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glib2.0/gio/gapplication.c

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/*
* Copyright © 2010 Codethink Limited
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* 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/>.
*
* Authors: Ryan Lortie <desrt@desrt.ca>
*/
/* Prologue {{{1 */
#include "config.h"
#include "gapplication.h"
#include "gapplicationcommandline.h"
#include "gsimpleactiongroup.h"
#include "gremoteactiongroup.h"
#include "gapplicationimpl.h"
#include "gactiongroup.h"
#include "gactionmap.h"
#include "gsettings.h"
#include "gnotification-private.h"
#include "gnotificationbackend.h"
#include "gdbusutils.h"
#include "gioenumtypes.h"
#include "gioenums.h"
#include "gfile.h"
#include "glib-private.h"
#include "glibintl.h"
#include "gmarshal-internal.h"
#include <string.h>
/**
* GApplication:
*
* `GApplication` is the core class for application support.
*
* A `GApplication` is the foundation of an application. It wraps some
* low-level platform-specific services and is intended to act as the
* foundation for higher-level application classes such as
* `GtkApplication` or `MxApplication`. In general, you should not use
* this class outside of a higher level framework.
*
* `GApplication` provides convenient life-cycle management by maintaining
* a "use count" for the primary application instance. The use count can
* be changed using [method@Gio.Application.hold] and
* [method@Gio.Application.release]. If it drops to zero, the application
* exits. Higher-level classes such as `GtkApplication` employ the use count
* to ensure that the application stays alive as long as it has any opened
* windows.
*
* Another feature that `GApplication` (optionally) provides is process
* uniqueness. Applications can make use of this functionality by
* providing a unique application ID. If given, only one application
* with this ID can be running at a time per session. The session
* concept is platform-dependent, but corresponds roughly to a graphical
* desktop login. When your application is launched again, its
* arguments are passed through platform communication to the already
* running program. The already running instance of the program is
* called the "primary instance"; for non-unique applications this is
* always the current instance. On Linux, the D-Bus session bus
* is used for communication.
*
* The use of `GApplication` differs from some other commonly-used
* uniqueness libraries (such as libunique) in important ways. The
* application is not expected to manually register itself and check
* if it is the primary instance. Instead, the main() function of a
* `GApplication` should do very little more than instantiating the
* application instance, possibly connecting signal handlers, then
* calling [method@Gio.Application.run]. All checks for uniqueness are done
* internally. If the application is the primary instance then the
* startup signal is emitted and the mainloop runs. If the application
* is not the primary instance then a signal is sent to the primary
* instance and [method@Gio.Application.run] promptly returns. See the code
* examples below.
*
* If used, the expected form of an application identifier is the
* same as that of a
* [D-Bus well-known bus name](https://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-names-bus).
* Examples include: `com.example.MyApp`, `org.example.internal_apps.Calculator`,
* `org._7_zip.Archiver`.
* For details on valid application identifiers, see [func@Gio.Application.id_is_valid].
*
* On Linux, the application identifier is claimed as a well-known bus name
* on the user's session bus. This means that the uniqueness of your
* application is scoped to the current session. It also means that your
* application may provide additional services (through registration of other
* object paths) at that bus name. The registration of these object paths
* should be done with the shared GDBus session bus. Note that due to the
* internal architecture of GDBus, method calls can be dispatched at any time
* (even if a main loop is not running). For this reason, you must ensure that
* any object paths that you wish to register are registered before #GApplication
* attempts to acquire the bus name of your application (which happens in
* [method@Gio.Application.register]). Unfortunately, this means that you cannot
* use [property@Gio.Application:is-remote] to decide if you want to register
* object paths.
*
* `GApplication` also implements the [iface@Gio.ActionGroup] and [iface@Gio.ActionMap]
* interfaces and lets you easily export actions by adding them with
* [method@Gio.ActionMap.add_action]. When invoking an action by calling
* [method@Gio.ActionGroup.activate_action] on the application, it is always
* invoked in the primary instance. The actions are also exported on
* the session bus, and GIO provides the [class@Gio.DBusActionGroup] wrapper to
* conveniently access them remotely. GIO provides a [class@Gio.DBusMenuModel] wrapper
* for remote access to exported [class@Gio.MenuModel]s.
*
* Note: Due to the fact that actions are exported on the session bus,
* using `maybe` parameters is not supported, since D-Bus does not support
* `maybe` types.
*
* There is a number of different entry points into a `GApplication`:
*
* - via 'Activate' (i.e. just starting the application)
*
* - via 'Open' (i.e. opening some files)
*
* - by handling a command-line
*
* - via activating an action
*
* The [signal@Gio.Application::startup] signal lets you handle the application
* initialization for all of these in a single place.
*
* Regardless of which of these entry points is used to start the
* application, `GApplication` passes some ‘platform data’ from the
* launching instance to the primary instance, in the form of a
* [struct@GLib.Variant] dictionary mapping strings to variants. To use platform
* data, override the [vfunc@Gio.Application.before_emit] or
* [vfunc@Gio.Application.after_emit] virtual functions
* in your `GApplication` subclass. When dealing with
* [class@Gio.ApplicationCommandLine] objects, the platform data is
* directly available via [method@Gio.ApplicationCommandLine.get_cwd],
* [method@Gio.ApplicationCommandLine.get_environ] and
* [method@Gio.ApplicationCommandLine.get_platform_data].
*
* As the name indicates, the platform data may vary depending on the
* operating system, but it always includes the current directory (key
* `cwd`), and optionally the environment (ie the set of environment
* variables and their values) of the calling process (key `environ`).
* The environment is only added to the platform data if the
* `G_APPLICATION_SEND_ENVIRONMENT` flag is set. `GApplication` subclasses
* can add their own platform data by overriding the
* [vfunc@Gio.Application.add_platform_data] virtual function. For instance,
* `GtkApplication` adds startup notification data in this way.
*
* To parse commandline arguments you may handle the
* [signal@Gio.Application::command-line] signal or override the
* [vfunc@Gio.Application.local_command_line] virtual funcion, to parse them in
* either the primary instance or the local instance, respectively.
*
* For an example of opening files with a `GApplication`, see
* [gapplication-example-open.c](https://gitlab.gnome.org/GNOME/glib/-/blob/HEAD/gio/tests/gapplication-example-open.c).
*
* For an example of using actions with `GApplication`, see
* [gapplication-example-actions.c](https://gitlab.gnome.org/GNOME/glib/-/blob/HEAD/gio/tests/gapplication-example-actions.c).
*
* For an example of using extra D-Bus hooks with `GApplication`, see
* [gapplication-example-dbushooks.c](https://gitlab.gnome.org/GNOME/glib/-/blob/HEAD/gio/tests/gapplication-example-dbushooks.c).
*
* Since: 2.28
*/
/**
* GApplicationClass:
* @startup: invoked on the primary instance immediately after registration
* @shutdown: invoked only on the registered primary instance immediately
* after the main loop terminates
* @activate: invoked on the primary instance when an activation occurs
* @open: invoked on the primary instance when there are files to open
* @command_line: invoked on the primary instance when a command-line is
* not handled locally
* @local_command_line: invoked (locally). The virtual function has the chance
* to inspect (and possibly replace) command line arguments. See
* g_application_run() for more information. Also see the
* #GApplication::handle-local-options signal, which is a simpler
* alternative to handling some commandline options locally
* @before_emit: invoked on the primary instance before 'activate', 'open',
* 'command-line' or any action invocation, gets the 'platform data' from
* the calling instance
* @after_emit: invoked on the primary instance after 'activate', 'open',
* 'command-line' or any action invocation, gets the 'platform data' from
* the calling instance
* @add_platform_data: invoked (locally) to add 'platform data' to be sent to
* the primary instance when activating, opening or invoking actions
* @quit_mainloop: Used to be invoked on the primary instance when the use
* count of the application drops to zero (and after any inactivity
* timeout, if requested). Not used anymore since 2.32
* @run_mainloop: Used to be invoked on the primary instance from
* g_application_run() if the use-count is non-zero. Since 2.32,
* GApplication is iterating the main context directly and is not
* using @run_mainloop anymore
* @dbus_register: invoked locally during registration, if the application is
* using its D-Bus backend. You can use this to export extra objects on the
* bus, that need to exist before the application tries to own the bus name.
* The function is passed the #GDBusConnection to to session bus, and the
* object path that #GApplication will use to export its D-Bus API.
* If this function returns %TRUE, registration will proceed; otherwise
* registration will abort. Since: 2.34
* @dbus_unregister: invoked locally during unregistration, if the application
* is using its D-Bus backend. Use this to undo anything done by
* the @dbus_register vfunc. Since: 2.34
* @handle_local_options: invoked locally after the parsing of the commandline
* options has occurred. Since: 2.40
* @name_lost: invoked when another instance is taking over the name. Since: 2.60
*
* Virtual function table for #GApplication.
*
* Since: 2.28
*/
struct _GApplicationPrivate
{
GApplicationFlags flags;
gchar *id;
gchar *version;
gchar *resource_path;
GActionGroup *actions;
guint inactivity_timeout_id;
guint inactivity_timeout;
guint use_count;
guint busy_count;
guint is_registered : 1;
guint is_remote : 1;
guint did_startup : 1;
guint did_shutdown : 1;
guint must_quit_now : 1;
GRemoteActionGroup *remote_actions;
GApplicationImpl *impl;
GNotificationBackend *notifications;
/* GOptionContext support */
GOptionGroup *main_options;
GSList *option_groups;
GHashTable *packed_options;
gboolean options_parsed;
gchar *parameter_string;
gchar *summary;
gchar *description;
/* Allocated option strings, from g_application_add_main_option() */
GSList *option_strings;
};
enum
{
PROP_NONE,
PROP_APPLICATION_ID,
PROP_VERSION,
PROP_FLAGS,
PROP_RESOURCE_BASE_PATH,
PROP_IS_REGISTERED,
PROP_IS_REMOTE,
PROP_INACTIVITY_TIMEOUT,
PROP_ACTION_GROUP,
PROP_IS_BUSY
};
enum
{
SIGNAL_STARTUP,
SIGNAL_SHUTDOWN,
SIGNAL_ACTIVATE,
SIGNAL_OPEN,
SIGNAL_ACTION,
SIGNAL_COMMAND_LINE,
SIGNAL_HANDLE_LOCAL_OPTIONS,
SIGNAL_NAME_LOST,
NR_SIGNALS
};
static guint g_application_signals[NR_SIGNALS];
static void g_application_action_group_iface_init (GActionGroupInterface *);
static void g_application_action_map_iface_init (GActionMapInterface *);
G_DEFINE_TYPE_WITH_CODE (GApplication, g_application, G_TYPE_OBJECT,
G_ADD_PRIVATE (GApplication)
G_IMPLEMENT_INTERFACE (G_TYPE_ACTION_GROUP, g_application_action_group_iface_init)
G_IMPLEMENT_INTERFACE (G_TYPE_ACTION_MAP, g_application_action_map_iface_init))
/* GApplicationExportedActions {{{1 */
/* We create a subclass of GSimpleActionGroup that implements
* GRemoteActionGroup and deals with the platform data using
* GApplication's before/after_emit vfuncs. This is the action group we
* will be exporting.
*
* We could implement GRemoteActionGroup on GApplication directly, but
* this would be potentially extremely confusing to have exposed as part
* of the public API of GApplication. We certainly don't want anyone in
* the same process to be calling these APIs...
