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glib/gio/gapplication.c
Matthias Clasen 2cbc6d9ae6 GApplication: Implement query_action
2011-11-26 19:43:46 -05:00

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/*
* Copyright © 2010 Codethink Limited
*
* This program 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 of the licence 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, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* Authors: Ryan Lortie <desrt@desrt.ca>
*/
/* Prologue {{{1 */
#include "config.h"
#include "gapplication.h"
#include "gapplicationcommandline.h"
#include "gapplicationimpl.h"
#include "gactiongroup.h"
#include "gsettings.h"
#include "gioenumtypes.h"
#include "gioenums.h"
#include "gfile.h"
#include "glibintl.h"
#include <string.h>
/**
* SECTION:gapplication
* @title: GApplication
* @short_description: Core application class
*
* A #GApplication is the foundation of an application, unique for a
* given application identifier. The GApplication class 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.
*
* One of the core features that GApplication provides is process
* uniqueness, in the context of a "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
* <firstterm>primary instance</firstterm>.
*
* Before using GApplication, you must choose an "application identifier".
* The expected form of an application identifier is very close to that of
* of a <ulink url="http://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-names-interface">DBus bus name</ulink>.
* Examples include: "com.example.MyApp", "org.example.internal-apps.Calculator".
* For details on valid application identifiers, see
* g_application_id_is_valid().
*
* The application identifier is claimed by the application 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 provides convenient life cycle management by maintaining
* a <firstterm>use count</firstterm> 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.
*
* GApplication also implements the #GActionGroup interface and lets you
* easily export actions by adding them with g_application_set_action_group().
* When invoking an action by calling g_action_group_activate_action() on
* the application, it is always invoked in the primary instance.
*
* There is a number of different entry points into a #GApplication:
* <itemizedlist>
* <listitem>via 'Activate' (i.e. just starting the application)</listitem>
* <listitem>via 'Open' (i.e. opening some files)</listitem>
* <listitem>by handling a command-line</listitem>
* <listitem>via activating an action</listitem>
* </itemizedlist>
* 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 <firstterm id="platform-data">platform
* data</firstterm> 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_ENVIONMENT 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.
*
* <example id="gapplication-example-open"><title>Opening files with a GApplication</title>
* <programlisting>
* <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../gio/tests/gapplication-example-open.c">
* <xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback>
* </xi:include>
* </programlisting>
* </example>
*
* <example id="gapplication-example-actions"><title>A GApplication with actions</title>
* <programlisting>
* <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../gio/tests/gapplication-example-actions.c">
* <xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback>
* </xi:include>
* </programlisting>
* </example>
*/
struct _GApplicationPrivate
{
GApplicationFlags flags;
gchar *id;
GActionGroup *actions;
guint inactivity_timeout_id;
guint inactivity_timeout;
guint use_count;
guint is_registered : 1;
guint is_remote : 1;
guint did_startup : 1;
guint did_shutdown : 1;
GHashTable *remote_actions; /* string -> RemoteActionInfo */
GApplicationImpl *impl;
};
enum
{
PROP_NONE,
PROP_APPLICATION_ID,
PROP_FLAGS,
PROP_IS_REGISTERED,
PROP_IS_REMOTE,
PROP_INACTIVITY_TIMEOUT,
PROP_ACTION_GROUP
};
enum
{
SIGNAL_STARTUP,
SIGNAL_SHUTDOWN,
SIGNAL_ACTIVATE,
SIGNAL_OPEN,
SIGNAL_ACTION,
SIGNAL_COMMAND_LINE,
NR_SIGNALS
};
static guint g_application_signals[NR_SIGNALS];
static void g_application_action_group_iface_init (GActionGroupInterface *);
G_DEFINE_TYPE_WITH_CODE (GApplication, g_application, G_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (G_TYPE_ACTION_GROUP,
g_application_action_group_iface_init))
/* 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 gboolean
g_application_real_local_command_line (GApplication *application,
gchar ***arguments,
int *exit_status)
{
if (application->priv->flags & G_APPLICATION_HANDLES_COMMAND_LINE)
return FALSE;
else
{
GError *error = NULL;
gint n_args;
if (!g_application_register (application, NULL, &error))
{
g_critical ("%s", error->message);
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;
}
return TRUE;
}
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;
}
}
return TRUE;
}
}
static void
g_application_real_add_platform_data (GApplication *application,
GVariantBuilder *builder)
{
}
/* 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_INACTIVITY_TIMEOUT:
g_application_set_inactivity_timeout (application,
g_value_get_uint (value));
break;
case PROP_ACTION_GROUP:
g_application_set_action_group (application,
g_value_get_object (value));
break;
default:
g_assert_not_reached ();
}
}
/**
* g_application_set_action_group:
* @application: a #GApplication
* @action_group: (allow-none): a #GActionGroup, or %NULL
*
* Sets or unsets the group of actions associated with the application.
*
* These actions are the actions that can be remotely invoked.
*
* It is an error to call this function after the application has been
* registered.
