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gtk2/gtk/gtkapplication.c

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/*
* Copyright © 2010 Codethink 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* 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 "gtkmarshalers.h"
#include "gtkmain.h"
#include "gtkaccelmapprivate.h"
#include "gactionmuxer.h"
#ifdef GDK_WINDOWING_QUARTZ
#include "gtkquartz-menu.h"
#import <Cocoa/Cocoa.h>
#endif
#include <gdk/gdk.h>
#ifdef GDK_WINDOWING_X11
#include <gdk/x11/gdkx.h>
#endif
/**
* 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, 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.
*
* To set an application menu on a GtkApplication, use
* g_application_set_app_menu(). The #GMenuModel that this function
* expects is usually constructed using #GtkBuilder, as seen in the
* following example. To set a menubar that will be automatically picked
* up by #GApplicationWindows, use g_application_set_menubar(). GTK+
* makes these menus appear as expected, depending on the platform
* the application is running on.
*
* <figure label="Menu integration in OS X">
* <graphic fileref="bloatpad-osx.png" format="PNG"/>
* </figure>
*
* <figure label="Menu integration in GNOME">
* <graphic fileref="bloatpad-gnome.png" format="PNG"/>
* </figure>
*
* <example id="gtkapplication"><title>A simple application</title>
* <programlisting>
* <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../examples/bloatpad.c">
* <xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback>
* </xi:include>
* </programlisting>
* </example>
*/
enum {
WINDOW_ADDED,
WINDOW_REMOVED,
LAST_SIGNAL
};
static guint gtk_application_signals[LAST_SIGNAL];
G_DEFINE_TYPE (GtkApplication, gtk_application, G_TYPE_APPLICATION)
struct _GtkApplicationPrivate
{
GList *windows;
#ifdef GDK_WINDOWING_X11
GDBusConnection *session;
gchar *window_prefix;
guint next_id;
#endif
#ifdef GDK_WINDOWING_QUARTZ
GActionMuxer *muxer;
GMenu *combined;
#endif
};
#ifdef GDK_WINDOWING_X11
static void
gtk_application_window_added_x11 (GtkApplication *application,
GtkWindow *window)
{
if (application->priv->session == NULL)
return;
if (GTK_IS_APPLICATION_WINDOW (window))
{
GtkApplicationWindow *app_window = GTK_APPLICATION_WINDOW (window);
gboolean success;
/* GtkApplicationWindow associates with us when it is first created,
* so surely it's not realized yet...
*/
g_assert (!gtk_widget_get_realized (GTK_WIDGET (window)));
do
{
gchar *window_path;
guint window_id;
window_id = application->priv->next_id++;
window_path = g_strdup_printf ("%s%d", application->priv->window_prefix, window_id);
success = gtk_application_window_publish (app_window, application->priv->session, window_path);
g_free (window_path);
}
while (!success);
}
}
static void
gtk_application_window_removed_x11 (GtkApplication *application,
GtkWindow *window)
{
if (application->priv->session == NULL)
return;
if (GTK_IS_APPLICATION_WINDOW (window))
gtk_application_window_unpublish (GTK_APPLICATION_WINDOW (window));
}
static gchar *
window_prefix_from_appid (const gchar *appid)
{
gchar *appid_path, *iter;
appid_path = g_strconcat ("/", appid, "/windows/", NULL);
for (iter = appid_path; *iter; iter++)
{
if (*iter == '.')