*/
typedef GSimpleActionGroupClass GApplicationExportedActionsClass;
typedef struct
{
GSimpleActionGroup parent_instance;
GApplication *application;
} GApplicationExportedActions;
static GType g_application_exported_actions_get_type (void);
static void g_application_exported_actions_iface_init (GRemoteActionGroupInterface *iface);
G_DEFINE_TYPE_WITH_CODE (GApplicationExportedActions, g_application_exported_actions, G_TYPE_SIMPLE_ACTION_GROUP,
G_IMPLEMENT_INTERFACE (G_TYPE_REMOTE_ACTION_GROUP, g_application_exported_actions_iface_init))
static void
g_application_exported_actions_activate_action_full (GRemoteActionGroup *remote,
const gchar *action_name,
GVariant *parameter,
GVariant *platform_data)
{
GApplicationExportedActions *exported = (GApplicationExportedActions *) remote;
G_APPLICATION_GET_CLASS (exported->application)
->before_emit (exported->application, platform_data);
g_action_group_activate_action (G_ACTION_GROUP (exported), action_name, parameter);
G_APPLICATION_GET_CLASS (exported->application)
->after_emit (exported->application, platform_data);
}
static void
g_application_exported_actions_change_action_state_full (GRemoteActionGroup *remote,
const gchar *action_name,
GVariant *value,
GVariant *platform_data)
{
GApplicationExportedActions *exported = (GApplicationExportedActions *) remote;
G_APPLICATION_GET_CLASS (exported->application)
->before_emit (exported->application, platform_data);
g_action_group_change_action_state (G_ACTION_GROUP (exported), action_name, value);
G_APPLICATION_GET_CLASS (exported->application)
->after_emit (exported->application, platform_data);
}
static void
g_application_exported_actions_init (GApplicationExportedActions *actions)
{
}
static void
g_application_exported_actions_iface_init (GRemoteActionGroupInterface *iface)
{
iface->activate_action_full = g_application_exported_actions_activate_action_full;
iface->change_action_state_full = g_application_exported_actions_change_action_state_full;
}
static void
g_application_exported_actions_class_init (GApplicationExportedActionsClass *class)
{
}
static GActionGroup *
g_application_exported_actions_new (GApplication *application)
{
GApplicationExportedActions *actions;
actions = g_object_new (g_application_exported_actions_get_type (), NULL);
actions->application = application;
return G_ACTION_GROUP (actions);
}
/* Command line option handling {{{1 */
static void
free_option_entry (gpointer data)
{
GOptionEntry *entry = data;
switch (entry->arg)
{
case G_OPTION_ARG_STRING:
case G_OPTION_ARG_FILENAME:
g_free (*(gchar **) entry->arg_data);
break;
case G_OPTION_ARG_STRING_ARRAY:
case G_OPTION_ARG_FILENAME_ARRAY:
g_strfreev (*(gchar ***) entry->arg_data);
break;
default:
/* most things require no free... */
break;
}
/* ...except for the space that we allocated for it ourselves */
g_free (entry->arg_data);
g_slice_free (GOptionEntry, entry);
}
static void
g_application_pack_option_entries (GApplication *application,
GVariantDict *dict)
{
GHashTableIter iter;
gpointer item;
g_hash_table_iter_init (&iter, application->priv->packed_options);
while (g_hash_table_iter_next (&iter, NULL, &item))
{
GOptionEntry *entry = item;
GVariant *value = NULL;
switch (entry->arg)
{
case G_OPTION_ARG_NONE:
if (*(gboolean *) entry->arg_data != 2)
value = g_variant_new_boolean (*(gboolean *) entry->arg_data);
break;
case G_OPTION_ARG_STRING:
if (*(gchar **) entry->arg_data)
value = g_variant_new_string (*(gchar **) entry->arg_data);
break;
case G_OPTION_ARG_INT:
if (*(gint32 *) entry->arg_data)
value = g_variant_new_int32 (*(gint32 *) entry->arg_data);
break;
case G_OPTION_ARG_FILENAME:
if (*(gchar **) entry->arg_data)
value = g_variant_new_bytestring (*(gchar **) entry->arg_data);
break;
case G_OPTION_ARG_STRING_ARRAY:
if (*(gchar ***) entry->arg_data)
value = g_variant_new_strv (*(const gchar ***) entry->arg_data, -1);
break;
case G_OPTION_ARG_FILENAME_ARRAY:
if (*(gchar ***) entry->arg_data)
value = g_variant_new_bytestring_array (*(const gchar ***) entry->arg_data, -1);
break;
case G_OPTION_ARG_DOUBLE:
if (*(gdouble *) entry->arg_data)
value = g_variant_new_double (*(gdouble *) entry->arg_data);
break;
case G_OPTION_ARG_INT64:
if (*(gint64 *) entry->arg_data)
value = g_variant_new_int64 (*(gint64 *) entry->arg_data);
break;
default:
g_assert_not_reached ();
}
if (value)
g_variant_dict_insert_value (dict, entry->long_name, value);
}
}
static GVariantDict *
g_application_parse_command_line (GApplication *application,
gchar ***arguments,
gboolean *print_version,
GError **error)
{
gboolean become_service = FALSE;
gchar *app_id = NULL;
gboolean replace = FALSE;
gboolean version = FALSE;
GVariantDict *dict = NULL;
GOptionContext *context;
GOptionGroup *gapplication_group;
/* Due to the memory management of GOptionGroup we can only parse
* options once. That's because once you add a group to the
* GOptionContext there is no way to get it back again. This is fine:
* local_command_line() should never get invoked more than once
* anyway. Add a sanity check just to be sure.
*/
g_return_val_if_fail (!application->priv->options_parsed, NULL);
context = g_option_context_new (application->priv->parameter_string);
g_option_context_set_summary (context, application->priv->summary);
g_option_context_set_description (context, application->priv->description);
gapplication_group = g_option_group_new ("gapplication",
_("GApplication Options:"), _("Show GApplication options"),
NULL, NULL);
g_option_group_set_translation_domain (gapplication_group, GETTEXT_PACKAGE);
g_option_context_add_group (context, gapplication_group);
/* If the application has not registered local options and it has
* G_APPLICATION_HANDLES_COMMAND_LINE then we have to assume that
* their primary instance commandline handler may want to deal with
* the arguments. We must therefore ignore them.
*
* We must also ignore --help in this case since some applications
* will try to handle this from the remote side. See #737869.
*/
if (application->priv->main_options == NULL && (application->priv->flags & G_APPLICATION_HANDLES_COMMAND_LINE))
{
g_option_context_set_ignore_unknown_options (context, TRUE);
g_option_context_set_help_enabled (context, FALSE);
}
/* Add the main option group, if it exists */
if (application->priv->main_options)
{
/* This consumes the main_options */
g_option_context_set_main_group (context, application->priv->main_options);
application->priv->main_options = NULL;
}
/* Add any other option groups if they exist. Adding them to the
* context will consume them, so we free the list as we go...
*/
while (application->priv->option_groups)
{
g_option_context_add_group (context, application->priv->option_groups->data);
application->priv->option_groups = g_slist_delete_link (application->priv->option_groups,
application->priv->option_groups);
}
/* In the case that we are not explicitly marked as a service or a
* launcher then we want to add the "--gapplication-service" option to
* allow the process to be made into a service.
*/
if ((application->priv->flags & (G_APPLICATION_IS_SERVICE | G_APPLICATION_IS_LAUNCHER)) == 0)
{
GOptionEntry entries[] = {
{ "gapplication-service", '\0', 0, G_OPTION_ARG_NONE, &become_service,
N_("Enter GApplication service mode (use from D-Bus service files)"), NULL },
G_OPTION_ENTRY_NULL
};
g_option_group_add_entries (gapplication_group, entries);
}
/* Allow overriding the ID if the application allows it */
if (application->priv->flags & G_APPLICATION_CAN_OVERRIDE_APP_ID)
{
GOptionEntry entries[] = {
{ "gapplication-app-id", '\0', 0, G_OPTION_ARG_STRING, &app_id,
N_("Override the application’s ID"), NULL },
G_OPTION_ENTRY_NULL
};
g_option_group_add_entries (gapplication_group, entries);
}
if (application->priv->version)
{
GOptionEntry entries[] = {
{ "version", '\0', 0, G_OPTION_ARG_NONE, &version,
N_("Print the application version"), NULL },
G_OPTION_ENTRY_NULL
};
g_option_group_add_entries (gapplication_group, entries);
}
/* Allow replacing if the application allows it */
if (application->priv->flags & G_APPLICATION_ALLOW_REPLACEMENT)
{
GOptionEntry entries[] = {
{ "gapplication-replace", '\0', 0, G_OPTION_ARG_NONE, &replace,
N_("Replace the running instance"), NULL },
G_OPTION_ENTRY_NULL
};
g_option_group_add_entries (gapplication_group, entries);
}
/* Now we parse... */
if (!g_option_context_parse_strv (context, arguments, error))
goto out;
*print_version = version;
/* Check for --gapplication-service */
if (become_service)
application->priv->flags |= G_APPLICATION_IS_SERVICE;
/* Check for --gapplication-app-id */
if (app_id)
g_application_set_application_id (application, app_id);
/* Check for --gapplication-replace */
if (replace)
application->priv->flags |= G_APPLICATION_REPLACE;
dict = g_variant_dict_new (NULL);
if (application->priv->packed_options)
{
g_application_pack_option_entries (application, dict);
g_hash_table_unref (application->priv->packed_options);
application->priv->packed_options = NULL;
}
out:
/* Make sure we don't run again */
application->priv->options_parsed = TRUE;
g_option_context_free (context);
g_free (app_id);
return dict;
}
static void
add_packed_option (GApplication *application,
GOptionEntry *entry)
{
switch (entry->arg)
{
case G_OPTION_ARG_NONE:
entry->arg_data = g_new (gboolean, 1);
*(gboolean *) entry->arg_data = 2;
break;
case G_OPTION_ARG_INT:
entry->arg_data = g_new0 (gint, 1);
break;
case G_OPTION_ARG_STRING:
case G_OPTION_ARG_FILENAME:
case G_OPTION_ARG_STRING_ARRAY:
case G_OPTION_ARG_FILENAME_ARRAY:
entry->arg_data = g_new0 (gpointer, 1);
break;
case G_OPTION_ARG_INT64:
entry->arg_data = g_new0 (gint64, 1);
break;
case G_OPTION_ARG_DOUBLE:
entry->arg_data = g_new0 (gdouble, 1);
break;
default:
g_return_if_reached ();
}
if (!application->priv->packed_options)
application->priv->packed_options = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, free_option_entry);
g_hash_table_insert (application->priv->packed_options,
g_strdup (entry->long_name),
g_slice_dup (GOptionEntry, entry));
}
/**
* g_application_add_main_option_entries:
* @application: a #GApplication
* @entries: (array zero-terminated=1) (element-type GOptionEntry): the
* main options for the application
*
* Adds main option entries to be handled by @application.
*
* This function is comparable to g_option_context_add_main_entries().
*
* After the commandline arguments are parsed, the
* #GApplication::handle-local-options signal will be emitted. At this
* point, the application can inspect the values pointed to by @arg_data
* in the given #GOptionEntrys.
*
* Unlike #GOptionContext, #GApplication supports giving a %NULL
* @arg_data for a non-callback #GOptionEntry. This results in the
* argument in question being packed into a #GVariantDict which is also
* passed to #GApplication::handle-local-options, where it can be
* inspected and modified. If %G_APPLICATION_HANDLES_COMMAND_LINE is
* set, then the resulting dictionary is sent to the primary instance,
* where g_application_command_line_get_options_dict() will return it.
* As it has been passed outside the process at this point, the types of all
* values in the options dict must be checked before being used.
* This "packing" is done according to the type of the argument --
* booleans for normal flags, strings for strings, bytestrings for
* filenames, etc. The packing only occurs if the flag is given (ie: we
* do not pack a "false" #GVariant in the case that a flag is missing).
*
* In general, it is recommended that all commandline arguments are
* parsed locally. The options dictionary should then be used to
* transmit the result of the parsing to the primary instance, where
* g_variant_dict_lookup() can be used. For local options, it is
* possible to either use @arg_data in the usual way, or to consult (and
* potentially remove) the option from the options dictionary.
