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gtk2/gtk/gtkapplication.c
Matthias Clasen d1099b1759 Document gtk_application_get_menu_by_id
2014-07-07 19:44:39 -04:00

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/*
* Copyright © 2010 Codethink Limited
* Copyright © 2013 Canonical Limited
*
* 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 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, see <http://www.gnu.org/licenses/>.
*
* Author: Ryan Lortie <desrt@desrt.ca>
*/
#include "config.h"
#include "gtkapplication.h"
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <string.h>
#include "gtkapplicationprivate.h"
#include "gtkclipboard.h"
#include "gtkmarshalers.h"
#include "gtkmain.h"
#include "gtkrecentmanager.h"
#include "gtkaccelmapprivate.h"
#include "gtkicontheme.h"
#include "gtkbuilder.h"
#include "gtkintl.h"
/* NB: please do not add backend-specific GDK headers here. This should
* be abstracted via GtkApplicationImpl.
*/
/**
* SECTION:gtkapplication
* @title: GtkApplication
* @short_description: Application class
*
* #GtkApplication is a class that handles many important aspects
* of a GTK+ application in a convenient fashion, without enforcing
* a one-size-fits-all application model.
*
* Currently, GtkApplication handles GTK+ initialization, application
* uniqueness, session management, provides some basic scriptability and
* desktop shell integration by exporting actions and menus and manages a
* list of toplevel windows whose life-cycle is automatically tied to the
* life-cycle of your application.
*
* While GtkApplication works fine with plain #GtkWindows, it is recommended
* to use it together with #GtkApplicationWindow.
*
* When GDK threads are enabled, GtkApplication will acquire the GDK
* lock when invoking actions that arrive from other processes. The GDK
* lock is not touched for local action invocations. In order to have
* actions invoked in a predictable context it is therefore recommended
* that the GDK lock be held while invoking actions locally with
* g_action_group_activate_action(). The same applies to actions
* associated with #GtkApplicationWindow and to the “activate” and
* 'open' #GApplication methods.
*
* ## Automatic resources ## {#automatic-resources}
*
* #GtkApplication will automatically load menus from the #GtkBuilder
* file located at "gtk/menus.ui", relative to the application's
* resource base path (see g_application_set_resource_base_path()). The
* menu with the ID "app-menu" is taken as the application's app menu
* and the menu with the ID "menubar" is taken as the application's
* menubar. Additional menus (most interesting submenus) can be named
* and accessed via gtk_application_get_menu_by_id() which allows for
* dynamic population of a part of the menu structure.
*
* If the files "gtk/menus-appmenu.ui" or "gtk/menus-traditional.ui" are
* present then these files will be used in preference, depending on the
* value of gtk_application_prefers_app_menu().
*
* It is also possible to provide the menus manually using
* gtk_application_set_app_menu() and gtk_application_set_menubar().
*
* #GtkApplication will also automatically setup an icon search path for
* the default icon theme by appending "icons" to the resource base
* path. This allows your application to easily store its icons as
* resources. See gtk_icon_theme_add_resource_path() for more
* information.
*
* ## A simple application ## {#gtkapplication}
*
* [A simple example](https://git.gnome.org/browse/gtk+/tree/examples/bp/bloatpad.c)
*
* GtkApplication optionally registers with a session manager
* of the users session (if you set the #GtkApplication:register-session
* property) and offers various functionality related to the session
* life-cycle.
*
* An application can block various ways to end the session with
* the gtk_application_inhibit() function. Typical use cases for
* this kind of inhibiting are long-running, uninterruptible operations,
* such as burning a CD or performing a disk backup. The session
* manager may not honor the inhibitor, but it can be expected to
* inform the user about the negative consequences of ending the
* session while inhibitors are present.
*/
enum {
WINDOW_ADDED,
WINDOW_REMOVED,
LAST_SIGNAL
};
static guint gtk_application_signals[LAST_SIGNAL];
enum {
PROP_ZERO,
PROP_REGISTER_SESSION,
PROP_APP_MENU,
PROP_MENUBAR,
PROP_ACTIVE_WINDOW
};
/* Accel handling */
typedef struct
{
guint key;
GdkModifierType modifier;
} AccelKey;
typedef struct
{
GHashTable *action_to_accels;
GHashTable *accel_to_actions;
} Accels;
static AccelKey *
accel_key_copy (const AccelKey *source)
{
AccelKey *dest;
dest = g_slice_new (AccelKey);
dest->key = source->key;
dest->modifier = source->modifier;
return dest;
}
static void
accel_key_free (gpointer data)
{
AccelKey *key = data;
g_slice_free (AccelKey, key);
}
static guint
accel_key_hash (gconstpointer data)
{
const AccelKey *key = data;
return key->key + (key->modifier << 16);
}
static gboolean
accel_key_equal (gconstpointer a,
gconstpointer b)
{
const AccelKey *ak = a;
const AccelKey *bk = b;
return ak->key == bk->key && ak->modifier == bk->modifier;
}
static void
accels_foreach_key (Accels *accels,
GtkWindow *window,
GtkWindowKeysForeachFunc callback,
gpointer user_data)
{
GHashTableIter iter;
gpointer key;
g_hash_table_iter_init (&iter, accels->accel_to_actions);
while (g_hash_table_iter_next (&iter, &key, NULL))
{
AccelKey *accel_key = key;
(* callback) (window, accel_key->key, accel_key->modifier, FALSE, user_data);
}
}
static gboolean
accels_activate (Accels *accels,
GActionGroup *action_group,
guint key,
GdkModifierType modifier)
{
AccelKey accel_key = { key, modifier };
const gchar **actions;
gint i;
actions = g_hash_table_lookup (accels->accel_to_actions, &accel_key);
if (actions == NULL)
return FALSE;
/* We may have more than one action on a given accel. This could be
* the case if we have different types of windows with different
* actions in each.
*
* Find the first one that will successfully activate and use it.
