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// SPDX-License-Identifier: Apache-2.0
/*
* Copyright (C) 2021 Collabora Ltd
* Copyright (C) 2022 Konsulko Group
*/
#include "app_info.h"
#include "app_launcher.h"
#include "systemd_manager.h"
typedef struct _AppLauncher {
applaunchdAppLaunchSkeleton parent;
SystemdManager *systemd_manager;
} AppLauncher;
static void app_launcher_iface_init(applaunchdAppLaunchIface *iface);
G_DEFINE_TYPE_WITH_CODE(AppLauncher, app_launcher,
APPLAUNCHD_TYPE_APP_LAUNCH_SKELETON,
G_IMPLEMENT_INTERFACE(APPLAUNCHD_TYPE_APP_LAUNCH,
app_launcher_iface_init));
static void app_launcher_started_cb(AppLauncher *self,
const gchar *app_id,
gpointer caller);
/*
* Internal functions
*/
/*
* Construct the application list to be sent over D-Bus. It has format "av", meaning
* the list itself is an array, each item being a variant consisting of 3 strings:
* - app-id
* - app name
* - icon path
*/
static GVariant *app_launcher_get_list_variant(AppLauncher *self)
{
GVariantBuilder builder;
GList *apps_list = systemd_manager_get_app_list(self->systemd_manager);
if (!apps_list)
return NULL;
guint len = g_list_length(apps_list);
/* Init array variant for storing the applications list */
g_variant_builder_init (&builder, G_VARIANT_TYPE_ARRAY);
for (guint i = 0; i < len; i++) {
GVariantBuilder app_builder;
AppInfo *app_info = g_list_nth_data(apps_list, i);
g_variant_builder_init (&app_builder, G_VARIANT_TYPE("(sss)"));
/* Create application entry */
g_variant_builder_add(&app_builder, "s", app_info_get_app_id(app_info));
g_variant_builder_add(&app_builder, "s", app_info_get_name(app_info));
g_variant_builder_add(&app_builder, "s", app_info_get_icon_path(app_info));
/* Add entry to apps list */
g_variant_builder_add(&builder, "v", g_variant_builder_end(&app_builder));
}
return g_variant_builder_end(&builder);
}
/*
* Starts the requested application using either the D-Bus activation manager
* or the process manager.
*/
gboolean app_launcher_start_app(AppLauncher *self, AppInfo *app_info)
{
g_return_val_if_fail(APPLAUNCHD_IS_APP_LAUNCHER(self), FALSE);
g_return_val_if_fail(APPLAUNCHD_IS_APP_INFO(app_info), FALSE);
return systemd_manager_start_app(self->systemd_manager, app_info);
}
/*
* Internal callbacks
*/
/*
* Handler for the "start" D-Bus method.
*/
static gboolean app_launcher_handle_start(applaunchdAppLaunch *object,
GDBusMethodInvocation *invocation,
const gchar *app_id)
{
AppInfo *app;
AppLauncher *self = APPLAUNCHD_APP_LAUNCHER(object);
g_return_val_if_fail(APPLAUNCHD_IS_APP_LAUNCHER(self), FALSE);
/* Search the apps list for the given app-id */
app = systemd_manager_get_app_info(self->systemd_manager, app_id);
if (!app) {
g_dbus_method_invocation_return_error(invocation, G_DBUS_ERROR,
G_DBUS_ERROR_INVALID_ARGS,
"Unknown application '%s'",
app_id);
return FALSE;
}
app_launcher_start_app(self, app);
applaunchd_app_launch_complete_start(object, invocation);
return TRUE;
}
/*
* Handler for the "listApplications" D-Bus method.
*/
static gboolean app_launcher_handle_list_applications(applaunchdAppLaunch *object,
GDBusMethodInvocation *invocation,
gboolean graphical)
{
GVariant *result = NULL;
AppLauncher *self = APPLAUNCHD_APP_LAUNCHER(object);
g_return_val_if_fail(APPLAUNCHD_IS_APP_LAUNCHER(self), FALSE);
/* Retrieve the applications list in the right format for sending over D-Bus */
result = app_launcher_get_list_variant(self);
if (result)
applaunchd_app_launch_complete_list_applications(object, invocation, result);
return TRUE;
}
/*
* Callback for the "started" signal emitted by both the
* process manager and D-Bus activation manager. Forwards
* the signal to other applications through D-Bus.
*/
static void app_launcher_started_cb(AppLauncher *self,
const gchar *app_id,
gpointer caller)
{
applaunchdAppLaunch *iface = APPLAUNCHD_APP_LAUNCH(self);
g_return_if_fail(APPLAUNCHD_IS_APP_LAUNCH(iface));
g_debug("Application '%s' started", app_id);
/*
* Emit the "started" D-Bus signal so subscribers get notified
* the application with ID "app_id" started and should be
* activated
*/
applaunchd_app_launch_emit_started(iface, app_id);
}
/*
* Callback for the "terminated" signal emitted by both the
* process manager and D-Bus activation manager. Forwards
* the signal to other applications through D-Bus.
*/
static void app_launcher_terminated_cb(AppLauncher *self,
const gchar *app_id,
gpointer caller)
{
applaunchdAppLaunch *iface = APPLAUNCHD_APP_LAUNCH(self);
g_return_if_fail(APPLAUNCHD_IS_APP_LAUNCH(iface));
g_debug("Application '%s' terminated", app_id);
/*
* Emit the "terminated" D-Bus signal so subscribers get
* notified the application with ID "app_id" terminated
*/
applaunchd_app_launch_emit_terminated(iface, app_id);
}
/*
* Initialization & cleanup functions
*/
static void app_launcher_dispose(GObject *object)
{
AppLauncher *self = APPLAUNCHD_APP_LAUNCHER(object);
g_clear_object(&self->systemd_manager);
G_OBJECT_CLASS(app_launcher_parent_class)->dispose(object);
}
static void app_launcher_finalize(GObject *object)
{
G_OBJECT_CLASS(app_launcher_parent_class)->finalize(object);
}
static void app_launcher_class_init(AppLauncherClass *klass)
{
GObjectClass *object_class = (GObjectClass *)klass;
object_class->dispose = app_launcher_dispose;
}
static void app_launcher_iface_init(applaunchdAppLaunchIface *iface)
{
iface->handle_start = app_launcher_handle_start;
iface->handle_list_applications = app_launcher_handle_list_applications;
}
static void app_launcher_init (AppLauncher *self)
{
/*
* Create the systemd manager and connect to its signals
* so we get notified on app startup/termination
*/
self->systemd_manager = systemd_manager_get_default();
systemd_manager_connect_callbacks(self->systemd_manager,
G_CALLBACK(app_launcher_started_cb),
G_CALLBACK(app_launcher_terminated_cb),
self);
}
/*
* Public functions
*/
AppLauncher *app_launcher_get_default(void)
{
static AppLauncher *launcher;
/*
* AppLauncher is a singleton, only create the object if it doesn't
* exist already.
*/
if (launcher == NULL) {
g_debug("Initializing app launcher service...");
launcher = g_object_new(APPLAUNCHD_TYPE_APP_LAUNCHER, NULL);
g_object_add_weak_pointer(G_OBJECT(launcher), (gpointer *)&launcher);
}
return launcher;
}
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