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 assignments */
36 struct assignments_head assignments = TAILQ_HEAD_INITIALIZER(assignments);
38 /* The list of workspace assignments (which workspace should end up on which
40 struct ws_assignments_head ws_assignments = TAILQ_HEAD_INITIALIZER(ws_assignments);
42 /* We hope that those are supported and set them to true */
43 bool xcursor_supported = true;
44 bool xkb_supported = true;
47 * This callback is only a dummy, see xcb_prepare_cb and xcb_check_cb.
48 * See also man libev(3): "ev_prepare" and "ev_check" - customise your event loop
51 static void xcb_got_event(EV_P_ struct ev_io *w, int revents) {
52 /* empty, because xcb_prepare_cb and xcb_check_cb are used */
56 * Flush before blocking (and waiting for new events)
59 static void xcb_prepare_cb(EV_P_ ev_prepare *w, int revents) {
64 * Instead of polling the X connection socket we leave this to
65 * xcb_poll_for_event() which knows better than we can ever know.
68 static void xcb_check_cb(EV_P_ ev_check *w, int revents) {
69 xcb_generic_event_t *event;
71 while ((event = xcb_poll_for_event(conn)) != NULL) {
72 if (event->response_type == 0) {
73 if (event_is_ignored(event->sequence, 0))
74 DLOG("Expected X11 Error received for sequence %x\n", event->sequence);
75 else ELOG("X11 Error received! sequence %x\n", event->sequence);
79 /* Strip off the highest bit (set if the event is generated) */
80 int type = (event->response_type & 0x7F);
82 handle_event(type, event);
90 * When using xmodmap to change the keyboard mapping, this event
91 * is only sent via XKB. Therefore, we need this special handler.
94 static void xkb_got_event(EV_P_ struct ev_io *w, int revents) {
95 DLOG("Handling XKB event\n");
98 /* When using xmodmap, every change (!) gets an own event.
99 * Therefore, we just read all events and only handle the
100 * mapping_notify once. */
101 bool mapping_changed = false;
102 while (XPending(xkbdpy)) {
103 XNextEvent(xkbdpy, (XEvent*)&ev);
104 /* While we should never receive a non-XKB event,
105 * better do sanity checking */
106 if (ev.type != xkb_event_base)
109 if (ev.any.xkb_type == XkbMapNotify) {
110 mapping_changed = true;
114 if (ev.any.xkb_type != XkbStateNotify) {
115 ELOG("Unknown XKB event received (type %d)\n", ev.any.xkb_type);
119 /* See The XKB Extension: Library Specification, section 14.1 */
120 /* We check if the current group (each group contains
121 * two levels) has been changed. Mode_switch activates
122 * group XkbGroup2Index */
123 if (xkb_current_group == ev.state.group)
126 xkb_current_group = ev.state.group;
128 if (ev.state.group == XkbGroup2Index) {
129 DLOG("Mode_switch enabled\n");
130 grab_all_keys(conn, true);
133 if (ev.state.group == XkbGroup1Index) {
134 DLOG("Mode_switch disabled\n");
135 ungrab_all_keys(conn);
136 grab_all_keys(conn, false);
140 if (!mapping_changed)
143 DLOG("Keyboard mapping changed, updating keybindings\n");
144 xcb_key_symbols_free(keysyms);
145 keysyms = xcb_key_symbols_alloc(conn);
147 xcb_get_numlock_mask(conn);
149 ungrab_all_keys(conn);
150 DLOG("Re-grabbing...\n");
152 grab_all_keys(conn, (xkb_current_group == XkbGroup2Index));
156 int main(int argc, char *argv[]) {
157 //parse_cmd("[ foo ] attach, attach ; focus");
159 char *override_configpath = NULL;
160 bool autostart = true;
161 char *layout_path = NULL;
162 bool delete_layout_path = false;
163 bool only_check_config = false;
164 bool force_xinerama = false;
165 bool disable_signalhandler = false;
166 static struct option long_options[] = {
167 {"no-autostart", no_argument, 0, 'a'},
168 {"config", required_argument, 0, 'c'},
169 {"version", no_argument, 0, 'v'},
170 {"help", no_argument, 0, 'h'},
171 {"layout", required_argument, 0, 'L'},
172 {"restart", required_argument, 0, 0},
173 {"force-xinerama", no_argument, 0, 0},
174 {"disable-signalhandler", no_argument, 0, 0},
177 int option_index = 0, opt;
179 setlocale(LC_ALL, "");
181 /* Disable output buffering to make redirects in .xsession actually useful for debugging */
182 if (!isatty(fileno(stdout)))
183 setbuf(stdout, NULL);
