/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */

/* GIO - GLib Input, Output and Streaming Library

 * 

 * Copyright (C) 2006-2008 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 <string.h>

#include "gmount.h"

#include "gmountprivate.h"

#include "gthemedicon.h"

#include "gasyncresult.h"

#include "gtask.h"

#include "gioerror.h"

#include "glibintl.h"

/**

 * SECTION:gmount

 * @short_description: Mount management

 * @include: gio/gio.h

 * @see_also: GVolume, GUnixMountEntry, GUnixMountPoint

 *

 * The #GMount interface represents user-visible mounts. Note, when 

 * porting from GnomeVFS, #GMount is the moral equivalent of #GnomeVFSVolume.

 *

 * #GMount is a "mounted" filesystem that you can access. Mounted is in

 * quotes because it's not the same as a unix mount, it might be a gvfs

 * mount, but you can still access the files on it if you use GIO. Might or

 * might not be related to a volume object.

 * 

 * Unmounting a #GMount instance is an asynchronous operation. For

 * more information about asynchronous operations, see #GAsyncResult

 * and #GTask. To unmount a #GMount instance, first call

 * g_mount_unmount_with_operation() with (at least) the #GMount instance and a

 * #GAsyncReadyCallback.  The callback will be fired when the

 * operation has resolved (either with success or failure), and a

 * #GAsyncResult structure will be passed to the callback.  That

 * callback should then call g_mount_unmount_with_operation_finish() with the #GMount

 * and the #GAsyncResult data to see if the operation was completed

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

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

 **/

typedef GMountIface GMountInterface;

G_DEFINE_INTERFACE (GMount, g_mount, G_TYPE_OBJECT)

static void

g_mount_default_init (GMountInterface *iface)

{

  /**

   * GMount::changed:

   * @mount: the object on which the signal is emitted

   *

   * Emitted when the mount has been changed.

   **/

  g_signal_new (I_("changed"),

                G_TYPE_MOUNT,

                G_SIGNAL_RUN_LAST,

                G_STRUCT_OFFSET (GMountIface, changed),

                NULL, NULL,

                g_cclosure_marshal_VOID__VOID,

                G_TYPE_NONE, 0);

  /**

   * GMount::unmounted:

   * @mount: the object on which the signal is emitted

   *

   * This signal is emitted when the #GMount have been

   * unmounted. If the recipient is holding references to the

   * object they should release them so the object can be

   * finalized.

   **/

  g_signal_new (I_("unmounted"),

                G_TYPE_MOUNT,

                G_SIGNAL_RUN_LAST,

                G_STRUCT_OFFSET (GMountIface, unmounted),

                NULL, NULL,

                g_cclosure_marshal_VOID__VOID,

                G_TYPE_NONE, 0);

  /**

   * GMount::pre-unmount:

   * @mount: the object on which the signal is emitted

   *

   * This signal may be emitted when the #GMount is about to be

   * unmounted.

   *

   * This signal depends on the backend and is only emitted if

   * GIO was used to unmount.

   *

   * Since: 2.22

   **/

  g_signal_new (I_("pre-unmount"),

                G_TYPE_MOUNT,

                G_SIGNAL_RUN_LAST,

                G_STRUCT_OFFSET (GMountIface, pre_unmount),

                NULL, NULL,

                g_cclosure_marshal_VOID__VOID,

                G_TYPE_NONE, 0);

}

/**

 * g_mount_get_root:

 * @mount: a #GMount.

 * 

 * Gets the root directory on @mount.

 * 

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

 *      The returned object should be unreffed with 

 *      g_object_unref() when no longer needed.

 **/

GFile *

g_mount_get_root (GMount *mount)

{

  GMountIface *iface;

  g_return_val_if_fail (G_IS_MOUNT (mount), NULL);

  iface = G_MOUNT_GET_IFACE (mount);

  return (* iface->get_root) (mount);

}

/**

 * g_mount_get_default_location:

 * @mount: a #GMount.

