malcontent/malcontent-control/application.c

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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
*
* Copyright © 2019 Endless Mobile, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*
* Authors:
* - Philip Withnall <withnall@endlessm.com>
*/
#include "config.h"
#include <act/act.h>
#include <glib.h>
#include <glib-object.h>
#include <glib/gi18n-lib.h>
#include <gio/gio.h>
#include <gtk/gtk.h>
#include <libmalcontent-ui/malcontent-ui.h>
#include <polkit/polkit.h>
#include "application.h"
#include "user-selector.h"
static void user_selector_notify_user_cb (GObject *obj,
GParamSpec *pspec,
gpointer user_data);
static void user_manager_notify_is_loaded_cb (GObject *obj,
GParamSpec *pspec,
gpointer user_data);
static void permission_new_cb (GObject *source_object,
GAsyncResult *result,
gpointer user_data);
static void permission_notify_allowed_cb (GObject *obj,
GParamSpec *pspec,
gpointer user_data);
static void user_accounts_panel_button_clicked_cb (GtkButton *button,
gpointer user_data);
static void about_action_cb (GSimpleAction *action, GVariant *parameters, gpointer user_data);
static void help_action_cb (GSimpleAction *action, GVariant *parameters, gpointer user_data);
static void quit_action_cb (GSimpleAction *action, GVariant *parameters, gpointer user_data);
/**
* MctApplication:
*
* #MctApplication is a top-level object representing the parental controls
* application.
*
* Since: 0.5.0
*/
struct _MctApplication
{
GtkApplication parent_instance;
GCancellable *cancellable; /* (owned) */
GDBusConnection *dbus_connection; /* (owned) */
ActUserManager *user_manager; /* (owned) */
GPermission *permission; /* (owned) */
GError *permission_error; /* (nullable) (owned) */
MctUserSelector *user_selector;
MctUserControls *user_controls;
GtkStack *main_stack;
GtkLabel *error_title;
GtkLabel *error_message;
GtkLockButton *lock_button;
GtkButton *user_accounts_panel_button;
GtkLabel *help_label;
};
G_DEFINE_TYPE (MctApplication, mct_application, GTK_TYPE_APPLICATION)
static void
mct_application_init (MctApplication *self)
{
self->cancellable = g_cancellable_new ();
}
static void
mct_application_constructed (GObject *object)
{
GApplication *application = G_APPLICATION (object);
const GOptionEntry options[] =
{
{ "user", 'u', G_OPTION_FLAG_NONE, G_OPTION_ARG_STRING, NULL,
/* Translators: This documents the --user command line option to malcontent-control: */
N_("User to select in the UI"),
/* Translators: This is a placeholder for a command line argument value: */
N_("USERNAME") },
};
g_application_set_application_id (application, "org.freedesktop.MalcontentControl");
g_application_add_main_option_entries (application, options);
g_application_set_flags (application, g_application_get_flags (application) | G_APPLICATION_HANDLES_COMMAND_LINE);
/* Translators: This is a summary of what the application does, displayed when
* its run with --help: */
g_application_set_option_context_parameter_string (application,
N_("— view and edit parental controls"));
/* Localisation */
bindtextdomain ("malcontent", PACKAGE_LOCALE_DIR);
bind_textdomain_codeset ("malcontent", "UTF-8");
textdomain ("malcontent");
g_set_application_name (_("Parental Controls"));
gtk_window_set_default_icon_name ("org.freedesktop.MalcontentControl");
G_OBJECT_CLASS (mct_application_parent_class)->constructed (object);
}
static void
mct_application_dispose (GObject *object)
{
MctApplication *self = MCT_APPLICATION (object);
g_cancellable_cancel (self->cancellable);
if (self->user_manager != NULL)
{
g_signal_handlers_disconnect_by_func (self->user_manager,
user_manager_notify_is_loaded_cb, self);
g_clear_object (&self->user_manager);
}
if (self->permission != NULL)
{
g_signal_handlers_disconnect_by_func (self->permission,
permission_notify_allowed_cb, self);
g_clear_object (&self->permission);
}
g_clear_object (&self->dbus_connection);
g_clear_error (&self->permission_error);
g_clear_object (&self->cancellable);
G_OBJECT_CLASS (mct_application_parent_class)->dispose (object);
}
static GtkWindow *
mct_application_get_main_window (MctApplication *self)
{
return gtk_application_get_active_window (GTK_APPLICATION (self));
}
static void
mct_application_activate (GApplication *application)
{
MctApplication *self = MCT_APPLICATION (application);
