/* GIO - GLib Input, Output and Streaming Library

 * 

 * Copyright (C) 2006-2007 Red Hat, Inc.

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General

 * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.

 *

 * Author: Alexander Larsson <alexl@redhat.com>

 *         David Zeuthen <davidz@redhat.com>

 */

#include "config.h"

#include "gmount.h"

#include "gvolume.h"

#include "gthemedicon.h"

#include "gasyncresult.h"

#include "gtask.h"

#include "gioerror.h"

#include "glibintl.h"

/**

 * SECTION:gvolume

 * @short_description: Volume management

 * @include: gio/gio.h

 * 

 * The #GVolume interface represents user-visible objects that can be

 * mounted. Note, when porting from GnomeVFS, #GVolume is the moral

 * equivalent of #GnomeVFSDrive.

 *

 * Mounting a #GVolume instance is an asynchronous operation. For more

 * information about asynchronous operations, see #GAsyncResult and

 * #GTask. To mount a #GVolume, first call g_volume_mount() with (at

 * least) the #GVolume instance, optionally a #GMountOperation object

 * and a #GAsyncReadyCallback.

 *

 * Typically, one will only want to pass %NULL for the

 * #GMountOperation if automounting all volumes when a desktop session

 * starts since it's not desirable to put up a lot of dialogs asking

 * for credentials.

 *

 * The callback will be fired when the operation has resolved (either

 * with success or failure), and a #GAsyncResult instance will be

 * passed to the callback.  That callback should then call

 * g_volume_mount_finish() with the #GVolume instance and the

 * #GAsyncResult data to see if the operation was completed

 * successfully.  If an @error is present when g_volume_mount_finish()

 * is called, then it will be filled with any error information.

 *

 * ## Volume Identifiers # {#volume-identifier}

 *

 * It is sometimes necessary to directly access the underlying

 * operating system object behind a volume (e.g. for passing a volume

 * to an application via the commandline). For this purpose, GIO

 * allows to obtain an 'identifier' for the volume. There can be

 * different kinds of identifiers, such as Hal UDIs, filesystem labels,

 * traditional Unix devices (e.g. `/dev/sda2`), UUIDs. GIO uses predefined

 * strings as names for the different kinds of identifiers:

 * #G_VOLUME_IDENTIFIER_KIND_UUID, #G_VOLUME_IDENTIFIER_KIND_LABEL, etc.

 * Use g_volume_get_identifier() to obtain an identifier for a volume.

 *

 *

 * Note that #G_VOLUME_IDENTIFIER_KIND_HAL_UDI will only be available

 * when the gvfs hal volume monitor is in use. Other volume monitors

 * will generally be able to provide the #G_VOLUME_IDENTIFIER_KIND_UNIX_DEVICE

 * identifier, which can be used to obtain a hal device by means of

 * libhal_manager_find_device_string_match().

 */

typedef GVolumeIface GVolumeInterface;

G_DEFINE_INTERFACE(GVolume, g_volume, G_TYPE_OBJECT)

static void

g_volume_default_init (GVolumeInterface *iface)

{

  /**

   * GVolume::changed:

   * 

   * Emitted when the volume has been changed.

   */

  g_signal_new (I_("changed"),

    G_TYPE_VOLUME,

    G_SIGNAL_RUN_LAST,

    G_STRUCT_OFFSET (GVolumeIface, changed),

    NULL, NULL,

    NULL,

    G_TYPE_NONE, 0);

  /**

   * GVolume::removed:

   * 

   * This signal is emitted when the #GVolume have been removed. If

   * the recipient is holding references to the object they should

   * release them so the object can be finalized.

   */

  g_signal_new (I_("removed"),

    G_TYPE_VOLUME,

    G_SIGNAL_RUN_LAST,

    G_STRUCT_OFFSET (GVolumeIface, removed),

    NULL, NULL,

    NULL,

    G_TYPE_NONE, 0);

}

/**

 * g_volume_get_name:

 * @volume: a #GVolume

 * 

 * Gets the name of @volume.

 * 

 * Returns: the name for the given @volume. The returned string should 

 *     be freed with g_free() when no longer needed.