*
* This function is new in GLib 2.40. Before then, the only real choice
* was to send all of the commandline arguments (options and all) to the
* primary instance for handling. #GApplication ignored them completely
* on the local side. Calling this function "opts in" to the new
* behaviour, and in particular, means that unrecognised options will be
* treated as errors. Unrecognised options have never been ignored when
* %G_APPLICATION_HANDLES_COMMAND_LINE is unset.
*
* If #GApplication::handle-local-options needs to see the list of
* filenames, then the use of %G_OPTION_REMAINING is recommended. If
* @arg_data is %NULL then %G_OPTION_REMAINING can be used as a key into
* the options dictionary. If you do use %G_OPTION_REMAINING then you
* need to handle these arguments for yourself because once they are
* consumed, they will no longer be visible to the default handling
* (which treats them as filenames to be opened).
*
* It is important to use the proper GVariant format when retrieving
* the options with g_variant_dict_lookup():
* - for %G_OPTION_ARG_NONE, use `b`
* - for %G_OPTION_ARG_STRING, use `&s`
* - for %G_OPTION_ARG_INT, use `i`
* - for %G_OPTION_ARG_INT64, use `x`
* - for %G_OPTION_ARG_DOUBLE, use `d`
* - for %G_OPTION_ARG_FILENAME, use `^&ay`
* - for %G_OPTION_ARG_STRING_ARRAY, use `^a&s`
* - for %G_OPTION_ARG_FILENAME_ARRAY, use `^a&ay`
*
* Since: 2.40
*/
void
g_application_add_main_option_entries (GApplication *application,
const GOptionEntry *entries)
{
gint i;
g_return_if_fail (G_IS_APPLICATION (application));
g_return_if_fail (entries != NULL);
if (!application->priv->main_options)
{
application->priv->main_options = g_option_group_new (NULL, NULL, NULL, NULL, NULL);
g_option_group_set_translation_domain (application->priv->main_options, NULL);
}
for (i = 0; entries[i].long_name; i++)
{
GOptionEntry my_entries[2] =
{
G_OPTION_ENTRY_NULL,
G_OPTION_ENTRY_NULL
};
my_entries[0] = entries[i];
if (!my_entries[0].arg_data)
add_packed_option (application, &my_entries[0]);
g_option_group_add_entries (application->priv->main_options, my_entries);
}
}
/**
* g_application_add_main_option:
* @application: the #GApplication
* @long_name: the long name of an option used to specify it in a commandline
* @short_name: the short name of an option
* @flags: flags from #GOptionFlags
* @arg: the type of the option, as a #GOptionArg
* @description: the description for the option in `--help` output
* @arg_description: (nullable): the placeholder to use for the extra argument
* parsed by the option in `--help` output
*
* Add an option to be handled by @application.
*
* Calling this function is the equivalent of calling
* g_application_add_main_option_entries() with a single #GOptionEntry
* that has its arg_data member set to %NULL.
*
* The parsed arguments will be packed into a #GVariantDict which
* is passed to #GApplication::handle-local-options. If
* %G_APPLICATION_HANDLES_COMMAND_LINE is set, then it will also
* be sent to the primary instance. See
* g_application_add_main_option_entries() for more details.
*
* See #GOptionEntry for more documentation of the arguments.
*
* Since: 2.42
**/
void
g_application_add_main_option (GApplication *application,
const char *long_name,
char short_name,
GOptionFlags flags,
GOptionArg arg,
const char *description,
const char *arg_description)
{
gchar *dup_string;
GOptionEntry my_entry[2] = {
{ NULL, short_name, flags, arg, NULL, NULL, NULL },
G_OPTION_ENTRY_NULL
};
g_return_if_fail (G_IS_APPLICATION (application));
g_return_if_fail (long_name != NULL);
g_return_if_fail (description != NULL);
my_entry[0].long_name = dup_string = g_strdup (long_name);
application->priv->option_strings = g_slist_prepend (application->priv->option_strings, dup_string);
my_entry[0].description = dup_string = g_strdup (description);
application->priv->option_strings = g_slist_prepend (application->priv->option_strings, dup_string);
my_entry[0].arg_description = dup_string = g_strdup (arg_description);
application->priv->option_strings = g_slist_prepend (application->priv->option_strings, dup_string);
g_application_add_main_option_entries (application, my_entry);
}
/**
* g_application_add_option_group:
* @application: the #GApplication
* @group: (transfer full): a #GOptionGroup
*
* Adds a #GOptionGroup to the commandline handling of @application.
*
* This function is comparable to g_option_context_add_group().
*
* Unlike g_application_add_main_option_entries(), this function does
* not deal with %NULL @arg_data and never transmits options to the
* primary instance.
*
* The reason for that is because, by the time the options arrive at the
* primary instance, it is typically too late to do anything with them.
* Taking the GTK option group as an example: GTK will already have been
* initialised by the time the #GApplication::command-line handler runs.
* In the case that this is not the first-running instance of the
* application, the existing instance may already have been running for
* a very long time.
*
* This means that the options from #GOptionGroup are only really usable
* in the case that the instance of the application being run is the
* first instance. Passing options like `--display=` or `--gdk-debug=`
* on future runs will have no effect on the existing primary instance.
*
* Calling this function will cause the options in the supplied option
* group to be parsed, but it does not cause you to be "opted in" to the
* new functionality whereby unrecognised options are rejected even if
* %G_APPLICATION_HANDLES_COMMAND_LINE was given.
*
* Since: 2.40
**/
void
g_application_add_option_group (GApplication *application,
GOptionGroup *group)
{
g_return_if_fail (G_IS_APPLICATION (application));
g_return_if_fail (group != NULL);
application->priv->option_groups = g_slist_prepend (application->priv->option_groups, group);
}
/**
* g_application_set_option_context_parameter_string:
* @application: the #GApplication
* @parameter_string: (nullable): a string which is displayed
* in the first line of `--help` output, after the usage summary `programname [OPTION...]`.
*
* Sets the parameter string to be used by the commandline handling of @application.
*
* This function registers the argument to be passed to g_option_context_new()
* when the internal #GOptionContext of @application is created.
*
* See g_option_context_new() for more information about @parameter_string.
*
* Since: 2.56
*/
void
g_application_set_option_context_parameter_string (GApplication *application,
const gchar *parameter_string)
{
g_return_if_fail (G_IS_APPLICATION (application));
g_free (application->priv->parameter_string);
application->priv->parameter_string = g_strdup (parameter_string);
}
/**
* g_application_set_option_context_summary:
* @application: the #GApplication
* @summary: (nullable): a string to be shown in `--help` output
* before the list of options, or %NULL
*
* Adds a summary to the @application option context.
*
* See g_option_context_set_summary() for more information.
*
* Since: 2.56
*/
void
g_application_set_option_context_summary (GApplication *application,
const gchar *summary)
{
g_return_if_fail (G_IS_APPLICATION (application));
g_free (application->priv->summary);
application->priv->summary = g_strdup (summary);
}
/**
* g_application_set_option_context_description:
* @application: the #GApplication
* @description: (nullable): a string to be shown in `--help` output
* after the list of options, or %NULL
*
* Adds a description to the @application option context.
*
* See g_option_context_set_description() for more information.
*
* Since: 2.56
*/
void
g_application_set_option_context_description (GApplication *application,
const gchar *description)
{
g_return_if_fail (G_IS_APPLICATION (application));
g_free (application->priv->description);
application->priv->description = g_strdup (description);
}
/* vfunc defaults {{{1 */
static void
g_application_real_before_emit (GApplication *application,
GVariant *platform_data)
{
}
static void
g_application_real_after_emit (GApplication *application,
GVariant *platform_data)
{
}
static void
g_application_real_startup (GApplication *application)
{
application->priv->did_startup = TRUE;
}
static void
g_application_real_shutdown (GApplication *application)
{
application->priv->did_shutdown = TRUE;
}
static void
g_application_real_activate (GApplication *application)
{
if (!g_signal_has_handler_pending (application,
g_application_signals[SIGNAL_ACTIVATE],
0, TRUE) &&
G_APPLICATION_GET_CLASS (application)->activate == g_application_real_activate)
{
static gboolean warned;
if (warned)
return;
g_warning ("Your application does not implement "
"g_application_activate() and has no handlers connected "
"to the 'activate' signal. It should do one of these.");
warned = TRUE;
}
}
static void
g_application_real_open (GApplication *application,
GFile **files,
gint n_files,
const gchar *hint)
{
if (!g_signal_has_handler_pending (application,
g_application_signals[SIGNAL_OPEN],
0, TRUE) &&
G_APPLICATION_GET_CLASS (application)->open == g_application_real_open)
{
static gboolean warned;
if (warned)
return;
g_warning ("Your application claims to support opening files "
"but does not implement g_application_open() and has no "
"handlers connected to the 'open' signal.");
warned = TRUE;
}
}
static int
g_application_real_command_line (GApplication *application,
GApplicationCommandLine *cmdline)
{
if (!g_signal_has_handler_pending (application,
g_application_signals[SIGNAL_COMMAND_LINE],
0, TRUE) &&
G_APPLICATION_GET_CLASS (application)->command_line == g_application_real_command_line)
{
static gboolean warned;
if (warned)
return 1;
g_warning ("Your application claims to support custom command line "
"handling but does not implement g_application_command_line() "
"and has no handlers connected to the 'command-line' signal.");
warned = TRUE;
}
return 1;
}
static gint
g_application_real_handle_local_options (GApplication *application,
GVariantDict *options)
{
return -1;
}
static GVariant *
get_platform_data (GApplication *application,
GVariant *options)
{
GVariantBuilder *builder;
GVariant *result;
builder = g_variant_builder_new (G_VARIANT_TYPE ("a{sv}"));
{
gchar *cwd = g_get_current_dir ();
g_variant_builder_add (builder, "{sv}", "cwd",
g_variant_new_bytestring (cwd));
g_free (cwd);
}
if (application->priv->flags & G_APPLICATION_SEND_ENVIRONMENT)
{
GVariant *array;
gchar **envp;
envp = g_get_environ ();
array = g_variant_new_bytestring_array ((const gchar **) envp, -1);
g_strfreev (envp);
g_variant_builder_add (builder, "{sv}", "environ", array);
}
if (options)
g_variant_builder_add (builder, "{sv}", "options", options);
G_APPLICATION_GET_CLASS (application)->
add_platform_data (application, builder);
result = g_variant_builder_end (builder);
g_variant_builder_unref (builder);
return result;
}
static void
g_application_call_command_line (GApplication *application,
const gchar * const *arguments,
GVariant *options,
gint *exit_status)
{
if (application->priv->is_remote)
{
GVariant *platform_data;
platform_data = get_platform_data (application, options);
*exit_status = g_application_impl_command_line (application->priv->impl, arguments, platform_data);
}
else
{
GApplicationCommandLine *cmdline;
GVariant *v;
gint handler_exit_status;
v = g_variant_new_bytestring_array ((const gchar **) arguments, -1);
cmdline = g_object_new (G_TYPE_APPLICATION_COMMAND_LINE,
"arguments", v,
"options", options,
NULL);
g_signal_emit (application, g_application_signals[SIGNAL_COMMAND_LINE], 0, cmdline, &handler_exit_status);
/* For consistency with remote invocations */
g_application_command_line_set_exit_status (cmdline, handler_exit_status);
*exit_status = g_application_command_line_get_exit_status (cmdline);
g_object_unref (cmdline);
}
}
static gboolean
g_application_real_local_command_line (GApplication *application,
gchar ***arguments,
int *exit_status)
{
GError *error = NULL;
GVariantDict *options;
gint n_args;
gboolean print_version = FALSE;
options = g_application_parse_command_line (application, arguments, &print_version, &error);