GtkWindow *window = NULL;
window = mct_application_get_main_window (self);
if (window == NULL)
{
g_autoptr(GtkBuilder) builder = NULL;
g_autoptr(GError) local_error = NULL;
/* Ensure the types used in the UI are registered. */
g_type_ensure (MCT_TYPE_USER_CONTROLS);
g_type_ensure (MCT_TYPE_USER_SELECTOR);
/* Start loading the permission */
polkit_permission_new ("org.freedesktop.MalcontentControl.administration",
NULL, self->cancellable,
permission_new_cb, self);
builder = gtk_builder_new ();
g_assert (self->dbus_connection == NULL);
self->dbus_connection = g_bus_get_sync (G_BUS_TYPE_SYSTEM, self->cancellable, &local_error);
if (self->dbus_connection == NULL)
{
g_error ("Error getting system bus: %s", local_error->message);
return;
}
g_assert (self->user_manager == NULL);
self->user_manager = g_object_ref (act_user_manager_get_default ());
gtk_builder_set_translation_domain (builder, "malcontent");
gtk_builder_expose_object (builder, "user_manager", G_OBJECT (self->user_manager));
gtk_builder_expose_object (builder, "dbus_connection", G_OBJECT (self->dbus_connection));
gtk_builder_add_from_resource (builder, "/org/freedesktop/MalcontentControl/ui/main.ui", &local_error);
g_assert (local_error == NULL);
/* Set up the main window. */
window = GTK_WINDOW (gtk_builder_get_object (builder, "main_window"));
gtk_window_set_application (window, GTK_APPLICATION (application));
self->main_stack = GTK_STACK (gtk_builder_get_object (builder, "main_stack"));
self->user_selector = MCT_USER_SELECTOR (gtk_builder_get_object (builder, "user_selector"));
self->user_controls = MCT_USER_CONTROLS (gtk_builder_get_object (builder, "user_controls"));
self->error_title = GTK_LABEL (gtk_builder_get_object (builder, "error_title"));
self->error_message = GTK_LABEL (gtk_builder_get_object (builder, "error_message"));
self->lock_button = GTK_LOCK_BUTTON (gtk_builder_get_object (builder, "lock_button"));
self->user_accounts_panel_button = GTK_BUTTON (gtk_builder_get_object (builder, "user_accounts_panel_button"));
self->help_label = GTK_LABEL (gtk_builder_get_object (builder, "help_label"));
/* Connect signals. */
g_signal_connect_object (self->user_selector, "notify::user",
G_CALLBACK (user_selector_notify_user_cb),
self, 0 /* flags */);
g_signal_connect_object (self->user_accounts_panel_button, "clicked",
G_CALLBACK (user_accounts_panel_button_clicked_cb),
self, 0 /* flags */);
g_signal_connect (self->user_manager, "notify::is-loaded",
G_CALLBACK (user_manager_notify_is_loaded_cb), self);
/* Work out whether to show the loading page or the main page, and show
* the controls for the initially selected user. */
user_selector_notify_user_cb (G_OBJECT (self->user_selector), NULL, self);
user_manager_notify_is_loaded_cb (G_OBJECT (self->user_manager), NULL, self);
gtk_widget_show (GTK_WIDGET (window));
}
/* Bring the window to the front. */
gtk_window_present (window);
}
static void
mct_application_startup (GApplication *application)
{
const GActionEntry app_entries[] =
{
{ "about", about_action_cb, NULL, NULL, NULL, { 0, } },
{ "help", help_action_cb, NULL, NULL, NULL, { 0, } },
{ "quit", quit_action_cb, NULL, NULL, NULL, { 0, } },
};
/* Chain up. */
G_APPLICATION_CLASS (mct_application_parent_class)->startup (application);
g_action_map_add_action_entries (G_ACTION_MAP (application), app_entries,
G_N_ELEMENTS (app_entries), application);
gtk_application_set_accels_for_action (GTK_APPLICATION (application),
"app.help", (const gchar * const[]) { "F1", NULL });
gtk_application_set_accels_for_action (GTK_APPLICATION (application),
"app.quit", (const gchar * const[]) { "<Primary>q", "<Primary>w", NULL });
}
static gint
mct_application_command_line (GApplication *application,
GApplicationCommandLine *command_line)
{
MctApplication *self = MCT_APPLICATION (application);
GVariantDict *options = g_application_command_line_get_options_dict (command_line);
const gchar *username;
/* Show the application. */
g_application_activate (application);
/* Select a user if requested. */
if (g_variant_dict_lookup (options, "user", "&s", &username) &&
!mct_user_selector_select_user_by_username (self->user_selector, username))
g_warning ("Failed to select user %s", username);
return 0; /* exit status */
}
static void