 */

char *

g_volume_get_name (GVolume *volume)

{

  GVolumeIface *iface;

  g_return_val_if_fail (G_IS_VOLUME (volume), NULL);

  iface = G_VOLUME_GET_IFACE (volume);

  return (* iface->get_name) (volume);

}

/**

 * g_volume_get_icon:

 * @volume: a #GVolume

 * 

 * Gets the icon for @volume.

 * 

 * Returns: (transfer full): a #GIcon.

 *     The returned object should be unreffed with g_object_unref()

 *     when no longer needed.

 */

GIcon *

g_volume_get_icon (GVolume *volume)

{

  GVolumeIface *iface;

  g_return_val_if_fail (G_IS_VOLUME (volume), NULL);

  iface = G_VOLUME_GET_IFACE (volume);

  return (* iface->get_icon) (volume);

}

/**

 * g_volume_get_symbolic_icon:

 * @volume: a #GVolume

 * 

 * Gets the symbolic icon for @volume.

 * 

 * Returns: (transfer full): a #GIcon.

 *     The returned object should be unreffed with g_object_unref()

 *     when no longer needed.

 *

 * Since: 2.34

 */

GIcon *

g_volume_get_symbolic_icon (GVolume *volume)

{

  GVolumeIface *iface;

  GIcon *ret;

  g_return_val_if_fail (G_IS_VOLUME (volume), NULL);

  iface = G_VOLUME_GET_IFACE (volume);

  if (iface->get_symbolic_icon != NULL)

    ret = iface->get_symbolic_icon (volume);

  else

    ret = g_themed_icon_new_with_default_fallbacks ("folder-remote-symbolic");

  return ret;

}

/**

 * g_volume_get_uuid:

 * @volume: a #GVolume

 * 

 * Gets the UUID for the @volume. The reference is typically based on

 * the file system UUID for the volume in question and should be

 * considered an opaque string. Returns %NULL if there is no UUID

 * available.

 * 

 * Returns: (nullable) (transfer full): the UUID for @volume or %NULL if no UUID

 *     can be computed.

 *     The returned string should be freed with g_free() 

 *     when no longer needed.

 */

char *

g_volume_get_uuid (GVolume *volume)

{

  GVolumeIface *iface;

  g_return_val_if_fail (G_IS_VOLUME (volume), NULL);

  iface = G_VOLUME_GET_IFACE (volume);

  return (* iface->get_uuid) (volume);

}

/**

 * g_volume_get_drive:

 * @volume: a #GVolume

 * 

 * Gets the drive for the @volume.

 *

 * Returns: (transfer full) (nullable): a #GDrive or %NULL if @volume is not

 *     associated with a drive. The returned object should be unreffed

 *     with g_object_unref() when no longer needed.

 */

GDrive *

g_volume_get_drive (GVolume *volume)

{

  GVolumeIface *iface;

  g_return_val_if_fail (G_IS_VOLUME (volume), NULL);

  iface = G_VOLUME_GET_IFACE (volume);

  return (* iface->get_drive) (volume);

}

/**

 * g_volume_get_mount:

 * @volume: a #GVolume

 * 

 * Gets the mount for the @volume.

 *

 * Returns: (transfer full) (nullable): a #GMount or %NULL if @volume isn't mounted.

 *     The returned object should be unreffed with g_object_unref()

 *     when no longer needed.

 */

GMount *

g_volume_get_mount (GVolume *volume)

{

  GVolumeIface *iface;

  g_return_val_if_fail (G_IS_VOLUME (volume), NULL);

  iface = G_VOLUME_GET_IFACE (volume);

  return (* iface->get_mount) (volume);

}

/**

 * g_volume_can_mount:

 * @volume: a #GVolume

 * 

 * Checks if a volume can be mounted.

 * 

 * Returns: %TRUE if the @volume can be mounted. %FALSE otherwise

 */

gboolean

g_volume_can_mount (GVolume *volume)

{

  GVolumeIface *iface;

  g_return_val_if_fail (G_IS_VOLUME (volume), FALSE);

  iface = G_VOLUME_GET_IFACE (volume);

  if (iface->can_mount == NULL)

    return FALSE;

  return (* iface->can_mount) (volume);

}

/**

 * g_volume_can_eject:

 * @volume: a #GVolume

 * 

 * Checks if a volume can be ejected.