*/
for (i = 0; actions[i]; i++)
{
const GVariantType *parameter_type;
const gchar *action_name;
const gchar *sep;
gboolean enabled;
GVariant *target;
sep = strrchr (actions[i], '|');
action_name = sep + 1;
if (!g_action_group_query_action (action_group, action_name, &enabled, &parameter_type, NULL, NULL, NULL))
continue;
if (!enabled)
continue;
/* We found an action with the correct name and it's enabled.
* This is the action that we are going to try to invoke.
*
* There is still the possibility that the target value doesn't
* match the expected parameter type. In that case, we will print
* a warning.
*
* Note: we want to hold a ref on the target while we're invoking
* the action to prevent trouble if someone uninstalls the accel
* from the handler. That's not a problem since we're parsing it.
*/
if (actions[i] != sep) /* if it has a target... */
{
GError *error = NULL;
if (parameter_type == NULL)
{
gchar *accel_str = gtk_accelerator_name (key, modifier);
g_warning ("Accelerator '%s' tries to invoke action '%s' with target, but action has no parameter",
accel_str, action_name);
g_free (accel_str);
return TRUE;
}
target = g_variant_parse (NULL, actions[i], sep, NULL, &error);
g_assert_no_error (error);
g_assert (target);
if (!g_variant_is_of_type (target, parameter_type))
{
gchar *accel_str = gtk_accelerator_name (key, modifier);
gchar *typestr = g_variant_type_dup_string (parameter_type);
gchar *targetstr = g_variant_print (target, TRUE);
g_warning ("Accelerator '%s' tries to invoke action '%s' with target '%s',"
" but action expects parameter with type '%s'", accel_str, action_name, targetstr, typestr);
g_variant_unref (target);
g_free (targetstr);
g_free (accel_str);
g_free (typestr);
return TRUE;
}
}
else
{
if (parameter_type != NULL)
{
gchar *accel_str = gtk_accelerator_name (key, modifier);
gchar *typestr = g_variant_type_dup_string (parameter_type);
g_warning ("Accelerator '%s' tries to invoke action '%s' without target,"
" but action expects parameter with type '%s'", accel_str, action_name, typestr);
g_free (accel_str);
g_free (typestr);
return TRUE;
}
target = NULL;
}
g_action_group_activate_action (action_group, action_name, target);
if (target)
g_variant_unref (target);
return TRUE;
}
return FALSE;
}
static void
accels_add_entry (Accels *accels,
AccelKey *key,
const gchar *action_and_target)
{
const gchar **old;
const gchar **new;
gint n;
old = g_hash_table_lookup (accels->accel_to_actions, key);
if (old != NULL)
for (n = 0; old[n]; n++) /* find the length */
;
else
n = 0;
new = g_new (const gchar *, n + 1 + 1);
memcpy (new, old, n * sizeof (const gchar *));
new[n] = action_and_target;
new[n + 1] = NULL;
g_hash_table_insert (accels->accel_to_actions, accel_key_copy (key), new);
}
static void
accels_remove_entry (Accels *accels,
AccelKey *key,
const gchar *action_and_target)
{
const gchar **old;
const gchar **new;
gint n, i;
/* if we can't find the entry then something has gone very wrong... */
old = g_hash_table_lookup (accels->accel_to_actions, key);
g_assert (old != NULL);
for (n = 0; old[n]; n++) /* find the length */
;
g_assert_cmpint (n, >, 0);
if (n == 1)
{
/* The simple case of removing the last action for an accel. */
g_assert_cmpstr (old[0], ==, action_and_target);
g_hash_table_remove (accels->accel_to_actions, key);
return;
}
for (i = 0; i < n; i++)
if (g_str_equal (old[i], action_and_target))
break;
/* We must have found it... */
g_assert_cmpint (i, <, n);
new = g_new (const gchar *, n - 1 + 1);
memcpy (new, old, i * sizeof (const gchar *));
memcpy (new + i, old + i + 1, (n - (i + 1)) * sizeof (const gchar *));
new[n - 1] = NULL;
g_hash_table_insert (accels->accel_to_actions, accel_key_copy (key), new);
}
static void
accels_set_accels_for_action (Accels *accels,
const gchar *action_and_target,
const gchar * const *accelerators)
{
AccelKey *keys, *old_keys;
gint i, n;
n = accelerators ? g_strv_length ((gchar **) accelerators) : 0;
if (n > 0)
{
keys = g_new0 (AccelKey, n + 1);
for (i = 0; i < n; i++)
{
gtk_accelerator_parse (accelerators[i], &keys[i].key, &keys[i].modifier);
if (keys[i].key == 0)
{
g_warning ("Unable to parse accelerator '%s': ignored request to install %d accelerators",
accelerators[i], n);
g_free (keys);
return;
}
}
}
else
keys = NULL;
old_keys = g_hash_table_lookup (accels->action_to_accels, action_and_target);
if (old_keys)
{
/* We need to remove accel entries from existing keys */
for (i = 0; old_keys[i].key; i++)
accels_remove_entry (accels, &old_keys[i], action_and_target);
}
if (keys)
{
gchar *my_key;
gint i;
my_key = g_strdup (action_and_target);
g_hash_table_replace (accels->action_to_accels, my_key, keys);
for (i = 0; i < n; i++)
accels_add_entry (accels, &keys[i], my_key);
}
else
g_hash_table_remove (accels->action_to_accels, action_and_target);
}
gchar **
accels_get_accels_for_action (Accels *accels,
const gchar *action_and_target)
{
AccelKey *keys;
gchar **result;
gint n, i = 0;
keys = g_hash_table_lookup (accels->action_to_accels, action_and_target);
if (!keys)
return g_new0 (gchar *, 0 + 1);
for (n = 0; keys[n].key; n++)
;
result = g_new0 (gchar *, n + 1);
for (i = 0; i < n; i++)
