Import Upstream version 2.72.4
This commit is contained in:
evinadmin
commit
4ef3ff9793
2003 changed files with 1332420 additions and 0 deletions
476
gio/gpermission.c
Normal file
476
gio/gpermission.c
Normal file
|
|
@ -0,0 +1,476 @@
|
|||
/*
|
||||
* Copyright © 2010 Codethink Limited
|
||||
*
|
||||
* 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: Ryan Lortie <desrt@desrt.ca>
|
||||
*/
|
||||
|
||||
#include "config.h"
|
||||
|
||||
#include "gpermission.h"
|
||||
|
||||
#include "gioerror.h"
|
||||
#include "gioenums.h"
|
||||
#include "gasyncresult.h"
|
||||
#include "gtask.h"
|
||||
#include "glibintl.h"
|
||||
|
||||
|
||||
/**
|
||||
* SECTION:gpermission
|
||||
* @title: GPermission
|
||||
* @short_description: An object representing the permission
|
||||
* to perform a certain action
|
||||
* @include: gio/gio.h
|
||||
*
|
||||
* A #GPermission represents the status of the caller's permission to
|
||||
* perform a certain action.
|
||||
*
|
||||
* You can query if the action is currently allowed and if it is
|
||||
* possible to acquire the permission so that the action will be allowed
|
||||
* in the future.
|
||||
*
|
||||
* There is also an API to actually acquire the permission and one to
|
||||
* release it.
|
||||
*
|
||||
* As an example, a #GPermission might represent the ability for the
|
||||
* user to write to a #GSettings object. This #GPermission object could
|
||||
* then be used to decide if it is appropriate to show a "Click here to
|
||||
* unlock" button in a dialog and to provide the mechanism to invoke
|
||||
* when that button is clicked.
|
||||
**/
|
||||
|
||||
/**
|
||||
* GPermission:
|
||||
*
|
||||
* #GPermission is an opaque data structure and can only be accessed
|
||||
* using the following functions.
|
||||
**/
|
||||
|
||||
struct _GPermissionPrivate
|
||||
{
|
||||
gboolean allowed;
|
||||
gboolean can_acquire;
|
||||
gboolean can_release;
|
||||
};
|
||||
|
||||
enum {
|
||||
PROP_NONE,
|
||||
PROP_ALLOWED,
|
||||
PROP_CAN_ACQUIRE,
|
||||
PROP_CAN_RELEASE
|
||||
};
|
||||
|
||||
G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE (GPermission, g_permission, G_TYPE_OBJECT)
|
||||
|
||||
/**
|
||||
* g_permission_acquire:
|
||||
* @permission: a #GPermission instance
|
||||
* @cancellable: (nullable): a #GCancellable, or %NULL
|
||||
* @error: a pointer to a %NULL #GError, or %NULL
|
||||
*
|
||||
* Attempts to acquire the permission represented by @permission.
|
||||
*
|
||||
* The precise method by which this happens depends on the permission
|
||||
* and the underlying authentication mechanism. A simple example is
|
||||
* that a dialog may appear asking the user to enter their password.
|
||||
*
|
||||
* You should check with g_permission_get_can_acquire() before calling
|
||||
* this function.
|
||||
*
|
||||
* If the permission is acquired then %TRUE is returned. Otherwise,
|
||||
* %FALSE is returned and @error is set appropriately.
|
||||
*
|
||||
* This call is blocking, likely for a very long time (in the case that
|
||||
* user interaction is required). See g_permission_acquire_async() for
|
||||
* the non-blocking version.
|
||||
*
|
||||
* Returns: %TRUE if the permission was successfully acquired
|
||||
*
|
||||
* Since: 2.26
|
||||
*/
|
||||
gboolean
|
||||
g_permission_acquire (GPermission *permission,
|
||||
GCancellable *cancellable,
|
||||
GError **error)
|
||||
{
|
||||
g_return_val_if_fail (G_IS_PERMISSION (permission), FALSE);
|
||||
return G_PERMISSION_GET_CLASS (permission)
|
||||
->acquire (permission, cancellable, error);
|
||||
}
|
||||
|
||||
/**
|
||||
* g_permission_acquire_async:
|
||||
* @permission: a #GPermission instance
|
||||
* @cancellable: (nullable): a #GCancellable, or %NULL
|
||||
* @callback: the #GAsyncReadyCallback to call when done
|
||||
* @user_data: the user data to pass to @callback
|
||||
*
|
||||
* Attempts to acquire the permission represented by @permission.
|
||||
*
|
||||
* This is the first half of the asynchronous version of
|
||||
* g_permission_acquire().
