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gnome-shell/src/shell-app.c
Robert Mader 22f691939c Stop using GSlice 
It has been inofficially deprecated for years, is known to cause issues
with valgrind and potentially hides memory corruption.
Lets stop using it.

https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1473
2020-10-19 20:18:11 +02:00

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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
#include "config.h"
#include <string.h>
#include <glib/gi18n-lib.h>
#include <meta/display.h>
#include <meta/meta-workspace-manager.h>
#include <meta/meta-x11-display.h>
#include "shell-app-private.h"
#include "shell-enum-types.h"
#include "shell-global.h"
#include "shell-util.h"
#include "shell-app-system-private.h"
#include "shell-window-tracker-private.h"
#include "st.h"
#include "gtkactionmuxer.h"
#include "org-gtk-application.h"
#include "switcheroo-control.h"
#ifdef HAVE_SYSTEMD
#include <systemd/sd-journal.h>
#include <errno.h>
#include <unistd.h>
#endif
/* This is mainly a memory usage optimization - the user is going to
* be running far fewer of the applications at one time than they have
* installed. But it also just helps keep the code more logically
* separated.
*/
typedef struct {
guint refcount;
/* Signal connection to dirty window sort list on workspace changes */
gulong workspace_switch_id;
GSList *windows;
guint interesting_windows;
/* Whether or not we need to resort the windows; this is done on demand */
guint window_sort_stale : 1;
/* See GApplication documentation */
GtkActionMuxer *muxer;
char *unique_bus_name;
GDBusConnection *session;
/* GDBus Proxy for getting application busy state */
ShellOrgGtkApplication *application_proxy;
GCancellable *cancellable;
} ShellAppRunningState;
/**
* SECTION:shell-app
* @short_description: Object representing an application
*
* This object wraps a #GDesktopAppInfo, providing methods and signals
* primarily useful for running applications.
*/
struct _ShellApp
{
GObject parent;
int started_on_workspace;
ShellAppState state;
GDesktopAppInfo *info; /* If NULL, this app is backed by one or more
* MetaWindow. For purposes of app title
* etc., we use the first window added,
* because it's most likely to be what we
* want (e.g. it will be of TYPE_NORMAL from
* the way shell-window-tracker.c works).
*/
GIcon *fallback_icon;
ShellAppRunningState *running_state;
char *window_id_string;
char *name_collation_key;
};
enum {
PROP_0,
PROP_STATE,
PROP_BUSY,
PROP_ID,
PROP_DBUS_ID,
PROP_ACTION_GROUP,
PROP_APP_INFO
};
enum {
WINDOWS_CHANGED,
LAST_SIGNAL
};
static guint shell_app_signals[LAST_SIGNAL] = { 0 };
static void create_running_state (ShellApp *app);
static void unref_running_state (ShellAppRunningState *state);
G_DEFINE_TYPE (ShellApp, shell_app, G_TYPE_OBJECT)
static void
shell_app_get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ShellApp *app = SHELL_APP (gobject);
switch (prop_id)
{
case PROP_STATE:
g_value_set_enum (value, app->state);
break;
case PROP_BUSY:
g_value_set_boolean (value, shell_app_get_busy (app));
break;
case PROP_ID:
g_value_set_string (value, shell_app_get_id (app));
break;
case PROP_ACTION_GROUP:
if (app->running_state)
g_value_set_object (value, app->running_state->muxer);
break;
case PROP_APP_INFO:
if (app->info)
g_value_set_object (value, app->info);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
shell_app_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ShellApp *app = SHELL_APP (gobject);
switch (prop_id)
{
case PROP_APP_INFO:
_shell_app_set_app_info (app, g_value_get_object (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
const char *
shell_app_get_id (ShellApp *app)
{
if (app->info)
return g_app_info_get_id (G_APP_INFO (app->info));
return app->window_id_string;
}
static MetaWindow *
window_backed_app_get_window (ShellApp *app)
{
g_assert (app->info == NULL);
if (app->running_state)
{
g_assert (app->running_state->windows);
return app->running_state->windows->data;
}
else
return NULL;
}
/**
* shell_app_get_icon:
*
* Look up the icon for this application
*
* Return value: (transfer none): A #GIcon
*/
GIcon *
shell_app_get_icon (ShellApp *app)
{
MetaWindow *window = NULL;
g_return_val_if_fail (SHELL_IS_APP (app), NULL);
if (app->info)
return g_app_info_get_icon (G_APP_INFO (app->info));
if (app->fallback_icon)
return app->fallback_icon;
/* During a state transition from running to not-running for
* window-backend apps, it's possible we get a request for the icon.
* Avoid asserting here and just return a fallback icon
*/
if (app->running_state != NULL)
window = window_backed_app_get_window (app);
if (window &&
meta_window_get_client_type (window) == META_WINDOW_CLIENT_TYPE_X11)
{
app->fallback_icon =
st_texture_cache_bind_cairo_surface_property (st_texture_cache_get_default (),
G_OBJECT (window),
"icon");
}
else
{
app->fallback_icon = g_themed_icon_new ("application-x-executable");
}
return app->fallback_icon;
}
/**
* shell_app_create_icon_texture:
*
* Look up the icon for this application, and create a #ClutterActor
* for it at the given size.