mct_application_class_init (MctApplicationClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GApplicationClass *application_class = G_APPLICATION_CLASS (klass);
object_class->constructed = mct_application_constructed;
object_class->dispose = mct_application_dispose;
application_class->activate = mct_application_activate;
application_class->startup = mct_application_startup;
application_class->command_line = mct_application_command_line;
}
static void
about_action_cb (GSimpleAction *action, GVariant *parameters, gpointer user_data)
{
MctApplication *self = MCT_APPLICATION (user_data);
const gchar *authors[] =
{
"Philip Withnall <withnall@endlessm.com>",
"Georges Basile Stavracas Neto <georges@endlessm.com>",
"Andre Moreira Magalhaes <andre@endlessm.com>",
NULL
};
gtk_show_about_dialog (mct_application_get_main_window (self),
"version", VERSION,
"copyright", _("Copyright © 2019, 2020 Endless Mobile, Inc."),
"authors", authors,
/* Translators: this should be "translated" to the
names of people who have translated Malcontent into
this language, one per line. */
"translator-credits", _("translator-credits"),
"logo-icon-name", "org.freedesktop.MalcontentControl",
"license-type", GTK_LICENSE_GPL_2_0,
"wrap-license", TRUE,
/* Translators: "Malcontent" is the brand name of this
project, so should not be translated. */
"website-label", _("Malcontent Website"),
"website", "https://gitlab.freedesktop.org/pwithnall/malcontent",
NULL);
}
static void
help_action_cb (GSimpleAction *action, GVariant *parameters, gpointer user_data)
{
MctApplication *self = MCT_APPLICATION (user_data);
g_autoptr(GError) local_error = NULL;
if (!gtk_show_uri_on_window (mct_application_get_main_window (self), "help:malcontent",
gtk_get_current_event_time (), &local_error))
{
GtkWidget *dialog = gtk_message_dialog_new (mct_application_get_main_window (self),
GTK_DIALOG_MODAL,
GTK_MESSAGE_ERROR,
GTK_BUTTONS_OK,
_("The help contents could not be displayed"));
gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (dialog), "%s", local_error->message);
gtk_dialog_run (GTK_DIALOG (dialog));
gtk_widget_destroy (dialog);
}
}
static void
quit_action_cb (GSimpleAction *action, GVariant *parameters, gpointer user_data)
{
MctApplication *self = MCT_APPLICATION (user_data);
g_application_quit (G_APPLICATION (self));
}
static void
update_main_stack (MctApplication *self)
{
gboolean is_user_manager_loaded, is_permission_loaded, has_permission;
const gchar *new_page_name, *old_page_name;
GtkWidget *new_focus_widget;
ActUser *selected_user;
/* The implementation of #ActUserManager guarantees that once is-loaded is
* true, it is never reset to false. */
g_object_get (self->user_manager, "is-loaded", &is_user_manager_loaded, NULL);
is_permission_loaded = (self->permission != NULL || self->permission_error != NULL);
has_permission = (self->permission != NULL && g_permission_get_allowed (self->permission));
selected_user = mct_user_selector_get_user (self->user_selector);
/* Handle any loading errors (including those from getting the permission). */
if ((is_user_manager_loaded && act_user_manager_no_service (self->user_manager)) ||
self->permission_error != NULL)
{
gtk_label_set_label (self->error_title,
_("Failed to load user data from the system"));
gtk_label_set_label (self->error_message,
_("Please make sure that the AccountsService is installed and enabled."));
new_page_name = "error";
new_focus_widget = NULL;
}
else if (is_user_manager_loaded && selected_user == NULL)
{
new_page_name = "no-other-users";
new_focus_widget = GTK_WIDGET (self->user_accounts_panel_button);
}
else if (is_permission_loaded && !has_permission)
{
gtk_lock_button_set_permission (self->lock_button, self->permission);
mct_user_controls_set_permission (self->user_controls, self->permission);
new_page_name = "unlock";
new_focus_widget = GTK_WIDGET (self->lock_button);
}
else if (is_permission_loaded && is_user_manager_loaded)
{
g_autofree gchar *help_label = NULL;
/* Translators: Replace the link to commonsensemedia.org with some
* localised guidance for parents/carers on how to set restrictions on
* their child/caree in a responsible way which is in keeping with the
* best practice and culture of the region. If no suitable localised
* guidance exists, and if the default commonsensemedia.org link is not
* suitable, please file an issue against malcontent so we can discuss
* further!