if (!options)
{
g_printerr ("%s\n", error->message);
g_error_free (error);
*exit_status = 1;
return TRUE;
}
/* Exit quickly with --version? */
if (print_version)
{
const char *prgname = g_get_prgname ();
g_assert (application->priv->version != NULL);
if (prgname != NULL)
g_print ("%s %s\n", prgname, application->priv->version);
else
g_print ("%s\n", application->priv->version);
*exit_status = EXIT_SUCCESS;
return TRUE;
}
g_signal_emit (application, g_application_signals[SIGNAL_HANDLE_LOCAL_OPTIONS], 0, options, exit_status);
if (*exit_status >= 0)
{
g_variant_dict_unref (options);
return TRUE;
}
if (!g_application_register (application, NULL, &error))
{
g_printerr ("Failed to register: %s\n", error->message);
g_variant_dict_unref (options);
g_error_free (error);
*exit_status = 1;
return TRUE;
}
n_args = g_strv_length (*arguments);
if (application->priv->flags & G_APPLICATION_IS_SERVICE)
{
if ((*exit_status = n_args > 1))
{
g_printerr ("GApplication service mode takes no arguments.\n");
application->priv->flags &= ~G_APPLICATION_IS_SERVICE;
*exit_status = 1;
}
else
*exit_status = 0;
}
else if (application->priv->flags & G_APPLICATION_HANDLES_COMMAND_LINE)
{
g_application_call_command_line (application,
(const gchar **) *arguments,
g_variant_dict_end (options),
exit_status);
}
else
{
if (n_args <= 1)
{
g_application_activate (application);
*exit_status = 0;
}
else
{
if (~application->priv->flags & G_APPLICATION_HANDLES_OPEN)
{
g_critical ("This application can not open files.");
*exit_status = 1;
}
else
{
GFile **files;
gint n_files;
gint i;
n_files = n_args - 1;
files = g_new (GFile *, n_files);
for (i = 0; i < n_files; i++)
files[i] = g_file_new_for_commandline_arg ((*arguments)[i + 1]);
g_application_open (application, files, n_files, "");
for (i = 0; i < n_files; i++)
g_object_unref (files[i]);
g_free (files);
*exit_status = 0;
}
}
}
g_variant_dict_unref (options);
return TRUE;
}
static void
g_application_real_add_platform_data (GApplication *application,
GVariantBuilder *builder)
{
}
static gboolean
g_application_real_dbus_register (GApplication *application,
GDBusConnection *connection,
const gchar *object_path,
GError **error)
{
return TRUE;
}
static void
g_application_real_dbus_unregister (GApplication *application,
GDBusConnection *connection,
const gchar *object_path)
{
}
static gboolean
g_application_real_name_lost (GApplication *application)
{
g_application_quit (application);
return TRUE;
}
/* GObject implementation stuff {{{1 */
static void
g_application_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GApplication *application = G_APPLICATION (object);
switch (prop_id)
{
case PROP_APPLICATION_ID:
g_application_set_application_id (application,
g_value_get_string (value));
break;
case PROP_VERSION:
g_application_set_version (application, g_value_get_string (value));
break;
case PROP_FLAGS:
g_application_set_flags (application, g_value_get_flags (value));
break;
case PROP_RESOURCE_BASE_PATH:
g_application_set_resource_base_path (application, g_value_get_string (value));
break;
case PROP_INACTIVITY_TIMEOUT:
g_application_set_inactivity_timeout (application,
g_value_get_uint (value));
break;
case PROP_ACTION_GROUP:
g_clear_object (&application->priv->actions);
application->priv->actions = g_value_dup_object (value);
break;
default:
g_assert_not_reached ();
}
}
/**
* g_application_set_action_group:
* @application: a #GApplication
* @action_group: (nullable): a #GActionGroup, or %NULL
*
* This used to be how actions were associated with a #GApplication.
* Now there is #GActionMap for that.
*
* Since: 2.28
*
* Deprecated:2.32:Use the #GActionMap interface instead. Never ever
* mix use of this API with use of #GActionMap on the same @application
* or things will go very badly wrong. This function is known to
* introduce buggy behaviour (ie: signals not emitted on changes to the
* action group), so you should really use #GActionMap instead.
**/
void
g_application_set_action_group (GApplication *application,
GActionGroup *action_group)
{
g_return_if_fail (G_IS_APPLICATION (application));
g_return_if_fail (!application->priv->is_registered);
if (application->priv->actions != NULL)
g_object_unref (application->priv->actions);
application->priv->actions = action_group;
if (application->priv->actions != NULL)
g_object_ref (application->priv->actions);
}
static void
g_application_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GApplication *application = G_APPLICATION (object);
switch (prop_id)
{
case PROP_APPLICATION_ID:
g_value_set_string (value,
g_application_get_application_id (application));
break;
case PROP_VERSION:
g_value_set_string (value,
g_application_get_version (application));
break;
case PROP_FLAGS:
g_value_set_flags (value,
g_application_get_flags (application));
break;
case PROP_RESOURCE_BASE_PATH:
g_value_set_string (value, g_application_get_resource_base_path (application));
break;
case PROP_IS_REGISTERED:
g_value_set_boolean (value,
g_application_get_is_registered (application));
break;
case PROP_IS_REMOTE:
g_value_set_boolean (value,
g_application_get_is_remote (application));
break;
case PROP_INACTIVITY_TIMEOUT:
g_value_set_uint (value,
g_application_get_inactivity_timeout (application));
break;
case PROP_IS_BUSY:
g_value_set_boolean (value, g_application_get_is_busy (application));
break;
default:
g_assert_not_reached ();
}
}
static void
g_application_constructed (GObject *object)
{
GApplication *application = G_APPLICATION (object);
if (g_application_get_default () == NULL)
g_application_set_default (application);
/* People should not set properties from _init... */
g_assert (application->priv->resource_path == NULL);
if (application->priv->id != NULL)
{
gint i;
application->priv->resource_path = g_strconcat ("/", application->priv->id, NULL);
for (i = 1; application->priv->resource_path[i]; i++)
if (application->priv->resource_path[i] == '.')
application->priv->resource_path[i] = '/';
}
}
static void
g_application_dispose (GObject *object)
{
GApplication *application = G_APPLICATION (object);
if (application->priv->impl != NULL &&
G_APPLICATION_GET_CLASS (application)->dbus_unregister != g_application_real_dbus_unregister)
{
static gboolean warned;
if (!warned)
{
g_warning ("Your application did not unregister from D-Bus before destruction. "
"Consider using g_application_run().");
}
warned = TRUE;
}
G_OBJECT_CLASS (g_application_parent_class)->dispose (object);
}
static void
g_application_finalize (GObject *object)
{
GApplication *application = G_APPLICATION (object);
if (application->priv->inactivity_timeout_id)
g_source_remove (application->priv->inactivity_timeout_id);
g_slist_free_full (application->priv->option_groups, (GDestroyNotify) g_option_group_unref);
if (application->priv->main_options)
g_option_group_unref (application->priv->main_options);
if (application->priv->packed_options)
g_hash_table_unref (application->priv->packed_options);
g_free (application->priv->parameter_string);
g_free (application->priv->summary);
g_free (application->priv->description);
g_free (application->priv->version);
g_slist_free_full (application->priv->option_strings, g_free);
if (application->priv->impl)
g_application_impl_destroy (application->priv->impl);
g_free (application->priv->id);
if (g_application_get_default () == application)
g_application_set_default (NULL);
if (application->priv->actions)
g_object_unref (application->priv->actions);
g_clear_object (&application->priv->remote_actions);
if (application->priv->notifications)
g_object_unref (application->priv->notifications);
g_free (application->priv->resource_path);
G_OBJECT_CLASS (g_application_parent_class)
->finalize (object);
}
static void
g_application_init (GApplication *application)
{
application->priv = g_application_get_instance_private (application);
application->priv->actions = g_application_exported_actions_new (application);
/* application->priv->actions is the one and only ref on the group, so when
* we dispose, the action group will die, disconnecting all signals.
*/
g_signal_connect_swapped (application->priv->actions, "action-added",
G_CALLBACK (g_action_group_action_added), application);
g_signal_connect_swapped (application->priv->actions, "action-enabled-changed",
G_CALLBACK (g_action_group_action_enabled_changed), application);
g_signal_connect_swapped (application->priv->actions, "action-state-changed",
G_CALLBACK (g_action_group_action_state_changed), application);
g_signal_connect_swapped (application->priv->actions, "action-removed",
G_CALLBACK (g_action_group_action_removed), application);
}
static gboolean
g_application_handle_local_options_accumulator (GSignalInvocationHint *ihint,
GValue *return_accu,
const GValue *handler_return,
gpointer dummy)
{
gint value;
value = g_value_get_int (handler_return);
g_value_set_int (return_accu, value);
return value < 0;
}
static void
g_application_class_init (GApplicationClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
object_class->constructed = g_application_constructed;
object_class->dispose = g_application_dispose;
object_class->finalize = g_application_finalize;
object_class->get_property = g_application_get_property;
object_class->set_property = g_application_set_property;
class->before_emit = g_application_real_before_emit;
class->after_emit = g_application_real_after_emit;
class->startup = g_application_real_startup;
class->shutdown = g_application_real_shutdown;
class->activate = g_application_real_activate;
class->open = g_application_real_open;
class->command_line = g_application_real_command_line;
class->local_command_line = g_application_real_local_command_line;
class->handle_local_options = g_application_real_handle_local_options;
class->add_platform_data = g_application_real_add_platform_data;
class->dbus_register = g_application_real_dbus_register;
class->dbus_unregister = g_application_real_dbus_unregister;
class->name_lost = g_application_real_name_lost;
/**
* GApplication:application-id:
*
* The unique identifier for the application.
*
* Since: 2.28
*/
g_object_class_install_property (object_class, PROP_APPLICATION_ID,
g_param_spec_string ("application-id", NULL, NULL,
NULL, G_PARAM_READWRITE | G_PARAM_CONSTRUCT |
G_PARAM_STATIC_STRINGS));
/**
* GApplication:version:
*
* The human-readable version number of the application.
*
* Since: 2.80
*/
g_object_class_install_property (object_class, PROP_VERSION,
g_param_spec_string ("version", NULL, NULL,
NULL, G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS | G_PARAM_EXPLICIT_NOTIFY));
/**
* GApplication:flags:
*
* Flags specifying the behaviour of the application.
*
* Since: 2.28
*/
g_object_class_install_property (object_class, PROP_FLAGS,
g_param_spec_flags ("flags", NULL, NULL,
G_TYPE_APPLICATION_FLAGS, G_APPLICATION_DEFAULT_FLAGS,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GApplication:resource-base-path:
*
* The base resource path for the application.
*
* Since: 2.28
*/
g_object_class_install_property (object_class, PROP_RESOURCE_BASE_PATH,
g_param_spec_string ("resource-base-path", NULL, NULL,
NULL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GApplication:is-registered:
*
* Whether [method@Gio.Application.register] has been called.
*
* Since: 2.28
*/
g_object_class_install_property (object_class, PROP_IS_REGISTERED,
g_param_spec_boolean ("is-registered", NULL, NULL,
FALSE, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
/**
* GApplication:is-remote:
*
* Whether this application instance is remote.
*
* Since: 2.28
*/
g_object_class_install_property (object_class, PROP_IS_REMOTE,
g_param_spec_boolean ("is-remote", NULL, NULL,
FALSE, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
/**
* GApplication:inactivity-timeout:
*
* Time (in milliseconds) to stay alive after becoming idle.
*
* Since: 2.28
*/
g_object_class_install_property (object_class, PROP_INACTIVITY_TIMEOUT,
g_param_spec_uint ("inactivity-timeout", NULL, NULL,
0, G_MAXUINT, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GApplication:action-group:
*
* The group of actions that the application exports.
