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gnome-shell/src/shell-app-usage.c
Milan Bouchet-Valat 2799327c84 Migrate to GSettings 
Use GSettings for all Shell configuration. GConf is kept to read
configuration from external programs (Metacity, Nautilus and Magnifier),
but ShellGConf is removed because it's mostly useless for the few calls
we still have. Also get rid of unused GConf code in ShellAppSystem.

A basic GConf schema is still used to override Metacity defaults and
configure Magnifier in a system-wide fashion. GConf is also used as
GSettings backend via the GSETTINGS_BACKEND environment variable.
All of this will be removed when these programs have been ported
to GSettings and able to use dconf.

GLib 2.25.9 is required. Schemas are converted to the new XML format,
and compiled at build time in data/ so that the Shell can be run from
the source tree. This also requires setting the GSETTINGS_SCHEMA_DIR
environment variable both when running installed or from source tree,
in src/gnome-shell.in and src/gnome-shell-clock-preferences.in.

https://bugzilla.gnome.org/show_bug.cgi?id=617917
2010-06-18 20:27:41 +02:00

952 lines
27 KiB
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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
#include "config.h"
#include <string.h>
#include <stdlib.h>
#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include <gdk/gdk.h>
#include <gdk/gdkx.h>
#include <glib.h>
#include <gio/gio.h>
#include <dbus/dbus-glib.h>
#include "shell-app-usage.h"
#include "shell-window-tracker.h"
#include "shell-global.h"
#include "shell-marshal.h"
#include "display.h"
#include "window.h"
#include "group.h"
/* This file includes modified code from
* desktop-data-engine/engine-dbus/hippo-application-monitor.c
* in the functions collecting application usage data.
* Written by Owen Taylor, originally licensed under LGPL 2.1.
* Copyright Red Hat, Inc. 2006-2008
*/
/**
* SECTION:shell-app-usage
* @short_description: Track application usage/state data
*
* This class maintains some usage and state statistics for
* applications by keeping track of the approximate time an application's
* windows are focused, as well as the last workspace it was seen on.
* This time tracking is implemented by watching for focus notifications,
* and computing a time delta between them. Also we watch the
* GNOME Session "StatusChanged" signal which by default is emitted after 5
* minutes to signify idle.
*/
#define ENABLE_MONITORING_KEY "enable-app-monitoring"
#define FOCUS_TIME_MIN_SECONDS 7 /* Need 7 continuous seconds of focus */
#define USAGE_CLEAN_DAYS 7 /* If after 7 days we haven't seen an app, purge it */
/* Data is saved to file SHELL_CONFIG_DIR/DATA_FILENAME */
#define DATA_FILENAME "application_state"
#define IDLE_TIME_TRANSITION_SECONDS 30 /* If we transition to idle, only count
* this many seconds of usage */
/* The ranking algorithm we use is: every time an app score reaches SCORE_MAX,
* divide all scores by 2. Scores are raised by 1 unit every SAVE_APPS_TIMEOUT
* seconds. This mechanism allows the list to update relatively fast when
* a new app is used intensively.
* To keep the list clean, and avoid being Big Brother, apps that have not been
* seen for a week and whose score is below SCORE_MIN are removed.
*/
/* How often we save internally app data, in seconds */
#define SAVE_APPS_TIMEOUT_SECONDS (5 * 60)
/* With this value, an app goes from bottom to top of the
* usage list in 50 hours of use */
#define SCORE_MAX (3600 * 50 / FOCUS_TIME_MIN_SECONDS)
/* If an app's score in lower than this and the app has not been used in a week,
* remove it */
#define SCORE_MIN (SCORE_MAX >> 3)
/* http://www.gnome.org/~mccann/gnome-session/docs/gnome-session.html#org.gnome.SessionManager.Presence */
#define GNOME_SESSION_STATUS_IDLE 3
typedef struct UsageData UsageData;
struct _ShellAppUsage
{
GObject parent;
GFile *configfile;
DBusGProxy *session_proxy;
GdkDisplay *display;
gulong last_idle;
guint idle_focus_change_id;
guint save_id;
guint settings_notify;
gboolean currently_idle;
gboolean enable_monitoring;
GSList *previously_running;
long watch_start_time;
ShellApp *watched_app;
/* <char *context, GHashTable<char *appid, UsageData *usage>> */
GHashTable *app_usages_for_context;
};
G_DEFINE_TYPE (ShellAppUsage, shell_app_usage, G_TYPE_OBJECT);
/* Represents an application record for a given context */
struct UsageData
{
/* Whether the application we're tracking is "transient", see
* shell_app_info_is_transient.
*/
gboolean transient;
gdouble score; /* Based on the number of times we'e seen the app and normalized */
long last_seen; /* Used to clear old apps we've only seen a few times */
};
static void shell_app_usage_finalize (GObject *object);
static void on_session_status_changed (DBusGProxy *proxy, guint status, ShellAppUsage *self);
static void on_focus_app_changed (ShellWindowTracker *tracker, GParamSpec *spec, ShellAppUsage *self);
static void ensure_queued_save (ShellAppUsage *self);
static UsageData * get_app_usage_for_context_and_id (ShellAppUsage *self,
const char *context,
const char *appid);
static gboolean idle_save_application_usage (gpointer data);
static void restore_from_file (ShellAppUsage *self);
static void update_enable_monitoring (ShellAppUsage *self);
static void on_enable_monitoring_key_changed (GSettings *settings,
const gchar *key,
ShellAppUsage *self);
static long
get_time (void)
{
GTimeVal tv;
g_get_current_time (&tv);
return tv.tv_sec;
}
static void
shell_app_usage_class_init (ShellAppUsageClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->finalize = shell_app_usage_finalize;
}
static GHashTable *
get_usages_for_context (ShellAppUsage *self,
const char *context)
{
GHashTable *context_usages;
context_usages = g_hash_table_lookup (self->app_usages_for_context, context);
if (context_usages == NULL)
{
context_usages = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
g_hash_table_insert (self->app_usages_for_context, g_strdup (context),
context_usages);
}
return context_usages;
}
static UsageData *
get_app_usage_for_context_and_id (ShellAppUsage *self,
const char *context,
const char *appid)
{
UsageData *usage;
GHashTable *context_usages;
context_usages = get_usages_for_context (self, context);
usage = g_hash_table_lookup (context_usages, appid);
if (usage)
return usage;
usage = g_new0 (UsageData, 1);
g_hash_table_insert (context_usages, g_strdup (appid), usage);
return usage;
}
static UsageData *
get_usage_for_app (ShellAppUsage *self,
ShellApp *app)
{
const char *context;
context = _shell_window_tracker_get_app_context (shell_window_tracker_get_default (), app);
return get_app_usage_for_context_and_id (self, context, shell_app_get_id (app));
}
typedef struct {
gboolean in_context;
GHashTableIter context_iter;
const char *context_id;
GHashTableIter usage_iter;
} UsageIterator;
static void
usage_iterator_init (ShellAppUsage *self,
UsageIterator *iter)
{
iter->in_context = FALSE;
g_hash_table_iter_init (&(iter->context_iter), self->app_usages_for_context);
}
static gboolean
usage_iterator_next (ShellAppUsage *self,
UsageIterator *iter,
const char **context,
const char **id,
UsageData **usage)
{
gpointer key, value;
gboolean next_context;
if (!iter->in_context)
next_context = TRUE;
else if (!g_hash_table_iter_next (&(iter->usage_iter), &key, &value))
next_context = TRUE;
else
next_context = FALSE;
while (next_context)
{
GHashTable *app_usages;
if (!g_hash_table_iter_next (&(iter->context_iter), &key, &value))
return FALSE;
iter->in_context = TRUE;
iter->context_id = key;
app_usages = value;
g_hash_table_iter_init (&(iter->usage_iter), app_usages);
next_context = !g_hash_table_iter_next (&(iter->usage_iter), &key, &value);
}
*context = iter->context_id;
*id = key;
*usage = value;
return TRUE;
}
static void
usage_iterator_remove (ShellAppUsage *self,
UsageIterator *iter)
{
g_assert (iter->in_context);
g_hash_table_iter_remove (&(iter->usage_iter));
}
/* Limit the score to a certain level so that most used apps can change */
static void
normalize_usage (ShellAppUsage *self)
{
UsageIterator iter;
const char *context;
const char *id;
UsageData *usage;
usage_iterator_init (self, &iter);
while (usage_iterator_next (self, &iter, &context, &id, &usage))
{
usage->score /= 2;
}
}
static void
increment_usage_for_app_at_time (ShellAppUsage *self,
ShellApp *app,
long time)
{
UsageData *usage;
guint elapsed;
guint usage_count;
usage = get_usage_for_app (self, app);
usage->last_seen = time;
elapsed = time - self->watch_start_time;
usage_count = elapsed / FOCUS_TIME_MIN_SECONDS;
if (usage_count > 0)
{
usage->score += usage_count;
if (usage->score > SCORE_MAX)
normalize_usage (self);
ensure_queued_save (self);
}
}
static void
increment_usage_for_app (ShellAppUsage *self,
ShellApp *app)
{
long curtime = get_time ();
increment_usage_for_app_at_time (self, app, curtime);
}
static void
on_app_state_changed (ShellWindowTracker *tracker,
ShellApp *app,
gpointer user_data)
{
ShellAppUsage *self = SHELL_APP_USAGE (user_data);
UsageData *usage;
gboolean running;
if (shell_app_is_transient (app))
return;
usage = get_usage_for_app (self, app);
running = shell_app_get_state (app) == SHELL_APP_STATE_RUNNING;
usage->last_seen = get_time ();
}
static void
on_focus_app_changed (ShellWindowTracker *tracker,
GParamSpec *spec,
ShellAppUsage *self)
{
if (self->watched_app != NULL)
increment_usage_for_app (self, self->watched_app);
if (self->watched_app)
g_object_unref (self->watched_app);
g_object_get (tracker, "focus-app", &(self->watched_app), NULL);
self->watch_start_time = get_time ();
}
static void
on_session_status_changed (DBusGProxy *proxy,
guint status,
ShellAppUsage *self)
{
gboolean idle;
idle = (status >= GNOME_SESSION_STATUS_IDLE);
if (self->currently_idle == idle)
return;
self->currently_idle = idle;
if (idle)
{
long end_time;
/* The GNOME Session signal we watch is 5 minutes, but that's a long
* time for this purpose. Instead, just add a base 30 seconds.
*/
if (self->watched_app)
{
end_time = self->watch_start_time + IDLE_TIME_TRANSITION_SECONDS;
increment_usage_for_app_at_time (self, self->watched_app, end_time);
}
}
else
{
/* Transitioning to !idle, reset the start time */
self->watch_start_time = get_time ();
}
}
static void
shell_app_usage_init (ShellAppUsage *self)
{
ShellGlobal *global;
char *shell_userdata_dir, *path;
DBusGConnection *session_bus;
ShellWindowTracker *tracker;
global = shell_global_get ();
self->app_usages_for_context = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, (GDestroyNotify) g_hash_table_destroy);
tracker = shell_window_tracker_get_default ();
g_signal_connect (tracker, "notify::focus-app", G_CALLBACK (on_focus_app_changed), self);
g_signal_connect (tracker, "app-state-changed", G_CALLBACK (on_app_state_changed), self);
session_bus = dbus_g_bus_get (DBUS_BUS_SESSION, NULL);
self->session_proxy = dbus_g_proxy_new_for_name (session_bus, "org.gnome.SessionManager",
"/org/gnome/SessionManager/Presence",
"org.gnome.SessionManager");
dbus_g_proxy_add_signal (self->session_proxy, "StatusChanged",
G_TYPE_UINT, G_TYPE_INVALID, G_TYPE_INVALID);
dbus_g_proxy_connect_signal (self->session_proxy, "StatusChanged",
G_CALLBACK (on_session_status_changed), self, NULL);
self->last_idle = 0;
self->currently_idle = FALSE;
self->enable_monitoring = FALSE;
g_object_get (shell_global_get(), "userdatadir", &shell_userdata_dir, NULL),
path = g_build_filename (shell_userdata_dir, DATA_FILENAME, NULL);
g_free (shell_userdata_dir);
self->configfile = g_file_new_for_path (path);
g_free (path);
restore_from_file (self);
self->settings_notify = g_signal_connect (shell_global_get_settings (global),
"changed::" ENABLE_MONITORING_KEY,
G_CALLBACK (on_enable_monitoring_key_changed),
self);
update_enable_monitoring (self);
}
static void
shell_app_usage_finalize (GObject *object)
{
ShellGlobal *global;
ShellAppUsage *self = SHELL_APP_USAGE (object);
if (self->save_id > 0)
g_source_remove (self->save_id);
global = shell_global_get ();
g_signal_handler_disconnect (shell_global_get_settings (global),
self->settings_notify);
g_object_unref (self->configfile);
G_OBJECT_CLASS (shell_app_usage_parent_class)->finalize(object);
}
typedef struct {
ShellAppUsage *usage;
GHashTable *context_usages;
} SortAppsByUsageData;
static int
sort_apps_by_usage (gconstpointer a,
gconstpointer b,
gpointer datap)
{
SortAppsByUsageData *data = datap;
ShellApp *app_a, *app_b;
UsageData *usage_a, *usage_b;
app_a = (ShellApp*)a;
app_b = (ShellApp*)b;
usage_a = g_hash_table_lookup (data->context_usages, shell_app_get_id (app_a));
usage_b = g_hash_table_lookup (data->context_usages, shell_app_get_id (app_b));
return usage_b->score - usage_a->score;
}
/**
* shell_app_usage_get_most_used:
* @usage: the usage instance to request
* @context: Activity identifier
* @max_count: how many applications are requested. Note that the actual
* list size may be less, or NULL if not enough applications are registered.