result[i] = gtk_accelerator_name (keys[i].key, keys[i].modifier);
return result;
}
static void
accels_init (Accels *accels)
{
accels->accel_to_actions = g_hash_table_new_full (accel_key_hash, accel_key_equal,
accel_key_free, g_free);
accels->action_to_accels = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
}
static void
accels_finalize (Accels *accels)
{
g_hash_table_unref (accels->accel_to_actions);
g_hash_table_unref (accels->action_to_accels);
}
struct _GtkApplicationPrivate
{
GtkApplicationImpl *impl;
GList *windows;
GMenuModel *app_menu;
GMenuModel *menubar;
Accels accels;
guint last_window_id;
gboolean register_session;
GtkActionMuxer *muxer;
GtkBuilder *menus_builder;
};
G_DEFINE_TYPE_WITH_PRIVATE (GtkApplication, gtk_application, G_TYPE_APPLICATION)
const gchar *
gtk_application_get_app_menu_object_path (GtkApplication *application)
{
g_assert_not_reached (); /* XXX */
}
const gchar *
gtk_application_get_menubar_object_path (GtkApplication *application)
{
g_assert_not_reached (); /* XXX */
}
static gboolean
gtk_application_focus_in_event_cb (GtkWindow *window,
GdkEventFocus *event,
GtkApplication *application)
{
GtkApplicationPrivate *priv = application->priv;
GList *link;
/* Keep the window list sorted by most-recently-focused. */
link = g_list_find (priv->windows, window);
if (link != NULL && link != priv->windows)
{
priv->windows = g_list_remove_link (priv->windows, link);
priv->windows = g_list_concat (link, priv->windows);
}
gtk_application_impl_active_window_changed (application->priv->impl, window);
g_object_notify (G_OBJECT (application), "active-window");
return FALSE;
}
static void
gtk_application_load_resources (GtkApplication *application)
{
const gchar *base_path;
base_path = g_application_get_resource_base_path (G_APPLICATION (application));
if (base_path == NULL)
return;
/* Expand the icon search path */
{
GtkIconTheme *default_theme;
gchar *iconspath;
default_theme = gtk_icon_theme_get_default ();
iconspath = g_strconcat (base_path, "/icons", NULL);
gtk_icon_theme_add_resource_path (default_theme, iconspath);
g_free (iconspath);
}
/* Load the menus */
{
gchar *menuspath;
/* If the user has given a specific file for the variant of menu
* that we are looking for, use it with preference.
*/
if (gtk_application_prefers_app_menu (application))
menuspath = g_strconcat (base_path, "/gtk/menus-appmenu.ui", NULL);
else
menuspath = g_strconcat (base_path, "/gtk/menus-traditional.ui", NULL);
if (g_resources_get_info (menuspath, G_RESOURCE_LOOKUP_FLAGS_NONE, NULL, NULL, NULL))
application->priv->menus_builder = gtk_builder_new_from_resource (menuspath);
g_free (menuspath);
/* If we didn't get the specific file, fall back. */
if (application->priv->menus_builder == NULL)
{
menuspath = g_strconcat (base_path, "/gtk/menus.ui", NULL);
if (g_resources_get_info (menuspath, G_RESOURCE_LOOKUP_FLAGS_NONE, NULL, NULL, NULL))
application->priv->menus_builder = gtk_builder_new_from_resource (menuspath);
g_free (menuspath);
}
if (application->priv->menus_builder)
{
GObject *menu;
menu = gtk_builder_get_object (application->priv->menus_builder, "app-menu");
if (menu != NULL && G_IS_MENU_MODEL (menu))
gtk_application_set_app_menu (application, G_MENU_MODEL (menu));
menu = gtk_builder_get_object (application->priv->menus_builder, "menubar");
if (menu != NULL && G_IS_MENU_MODEL (menu))
gtk_application_set_menubar (application, G_MENU_MODEL (menu));
}
}
}
static void
gtk_application_startup (GApplication *g_application)
{
GtkApplication *application = GTK_APPLICATION (g_application);
G_APPLICATION_CLASS (gtk_application_parent_class)
->startup (g_application);
gtk_action_muxer_insert (application->priv->muxer, "app", G_ACTION_GROUP (application));
gtk_init (0, 0);
application->priv->impl = gtk_application_impl_new (application, gdk_display_get_default ());
gtk_application_impl_startup (application->priv->impl, application->priv->register_session);
gtk_application_load_resources (application);
}
static void
gtk_application_shutdown (GApplication *g_application)
{
GtkApplication *application = GTK_APPLICATION (g_application);
gtk_application_impl_shutdown (application->priv->impl);
g_clear_object (&application->priv->impl);
gtk_action_muxer_remove (application->priv->muxer, "app");
/* Keep this section in sync with gtk_main() */
/* Try storing all clipboard data we have */
_gtk_clipboard_store_all ();
/* Synchronize the recent manager singleton */
_gtk_recent_manager_sync ();
G_APPLICATION_CLASS (gtk_application_parent_class)
->shutdown (g_application);
}
static gboolean
gtk_application_local_command_line (GApplication *application,
gchar ***arguments,
gint *exit_status)
{
g_application_add_option_group (application, gtk_get_option_group (FALSE));
return G_APPLICATION_CLASS (gtk_application_parent_class)->local_command_line (application, arguments, exit_status);
}
static void
gtk_application_add_platform_data (GApplication *application,
GVariantBuilder *builder)
{
const gchar *startup_id;
/* This is slightly evil.
*
* We don't have an impl here because we're remote so we can't figure
* out what to do on a per-display-server basis.
*
* So we do all the things... which currently is just one thing.