 * 

 * Returns: %TRUE if the @volume can be ejected. %FALSE otherwise

 */

gboolean

g_volume_can_eject (GVolume *volume)

{

  GVolumeIface *iface;

  g_return_val_if_fail (G_IS_VOLUME (volume), FALSE);

  iface = G_VOLUME_GET_IFACE (volume);

  if (iface->can_eject == NULL)

    return FALSE;

  return (* iface->can_eject) (volume);

}

/**

 * g_volume_should_automount:

 * @volume: a #GVolume

 *

 * Returns whether the volume should be automatically mounted.

 * 

 * Returns: %TRUE if the volume should be automatically mounted

 */

gboolean

g_volume_should_automount (GVolume *volume)

{

  GVolumeIface *iface;

  g_return_val_if_fail (G_IS_VOLUME (volume), FALSE);

  iface = G_VOLUME_GET_IFACE (volume);

  if (iface->should_automount == NULL)

    return FALSE;

  return (* iface->should_automount) (volume);

}

/**

 * g_volume_mount:

 * @volume: a #GVolume

 * @flags: flags affecting the operation

 * @mount_operation: (nullable): a #GMountOperation or %NULL to avoid user interaction

 * @cancellable: (nullable): optional #GCancellable object, %NULL to ignore

 * @callback: (nullable): a #GAsyncReadyCallback, or %NULL

 * @user_data: user data that gets passed to @callback

 * 

 * Mounts a volume. This is an asynchronous operation, and is

 * finished by calling g_volume_mount_finish() with the @volume

 * and #GAsyncResult returned in the @callback.

 *

 * Virtual: mount_fn

 */

void

g_volume_mount (GVolume             *volume,

    GMountMountFlags     flags,

                GMountOperation     *mount_operation,

                GCancellable        *cancellable,

                GAsyncReadyCallback  callback,

                gpointer             user_data)

{

  GVolumeIface *iface;

  g_return_if_fail (G_IS_VOLUME (volume));

  iface = G_VOLUME_GET_IFACE (volume);

  if (iface->mount_fn == NULL)

    {

      g_task_report_new_error (volume, callback, user_data,

                               g_volume_mount,

                               G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,

                               _("volume doesn’t implement mount"));

      return;

    }

  (* iface->mount_fn) (volume, flags, mount_operation, cancellable, callback, user_data);

}

/**

 * g_volume_mount_finish:

 * @volume: a #GVolume

 * @result: a #GAsyncResult

 * @error: a #GError location to store an error, or %NULL to ignore

 * 

 * Finishes mounting a volume. If any errors occurred during the operation,

 * @error will be set to contain the errors and %FALSE will be returned.

 *

 * If the mount operation succeeded, g_volume_get_mount() on @volume

 * is guaranteed to return the mount right after calling this

 * function; there's no need to listen for the 'mount-added' signal on

 * #GVolumeMonitor.

 * 

 * Returns: %TRUE, %FALSE if operation failed

 */

gboolean

g_volume_mount_finish (GVolume       *volume,

                       GAsyncResult  *result,

                       GError       **error)

{

  GVolumeIface *iface;

  g_return_val_if_fail (G_IS_VOLUME (volume), FALSE);

  g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);

  if (g_async_result_legacy_propagate_error (result, error))

    return FALSE;

  else if (g_async_result_is_tagged (result, g_volume_mount))

    return g_task_propagate_boolean (G_TASK (result), error);

  iface = G_VOLUME_GET_IFACE (volume);

  return (* iface->mount_finish) (volume, result, error);

}

/**

 * g_volume_eject:

 * @volume: a #GVolume

 * @flags: flags affecting the unmount if required for eject

 * @cancellable: (nullable): optional #GCancellable object, %NULL to ignore

 * @callback: (nullable): a #GAsyncReadyCallback, or %NULL

 * @user_data: user data that gets passed to @callback

 * 

 * Ejects a volume. This is an asynchronous operation, and is

 * finished by calling g_volume_eject_finish() with the @volume

 * and #GAsyncResult returned in the @callback.

 *

 * Deprecated: 2.22: Use g_volume_eject_with_operation() instead.