*
* Since: 2.28
*/
g_object_class_install_property (object_class, PROP_ACTION_GROUP,
g_param_spec_object ("action-group", NULL, NULL,
G_TYPE_ACTION_GROUP,
G_PARAM_DEPRECATED | G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
/**
* GApplication:is-busy:
*
* Whether the application is currently marked as busy through
* g_application_mark_busy() or g_application_bind_busy_property().
*
* Since: 2.44
*/
g_object_class_install_property (object_class, PROP_IS_BUSY,
g_param_spec_boolean ("is-busy", NULL, NULL,
FALSE, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
/**
* GApplication::startup:
* @application: the application
*
* The ::startup signal is emitted on the primary instance immediately
* after registration. See g_application_register().
*/
g_application_signals[SIGNAL_STARTUP] =
g_signal_new (I_("startup"), G_TYPE_APPLICATION, G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GApplicationClass, startup),
NULL, NULL, NULL, G_TYPE_NONE, 0);
/**
* GApplication::shutdown:
* @application: the application
*
* The ::shutdown signal is emitted only on the registered primary instance
* immediately after the main loop terminates.
*/
g_application_signals[SIGNAL_SHUTDOWN] =
g_signal_new (I_("shutdown"), G_TYPE_APPLICATION, G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GApplicationClass, shutdown),
NULL, NULL, NULL, G_TYPE_NONE, 0);
/**
* GApplication::activate:
* @application: the application
*
* The ::activate signal is emitted on the primary instance when an
* activation occurs. See g_application_activate().
*/
g_application_signals[SIGNAL_ACTIVATE] =
g_signal_new (I_("activate"), G_TYPE_APPLICATION, G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GApplicationClass, activate),
NULL, NULL, NULL, G_TYPE_NONE, 0);
/**
* GApplication::open:
* @application: the application
* @files: (array length=n_files) (element-type GFile): an array of #GFiles
* @n_files: the length of @files
* @hint: a hint provided by the calling instance
*
* The ::open signal is emitted on the primary instance when there are
* files to open. See g_application_open() for more information.
*/
g_application_signals[SIGNAL_OPEN] =
g_signal_new (I_("open"), G_TYPE_APPLICATION, G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GApplicationClass, open),
NULL, NULL,
_g_cclosure_marshal_VOID__POINTER_INT_STRING,
G_TYPE_NONE, 3, G_TYPE_POINTER, G_TYPE_INT, G_TYPE_STRING);
g_signal_set_va_marshaller (g_application_signals[SIGNAL_OPEN],
G_TYPE_FROM_CLASS (class),
_g_cclosure_marshal_VOID__POINTER_INT_STRINGv);
/**
* GApplication::command-line:
* @application: the application
* @command_line: a #GApplicationCommandLine representing the
* passed commandline
*
* The ::command-line signal is emitted on the primary instance when
* a commandline is not handled locally. See g_application_run() and
* the #GApplicationCommandLine documentation for more information.
*
* Returns: An integer that is set as the exit status for the calling
* process. See g_application_command_line_set_exit_status().
*/
g_application_signals[SIGNAL_COMMAND_LINE] =
g_signal_new (I_("command-line"), G_TYPE_APPLICATION, G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GApplicationClass, command_line),
g_signal_accumulator_first_wins, NULL,
_g_cclosure_marshal_INT__OBJECT,
G_TYPE_INT, 1, G_TYPE_APPLICATION_COMMAND_LINE);
g_signal_set_va_marshaller (g_application_signals[SIGNAL_COMMAND_LINE],
G_TYPE_FROM_CLASS (class),
_g_cclosure_marshal_INT__OBJECTv);
/**
* GApplication::handle-local-options:
* @application: the application
* @options: the options dictionary
*
* The ::handle-local-options signal is emitted on the local instance
* after the parsing of the commandline options has occurred.
*
* You can add options to be recognised during commandline option
* parsing using g_application_add_main_option_entries() and
* g_application_add_option_group().
*
* Signal handlers can inspect @options (along with values pointed to
* from the @arg_data of an installed #GOptionEntrys) in order to
* decide to perform certain actions, including direct local handling
* (which may be useful for options like --version).
*
* In the event that the application is marked
* %G_APPLICATION_HANDLES_COMMAND_LINE the "normal processing" will
* send the @options dictionary to the primary instance where it can be
* read with g_application_command_line_get_options_dict(). The signal
* handler can modify the dictionary before returning, and the
* modified dictionary will be sent.
*
* In the event that %G_APPLICATION_HANDLES_COMMAND_LINE is not set,
* "normal processing" will treat the remaining uncollected command
* line arguments as filenames or URIs. If there are no arguments,
* the application is activated by g_application_activate(). One or
* more arguments results in a call to g_application_open().
*
* If you want to handle the local commandline arguments for yourself
* by converting them to calls to g_application_open() or
* g_action_group_activate_action() then you must be sure to register
* the application first. You should probably not call
* g_application_activate() for yourself, however: just return -1 and
* allow the default handler to do it for you. This will ensure that
* the `--gapplication-service` switch works properly (i.e. no activation
* in that case).
*
* Note that this signal is emitted from the default implementation of
* local_command_line(). If you override that function and don't
* chain up then this signal will never be emitted.
*
* You can override local_command_line() if you need more powerful
* capabilities than what is provided here, but this should not
* normally be required.
*
* Returns: an exit code. If you have handled your options and want
* to exit the process, return a non-negative option, 0 for success,
* and a positive value for failure. To continue, return -1 to let
* the default option processing continue.
*
* Since: 2.40
**/
g_application_signals[SIGNAL_HANDLE_LOCAL_OPTIONS] =
g_signal_new (I_("handle-local-options"), G_TYPE_APPLICATION, G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GApplicationClass, handle_local_options),
g_application_handle_local_options_accumulator, NULL,
_g_cclosure_marshal_INT__BOXED,
G_TYPE_INT, 1, G_TYPE_VARIANT_DICT);
g_signal_set_va_marshaller (g_application_signals[SIGNAL_HANDLE_LOCAL_OPTIONS],
G_TYPE_FROM_CLASS (class),
_g_cclosure_marshal_INT__BOXEDv);
/**
* GApplication::name-lost:
* @application: the application
*
* The ::name-lost signal is emitted only on the registered primary instance
* when a new instance has taken over. This can only happen if the application
* is using the %G_APPLICATION_ALLOW_REPLACEMENT flag.
*
* The default handler for this signal calls g_application_quit().
*
* Returns: %TRUE if the signal has been handled
*
* Since: 2.60
*/
g_application_signals[SIGNAL_NAME_LOST] =
g_signal_new (I_("name-lost"), G_TYPE_APPLICATION, G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GApplicationClass, name_lost),
g_signal_accumulator_true_handled, NULL,
_g_cclosure_marshal_BOOLEAN__VOID,
G_TYPE_BOOLEAN, 0);
g_signal_set_va_marshaller (g_application_signals[SIGNAL_NAME_LOST],
G_TYPE_FROM_CLASS (class),
_g_cclosure_marshal_BOOLEAN__VOIDv);
}
/* Application ID validity {{{1 */
/**
* g_application_id_is_valid:
* @application_id: a potential application identifier
*
* Checks if @application_id is a valid application identifier.
*
* A valid ID is required for calls to g_application_new() and
* g_application_set_application_id().
*
* Application identifiers follow the same format as
* [D-Bus well-known bus names](https://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-names-bus).
* For convenience, the restrictions on application identifiers are
* reproduced here:
*
* - Application identifiers are composed of 1 or more elements separated by a
* period (`.`) character. All elements must contain at least one character.
*
* - Each element must only contain the ASCII characters `[A-Z][a-z][0-9]_-`,
* with `-` discouraged in new application identifiers. Each element must not
* begin with a digit.
*
* - Application identifiers must contain at least one `.` (period) character
* (and thus at least two elements).
*
* - Application identifiers must not begin with a `.` (period) character.
*
* - Application identifiers must not exceed 255 characters.
*
* Note that the hyphen (`-`) character is allowed in application identifiers,
* but is problematic or not allowed in various specifications and APIs that
* refer to D-Bus, such as
* [Flatpak application IDs](http://docs.flatpak.org/en/latest/introduction.html#identifiers),
* the
* [`DBusActivatable` interface in the Desktop Entry Specification](https://specifications.freedesktop.org/desktop-entry-spec/desktop-entry-spec-latest.html#dbus),
* and the convention that an application's "main" interface and object path
* resemble its application identifier and bus name. To avoid situations that
* require special-case handling, it is recommended that new application
* identifiers consistently replace hyphens with underscores.
*
* Like D-Bus interface names, application identifiers should start with the
* reversed DNS domain name of the author of the interface (in lower-case), and
* it is conventional for the rest of the application identifier to consist of
* words run together, with initial capital letters.
*
* As with D-Bus interface names, if the author's DNS domain name contains
* hyphen/minus characters they should be replaced by underscores, and if it
* contains leading digits they should be escaped by prepending an underscore.
* For example, if the owner of 7-zip.org used an application identifier for an
* archiving application, it might be named `org._7_zip.Archiver`.
*
* Returns: %TRUE if @application_id is valid
*/
gboolean
g_application_id_is_valid (const gchar *application_id)
{
return g_dbus_is_name (application_id) &&
!g_dbus_is_unique_name (application_id);
}
/* Public Constructor {{{1 */
/**
* g_application_new:
* @application_id: (nullable): the application id
* @flags: the application flags
*
* Creates a new #GApplication instance.
*
* If non-%NULL, the application id must be valid. See
* g_application_id_is_valid().
*
* If no application ID is given then some features of #GApplication
* (most notably application uniqueness) will be disabled.
*
* Returns: a new #GApplication instance
**/
GApplication *
g_application_new (const gchar *application_id,
GApplicationFlags flags)
{
g_return_val_if_fail (application_id == NULL || g_application_id_is_valid (application_id), NULL);
return g_object_new (G_TYPE_APPLICATION,
"application-id", application_id,
"flags", flags,
NULL);
}
/* Simple get/set: application id, flags, inactivity timeout {{{1 */
/**
* g_application_get_application_id:
* @application: a #GApplication
*
* Gets the unique identifier for @application.
*
* Returns: (nullable): the identifier for @application, owned by @application
*
* Since: 2.28
**/
const gchar *
g_application_get_application_id (GApplication *application)
{
g_return_val_if_fail (G_IS_APPLICATION (application), NULL);
return application->priv->id;
}
/**
* g_application_set_application_id:
* @application: a #GApplication
* @application_id: (nullable): the identifier for @application
*
* Sets the unique identifier for @application.
*
* The application id can only be modified if @application has not yet
* been registered.
*
* If non-%NULL, the application id must be valid. See
* g_application_id_is_valid().
*
* Since: 2.28
**/
void
g_application_set_application_id (GApplication *application,
const gchar *application_id)
{
g_return_if_fail (G_IS_APPLICATION (application));
if (g_strcmp0 (application->priv->id, application_id) != 0)
{
g_return_if_fail (application_id == NULL || g_application_id_is_valid (application_id));
g_return_if_fail (!application->priv->is_registered);
g_free (application->priv->id);
application->priv->id = g_strdup (application_id);
g_object_notify (G_OBJECT (application), "application-id");
}
}
/**
* g_application_get_version:
* @application: a #GApplication
*
* Gets the version of @application.
*
* Returns: (nullable): the version of @application
*
* Since: 2.80
**/
const gchar *
g_application_get_version (GApplication *application)
{
g_return_val_if_fail (G_IS_APPLICATION (application), NULL);
return application->priv->version;
}
/**
* g_application_set_version
* @application: a #GApplication
* @version: the version of @application
*
* Sets the version number of @application. This will be used to implement
* a `--version` command line argument
*
* The application version can only be modified if @application has not yet
* been registered.