*/
startup_id = getenv ("DESKTOP_STARTUP_ID");
if (startup_id && g_utf8_validate (startup_id, -1, NULL))
g_variant_builder_add (builder, "{sv}", "desktop-startup-id",
g_variant_new_string (startup_id));
}
static void
gtk_application_before_emit (GApplication *g_application,
GVariant *platform_data)
{
GtkApplication *application = GTK_APPLICATION (g_application);
gdk_threads_enter ();
gtk_application_impl_before_emit (application->priv->impl, platform_data);
}
static void
gtk_application_after_emit (GApplication *application,
GVariant *platform_data)
{
gdk_notify_startup_complete ();
gdk_threads_leave ();
}
static void
gtk_application_init (GtkApplication *application)
{
application->priv = gtk_application_get_instance_private (application);
application->priv->muxer = gtk_action_muxer_new ();
accels_init (&application->priv->accels);
}
static void
gtk_application_window_added (GtkApplication *application,
GtkWindow *window)
{
GtkApplicationPrivate *priv = application->priv;
if (GTK_IS_APPLICATION_WINDOW (window))
gtk_application_window_set_id (GTK_APPLICATION_WINDOW (window), ++application->priv->last_window_id);
priv->windows = g_list_prepend (priv->windows, window);
gtk_window_set_application (window, application);
g_application_hold (G_APPLICATION (application));
g_signal_connect (window, "focus-in-event",
G_CALLBACK (gtk_application_focus_in_event_cb),
application);
gtk_application_impl_window_added (application->priv->impl, window);
gtk_application_impl_active_window_changed (application->priv->impl, window);
g_object_notify (G_OBJECT (application), "active-window");
}
static void
gtk_application_window_removed (GtkApplication *application,
GtkWindow *window)
{
GtkApplicationPrivate *priv = application->priv;
gpointer old_active;
old_active = priv->windows;
gtk_application_impl_window_removed (application->priv->impl, window);
g_signal_handlers_disconnect_by_func (window,
gtk_application_focus_in_event_cb,
application);
g_application_release (G_APPLICATION (application));
priv->windows = g_list_remove (priv->windows, window);
gtk_window_set_application (window, NULL);
if (priv->windows != old_active)
{
gtk_application_impl_active_window_changed (application->priv->impl, priv->windows ? priv->windows->data : NULL);
g_object_notify (G_OBJECT (application), "active-window");
}
}
static void
extract_accel_from_menu_item (GMenuModel *model,
gint item,
GtkApplication *app)
{
GMenuAttributeIter *iter;
const gchar *key;
GVariant *value;
const gchar *accel = NULL;
const gchar *action = NULL;
GVariant *target = NULL;
iter = g_menu_model_iterate_item_attributes (model, item);
while (g_menu_attribute_iter_get_next (iter, &key, &value))
{
if (g_str_equal (key, "action") && g_variant_is_of_type (value, G_VARIANT_TYPE_STRING))
action = g_variant_get_string (value, NULL);
else if (g_str_equal (key, "accel") && g_variant_is_of_type (value, G_VARIANT_TYPE_STRING))
accel = g_variant_get_string (value, NULL);
else if (g_str_equal (key, "target"))
target = g_variant_ref (value);
g_variant_unref (value);
}
g_object_unref (iter);
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
if (accel && action)
gtk_application_add_accelerator (app, accel, action, target);
G_GNUC_END_IGNORE_DEPRECATIONS
if (target)
g_variant_unref (target);
}
static void
extract_accels_from_menu (GMenuModel *model,
GtkApplication *app)
{
gint i;
GMenuLinkIter *iter;
const gchar *key;
GMenuModel *m;
for (i = 0; i < g_menu_model_get_n_items (model); i++)
{
extract_accel_from_menu_item (model, i, app);
iter = g_menu_model_iterate_item_links (model, i);
while (g_menu_link_iter_get_next (iter, &key, &m))
{
extract_accels_from_menu (m, app);
g_object_unref (m);
}
g_object_unref (iter);
}
}
static void
gtk_application_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkApplication *application = GTK_APPLICATION (object);
switch (prop_id)
{
case PROP_REGISTER_SESSION:
g_value_set_boolean (value, application->priv->register_session);
break;
case PROP_APP_MENU:
g_value_set_object (value, gtk_application_get_app_menu (application));
break;
case PROP_MENUBAR:
g_value_set_object (value, gtk_application_get_menubar (application));
break;
case PROP_ACTIVE_WINDOW:
g_value_set_object (value, gtk_application_get_active_window (application));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_application_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkApplication *application = GTK_APPLICATION (object);
switch (prop_id)
{
case PROP_REGISTER_SESSION:
application->priv->register_session = g_value_get_boolean (value);
break;
case PROP_APP_MENU:
gtk_application_set_app_menu (application, g_value_get_object (value));
break;
case PROP_MENUBAR:
gtk_application_set_menubar (application, g_value_get_object (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_application_finalize (GObject *object)
{
GtkApplication *application = GTK_APPLICATION (object);
g_clear_object (&application->priv->menus_builder);
g_clear_object (&application->priv->app_menu);
g_clear_object (&application->priv->menubar);
g_clear_object (&application->priv->muxer);
accels_finalize (&application->priv->accels);
G_OBJECT_CLASS (gtk_application_parent_class)
->finalize (object);
}
static void
gtk_application_class_init (GtkApplicationClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
GApplicationClass *application_class = G_APPLICATION_CLASS (class);
object_class->get_property = gtk_application_get_property;
object_class->set_property = gtk_application_set_property;
object_class->finalize = gtk_application_finalize;
application_class->local_command_line = gtk_application_local_command_line;
application_class->add_platform_data = gtk_application_add_platform_data;
application_class->before_emit = gtk_application_before_emit;
application_class->after_emit = gtk_application_after_emit;
application_class->startup = gtk_application_startup;
application_class->shutdown = gtk_application_shutdown;
class->window_added = gtk_application_window_added;
class->window_removed = gtk_application_window_removed;
/**
* GtkApplication::window-added:
* @application: the #GtkApplication which emitted the signal
* @window: the newly-added #GtkWindow
*
* Emitted when a #GtkWindow is added to @application through
* gtk_application_add_window().
*
* Since: 3.2
*/
gtk_application_signals[WINDOW_ADDED] =
g_signal_new ("window-added", GTK_TYPE_APPLICATION, G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkApplicationClass, window_added),
NULL, NULL,
g_cclosure_marshal_VOID__OBJECT,
G_TYPE_NONE, 1, GTK_TYPE_WINDOW);
/**
* GtkApplication::window-removed:
* @application: the #GtkApplication which emitted the signal
* @window: the #GtkWindow that is being removed
*
* Emitted when a #GtkWindow is removed from @application,
* either as a side-effect of being destroyed or explicitly
* through gtk_application_remove_window().
