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Diffstat (limited to 'src/shell-window-tracker.c')
| -rw-r--r-- | src/shell-window-tracker.c | 850 |
1 files changed, 850 insertions, 0 deletions
diff --git a/src/shell-window-tracker.c b/src/shell-window-tracker.c new file mode 100644 index 0000000..5c9d2ec --- /dev/null +++ b/src/shell-window-tracker.c @@ -0,0 +1,850 @@ +/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ + +#include "config.h" + +#include <string.h> +#include <stdlib.h> + +#include <meta/display.h> +#include <meta/group.h> +#include <meta/util.h> +#include <meta/window.h> +#include <meta/meta-workspace-manager.h> +#include <meta/meta-startup-notification.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; +}; + +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) +{ + ShellWindowTracker *self = SHELL_WINDOW_TRACKER (user_data); + MetaWindowType window_type = meta_window_get_window_type (window); + + if (window_type == META_WINDOW_NORMAL || + window_type == META_WINDOW_DIALOG || + window_type == META_WINDOW_UTILITY || + window_type == META_WINDOW_MODAL_DIALOG) + 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); + + _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; +} |