2 * vim:ts=4:sw=4:expandtab
9 static int xkb_event_base;
11 int xkb_current_group;
17 xcb_connection_t *conn;
18 xcb_event_handlers_t evenths;
19 xcb_property_handlers_t prophs;
20 xcb_atom_t atoms[NUM_ATOMS];
25 xcb_key_symbols_t *keysyms;
27 /* Those are our connections to X11 for use with libXcursor and XKB */
28 Display *xlibdpy, *xkbdpy;
30 /* The list of key bindings */
31 struct bindings_head *bindings;
33 /* The list of exec-lines */
34 struct autostarts_head autostarts = TAILQ_HEAD_INITIALIZER(autostarts);
36 /* The list of assignments */
37 struct assignments_head assignments = TAILQ_HEAD_INITIALIZER(assignments);
39 /* We hope that those are supported and set them to true */
40 bool xcursor_supported = true;
41 bool xkb_supported = true;
44 * This callback is only a dummy, see xcb_prepare_cb and xcb_check_cb.
45 * See also man libev(3): "ev_prepare" and "ev_check" - customise your event loop
48 static void xcb_got_event(EV_P_ struct ev_io *w, int revents) {
49 /* empty, because xcb_prepare_cb and xcb_check_cb are used */
53 * Flush before blocking (and waiting for new events)
56 static void xcb_prepare_cb(EV_P_ ev_prepare *w, int revents) {
61 * Instead of polling the X connection socket we leave this to
62 * xcb_poll_for_event() which knows better than we can ever know.
65 static void xcb_check_cb(EV_P_ ev_check *w, int revents) {
66 xcb_generic_event_t *event;
68 while ((event = xcb_poll_for_event(conn)) != NULL) {
69 xcb_event_handle(&evenths, event);
76 * When using xmodmap to change the keyboard mapping, this event
77 * is only sent via XKB. Therefore, we need this special handler.
80 static void xkb_got_event(EV_P_ struct ev_io *w, int revents) {
81 DLOG("Handling XKB event\n");
84 /* When using xmodmap, every change (!) gets an own event.
85 * Therefore, we just read all events and only handle the
86 * mapping_notify once. */
87 bool mapping_changed = false;
88 while (XPending(xkbdpy)) {
89 XNextEvent(xkbdpy, (XEvent*)&ev);
90 /* While we should never receive a non-XKB event,
91 * better do sanity checking */
92 if (ev.type != xkb_event_base)
95 if (ev.any.xkb_type == XkbMapNotify) {
96 mapping_changed = true;
100 if (ev.any.xkb_type != XkbStateNotify) {
101 ELOG("Unknown XKB event received (type %d)\n", ev.any.xkb_type);
105 /* See The XKB Extension: Library Specification, section 14.1 */
106 /* We check if the current group (each group contains
107 * two levels) has been changed. Mode_switch activates
108 * group XkbGroup2Index */
109 if (xkb_current_group == ev.state.group)
112 xkb_current_group = ev.state.group;
114 if (ev.state.group == XkbGroup2Index) {
115 DLOG("Mode_switch enabled\n");
116 grab_all_keys(conn, true);
119 if (ev.state.group == XkbGroup1Index) {
120 DLOG("Mode_switch disabled\n");
121 ungrab_all_keys(conn);
122 grab_all_keys(conn, false);
126 if (!mapping_changed)
129 DLOG("Keyboard mapping changed, updating keybindings\n");
130 xcb_key_symbols_free(keysyms);
131 keysyms = xcb_key_symbols_alloc(conn);
133 xcb_get_numlock_mask(conn);
135 ungrab_all_keys(conn);
136 DLOG("Re-grabbing...\n");
138 grab_all_keys(conn, (xkb_current_group == XkbGroup2Index));
142 int main(int argc, char *argv[]) {
143 //parse_cmd("[ foo ] attach, attach ; focus");
145 char *override_configpath = NULL;
146 bool autostart = true;
147 char *layout_path = NULL;
148 bool delete_layout_path;
149 bool only_check_config = false;
150 bool force_xinerama = false;
151 xcb_intern_atom_cookie_t atom_cookies[NUM_ATOMS];
152 static struct option long_options[] = {
153 {"no-autostart", no_argument, 0, 'a'},
154 {"config", required_argument, 0, 'c'},
155 {"version", no_argument, 0, 'v'},
156 {"help", no_argument, 0, 'h'},
157 {"layout", required_argument, 0, 'L'},
158 {"restart", required_argument, 0, 0},
159 {"force-xinerama", no_argument, 0, 0},
162 int option_index = 0, opt;
164 setlocale(LC_ALL, "");
166 /* Disable output buffering to make redirects in .xsession actually useful for debugging */
167 if (!isatty(fileno(stdout)))
168 setbuf(stdout, NULL);
172 while ((opt = getopt_long(argc, argv, "c:CvaL:hld:V", long_options, &option_index)) != -1) {
175 LOG("Autostart disabled using -a\n");
180 layout_path = sstrdup(optarg);
181 delete_layout_path = false;
184 FREE(override_configpath);
185 override_configpath = sstrdup(optarg);
188 LOG("Checking configuration file only (-C)\n");
189 only_check_config = true;
192 printf("i3 version " I3_VERSION " © 2009 Michael Stapelberg and contributors\n");
198 LOG("Enabling debug loglevel %s\n", optarg);
199 add_loglevel(optarg);
202 /* DEPRECATED, ignored for the next 3 versions (3.e, 3.f, 3.g) */
205 if (strcmp(long_options[option_index].name, "force-xinerama") == 0) {
206 force_xinerama = true;
207 ELOG("Using Xinerama instead of RandR. This option should be "
208 "avoided at all cost because it does not refresh the list "
209 "of screens, so you cannot configure displays at runtime. "
210 "Please check if your driver really does not support RandR "
211 "and disable this option as soon as you can.\n");
213 } else if (strcmp(long_options[option_index].name, "restart") == 0) {
215 layout_path = sstrdup(optarg);
216 delete_layout_path = true;
221 fprintf(stderr, "Usage: %s [-c configfile] [-d loglevel] [-a] [-v] [-V] [-C]\n", argv[0]);
222 fprintf(stderr, "\n");
223 fprintf(stderr, "-a: disable autostart\n");
224 fprintf(stderr, "-L <layoutfile>: load the layout from <layoutfile>\n");
225 fprintf(stderr, "-v: display version and exit\n");
226 fprintf(stderr, "-V: enable verbose mode\n");
227 fprintf(stderr, "-d <loglevel>: enable debug loglevel <loglevel>\n");
228 fprintf(stderr, "-c <configfile>: use the provided configfile instead\n");
229 fprintf(stderr, "-C: check configuration file and exit\n");
230 fprintf(stderr, "--force-xinerama: Use Xinerama instead of RandR. This "
231 "option should only be used if you are stuck with the "
232 "nvidia closed source driver which does not support RandR.\n");
237 LOG("i3 (tree) version " I3_VERSION " starting\n");
239 conn = xcb_connect(NULL, &screens);
240 if (xcb_connection_has_error(conn))
241 errx(EXIT_FAILURE, "Cannot open display\n");
243 load_configuration(conn, override_configpath, false);
244 if (only_check_config) {
245 LOG("Done checking configuration file. Exiting.\n");
249 if (config.ipc_socket_path == NULL) {
250 config.ipc_socket_path = getenv("I3SOCK");
253 xcb_screen_t *root_screen = xcb_aux_get_screen(conn, screens);
254 root = root_screen->root;
255 root_depth = root_screen->root_depth;
257 uint32_t mask = XCB_CW_EVENT_MASK;
258 uint32_t values[] = { XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
259 XCB_EVENT_MASK_STRUCTURE_NOTIFY | /* when the user adds a screen (e.g. video
260 projector), the root window gets a
262 XCB_EVENT_MASK_POINTER_MOTION |
263 XCB_EVENT_MASK_PROPERTY_CHANGE |
264 XCB_EVENT_MASK_ENTER_WINDOW };
265 xcb_void_cookie_t cookie;
266 cookie = xcb_change_window_attributes_checked(conn, root, mask, values);
267 check_error(conn, cookie, "Another window manager seems to be running");
269 /* Place requests for the atoms we need as soon as possible */
270 #define REQUEST_ATOM(name) atom_cookies[name] = xcb_intern_atom(conn, 0, strlen(#name), #name);
272 REQUEST_ATOM(_NET_SUPPORTED);
273 REQUEST_ATOM(_NET_WM_STATE_FULLSCREEN);
274 REQUEST_ATOM(_NET_SUPPORTING_WM_CHECK);
275 REQUEST_ATOM(_NET_WM_NAME);
276 REQUEST_ATOM(_NET_WM_STATE);
277 REQUEST_ATOM(_NET_WM_WINDOW_TYPE);
278 REQUEST_ATOM(_NET_WM_DESKTOP);
279 REQUEST_ATOM(_NET_WM_WINDOW_TYPE_DOCK);
280 REQUEST_ATOM(_NET_WM_WINDOW_TYPE_DIALOG);
281 REQUEST_ATOM(_NET_WM_WINDOW_TYPE_UTILITY);
282 REQUEST_ATOM(_NET_WM_WINDOW_TYPE_TOOLBAR);
283 REQUEST_ATOM(_NET_WM_WINDOW_TYPE_SPLASH);
284 REQUEST_ATOM(_NET_WM_STRUT_PARTIAL);
285 REQUEST_ATOM(WM_PROTOCOLS);
286 REQUEST_ATOM(WM_DELETE_WINDOW);
287 REQUEST_ATOM(UTF8_STRING);
288 REQUEST_ATOM(WM_STATE);
289 REQUEST_ATOM(WM_CLIENT_LEADER);
290 REQUEST_ATOM(_NET_CURRENT_DESKTOP);
291 REQUEST_ATOM(_NET_ACTIVE_WINDOW);
292 REQUEST_ATOM(_NET_WORKAREA);
294 /* Initialize the Xlib connection */
295 xlibdpy = xkbdpy = XOpenDisplay(NULL);
297 /* Try to load the X cursors and initialize the XKB extension */
298 if (xlibdpy == NULL) {
299 ELOG("ERROR: XOpenDisplay() failed, disabling libXcursor/XKB support\n");
300 xcursor_supported = false;
301 xkb_supported = false;
302 } else if (fcntl(ConnectionNumber(xlibdpy), F_SETFD, FD_CLOEXEC) == -1) {
303 ELOG("Could not set FD_CLOEXEC on xkbdpy\n");
306 xcursor_load_cursors();
312 major = XkbMajorVersion,
313 minor = XkbMinorVersion;
315 if (fcntl(ConnectionNumber(xkbdpy), F_SETFD, FD_CLOEXEC) == -1) {
316 fprintf(stderr, "Could not set FD_CLOEXEC on xkbdpy\n");
321 if (!XkbQueryExtension(xkbdpy,&i1,&xkb_event_base,&errBase,&major,&minor)) {
322 fprintf(stderr, "XKB not supported by X-server\n");
325 /* end of ugliness */
327 if (!XkbSelectEvents(xkbdpy, XkbUseCoreKbd,
328 XkbMapNotifyMask | XkbStateNotifyMask,
329 XkbMapNotifyMask | XkbStateNotifyMask)) {
330 fprintf(stderr, "Could not set XKB event mask\n");
335 memset(&evenths, 0, sizeof(xcb_event_handlers_t));
336 memset(&prophs, 0, sizeof(xcb_property_handlers_t));
338 xcb_event_handlers_init(conn, &evenths);
339 xcb_property_handlers_init(&prophs, &evenths);
340 xcb_event_set_key_press_handler(&evenths, handle_key_press, NULL);
342 xcb_event_set_button_press_handler(&evenths, handle_button_press, NULL);
344 xcb_event_set_map_request_handler(&evenths, handle_map_request, NULL);
346 xcb_event_set_unmap_notify_handler(&evenths, handle_unmap_notify_event, NULL);
347 xcb_event_set_destroy_notify_handler(&evenths, handle_destroy_notify_event, NULL);
349 xcb_event_set_expose_handler(&evenths, handle_expose_event, NULL);
351 xcb_event_set_motion_notify_handler(&evenths, handle_motion_notify, NULL);
353 /* Enter window = user moved his mouse over the window */
354 xcb_event_set_enter_notify_handler(&evenths, handle_enter_notify, NULL);
356 /* Client message are sent to the root window. The only interesting client message
357 for us is _NET_WM_STATE, we honour _NET_WM_STATE_FULLSCREEN */
358 xcb_event_set_client_message_handler(&evenths, handle_client_message, NULL);
360 /* Configure request = window tried to change size on its own */
361 xcb_event_set_configure_request_handler(&evenths, handle_configure_request, NULL);
363 /* Setup NetWM atoms */
364 #define GET_ATOM(name) \
366 xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(conn, atom_cookies[name], NULL); \
368 ELOG("Could not get atom " #name "\n"); \
371 atoms[name] = reply->atom; \
375 GET_ATOM(_NET_SUPPORTED);
376 GET_ATOM(_NET_WM_STATE_FULLSCREEN);
377 GET_ATOM(_NET_SUPPORTING_WM_CHECK);
378 GET_ATOM(_NET_WM_NAME);
379 GET_ATOM(_NET_WM_STATE);
380 GET_ATOM(_NET_WM_WINDOW_TYPE);
381 GET_ATOM(_NET_WM_DESKTOP);
382 GET_ATOM(_NET_WM_WINDOW_TYPE_DOCK);
383 GET_ATOM(_NET_WM_WINDOW_TYPE_DIALOG);
384 GET_ATOM(_NET_WM_WINDOW_TYPE_UTILITY);
385 GET_ATOM(_NET_WM_WINDOW_TYPE_TOOLBAR);
386 GET_ATOM(_NET_WM_WINDOW_TYPE_SPLASH);
387 GET_ATOM(_NET_WM_STRUT_PARTIAL);
388 GET_ATOM(WM_PROTOCOLS);