*
* Since: 3.2
*/
gtk_application_signals[WINDOW_REMOVED] =
g_signal_new ("window-removed", GTK_TYPE_APPLICATION, G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkApplicationClass, window_removed),
NULL, NULL,
g_cclosure_marshal_VOID__OBJECT,
G_TYPE_NONE, 1, GTK_TYPE_WINDOW);
/**
* GtkApplication:register-session:
*
* Set this property to %TRUE to register with the session manager.
*
* Since: 3.4
*/
g_object_class_install_property (object_class, PROP_REGISTER_SESSION,
g_param_spec_boolean ("register-session",
P_("Register session"),
P_("Register with the session manager"),
FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_APP_MENU,
g_param_spec_object ("app-menu",
P_("Application menu"),
P_("The GMenuModel for the application menu"),
G_TYPE_MENU_MODEL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_MENUBAR,
g_param_spec_object ("menubar",
P_("Menubar"),
P_("The GMenuModel for the menubar"),
G_TYPE_MENU_MODEL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_ACTIVE_WINDOW,
g_param_spec_object ("active-window",
P_("Active window"),
P_("The window which most recently had focus"),
GTK_TYPE_WINDOW,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
}
/**
* gtk_application_new:
* @application_id: (allow-none): The application ID.
* @flags: the application flags
*
* Creates a new #GtkApplication instance.
*
* When using #GtkApplication, it is not necessary to call gtk_init()
* manually. It is called as soon as the application gets registered as
* the primary instance.
*
* Concretely, gtk_init() is called in the default handler for the
* #GApplication::startup signal. Therefore, #GtkApplication subclasses should
* chain up in their #GApplication::startup handler before using any GTK+ API.
*
* Note that commandline arguments are not passed to gtk_init().
* All GTK+ functionality that is available via commandline arguments
* can also be achieved by setting suitable environment variables
* such as `G_DEBUG`, so this should not be a big
* problem. If you absolutely must support GTK+ commandline arguments,
* you can explicitly call gtk_init() before creating the application
* 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 (most notably application
* uniqueness) will be disabled. A null application ID is only allowed with
* GTK+ 3.6 or later.
*
* Returns: a new #GtkApplication instance
*
* Since: 3.0
*/
GtkApplication *
gtk_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 (GTK_TYPE_APPLICATION,
"application-id", application_id,
"flags", flags,
NULL);
}
/**
* gtk_application_add_window:
* @application: a #GtkApplication
* @window: a #GtkWindow
*
* Adds a window to @application.
*
* This call is equivalent to setting the #GtkWindow:application
* property of @window to @application.
*
* Normally, the connection between the application and the window
* will remain until the window is destroyed, but you can explicitly
* remove it with gtk_application_remove_window().
*
* GTK+ will keep the application running as long as it has
* any windows.
*
* Since: 3.0
**/
void
gtk_application_add_window (GtkApplication *application,
GtkWindow *window)
{
g_return_if_fail (GTK_IS_APPLICATION (application));
if (!g_list_find (application->priv->windows, window))
g_signal_emit (application,
gtk_application_signals[WINDOW_ADDED], 0, window);
}
/**
* gtk_application_remove_window:
* @application: a #GtkApplication
* @window: a #GtkWindow
*
* Remove a window from @application.
*
* If @window belongs to @application then this call is equivalent to
* setting the #GtkWindow:application property of @window to
* %NULL.
*
* The application may stop running as a result of a call to this
* function.
*
* Since: 3.0
**/
void
gtk_application_remove_window (GtkApplication *application,
GtkWindow *window)
{
g_return_if_fail (GTK_IS_APPLICATION (application));
if (g_list_find (application->priv->windows, window))
g_signal_emit (application,
gtk_application_signals[WINDOW_REMOVED], 0, window);
}
/**
* gtk_application_get_windows:
* @application: a #GtkApplication
*
* Gets a list of the #GtkWindows associated with @application.
*
* The list is sorted by most recently focused window, such that the first
* element is the currently focused window. (Useful for choosing a parent
* for a transient window.)
*
* The list that is returned should not be modified in any way. It will
* only remain valid until the next focus change or window creation or
* deletion.
*
* Returns: (element-type GtkWindow) (transfer none): a #GList of #GtkWindow
*
* Since: 3.0
**/
GList *
gtk_application_get_windows (GtkApplication *application)
{
g_return_val_if_fail (GTK_IS_APPLICATION (application), NULL);
return application->priv->windows;
}
/**
* gtk_application_get_window_by_id:
* @application: a #GtkApplication
* @id: an identifier number
*
* Returns the #GtkApplicationWindow with the given ID.
*
* Returns: (transfer none): the window with ID @id, or
* %NULL if there is no window with this ID
*
* Since: 3.6
*/
GtkWindow *
gtk_application_get_window_by_id (GtkApplication *application,
guint id)
{
GList *l;
g_return_val_if_fail (GTK_IS_APPLICATION (application), NULL);
for (l = application->priv->windows; l != NULL; l = l->next)
{
if (GTK_IS_APPLICATION_WINDOW (l->data) &&
gtk_application_window_get_id (GTK_APPLICATION_WINDOW (l->data)) == id)
return l->data;
}
return NULL;
}
/**
* gtk_application_get_active_window:
* @application: a #GtkApplication
*
* Gets the “active” window for the application.
*
* The active window is the one that was most recently focused (within
* the application). This window may not have the focus at the moment
* if another application has it -- this is just the most
* recently-focused window within this application.
