2 * vim:ts=4:sw=4:expandtab
10 static int xkb_event_base;
12 int xkb_current_group;
18 xcb_connection_t *conn;
20 xcb_screen_t *root_screen;
24 struct ev_loop *main_loop;
26 xcb_key_symbols_t *keysyms;
28 /* Those are our connections to X11 for use with libXcursor and XKB */
29 Display *xlibdpy, *xkbdpy;
31 /* The list of key bindings */
32 struct bindings_head *bindings;
34 /* The list of exec-lines */
35 struct autostarts_head autostarts = TAILQ_HEAD_INITIALIZER(autostarts);
37 /* The list of exec_always lines */
38 struct autostarts_always_head autostarts_always = TAILQ_HEAD_INITIALIZER(autostarts_always);
40 /* The list of assignments */
41 struct assignments_head assignments = TAILQ_HEAD_INITIALIZER(assignments);
43 /* The list of workspace assignments (which workspace should end up on which
45 struct ws_assignments_head ws_assignments = TAILQ_HEAD_INITIALIZER(ws_assignments);
47 /* We hope that those are supported and set them to true */
48 bool xcursor_supported = true;
49 bool xkb_supported = true;
52 * This callback is only a dummy, see xcb_prepare_cb and xcb_check_cb.
53 * See also man libev(3): "ev_prepare" and "ev_check" - customise your event loop
56 static void xcb_got_event(EV_P_ struct ev_io *w, int revents) {
57 /* empty, because xcb_prepare_cb and xcb_check_cb are used */
61 * Flush before blocking (and waiting for new events)
64 static void xcb_prepare_cb(EV_P_ ev_prepare *w, int revents) {
69 * Instead of polling the X connection socket we leave this to
70 * xcb_poll_for_event() which knows better than we can ever know.
73 static void xcb_check_cb(EV_P_ ev_check *w, int revents) {
74 xcb_generic_event_t *event;
76 while ((event = xcb_poll_for_event(conn)) != NULL) {
77 if (event->response_type == 0) {
78 if (event_is_ignored(event->sequence, 0))
79 DLOG("Expected X11 Error received for sequence %x\n", event->sequence);
81 xcb_generic_error_t *error = (xcb_generic_error_t*)event;
82 ELOG("X11 Error received! sequence 0x%x, error_code = %d\n",
83 error->sequence, error->error_code);
89 /* Strip off the highest bit (set if the event is generated) */
90 int type = (event->response_type & 0x7F);
92 handle_event(type, event);
100 * When using xmodmap to change the keyboard mapping, this event
101 * is only sent via XKB. Therefore, we need this special handler.
104 static void xkb_got_event(EV_P_ struct ev_io *w, int revents) {
105 DLOG("Handling XKB event\n");
108 /* When using xmodmap, every change (!) gets an own event.
109 * Therefore, we just read all events and only handle the
110 * mapping_notify once. */
111 bool mapping_changed = false;
112 while (XPending(xkbdpy)) {
113 XNextEvent(xkbdpy, (XEvent*)&ev);
114 /* While we should never receive a non-XKB event,
115 * better do sanity checking */
116 if (ev.type != xkb_event_base)
119 if (ev.any.xkb_type == XkbMapNotify) {
120 mapping_changed = true;
124 if (ev.any.xkb_type != XkbStateNotify) {
125 ELOG("Unknown XKB event received (type %d)\n", ev.any.xkb_type);
129 /* See The XKB Extension: Library Specification, section 14.1 */
130 /* We check if the current group (each group contains
131 * two levels) has been changed. Mode_switch activates
132 * group XkbGroup2Index */
133 if (xkb_current_group == ev.state.group)
136 xkb_current_group = ev.state.group;
138 if (ev.state.group == XkbGroup2Index) {
139 DLOG("Mode_switch enabled\n");
140 grab_all_keys(conn, true);
143 if (ev.state.group == XkbGroup1Index) {
144 DLOG("Mode_switch disabled\n");
145 ungrab_all_keys(conn);
146 grab_all_keys(conn, false);
150 if (!mapping_changed)
153 DLOG("Keyboard mapping changed, updating keybindings\n");
154 xcb_key_symbols_free(keysyms);
155 keysyms = xcb_key_symbols_alloc(conn);
157 xcb_get_numlock_mask(conn);
159 ungrab_all_keys(conn);
160 DLOG("Re-grabbing...\n");
162 grab_all_keys(conn, (xkb_current_group == XkbGroup2Index));
166 int main(int argc, char *argv[]) {
167 //parse_cmd("[ foo ] attach, attach ; focus");
169 char *override_configpath = NULL;
170 bool autostart = true;
171 char *layout_path = NULL;
172 bool delete_layout_path = false;
173 bool only_check_config = false;
174 bool force_xinerama = false;
175 bool disable_signalhandler = false;
176 static struct option long_options[] = {
177 {"no-autostart", no_argument, 0, 'a'},
178 {"config", required_argument, 0, 'c'},
179 {"version", no_argument, 0, 'v'},
180 {"help", no_argument, 0, 'h'},
181 {"layout", required_argument, 0, 'L'},
182 {"restart", required_argument, 0, 0},
183 {"force-xinerama", no_argument, 0, 0},
184 {"disable-signalhandler", no_argument, 0, 0},
187 int option_index = 0, opt;
189 setlocale(LC_ALL, "");
191 /* Disable output buffering to make redirects in .xsession actually useful for debugging */
192 if (!isatty(fileno(stdout)))
193 setbuf(stdout, NULL);
199 while ((opt = getopt_long(argc, argv, "c:CvaL:hld:V", long_options, &option_index)) != -1) {
202 LOG("Autostart disabled using -a\n");
207 layout_path = sstrdup(optarg);
208 delete_layout_path = false;
211 FREE(override_configpath);
212 override_configpath = sstrdup(optarg);
215 LOG("Checking configuration file only (-C)\n");
216 only_check_config = true;
219 printf("i3 version " I3_VERSION " © 2009-2011 Michael Stapelberg and contributors\n");
225 LOG("Enabling debug loglevel %s\n", optarg);
226 add_loglevel(optarg);
229 /* DEPRECATED, ignored for the next 3 versions (3.e, 3.f, 3.g) */
232 if (strcmp(long_options[option_index].name, "force-xinerama") == 0) {
233 force_xinerama = true;
234 ELOG("Using Xinerama instead of RandR. This option should be "
235 "avoided at all cost because it does not refresh the list "
236 "of screens, so you cannot configure displays at runtime. "
237 "Please check if your driver really does not support RandR "
238 "and disable this option as soon as you can.\n");
240 } else if (strcmp(long_options[option_index].name, "disable-signalhandler") == 0) {
241 disable_signalhandler = true;
243 } else if (strcmp(long_options[option_index].name, "restart") == 0) {
245 layout_path = sstrdup(optarg);
246 delete_layout_path = true;
251 fprintf(stderr, "Usage: %s [-c configfile] [-d loglevel] [-a] [-v] [-V] [-C]\n", argv[0]);
252 fprintf(stderr, "\n");
253 fprintf(stderr, "-a: disable autostart\n");
254 fprintf(stderr, "-L <layoutfile>: load the layout from <layoutfile>\n");
255 fprintf(stderr, "-v: display version and exit\n");
256 fprintf(stderr, "-V: enable verbose mode\n");
257 fprintf(stderr, "-d <loglevel>: enable debug loglevel <loglevel>\n");
258 fprintf(stderr, "-c <configfile>: use the provided configfile instead\n");
259 fprintf(stderr, "-C: check configuration file and exit\n");
260 fprintf(stderr, "--force-xinerama: Use Xinerama instead of RandR. This "
261 "option should only be used if you are stuck with the "
262 "nvidia closed source driver which does not support RandR.\n");
267 LOG("i3 (tree) version " I3_VERSION " starting\n");
269 conn = xcb_connect(NULL, &screens);
270 if (xcb_connection_has_error(conn))
271 errx(EXIT_FAILURE, "Cannot open display\n");
273 /* Initialize the libev event loop. This needs to be done before loading
274 * the config file because the parser will install an ev_child watcher
275 * for the nagbar when config errors are found. */
276 main_loop = EV_DEFAULT;
277 if (main_loop == NULL)
278 die("Could not initialize libev. Bad LIBEV_FLAGS?\n");
280 root_screen = xcb_aux_get_screen(conn, screens);
281 root = root_screen->root;
282 root_depth = root_screen->root_depth;
283 xcb_get_geometry_cookie_t gcookie = xcb_get_geometry(conn, root);
284 xcb_query_pointer_cookie_t pointercookie = xcb_query_pointer(conn, root);
286 load_configuration(conn, override_configpath, false);
287 if (only_check_config) {
288 LOG("Done checking configuration file. Exiting.\n");
292 if (config.ipc_socket_path == NULL) {
293 /* Fall back to a file name in /tmp/ based on the PID */
294 if ((config.ipc_socket_path = getenv("I3SOCK")) == NULL)
295 config.ipc_socket_path = get_process_filename("ipc-socket");
297 config.ipc_socket_path = sstrdup(config.ipc_socket_path);
300 uint32_t mask = XCB_CW_EVENT_MASK;
301 uint32_t values[] = { XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
302 XCB_EVENT_MASK_STRUCTURE_NOTIFY | /* when the user adds a screen (e.g. video
303 projector), the root window gets a
305 XCB_EVENT_MASK_POINTER_MOTION |
306 XCB_EVENT_MASK_PROPERTY_CHANGE |
307 XCB_EVENT_MASK_ENTER_WINDOW };
308 xcb_void_cookie_t cookie;
309 cookie = xcb_change_window_attributes_checked(conn, root, mask, values);
310 check_error(conn, cookie, "Another window manager seems to be running");
312 xcb_get_geometry_reply_t *greply = xcb_get_geometry_reply(conn, gcookie, NULL);
313 if (greply == NULL) {
314 ELOG("Could not get geometry of the root window, exiting\n");
317 DLOG("root geometry reply: (%d, %d) %d x %d\n", greply->x, greply->y, greply->width, greply->height);
319 /* Place requests for the atoms we need as soon as possible */
320 #define xmacro(atom) \
321 xcb_intern_atom_cookie_t atom ## _cookie = xcb_intern_atom(conn, 0, strlen(#atom), #atom);
322 #include "atoms.xmacro"
325 /* Initialize the Xlib connection */
326 xlibdpy = xkbdpy = XOpenDisplay(NULL);
328 /* Try to load the X cursors and initialize the XKB extension */
329 if (xlibdpy == NULL) {
330 ELOG("ERROR: XOpenDisplay() failed, disabling libXcursor/XKB support\n");
331 xcursor_supported = false;
332 xkb_supported = false;
333 } else if (fcntl(ConnectionNumber(xlibdpy), F_SETFD, FD_CLOEXEC) == -1) {
334 ELOG("Could not set FD_CLOEXEC on xkbdpy\n");
337 xcursor_load_cursors();
341 /* Set a cursor for the root window (otherwise the root window will show no
342 cursor until the first client is launched). */
343 if (xcursor_supported) {
344 xcursor_set_root_cursor();
346 xcb_cursor_t cursor_id = xcb_generate_id(conn);
347 i3Font cursor_font = load_font("cursor", false);
348 int xcb_cursor = xcursor_get_xcb_cursor(XCURSOR_CURSOR_POINTER);
349 xcb_create_glyph_cursor(conn, cursor_id, cursor_font.id, cursor_font.id,
350 xcb_cursor, xcb_cursor + 1, 0, 0, 0, 65535, 65535, 65535);
351 xcb_change_window_attributes(conn, root, XCB_CW_CURSOR, &cursor_id);
352 xcb_free_cursor(conn, cursor_id);
357 major = XkbMajorVersion,
358 minor = XkbMinorVersion;
360 if (fcntl(ConnectionNumber(xkbdpy), F_SETFD, FD_CLOEXEC) == -1) {
361 fprintf(stderr, "Could not set FD_CLOEXEC on xkbdpy\n");
366 if (!XkbQueryExtension(xkbdpy,&i1,&xkb_event_base,&errBase,&major,&minor)) {
367 fprintf(stderr, "XKB not supported by X-server\n");
370 /* end of ugliness */
372 if (!XkbSelectEvents(xkbdpy, XkbUseCoreKbd,
373 XkbMapNotifyMask | XkbStateNotifyMask,
374 XkbMapNotifyMask | XkbStateNotifyMask)) {
375 fprintf(stderr, "Could not set XKB event mask\n");
380 /* Setup NetWM atoms */
381 #define xmacro(name) \
383 xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(conn, name ## _cookie, NULL); \
385 ELOG("Could not get atom " #name "\n"); \
388 A_ ## name = reply->atom; \
391 #include "atoms.xmacro"
394 property_handlers_init();
396 /* Set up the atoms we support */
397 xcb_atom_t supported_atoms[] = {
398 #define xmacro(atom) A_ ## atom,
399 #include "atoms.xmacro"
402 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_SUPPORTED, XCB_ATOM_ATOM, 32, 16, supported_atoms);
