/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ #include "config.h" #include #include #include #include #include #include #include #include #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; /* */ GHashTable *window_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 ShellApp * shell_startup_sequence_get_app (MetaStartupSequence *sequence); 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 | G_PARAM_STATIC_STRINGS)); 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, META_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); } static gboolean check_app_id_prefix (ShellApp *app, const char *prefix) { if (prefix == NULL) return TRUE; return g_str_has_prefix (shell_app_get_id (app), prefix); } /* * 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; const char *wm_class; const char *wm_instance; const char *sandbox_id; g_autofree char *app_prefix = NULL; appsys = shell_app_system_get_default (); sandbox_id = meta_window_get_sandboxed_app_id (window); if (sandbox_id) app_prefix = g_strdup_printf ("%s.", sandbox_id); /* Notes on the heuristics used here: much of the complexity here comes from the desire to support Chrome apps. From https://bugzilla.gnome.org/show_bug.cgi?id=673657#c13 Currently chrome sets WM_CLASS as follows (the first string is the 'instance', the second one is the 'class': For the normal browser: WM_CLASS(STRING) = "chromium", "Chromium" For a bookmarked page (through 'Tools -> Create application shortcuts') WM_CLASS(STRING) = "wiki.gnome.org__GnomeShell_ApplicationBased", "Chromium" For an application from the chrome store (with a .desktop file created through right click, "Create shortcuts" from Chrome's apps overview) WM_CLASS(STRING) = "crx_blpcfgokakmgnkcojhhkbfbldkacnbeo", "Chromium" The .desktop file has a matching StartupWMClass, but the name differs, e.g. for the store app (youtube) there is .local/share/applications/chrome-blpcfgokakmgnkcojhhkbfbldkacnbeo-Default.desktop with StartupWMClass=crx_blpcfgokakmgnkcojhhkbfbldkacnbeo Note that chromium (but not google-chrome!) includes a StartupWMClass=chromium in their .desktop file, so we must match the instance first. Also note that in the good case (regular gtk+ app without hacks), instance and class are the same except for case and there is no StartupWMClass at all. */ /* first try a match from WM_CLASS (instance part) to StartupWMClass */ wm_instance = meta_window_get_wm_class_instance (window); app = shell_app_system_lookup_startup_wmclass (appsys, wm_instance); if (app != NULL && check_app_id_prefix (app, app_prefix)) return g_object_ref (app); /* then try a match from WM_CLASS to StartupWMClass */ wm_class = meta_window_get_wm_class (window); app = shell_app_system_lookup_startup_wmclass (appsys, wm_class); if (app != NULL && check_app_id_prefix (app, app_prefix)) return g_object_ref (app); /* then try a match from WM_CLASS (instance part) to .desktop */ app = shell_app_system_lookup_desktop_wmclass (appsys, wm_instance); if (app != NULL && check_app_id_prefix (app, app_prefix)) return g_object_ref (app); /* finally, try a match from WM_CLASS to .desktop */ app = shell_app_system_lookup_desktop_wmclass (appsys, wm_class); if (app != NULL && check_app_id_prefix (app, app_prefix)) return g_object_ref (app); return NULL; } /* * get_app_from_id: * @window: a #MetaWindow * * Looks only at the given window, and attempts to determine * an application based on %id. If one can't be determined, * return %NULL. * * Return value: (transfer full): A newly-referenced #ShellApp, or %NULL */ static ShellApp * get_app_from_id (MetaWindow *window, const char *id) { ShellApp *app; ShellAppSystem *appsys; g_autofree char *desktop_file = NULL; g_return_val_if_fail (id != NULL, NULL); appsys = shell_app_system_get_default (); desktop_file = g_strconcat (id, ".desktop", NULL); app = shell_app_system_lookup_app (appsys, desktop_file); if (app) return g_object_ref (app); return NULL; } /* * get_app_from_gapplication_id: * @window: a #MetaWindow * * Looks only at the given window, and attempts to determine * an application based on _GTK_APPLICATION_ID. If one can't be determined, * return %NULL. * * Return value: (transfer full): A newly-referenced #ShellApp, or %NULL */ static ShellApp * get_app_from_gapplication_id (MetaWindow *window) { const char *id; id = meta_window_get_gtk_application_id (window); if (!id) return NULL; return get_app_from_id (window, id); } /* * get_app_from_sandboxed_app_id: * @window: a #MetaWindow * * Looks only at the given window, and attempts to determine * an application based on its Flatpak or Snap ID. If one can't be determined, * return %NULL. * * Return value: (transfer full): A newly-referenced #ShellApp, or %NULL */ static ShellApp * get_app_from_sandboxed_app_id (MetaWindow *window) { const char *id; id = meta_window_get_sandboxed_app_id (window); if (!id) return NULL; return get_app_from_id (window, id); } /* * 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. * * Return value: (transfer full): A newly-referenced #ShellApp, or %NULL */ static ShellApp * get_app_from_window_pid (ShellWindowTracker *tracker, MetaWindow *window) { ShellApp *result; pid_t pid; if (meta_window_is_remote (window)) return NULL; pid = meta_window_get_pid (window); if (pid < 1) return NULL; result = shell_window_tracker_get_app_from_pid (tracker, 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; MetaWindow *transient_for; const char *startup_id; transient_for = meta_window_get_transient_for (window); if (transient_for != NULL) return get_app_for_window (tracker, transient_for); /* 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; /* Check if the window was opened from within a sandbox; if