 *

 * Gets the default location of @mount. The default location of the given

 * @mount is a path that reflects the main entry point for the user (e.g.

 * the home directory, or the root of the volume).

 *

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

 *      The returned object should be unreffed with

 *      g_object_unref() when no longer needed.

 **/

GFile *

g_mount_get_default_location (GMount *mount)

{

  GMountIface *iface;

  GFile       *file;

  g_return_val_if_fail (G_IS_MOUNT (mount), NULL);

  iface = G_MOUNT_GET_IFACE (mount);

  /* Fallback to get_root when default_location () is not available */

  if (iface->get_default_location)

    file = (* iface->get_default_location) (mount);

  else

    file = (* iface->get_root) (mount);

  return file;

}

/**

 * g_mount_get_name:

 * @mount: a #GMount.

 * 

 * Gets the name of @mount.

 * 

 * Returns: the name for the given @mount. 

 *     The returned string should be freed with g_free()

 *     when no longer needed.

 **/

char *

g_mount_get_name (GMount *mount)

{

  GMountIface *iface;

  g_return_val_if_fail (G_IS_MOUNT (mount), NULL);

  iface = G_MOUNT_GET_IFACE (mount);

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

}

/**

 * g_mount_get_icon:

 * @mount: a #GMount.

 * 

 * Gets the icon for @mount.

 * 

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

 *      The returned object should be unreffed with 

 *      g_object_unref() when no longer needed.

 **/

GIcon *

g_mount_get_icon (GMount *mount)

{

  GMountIface *iface;

  g_return_val_if_fail (G_IS_MOUNT (mount), NULL);

  iface = G_MOUNT_GET_IFACE (mount);

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

}

/**

 * g_mount_get_symbolic_icon:

 * @mount: a #GMount.

 * 

 * Gets the symbolic icon for @mount.

 * 

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

 *      The returned object should be unreffed with 

 *      g_object_unref() when no longer needed.

 *

 * Since: 2.34

 **/

GIcon *

g_mount_get_symbolic_icon (GMount *mount)

{

  GMountIface *iface;

  GIcon *ret;

  g_return_val_if_fail (G_IS_MOUNT (mount), NULL);

  iface = G_MOUNT_GET_IFACE (mount);

  if (iface->get_symbolic_icon != NULL)

    ret = iface->get_symbolic_icon (mount);

  else

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

  return ret;

}

/**

 * g_mount_get_uuid:

 * @mount: a #GMount.

 * 

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

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

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

 * available.

 * 

 * Returns: the UUID for @mount or %NULL if no UUID can be computed.

 *     The returned string should be freed with g_free()

 *     when no longer needed.

 **/

char *

g_mount_get_uuid (GMount *mount)

{

  GMountIface *iface;

  g_return_val_if_fail (G_IS_MOUNT (mount), NULL);

  iface = G_MOUNT_GET_IFACE (mount);

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

}

/**

 * g_mount_get_volume:

 * @mount: a #GMount.

 * 

 * Gets the volume for the @mount.

 * 

 * Returns: (transfer full): a #GVolume or %NULL if @mount is not associated with a volume.

 *      The returned object should be unreffed with 

 *      g_object_unref() when no longer needed.

 **/

GVolume *

g_mount_get_volume (GMount *mount)

{

  GMountIface *iface;

  g_return_val_if_fail (G_IS_MOUNT (mount), NULL);

  iface = G_MOUNT_GET_IFACE (mount);

  return (* iface->get_volume) (mount);

}

/**

 * g_mount_get_drive:

 * @mount: a #GMount.

 * 

 * Gets the drive for the @mount.

 *

 * This is a convenience method for getting the #GVolume and then

 * using that object to get the #GDrive.

 * 

 * Returns: (transfer full): a #GDrive or %NULL if @mount is not associated with a volume or a drive.