*
* Since: 2.80
**/
void
g_application_set_version (GApplication *application,
const gchar *version)
{
g_return_if_fail (G_IS_APPLICATION (application));
g_return_if_fail (version != NULL);
g_return_if_fail (!application->priv->is_registered);
if (g_set_str (&application->priv->version, version))
g_object_notify (G_OBJECT (application), "version");
}
/**
* g_application_get_flags:
* @application: a #GApplication
*
* Gets the flags for @application.
*
* See #GApplicationFlags.
*
* Returns: the flags for @application
*
* Since: 2.28
**/
GApplicationFlags
g_application_get_flags (GApplication *application)
{
g_return_val_if_fail (G_IS_APPLICATION (application), 0);
return application->priv->flags;
}
/**
* g_application_set_flags:
* @application: a #GApplication
* @flags: the flags for @application
*
* Sets the flags for @application.
*
* The flags can only be modified if @application has not yet been
* registered.
*
* See #GApplicationFlags.
*
* Since: 2.28
**/
void
g_application_set_flags (GApplication *application,
GApplicationFlags flags)
{
g_return_if_fail (G_IS_APPLICATION (application));
if (application->priv->flags != flags)
{
g_return_if_fail (!application->priv->is_registered);
application->priv->flags = flags;
g_object_notify (G_OBJECT (application), "flags");
}
}
/**
* g_application_get_resource_base_path:
* @application: a #GApplication
*
* Gets the resource base path of @application.
*
* See g_application_set_resource_base_path() for more information.
*
* Returns: (nullable): the base resource path, if one is set
*
* Since: 2.42
*/
const gchar *
g_application_get_resource_base_path (GApplication *application)
{
g_return_val_if_fail (G_IS_APPLICATION (application), NULL);
return application->priv->resource_path;
}
/**
* g_application_set_resource_base_path:
* @application: a #GApplication
* @resource_path: (nullable): the resource path to use
*
* Sets (or unsets) the base resource path of @application.
*
* The path is used to automatically load various [application
* resources][gresource] such as menu layouts and action descriptions.
* The various types of resources will be found at fixed names relative
* to the given base path.
*
* By default, the resource base path is determined from the application
* ID by prefixing '/' and replacing each '.' with '/'. This is done at
* the time that the #GApplication object is constructed. Changes to
* the application ID after that point will not have an impact on the
* resource base path.
*
* As an example, if the application has an ID of "org.example.app" then
* the default resource base path will be "/org/example/app". If this
* is a #GtkApplication (and you have not manually changed the path)
* then Gtk will then search for the menus of the application at
* "/org/example/app/gtk/menus.ui".
*
* See #GResource for more information about adding resources to your
* application.
*
* You can disable automatic resource loading functionality by setting
* the path to %NULL.
*
* Changing the resource base path once the application is running is
* not recommended. The point at which the resource path is consulted
* for forming paths for various purposes is unspecified. When writing
* a sub-class of #GApplication you should either set the
* #GApplication:resource-base-path property at construction time, or call
* this function during the instance initialization. Alternatively, you
* can call this function in the #GApplicationClass.startup virtual function,
* before chaining up to the parent implementation.
*
* Since: 2.42
*/
void
g_application_set_resource_base_path (GApplication *application,
const gchar *resource_path)
{
g_return_if_fail (G_IS_APPLICATION (application));
g_return_if_fail (resource_path == NULL || g_str_has_prefix (resource_path, "/"));
if (g_strcmp0 (application->priv->resource_path, resource_path) != 0)
{
g_free (application->priv->resource_path);
application->priv->resource_path = g_strdup (resource_path);
g_object_notify (G_OBJECT (application), "resource-base-path");
}
}
/**
* g_application_get_inactivity_timeout:
* @application: a #GApplication
*
* Gets the current inactivity timeout for the application.
*
* This is the amount of time (in milliseconds) after the last call to
* g_application_release() before the application stops running.
*
* Returns: the timeout, in milliseconds
*
* Since: 2.28
**/
guint
g_application_get_inactivity_timeout (GApplication *application)
{
g_return_val_if_fail (G_IS_APPLICATION (application), 0);
return application->priv->inactivity_timeout;
}
/**
* g_application_set_inactivity_timeout:
* @application: a #GApplication
* @inactivity_timeout: the timeout, in milliseconds
*
* Sets the current inactivity timeout for the application.
*
* This is the amount of time (in milliseconds) after the last call to
* g_application_release() before the application stops running.
*
* This call has no side effects of its own. The value set here is only
* used for next time g_application_release() drops the use count to
* zero. Any timeouts currently in progress are not impacted.
*
* Since: 2.28
**/
void
g_application_set_inactivity_timeout (GApplication *application,
guint inactivity_timeout)
{
g_return_if_fail (G_IS_APPLICATION (application));
if (application->priv->inactivity_timeout != inactivity_timeout)
{
application->priv->inactivity_timeout = inactivity_timeout;
g_object_notify (G_OBJECT (application), "inactivity-timeout");
}
}
/* Read-only property getters (is registered, is remote, dbus stuff) {{{1 */
/**
* g_application_get_is_registered:
* @application: a #GApplication
*
* Checks if @application is registered.
*
* An application is registered if g_application_register() has been
* successfully called.
*
* Returns: %TRUE if @application is registered
*
* Since: 2.28
**/
gboolean
g_application_get_is_registered (GApplication *application)
{
g_return_val_if_fail (G_IS_APPLICATION (application), FALSE);
return application->priv->is_registered;
}
/**
* g_application_get_is_remote:
* @application: a #GApplication
*
* Checks if @application is remote.
*
* If @application is remote then it means that another instance of
* application already exists (the 'primary' instance). Calls to
* perform actions on @application will result in the actions being
* performed by the primary instance.
*
* The value of this property cannot be accessed before
* g_application_register() has been called. See
* g_application_get_is_registered().
*
* Returns: %TRUE if @application is remote
*
* Since: 2.28
**/
gboolean
g_application_get_is_remote (GApplication *application)
{
g_return_val_if_fail (G_IS_APPLICATION (application), FALSE);
g_return_val_if_fail (application->priv->is_registered, FALSE);
return application->priv->is_remote;
}
/**
* g_application_get_dbus_connection:
* @application: a #GApplication
*
* Gets the #GDBusConnection being used by the application, or %NULL.
*
* If #GApplication is using its D-Bus backend then this function will
* return the #GDBusConnection being used for uniqueness and
* communication with the desktop environment and other instances of the
* application.
*
* If #GApplication is not using D-Bus then this function will return
* %NULL. This includes the situation where the D-Bus backend would
* normally be in use but we were unable to connect to the bus.
*
* This function must not be called before the application has been
* registered. See g_application_get_is_registered().
*
* Returns: (nullable) (transfer none): a #GDBusConnection, or %NULL
*
* Since: 2.34
**/
GDBusConnection *
g_application_get_dbus_connection (GApplication *application)
{
g_return_val_if_fail (G_IS_APPLICATION (application), FALSE);
g_return_val_if_fail (application->priv->is_registered, FALSE);
return g_application_impl_get_dbus_connection (application->priv->impl);
}
/**
* g_application_get_dbus_object_path:
* @application: a #GApplication
*
* Gets the D-Bus object path being used by the application, or %NULL.
*
* If #GApplication is using its D-Bus backend then this function will
* return the D-Bus object path that #GApplication is using. If the
* application is the primary instance then there is an object published
* at this path. If the application is not the primary instance then
* the result of this function is undefined.
*
* If #GApplication is not using D-Bus then this function will return
* %NULL. This includes the situation where the D-Bus backend would
* normally be in use but we were unable to connect to the bus.
*
* This function must not be called before the application has been
* registered. See g_application_get_is_registered().
*
* Returns: (nullable): the object path, or %NULL
*
* Since: 2.34
**/
const gchar *
g_application_get_dbus_object_path (GApplication *application)
{
g_return_val_if_fail (G_IS_APPLICATION (application), FALSE);
g_return_val_if_fail (application->priv->is_registered, FALSE);
return g_application_impl_get_dbus_object_path (application->priv->impl);
}
/* Register {{{1 */
/**
* g_application_register:
* @application: a #GApplication
* @cancellable: (nullable): a #GCancellable, or %NULL
* @error: a pointer to a NULL #GError, or %NULL
*
* Attempts registration of the application.
*
* This is the point at which the application discovers if it is the
* primary instance or merely acting as a remote for an already-existing
* primary instance. This is implemented by attempting to acquire the
* application identifier as a unique bus name on the session bus using
* GDBus.
*
* If there is no application ID or if %G_APPLICATION_NON_UNIQUE was
* given, then this process will always become the primary instance.
*
* Due to the internal architecture of GDBus, method calls can be
* dispatched at any time (even if a main loop is not running). For
* this reason, you must ensure that any object paths that you wish to
* register are registered before calling this function.
*
* If the application has already been registered then %TRUE is
* returned with no work performed.
*
* The #GApplication::startup signal is emitted if registration succeeds
* and @application is the primary instance (including the non-unique
* case).
*
* In the event of an error (such as @cancellable being cancelled, or a
* failure to connect to the session bus), %FALSE is returned and @error
* is set appropriately.
*
* Note: the return value of this function is not an indicator that this
* instance is or is not the primary instance of the application. See
* g_application_get_is_remote() for that.
*
* Returns: %TRUE if registration succeeded
*
* Since: 2.28
**/
gboolean
g_application_register (GApplication *application,
GCancellable *cancellable,
GError **error)
{
g_return_val_if_fail (G_IS_APPLICATION (application), FALSE);
if (!application->priv->is_registered)
{
if (application->priv->id == NULL)
application->priv->flags |= G_APPLICATION_NON_UNIQUE;
application->priv->impl =
g_application_impl_register (application, application->priv->id,
application->priv->flags,
application->priv->actions,
&application->priv->remote_actions,
cancellable, error);
if (application->priv->impl == NULL)
return FALSE;
application->priv->is_remote = application->priv->remote_actions != NULL;
application->priv->is_registered = TRUE;
g_object_notify (G_OBJECT (application), "is-registered");
if (!application->priv->is_remote)
{
g_signal_emit (application, g_application_signals[SIGNAL_STARTUP], 0);
if (!application->priv->did_startup)
g_critical ("GApplication subclass '%s' failed to chain up on"
" ::startup (from start of override function)",
G_OBJECT_TYPE_NAME (application));
}
}
return TRUE;
}
/* Hold/release {{{1 */
/**
* g_application_hold:
* @application: a #GApplication
*
* Increases the use count of @application.
*
* Use this function to indicate that the application has a reason to
* continue to run. For example, g_application_hold() is called by GTK
* when a toplevel window is on the screen.
*
* To cancel the hold, call g_application_release().
**/
void
g_application_hold (GApplication *application)
{
g_return_if_fail (G_IS_APPLICATION (application));
if (application->priv->inactivity_timeout_id)
{
g_source_remove (application->priv->inactivity_timeout_id);
application->priv->inactivity_timeout_id = 0;
}
application->priv->use_count++;
}
static gboolean
inactivity_timeout_expired (gpointer data)
{
GApplication *application = G_APPLICATION (data);
application->priv->inactivity_timeout_id = 0;
return G_SOURCE_REMOVE;
}
/**
* g_application_release:
* @application: a #GApplication
*
* Decrease the use count of @application.
*
* When the use count reaches zero, the application will stop running.
*
* Never call this function except to cancel the effect of a previous
* call to g_application_hold().
**/
void
g_application_release (GApplication *application)
{
g_return_if_fail (G_IS_APPLICATION (application));
g_return_if_fail (application->priv->use_count > 0);
application->priv->use_count--;
if (application->priv->use_count == 0 && application->priv->inactivity_timeout)
application->priv->inactivity_timeout_id = g_timeout_add (application->priv->inactivity_timeout,
inactivity_timeout_expired, application);
}
/* Activate, Open {{{1 */
/**
* g_application_activate:
* @application: a #GApplication
*
* Activates the application.
*
* In essence, this results in the #GApplication::activate signal being
* emitted in the primary instance.