*
* Get a list of most popular applications for a given context.
*
* Returns: (element-type ShellApp) (transfer full): List of applications
*/
GSList *
shell_app_usage_get_most_used (ShellAppUsage *self,
const char *context,
gint max_count)
{
GSList *apps;
GList *appids, *iter;
GHashTable *usages;
ShellAppSystem *appsys;
SortAppsByUsageData data;
usages = g_hash_table_lookup (self->app_usages_for_context, context);
if (usages == NULL)
return NULL;
appsys = shell_app_system_get_default ();
appids = g_hash_table_get_keys (usages);
apps = NULL;
for (iter = appids; iter; iter = iter->next)
{
const char *appid = iter->data;
ShellApp *app;
app = shell_app_system_get_app (appsys, appid);
if (!app)
continue;
apps = g_slist_prepend (apps, g_object_ref (app));
}
g_list_free (appids);
data.usage = self;
data.context_usages = usages;
apps = g_slist_sort_with_data (apps, sort_apps_by_usage, &data);
return apps;
}
static void
ensure_queued_save (ShellAppUsage *self)
{
if (self->save_id != 0)
return;
self->save_id = g_timeout_add_seconds (SAVE_APPS_TIMEOUT_SECONDS, idle_save_application_usage, self);
}
/* Clean up apps we see rarely.
* The logic behind this is that if an app was seen less than SCORE_MIN times
* and not seen for a week, it can probably be forgotten about.
* This should much reduce the size of the list and avoid 'pollution'. */
static gboolean
idle_clean_usage (ShellAppUsage *self)
{
UsageIterator iter;
const char *context;
const char *id;
UsageData *usage;
long current_time;
long week_ago;
current_time = get_time ();
week_ago = current_time - (7 * 24 * 60 * 60);
usage_iterator_init (self, &iter);
while (usage_iterator_next (self, &iter, &context, &id, &usage))
{
if ((usage->score < SCORE_MIN) &&
(usage->last_seen < week_ago))
usage_iterator_remove (self, &iter);
}
return FALSE;
}
static gboolean
write_escaped (GDataOutputStream *stream,
const char *str,
GError **error)
{
gboolean ret;
char *quoted = g_markup_escape_text (str, -1);
ret = g_data_output_stream_put_string (stream, quoted, NULL, error);
g_free (quoted);
return ret;
}
static gboolean
write_attribute_string (GDataOutputStream *stream,
const char *elt_name,
const char *str,
GError **error)
{
gboolean ret = FALSE;
char *elt;
elt = g_strdup_printf (" %s=\"", elt_name);
ret = g_data_output_stream_put_string (stream, elt, NULL, error);
g_free (elt);
if (!ret)
goto out;
ret = write_escaped (stream, str, error);
if (!ret)
goto out;
ret = g_data_output_stream_put_string (stream, "\"", NULL, error);
out:
return ret;
}
static gboolean
write_attribute_uint (GDataOutputStream *stream,
const char *elt_name,
guint value,
GError **error)
{
gboolean ret;
char *buf;
buf = g_strdup_printf ("%u", value);
ret = write_attribute_string (stream, elt_name, buf, error);
g_free (buf);
return ret;
}
static gboolean
write_attribute_double (GDataOutputStream *stream,
const char *elt_name,
double value,
GError **error)
{
gchar buf[G_ASCII_DTOSTR_BUF_SIZE];
gboolean ret;
g_ascii_dtostr (buf, sizeof (buf), value);
ret = write_attribute_string (stream, elt_name, buf, error);
return ret;
}
/* Save app data lists to file */
static gboolean
idle_save_application_usage (gpointer data)
{
ShellAppUsage *self = SHELL_APP_USAGE (data);
UsageIterator iter;
const char *current_context;
const char *context;
const char *id;
UsageData *usage;
GFileOutputStream *output;
GOutputStream *buffered_output;
GDataOutputStream *data_output;
GError *error = NULL;
self->save_id = 0;
/* Parent directory is already created by shell-global */
output = g_file_replace (self->configfile, NULL, FALSE, G_FILE_CREATE_NONE, NULL, &error);
if (!output)
{
g_debug ("Could not save applications usage data: %s", error->message);