 *      The returned object should be unreffed with 

 *      g_object_unref() when no longer needed.

 **/

GDrive *

g_mount_get_drive (GMount *mount)

{

  GMountIface *iface;

  g_return_val_if_fail (G_IS_MOUNT (mount), NULL);

  iface = G_MOUNT_GET_IFACE (mount);

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

}

/**

 * g_mount_can_unmount: 

 * @mount: a #GMount.

 * 

 * Checks if @mount can be unmounted.

 * 

 * Returns: %TRUE if the @mount can be unmounted.

 **/

gboolean

g_mount_can_unmount (GMount *mount)

{

  GMountIface *iface;

  g_return_val_if_fail (G_IS_MOUNT (mount), FALSE);

  iface = G_MOUNT_GET_IFACE (mount);

  return (* iface->can_unmount) (mount);

}

/**

 * g_mount_can_eject: 

 * @mount: a #GMount.

 * 

 * Checks if @mount can be ejected.

 * 

 * Returns: %TRUE if the @mount can be ejected.

 **/

gboolean

g_mount_can_eject (GMount *mount)

{

  GMountIface *iface;

  g_return_val_if_fail (G_IS_MOUNT (mount), FALSE);

  iface = G_MOUNT_GET_IFACE (mount);

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

}

/**

 * g_mount_unmount:

 * @mount: a #GMount.

 * @flags: flags affecting the operation

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

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

 * @user_data: user data passed to @callback.

 * 

 * Unmounts a mount. This is an asynchronous operation, and is 

 * finished by calling g_mount_unmount_finish() with the @mount 

 * and #GAsyncResult data returned in the @callback.

 *

 * Deprecated: 2.22: Use g_mount_unmount_with_operation() instead.

 **/

void

g_mount_unmount (GMount              *mount,

                 GMountUnmountFlags   flags,

                 GCancellable        *cancellable,

                 GAsyncReadyCallback  callback,

                 gpointer             user_data)

{

  GMountIface *iface;

  g_return_if_fail (G_IS_MOUNT (mount));

  iface = G_MOUNT_GET_IFACE (mount);

  if (iface->unmount == NULL)

    {

      g_task_report_new_error (mount, callback, user_data,

                               g_mount_unmount_with_operation,

                               G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,

                               /* Translators: This is an error

                                * message for mount objects that

                                * don't implement unmount. */

                               _("mount doesn’t implement “unmount”"));

      return;

    }

  (* iface->unmount) (mount, flags, cancellable, callback, user_data);

}

/**

 * g_mount_unmount_finish:

 * @mount: a #GMount.

 * @result: a #GAsyncResult.

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

 *     ignore.

 * 

 * Finishes unmounting a mount. If any errors occurred during the operation, 

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

 * 

 * Returns: %TRUE if the mount was successfully unmounted. %FALSE otherwise.

 *

 * Deprecated: 2.22: Use g_mount_unmount_with_operation_finish() instead.

 **/

gboolean

g_mount_unmount_finish (GMount        *mount,

                        GAsyncResult  *result,

                        GError       **error)

{

  GMountIface *iface;

  g_return_val_if_fail (G_IS_MOUNT (mount), 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_mount_unmount_with_operation))

    return g_task_propagate_boolean (G_TASK (result), error);

  iface = G_MOUNT_GET_IFACE (mount);

  return (* iface->unmount_finish) (mount, result, error);

}

/**

 * g_mount_eject:

 * @mount: a #GMount.

 * @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 passed to @callback.

 * 

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

 * finished by calling g_mount_eject_finish() with the @mount 

 * and #GAsyncResult data returned in the @callback.

 *

 * Deprecated: 2.22: Use g_mount_eject_with_operation() instead.