|
||||
*
|
||||
* Since: 2.26
|
||||
**/
|
||||
void
|
||||
g_permission_acquire_async (GPermission *permission,
|
||||
GCancellable *cancellable,
|
||||
GAsyncReadyCallback callback,
|
||||
gpointer user_data)
|
||||
{
|
||||
g_return_if_fail (G_IS_PERMISSION (permission));
|
||||
G_PERMISSION_GET_CLASS (permission)
|
||||
->acquire_async (permission, cancellable, callback, user_data);
|
||||
}
|
||||
|
||||
/**
|
||||
* g_permission_acquire_finish:
|
||||
* @permission: a #GPermission instance
|
||||
* @result: the #GAsyncResult given to the #GAsyncReadyCallback
|
||||
* @error: a pointer to a %NULL #GError, or %NULL
|
||||
*
|
||||
* Collects the result of attempting to acquire the permission
|
||||
* represented by @permission.
|
||||
*
|
||||
* This is the second half of the asynchronous version of
|
||||
* g_permission_acquire().
|
||||
*
|
||||
* Returns: %TRUE if the permission was successfully acquired
|
||||
*
|
||||
* Since: 2.26
|
||||
**/
|
||||
gboolean
|
||||
g_permission_acquire_finish (GPermission *permission,
|
||||
GAsyncResult *result,
|
||||
GError **error)
|
||||
{
|
||||
g_return_val_if_fail (G_IS_PERMISSION (permission), FALSE);
|
||||
return G_PERMISSION_GET_CLASS (permission)
|
||||
->acquire_finish (permission, result, error);
|
||||
}
|
||||
|
||||
/**
|
||||
* g_permission_release:
|
||||
* @permission: a #GPermission instance
|
||||
* @cancellable: (nullable): a #GCancellable, or %NULL
|
||||
* @error: a pointer to a %NULL #GError, or %NULL
|
||||
*
|
||||
* Attempts to release the permission represented by @permission.
|
||||
*
|
||||
* The precise method by which this happens depends on the permission
|
||||
* and the underlying authentication mechanism. In most cases the
|
||||
* permission will be dropped immediately without further action.
|
||||
*
|
||||
* You should check with g_permission_get_can_release() before calling
|
||||
* this function.
|
||||
*
|
||||
* If the permission is released then %TRUE is returned. Otherwise,
|
||||
* %FALSE is returned and @error is set appropriately.
|
||||
*
|
||||
* This call is blocking, likely for a very long time (in the case that
|
||||
* user interaction is required). See g_permission_release_async() for
|
||||
* the non-blocking version.
|
||||
*
|
||||
* Returns: %TRUE if the permission was successfully released
|
||||
*
|
||||
* Since: 2.26
|
||||
**/
|
||||
gboolean
|
||||
g_permission_release (GPermission *permission,
|
||||
GCancellable *cancellable,
|
||||
GError **error)
|
||||
{
|
||||
g_return_val_if_fail (G_IS_PERMISSION (permission), FALSE);
|
||||
return G_PERMISSION_GET_CLASS (permission)
|
||||
->release (permission, cancellable, error);
|
||||
}
|
||||
|
||||
/**
|
||||
* g_permission_release_async:
|
||||
* @permission: a #GPermission instance
|
||||
* @cancellable: (nullable): a #GCancellable, or %NULL
|
||||
* @callback: the #GAsyncReadyCallback to call when done
|
||||
* @user_data: the user data to pass to @callback
|
||||
*
|
||||
* Attempts to release the permission represented by @permission.
|
||||
*
|
||||
* This is the first half of the asynchronous version of
|
||||
* g_permission_release().
|
||||
*
|
||||
* Since: 2.26
|
||||
**/
|
||||
void
|
||||
g_permission_release_async (GPermission *permission,
|
||||
GCancellable *cancellable,
|
||||
GAsyncReadyCallback callback,
|
||||
gpointer user_data)
|
||||
{
|
||||
g_return_if_fail (G_IS_PERMISSION (permission));
|
||||
G_PERMISSION_GET_CLASS (permission)
|
||||
->release_async (permission, cancellable, callback, user_data);
|
||||
}
|
||||
|
||||
/**
|
||||
* g_permission_release_finish:
|
||||
* @permission: a #GPermission instance
|
||||
* @result: the #GAsyncResult given to the #GAsyncReadyCallback
|
||||
* @error: a pointer to a %NULL #GError, or %NULL
|
||||
*
|
||||
* Collects the result of attempting to release the permission
|
||||
* represented by @permission.