*
* Return value: (transfer none): A floating #ClutterActor
*/
ClutterActor *
shell_app_create_icon_texture (ShellApp *app,
int size)
{
GIcon *icon;
ClutterActor *ret;
ret = st_icon_new ();
st_icon_set_icon_size (ST_ICON (ret), size);
st_icon_set_fallback_icon_name (ST_ICON (ret), "application-x-executable");
icon = shell_app_get_icon (app);
st_icon_set_gicon (ST_ICON (ret), icon);
if (shell_app_is_window_backed (app))
st_widget_add_style_class_name (ST_WIDGET (ret), "fallback-app-icon");
return ret;
}
const char *
shell_app_get_name (ShellApp *app)
{
if (app->info)
return g_app_info_get_name (G_APP_INFO (app->info));
else
{
MetaWindow *window = window_backed_app_get_window (app);
const char *name = NULL;
if (window)
name = meta_window_get_wm_class (window);
if (!name)
name = C_("program", "Unknown");
return name;
}
}
const char *
shell_app_get_description (ShellApp *app)
{
if (app->info)
return g_app_info_get_description (G_APP_INFO (app->info));
else
return NULL;
}
/**
* shell_app_is_window_backed:
*
* A window backed application is one which represents just an open
* window, i.e. there's no .desktop file association, so we don't know
* how to launch it again.
*/
gboolean
shell_app_is_window_backed (ShellApp *app)
{
return app->info == NULL;
}
typedef struct {
MetaWorkspace *workspace;
GSList **transients;
} CollectTransientsData;
static gboolean
collect_transients_on_workspace (MetaWindow *window,
gpointer datap)
{
CollectTransientsData *data = datap;
if (data->workspace && meta_window_get_workspace (window) != data->workspace)
return TRUE;
*data->transients = g_slist_prepend (*data->transients, window);
return TRUE;
}
/* The basic idea here is that when we're targeting a window,
* if it has transients we want to pick the most recent one
* the user interacted with.
* This function makes raising GEdit with the file chooser
* open work correctly.
*/
static MetaWindow *
find_most_recent_transient_on_same_workspace (MetaDisplay *display,
MetaWindow *reference)
{
GSList *transients, *transients_sorted, *iter;
MetaWindow *result;
CollectTransientsData data;
transients = NULL;
data.workspace = meta_window_get_workspace (reference);
data.transients = &transients;
meta_window_foreach_transient (reference, collect_transients_on_workspace, &data);
transients_sorted = meta_display_sort_windows_by_stacking (display, transients);
/* Reverse this so we're top-to-bottom (yes, we should probably change the order
* returned from the sort_windows_by_stacking function)
*/
transients_sorted = g_slist_reverse (transients_sorted);
g_slist_free (transients);
transients = NULL;
result = NULL;
for (iter = transients_sorted; iter; iter = iter->next)
{
MetaWindow *window = iter->data;
MetaWindowType wintype = meta_window_get_window_type (window);
/* Don't want to focus UTILITY types, like the Gimp toolbars */
if (wintype == META_WINDOW_NORMAL ||
wintype == META_WINDOW_DIALOG)
{
result = window;
break;
}
}
g_slist_free (transients_sorted);
return result;
}
static MetaWorkspace *
get_active_workspace (void)
{
ShellGlobal *global = shell_global_get ();
MetaDisplay *display = shell_global_get_display (global);
MetaWorkspaceManager *workspace_manager =
meta_display_get_workspace_manager (display);
return meta_workspace_manager_get_active_workspace (workspace_manager);
}
/**
* shell_app_activate_window:
* @app: a #ShellApp
* @window: (nullable): Window to be focused
* @timestamp: Event timestamp
*
* Bring all windows for the given app to the foreground,
* but ensure that @window is on top. If @window is %NULL,
* the window with the most recent user time for the app
* will be used.
*
* This function has no effect if @app is not currently running.
*/
void
shell_app_activate_window (ShellApp *app,
MetaWindow *window,
guint32 timestamp)
{
GSList *windows;
if (shell_app_get_state (app) != SHELL_APP_STATE_RUNNING)
return;
windows = shell_app_get_windows (app);
if (window == NULL && windows)
window = windows->data;
if (!g_slist_find (windows, window))
return;
else
{
GSList *windows_reversed, *iter;
ShellGlobal *global = shell_global_get ();
MetaDisplay *display = shell_global_get_display (global);
MetaWorkspace *active = get_active_workspace ();
MetaWorkspace *workspace = meta_window_get_workspace (window);
guint32 last_user_timestamp = meta_display_get_last_user_time (display);
MetaWindow *most_recent_transient;
if (meta_display_xserver_time_is_before (display, timestamp, last_user_timestamp))
{
meta_window_set_demands_attention (window);
return;
}
/* Now raise all the other windows for the app that are on
* the same workspace, in reverse order to preserve the stacking.
*/
windows_reversed = g_slist_copy (windows);
windows_reversed = g_slist_reverse (windows_reversed);
for (iter = windows_reversed; iter; iter = iter->next)
{
MetaWindow *other_window = iter->data;
if (other_window != window && meta_window_get_workspace (other_window) == workspace)
meta_window_raise (other_window);
}
g_slist_free (windows_reversed);
/* If we have a transient that the user's interacted with more recently than
* the window, pick that.