 */

void

g_volume_eject (GVolume             *volume,

    GMountUnmountFlags   flags,

                GCancellable        *cancellable,

                GAsyncReadyCallback  callback,

                gpointer             user_data)

{

  GVolumeIface *iface;

  g_return_if_fail (G_IS_VOLUME (volume));

  iface = G_VOLUME_GET_IFACE (volume);

  if (iface->eject == NULL)

    {

      g_task_report_new_error (volume, callback, user_data,

                               g_volume_eject_with_operation,

                               G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,

                               _("volume doesn’t implement eject"));

      return;

    }

  (* iface->eject) (volume, flags, cancellable, callback, user_data);

}

/**

 * g_volume_eject_finish:

 * @volume: pointer to a #GVolume

 * @result: a #GAsyncResult

 * @error: a #GError location to store an error, or %NULL to ignore

 * 

 * Finishes ejecting a volume. If any errors occurred during the operation,

 * @error will be set to contain the errors and %FALSE will be returned.

 * 

 * Returns: %TRUE, %FALSE if operation failed

 *

 * Deprecated: 2.22: Use g_volume_eject_with_operation_finish() instead.

 **/

gboolean

g_volume_eject_finish (GVolume       *volume,

                       GAsyncResult  *result,

                       GError       **error)

{

  GVolumeIface *iface;

  g_return_val_if_fail (G_IS_VOLUME (volume), FALSE);

  g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);

  if (g_async_result_legacy_propagate_error (result, error))

    return FALSE;

  if (g_async_result_is_tagged (result, g_volume_eject_with_operation))

    return g_task_propagate_boolean (G_TASK (result), error);

  iface = G_VOLUME_GET_IFACE (volume);

  return (* iface->eject_finish) (volume, result, error);

}

/**

 * g_volume_eject_with_operation:

 * @volume: a #GVolume

 * @flags: flags affecting the unmount if required for eject

 * @mount_operation: (nullable): a #GMountOperation or %NULL to

 *     avoid user interaction

 * @cancellable: (nullable): optional #GCancellable object, %NULL to ignore

 * @callback: (nullable): a #GAsyncReadyCallback, or %NULL

 * @user_data: user data passed to @callback

 *

 * Ejects a volume. This is an asynchronous operation, and is

 * finished by calling g_volume_eject_with_operation_finish() with the @volume

 * and #GAsyncResult data returned in the @callback.

 *

 * Since: 2.22

 **/

void

g_volume_eject_with_operation (GVolume              *volume,

                               GMountUnmountFlags   flags,

                               GMountOperation     *mount_operation,

                               GCancellable        *cancellable,

                               GAsyncReadyCallback  callback,

                               gpointer             user_data)

{

  GVolumeIface *iface;

  g_return_if_fail (G_IS_VOLUME (volume));

  iface = G_VOLUME_GET_IFACE (volume);

  if (iface->eject == NULL && iface->eject_with_operation == NULL)

    {

      g_task_report_new_error (volume, callback, user_data,

                               g_volume_eject_with_operation,

                               G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,

                               /* Translators: This is an error

                                * message for volume objects that

                                * don't implement any of eject or eject_with_operation. */

                               _("volume doesn’t implement eject or eject_with_operation"));

      return;

    }

  if (iface->eject_with_operation != NULL)

    (* iface->eject_with_operation) (volume, flags, mount_operation, cancellable, callback, user_data);

  else

    (* iface->eject) (volume, flags, cancellable, callback, user_data);

}

/**

 * g_volume_eject_with_operation_finish:

 * @volume: a #GVolume

 * @result: a #GAsyncResult

 * @error: a #GError location to store the error occurring, or %NULL

 *

 * Finishes ejecting a volume. If any errors occurred during the operation,

 * @error will be set to contain the errors and %FALSE will be returned.

 *

 * Returns: %TRUE if the volume was successfully ejected. %FALSE otherwise

 *

 * Since: 2.22

 **/

gboolean

g_volume_eject_with_operation_finish (GVolume        *volume,

                                      GAsyncResult  *result,

                                      GError       **error)

{

  GVolumeIface *iface;

  g_return_val_if_fail (G_IS_VOLUME (volume), FALSE);

  g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);

  if (g_async_result_legacy_propagate_error (result, error))

    return FALSE;

  else if (g_async_result_is_tagged (result, g_volume_eject_with_operation))

    return g_task_propagate_boolean (G_TASK (result), error);

  iface = G_VOLUME_GET_IFACE (volume);

  if (iface->eject_with_operation_finish != NULL)

    return (* iface->eject_with_operation_finish) (volume, result, error);

  else

    return (* iface->eject_finish) (volume, result, error);

}

/**

 * g_volume_get_identifier:

 * @volume: a #GVolume

 * @kind: the kind of identifier to return

 *

 * Gets the identifier of the given kind for @volume. 

