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glib/gio/gapplication.c
Philip Withnall eb0d9e709a gapplication: Document that command line options must be validated 
They come from an external process, so they must be validated.

In particular, it’s always easy to forget to validate the type of a
`GVariant`, and just try to get the stored value using a well-known
type; but that’s a programming error if the `GVariant` actually stores a
different type. Always check the variant type first if loading from a
`v`.

Signed-off-by: Philip Withnall <pwithnall@endlessos.org>

Helps: #1904
2022-12-09 10:45:21 +00:00

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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 "glibintl.h"
#include "gmarshal-internal.h"
#include <string.h>
/**
* SECTION:gapplication
* @title: GApplication
* @short_description: Core application class
* @include: gio/gio.h
*
* 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 g_application_hold() and g_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 g_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 g_application_run() promptly returns. See the code
* examples below.
*
* If used, the expected form of an application identifier is the same as
* that of 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 g_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
* g_application_register()). Unfortunately, this means that you cannot use
* g_application_get_is_remote() to decide if you want to register object paths.
*
* GApplication also implements the #GActionGroup and #GActionMap
* interfaces and lets you easily export actions by adding them with
* g_action_map_add_action(). When invoking an action by calling
* g_action_group_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 #GDBusActionGroup wrapper to
* conveniently access them remotely. GIO provides a #GDBusMenuModel wrapper
* for remote access to exported #GMenuModels.
*
* 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 #GApplication::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
* #GVariant dictionary mapping strings to variants. To use platform
* data, override the @before_emit or @after_emit virtual functions
* in your #GApplication subclass. When dealing with
* #GApplicationCommandLine objects, the platform data is
* directly available via g_application_command_line_get_cwd(),
* g_application_command_line_get_environ() and
* g_application_command_line_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 @add_platform_data
* virtual function. For instance, #GtkApplication adds startup notification
* data in this way.
*
* To parse commandline arguments you may handle the
* #GApplication::command-line signal or override the local_command_line()
* vfunc, 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).
*/
/**
* GApplication:
*
* #GApplication is an opaque data structure and can only be accessed
* using the following functions.
* 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 is 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 *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_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,
GError **error)
{
gboolean become_service = FALSE;
gchar *app_id = NULL;
gboolean replace = 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);
}
/* 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;
/* 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) a
* %NULL-terminated list of #GOptionEntrys
*
* 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;
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, exit_status);
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;
options = g_application_parse_command_line (application, arguments, &error);
if (!options)
{
g_printerr ("%s\n", error->message);
g_error_free (error);
*exit_status = 1;
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_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_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_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;
g_object_class_install_property (object_class, PROP_APPLICATION_ID,
g_param_spec_string ("application-id",
P_("Application identifier"),
P_("The unique identifier for the application"),
NULL, G_PARAM_READWRITE | G_PARAM_CONSTRUCT |
G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_FLAGS,
g_param_spec_flags ("flags",
P_("Application flags"),
P_("Flags specifying the behaviour of the application"),
G_TYPE_APPLICATION_FLAGS, G_APPLICATION_DEFAULT_FLAGS,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_RESOURCE_BASE_PATH,
g_param_spec_string ("resource-base-path",
P_("Resource base path"),
P_("The base resource path for the application"),
NULL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_IS_REGISTERED,
g_param_spec_boolean ("is-registered",
P_("Is registered"),
P_("If g_application_register() has been called"),
FALSE, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_IS_REMOTE,
g_param_spec_boolean ("is-remote",
P_("Is remote"),
P_("If this application instance is remote"),
FALSE, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_INACTIVITY_TIMEOUT,
g_param_spec_uint ("inactivity-timeout",
P_("Inactivity timeout"),
P_("Time (ms) to stay alive after becoming idle"),
0, G_MAXUINT, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_ACTION_GROUP,
g_param_spec_object ("action-group",
P_("Action group"),
P_("The group of actions that the application exports"),
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",
P_("Is busy"),
P_("If this application is currently marked busy"),
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_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]);
g_set_prgname (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().
*
* 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));
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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