*
* The application must be registered before calling this function.
*
* Since: 2.28
**/
void
g_application_activate (GApplication *application)
{
g_return_if_fail (G_IS_APPLICATION (application));
g_return_if_fail (application->priv->is_registered);
if (application->priv->is_remote)
g_application_impl_activate (application->priv->impl,
get_platform_data (application, NULL));
else
g_signal_emit (application, g_application_signals[SIGNAL_ACTIVATE], 0);
}
/**
* g_application_open:
* @application: a #GApplication
* @files: (array length=n_files): an array of #GFiles to open
* @n_files: the length of the @files array
* @hint: a hint (or ""), but never %NULL
*
* Opens the given files.
*
* In essence, this results in the #GApplication::open signal being emitted
* in the primary instance.
*
* @n_files must be greater than zero.
*
* @hint is simply passed through to the ::open signal. It is
* intended to be used by applications that have multiple modes for
* opening files (eg: "view" vs "edit", etc). Unless you have a need
* for this functionality, you should use "".
*
* The application must be registered before calling this function
* and it must have the %G_APPLICATION_HANDLES_OPEN flag set.
*
* Since: 2.28
**/
void
g_application_open (GApplication *application,
GFile **files,
gint n_files,
const gchar *hint)
{
g_return_if_fail (G_IS_APPLICATION (application));
g_return_if_fail (application->priv->flags &
G_APPLICATION_HANDLES_OPEN);
g_return_if_fail (application->priv->is_registered);
if (application->priv->is_remote)
g_application_impl_open (application->priv->impl,
files, n_files, hint,
get_platform_data (application, NULL));
else
g_signal_emit (application, g_application_signals[SIGNAL_OPEN],
0, files, n_files, hint);
}
/* Run {{{1 */
/**
* g_application_run:
* @application: a #GApplication
* @argc: the argc from main() (or 0 if @argv is %NULL)
* @argv: (array length=argc) (element-type filename) (nullable):
* the argv from main(), or %NULL
*
* Runs the application.
*
* This function is intended to be run from main() and its return value
* is intended to be returned by main(). Although you are expected to pass
* the @argc, @argv parameters from main() to this function, it is possible
* to pass %NULL if @argv is not available or commandline handling is not
* required. Note that on Windows, @argc and @argv are ignored, and
* g_win32_get_command_line() is called internally (for proper support
* of Unicode commandline arguments).
*
* #GApplication will attempt to parse the commandline arguments. You
* can add commandline flags to the list of recognised options by way of
* g_application_add_main_option_entries(). After this, the
* #GApplication::handle-local-options signal is emitted, from which the
* application can inspect the values of its #GOptionEntrys.
*
* #GApplication::handle-local-options is a good place to handle options
* such as `--version`, where an immediate reply from the local process is
* desired (instead of communicating with an already-running instance).
* A #GApplication::handle-local-options handler can stop further processing
* by returning a non-negative value, which then becomes the exit status of
* the process.
*
* What happens next depends on the flags: if
* %G_APPLICATION_HANDLES_COMMAND_LINE was specified then the remaining
* commandline arguments are sent to the primary instance, where a
* #GApplication::command-line signal is emitted. Otherwise, the
* remaining commandline arguments are assumed to be a list of files.
* If there are no files listed, the application is activated via the
* #GApplication::activate signal. If there are one or more files, and
* %G_APPLICATION_HANDLES_OPEN was specified then the files are opened
* via the #GApplication::open signal.
*
* If you are interested in doing more complicated local handling of the
* commandline then you should implement your own #GApplication subclass
* and override local_command_line(). In this case, you most likely want
* to return %TRUE from your local_command_line() implementation to
* suppress the default handling. See
* [gapplication-example-cmdline2.c][https://gitlab.gnome.org/GNOME/glib/-/blob/HEAD/gio/tests/gapplication-example-cmdline2.c]
* for an example.
*
* If, after the above is done, the use count of the application is zero
* then the exit status is returned immediately. If the use count is
* non-zero then the default main context is iterated until the use count
* falls to zero, at which point 0 is returned.
*
* If the %G_APPLICATION_IS_SERVICE flag is set, then the service will
* run for as much as 10 seconds with a use count of zero while waiting
* for the message that caused the activation to arrive. After that,
* if the use count falls to zero the application will exit immediately,
* except in the case that g_application_set_inactivity_timeout() is in
* use.
*
* This function sets the prgname (g_set_prgname()), if not already set,
* to the basename of argv[0].
*
* Much like g_main_loop_run(), this function will acquire the main context
* for the duration that the application is running.
*
* Since 2.40, applications that are not explicitly flagged as services
* or launchers (ie: neither %G_APPLICATION_IS_SERVICE or
* %G_APPLICATION_IS_LAUNCHER are given as flags) will check (from the
* default handler for local_command_line) if "--gapplication-service"
* was given in the command line. If this flag is present then normal
* commandline processing is interrupted and the
* %G_APPLICATION_IS_SERVICE flag is set. This provides a "compromise"
* solution whereby running an application directly from the commandline
* will invoke it in the normal way (which can be useful for debugging)
* while still allowing applications to be D-Bus activated in service
* mode. The D-Bus service file should invoke the executable with
* "--gapplication-service" as the sole commandline argument. This
* approach is suitable for use by most graphical applications but
* should not be used from applications like editors that need precise
* control over when processes invoked via the commandline will exit and
* what their exit status will be.
*
* Returns: the exit status
*
* Since: 2.28
**/
int
g_application_run (GApplication *application,
int argc,
char **argv)
{
gchar **arguments;
int status;
GMainContext *context;
gboolean acquired_context;
g_return_val_if_fail (G_IS_APPLICATION (application), 1);
g_return_val_if_fail (argc == 0 || argv != NULL, 1);
g_return_val_if_fail (!application->priv->must_quit_now, 1);
#ifdef G_OS_WIN32
{
gint new_argc = 0;
arguments = g_win32_get_command_line ();
/*
* CommandLineToArgvW(), which is called by g_win32_get_command_line(),
* pulls in the whole command line that is used to call the program. This is
* fine in cases where the program is a .exe program, but in the cases where the
* program is a called via a script, such as PyGObject's gtk-demo.py, which is normally
* called using 'python gtk-demo.py' on Windows, the program name (argv[0])
* returned by g_win32_get_command_line() will not be the argv[0] that ->local_command_line()
* would expect, causing the program to fail with "This application can not open files."
*/
new_argc = g_strv_length (arguments);
if (new_argc > argc)
{
gint i;
for (i = 0; i < new_argc - argc; i++)
g_free (arguments[i]);
memmove (&arguments[0],
&arguments[new_argc - argc],
sizeof (arguments[0]) * (argc + 1));
}
}
#elif defined(__APPLE__)
{
gint i, j;
/*
* OSX adds an unexpected parameter on the format -psn_X_XXXXXX
* when opening the application using Launch Services. In order
* to avoid that GOption fails to parse this parameter we just
* skip it if it was provided.
* See: https://gitlab.gnome.org/GNOME/glib/issues/1784
*/
arguments = g_new (gchar *, argc + 1);
for (i = 0, j = 0; i < argc; i++)
{
if (!g_str_has_prefix (argv[i], "-psn_"))
{
arguments[j] = g_strdup (argv[i]);
j++;
}
}
arguments[j] = NULL;
}
#else
{
gint i;
arguments = g_new (gchar *, argc + 1);
for (i = 0; i < argc; i++)
arguments[i] = g_strdup (argv[i]);
arguments[i] = NULL;
}
#endif
if (g_get_prgname () == NULL && argc > 0)
{
gchar *prgname;
prgname = g_path_get_basename (argv[0]);
GLIB_PRIVATE_CALL (g_set_prgname_once) (prgname);
g_free (prgname);
}
context = g_main_context_default ();
acquired_context = g_main_context_acquire (context);
if (!acquired_context)
{
g_critical ("g_application_run() cannot acquire the default main context because it is already acquired by another thread!");
g_strfreev (arguments);
return 1;
}
if (!G_APPLICATION_GET_CLASS (application)
->local_command_line (application, &arguments, &status))
{
GError *error = NULL;
if (!g_application_register (application, NULL, &error))
{
g_printerr ("Failed to register: %s\n", error->message);
g_error_free (error);
return 1;
}
g_application_call_command_line (application, (const gchar **) arguments, NULL, &status);
}
g_strfreev (arguments);
if (application->priv->flags & G_APPLICATION_IS_SERVICE &&
application->priv->is_registered &&
!application->priv->use_count &&
!application->priv->inactivity_timeout_id)
{
application->priv->inactivity_timeout_id =
g_timeout_add (10000, inactivity_timeout_expired, application);
}
while (application->priv->use_count || application->priv->inactivity_timeout_id)
{
if (application->priv->must_quit_now)
break;
g_main_context_iteration (context, TRUE);
status = 0;
}
if (application->priv->is_registered && !application->priv->is_remote)
{
g_signal_emit (application, g_application_signals[SIGNAL_SHUTDOWN], 0);
if (!application->priv->did_shutdown)
g_critical ("GApplication subclass '%s' failed to chain up on"
" ::shutdown (from end of override function)",
G_OBJECT_TYPE_NAME (application));
}
if (application->priv->impl)
{
if (application->priv->is_registered)
{
application->priv->is_registered = FALSE;
g_object_notify (G_OBJECT (application), "is-registered");
}
g_application_impl_flush (application->priv->impl);
g_application_impl_destroy (application->priv->impl);
application->priv->impl = NULL;
}
g_settings_sync ();
if (!application->priv->must_quit_now)
while (g_main_context_iteration (context, FALSE))
;
g_main_context_release (context);
return status;
}
static gchar **
g_application_list_actions (GActionGroup *action_group)
{
GApplication *application = G_APPLICATION (action_group);
g_return_val_if_fail (application->priv->is_registered, NULL);
if (application->priv->remote_actions != NULL)
return g_action_group_list_actions (G_ACTION_GROUP (application->priv->remote_actions));
else if (application->priv->actions != NULL)
return g_action_group_list_actions (application->priv->actions);
else
/* empty string array */
return g_new0 (gchar *, 1);
}
static gboolean
g_application_query_action (GActionGroup *group,
const gchar *action_name,
gboolean *enabled,
const GVariantType **parameter_type,
const GVariantType **state_type,
GVariant **state_hint,
GVariant **state)
{
GApplication *application = G_APPLICATION (group);
g_return_val_if_fail (application->priv->is_registered, FALSE);
if (application->priv->remote_actions != NULL)
return g_action_group_query_action (G_ACTION_GROUP (application->priv->remote_actions),
action_name,
enabled,
parameter_type,
state_type,
state_hint,
state);
if (application->priv->actions != NULL)
return g_action_group_query_action (application->priv->actions,
action_name,
enabled,
parameter_type,
state_type,
state_hint,
state);
return FALSE;
}
static void
g_application_change_action_state (GActionGroup *action_group,
const gchar *action_name,
GVariant *value)
{
GApplication *application = G_APPLICATION (action_group);
g_return_if_fail (application->priv->is_remote ||
application->priv->actions != NULL);
g_return_if_fail (application->priv->is_registered);
if (application->priv->remote_actions)
g_remote_action_group_change_action_state_full (application->priv->remote_actions,
action_name, value, get_platform_data (application, NULL));
else
g_action_group_change_action_state (application->priv->actions, action_name, value);
}
static void
g_application_activate_action (GActionGroup *action_group,
const gchar *action_name,
GVariant *parameter)
{
GApplication *application = G_APPLICATION (action_group);
g_return_if_fail (application->priv->is_remote ||
application->priv->actions != NULL);
g_return_if_fail (application->priv->is_registered);
if (application->priv->remote_actions)
g_remote_action_group_activate_action_full (application->priv->remote_actions,
action_name, parameter, get_platform_data (application, NULL));
else
g_action_group_activate_action (application->priv->actions, action_name, parameter);
}
static GAction *
g_application_lookup_action (GActionMap *action_map,
const gchar *action_name)
{
GApplication *application = G_APPLICATION (action_map);
g_return_val_if_fail (G_IS_ACTION_MAP (application->priv->actions), NULL);
return g_action_map_lookup_action (G_ACTION_MAP (application->priv->actions), action_name);
}
static void
g_application_add_action (GActionMap *action_map,
GAction *action)
{
GApplication *application = G_APPLICATION (action_map);
g_return_if_fail (G_IS_ACTION_MAP (application->priv->actions));
g_action_map_add_action (G_ACTION_MAP (application->priv->actions), action);
}
static void
g_application_remove_action (GActionMap *action_map,
const gchar *action_name)
{
GApplication *application = G_APPLICATION (action_map);
g_return_if_fail (G_IS_ACTION_MAP (application->priv->actions));
g_action_map_remove_action (G_ACTION_MAP (application->priv->actions), action_name);
}
static void
g_application_action_group_iface_init (GActionGroupInterface *iface)
{
iface->list_actions = g_application_list_actions;
iface->query_action = g_application_query_action;
iface->change_action_state = g_application_change_action_state;
iface->activate_action = g_application_activate_action;
}
static void
g_application_action_map_iface_init (GActionMapInterface *iface)
{
iface->lookup_action = g_application_lookup_action;
iface->add_action = g_application_add_action;
iface->remove_action = g_application_remove_action;
}
/* Default Application {{{1 */
static GApplication *default_app;
/**
* g_application_get_default:
*
* Returns the default #GApplication instance for this process.