*iter = '/';
if (*iter == '-')
*iter = '_';
}
return appid_path;
}
static void
gtk_application_startup_x11 (GtkApplication *application)
{
const gchar *application_id;
application_id = g_application_get_application_id (G_APPLICATION (application));
application->priv->session = g_bus_get_sync (G_BUS_TYPE_SESSION, NULL, NULL);
application->priv->window_prefix = window_prefix_from_appid (application_id);
}
static void
gtk_application_shutdown_x11 (GtkApplication *application)
{
g_free (application->priv->window_prefix);
application->priv->window_prefix = NULL;
if (application->priv->session)
{
g_object_unref (application->priv->session);
application->priv->session = NULL;
}
}
#endif
#ifdef GDK_WINDOWING_QUARTZ
static void
gtk_application_menu_changed_quartz (GObject *object,
GParamSpec *pspec,
gpointer user_data)
{
GtkApplication *application = GTK_APPLICATION (object);
GMenu *combined;
combined = g_menu_new ();
g_menu_append_submenu (combined, "Application", g_application_get_app_menu (G_APPLICATION (object)));
g_menu_append_section (combined, NULL, g_application_get_menubar (G_APPLICATION (object)));
gtk_quartz_set_main_menu (G_MENU_MODEL (combined), G_ACTION_OBSERVABLE (application->priv->muxer));
}
static void
gtk_application_startup_quartz (GtkApplication *application)
{
[NSApp finishLaunching];
application->priv->muxer = g_action_muxer_new ();
g_action_muxer_insert (application->priv->muxer, "app", G_ACTION_GROUP (application));
g_signal_connect (application, "notify::app-menu", G_CALLBACK (gtk_application_menu_changed_quartz), NULL);
g_signal_connect (application, "notify::menubar", G_CALLBACK (gtk_application_menu_changed_quartz), NULL);
gtk_application_menu_changed_quartz (G_OBJECT (application), NULL, NULL);
}
static void
gtk_application_shutdown_quartz (GtkApplication *application)
{
g_signal_handlers_disconnect_by_func (application, gtk_application_menu_changed_quartz, NULL);
g_object_unref (application->priv->muxer);
application->priv->muxer = NULL;
}
static void
gtk_application_focus_changed (GtkApplication *application,
GtkWindow *window)
{
if (G_IS_ACTION_GROUP (window))
g_action_muxer_insert (application->priv->muxer, "win", G_ACTION_GROUP (window));
else
g_action_muxer_remove (application->priv->muxer, "win");
}
#endif
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);
}
#ifdef GDK_WINDOWING_QUARTZ
gtk_application_focus_changed (application, window);
#endif
return FALSE;
}
static void
gtk_application_startup (GApplication *application)
{
G_APPLICATION_CLASS (gtk_application_parent_class)
->startup (application);
gtk_init (0, 0);
#ifdef GDK_WINDOWING_X11
gtk_application_startup_x11 (GTK_APPLICATION (application));
#endif
#ifdef GDK_WINDOWING_QUARTZ
gtk_application_startup_quartz (GTK_APPLICATION (application));
#endif
}
static void
gtk_application_shutdown (GApplication *application)
{
#ifdef GDK_WINDOWING_X11
gtk_application_shutdown_x11 (GTK_APPLICATION (application));
#endif
#ifdef GDK_WINDOWING_QUARTZ
gtk_application_shutdown_quartz (GTK_APPLICATION (application));
#endif
G_APPLICATION_CLASS (gtk_application_parent_class)
->shutdown (application);
}
static void
gtk_application_add_platform_data (GApplication *application,
GVariantBuilder *builder)
{
const gchar *startup_id;
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 *application,
GVariant *platform_data)
{
GVariantIter iter;
const gchar *key;
GVariant *value;
gdk_threads_enter ();
g_variant_iter_init (&iter, platform_data);
while (g_variant_iter_loop (&iter, "{&sv}", &key, &value))
{
#ifdef GDK_WINDOWING_X11
if (strcmp (key, "desktop-startup-id") == 0)
{
GdkDisplay *display;
const gchar *id;
display = gdk_display_get_default ();
id = g_variant_get_string (value, NULL);
if (GDK_IS_X11_DISPLAY (display))
gdk_x11_display_set_startup_notification_id (display, id);
}
#endif
}
}
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 = G_TYPE_INSTANCE_GET_PRIVATE (application,
GTK_TYPE_APPLICATION,
GtkApplicationPrivate);
}
static void
gtk_application_window_added (GtkApplication *application,