|
||||
*
|
||||
* This is the second half of the asynchronous version of
|
||||
* g_permission_release().
|
||||
*
|
||||
* Returns: %TRUE if the permission was successfully released
|
||||
*
|
||||
* Since: 2.26
|
||||
**/
|
||||
gboolean
|
||||
g_permission_release_finish (GPermission *permission,
|
||||
GAsyncResult *result,
|
||||
GError **error)
|
||||
{
|
||||
g_return_val_if_fail (G_IS_PERMISSION (permission), FALSE);
|
||||
return G_PERMISSION_GET_CLASS (permission)
|
||||
->release_finish (permission, result, error);
|
||||
}
|
||||
|
||||
/**
|
||||
* g_permission_get_allowed:
|
||||
* @permission: a #GPermission instance
|
||||
*
|
||||
* Gets the value of the 'allowed' property. This property is %TRUE if
|
||||
* the caller currently has permission to perform the action that
|
||||
* @permission represents the permission to perform.
|
||||
*
|
||||
* Returns: the value of the 'allowed' property
|
||||
*
|
||||
* Since: 2.26
|
||||
**/
|
||||
gboolean
|
||||
g_permission_get_allowed (GPermission *permission)
|
||||
{
|
||||
g_return_val_if_fail (G_IS_PERMISSION (permission), FALSE);
|
||||
return permission->priv->allowed;
|
||||
}
|
||||
|
||||
/**
|
||||
* g_permission_get_can_acquire:
|
||||
* @permission: a #GPermission instance
|
||||
*
|
||||
* Gets the value of the 'can-acquire' property. This property is %TRUE
|
||||
* if it is generally possible to acquire the permission by calling
|
||||
* g_permission_acquire().
|
||||
*
|
||||
* Returns: the value of the 'can-acquire' property
|
||||
*
|
||||
* Since: 2.26
|
||||
**/
|
||||
gboolean
|
||||
g_permission_get_can_acquire (GPermission *permission)
|
||||
{
|
||||
g_return_val_if_fail (G_IS_PERMISSION (permission), FALSE);
|
||||
return permission->priv->can_acquire;
|
||||
}
|
||||
|
||||
/**
|
||||
* g_permission_get_can_release:
|
||||
* @permission: a #GPermission instance
|
||||
*
|
||||
* Gets the value of the 'can-release' property. This property is %TRUE
|
||||
* if it is generally possible to release the permission by calling
|
||||
* g_permission_release().
|
||||
*
|
||||
* Returns: the value of the 'can-release' property
|
||||
*
|
||||
* Since: 2.26
|
||||
**/
|
||||
gboolean
|
||||
g_permission_get_can_release (GPermission *permission)
|
||||
{
|
||||
g_return_val_if_fail (G_IS_PERMISSION (permission), FALSE);
|
||||
return permission->priv->can_release;
|
||||
}
|
||||
|
||||
/**
|
||||
* g_permission_impl_update:
|
||||
* @permission: a #GPermission instance
|
||||
* @allowed: the new value for the 'allowed' property
|
||||
* @can_acquire: the new value for the 'can-acquire' property
|
||||
* @can_release: the new value for the 'can-release' property
|
||||
*
|
||||
* This function is called by the #GPermission implementation to update
|
||||
* the properties of the permission. You should never call this
|
||||
* function except from a #GPermission implementation.
|
||||
*
|
||||
* GObject notify signals are generated, as appropriate.
