malcontent/malcontent-control/application.c

518 lines
19 KiB
C
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/* -*- 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);
}