*/
most_recent_transient = find_most_recent_transient_on_same_workspace (display, window);
if (most_recent_transient
&& meta_display_xserver_time_is_before (display,
meta_window_get_user_time (window),
meta_window_get_user_time (most_recent_transient)))
window = most_recent_transient;
if (active != workspace)
meta_workspace_activate_with_focus (workspace, window, timestamp);
else
meta_window_activate (window, timestamp);
}
}
void
shell_app_update_window_actions (ShellApp *app, MetaWindow *window)
{
const char *object_path;
object_path = meta_window_get_gtk_window_object_path (window);
if (object_path != NULL)
{
GActionGroup *actions;
actions = g_object_get_data (G_OBJECT (window), "actions");
if (actions == NULL)
{
actions = G_ACTION_GROUP (g_dbus_action_group_get (app->running_state->session,
meta_window_get_gtk_unique_bus_name (window),
object_path));
g_object_set_data_full (G_OBJECT (window), "actions", actions, g_object_unref);
}
g_assert (app->running_state->muxer);
gtk_action_muxer_insert (app->running_state->muxer, "win", actions);
g_object_notify (G_OBJECT (app), "action-group");
}
}
/**
* shell_app_activate:
* @app: a #ShellApp
*
* Like shell_app_activate_full(), but using the default workspace and
* event timestamp.
*/
void
shell_app_activate (ShellApp *app)
{
return shell_app_activate_full (app, -1, 0);
}
/**
* shell_app_activate_full:
* @app: a #ShellApp
* @workspace: launch on this workspace, or -1 for default. Ignored if
* activating an existing window
* @timestamp: Event timestamp
*
* Perform an appropriate default action for operating on this application,
* dependent on its current state. For example, if the application is not
* currently running, launch it. If it is running, activate the most
* recently used NORMAL window (or if that window has a transient, the most
* recently used transient for that window).
*/
void
shell_app_activate_full (ShellApp *app,
int workspace,
guint32 timestamp)
{
ShellGlobal *global;
global = shell_global_get ();
if (timestamp == 0)
timestamp = shell_global_get_current_time (global);
switch (app->state)
{
case SHELL_APP_STATE_STOPPED:
{
GError *error = NULL;
if (!shell_app_launch (app, timestamp, workspace, SHELL_APP_LAUNCH_GPU_APP_PREF, &error))
{
char *msg;
msg = g_strdup_printf (_("Failed to launch “%s”"), shell_app_get_name (app));
shell_global_notify_error (global,
msg,
error->message);
g_free (msg);
g_clear_error (&error);
}
}
break;
case SHELL_APP_STATE_STARTING:
break;
case SHELL_APP_STATE_RUNNING:
shell_app_activate_window (app, NULL, timestamp);
break;
default:
g_assert_not_reached();
break;
}
}
/**
* shell_app_open_new_window:
* @app: a #ShellApp
* @workspace: open on this workspace, or -1 for default
*
* Request that the application create a new window.
*/
void
shell_app_open_new_window (ShellApp *app,
int workspace)
{
GActionGroup *group = NULL;
const char * const *actions;
g_return_if_fail (app->info != NULL);
/* First check whether the application provides a "new-window" desktop
* action - it is a safe bet that it will open a new window, and activating
* it will trigger startup notification if necessary
*/
actions = g_desktop_app_info_list_actions (G_DESKTOP_APP_INFO (app->info));
if (g_strv_contains (actions, "new-window"))
{
shell_app_launch_action (app, "new-window", 0, workspace);
return;
}
/* Next, check whether the app exports an explicit "new-window" action
* that we can activate on the bus - the muxer will add startup notification
* information to the platform data, so this should work just as well as
* desktop actions.
*/
group = app->running_state ? G_ACTION_GROUP (app->running_state->muxer)
: NULL;
if (group &&
g_action_group_has_action (group, "app.new-window") &&
g_action_group_get_action_parameter_type (group, "app.new-window") == NULL)
{
g_action_group_activate_action (group, "app.new-window", NULL);
return;
}
/* Lastly, just always launch the application again, even if we know
* it was already running. For most applications this
* should have the effect of creating a new window, whether that's
* a second process (in the case of Calculator) or IPC to existing
* instance (Firefox). There are a few less-sensical cases such
* as say Pidgin.
*/
shell_app_launch (app, 0, workspace, SHELL_APP_LAUNCH_GPU_APP_PREF, NULL);
}
/**
* shell_app_can_open_new_window:
* @app: a #ShellApp
*
* Returns %TRUE if the app supports opening a new window through
* shell_app_open_new_window() (ie, if calling that function will
* result in actually opening a new window and not something else,
* like presenting the most recently active one)
*/
gboolean
shell_app_can_open_new_window (ShellApp *app)
{
ShellAppRunningState *state;
MetaWindow *window;
GDesktopAppInfo *desktop_info;
const char * const *desktop_actions;
/* Apps that are stopped can always open new windows, because
* activating them would open the first one; if they are starting,
* we cannot tell whether they can open additional windows until
* they are running */
if (app->state != SHELL_APP_STATE_RUNNING)
return app->state == SHELL_APP_STATE_STOPPED;
state = app->running_state;
/* If the app has an explicit new-window action, then it can
(or it should be able to) ...
*/
if (g_action_group_has_action (G_ACTION_GROUP (state->muxer), "app.new-window"))
return TRUE;
/* If the app doesn't have a desktop file, then nothing is possible */
if (!app->info)
return FALSE;
desktop_info = G_DESKTOP_APP_INFO (app->info);
/* If the app is explicitly telling us, then we know for sure */
if (g_desktop_app_info_has_key (desktop_info, "X-GNOME-SingleWindow"))
return !g_desktop_app_info_get_boolean (desktop_info,
"X-GNOME-SingleWindow");
/* If it has a new-window desktop action, it should be able to */
desktop_actions = g_desktop_app_info_list_actions (desktop_info);
if (desktop_actions && g_strv_contains (desktop_actions, "new-window"))
return TRUE;
/* If this is a unique GtkApplication, and we don't have a new-window, then
probably we can't
We don't consider non-unique GtkApplications here to handle cases like
evince, which don't export a new-window action because each window is in
a different process. In any case, in a non-unique GtkApplication each
Activate() knows nothing about the other instances, so it will show a
new window.
*/
window = state->windows->data;
if (state->unique_bus_name != NULL &&
meta_window_get_gtk_application_object_path (window) != NULL)
{
if (meta_window_get_gtk_application_id (window) != NULL)
return FALSE;
else
return TRUE;
}
/* In all other cases, we don't have a reliable source of information
or a decent heuristic, so we err on the compatibility side and say
yes.
*/
return TRUE;
}
/**
* shell_app_get_state:
* @app: a #ShellApp
*
* Returns: State of the application
*/
ShellAppState
shell_app_get_state (ShellApp *app)
{
return app->state;
}
typedef struct {
ShellApp *app;
MetaWorkspace *active_workspace;
} CompareWindowsData;
static int
shell_app_compare_windows (gconstpointer a,
gconstpointer b,
gpointer datap)
{
MetaWindow *win_a = (gpointer)a;
MetaWindow *win_b = (gpointer)b;
CompareWindowsData *data = datap;
gboolean ws_a, ws_b;
gboolean vis_a, vis_b;
ws_a = meta_window_get_workspace (win_a) == data->active_workspace;
ws_b = meta_window_get_workspace (win_b) == data->active_workspace;
if (ws_a && !ws_b)
return -1;
else if (!ws_a && ws_b)
return 1;
vis_a = meta_window_showing_on_its_workspace (win_a);
vis_b = meta_window_showing_on_its_workspace (win_b);
if (vis_a && !vis_b)
return -1;
else if (!vis_a && vis_b)
return 1;
return meta_window_get_user_time (win_b) - meta_window_get_user_time (win_a);
}
/**
* shell_app_get_windows:
* @app:
*
* Get the windows which are associated with this application. The
* returned list will be sorted first by whether they're on the
* active workspace, then by whether they're visible, and finally
* by the time the user last interacted with them.
*
* Returns: (transfer none) (element-type MetaWindow): List of windows
*/
GSList *
shell_app_get_windows (ShellApp *app)
{
if (app->running_state == NULL)
return NULL;
if (app->running_state->window_sort_stale)
{
CompareWindowsData data;
data.app = app;
data.active_workspace = get_active_workspace ();
app->running_state->windows = g_slist_sort_with_data (app->running_state->windows, shell_app_compare_windows, &data);
app->running_state->window_sort_stale = FALSE;
}
return app->running_state->windows;
}
guint
shell_app_get_n_windows (ShellApp *app)
{
if (app->running_state == NULL)
return 0;
return g_slist_length (app->running_state->windows);
}
gboolean
shell_app_is_on_workspace (ShellApp *app,
MetaWorkspace *workspace)
{
GSList *iter;
if (shell_app_get_state (app) == SHELL_APP_STATE_STARTING)
{
if (app->started_on_workspace == -1 ||
meta_workspace_index (workspace) == app->started_on_workspace)
return TRUE;
else
return FALSE;
}
if (app->running_state == NULL)
return FALSE;
for (iter = app->running_state->windows; iter; iter = iter->next)
{
if (meta_window_get_workspace (iter->data) == workspace)
return TRUE;
}
return FALSE;
}
static int
shell_app_get_last_user_time (ShellApp *app)
{
GSList *iter;
guint32 last_user_time;
last_user_time = 0;
if (app->running_state != NULL)
{
for (iter = app->running_state->windows; iter; iter = iter->next)
last_user_time = MAX (last_user_time, meta_window_get_user_time (iter->data));
}
return (int)last_user_time;
}
static gboolean
shell_app_is_minimized (ShellApp *app)
{
GSList *iter;
if (app->running_state == NULL)
return FALSE;
for (iter = app->running_state->windows; iter; iter = iter->next)
{
if (meta_window_showing_on_its_workspace (iter->data))
return FALSE;
}
return TRUE;
}
/**
* shell_app_compare:
* @app:
* @other: A #ShellApp
*
* Compare one #ShellApp instance to another, in the following way:
* - Running applications sort before not-running applications.
* - If one of them has non-minimized windows and the other does not,
* the one with visible windows is first.
* - Finally, the application which the user interacted with most recently
* compares earlier.
*/
int
shell_app_compare (ShellApp *app,
ShellApp *other)
{
gboolean min_app, min_other;
if (app->state != other->state)
{
if (app->state == SHELL_APP_STATE_RUNNING)
return -1;
return 1;
}
min_app = shell_app_is_minimized (app);
min_other = shell_app_is_minimized (other);
if (min_app != min_other)
{
if (min_other)
return -1;
return 1;
}
if (app->state == SHELL_APP_STATE_RUNNING)
{
if (app->running_state->windows && !other->running_state->windows)
return -1;
else if (!app->running_state->windows && other->running_state->windows)
return 1;
return shell_app_get_last_user_time (other) - shell_app_get_last_user_time (app);
}
return 0;
}
ShellApp *
_shell_app_new_for_window (MetaWindow *window)
{
ShellApp *app;
app = g_object_new (SHELL_TYPE_APP, NULL);
app->window_id_string = g_strdup_printf ("window:%d", meta_window_get_stable_sequence (window));
_shell_app_add_window (app, window);
return app;
}
ShellApp *
_shell_app_new (GDesktopAppInfo *info)
{
ShellApp *app;
app = g_object_new (SHELL_TYPE_APP,
"app-info", info,
NULL);
return app;
}
void
_shell_app_set_app_info (ShellApp *app,
GDesktopAppInfo *info)
{
g_set_object (&app->info, info);
g_clear_pointer (&app->name_collation_key, g_free);
if (app->info)
app->name_collation_key = g_utf8_collate_key (shell_app_get_name (app), -1);
}
static void
shell_app_state_transition (ShellApp *app,
ShellAppState state)
{
if (app->state == state)
return;
g_return_if_fail (!(app->state == SHELL_APP_STATE_RUNNING &&
state == SHELL_APP_STATE_STARTING));
app->state = state;
_shell_app_system_notify_app_state_changed (shell_app_system_get_default (), app);
g_object_notify (G_OBJECT (app), "state");
}
static void
shell_app_on_unmanaged (MetaWindow *window,
ShellApp *app)
{
_shell_app_remove_window (app, window);
}
static void
shell_app_on_user_time_changed (MetaWindow *window,
GParamSpec *pspec,
ShellApp *app)
{
g_assert (app->running_state != NULL);
/* Ideally we don't want to emit windows-changed if the sort order
* isn't actually changing. This check catches most of those.