|
||||
*
|
||||
* Since: 2.26
|
||||
**/
|
||||
void
|
||||
g_permission_impl_update (GPermission *permission,
|
||||
gboolean allowed,
|
||||
gboolean can_acquire,
|
||||
gboolean can_release)
|
||||
{
|
||||
GObject *object;
|
||||
|
||||
g_return_if_fail (G_IS_PERMISSION (permission));
|
||||
|
||||
object = G_OBJECT (permission);
|
||||
g_object_freeze_notify (object);
|
||||
|
||||
allowed = allowed != FALSE;
|
||||
if (allowed != permission->priv->allowed)
|
||||
{
|
||||
permission->priv->allowed = allowed;
|
||||
g_object_notify (object, "allowed");
|
||||
}
|
||||
|
||||
can_acquire = can_acquire != FALSE;
|
||||
if (can_acquire != permission->priv->can_acquire)
|
||||
{
|
||||
permission->priv->can_acquire = can_acquire;
|
||||
g_object_notify (object, "can-acquire");
|
||||
}
|
||||
|
||||
can_release = can_release != FALSE;
|
||||
if (can_release != permission->priv->can_release)
|
||||
{
|
||||
permission->priv->can_release = can_release;
|
||||
g_object_notify (object, "can-release");
|
||||
}
|
||||
|
||||
g_object_thaw_notify (object);
|
||||
}
|
||||
|
||||
static void
|
||||
g_permission_get_property (GObject *object, guint prop_id,
|
||||
GValue *value, GParamSpec *pspec)
|
||||
{
|
||||
GPermission *permission = G_PERMISSION (object);
|
||||
|
||||
switch (prop_id)
|
||||
{
|
||||
case PROP_ALLOWED:
|
||||
g_value_set_boolean (value, permission->priv->allowed);
|
||||
break;
|
||||
|
||||
case PROP_CAN_ACQUIRE:
|
||||
g_value_set_boolean (value, permission->priv->can_acquire);
|
||||
break;
|
||||
|
||||
case PROP_CAN_RELEASE:
|
||||
g_value_set_boolean (value, permission->priv->can_release);
|
||||
break;
|
||||
|
||||
default:
|
||||
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
g_permission_init (GPermission *permission)
|
||||
{
|
||||
permission->priv = g_permission_get_instance_private (permission);
|
||||
}
|
||||
|
||||
static gboolean
|
||||
acquire_or_release (GPermission *permission,
|
||||
GCancellable *cancellable,
|
||||
GError **error)
|
||||
{
|
||||
g_set_error_literal (error,
|
||||
G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
|
||||
"Can't acquire or release permission");
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
static void
|
||||
acquire_or_release_async (GPermission *permission,
|
||||
GCancellable *cancellable,
|
||||
GAsyncReadyCallback callback,
|
||||
gpointer user_data)
|
||||
{
|
||||
g_task_report_new_error (permission,
|
||||
callback, user_data,
|
||||
NULL,
|
||||
G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
|
||||
"Can't acquire or release permission");
|
||||
}
|
||||
|
||||
static gboolean
|
||||
acquire_or_release_finish (GPermission *permission,
|
||||
GAsyncResult *result,
|
||||
GError **error)
|
||||
{
|
||||
return g_task_propagate_boolean (G_TASK (result), error);
|
||||
}
|
||||
|
||||
static void
|
||||
g_permission_class_init (GPermissionClass *class)
|
||||
{
|
||||
GObjectClass *object_class = G_OBJECT_CLASS (class);
|
||||
|
||||
object_class->get_property = g_permission_get_property;
|
||||
|
||||
class->acquire = acquire_or_release;
|
||||
class->release = acquire_or_release;
|
||||
class->acquire_async = acquire_or_release_async;
|
||||
class->release_async = acquire_or_release_async;
|
||||
class->acquire_finish = acquire_or_release_finish;
|
||||
class->release_finish = acquire_or_release_finish;
|
||||
|
||||
/**
|
||||
* GPermission:allowed:
|
||||
*
|
||||
* %TRUE if the caller currently has permission to perform the action that
|
||||
* @permission represents the permission to perform.
|
||||
*/
|
||||
g_object_class_install_property (object_class, PROP_ALLOWED,
|
||||
g_param_spec_boolean ("allowed",
|
||||
P_("Is allowed"),
|
||||
P_("If the caller is allowed to perform the action"),
|
||||
FALSE,
|
||||
G_PARAM_STATIC_STRINGS | G_PARAM_READABLE));
|
||||
|
||||
/**
|
||||
* GPermission:can-acquire:
|
||||
*
|
||||
* %TRUE if it is generally possible to acquire the permission by calling
|
||||
* g_permission_acquire().
|
||||
*/
|
||||
g_object_class_install_property (object_class, PROP_CAN_ACQUIRE,
|
||||
g_param_spec_boolean ("can-acquire",
|
||||
P_("Can acquire"),
|
||||
P_("If calling g_permission_acquire() makes sense"),
|
||||
FALSE,
|
||||
G_PARAM_STATIC_STRINGS | G_PARAM_READABLE));
|
||||
|
||||
/**
|
||||
* GPermission:can-release:
|
||||
*
|
||||
* %TRUE if it is generally possible to release the permission by calling
|
||||
* g_permission_release().
|
||||
*/
|
||||
g_object_class_install_property (object_class, PROP_CAN_RELEASE,
|
||||
g_param_spec_boolean ("can-release",
|
||||
P_("Can release"),
|
||||
P_("If calling g_permission_release() makes sense"),
|
||||
FALSE,
|
||||
G_PARAM_STATIC_STRINGS | G_PARAM_READABLE));
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue