./thunar/thunar-device-monitor.c:356

Hide device according to its "hidden" property in "thunar_device_monitor_set_hidden":
./thunar/thunar-device-monitor.c:791

Get the device "hidden" property value using "thunar_device_get_hidden" (related functions are "thunar_device_get_property" and "thunar_device_set_property"):
./thunar/thunar-device.c:397