*/
if (window != app->running_state->windows->data)
{
app->running_state->window_sort_stale = TRUE;
g_signal_emit (app, shell_app_signals[WINDOWS_CHANGED], 0);
}
}
static void
shell_app_sync_running_state (ShellApp *app)
{
g_return_if_fail (app->running_state != NULL);
if (app->state != SHELL_APP_STATE_STARTING)
{
if (app->running_state->interesting_windows == 0)
shell_app_state_transition (app, SHELL_APP_STATE_STOPPED);
else
shell_app_state_transition (app, SHELL_APP_STATE_RUNNING);
}
}
static void
shell_app_on_skip_taskbar_changed (MetaWindow *window,
GParamSpec *pspec,
ShellApp *app)
{
g_assert (app->running_state != NULL);
/* we rely on MetaWindow:skip-taskbar only being notified
* when it actually changes; when that assumption breaks,
* we'll have to track the "interesting" windows themselves
*/
if (meta_window_is_skip_taskbar (window))
app->running_state->interesting_windows--;
else
app->running_state->interesting_windows++;
shell_app_sync_running_state (app);
}
static void
shell_app_on_ws_switch (MetaWorkspaceManager *workspace_manager,
int from,
int to,
MetaMotionDirection direction,
gpointer data)
{
ShellApp *app = SHELL_APP (data);
g_assert (app->running_state != NULL);
app->running_state->window_sort_stale = TRUE;
g_signal_emit (app, shell_app_signals[WINDOWS_CHANGED], 0);
}
gboolean
shell_app_get_busy (ShellApp *app)
{
if (app->running_state != NULL &&
app->running_state->application_proxy != NULL &&
shell_org_gtk_application_get_busy (app->running_state->application_proxy))
return TRUE;
return FALSE;
}
static void
busy_changed_cb (GObject *object,
GParamSpec *pspec,
gpointer user_data)
{
ShellApp *app = user_data;
g_assert (SHELL_IS_APP (app));
g_object_notify (G_OBJECT (app), "busy");
}
static void
get_application_proxy (GObject *source,
GAsyncResult *result,
gpointer user_data)
{
ShellApp *app = user_data;
ShellOrgGtkApplication *proxy;
g_assert (SHELL_IS_APP (app));
proxy = shell_org_gtk_application_proxy_new_finish (result, NULL);
if (proxy != NULL)
{
app->running_state->application_proxy = proxy;
g_signal_connect (proxy,
"notify::busy",
G_CALLBACK (busy_changed_cb),
app);
if (shell_org_gtk_application_get_busy (proxy))
g_object_notify (G_OBJECT (app), "busy");
}
if (app->running_state != NULL)
g_clear_object (&app->running_state->cancellable);
g_object_unref (app);
}
static void
shell_app_ensure_busy_watch (ShellApp *app)
{
ShellAppRunningState *running_state = app->running_state;
MetaWindow *window;
const gchar *object_path;
if (running_state->application_proxy != NULL ||
running_state->cancellable != NULL)
return;
if (running_state->unique_bus_name == NULL)
return;
window = g_slist_nth_data (running_state->windows, 0);
object_path = meta_window_get_gtk_application_object_path (window);
if (object_path == NULL)
return;
running_state->cancellable = g_cancellable_new();
/* Take a reference to app to make sure it isn't finalized before
get_application_proxy runs */
shell_org_gtk_application_proxy_new (running_state->session,
G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START,
running_state->unique_bus_name,
object_path,
running_state->cancellable,
get_application_proxy,
g_object_ref (app));
}
void
_shell_app_add_window (ShellApp *app,
MetaWindow *window)
{
if (app->running_state && g_slist_find (app->running_state->windows, window))
return;
g_object_freeze_notify (G_OBJECT (app));
if (!app->running_state)
create_running_state (app);
app->running_state->window_sort_stale = TRUE;
app->running_state->windows = g_slist_prepend (app->running_state->windows, g_object_ref (window));
g_signal_connect_object (window, "unmanaged", G_CALLBACK(shell_app_on_unmanaged), app, 0);
g_signal_connect_object (window, "notify::user-time", G_CALLBACK(shell_app_on_user_time_changed), app, 0);
g_signal_connect_object (window, "notify::skip-taskbar", G_CALLBACK(shell_app_on_skip_taskbar_changed), app, 0);
shell_app_update_app_actions (app, window);
shell_app_ensure_busy_watch (app);
if (!meta_window_is_skip_taskbar (window))
app->running_state->interesting_windows++;
shell_app_sync_running_state (app);
g_object_thaw_notify (G_OBJECT (app));
g_signal_emit (app, shell_app_signals[WINDOWS_CHANGED], 0);
}
void
_shell_app_remove_window (ShellApp *app,
MetaWindow *window)
{
g_assert (app->running_state != NULL);
if (!g_slist_find (app->running_state->windows, window))
return;
g_signal_handlers_disconnect_by_func (window, G_CALLBACK(shell_app_on_unmanaged), app);
g_signal_handlers_disconnect_by_func (window, G_CALLBACK(shell_app_on_user_time_changed), app);
g_signal_handlers_disconnect_by_func (window, G_CALLBACK(shell_app_on_skip_taskbar_changed), app);
g_object_unref (window);
app->running_state->windows = g_slist_remove (app->running_state->windows, window);
if (!meta_window_is_skip_taskbar (window))
app->running_state->interesting_windows--;
shell_app_sync_running_state (app);
if (app->running_state->windows == NULL)
g_clear_pointer (&app->running_state, unref_running_state);
g_signal_emit (app, shell_app_signals[WINDOWS_CHANGED], 0);
}
/**
* shell_app_get_pids:
* @app: a #ShellApp
*
* Returns: (transfer container) (element-type int): An unordered list of process identifiers associated with this application.