GtkWindow *window)
{
GtkApplicationPrivate *priv = application->priv;
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);
#ifdef GDK_WINDOWING_X11
gtk_application_window_added_x11 (application, window);
#endif
}
static void
gtk_application_window_removed (GtkApplication *application,
GtkWindow *window)
{
GtkApplicationPrivate *priv = application->priv;
#ifdef GDK_WINDOWING_X11
gtk_application_window_removed_x11 (application, window);
#endif
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);
}
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);
if (accel && action)
gtk_application_add_accelerator (app, accel, action, target);
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_notify (GObject *object,
GParamSpec *pspec)
{
if (strcmp (pspec->name, "app-menu") == 0 ||
strcmp (pspec->name, "menubar") == 0)
{
GMenuModel *model;
g_object_get (object, pspec->name, &model, NULL);
if (model)
{
extract_accels_from_menu (model, GTK_APPLICATION (object));
g_object_unref (model);
}
}
if (G_OBJECT_CLASS (gtk_application_parent_class)->notify)
G_OBJECT_CLASS (gtk_application_parent_class)->notify (object, pspec);
}
static void
gtk_application_class_init (GtkApplicationClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
GApplicationClass *application_class = G_APPLICATION_CLASS (class);
object_class->notify = gtk_application_notify;
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;
g_type_class_add_private (class, sizeof (GtkApplicationPrivate));
/**
* 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);
}
/**
* gtk_application_new:
* @application_id: the application id
* @flags: the application flags
*
* Creates a new #GtkApplication instance.
*
* This function calls g_type_init() for you. gtk_init() is called
* as soon as the application gets registered as the primary instance.
*
* 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 <envvar>G_DEBUG</envvar>, 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.
*
* The application id must be valid. See g_application_id_is_valid().
*
* Returns: a new #GtkApplication instance
*/
GtkApplication *
gtk_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 (GTK_TYPE_APPLICATION,
"application-id", application_id,
"flags", flags,
NULL);
}
/**
* gtk_application_add_window:
* @application: a #GtkApplication
* @window: a #GtkWindow
*
* Adds a window from @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_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 g_application_set_app_menu() and
* g_application_set_menubar(), which is usually more convenient
* than calling this function for each accelerator.
*
* Since: 3.4
*/
void
gtk_application_add_accelerator (GtkApplication *application,
const gchar *accelerator,
const gchar *action_name,
GVariant *parameter)
{
gchar *accel_path;
guint accel_key;
GdkModifierType accel_mods;
g_return_if_fail (GTK_IS_APPLICATION (application));
/* Call this here, since gtk_init() is only getting called in startup() */
_gtk_accel_map_init ();
gtk_accelerator_parse (accelerator, &accel_key, &accel_mods);
if (accel_key == 0)
{
g_warning ("Failed to parse accelerator: '%s'\n", accelerator);
return;
}
accel_path = _gtk_accel_path_for_action (action_name, parameter);
if (gtk_accel_map_lookup_entry (accel_path, NULL))
gtk_accel_map_change_entry (accel_path, accel_key, accel_mods, TRUE);
else
gtk_accel_map_add_entry (accel_path, accel_key, accel_mods);
g_free (accel_path);
}
/**
* 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
*/
void
gtk_application_remove_accelerator (GtkApplication *application,
const gchar *action_name,
GVariant *parameter)
{
gchar *accel_path;
g_return_if_fail (GTK_IS_APPLICATION (application));
accel_path = _gtk_accel_path_for_action (action_name, parameter);
if (!gtk_accel_map_lookup_entry (accel_path, NULL))
{
g_warning ("No accelerator found for '%s'\n", accel_path);
g_free (accel_path);
return;
}
gtk_accel_map_change_entry (accel_path, 0, 0, FALSE);
g_free (accel_path);
}
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