*
* Since: 2.28
**/
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_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;
default:
g_assert_not_reached ();
}
}
static void
g_application_constructed (GObject *object)
{
GApplication *application = G_APPLICATION (object);
g_assert (application->priv->id != NULL);
}
static void
g_application_finalize (GObject *object)
{
GApplication *application = G_APPLICATION (object);
if (application->priv->impl)
g_application_impl_destroy (application->priv->impl);
g_free (application->priv->id);
G_OBJECT_CLASS (g_application_parent_class)
->finalize (object);
}
static void
g_application_init (GApplication *application)
{
application->priv = G_TYPE_INSTANCE_GET_PRIVATE (application,
G_TYPE_APPLICATION,
GApplicationPrivate);
}
static void
g_application_class_init (GApplicationClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
object_class->constructed = g_application_constructed;
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->add_platform_data = g_application_real_add_platform_data;
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_FLAGS_NONE,
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_WRITABLE | 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 ("startup", G_TYPE_APPLICATION, G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GApplicationClass, startup),
NULL, NULL, g_cclosure_marshal_VOID__VOID, 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 ("shutdown", G_TYPE_APPLICATION, G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GApplicationClass, shutdown),
NULL, NULL, g_cclosure_marshal_VOID__VOID, 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 ("activate", G_TYPE_APPLICATION, G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GApplicationClass, activate),
NULL, NULL, g_cclosure_marshal_VOID__VOID, 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 ("open", G_TYPE_APPLICATION, G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GApplicationClass, open),
NULL, NULL, NULL,
G_TYPE_NONE, 3, G_TYPE_POINTER, G_TYPE_INT, G_TYPE_STRING);
/**
* 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 ("command-line", G_TYPE_APPLICATION, G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GApplicationClass, command_line),
g_signal_accumulator_first_wins, NULL,
NULL,
G_TYPE_INT, 1, G_TYPE_APPLICATION_COMMAND_LINE);
g_type_class_add_private (class, sizeof (GApplicationPrivate));
}
static GVariant *
get_platform_data (GApplication *application)
{
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);
}
G_APPLICATION_GET_CLASS (application)->
add_platform_data (application, builder);
result = g_variant_builder_end (builder);
g_variant_builder_unref (builder);
return result;
}
/* 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().
*
* For convenience, the restrictions on application identifiers are
* reproduced here:
* <itemizedlist>
* <listitem>Application identifiers must contain only the ASCII characters "[A-Z][a-z][0-9]_-." and must not begin with a digit.</listitem>
* <listitem>Application identifiers must contain at least one '.' (period) character (and thus at least three elements).</listitem>
* <listitem>Application identifiers must not begin or end with a '.' (period) character.</listitem>
* <listitem>Application identifiers must not contain consecutive '.' (period) characters.</listitem>
* <listitem>Application identifiers must not exceed 255 characters.</listitem>
* </itemizedlist>
*
* Returns: %TRUE if @application_id is valid
**/
gboolean
g_application_id_is_valid (const gchar *application_id)
{
gsize len;
gboolean allow_dot;
gboolean has_dot;
len = strlen (application_id);
if (len > 255)
return FALSE;
if (!g_ascii_isalpha (application_id[0]))
return FALSE;
if (application_id[len-1] == '.')
return FALSE;
application_id++;
allow_dot = TRUE;
has_dot = FALSE;
for (; *application_id; application_id++)
{
if (g_ascii_isalnum (*application_id) ||
(*application_id == '-') ||
(*application_id == '_'))
{
allow_dot = TRUE;
}
else if (allow_dot && *application_id == '.')
{
has_dot = TRUE;
allow_dot = FALSE;
}
else
return FALSE;
}
if (!has_dot)
return FALSE;
return TRUE;
}
/* Public Constructor {{{1 */
/**
* g_application_new:
* @application_id: the application id
* @flags: the application flags
*
* Creates a new #GApplication instance.
*
* This function calls g_type_init() for you.
*
* The application id must be valid. See g_application_id_is_valid().
*
* Returns: a new #GApplication instance
**/
GApplication *
g_application_new (const gchar *application_id,
GApplicationFlags flags)
{
g_return_val_if_fail (g_application_id_is_valid (application_id), NULL);
g_type_init ();
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: 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: the identifier for @application
*
* Sets the unique identifier for @application.
*
* The application id can only be modified if @application has not yet
* been registered.
*
* 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 (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_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) {{{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;
}
/* Register {{{1 */
/**
* g_application_register:
* @application: a #GApplication
* @cancellable: 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.
*
* 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.
*
* 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->flags & G_APPLICATION_NON_UNIQUE)
{
application->priv->impl =
g_application_impl_register (application, application->priv->id,
application->priv->flags,
&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)
{
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 FALSE;
}
/**
* 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)
{
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));
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));
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) (allow-none): 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.
*
* First, the local_command_line() virtual function is invoked.