*/
GSList *
shell_app_get_pids (ShellApp *app)
{
GSList *result;
GSList *iter;
result = NULL;
for (iter = shell_app_get_windows (app); iter; iter = iter->next)
{
MetaWindow *window = iter->data;
pid_t pid = meta_window_get_pid (window);
if (pid < 1)
continue;
/* Note in the (by far) common case, app will only have one pid, so
* we'll hit the first element, so don't worry about O(N^2) here.
*/
if (!g_slist_find (result, GINT_TO_POINTER (pid)))
result = g_slist_prepend (result, GINT_TO_POINTER (pid));
}
return result;
}
void
_shell_app_handle_startup_sequence (ShellApp *app,
MetaStartupSequence *sequence)
{
gboolean starting = !meta_startup_sequence_get_completed (sequence);
/* The Shell design calls for on application launch, the app title
* appears at top, and no X window is focused. So when we get
* a startup-notification for this app, transition it to STARTING
* if it's currently stopped, set it as our application focus,
* but focus the no_focus window.
*/
if (starting && shell_app_get_state (app) == SHELL_APP_STATE_STOPPED)
{
MetaDisplay *display = shell_global_get_display (shell_global_get ());
shell_app_state_transition (app, SHELL_APP_STATE_STARTING);
meta_display_unset_input_focus (display,
meta_startup_sequence_get_timestamp (sequence));
app->started_on_workspace = meta_startup_sequence_get_workspace (sequence);
}
if (!starting)
{
if (app->running_state && app->running_state->windows)
shell_app_state_transition (app, SHELL_APP_STATE_RUNNING);
else /* application have > 1 .desktop file */
shell_app_state_transition (app, SHELL_APP_STATE_STOPPED);
}
}
/**
* shell_app_request_quit:
* @app: A #ShellApp
*
* Initiate an asynchronous request to quit this application.
* The application may interact with the user, and the user
* might cancel the quit request from the application UI.
*
* This operation may not be supported for all applications.
*
* Returns: %TRUE if a quit request is supported for this application
*/
gboolean
shell_app_request_quit (ShellApp *app)
{
GActionGroup *group = NULL;
GSList *iter;
if (shell_app_get_state (app) != SHELL_APP_STATE_RUNNING)
return FALSE;
/* First, check whether the app exports an explicit "quit" action
* that we can activate on the bus
*/
group = G_ACTION_GROUP (app->running_state->muxer);
if (g_action_group_has_action (group, "app.quit") &&
g_action_group_get_action_parameter_type (group, "app.quit") == NULL)
{
g_action_group_activate_action (group, "app.quit", NULL);
return TRUE;
}
/* Otherwise, fall back to closing all the app's windows */
for (iter = app->running_state->windows; iter; iter = iter->next)
{
MetaWindow *win = iter->data;
if (!meta_window_can_close (win))
continue;
meta_window_delete (win, shell_global_get_current_time (shell_global_get ()));
}
return TRUE;
}
#if !defined(HAVE_GIO_DESKTOP_LAUNCH_URIS_WITH_FDS) && defined(HAVE_SYSTEMD)
/* This sets up the launched application to log to the journal
* using its own identifier, instead of just "gnome-session".
