2 * vim:ts=4:sw=4:expandtab
9 static int xkb_event_base;
11 int xkb_current_group;
17 xcb_connection_t *conn;
22 struct ev_loop *main_loop;
24 xcb_key_symbols_t *keysyms;
26 /* Those are our connections to X11 for use with libXcursor and XKB */
27 Display *xlibdpy, *xkbdpy;
29 /* The list of key bindings */
30 struct bindings_head *bindings;
32 /* The list of exec-lines */
33 struct autostarts_head autostarts = TAILQ_HEAD_INITIALIZER(autostarts);
35 /* The list of exec_always lines */
36 struct autostarts_always_head autostarts_always = TAILQ_HEAD_INITIALIZER(autostarts_always);
38 /* The list of assignments */
39 struct assignments_head assignments = TAILQ_HEAD_INITIALIZER(assignments);
41 /* The list of workspace assignments (which workspace should end up on which
43 struct ws_assignments_head ws_assignments = TAILQ_HEAD_INITIALIZER(ws_assignments);
45 /* We hope that those are supported and set them to true */
46 bool xcursor_supported = true;
47 bool xkb_supported = true;
50 * This callback is only a dummy, see xcb_prepare_cb and xcb_check_cb.
51 * See also man libev(3): "ev_prepare" and "ev_check" - customise your event loop
54 static void xcb_got_event(EV_P_ struct ev_io *w, int revents) {
55 /* empty, because xcb_prepare_cb and xcb_check_cb are used */
59 * Flush before blocking (and waiting for new events)
62 static void xcb_prepare_cb(EV_P_ ev_prepare *w, int revents) {
67 * Instead of polling the X connection socket we leave this to
68 * xcb_poll_for_event() which knows better than we can ever know.
71 static void xcb_check_cb(EV_P_ ev_check *w, int revents) {
72 xcb_generic_event_t *event;
74 while ((event = xcb_poll_for_event(conn)) != NULL) {
75 if (event->response_type == 0) {
76 if (event_is_ignored(event->sequence, 0))
77 DLOG("Expected X11 Error received for sequence %x\n", event->sequence);
78 else ELOG("X11 Error received! sequence %x\n", event->sequence);
82 /* Strip off the highest bit (set if the event is generated) */
83 int type = (event->response_type & 0x7F);
85 handle_event(type, event);
93 * When using xmodmap to change the keyboard mapping, this event
94 * is only sent via XKB. Therefore, we need this special handler.
97 static void xkb_got_event(EV_P_ struct ev_io *w, int revents) {
98 DLOG("Handling XKB event\n");
101 /* When using xmodmap, every change (!) gets an own event.
102 * Therefore, we just read all events and only handle the
103 * mapping_notify once. */
104 bool mapping_changed = false;
105 while (XPending(xkbdpy)) {
106 XNextEvent(xkbdpy, (XEvent*)&ev);
107 /* While we should never receive a non-XKB event,
108 * better do sanity checking */
109 if (ev.type != xkb_event_base)
112 if (ev.any.xkb_type == XkbMapNotify) {
113 mapping_changed = true;
117 if (ev.any.xkb_type != XkbStateNotify) {
118 ELOG("Unknown XKB event received (type %d)\n", ev.any.xkb_type);
122 /* See The XKB Extension: Library Specification, section 14.1 */
123 /* We check if the current group (each group contains
124 * two levels) has been changed. Mode_switch activates
125 * group XkbGroup2Index */
126 if (xkb_current_group == ev.state.group)
129 xkb_current_group = ev.state.group;
131 if (ev.state.group == XkbGroup2Index) {
132 DLOG("Mode_switch enabled\n");
133 grab_all_keys(conn, true);
136 if (ev.state.group == XkbGroup1Index) {
137 DLOG("Mode_switch disabled\n");
138 ungrab_all_keys(conn);
139 grab_all_keys(conn, false);
143 if (!mapping_changed)
146 DLOG("Keyboard mapping changed, updating keybindings\n");
147 xcb_key_symbols_free(keysyms);
148 keysyms = xcb_key_symbols_alloc(conn);
150 xcb_get_numlock_mask(conn);
152 ungrab_all_keys(conn);
153 DLOG("Re-grabbing...\n");
155 grab_all_keys(conn, (xkb_current_group == XkbGroup2Index));
159 int main(int argc, char *argv[]) {
160 //parse_cmd("[ foo ] attach, attach ; focus");
162 char *override_configpath = NULL;
163 bool autostart = true;
164 char *layout_path = NULL;
165 bool delete_layout_path = false;
166 bool only_check_config = false;
167 bool force_xinerama = false;
168 bool disable_signalhandler = false;
169 static struct option long_options[] = {
170 {"no-autostart", no_argument, 0, 'a'},
171 {"config", required_argument, 0, 'c'},
172 {"version", no_argument, 0, 'v'},
173 {"help", no_argument, 0, 'h'},
174 {"layout", required_argument, 0, 'L'},
175 {"restart", required_argument, 0, 0},