 **/

void

g_mount_eject (GMount              *mount,

               GMountUnmountFlags   flags,

               GCancellable        *cancellable,

               GAsyncReadyCallback  callback,

               gpointer             user_data)

{

  GMountIface *iface;

  g_return_if_fail (G_IS_MOUNT (mount));

  iface = G_MOUNT_GET_IFACE (mount);

  if (iface->eject == NULL)

    {

      g_task_report_new_error (mount, callback, user_data,

                               g_mount_eject_with_operation,

                               G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,

                               /* Translators: This is an error

                                * message for mount objects that

                                * don't implement eject. */

                               _("mount doesn’t implement “eject”"));

      return;

    }

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

}

/**

 * g_mount_eject_finish:

 * @mount: a #GMount.

 * @result: a #GAsyncResult.

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

 *     ignore.

 * 

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

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

 * 

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

 *

 * Deprecated: 2.22: Use g_mount_eject_with_operation_finish() instead.

 **/

gboolean

g_mount_eject_finish (GMount        *mount,

                      GAsyncResult  *result,

                      GError       **error)

{

  GMountIface *iface;

  g_return_val_if_fail (G_IS_MOUNT (mount), 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_mount_eject_with_operation))

    return g_task_propagate_boolean (G_TASK (result), error);

  iface = G_MOUNT_GET_IFACE (mount);

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

}

/**

 * g_mount_unmount_with_operation:

 * @mount: a #GMount.

 * @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 passed to @callback.

 *

 * Unmounts a mount. This is an asynchronous operation, and is

 * finished by calling g_mount_unmount_with_operation_finish() with the @mount 

 * and #GAsyncResult data returned in the @callback.

 *

 * Since: 2.22

 **/

void

g_mount_unmount_with_operation (GMount              *mount,

                                GMountUnmountFlags   flags,

                                GMountOperation     *mount_operation,

                                GCancellable        *cancellable,

                                GAsyncReadyCallback  callback,

                                gpointer             user_data)

{

  GMountIface *iface;

  g_return_if_fail (G_IS_MOUNT (mount));

  iface = G_MOUNT_GET_IFACE (mount);

  if (iface->unmount == NULL && iface->unmount_with_operation == NULL)

    {

      g_task_report_new_error (mount, callback, user_data,

                               g_mount_unmount_with_operation,

                               G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,

                               /* Translators: This is an error

                                * message for mount objects that

                                * don't implement any of unmount or unmount_with_operation. */

                               _("mount doesn’t implement “unmount” or “unmount_with_operation”"));

      return;

    }

  if (iface->unmount_with_operation != NULL)

    (* iface->unmount_with_operation) (mount, flags, mount_operation, cancellable, callback, user_data);

  else

    (* iface->unmount) (mount, flags, cancellable, callback, user_data);

}

/**

 * g_mount_unmount_with_operation_finish:

 * @mount: a #GMount.

 * @result: a #GAsyncResult.

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

 *     ignore.

 *

 * Finishes unmounting a mount. If any errors occurred during the operation,

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

 *

 * Returns: %TRUE if the mount was successfully unmounted. %FALSE otherwise.

 *

 * Since: 2.22

 **/

gboolean

g_mount_unmount_with_operation_finish (GMount        *mount,

                                       GAsyncResult  *result,

                                       GError       **error)

{

  GMountIface *iface;

  g_return_val_if_fail (G_IS_MOUNT (mount), 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_mount_unmount_with_operation))

    return g_task_propagate_boolean (G_TASK (result), error);

  iface = G_MOUNT_GET_IFACE (mount);

  if (iface->unmount_with_operation_finish != NULL)

    return (* iface->unmount_with_operation_finish) (mount, result, error);

  else

    return (* iface->unmount_finish) (mount, result, error);

}

/**

 * g_mount_eject_with_operation:

 * @mount: a #GMount.

 * @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 mount. This is an asynchronous operation, and is

 * finished by calling g_mount_eject_with_operation_finish() with the @mount

 * and #GAsyncResult data returned in the @callback.