*/
static void
app_child_setup (gpointer user_data)
{
const char *appid = user_data;
int res;
int journalfd = sd_journal_stream_fd (appid, LOG_INFO, FALSE);
if (journalfd >= 0)
{
do
res = dup2 (journalfd, 1);
while (G_UNLIKELY (res == -1 && errno == EINTR));
do
res = dup2 (journalfd, 2);
while (G_UNLIKELY (res == -1 && errno == EINTR));
(void) close (journalfd);
}
}
#endif
static void
wait_pid (GDesktopAppInfo *appinfo,
GPid pid,
gpointer user_data)
{
g_child_watch_add (pid, (GChildWatchFunc) g_spawn_close_pid, NULL);
}
static void
apply_discrete_gpu_env (GAppLaunchContext *context,
ShellGlobal *global)
{
GDBusProxy *proxy;
GVariant* variant;
guint num_children, i;
proxy = shell_global_get_switcheroo_control (global);
if (!proxy)
{
g_warning ("Could not apply discrete GPU environment, switcheroo-control not available");
return;
}
variant = shell_net_hadess_switcheroo_control_get_gpus (SHELL_NET_HADESS_SWITCHEROO_CONTROL (proxy));
if (!variant)
{
g_warning ("Could not apply discrete GPU environment, no GPUs in list");
return;
}
num_children = g_variant_n_children (variant);
for (i = 0; i < num_children; i++)
{
g_autoptr(GVariant) gpu = NULL;
g_autoptr(GVariant) env = NULL;
g_autoptr(GVariant) default_variant = NULL;
g_autofree const char **env_s = NULL;
guint j;
gpu = g_variant_get_child_value (variant, i);
if (!gpu ||
!g_variant_is_of_type (gpu, G_VARIANT_TYPE ("a{s*}")))
continue;
/* Skip over the default GPU */
default_variant = g_variant_lookup_value (gpu, "Default", NULL);
if (!default_variant || g_variant_get_boolean (default_variant))
continue;
env = g_variant_lookup_value (gpu, "Environment", NULL);
if (!env)
continue;
env_s = g_variant_get_strv (env, NULL);
for (j = 0; env_s[j] != NULL; j = j + 2)
g_app_launch_context_setenv (context, env_s[j], env_s[j+1]);
return;
}
g_debug ("Could not find discrete GPU in switcheroo-control, not applying environment");
}
/**
* shell_app_launch:
* @timestamp: Event timestamp, or 0 for current event timestamp
* @workspace: Start on this workspace, or -1 for default
* @gpu_pref: the GPU to prefer launching on
* @error: A #GError
*/
gboolean
shell_app_launch (ShellApp *app,
guint timestamp,
int workspace,
ShellAppLaunchGpu gpu_pref,
GError **error)
{
ShellGlobal *global;
GAppLaunchContext *context;
gboolean ret;
GSpawnFlags flags;
gboolean discrete_gpu = FALSE;
if (app->info == NULL)
{
MetaWindow *window = window_backed_app_get_window (app);
/* We don't use an error return if there no longer any windows, because the
* user attempting to activate a stale window backed app isn't something
* we would expect the caller to meaningfully handle or display an error
* message to the user.
*/
if (window)
meta_window_activate (window, timestamp);
return TRUE;
}
global = shell_global_get ();
context = shell_global_create_app_launch_context (global, timestamp, workspace);
if (gpu_pref == SHELL_APP_LAUNCH_GPU_APP_PREF)
discrete_gpu = g_desktop_app_info_get_boolean (app->info, "PrefersNonDefaultGPU");
else
discrete_gpu = (gpu_pref == SHELL_APP_LAUNCH_GPU_DISCRETE);
if (discrete_gpu)
apply_discrete_gpu_env (context, global);
/* Set LEAVE_DESCRIPTORS_OPEN in order to use an optimized gspawn
* codepath. The shell's open file descriptors should be marked CLOEXEC
* so that they are automatically closed even with this flag set.
*/
flags = G_SPAWN_SEARCH_PATH | G_SPAWN_DO_NOT_REAP_CHILD |
G_SPAWN_LEAVE_DESCRIPTORS_OPEN;
#ifdef HAVE_GIO_DESKTOP_LAUNCH_URIS_WITH_FDS
/* Optimized spawn path, avoiding a child_setup function */
{
int journalfd = -1;
#ifdef HAVE_SYSTEMD
journalfd = sd_journal_stream_fd (shell_app_get_id (app), LOG_INFO, FALSE);
#endif /* HAVE_SYSTEMD */
ret = g_desktop_app_info_launch_uris_as_manager_with_fds (app->info, NULL,
context,
flags,
NULL, NULL,
wait_pid, NULL,
-1,
journalfd,
journalfd,
error);
if (journalfd >= 0)
(void) close (journalfd);
}
#else /* !HAVE_GIO_DESKTOP_LAUNCH_URIS_WITH_FDS */
ret = g_desktop_app_info_launch_uris_as_manager (app->info, NULL,
context,
flags,
#ifdef HAVE_SYSTEMD
app_child_setup, (gpointer)shell_app_get_id (app),
#else
NULL, NULL,
#endif
wait_pid, NULL,
error);
#endif /* HAVE_GIO_DESKTOP_LAUNCH_URIS_WITH_FDS */
g_object_unref (context);
return ret;
}
/**
* shell_app_launch_action:
* @app: the #ShellApp
* @action_name: the name of the action to launch (as obtained by
* g_desktop_app_info_list_actions())
* @timestamp: Event timestamp, or 0 for current event timestamp
* @workspace: Start on this workspace, or -1 for default
*/
void
shell_app_launch_action (ShellApp *app,
const char *action_name,
guint timestamp,
int workspace)
{
ShellGlobal *global;
GAppLaunchContext *context;
global = shell_global_get ();
context = shell_global_create_app_launch_context (global, timestamp, workspace);
g_desktop_app_info_launch_action (G_DESKTOP_APP_INFO (app->info),
action_name, context);
g_object_unref (context);
}
/**
* shell_app_get_app_info:
* @app: a #ShellApp
*
* Returns: (transfer none): The #GDesktopAppInfo for this app, or %NULL if backed by a window
*/
GDesktopAppInfo *
shell_app_get_app_info (ShellApp *app)
{
return app->info;
}
static void
create_running_state (ShellApp *app)
{
MetaDisplay *display = shell_global_get_display (shell_global_get ());
MetaWorkspaceManager *workspace_manager =
meta_display_get_workspace_manager (display);
g_assert (app->running_state == NULL);
app->running_state = g_new0 (ShellAppRunningState, 1);
app->running_state->refcount = 1;
app->running_state->workspace_switch_id =
g_signal_connect (workspace_manager, "workspace-switched",
G_CALLBACK (shell_app_on_ws_switch), app);
app->running_state->session = g_bus_get_sync (G_BUS_TYPE_SESSION, NULL, NULL);
g_assert (app->running_state->session != NULL);
app->running_state->muxer = gtk_action_muxer_new ();
}
void
shell_app_update_app_actions (ShellApp *app,
MetaWindow *window)
{
const gchar *unique_bus_name;
/* We assume that 'gtk-application-object-path' and
* 'gtk-app-menu-object-path' are the same for all windows which
* have it set.