176 {"force-xinerama", no_argument, 0, 0},
177 {"disable-signalhandler", no_argument, 0, 0},
180 int option_index = 0, opt;
182 setlocale(LC_ALL, "");
184 /* Disable output buffering to make redirects in .xsession actually useful for debugging */
185 if (!isatty(fileno(stdout)))
186 setbuf(stdout, NULL);
192 while ((opt = getopt_long(argc, argv, "c:CvaL:hld:V", long_options, &option_index)) != -1) {
195 LOG("Autostart disabled using -a\n");
200 layout_path = sstrdup(optarg);
201 delete_layout_path = false;
204 FREE(override_configpath);
205 override_configpath = sstrdup(optarg);
208 LOG("Checking configuration file only (-C)\n");
209 only_check_config = true;
212 printf("i3 version " I3_VERSION " © 2009-2011 Michael Stapelberg and contributors\n");
218 LOG("Enabling debug loglevel %s\n", optarg);
219 add_loglevel(optarg);
222 /* DEPRECATED, ignored for the next 3 versions (3.e, 3.f, 3.g) */
225 if (strcmp(long_options[option_index].name, "force-xinerama") == 0) {
226 force_xinerama = true;
227 ELOG("Using Xinerama instead of RandR. This option should be "
228 "avoided at all cost because it does not refresh the list "
229 "of screens, so you cannot configure displays at runtime. "
230 "Please check if your driver really does not support RandR "
231 "and disable this option as soon as you can.\n");
233 } else if (strcmp(long_options[option_index].name, "disable-signalhandler") == 0) {
234 disable_signalhandler = true;
236 } else if (strcmp(long_options[option_index].name, "restart") == 0) {
238 layout_path = sstrdup(optarg);
239 delete_layout_path = true;
244 fprintf(stderr, "Usage: %s [-c configfile] [-d loglevel] [-a] [-v] [-V] [-C]\n", argv[0]);
245 fprintf(stderr, "\n");
246 fprintf(stderr, "-a: disable autostart\n");
247 fprintf(stderr, "-L <layoutfile>: load the layout from <layoutfile>\n");
248 fprintf(stderr, "-v: display version and exit\n");
249 fprintf(stderr, "-V: enable verbose mode\n");
250 fprintf(stderr, "-d <loglevel>: enable debug loglevel <loglevel>\n");
251 fprintf(stderr, "-c <configfile>: use the provided configfile instead\n");
252 fprintf(stderr, "-C: check configuration file and exit\n");
253 fprintf(stderr, "--force-xinerama: Use Xinerama instead of RandR. This "
254 "option should only be used if you are stuck with the "
255 "nvidia closed source driver which does not support RandR.\n");
260 LOG("i3 (tree) version " I3_VERSION " starting\n");
262 conn = xcb_connect(NULL, &screens);
263 if (xcb_connection_has_error(conn))
264 errx(EXIT_FAILURE, "Cannot open display\n");
266 /* Initialize the libev event loop. This needs to be done before loading
267 * the config file because the parser will install an ev_child watcher
268 * for the nagbar when config errors are found. */
269 main_loop = EV_DEFAULT;
270 if (main_loop == NULL)
271 die("Could not initialize libev. Bad LIBEV_FLAGS?\n");
273 xcb_screen_t *root_screen = xcb_aux_get_screen(conn, screens);
274 root = root_screen->root;
275 root_depth = root_screen->root_depth;
276 xcb_get_geometry_cookie_t gcookie = xcb_get_geometry(conn, root);
278 load_configuration(conn, override_configpath, false);
279 if (only_check_config) {
280 LOG("Done checking configuration file. Exiting.\n");
284 if (config.ipc_socket_path == NULL) {
285 /* Fall back to a file name in /tmp/ based on the PID */
286 if ((config.ipc_socket_path = getenv("I3SOCK")) == NULL)
287 config.ipc_socket_path = get_process_filename("ipc-socket");
289 config.ipc_socket_path = sstrdup(config.ipc_socket_path);
292 uint32_t mask = XCB_CW_EVENT_MASK;
293 uint32_t values[] = { XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
294 XCB_EVENT_MASK_STRUCTURE_NOTIFY | /* when the user adds a screen (e.g. video
295 projector), the root window gets a
297 XCB_EVENT_MASK_POINTER_MOTION |
298 XCB_EVENT_MASK_PROPERTY_CHANGE |
299 XCB_EVENT_MASK_ENTER_WINDOW };
300 xcb_void_cookie_t cookie;
301 cookie = xcb_change_window_attributes_checked(conn, root, mask, values);
302 check_error(conn, cookie, "Another window manager seems to be running");
304 xcb_get_geometry_reply_t *greply = xcb_get_geometry_reply(conn, gcookie, NULL);
305 if (greply == NULL) {
306 ELOG("Could not get geometry of the root window, exiting\n");
309 DLOG("root geometry reply: (%d, %d) %d x %d\n", greply->x, greply->y, greply->width, greply->height);