this * is the case, a corresponding .desktop file is guaranteed to match; */ result = get_app_from_sandboxed_app_id (window); if (result != NULL) return result; /* Check if the window has a GApplication ID attached; this is * canonical if it does */ result = get_app_from_gapplication_id (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) { MetaStartupSequence *sequence = iter->data; const char *id = meta_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; } 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 ())); /* we only consider an app focused if the focus window can be clearly * associated with a running app; this is the case if the focus window * or one of its parents is visible in the taskbar, e.g. * - 'nautilus' should appear focused when its about dialog has focus * - 'nautilus' should not appear focused when the DESKTOP has focus */ while (new_focus_win && meta_window_is_skip_taskbar (new_focus_win)) new_focus_win = meta_window_get_transient_for (new_focus_win); 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); shell_app_update_app_actions (new_focus_app, new_focus_win); } set_focus_app (self, new_focus_app); g_clear_object (&new_focus_app); } static void tracked_window_changed (ShellWindowTracker *self, MetaWindow *window) { /* It's simplest to just treat this as a remove + add. */ disassociate_window (self, window); track_window (self, window); /* also just recalculate the focused app, in case it was the focused window that changed */ update_focus_app (self); } static void on_wm_class_changed (MetaWindow *window, GParamSpec *pspec, gpointer user_data) { ShellWindowTracker *self = SHELL_WINDOW_TRACKER (user_data); tracked_window_changed (self, window); } static void on_gtk_application_id_changed (MetaWindow *window, GParamSpec *pspec, gpointer user_data) { ShellWindowTracker *self = SHELL_WINDOW_TRACKER (user_data); tracked_window_changed (self, window); } static void track_window (ShellWindowTracker *self, MetaWindow *window) { ShellApp *app; 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); g_signal_connect (window, "notify::gtk-application-id", G_CALLBACK (on_gtk_application_id_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) { track_window (SHELL_WINDOW_TRACKER (user_data), 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); _shell_app_remove_window (app, window); g_signal_handlers_disconnect_by_func (window, G_CALLBACK (on_wm_class_changed), self); g_signal_handlers_disconnect_by_func (window, G_CALLBACK (on_gtk_application_id_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) { MetaDisplay *display = shell_global_get_display (shell_global_get ()); MetaWorkspaceManager *workspace_manager = meta_display_get_workspace_manager (display); GList *workspaces; GList *l; workspaces = meta_workspace_manager_get_workspaces (workspace_manager); for (l = workspaces; l; l = l->next) { MetaWorkspace *workspace = l->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 (MetaWorkspaceManager *workspace_manager, GParamSpec *pspec, gpointer user_data) { ShellWindowTracker *self = SHELL_WINDOW_TRACKER (user_data); GList *workspaces; GList *l; workspaces = meta_workspace_manager_get_workspaces (workspace_manager); for (l = workspaces; l; l = l->next) { MetaWorkspace *workspace = l->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 = shell_global_get_display (shell_global_get ()); MetaWorkspaceManager *workspace_manager = meta_display_get_workspace_manager (display); g_signal_connect (workspace_manager, "notify::n-workspaces", G_CALLBACK (shell_window_tracker_on_n_workspaces_changed), self); g_signal_connect (display, "notify::focus-window", G_CALLBACK (on_focus_window_changed), self); shell_window_tracker_on_n_workspaces_changed (workspace_manager, NULL, self); } static void on_startup_sequence_changed (MetaStartupNotification *sn, MetaStartupSequence *sequence, ShellWindowTracker *self) { ShellApp *app; app = shell_startup_sequence_get_app (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) { MetaDisplay *display = shell_global_get_display (shell_global_get ()); MetaStartupNotification *sn = meta_display_get_startup_notification (display); self->window_to_app = g_hash_table_new_full (g_direct_hash, g_direct_equal, NULL, (GDestroyNotify) g_object_unref); g_signal_connect (sn, "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_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) { ShellApp *app; 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 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: * @tracker: * * Returns: (transfer none) (element-type MetaStartupSequence): Currently active startup sequences */ GSList * shell_window_tracker_get_startup_sequences (ShellWindowTracker *self) { ShellGlobal *global = shell_global_get (); MetaDisplay *display = shell_global_get_display (global); MetaStartupNotification *sn = meta_display_get_startup_notification (display); return meta_startup_notification_get_sequences (sn); } static ShellApp * shell_startup_sequence_get_app (MetaStartupSequence *sequence) { const char *appid; char *basename; ShellAppSystem *appsys; ShellApp *app; appid = meta_startup_sequence_get_application_id (sequence); if (!appid) return NULL; basename = g_path_get_basename (appid); appsys = shell_app_system_get_default (); app = shell_app_system_lookup_app (appsys, basename); g_free (basename); return app; } /** * shell_window_tracker_get_default: * * Return Value: (transfer none): The global #ShellWindowTracker instance */ ShellWindowTracker * shell_window_tracker_get_default (void) { static ShellWindowTracker *instance; if (instance == NULL) instance = g_object_new (SHELL_TYPE_WINDOW_TRACKER, NULL); return instance; }