 *

 * Since: 2.22

 **/

void

g_mount_eject_with_operation (GMount              *mount,

                              GMountUnmountFlags   flags,

                              GMountOperation     *mount_operation,

                              GCancellable        *cancellable,

                              GAsyncReadyCallback  callback,

                              gpointer             user_data)

{

  GMountIface *iface;

  g_return_if_fail (G_IS_MOUNT (mount));

  iface = G_MOUNT_GET_IFACE (mount);

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

    {

      g_task_report_new_error (mount, callback, user_data,

                               g_mount_eject_with_operation,

                               G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,

                               /* Translators: This is an error

                                * message for mount objects that

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

                               _("mount doesn’t implement “eject” or “eject_with_operation”"));

      return;

    }

  if (iface->eject_with_operation != NULL)

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

  else

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

}

/**

 * g_mount_eject_with_operation_finish:

 * @mount: a #GMount.

 * @result: a #GAsyncResult.

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

 *     ignore.

 *

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

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

 *

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

 *

 * Since: 2.22

 **/

gboolean

g_mount_eject_with_operation_finish (GMount        *mount,

                                     GAsyncResult  *result,

                                     GError       **error)

{

  GMountIface *iface;

  g_return_val_if_fail (G_IS_MOUNT (mount), 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_mount_eject_with_operation))

    return g_task_propagate_boolean (G_TASK (result), error);

  iface = G_MOUNT_GET_IFACE (mount);

  if (iface->eject_with_operation_finish != NULL)

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

  else

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

}

/**

 * g_mount_remount:

 * @mount: a #GMount.

 * @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 passed to @callback.

 * 

 * Remounts a mount. This is an asynchronous operation, and is 

 * finished by calling g_mount_remount_finish() with the @mount 

 * and #GAsyncResults data returned in the @callback.

 *

 * Remounting is useful when some setting affecting the operation

 * of the volume has been changed, as these may need a remount to

 * take affect. While this is semantically equivalent with unmounting

 * and then remounting not all backends might need to actually be

 * unmounted.

 **/

void

g_mount_remount (GMount              *mount,

                 GMountMountFlags     flags,

                 GMountOperation     *mount_operation,

                 GCancellable        *cancellable,

                 GAsyncReadyCallback  callback,

                 gpointer             user_data)

{

  GMountIface *iface;

  g_return_if_fail (G_IS_MOUNT (mount));

  iface = G_MOUNT_GET_IFACE (mount);

  if (iface->remount == NULL)

    { 

      g_task_report_new_error (mount, callback, user_data,

                               g_mount_remount,

                               G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,

                               /* Translators: This is an error

                                * message for mount objects that

                                * don't implement remount. */

                               _("mount doesn’t implement “remount”"));

      return;

    }

  (* iface->remount) (mount, flags, mount_operation, cancellable, callback, user_data);

}

/**

 * g_mount_remount_finish:

 * @mount: a #GMount.

 * @result: a #GAsyncResult.

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

 *     ignore.

 * 

 * Finishes remounting a mount. If any errors occurred during the operation, 

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

 * 

 * Returns: %TRUE if the mount was successfully remounted. %FALSE otherwise.

 **/

gboolean

g_mount_remount_finish (GMount        *mount,

                        GAsyncResult  *result,

                        GError       **error)

{

  GMountIface *iface;

  g_return_val_if_fail (G_IS_MOUNT (mount), 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_mount_remount))

    return g_task_propagate_boolean (G_TASK (result), error);

  iface = G_MOUNT_GET_IFACE (mount);

  return (* iface->remount_finish) (mount, result, error);

}

/**

 * g_mount_guess_content_type:

 * @mount: a #GMount

 * @force_rescan: Whether to force a rescan of the content. 