*
* Returns: (transfer none): the active window
*
* Since: 3.6
**/
GtkWindow *
gtk_application_get_active_window (GtkApplication *application)
{
g_return_val_if_fail (GTK_IS_APPLICATION (application), NULL);
return application->priv->windows ? application->priv->windows->data : NULL;
}
static void
gtk_application_update_accels (GtkApplication *application)
{
GList *l;
for (l = application->priv->windows; l != NULL; l = l->next)
_gtk_window_notify_keys_changed (l->data);
}
/**
* gtk_application_add_accelerator:
* @application: a #GtkApplication
* @accelerator: accelerator string
* @action_name: the name of the action to activate
* @parameter: (allow-none): parameter to pass when activating the action,
* or %NULL if the action does not accept an activation parameter
*
* Installs an accelerator that will cause the named action
* to be activated when the key combination specificed by @accelerator
* is pressed.
*
* @accelerator must be a string that can be parsed by gtk_accelerator_parse(),
* e.g. "<Primary>q" or “<Control><Alt>p”.
*
* @action_name must be the name of an action as it would be used
* in the app menu, i.e. actions that have been added to the application
* are referred to with an “app.” prefix, and window-specific actions
* with a “win.” prefix.
*
* GtkApplication also extracts accelerators out of “accel” attributes
* in the #GMenuModels passed to gtk_application_set_app_menu() and
* gtk_application_set_menubar(), which is usually more convenient
* than calling this function for each accelerator.
*
* Since: 3.4
*
* Deprecated: 3.14: Use gtk_application_set_accels_for_action() instead
*/
void
gtk_application_add_accelerator (GtkApplication *application,
const gchar *accelerator,
const gchar *action_name,
GVariant *parameter)
{
const gchar *accelerators[2] = { accelerator, NULL };
gchar *action_and_target;
g_return_if_fail (GTK_IS_APPLICATION (application));
g_return_if_fail (action_name != NULL);
g_return_if_fail (accelerator != NULL);
action_and_target = gtk_print_action_and_target (NULL, action_name, parameter);
accels_set_accels_for_action (&application->priv->accels, action_and_target, accelerators);
gtk_action_muxer_set_primary_accel (application->priv->muxer, action_and_target, accelerator);
gtk_application_update_accels (application);
g_free (action_and_target);
}
/**
* gtk_application_remove_accelerator:
* @application: a #GtkApplication
* @action_name: the name of the action to activate
* @parameter: (allow-none): parameter to pass when activating the action,
* or %NULL if the action does not accept an activation parameter
*
* Removes an accelerator that has been previously added
* with gtk_application_add_accelerator().
*
* Since: 3.4
*
* Deprecated: 3.14: Use gtk_application_set_accels_for_action() instead
*/
void
gtk_application_remove_accelerator (GtkApplication *application,
const gchar *action_name,
GVariant *parameter)
{
gchar *action_and_target;
g_return_if_fail (GTK_IS_APPLICATION (application));
g_return_if_fail (action_name != NULL);
action_and_target = gtk_print_action_and_target (NULL, action_name, parameter);
accels_set_accels_for_action (&application->priv->accels, action_and_target, NULL);
gtk_action_muxer_set_primary_accel (application->priv->muxer, action_and_target, NULL);
gtk_application_update_accels (application);
g_free (action_and_target);
}
/**
* gtk_application_prefers_app_menu:
* @application: a #GtkApplication
*
* Determines if the desktop environment in which the application is
* running would prefer an application menu be shown.
*
* If this function returns %TRUE then the application should call
* gtk_application_set_app_menu() with the contents of an application
* menu, which will be shown by the desktop environment. If it returns
* %FALSE then you should consider using an alternate approach, such as
* a menubar.
*
* The value returned by this function is purely advisory and you are
* free to ignore it. If you call gtk_application_set_app_menu() even
* if the desktop environment doesn't support app menus, then a fallback
* will be provided.
*
* Applications are similarly free not to set an app menu even if the
* desktop environment wants to show one. In that case, a fallback will
* also be created by the desktop environment (GNOME, for example, uses
* a menu with only a "Quit" item in it).
*
* The value returned by this function never changes. Once it returns a
* particular value, it is guaranteed to always return the same value.
*
* You may only call this function after the application has been
* registered and after the base startup handler has run. You're most
* likely to want to use this from your own startup handler. It may
* also make sense to consult this function while constructing UI (in
* activate, open or an action activation handler) in order to determine
* if you should show a gear menu or not.
*
* This function will return %FALSE on Mac OS and a default app menu
* will be created automatically with the "usual" contents of that menu
* typical to most Mac OS applications. If you call
* gtk_application_set_app_menu() anyway, then this menu will be
* replaced with your own.
*
* Returns: %TRUE if you should set an app menu
*
* Since: 3.14
**/
gboolean
gtk_application_prefers_app_menu (GtkApplication *application)
{
g_return_val_if_fail (application->priv->impl != NULL, FALSE);
return gtk_application_impl_prefers_app_menu (application->priv->impl);
}
/**
* gtk_application_set_app_menu:
* @application: a #GtkApplication
* @app_menu: (allow-none): a #GMenuModel, or %NULL
*
* Sets or unsets the application menu for @application.
*
* This can only be done in the primary instance of the application,
* after it has been registered. #GApplication::startup is a good place
* to call this.
*
* The application menu is a single menu containing items that typically
* impact the application as a whole, rather than acting on a specific
* window or document. For example, you would expect to see
* “Preferences” or “Quit” in an application menu, but not “Save” or
* “Print”.
*
* If supported, the application menu will be rendered by the desktop
* environment.
*
* Use the base #GActionMap interface to add actions, to respond to the user
* selecting these menu items.
*
* Since: 3.4
*/
void
gtk_application_set_app_menu (GtkApplication *application,
GMenuModel *app_menu)
{
g_return_if_fail (GTK_IS_APPLICATION (application));
g_return_if_fail (g_application_get_is_registered (G_APPLICATION (application)));
g_return_if_fail (!g_application_get_is_remote (G_APPLICATION (application)));
if (app_menu != application->priv->app_menu)
{
if (application->priv->app_menu != NULL)
g_object_unref (application->priv->app_menu);
application->priv->app_menu = app_menu;
if (application->priv->app_menu != NULL)
g_object_ref (application->priv->app_menu);
if (app_menu)
extract_accels_from_menu (app_menu, application);
gtk_application_impl_set_app_menu (application->priv->impl, app_menu);
g_object_notify (G_OBJECT (application), "app-menu");
}
}
/**
* gtk_application_get_app_menu:
* @application: a #GtkApplication
*
* Returns the menu model that has been set with
* gtk_application_set_app_menu().