* https://gitlab.freedesktop.org/pwithnall/malcontent/-/issues/new
*/
help_label = g_strdup_printf (_("Its recommended that restrictions are "
"set as part of an ongoing conversation "
"with %s. <a href='https://www.commonsensemedia.org/privacy-and-internet-safety'>"
"Read guidance</a> on what to consider."),
act_user_get_real_name (selected_user));
gtk_label_set_markup (self->help_label, help_label);
mct_user_controls_set_user (self->user_controls, selected_user);
new_page_name = "controls";
new_focus_widget = GTK_WIDGET (self->user_selector);
}
else
{
new_page_name = "loading";
new_focus_widget = NULL;
}
old_page_name = gtk_stack_get_visible_child_name (self->main_stack);
gtk_stack_set_visible_child_name (self->main_stack, new_page_name);
if (new_focus_widget != NULL && !g_str_equal (old_page_name, new_page_name))
gtk_widget_grab_focus (new_focus_widget);
}
static void
user_selector_notify_user_cb (GObject *obj,
GParamSpec *pspec,
gpointer user_data)
{
MctApplication *self = MCT_APPLICATION (user_data);
update_main_stack (self);
}
static void
user_manager_notify_is_loaded_cb (GObject *obj,
GParamSpec *pspec,
gpointer user_data)
{
MctApplication *self = MCT_APPLICATION (user_data);
update_main_stack (self);
}
static void
permission_new_cb (GObject *source_object,
GAsyncResult *result,
gpointer user_data)
{
MctApplication *self = MCT_APPLICATION (user_data);
g_autoptr(GPermission) permission = NULL;
g_autoptr(GError) local_error = NULL;
permission = polkit_permission_new_finish (result, &local_error);
if (permission == NULL)
{
g_assert (self->permission_error == NULL);
self->permission_error = g_steal_pointer (&local_error);
g_debug ("Error getting permission: %s", self->permission_error->message);
}
else
{
g_assert (self->permission == NULL);
self->permission = g_steal_pointer (&permission);
g_signal_connect (self->permission, "notify::allowed",
G_CALLBACK (permission_notify_allowed_cb), self);
}
/* Recalculate the UI. */
update_main_stack (self);
}
static void
permission_notify_allowed_cb (GObject *obj,
GParamSpec *pspec,
gpointer user_data)
{
MctApplication *self = MCT_APPLICATION (user_data);
update_main_stack (self);
}
static void
user_accounts_panel_button_clicked_cb (GtkButton *button,
gpointer user_data)
{
g_autoptr(GError) local_error = NULL;
if (!g_spawn_command_line_async ("gnome-control-center user-accounts", &local_error))
{
g_warning ("Error opening GNOME Control Center: %s",
local_error->message);
return;
}
}
/**
* mct_application_new:
*
* Create a new #MctApplication.
*
* Returns: (transfer full): a new #MctApplication
* Since: 0.5.0
*/
MctApplication *
mct_application_new (void)
{
return g_object_new (MCT_TYPE_APPLICATION, NULL);
}