*
* It could be possible, however, that the first window we see
* belonging to the app didn't have them set. For this reason, we
* take the values from the first window that has them set and ignore
* all the rest (until the app is stopped and restarted).
*/
unique_bus_name = meta_window_get_gtk_unique_bus_name (window);
if (g_strcmp0 (app->running_state->unique_bus_name, unique_bus_name) != 0)
{
const gchar *application_object_path;
GDBusActionGroup *actions;
application_object_path = meta_window_get_gtk_application_object_path (window);
if (application_object_path == NULL || unique_bus_name == NULL)
return;
g_clear_pointer (&app->running_state->unique_bus_name, g_free);
app->running_state->unique_bus_name = g_strdup (unique_bus_name);
actions = g_dbus_action_group_get (app->running_state->session, unique_bus_name, application_object_path);
gtk_action_muxer_insert (app->running_state->muxer, "app", G_ACTION_GROUP (actions));
g_object_unref (actions);
}
}
static void
unref_running_state (ShellAppRunningState *state)
{
MetaDisplay *display = shell_global_get_display (shell_global_get ());
MetaWorkspaceManager *workspace_manager =
meta_display_get_workspace_manager (display);
g_assert (state->refcount > 0);
state->refcount--;
if (state->refcount > 0)
return;
g_clear_signal_handler (&state->workspace_switch_id, workspace_manager);
g_clear_object (&state->application_proxy);
if (state->cancellable != NULL)
{
g_cancellable_cancel (state->cancellable);
g_clear_object (&state->cancellable);
}
g_clear_object (&state->muxer);
g_clear_object (&state->session);
g_clear_pointer (&state->unique_bus_name, g_free);
g_free (state);
}
/**
* shell_app_compare_by_name:
* @app: One app
* @other: The other app
*
* Order two applications by name.
*
* Returns: -1, 0, or 1; suitable for use as a comparison function
* for e.g. g_slist_sort()
*/
int
shell_app_compare_by_name (ShellApp *app, ShellApp *other)
{
return strcmp (app->name_collation_key, other->name_collation_key);
}
static void
shell_app_init (ShellApp *self)
{
self->state = SHELL_APP_STATE_STOPPED;
}
static void
shell_app_dispose (GObject *object)
{
ShellApp *app = SHELL_APP (object);
g_clear_object (&app->info);
g_clear_object (&app->fallback_icon);
while (app->running_state)
_shell_app_remove_window (app, app->running_state->windows->data);
/* We should have been transitioned when we removed all of our windows */
g_assert (app->state == SHELL_APP_STATE_STOPPED);
g_assert (app->running_state == NULL);
G_OBJECT_CLASS(shell_app_parent_class)->dispose (object);
}
static void
shell_app_finalize (GObject *object)
{
ShellApp *app = SHELL_APP (object);
g_free (app->window_id_string);
g_free (app->name_collation_key);
G_OBJECT_CLASS(shell_app_parent_class)->finalize (object);
}
static void
shell_app_class_init(ShellAppClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->get_property = shell_app_get_property;
gobject_class->set_property = shell_app_set_property;
gobject_class->dispose = shell_app_dispose;
gobject_class->finalize = shell_app_finalize;
shell_app_signals[WINDOWS_CHANGED] = g_signal_new ("windows-changed",
SHELL_TYPE_APP,
G_SIGNAL_RUN_LAST,
0,
NULL, NULL, NULL,
G_TYPE_NONE, 0);
/**
* ShellApp:state:
*
* The high-level state of the application, effectively whether it's
* running or not, or transitioning between those states.
*/
g_object_class_install_property (gobject_class,
PROP_STATE,
g_param_spec_enum ("state",
"State",
"Application state",
SHELL_TYPE_APP_STATE,
SHELL_APP_STATE_STOPPED,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
/**
* ShellApp:busy:
*
* Whether the application has marked itself as busy.
*/
g_object_class_install_property (gobject_class,
PROP_BUSY,
g_param_spec_boolean ("busy",
"Busy",
"Busy state",
FALSE,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
/**
* ShellApp:id:
*
* The id of this application (a desktop filename, or a special string
* like window:0xabcd1234)
*/
g_object_class_install_property (gobject_class,
PROP_ID,
g_param_spec_string ("id",
"Application id",
"The desktop file id of this ShellApp",
NULL,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
/**
* ShellApp:action-group:
*
* The #GDBusActionGroup associated with this ShellApp, if any. See the
* documentation of #GApplication and #GActionGroup for details.
*/
g_object_class_install_property (gobject_class,
PROP_ACTION_GROUP,
g_param_spec_object ("action-group",
"Application Action Group",
"The action group exported by the remote application",
G_TYPE_ACTION_GROUP,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
/**
* ShellApp:app-info:
*
* The #GDesktopAppInfo associated with this ShellApp, if any.
*/
g_object_class_install_property (gobject_class,
PROP_APP_INFO,
g_param_spec_object ("app-info",
"DesktopAppInfo",
"The DesktopAppInfo associated with this app",
G_TYPE_DESKTOP_APP_INFO,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
}
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