*
* Returns: (transfer none): the application menu of @application
*
* Since: 3.4
*/
GMenuModel *
gtk_application_get_app_menu (GtkApplication *application)
{
g_return_val_if_fail (GTK_IS_APPLICATION (application), NULL);
return application->priv->app_menu;
}
/**
* gtk_application_set_menubar:
* @application: a #GtkApplication
* @menubar: (allow-none): a #GMenuModel, or %NULL
*
* Sets or unsets the menubar for windows of @application.
*
* This is a menubar in the traditional sense.
*
* This can only be done in the primary instance of the application,
* after it has been registered. #GApplication::startup is a good place
* to call this.
*
* Depending on the desktop environment, this may appear at the top of
* each window, or at the top of the screen. In some environments, if
* both the application menu and the menubar are set, the application
* menu will be presented as if it were the first item of the menubar.
* Other environments treat the two as completely separate -- for
* example, the application menu may be rendered by the desktop shell
* while the menubar (if set) remains in each individual window.
*
* Use the base #GActionMap interface to add actions, to respond to the user
* selecting these menu items.
*
* Since: 3.4
*/
void
gtk_application_set_menubar (GtkApplication *application,
GMenuModel *menubar)
{
g_return_if_fail (GTK_IS_APPLICATION (application));
g_return_if_fail (g_application_get_is_registered (G_APPLICATION (application)));
g_return_if_fail (!g_application_get_is_remote (G_APPLICATION (application)));
if (menubar != application->priv->menubar)
{
if (application->priv->menubar != NULL)
g_object_unref (application->priv->menubar);
application->priv->menubar = menubar;
if (application->priv->menubar != NULL)
g_object_ref (application->priv->menubar);
if (menubar)
extract_accels_from_menu (menubar, application);
gtk_application_impl_set_menubar (application->priv->impl, menubar);
g_object_notify (G_OBJECT (application), "menubar");
}
}
/**
* gtk_application_get_menubar:
* @application: a #GtkApplication
*
* Returns the menu model that has been set with
* gtk_application_set_menubar().
*
* Returns: (transfer none): the menubar for windows of @application
*
* Since: 3.4
*/
GMenuModel *
gtk_application_get_menubar (GtkApplication *application)
{
g_return_val_if_fail (GTK_IS_APPLICATION (application), NULL);
return application->priv->menubar;
}
/**
* GtkApplicationInhibitFlags:
* @GTK_APPLICATION_INHIBIT_LOGOUT: Inhibit ending the user session
* by logging out or by shutting down the computer
* @GTK_APPLICATION_INHIBIT_SWITCH: Inhibit user switching
* @GTK_APPLICATION_INHIBIT_SUSPEND: Inhibit suspending the
* session or computer
* @GTK_APPLICATION_INHIBIT_IDLE: Inhibit the session being
* marked as idle (and possibly locked)
*
* Types of user actions that may be blocked by gtk_application_inhibit().
*
* Since: 3.4
*/
/**
* gtk_application_inhibit:
* @application: the #GtkApplication
* @window: (allow-none): a #GtkWindow, or %NULL
* @flags: what types of actions should be inhibited
* @reason: (allow-none): a short, human-readable string that explains
* why these operations are inhibited
*
* Inform the session manager that certain types of actions should be
* inhibited. This is not guaranteed to work on all platforms and for
* all types of actions.
*
* Applications should invoke this method when they begin an operation
* that should not be interrupted, such as creating a CD or DVD. The
* types of actions that may be blocked are specified by the @flags
* parameter. When the application completes the operation it should
* call gtk_application_uninhibit() to remove the inhibitor. Note that
* an application can have multiple inhibitors, and all of the must
* be individually removed. Inhibitors are also cleared when the
* application exits.
*
* Applications should not expect that they will always be able to block
* the action. In most cases, users will be given the option to force
* the action to take place.
*
* Reasons should be short and to the point.
*
* If @window is given, the session manager may point the user to
* this window to find out more about why the action is inhibited.
*
* Returns: A non-zero cookie that is used to uniquely identify this
* request. It should be used as an argument to gtk_application_uninhibit()
* in order to remove the request. If the platform does not support
* inhibiting or the request failed for some reason, 0 is returned.
*
* Since: 3.4
*/
guint
gtk_application_inhibit (GtkApplication *application,
GtkWindow *window,
GtkApplicationInhibitFlags flags,
const gchar *reason)
{
g_return_val_if_fail (GTK_IS_APPLICATION (application), 0);
g_return_val_if_fail (!g_application_get_is_remote (G_APPLICATION (application)), 0);
return gtk_application_impl_inhibit (application->priv->impl, window, flags, reason);
}
/**
* gtk_application_uninhibit:
* @application: the #GtkApplication
* @cookie: a cookie that was returned by gtk_application_inhibit()
*
* Removes an inhibitor that has been established with gtk_application_inhibit().
* Inhibitors are also cleared when the application exits.
*
* Since: 3.4
*/
void
gtk_application_uninhibit (GtkApplication *application,
guint cookie)
{
g_return_if_fail (GTK_IS_APPLICATION (application));
g_return_if_fail (!g_application_get_is_remote (G_APPLICATION (application)));
g_return_if_fail (cookie > 0);
gtk_application_impl_uninhibit (application->priv->impl, cookie);
}
/**
* gtk_application_is_inhibited:
* @application: the #GtkApplication
* @flags: what types of actions should be queried
*
* Determines if any of the actions specified in @flags are
* currently inhibited (possibly by another application).