 * See the [introduction][volume-identifier] for more

 * information about volume identifiers.

 *

 * Returns: (nullable) (transfer full): a newly allocated string containing the

 *     requested identifier, or %NULL if the #GVolume

 *     doesn't have this kind of identifier

 */

char *

g_volume_get_identifier (GVolume    *volume,

       const char *kind)

{

  GVolumeIface *iface;

  g_return_val_if_fail (G_IS_VOLUME (volume), NULL);

  g_return_val_if_fail (kind != NULL, NULL);

  iface = G_VOLUME_GET_IFACE (volume);

  if (iface->get_identifier == NULL)

    return NULL;

  return (* iface->get_identifier) (volume, kind);

}

/**

 * g_volume_enumerate_identifiers:

 * @volume: a #GVolume

 * 

 * Gets the kinds of [identifiers][volume-identifier] that @volume has.

 * Use g_volume_get_identifier() to obtain the identifiers themselves.

 *

 * Returns: (array zero-terminated=1) (transfer full): a %NULL-terminated array

 *   of strings containing kinds of identifiers. Use g_strfreev() to free.

 */

char **

g_volume_enumerate_identifiers (GVolume *volume)

{

  GVolumeIface *iface;

  g_return_val_if_fail (G_IS_VOLUME (volume), NULL);

  iface = G_VOLUME_GET_IFACE (volume);

  if (iface->enumerate_identifiers == NULL)

    return NULL;

  return (* iface->enumerate_identifiers) (volume);

}

/**

 * g_volume_get_activation_root:

 * @volume: a #GVolume

 *

 * Gets the activation root for a #GVolume if it is known ahead of

 * mount time. Returns %NULL otherwise. If not %NULL and if @volume

 * is mounted, then the result of g_mount_get_root() on the

 * #GMount object obtained from g_volume_get_mount() will always

 * either be equal or a prefix of what this function returns. In

 * other words, in code

 *

 * |[<!-- language="C" -->

 *   GMount *mount;

 *   GFile *mount_root

 *   GFile *volume_activation_root;

 *

 *   mount = g_volume_get_mount (volume); // mounted, so never NULL

 *   mount_root = g_mount_get_root (mount);

 *   volume_activation_root = g_volume_get_activation_root (volume); // assume not NULL

 * ]|

 * then the expression

 * |[<!-- language="C" -->

 *   (g_file_has_prefix (volume_activation_root, mount_root) ||

 *    g_file_equal (volume_activation_root, mount_root))

 * ]|

 * will always be %TRUE.

 *

 * Activation roots are typically used in #GVolumeMonitor

 * implementations to find the underlying mount to shadow, see

 * g_mount_is_shadowed() for more details.

 *

 * Returns: (nullable) (transfer full): the activation root of @volume

 *     or %NULL. Use g_object_unref() to free.

 *

 * Since: 2.18

 */

GFile *

g_volume_get_activation_root (GVolume *volume)

{

  GVolumeIface *iface;

  g_return_val_if_fail (G_IS_VOLUME (volume), NULL);

  iface = G_VOLUME_GET_IFACE (volume);

  if (iface->get_activation_root == NULL)

    return NULL;

  return (* iface->get_activation_root) (volume);

}

/**

 * g_volume_get_sort_key:

 * @volume: a #GVolume

 *

 * Gets the sort key for @volume, if any.

 *

 * Returns: (nullable): Sorting key for @volume or %NULL if no such key is available

 *

 * Since: 2.32

 */

const gchar *

g_volume_get_sort_key (GVolume *volume)

{

  const gchar *ret = NULL;

  GVolumeIface *iface;

  g_return_val_if_fail (G_IS_VOLUME (volume), NULL);

  iface = G_VOLUME_GET_IFACE (volume);

  if (iface->get_sort_key != NULL)

    ret = iface->get_sort_key (volume);

  return ret;

}