*
* Normally there is only one #GApplication per process and it becomes
* the default when it is created. You can exercise more control over
* this by using g_application_set_default().
*
* If there is no default application then %NULL is returned.
*
* Returns: (nullable) (transfer none): the default application for this process, or %NULL
*
* Since: 2.32
**/
GApplication *
g_application_get_default (void)
{
return default_app;
}
/**
* g_application_set_default:
* @application: (nullable): the application to set as default, or %NULL
*
* Sets or unsets the default application for the process, as returned
* by g_application_get_default().
*
* This function does not take its own reference on @application. If
* @application is destroyed then the default application will revert
* back to %NULL.
*
* Since: 2.32
**/
void
g_application_set_default (GApplication *application)
{
default_app = application;
}
/**
* g_application_quit:
* @application: a #GApplication
*
* Immediately quits the application.
*
* Upon return to the mainloop, g_application_run() will return,
* calling only the 'shutdown' function before doing so.
*
* The hold count is ignored.
* Take care if your code has called g_application_hold() on the application and
* is therefore still expecting it to exist.
* (Note that you may have called g_application_hold() indirectly, for example
* through gtk_application_add_window().)
*
* The result of calling g_application_run() again after it returns is
* unspecified.
*
* Since: 2.32
**/
void
g_application_quit (GApplication *application)
{
g_return_if_fail (G_IS_APPLICATION (application));
application->priv->must_quit_now = TRUE;
}
/**
* g_application_mark_busy:
* @application: a #GApplication
*
* Increases the busy count of @application.
*
* Use this function to indicate that the application is busy, for instance
* while a long running operation is pending.
*
* The busy state will be exposed to other processes, so a session shell will
* use that information to indicate the state to the user (e.g. with a
* spinner).
*
* To cancel the busy indication, use g_application_unmark_busy().
*
* The application must be registered before calling this function.
*
* Since: 2.38
**/
void
g_application_mark_busy (GApplication *application)
{
gboolean was_busy;
g_return_if_fail (G_IS_APPLICATION (application));
g_return_if_fail (application->priv->is_registered);
was_busy = (application->priv->busy_count > 0);
application->priv->busy_count++;
if (!was_busy)
{
g_application_impl_set_busy_state (application->priv->impl, TRUE);
g_object_notify (G_OBJECT (application), "is-busy");
}
}
/**
* g_application_unmark_busy:
* @application: a #GApplication
*
* Decreases the busy count of @application.
*
* When the busy count reaches zero, the new state will be propagated
* to other processes.
*
* This function must only be called to cancel the effect of a previous
* call to g_application_mark_busy().
*
* Since: 2.38
**/
void
g_application_unmark_busy (GApplication *application)
{
g_return_if_fail (G_IS_APPLICATION (application));
g_return_if_fail (application->priv->busy_count > 0);
application->priv->busy_count--;
if (application->priv->busy_count == 0)
{
g_application_impl_set_busy_state (application->priv->impl, FALSE);
g_object_notify (G_OBJECT (application), "is-busy");
}
}
/**
* g_application_get_is_busy:
* @application: a #GApplication
*
* Gets the application's current busy state, as set through
* g_application_mark_busy() or g_application_bind_busy_property().
*
* Returns: %TRUE if @application is currently marked as busy
*
* Since: 2.44
*/
gboolean
g_application_get_is_busy (GApplication *application)
{
g_return_val_if_fail (G_IS_APPLICATION (application), FALSE);
return application->priv->busy_count > 0;
}
/* Notifications {{{1 */
/**
* g_application_send_notification:
* @application: a #GApplication
* @id: (nullable): id of the notification, or %NULL
* @notification: the #GNotification to send
*
* Sends a notification on behalf of @application to the desktop shell.
* There is no guarantee that the notification is displayed immediately,
* or even at all.
*
* Notifications may persist after the application exits. It will be
* D-Bus-activated when the notification or one of its actions is
* activated.
*
* Modifying @notification after this call has no effect. However, the
* object can be reused for a later call to this function.
*
* @id may be any string that uniquely identifies the event for the
* application. It does not need to be in any special format. For
* example, "new-message" might be appropriate for a notification about
* new messages.
*
* If a previous notification was sent with the same @id, it will be
* replaced with @notification and shown again as if it was a new
* notification. This works even for notifications sent from a previous
* execution of the application, as long as @id is the same string.
*
* @id may be %NULL, but it is impossible to replace or withdraw
* notifications without an id.
*
* If @notification is no longer relevant, it can be withdrawn with
* g_application_withdraw_notification().
*
* It is an error to call this function if @application has no
* application ID.
*
* Since: 2.40
*/
void
g_application_send_notification (GApplication *application,
const gchar *id,
GNotification *notification)
{
gchar *generated_id = NULL;
g_return_if_fail (G_IS_APPLICATION (application));
g_return_if_fail (G_IS_NOTIFICATION (notification));
g_return_if_fail (g_application_get_is_registered (application));
g_return_if_fail (!g_application_get_is_remote (application));
g_return_if_fail (g_application_get_application_id (application) != NULL);
if (application->priv->notifications == NULL)
application->priv->notifications = g_notification_backend_new_default (application);
if (id == NULL)
{
generated_id = g_dbus_generate_guid ();
id = generated_id;
}
g_notification_backend_send_notification (application->priv->notifications, id, notification);
g_free (generated_id);
}
/**
* g_application_withdraw_notification:
* @application: a #GApplication
* @id: id of a previously sent notification
*
* Withdraws a notification that was sent with
* g_application_send_notification().
*
* This call does nothing if a notification with @id doesn't exist or
* the notification was never sent.
*
* This function works even for notifications sent in previous
* executions of this application, as long @id is the same as it was for
* the sent notification.
*
* Note that notifications are dismissed when the user clicks on one
* of the buttons in a notification or triggers its default action, so
* there is no need to explicitly withdraw the notification in that case.
*
* Since: 2.40
*/
void
g_application_withdraw_notification (GApplication *application,
const gchar *id)
{
g_return_if_fail (G_IS_APPLICATION (application));
g_return_if_fail (id != NULL);
if (application->priv->notifications == NULL)
application->priv->notifications = g_notification_backend_new_default (application);
g_notification_backend_withdraw_notification (application->priv->notifications, id);
}
/* Busy binding {{{1 */
typedef struct
{
GApplication *app;
gboolean is_busy;
} GApplicationBusyBinding;
static void
g_application_busy_binding_destroy (gpointer data,
GClosure *closure)
{
GApplicationBusyBinding *binding = data;
if (binding->is_busy)
g_application_unmark_busy (binding->app);
g_object_unref (binding->app);
g_slice_free (GApplicationBusyBinding, binding);
}
static void
g_application_notify_busy_binding (GObject *object,
GParamSpec *pspec,
gpointer user_data)
{
GApplicationBusyBinding *binding = user_data;
gboolean is_busy;
g_object_get (object, pspec->name, &is_busy, NULL);
if (is_busy && !binding->is_busy)
g_application_mark_busy (binding->app);
else if (!is_busy && binding->is_busy)
g_application_unmark_busy (binding->app);
binding->is_busy = is_busy;
}
/**
* g_application_bind_busy_property:
* @application: a #GApplication
* @object: (type GObject.Object): a #GObject
* @property: the name of a boolean property of @object
*
* Marks @application as busy (see g_application_mark_busy()) while
* @property on @object is %TRUE.
*
* The binding holds a reference to @application while it is active, but
* not to @object. Instead, the binding is destroyed when @object is
* finalized.
*
* Since: 2.44
*/
void
g_application_bind_busy_property (GApplication *application,
gpointer object,
const gchar *property)
{
guint notify_id;
GQuark property_quark;
GParamSpec *pspec;
GApplicationBusyBinding *binding;
GClosure *closure;
g_return_if_fail (G_IS_APPLICATION (application));
g_return_if_fail (G_IS_OBJECT (object));
g_return_if_fail (property != NULL);
notify_id = g_signal_lookup ("notify", G_TYPE_OBJECT);
property_quark = g_quark_from_string (property);
pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (object), property);
g_return_if_fail (pspec != NULL && pspec->value_type == G_TYPE_BOOLEAN);
if (g_signal_handler_find (object, G_SIGNAL_MATCH_ID | G_SIGNAL_MATCH_DETAIL | G_SIGNAL_MATCH_FUNC,
notify_id, property_quark, NULL, g_application_notify_busy_binding, NULL) > 0)
{
g_critical ("%s: '%s' is already bound to the busy state of the application", G_STRFUNC, property);
return;
}
binding = g_slice_new (GApplicationBusyBinding);
binding->app = g_object_ref (application);
binding->is_busy = FALSE;
closure = g_cclosure_new (G_CALLBACK (g_application_notify_busy_binding), binding,
g_application_busy_binding_destroy);
g_signal_connect_closure_by_id (object, notify_id, property_quark, closure, FALSE);
/* fetch the initial value */
g_application_notify_busy_binding (object, pspec, binding);
}
/**
* g_application_unbind_busy_property:
* @application: a #GApplication
* @object: (type GObject.Object): a #GObject
* @property: the name of a boolean property of @object
*
* Destroys a binding between @property and the busy state of
* @application that was previously created with
* g_application_bind_busy_property().
*
* Since: 2.44
*/
void
g_application_unbind_busy_property (GApplication *application,
gpointer object,
const gchar *property)
{
guint notify_id;
GQuark property_quark;
gulong handler_id;
g_return_if_fail (G_IS_APPLICATION (application));
g_return_if_fail (G_IS_OBJECT (object));
g_return_if_fail (property != NULL);
notify_id = g_signal_lookup ("notify", G_TYPE_OBJECT);
property_quark = g_quark_from_string (property);
handler_id = g_signal_handler_find (object, G_SIGNAL_MATCH_ID | G_SIGNAL_MATCH_DETAIL | G_SIGNAL_MATCH_FUNC,
notify_id, property_quark, NULL, g_application_notify_busy_binding, NULL);
if (handler_id == 0)
{
g_critical ("%s: '%s' is not bound to the busy state of the application", G_STRFUNC, property);
return;
}
g_signal_handler_disconnect (object, handler_id);
}
/* Epilogue {{{1 */
/* vim:set foldmethod=marker: */
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