311 /* Place requests for the atoms we need as soon as possible */
312 #define xmacro(atom) \
313 xcb_intern_atom_cookie_t atom ## _cookie = xcb_intern_atom(conn, 0, strlen(#atom), #atom);
314 #include "atoms.xmacro"
317 /* Initialize the Xlib connection */
318 xlibdpy = xkbdpy = XOpenDisplay(NULL);
320 /* Try to load the X cursors and initialize the XKB extension */
321 if (xlibdpy == NULL) {
322 ELOG("ERROR: XOpenDisplay() failed, disabling libXcursor/XKB support\n");
323 xcursor_supported = false;
324 xkb_supported = false;
325 } else if (fcntl(ConnectionNumber(xlibdpy), F_SETFD, FD_CLOEXEC) == -1) {
326 ELOG("Could not set FD_CLOEXEC on xkbdpy\n");
329 xcursor_load_cursors();
335 major = XkbMajorVersion,
336 minor = XkbMinorVersion;
338 if (fcntl(ConnectionNumber(xkbdpy), F_SETFD, FD_CLOEXEC) == -1) {
339 fprintf(stderr, "Could not set FD_CLOEXEC on xkbdpy\n");
344 if (!XkbQueryExtension(xkbdpy,&i1,&xkb_event_base,&errBase,&major,&minor)) {
345 fprintf(stderr, "XKB not supported by X-server\n");
348 /* end of ugliness */
350 if (!XkbSelectEvents(xkbdpy, XkbUseCoreKbd,
351 XkbMapNotifyMask | XkbStateNotifyMask,
352 XkbMapNotifyMask | XkbStateNotifyMask)) {
353 fprintf(stderr, "Could not set XKB event mask\n");
358 /* Setup NetWM atoms */
359 #define xmacro(name) \
361 xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(conn, name ## _cookie, NULL); \
363 ELOG("Could not get atom " #name "\n"); \
366 A_ ## name = reply->atom; \
369 #include "atoms.xmacro"
372 property_handlers_init();
374 /* Set up the atoms we support */
375 xcb_atom_t supported_atoms[] = {
376 #define xmacro(atom) A_ ## atom,
377 #include "atoms.xmacro"
380 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_SUPPORTED, A_ATOM, 32, 7, supported_atoms);
381 /* Set up the window manager’s name */
382 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_SUPPORTING_WM_CHECK, A_WINDOW, 32, 1, &root);
383 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_WM_NAME, A_UTF8_STRING, 8, strlen("i3"), "i3");
385 keysyms = xcb_key_symbols_alloc(conn);
387 xcb_get_numlock_mask(conn);
390 grab_all_keys(conn, false);
392 bool needs_tree_init = true;
394 LOG("Trying to restore the layout from %s...", layout_path);
395 needs_tree_init = !tree_restore(layout_path, greply);
396 if (delete_layout_path)
405 if (force_xinerama) {
408 DLOG("Checking for XRandR...\n");
409 randr_init(&randr_base);
414 /* Create the UNIX domain socket for IPC */
415 int ipc_socket = ipc_create_socket(config.ipc_socket_path);
416 if (ipc_socket == -1) {
417 ELOG("Could not create the IPC socket, IPC disabled\n");
419 free(config.ipc_socket_path);
420 struct ev_io *ipc_io = scalloc(sizeof(struct ev_io));
421 ev_io_init(ipc_io, ipc_new_client, ipc_socket, EV_READ);
422 ev_io_start(main_loop, ipc_io);
425 /* Set up i3 specific atoms like I3_SOCKET_PATH and I3_CONFIG_PATH */
428 struct ev_io *xcb_watcher = scalloc(sizeof(struct ev_io));
429 struct ev_io *xkb = scalloc(sizeof(struct ev_io));
430 struct ev_check *xcb_check = scalloc(sizeof(struct ev_check));
431 struct ev_prepare *xcb_prepare = scalloc(sizeof(struct ev_prepare));
433 ev_io_init(xcb_watcher, xcb_got_event, xcb_get_file_descriptor(conn), EV_READ);
434 ev_io_start(main_loop, xcb_watcher);
438 ev_io_init(xkb, xkb_got_event, ConnectionNumber(xkbdpy), EV_READ);
439 ev_io_start(main_loop, xkb);
441 /* Flush the buffer so that libev can properly get new events */
445 ev_check_init(xcb_check, xcb_check_cb);
446 ev_check_start(main_loop, xcb_check);
448 ev_prepare_init(xcb_prepare, xcb_prepare_cb);
449 ev_prepare_start(main_loop, xcb_prepare);
453 manage_existing_windows(root);
455 if (!disable_signalhandler)
456 setup_signal_handler();
458 /* Ignore SIGPIPE to survive errors when an IPC client disconnects
459 * while we are sending him a message */
460 signal(SIGPIPE, SIG_IGN);
462 /* Autostarting exec-lines */
464 struct Autostart *exec;
465 TAILQ_FOREACH(exec, &autostarts, autostarts) {
466 LOG("auto-starting %s\n", exec->command);
467 start_application(exec->command);
471 /* Autostarting exec_always-lines */
472 struct Autostart *exec_always;
473 TAILQ_FOREACH(exec_always, &autostarts_always, autostarts_always) {
474 LOG("auto-starting (always!) %s\n", exec_always->command);
475 start_application(exec_always->command);
478 ev_loop(main_loop, 0);