g_error_free (error);
return FALSE;
}
buffered_output = g_buffered_output_stream_new (G_OUTPUT_STREAM (output));
g_object_unref (output);
data_output = g_data_output_stream_new (G_OUTPUT_STREAM (buffered_output));
g_object_unref (buffered_output);
if (!g_data_output_stream_put_string (data_output, "<?xml version=\"1.0\"?>\n<application-state>\n", NULL, &error))
goto out;
usage_iterator_init (self, &iter);
current_context = NULL;
while (usage_iterator_next (self, &iter, &context, &id, &usage))
{
ShellApp *app;
app = shell_app_system_get_app (shell_app_system_get_default(), id);
if (!app)
continue;
if (context != current_context)
{
if (current_context != NULL)
{
if (!g_data_output_stream_put_string (data_output, " </context>", NULL, &error))
goto out;
}
current_context = context;
if (!g_data_output_stream_put_string (data_output, " <context", NULL, &error))
goto out;
if (!write_attribute_string (data_output, "id", context, &error))
goto out;
if (!g_data_output_stream_put_string (data_output, ">\n", NULL, &error))
goto out;
}
if (!g_data_output_stream_put_string (data_output, " <application", NULL, &error))
goto out;
if (!write_attribute_string (data_output, "id", id, &error))
goto out;
if (!write_attribute_uint (data_output, "open-window-count", shell_app_get_n_windows (app), &error))
goto out;
if (!write_attribute_double (data_output, "score", usage->score, &error))
goto out;
if (!write_attribute_uint (data_output, "last-seen", usage->last_seen, &error))
goto out;
if (!g_data_output_stream_put_string (data_output, "/>\n", NULL, &error))
goto out;
}
if (current_context != NULL)
{
if (!g_data_output_stream_put_string (data_output, " </context>\n", NULL, &error))
goto out;
}
if (!g_data_output_stream_put_string (data_output, "</application-state>\n", NULL, &error))
goto out;
out:
if (!error)
g_output_stream_close_async (G_OUTPUT_STREAM (data_output), 0, NULL, NULL, NULL);
g_object_unref (data_output);
if (error)
{
g_debug ("Could not save applications usage data: %s", error->message);
g_error_free (error);
}
return FALSE;
}
typedef struct {
ShellAppUsage *self;
char *context;
} ParseData;
static void
shell_app_usage_start_element_handler (GMarkupParseContext *context,
const gchar *element_name,
const gchar **attribute_names,
const gchar **attribute_values,
gpointer user_data,
GError **error)
{
ParseData *data = user_data;
if (strcmp (element_name, "application-state") == 0)
{
}
else if (strcmp (element_name, "context") == 0)
{
char *context = NULL;
const char **attribute;
const char **value;
for (attribute = attribute_names, value = attribute_values; *attribute; attribute++, value++)
{
if (strcmp (*attribute, "id") == 0)
context = g_strdup (*value);
}
if (context < 0)
{
g_set_error (error,
G_MARKUP_ERROR,
G_MARKUP_ERROR_PARSE,
"Missing attribute id on <%s> element",
element_name);
return;
}
data->context = context;
}
else if (strcmp (element_name, "application") == 0)
{
const char **attribute;
const char **value;
UsageData *usage;
char *appid = NULL;
GHashTable *usage_table;
for (attribute = attribute_names, value = attribute_values; *attribute; attribute++, value++)
{
if (strcmp (*attribute, "id") == 0)
appid = g_strdup (*value);
}
if (!appid)
{
g_set_error (error,
G_MARKUP_ERROR,
G_MARKUP_ERROR_PARSE,
"Missing attribute id on <%s> element",
element_name);
return;
}
usage_table = get_usages_for_context (data->self, data->context);
usage = g_new0 (UsageData, 1);
g_hash_table_insert (usage_table, appid, usage);
for (attribute = attribute_names, value = attribute_values; *attribute; attribute++, value++)
{
if (strcmp (*attribute, "open-window-count") == 0)
{
guint count = strtoul (*value, NULL, 10);