 *     Otherwise a cached result will be used if available

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

 * @callback: a #GAsyncReadyCallback

 * @user_data: user data passed to @callback

 * 

 * Tries to guess the type of content stored on @mount. Returns one or

 * more textual identifiers of well-known content types (typically

 * prefixed with "x-content/"), e.g. x-content/image-dcf for camera 

 * memory cards. See the 

 * [shared-mime-info](http://www.freedesktop.org/wiki/Specifications/shared-mime-info-spec)

 * specification for more on x-content types.

 *

 * This is an asynchronous operation (see

 * g_mount_guess_content_type_sync() for the synchronous version), and

 * is finished by calling g_mount_guess_content_type_finish() with the

 * @mount and #GAsyncResult data returned in the @callback.

 *

 * Since: 2.18

 */

void

g_mount_guess_content_type (GMount              *mount,

                            gboolean             force_rescan,

                            GCancellable        *cancellable,

                            GAsyncReadyCallback  callback,

                            gpointer             user_data)

{

  GMountIface *iface;

  g_return_if_fail (G_IS_MOUNT (mount));

  iface = G_MOUNT_GET_IFACE (mount);

  if (iface->guess_content_type == NULL)

    {

      g_task_report_new_error (mount, callback, user_data,

                               g_mount_guess_content_type,

                               G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,

                               /* Translators: This is an error

                                * message for mount objects that

                                * don't implement content type guessing. */

                               _("mount doesn’t implement content type guessing"));

      return;

    }

  (* iface->guess_content_type) (mount, force_rescan, cancellable, callback, user_data);

}

/**

 * g_mount_guess_content_type_finish:

 * @mount: a #GMount

 * @result: a #GAsyncResult

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

 *     ignore

 * 

 * Finishes guessing content types of @mount. If any errors occurred

 * during the operation, @error will be set to contain the errors and

 * %FALSE will be returned. In particular, you may get an 

 * %G_IO_ERROR_NOT_SUPPORTED if the mount does not support content 

 * guessing.

 * 

 * Returns: (transfer full) (element-type utf8): a %NULL-terminated array of content types or %NULL on error. 

 *     Caller should free this array with g_strfreev() when done with it.

 *

 * Since: 2.18

 **/

gchar **

g_mount_guess_content_type_finish (GMount        *mount,

                                   GAsyncResult  *result,

                                   GError       **error)

{

  GMountIface *iface;

  g_return_val_if_fail (G_IS_MOUNT (mount), NULL);

  g_return_val_if_fail (G_IS_ASYNC_RESULT (result), NULL);

  if (g_async_result_legacy_propagate_error (result, error))

    return NULL;

  else if (g_async_result_is_tagged (result, g_mount_guess_content_type))

    return g_task_propagate_pointer (G_TASK (result), error);

  iface = G_MOUNT_GET_IFACE (mount);

  return (* iface->guess_content_type_finish) (mount, result, error);

}

/**

 * g_mount_guess_content_type_sync:

 * @mount: a #GMount

 * @force_rescan: Whether to force a rescan of the content.

 *     Otherwise a cached result will be used if available

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

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

 *     ignore

 *

 * Tries to guess the type of content stored on @mount. Returns one or

 * more textual identifiers of well-known content types (typically

 * prefixed with "x-content/"), e.g. x-content/image-dcf for camera 

 * memory cards. See the 

 * [shared-mime-info](http://www.freedesktop.org/wiki/Specifications/shared-mime-info-spec)

 * specification for more on x-content types.

 *

 * This is an synchronous operation and as such may block doing IO;

 * see g_mount_guess_content_type() for the asynchronous version.

 *

 * Returns: (transfer full) (element-type utf8): a %NULL-terminated array of content types or %NULL on error.

 *     Caller should free this array with g_strfreev() when done with it.

 *

 * Since: 2.18

 */

char **

g_mount_guess_content_type_sync (GMount              *mount,

                                 gboolean             force_rescan,

                                 GCancellable        *cancellable,

                                 GError             **error)

{

  GMountIface *iface;