*
* Returns: %TRUE if any of the actions specified in @flags are inhibited
*
* Since: 3.4
*/
gboolean
gtk_application_is_inhibited (GtkApplication *application,
GtkApplicationInhibitFlags flags)
{
g_return_val_if_fail (GTK_IS_APPLICATION (application), FALSE);
g_return_val_if_fail (!g_application_get_is_remote (G_APPLICATION (application)), FALSE);
return gtk_application_impl_is_inhibited (application->priv->impl, flags);
}
GtkActionMuxer *
gtk_application_get_parent_muxer_for_window (GtkWindow *window)
{
GtkApplication *application;
application = gtk_window_get_application (window);
if (!application)
return NULL;
return application->priv->muxer;
}
gboolean
gtk_application_activate_accel (GtkApplication *application,
GActionGroup *action_group,
guint key,
GdkModifierType modifier)
{
return accels_activate (&application->priv->accels, action_group, key, modifier);
}
void
gtk_application_foreach_accel_keys (GtkApplication *application,
GtkWindow *window,
GtkWindowKeysForeachFunc callback,
gpointer user_data)
{
accels_foreach_key (&application->priv->accels, window, callback, user_data);
}
/**
* gtk_application_list_action_descriptions:
* @application: a #GtkApplication
*
* Lists the detailed action names which have associated accelerators.
* See gtk_application_set_accels_for_action().
*
* Returns: (transfer full): a %NULL-terminated array of strings,
* free with g_strfreev() when done
*
* Since: 3.12
*/
gchar **
gtk_application_list_action_descriptions (GtkApplication *application)
{
GHashTableIter iter;
gchar **result;
gint n, i = 0;
gpointer key;
n = g_hash_table_size (application->priv->accels.action_to_accels);
result = g_new (gchar *, n + 1);
g_hash_table_iter_init (&iter, application->priv->accels.action_to_accels);
while (g_hash_table_iter_next (&iter, &key, NULL))
{
const gchar *action_and_target = key;
const gchar *sep;
GVariant *target;
sep = strrchr (action_and_target, '|');
target = g_variant_parse (NULL, action_and_target, sep, NULL, NULL);
result[i++] = g_action_print_detailed_name (sep + 1, target);
if (target)
g_variant_unref (target);
}
g_assert_cmpint (i, ==, n);
result[i] = NULL;
return result;
}
gchar *
normalise_detailed_name (const gchar *detailed_action_name)
{
GError *error = NULL;
gchar *action_and_target;
gchar *action_name;
GVariant *target;
g_action_parse_detailed_name (detailed_action_name, &action_name, &target, &error);
g_assert_no_error (error);
action_and_target = gtk_print_action_and_target (NULL, action_name, target);
if (target)
g_variant_unref (target);
g_free (action_name);
return action_and_target;
}
/**
* gtk_application_set_accels_for_action:
* @application: a #GtkApplication
* @detailed_action_name: a detailed action name, specifying an action
* and target to associate accelerators with
* @accels: (array zero-terminated=1): a list of accelerators in the format understood by
* gtk_accelerator_parse()
*
* Sets zero or more keyboard accelerators that will trigger the
* given action. The first item in @accels will be the primary
* accelerator, which may be displayed in the UI.
*
* To remove all accelerators for an action, use an empty, zero-terminated
* array for @accels.
*
* Since: 3.12
*/
void
gtk_application_set_accels_for_action (GtkApplication *application,
const gchar *detailed_action_name,
const gchar * const *accels)
{
gchar *action_and_target;
g_return_if_fail (GTK_IS_APPLICATION (application));
g_return_if_fail (detailed_action_name != NULL);
action_and_target = normalise_detailed_name (detailed_action_name);
accels_set_accels_for_action (&application->priv->accels, action_and_target, accels);
gtk_action_muxer_set_primary_accel (application->priv->muxer, action_and_target, accels[0]);
gtk_application_update_accels (application);
g_free (action_and_target);
}
/**
* gtk_application_get_accels_for_action:
* @application: a #GtkApplication
* @detailed_action_name: a detailed action name, specifying an action
* and target to obtain accelerators for
*
* Gets the accelerators that are currently associated with
* the given action.
*
* Returns: (transfer full): accelerators for @detailed_action_name, as
* a %NULL-terminated array. Free with g_strfreev() when no longer needed
*
* Since: 3.12
*/
gchar **
gtk_application_get_accels_for_action (GtkApplication *application,
const gchar *detailed_action_name)
{
gchar *action_and_target;
gchar **accels;
g_return_val_if_fail (GTK_IS_APPLICATION (application), NULL);
g_return_val_if_fail (detailed_action_name != NULL, NULL);
action_and_target = normalise_detailed_name (detailed_action_name);
accels = accels_get_accels_for_action (&application->priv->accels, action_and_target);
g_free (action_and_target);
return accels;
}
GtkActionMuxer *
gtk_application_get_action_muxer (GtkApplication *application)
{
g_assert (application->priv->muxer);
return application->priv->muxer;
}
void
gtk_application_insert_action_group (GtkApplication *application,
const gchar *name,
GActionGroup *action_group)
{
gtk_action_muxer_insert (application->priv->muxer, name, action_group);
}
void
gtk_application_handle_window_realize (GtkApplication *application,
GtkWindow *window)
{
gtk_application_impl_handle_window_realize (application->priv->impl, window);
}
void
gtk_application_handle_window_map (GtkApplication *application,
GtkWindow *window)
{
gtk_application_impl_handle_window_map (application->priv->impl, window);
}
/**
* gtk_application_get_menu_by_id:
* @application: a #GtkApplication
* @id: the id of the menu to look up
*
* Gets a menu from automatically loaded resources.
* See [Automatic resources][automatic-resources]
* for more information.
*
* Returns: (transfer full): Gets the menu with the
* given id from the automatically loaded resources
*
* Since: 3.14
*/
GMenu *
gtk_application_get_menu_by_id (GtkApplication *application,
const gchar *id)
{
GObject *object;
if (!application->priv->menus_builder)
return NULL;
object = gtk_builder_get_object (application->priv->menus_builder, id);
if (!object || !G_IS_MENU (object))
return NULL;
return G_MENU (object);
}
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