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gnome-shell/src/shell-window-tracker.c

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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 <meta/display.h>
#include <meta/group.h>
#include <meta/util.h>
#include <meta/window.h>
#define SN_API_NOT_YET_FROZEN 1
#include <libsn/sn.h>
#include "shell-window-tracker-private.h"
#include "shell-app-private.h"
#include "shell-global.h"
#include "st.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-window-tracker
* @short_description: Associate windows with applications
*
* Maintains a mapping from windows to applications (.desktop file ids).
* It currently implements this with some heuristics on the WM_CLASS X11
* property (and some static override regexps); in the future, we want to
* have it also track through startup-notification.
*/
struct _ShellWindowTracker
{
GObject parent;
ShellApp *focus_app;
/* <MetaWindow * window, ShellApp *app> */
GHashTable *window_to_app;
/* <int, ShellApp *app> */
GHashTable *launched_pid_to_app;
};
G_DEFINE_TYPE (ShellWindowTracker, shell_window_tracker, G_TYPE_OBJECT);
enum {
PROP_0,
PROP_FOCUS_APP
};
enum {
STARTUP_SEQUENCE_CHANGED,
TRACKED_WINDOWS_CHANGED,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
static void shell_window_tracker_finalize (GObject *object);
static void set_focus_app (ShellWindowTracker *tracker,
ShellApp *new_focus_app);
static void on_focus_window_changed (MetaDisplay *display, GParamSpec *spec, ShellWindowTracker *tracker);
static void track_window (ShellWindowTracker *tracker, MetaWindow *window);
static void disassociate_window (ShellWindowTracker *tracker, MetaWindow *window);
static void
shell_window_tracker_get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ShellWindowTracker *tracker = SHELL_WINDOW_TRACKER (gobject);
switch (prop_id)
{
case PROP_FOCUS_APP:
g_value_set_object (value, tracker->focus_app);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
shell_window_tracker_class_init (ShellWindowTrackerClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->get_property = shell_window_tracker_get_property;
gobject_class->finalize = shell_window_tracker_finalize;
g_object_class_install_property (gobject_class,
PROP_FOCUS_APP,
g_param_spec_object ("focus-app",
"Focus App",
"Focused application",
SHELL_TYPE_APP,
G_PARAM_READABLE));
signals[STARTUP_SEQUENCE_CHANGED] = g_signal_new ("startup-sequence-changed",
SHELL_TYPE_WINDOW_TRACKER,
G_SIGNAL_RUN_LAST,
0,
NULL, NULL, NULL,
G_TYPE_NONE, 1, SHELL_TYPE_STARTUP_SEQUENCE);
signals[TRACKED_WINDOWS_CHANGED] = g_signal_new ("tracked-windows-changed",
SHELL_TYPE_WINDOW_TRACKER,
G_SIGNAL_RUN_LAST,
0,
NULL, NULL, NULL,
G_TYPE_NONE, 0);
}
/**
* get_appid_from_window:
*
* Turn the WM_CLASS property into our best guess at a .desktop file id.
*/
static char *
get_appid_from_window (MetaWindow *window)
{
const char *wmclass;
char *appid_guess;
wmclass = meta_window_get_wm_class (window);
if (!wmclass)
return NULL;
appid_guess = g_ascii_strdown (wmclass, -1);
/* This handles "Fedora Eclipse", probably others.
* Note g_strdelimit is modify-in-place. */
g_strdelimit (appid_guess, " ", '-');
return appid_guess;
}
/**
* shell_window_tracker_is_window_interesting:
*
* The ShellWindowTracker associates certain kinds of windows with
* applications; however, others we don't want to
* appear in places where we want to give a list of windows
* for an application, such as the alt-tab dialog.
*
* An example of a window we don't want to show is the root
* desktop window. We skip all override-redirect types, and also
* exclude other window types like tooltip explicitly, though generally
* most of these should be override-redirect.
*
* Returns: %TRUE iff a window is "interesting"
*/
gboolean
shell_window_tracker_is_window_interesting (MetaWindow *window)
{
if (meta_window_is_override_redirect (window)
|| meta_window_is_skip_taskbar (window))
return FALSE;
switch (meta_window_get_window_type (window))
{
/* Definitely ignore these. */
case META_WINDOW_DESKTOP:
case META_WINDOW_DOCK:
case META_WINDOW_SPLASHSCREEN:
/* Should have already been handled by override_redirect above,
* but explicitly list here so we get the "unhandled enum"
* warning if in the future anything is added.*/
case META_WINDOW_DROPDOWN_MENU:
case META_WINDOW_POPUP_MENU:
case META_WINDOW_TOOLTIP:
case META_WINDOW_NOTIFICATION:
case META_WINDOW_COMBO:
case META_WINDOW_DND:
case META_WINDOW_OVERRIDE_OTHER:
return FALSE;
case META_WINDOW_NORMAL:
case META_WINDOW_DIALOG:
case META_WINDOW_MODAL_DIALOG:
case META_WINDOW_MENU:
case META_WINDOW_TOOLBAR:
case META_WINDOW_UTILITY:
break;
}
return TRUE;
}
/**
* get_app_from_window_wmclass:
*
* Looks only at the given window, and attempts to determine
* an application based on WM_CLASS. If one can't be determined,
* return %NULL.
*
* Return value: (transfer full): A newly-referenced #ShellApp, or %NULL
*/
static ShellApp *
get_app_from_window_wmclass (MetaWindow *window)
{
ShellApp *app;
ShellAppSystem *appsys;
char *wmclass;
char *with_desktop;
appsys = shell_app_system_get_default ();
wmclass = get_appid_from_window (window);
if (!wmclass)
return NULL;
with_desktop = g_strjoin (NULL, wmclass, ".desktop", NULL);
g_free (wmclass);
app = shell_app_system_lookup_heuristic_basename (appsys, with_desktop);
if (app != NULL)
g_object_ref (app);
g_free (with_desktop);
return app;
}
/**
* get_app_from_window_group:
* @monitor: a #ShellWindowTracker
* @window: a #MetaWindow
*
* Check other windows in the group for @window to see if we have
* an application for one of them.
*
* Return value: (transfer full): A newly-referenced #ShellApp, or %NULL
*/
static ShellApp*
get_app_from_window_group (ShellWindowTracker *tracker,
MetaWindow *window)
{
ShellApp *result;
GSList *group_windows;
MetaGroup *group;
GSList *iter;
group = meta_window_get_group (window);
if (group == NULL)
return NULL;
group_windows = meta_group_list_windows (group);
result = NULL;
/* Try finding a window in the group of type NORMAL; if we
* succeed, use that as our source. */
for (iter = group_windows; iter; iter = iter->next)
{
MetaWindow *group_window = iter->data;
if (meta_window_get_window_type (group_window) != META_WINDOW_NORMAL)
continue;
result = g_hash_table_lookup (tracker->window_to_app, group_window);
if (result)
break;
}
g_slist_free (group_windows);
if (result)
g_object_ref (result);
return result;
}
/**
* get_app_from_window_pid:
* @tracker: a #ShellWindowTracker
* @window: a #MetaWindow
*
* Check if the pid associated with @window corresponds to an
* application we launched.
*
* Return value: (transfer full): A newly-referenced #ShellApp, or %NULL
*/
static ShellApp *
get_app_from_window_pid (ShellWindowTracker *tracker,
MetaWindow *window)
{
ShellApp *result;
int pid;
if (meta_window_is_remote (window))
return NULL;
pid = meta_window_get_pid (window);
if (pid == -1)
return NULL;
result = g_hash_table_lookup (tracker->launched_pid_to_app, GINT_TO_POINTER (pid));
if (result != NULL)
g_object_ref (result);
return result;
}
/**
* get_app_for_window:
*
* Determines the application associated with a window, using
* all available information such as the window's MetaGroup,
* and what we know about other windows.
*
* Returns: (transfer full): a #ShellApp, or NULL if none is found
*/
static ShellApp *
get_app_for_window (ShellWindowTracker *tracker,
MetaWindow *window)
{
ShellApp *result = NULL;
const char *startup_id;
/* First, we check whether we already know about this window,
* if so, just return that.
*/
if (meta_window_get_window_type (window) == META_WINDOW_NORMAL
|| meta_window_is_remote (window))
{
result = g_hash_table_lookup (tracker->window_to_app, window);
if (result != NULL)
{
g_object_ref (result);
return result;
}
}
if (meta_window_is_remote (window))
return _shell_app_new_for_window (window);
/* Check if the app's WM_CLASS specifies an app; this is
* canonical if it does.
*/
result = get_app_from_window_wmclass (window);
if (result != NULL)
return result;
result = get_app_from_window_pid (tracker, window);
if (result != NULL)
return result;
/* Now we check whether we have a match through startup-notification */
startup_id = meta_window_get_startup_id (window);
if (startup_id)
{
GSList *iter, *sequences;
sequences = shell_window_tracker_get_startup_sequences (tracker);
for (iter = sequences; iter; iter = iter->next)
{
ShellStartupSequence *sequence = iter->data;
const char *id = shell_startup_sequence_get_id (sequence);
if (strcmp (id, startup_id) != 0)
continue;
result = shell_startup_sequence_get_app (sequence);
if (result)
{
result = g_object_ref (result);
break;
}
}
}
/* If we didn't get a startup-notification match, see if we matched
* any other windows in the group.
*/
if (result == NULL)
result = get_app_from_window_group (tracker, window);
/* Our last resort - we create a fake app from the window */
if (result == NULL)
result = _shell_app_new_for_window (window);
return result;
}
const char *
_shell_window_tracker_get_app_context (ShellWindowTracker *tracker, ShellApp *app)
{
return "";
}
static void
update_focus_app (ShellWindowTracker *self)
{
MetaWindow *new_focus_win;
ShellApp *new_focus_app;
new_focus_win = meta_display_get_focus_window (shell_global_get_display (shell_global_get ()));
new_focus_app = new_focus_win ? shell_window_tracker_get_window_app (self, new_focus_win) : NULL;
if (new_focus_app)
shell_app_update_window_actions (new_focus_app, new_focus_win);
set_focus_app (self, new_focus_app);
}
static void
on_wm_class_changed (MetaWindow *window,
GParamSpec *pspec,
gpointer user_data)
{
ShellWindowTracker *self = SHELL_WINDOW_TRACKER (user_data);
/* It's simplest to just treat this as a remove + add. */
disassociate_window (self, window);
track_window (self, window);
/* also just recaulcuate the focused app, in case it was the focused
window that changed */
update_focus_app (self);
}
static void
track_window (ShellWindowTracker *self,
MetaWindow *window)
{
ShellApp *app;
if (!shell_window_tracker_is_window_interesting (window))
return;
app = get_app_for_window (self, window);
if (!app)
return;
/* At this point we've stored the association from window -> application */
g_hash_table_insert (self->window_to_app, window, app);
g_signal_connect (window, "notify::wm-class", G_CALLBACK (on_wm_class_changed), self);
_shell_app_add_window (app, window);
g_signal_emit (self, signals[TRACKED_WINDOWS_CHANGED], 0);
}
static void
shell_window_tracker_on_window_added (MetaWorkspace *workspace,
MetaWindow *window,
gpointer user_data)
{
ShellWindowTracker *self = SHELL_WINDOW_TRACKER (user_data);
track_window (self, window);
}
static void
disassociate_window (ShellWindowTracker *self,
MetaWindow *window)
{
ShellApp *app;
app = g_hash_table_lookup (self->window_to_app, window);
if (!app)
return;
g_object_ref (app);
g_hash_table_remove (self->window_to_app, window);
if (shell_window_tracker_is_window_interesting (window))
{
_shell_app_remove_window (app, window);
g_signal_handlers_disconnect_by_func (window, G_CALLBACK(on_wm_class_changed), self);
}
g_signal_emit (self, signals[TRACKED_WINDOWS_CHANGED], 0);
g_object_unref (app);
}
static void
shell_window_tracker_on_window_removed (MetaWorkspace *workspace,
MetaWindow *window,
gpointer user_data)
{
disassociate_window (SHELL_WINDOW_TRACKER (user_data), window);
}
static void
load_initial_windows (ShellWindowTracker *tracker)
{
GList *workspaces, *iter;
MetaScreen *screen = shell_global_get_screen (shell_global_get ());
workspaces = meta_screen_get_workspaces (screen);
for (iter = workspaces; iter; iter = iter->next)
{
MetaWorkspace *workspace = iter->data;
GList *windows = meta_workspace_list_windows (workspace);
GList *window_iter;
for (window_iter = windows; window_iter; window_iter = window_iter->next)
{
MetaWindow *window = window_iter->data;
track_window (tracker, window);
}
g_list_free (windows);
}
}
static void
shell_window_tracker_on_n_workspaces_changed (MetaScreen *screen,
GParamSpec *pspec,
gpointer user_data)
{
ShellWindowTracker *self = SHELL_WINDOW_TRACKER (user_data);
GList *workspaces, *iter;
workspaces = meta_screen_get_workspaces (screen);
for (iter = workspaces; iter; iter = iter->next)
{
MetaWorkspace *workspace = iter->data;
/* This pair of disconnect/connect is idempotent if we were
* already connected, while ensuring we get connected for
* new workspaces.
*/
g_signal_handlers_disconnect_by_func (workspace,
shell_window_tracker_on_window_added,
self);
g_signal_handlers_disconnect_by_func (workspace,
shell_window_tracker_on_window_removed,
self);
g_signal_connect (workspace, "window-added",
G_CALLBACK (shell_window_tracker_on_window_added), self);
g_signal_connect (workspace, "window-removed",
G_CALLBACK (shell_window_tracker_on_window_removed), self);
}
}
static void
init_window_tracking (ShellWindowTracker *self)
{
MetaDisplay *display;
MetaScreen *screen = shell_global_get_screen (shell_global_get ());
g_signal_connect (screen, "notify::n-workspaces",
G_CALLBACK (shell_window_tracker_on_n_workspaces_changed), self);
display = meta_screen_get_display (screen);
g_signal_connect (display, "notify::focus-window",
G_CALLBACK (on_focus_window_changed), self);
shell_window_tracker_on_n_workspaces_changed (screen, NULL, self);
}
static void
on_startup_sequence_changed (MetaScreen *screen,
SnStartupSequence *sequence,
ShellWindowTracker *self)
{
ShellApp *app;
app = shell_startup_sequence_get_app ((ShellStartupSequence*)sequence);
if (app)
_shell_app_handle_startup_sequence (app, sequence);
g_signal_emit (G_OBJECT (self), signals[STARTUP_SEQUENCE_CHANGED], 0, sequence);
}
static void
shell_window_tracker_init (ShellWindowTracker *self)
{
MetaScreen *screen;
self->window_to_app = g_hash_table_new_full (g_direct_hash, g_direct_equal,
NULL, (GDestroyNotify) g_object_unref);
self->launched_pid_to_app = g_hash_table_new_full (NULL, NULL, NULL, (GDestroyNotify) g_object_unref);
screen = shell_global_get_screen (shell_global_get ());
g_signal_connect (G_OBJECT (screen), "startup-sequence-changed",
G_CALLBACK (on_startup_sequence_changed), self);
load_initial_windows (self);
init_window_tracking (self);
}
static void
shell_window_tracker_finalize (GObject *object)
{
ShellWindowTracker *self = SHELL_WINDOW_TRACKER (object);
g_hash_table_destroy (self->window_to_app);
g_hash_table_destroy (self->launched_pid_to_app);
G_OBJECT_CLASS (shell_window_tracker_parent_class)->finalize(object);
}
/**
* shell_window_tracker_get_window_app:
* @tracker: An app monitor instance
* @metawin: A #MetaWindow
*
* Returns: (transfer full): Application associated with window
*/
ShellApp *
shell_window_tracker_get_window_app (ShellWindowTracker *tracker,
MetaWindow *metawin)
{
MetaWindow *transient_for;
ShellApp *app;
transient_for = meta_window_get_transient_for (metawin);
if (transient_for != NULL)
metawin = transient_for;
app = g_hash_table_lookup (tracker->window_to_app, metawin);
if (app)
g_object_ref (app);
return app;
}
/**
* shell_window_tracker_get_app_from_pid:
* @tracker: A #ShellAppSystem
* @pid: A Unix process identifier
*
* Look up the application corresponding to a process.
*
* Returns: (transfer none): A #ShellApp, or %NULL if none
*/
ShellApp *
shell_window_tracker_get_app_from_pid (ShellWindowTracker *tracker,
int pid)
{
GSList *running = shell_app_system_get_running (shell_app_system_get_default());
GSList *iter;
ShellApp *result = NULL;
for (iter = running; iter; iter = iter->next)
{
ShellApp *app = iter->data;
GSList *pids = shell_app_get_pids (app);
GSList *pids_iter;
for (pids_iter = pids; pids_iter; pids_iter = pids_iter->next)
{
int app_pid = GPOINTER_TO_INT (pids_iter->data);
if (app_pid == pid)
{
result = app;
break;
}
}
g_slist_free (pids);
if (result != NULL)
break;
}
g_slist_free (running);
return result;
}
static void
on_child_exited (GPid pid,
gint status,
gpointer unused_data)
{
ShellWindowTracker *tracker;
tracker = shell_window_tracker_get_default ();
g_hash_table_remove (tracker->launched_pid_to_app, GINT_TO_POINTER((gint)pid));
}
void
_shell_window_tracker_add_child_process_app (ShellWindowTracker *tracker,
GPid pid,
ShellApp *app)
{
gpointer pid_ptr = GINT_TO_POINTER((int)pid);
if (g_hash_table_lookup (tracker->launched_pid_to_app,
&pid_ptr))
return;
g_hash_table_insert (tracker->launched_pid_to_app,
pid_ptr,
g_object_ref (app));
g_child_watch_add (pid, on_child_exited, NULL);
/* TODO: rescan unassociated windows
* Unlikely in practice that the launched app gets ahead of us
* enough to map an X window before we get scheduled after the fork(),
* but adding this note for future reference.