if (count > 0)
data->self->previously_running = g_slist_prepend (data->self->previously_running,
g_strdup (appid));
}
else if (strcmp (*attribute, "score") == 0)
{
usage->score = g_ascii_strtod (*value, NULL);
}
else if (strcmp (*attribute, "last-seen") == 0)
{
usage->last_seen = (guint) g_ascii_strtoull (*value, NULL, 10);
}
}
}
else
{
g_set_error (error,
G_MARKUP_ERROR,
G_MARKUP_ERROR_PARSE,
"Unknown element <%s>",
element_name);
}
}
static void
shell_app_usage_end_element_handler (GMarkupParseContext *context,
const gchar *element_name,
gpointer user_data,
GError **error)
{
ParseData *data = user_data;
if (strcmp (element_name, "context") == 0)
{
g_free (data->context);
data->context = NULL;
}
}
static void
shell_app_usage_text_handler (GMarkupParseContext *context,
const gchar *text,
gsize text_len,
gpointer user_data,
GError **error)
{
/* do nothing, very very fast */
}
static GMarkupParser app_state_parse_funcs =
{
shell_app_usage_start_element_handler,
shell_app_usage_end_element_handler,
shell_app_usage_text_handler,
NULL,
NULL
};
/* Load data about apps usage from file */
static void
restore_from_file (ShellAppUsage *self)
{
GFileInputStream *input;
ParseData parse_data;
GMarkupParseContext *parse_context;
GError *error = NULL;
char buf[1024];
input = g_file_read (self->configfile, NULL, &error);
if (error)
{
if (error->code != G_IO_ERROR_NOT_FOUND)
g_warning ("Could not load applications usage data: %s", error->message);
g_error_free (error);
return;
}
memset (&parse_data, 0, sizeof (ParseData));
parse_data.self = self;
parse_data.context = NULL;
parse_context = g_markup_parse_context_new (&app_state_parse_funcs, 0, &parse_data, NULL);
while (TRUE)
{
gssize count = g_input_stream_read ((GInputStream*) input, buf, sizeof(buf), NULL, &error);
if (count <= 0)
goto out;
if (!g_markup_parse_context_parse (parse_context, buf, count, &error))
goto out;
}
out:
g_free (parse_data.context);
g_markup_parse_context_free (parse_context);
g_input_stream_close ((GInputStream*)input, NULL, NULL);
g_object_unref (input);
idle_clean_usage (self);
if (error)
{
g_warning ("Could not load applications usage data: %s", error->message);
g_error_free (error);
}
}
/* Enable or disable the timers, depending on the value of ENABLE_MONITORING_KEY
* and taking care of the previous state. If selfing is disabled, we still
* report apps usage based on (possibly) saved data, but don't collect data.
*/
static void
update_enable_monitoring (ShellAppUsage *self)
{
ShellGlobal *global;
gboolean enable;
global = shell_global_get ();
enable = g_settings_get_boolean (shell_global_get_settings (global),
ENABLE_MONITORING_KEY);
/* Be sure not to start the timers if they were already set */
if (enable && !self->enable_monitoring)
{
on_focus_app_changed (shell_window_tracker_get_default (), NULL, self);
}
/* ...and don't try to stop them if they were not running */
else if (!enable && self->enable_monitoring)
{
if (self->watched_app)
g_object_unref (self->watched_app);
self->watched_app = NULL;
if (self->save_id)
{
g_source_remove (self->save_id);
self->save_id = 0;
}
}
self->enable_monitoring = enable;
}
/* Called when the ENABLE_MONITORING_KEY boolean has changed */
static void
on_enable_monitoring_key_changed (GSettings *settings,
const gchar *key,
ShellAppUsage *self)
{
update_enable_monitoring (self);
}
/**
* shell_app_usage_get_default:
*
* Return Value: (transfer none): The global #ShellAppUsage instance
*/
ShellAppUsage *
shell_app_usage_get_default ()
{
static ShellAppUsage *instance;
if (instance == NULL)
instance = g_object_new (SHELL_TYPE_APP_USAGE, NULL);
return instance;
}
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