403 /* Set up the window manager’s name */
404 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_SUPPORTING_WM_CHECK, XCB_ATOM_WINDOW, 32, 1, &root);
405 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_WM_NAME, A_UTF8_STRING, 8, strlen("i3"), "i3");
407 keysyms = xcb_key_symbols_alloc(conn);
409 xcb_get_numlock_mask(conn);
412 grab_all_keys(conn, false);
414 bool needs_tree_init = true;
416 LOG("Trying to restore the layout from %s...", layout_path);
417 needs_tree_init = !tree_restore(layout_path, greply);
418 if (delete_layout_path)
427 if (force_xinerama) {
430 DLOG("Checking for XRandR...\n");
431 randr_init(&randr_base);
434 xcb_query_pointer_reply_t *pointerreply;
435 Output *output = NULL;
436 if (!(pointerreply = xcb_query_pointer_reply(conn, pointercookie, NULL))) {
437 ELOG("Could not query pointer position, using first screen\n");
438 output = get_first_output();
440 DLOG("Pointer at %d, %d\n", pointerreply->root_x, pointerreply->root_y);
441 output = get_output_containing(pointerreply->root_x, pointerreply->root_y);
443 ELOG("ERROR: No screen at (%d, %d), starting on the first screen\n",
444 pointerreply->root_x, pointerreply->root_y);
445 output = get_first_output();
448 con_focus(con_descend_focused(output_get_content(output->con)));
453 /* Create the UNIX domain socket for IPC */
454 int ipc_socket = ipc_create_socket(config.ipc_socket_path);
455 if (ipc_socket == -1) {
456 ELOG("Could not create the IPC socket, IPC disabled\n");
458 free(config.ipc_socket_path);
459 struct ev_io *ipc_io = scalloc(sizeof(struct ev_io));
460 ev_io_init(ipc_io, ipc_new_client, ipc_socket, EV_READ);
461 ev_io_start(main_loop, ipc_io);
464 /* Also handle the UNIX domain sockets passed via socket activation */
465 int fds = sd_listen_fds(1);
467 ELOG("socket activation: Error in sd_listen_fds\n");
469 DLOG("socket activation: no sockets passed\n");
471 for (int fd = SD_LISTEN_FDS_START; fd < (SD_LISTEN_FDS_START + fds); fd++) {
472 DLOG("socket activation: also listening on fd %d\n", fd);
473 struct ev_io *ipc_io = scalloc(sizeof(struct ev_io));
474 ev_io_init(ipc_io, ipc_new_client, fd, EV_READ);
475 ev_io_start(main_loop, ipc_io);
479 /* Set up i3 specific atoms like I3_SOCKET_PATH and I3_CONFIG_PATH */
482 struct ev_io *xcb_watcher = scalloc(sizeof(struct ev_io));
483 struct ev_io *xkb = scalloc(sizeof(struct ev_io));
484 struct ev_check *xcb_check = scalloc(sizeof(struct ev_check));
485 struct ev_prepare *xcb_prepare = scalloc(sizeof(struct ev_prepare));
487 ev_io_init(xcb_watcher, xcb_got_event, xcb_get_file_descriptor(conn), EV_READ);
488 ev_io_start(main_loop, xcb_watcher);
492 ev_io_init(xkb, xkb_got_event, ConnectionNumber(xkbdpy), EV_READ);
493 ev_io_start(main_loop, xkb);
495 /* Flush the buffer so that libev can properly get new events */
499 ev_check_init(xcb_check, xcb_check_cb);
500 ev_check_start(main_loop, xcb_check);
502 ev_prepare_init(xcb_prepare, xcb_prepare_cb);
503 ev_prepare_start(main_loop, xcb_prepare);
507 manage_existing_windows(root);
509 if (!disable_signalhandler)
510 setup_signal_handler();
512 /* Ignore SIGPIPE to survive errors when an IPC client disconnects
513 * while we are sending him a message */
514 signal(SIGPIPE, SIG_IGN);
516 /* Autostarting exec-lines */
518 struct Autostart *exec;
519 TAILQ_FOREACH(exec, &autostarts, autostarts) {
520 LOG("auto-starting %s\n", exec->command);
521 start_application(exec->command);
525 /* Autostarting exec_always-lines */
526 struct Autostart *exec_always;
527 TAILQ_FOREACH(exec_always, &autostarts_always, autostarts_always) {
528 LOG("auto-starting (always!) %s\n", exec_always->command);
529 start_application(exec_always->command);
532 ev_loop(main_loop, 0);