389 GET_ATOM(WM_DELETE_WINDOW);
390 GET_ATOM(UTF8_STRING);
392 GET_ATOM(WM_CLIENT_LEADER);
393 GET_ATOM(_NET_CURRENT_DESKTOP);
394 GET_ATOM(_NET_ACTIVE_WINDOW);
395 GET_ATOM(_NET_WORKAREA);
397 /* Watch _NET_WM_NAME (title of the window encoded in UTF-8) */
398 xcb_property_set_handler(&prophs, atoms[_NET_WM_NAME], 128, handle_windowname_change, NULL);
400 /* Watch WM_HINTS (contains the urgent property) */
401 xcb_property_set_handler(&prophs, WM_HINTS, UINT_MAX, handle_hints, NULL);
403 /* Watch WM_NAME (title of the window encoded in COMPOUND_TEXT) */
404 xcb_watch_wm_name(&prophs, 128, handle_windowname_change_legacy, NULL);
406 /* Watch WM_NORMAL_HINTS (aspect ratio, size increments, …) */
407 xcb_property_set_handler(&prophs, WM_NORMAL_HINTS, UINT_MAX, handle_normal_hints, NULL);
409 /* Watch WM_CLIENT_LEADER (= logical parent window for toolbars etc.) */
410 xcb_property_set_handler(&prophs, atoms[WM_CLIENT_LEADER], UINT_MAX, handle_clientleader_change, NULL);
412 /* Watch WM_TRANSIENT_FOR property (to which client this popup window belongs) */
413 xcb_property_set_handler(&prophs, WM_TRANSIENT_FOR, UINT_MAX, handle_transient_for, NULL);
415 /* Set up the atoms we support */
416 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, atoms[_NET_SUPPORTED], ATOM, 32, 7, atoms);
417 /* Set up the window manager’s name */
418 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, atoms[_NET_SUPPORTING_WM_CHECK], WINDOW, 32, 1, &root);
419 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, atoms[_NET_WM_NAME], atoms[UTF8_STRING], 8, strlen("i3"), "i3");
421 keysyms = xcb_key_symbols_alloc(conn);
423 xcb_get_numlock_mask(conn);
426 grab_all_keys(conn, false);
428 bool needs_tree_init = true;
430 LOG("Trying to restore the layout from %s...", layout_path);
431 needs_tree_init = !tree_restore(layout_path);
432 if (delete_layout_path)
440 if (force_xinerama) {
443 DLOG("Checking for XRandR...\n");
444 randr_init(&randr_base);
446 xcb_event_set_handler(&evenths,
447 randr_base + XCB_RANDR_SCREEN_CHANGE_NOTIFY,
448 handle_screen_change,
454 struct ev_loop *loop = ev_loop_new(0);
456 die("Could not initialize libev. Bad LIBEV_FLAGS?\n");
458 /* Create the UNIX domain socket for IPC */
459 if (config.ipc_socket_path != NULL) {
460 int ipc_socket = ipc_create_socket(config.ipc_socket_path);
461 if (ipc_socket == -1) {
462 ELOG("Could not create the IPC socket, IPC disabled\n");
464 struct ev_io *ipc_io = scalloc(sizeof(struct ev_io));
465 ev_io_init(ipc_io, ipc_new_client, ipc_socket, EV_READ);
466 ev_io_start(loop, ipc_io);
470 struct ev_io *xcb_watcher = scalloc(sizeof(struct ev_io));
471 struct ev_io *xkb = scalloc(sizeof(struct ev_io));
472 struct ev_check *xcb_check = scalloc(sizeof(struct ev_check));
473 struct ev_prepare *xcb_prepare = scalloc(sizeof(struct ev_prepare));
475 ev_io_init(xcb_watcher, xcb_got_event, xcb_get_file_descriptor(conn), EV_READ);
476 ev_io_start(loop, xcb_watcher);
480 ev_io_init(xkb, xkb_got_event, ConnectionNumber(xkbdpy), EV_READ);
481 ev_io_start(loop, xkb);
483 /* Flush the buffer so that libev can properly get new events */
487 ev_check_init(xcb_check, xcb_check_cb);
488 ev_check_start(loop, xcb_check);
490 ev_prepare_init(xcb_prepare, xcb_prepare_cb);
491 ev_prepare_start(loop, xcb_prepare);
495 manage_existing_windows(root);
497 setup_signal_handler();
499 /* Ignore SIGPIPE to survive errors when an IPC client disconnects
500 * while we are sending him a message */
501 signal(SIGPIPE, SIG_IGN);
503 /* Autostarting exec-lines */
505 struct Autostart *exec;
506 TAILQ_FOREACH(exec, &autostarts, autostarts) {
507 LOG("auto-starting %s\n", exec->command);
508 start_application(exec->command);