*/
}
static void
set_focus_app (ShellWindowTracker *tracker,
ShellApp *new_focus_app)
{
if (new_focus_app == tracker->focus_app)
return;
if (tracker->focus_app != NULL)
g_object_unref (tracker->focus_app);
tracker->focus_app = new_focus_app;
if (tracker->focus_app != NULL)
g_object_ref (tracker->focus_app);
g_object_notify (G_OBJECT (tracker), "focus-app");
}
static void
on_focus_window_changed (MetaDisplay *display,
GParamSpec *spec,
ShellWindowTracker *tracker)
{
update_focus_app (tracker);
}
/**
* shell_window_tracker_get_startup_sequences:
* @self:
*
* Returns: (transfer none) (element-type ShellStartupSequence): Currently active startup sequences
*/
GSList *
shell_window_tracker_get_startup_sequences (ShellWindowTracker *self)
{
ShellGlobal *global = shell_global_get ();
MetaScreen *screen = shell_global_get_screen (global);
return meta_screen_get_startup_sequences (screen);
}
/* sn_startup_sequence_ref returns void, so make a
* wrapper which returns self */
static SnStartupSequence *
sequence_ref (SnStartupSequence *sequence)
{
sn_startup_sequence_ref (sequence);
return sequence;
}
GType
shell_startup_sequence_get_type (void)
{
static GType gtype = G_TYPE_INVALID;
if (gtype == G_TYPE_INVALID)
{
gtype = g_boxed_type_register_static ("ShellStartupSequence",
(GBoxedCopyFunc)sequence_ref,
(GBoxedFreeFunc)sn_startup_sequence_unref);
}
return gtype;
}
const char *
shell_startup_sequence_get_id (ShellStartupSequence *sequence)
{
return sn_startup_sequence_get_id ((SnStartupSequence*)sequence);
}
/**
* shell_startup_sequence_get_app:
* @sequence: A #ShellStartupSequence
*
* Returns: (transfer none): The application being launched, or %NULL if unknown.
*/
ShellApp *
shell_startup_sequence_get_app (ShellStartupSequence *sequence)
{
const char *appid;
ShellAppSystem *appsys;
ShellApp *app;
appid = sn_startup_sequence_get_application_id ((SnStartupSequence*)sequence);
if (!appid)
return NULL;
appsys = shell_app_system_get_default ();
app = shell_app_system_lookup_app_for_path (appsys, appid);
return app;
}
const char *
shell_startup_sequence_get_name (ShellStartupSequence *sequence)
{
return sn_startup_sequence_get_name ((SnStartupSequence*)sequence);
}
gboolean
shell_startup_sequence_get_completed (ShellStartupSequence *sequence)
{
return sn_startup_sequence_get_completed ((SnStartupSequence*)sequence);
}
/**
* shell_startup_sequence_create_icon:
* @sequence:
* @size: Size in pixels of icon
*
* Returns: (transfer none): A new #ClutterTexture containing an icon for the sequence
*/
ClutterActor *
shell_startup_sequence_create_icon (ShellStartupSequence *sequence, guint size)
{
GIcon *themed;
const char *icon_name;
ClutterActor *texture;
icon_name = sn_startup_sequence_get_icon_name ((SnStartupSequence*)sequence);
if (!icon_name)
{
texture = clutter_texture_new ();
clutter_actor_set_size (texture, size, size);
return texture;
}
themed = g_themed_icon_new (icon_name);
texture = st_texture_cache_load_gicon (st_texture_cache_get_default (),
NULL, themed, size);
g_object_unref (G_OBJECT (themed));
return texture;
}
/**
* shell_window_tracker_get_default:
*
* Return Value: (transfer none): The global #ShellWindowTracker instance
*/
ShellWindowTracker *
shell_window_tracker_get_default ()
{
static ShellWindowTracker *instance;
if (instance == NULL)
instance = g_object_new (SHELL_TYPE_WINDOW_TRACKER, NULL);
return instance;
}
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