* This function always runs on the local instance. It gets passed a pointer
* to a %NULL-terminated copy of @argv and is expected to remove the arguments
* that it handled (shifting up remaining arguments). See
* <xref linkend="gapplication-example-cmdline2"/> for an example of
* parsing @argv manually. Alternatively, you may use the #GOptionContext API,
* after setting <literal>argc = g_strv_length (argv);</literal>.
*
* The last argument to local_command_line() is a pointer to the @status
* variable which can used to set the exit status that is returned from
* g_application_run().
*
* If local_command_line() returns %TRUE, the command line is expected
* to be completely handled, including possibly registering as the primary
* instance, calling g_application_activate() or g_application_open(), etc.
*
* If local_command_line() returns %FALSE then the application is registered
* and the #GApplication::command-line signal is emitted in the primary
* instance (which may or may not be this instance). The signal handler
* gets passed a #GApplicationCommandline object that (among other things)
* contains the remaining commandline arguments that have not been handled
* by local_command_line().
*
* If the application has the %G_APPLICATION_HANDLES_COMMAND_LINE
* flag set then the default implementation of local_command_line()
* always returns %FALSE immediately, resulting in the commandline
* always being handled in the primary instance.
*
* Otherwise, the default implementation of local_command_line() tries
* to do a couple of things that are probably reasonable for most
* applications. First, g_application_register() is called to attempt
* to register the application. If that works, then the command line
* arguments are inspected. If no commandline arguments are given, then
* g_application_activate() is called. If commandline arguments are
* given and the %G_APPLICATION_HANDLES_OPEN flag is set then they
* are assumed to be filenames and g_application_open() is called.
*
* If you need to handle commandline arguments that are not filenames,
* and you don't mind commandline handling to happen in the primary
* instance, you should set %G_APPLICATION_HANDLED_COMMAND_LINE and
* process the commandline arguments in your #GApplication::command-line
* signal handler, either manually or using the #GOptionContext API.
*
* 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
* <xref linkend="gapplication-example-cmdline2"/> 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 mainloop is run until the use count falls to zero,
* at which point 0 is returned.
*
* If the %G_APPLICATION_IS_SERVICE flag is set, then the exiting at
* use count of zero is delayed for a while (ie: the instance stays
* around to provide its <emphasis>service</emphasis> to others).
*
* Returns: the exit status
*
* Since: 2.28
**/
int
g_application_run (GApplication *application,
int argc,
char **argv)
{
gchar **arguments;
int status;
gint i;
g_return_val_if_fail (G_IS_APPLICATION (application), 1);
g_return_val_if_fail (argc == 0 || argv != NULL, 1);
arguments = g_new (gchar *, argc + 1);
for (i = 0; i < argc; i++)
arguments[i] = g_strdup (argv[i]);
arguments[i] = NULL;
if (g_get_prgname () == NULL && argc > 0)
{
gchar *prgname;
prgname = g_path_get_basename (argv[0]);
g_set_prgname (prgname);
g_free (prgname);
}
if (!G_APPLICATION_GET_CLASS (application)
->local_command_line (application, &arguments, &status))
{
GError *error = NULL;
if (!g_application_register (application, NULL, &error))
{
g_printerr ("%s", error->message);
g_error_free (error);
return 1;
}
if (application->priv->is_remote)
{
GVariant *platform_data;
platform_data = get_platform_data (application);
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, NULL);
g_signal_emit (application,
g_application_signals[SIGNAL_COMMAND_LINE],
0, cmdline, &status);
g_object_unref (cmdline);
}
}
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)
{
g_main_context_iteration (NULL, TRUE);
status = 0;
}
if (!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)
g_application_impl_flush (application->priv->impl);
g_settings_sync ();
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)
{
GHashTableIter iter;
gint n, i = 0;
gchar **keys;
gpointer key;
n = g_hash_table_size (application->priv->remote_actions);
keys = g_new (gchar *, n + 1);
g_hash_table_iter_init (&iter, application->priv->remote_actions);
while (g_hash_table_iter_next (&iter, &key, NULL))
keys[i++] = g_strdup (key);
g_assert_cmpint (i, ==, n);
keys[n] = NULL;
return keys;
}
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);
if (application->priv->remote_actions != NULL)
{
RemoteActionInfo *info;
info = g_hash_table_lookup (application->priv->remote_actions,
action_name);
if (info == NULL)
return FALSE;
if (enabled)
*enabled = info->enabled;
if (parameter_type)
*parameter_type = info->parameter_type;
if (state_type)
*state_type = info->state ? g_variant_get_type (info->state) : NULL;
if (state_hint)
*state_hint = NULL;
if (state)
*state = info->state ? g_variant_ref (info->state) : NULL;
return TRUE;
}
else 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->is_remote)
g_application_impl_change_action_state (application->priv->impl,
action_name, value,
get_platform_data (application));
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->is_remote)
g_application_impl_activate_action (application->priv->impl,
action_name, parameter,
get_platform_data (application));
else
g_action_group_activate_action (application->priv->actions,
action_name, parameter);
}
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;
}
/* Epilogue {{{1 */
/* vim:set foldmethod=marker: */
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