189 while ((opt = getopt_long(argc, argv, "c:CvaL:hld:V", long_options, &option_index)) != -1) {
192 LOG("Autostart disabled using -a\n");
197 layout_path = sstrdup(optarg);
198 delete_layout_path = false;
201 FREE(override_configpath);
202 override_configpath = sstrdup(optarg);
205 LOG("Checking configuration file only (-C)\n");
206 only_check_config = true;
209 printf("i3 version " I3_VERSION " © 2009-2011 Michael Stapelberg and contributors\n");
215 LOG("Enabling debug loglevel %s\n", optarg);
216 add_loglevel(optarg);
219 /* DEPRECATED, ignored for the next 3 versions (3.e, 3.f, 3.g) */
222 if (strcmp(long_options[option_index].name, "force-xinerama") == 0) {
223 force_xinerama = true;
224 ELOG("Using Xinerama instead of RandR. This option should be "
225 "avoided at all cost because it does not refresh the list "
226 "of screens, so you cannot configure displays at runtime. "
227 "Please check if your driver really does not support RandR "
228 "and disable this option as soon as you can.\n");
230 } else if (strcmp(long_options[option_index].name, "disable-signalhandler") == 0) {
231 disable_signalhandler = true;
233 } else if (strcmp(long_options[option_index].name, "restart") == 0) {
235 layout_path = sstrdup(optarg);
236 delete_layout_path = true;
241 fprintf(stderr, "Usage: %s [-c configfile] [-d loglevel] [-a] [-v] [-V] [-C]\n", argv[0]);
242 fprintf(stderr, "\n");
243 fprintf(stderr, "-a: disable autostart\n");
244 fprintf(stderr, "-L <layoutfile>: load the layout from <layoutfile>\n");
245 fprintf(stderr, "-v: display version and exit\n");
246 fprintf(stderr, "-V: enable verbose mode\n");
247 fprintf(stderr, "-d <loglevel>: enable debug loglevel <loglevel>\n");
248 fprintf(stderr, "-c <configfile>: use the provided configfile instead\n");
249 fprintf(stderr, "-C: check configuration file and exit\n");
250 fprintf(stderr, "--force-xinerama: Use Xinerama instead of RandR. This "
251 "option should only be used if you are stuck with the "
252 "nvidia closed source driver which does not support RandR.\n");
257 LOG("i3 (tree) version " I3_VERSION " starting\n");
259 conn = xcb_connect(NULL, &screens);
260 if (xcb_connection_has_error(conn))
261 errx(EXIT_FAILURE, "Cannot open display\n");
263 /* Initialize the libev event loop. This needs to be done before loading
264 * the config file because the parser will install an ev_child watcher
265 * for the nagbar when config errors are found. */
266 main_loop = EV_DEFAULT;
267 if (main_loop == NULL)
268 die("Could not initialize libev. Bad LIBEV_FLAGS?\n");
270 xcb_screen_t *root_screen = xcb_aux_get_screen(conn, screens);
271 root = root_screen->root;
272 root_depth = root_screen->root_depth;
273 xcb_get_geometry_cookie_t gcookie = xcb_get_geometry(conn, root);
275 load_configuration(conn, override_configpath, false);
276 if (only_check_config) {
277 LOG("Done checking configuration file. Exiting.\n");
281 if (config.ipc_socket_path == NULL) {
282 /* Fall back to a file name in /tmp/ based on the PID */
283 if ((config.ipc_socket_path = getenv("I3SOCK")) == NULL)
284 config.ipc_socket_path = get_process_filename("ipc-socket");
286 config.ipc_socket_path = sstrdup(config.ipc_socket_path);
289 uint32_t mask = XCB_CW_EVENT_MASK;
290 uint32_t values[] = { XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
291 XCB_EVENT_MASK_STRUCTURE_NOTIFY | /* when the user adds a screen (e.g. video
292 projector), the root window gets a
294 XCB_EVENT_MASK_POINTER_MOTION |
295 XCB_EVENT_MASK_PROPERTY_CHANGE |
296 XCB_EVENT_MASK_ENTER_WINDOW };
297 xcb_void_cookie_t cookie;
298 cookie = xcb_change_window_attributes_checked(conn, root, mask, values);
299 check_error(conn, cookie, "Another window manager seems to be running");
301 xcb_get_geometry_reply_t *greply = xcb_get_geometry_reply(conn, gcookie, NULL);
302 if (greply == NULL) {
303 ELOG("Could not get geometry of the root window, exiting\n");
306 DLOG("root geometry reply: (%d, %d) %d x %d\n", greply->x, greply->y, greply->width, greply->height);
308 /* Place requests for the atoms we need as soon as possible */
309 #define xmacro(atom) \
310 xcb_intern_atom_cookie_t atom ## _cookie = xcb_intern_atom(conn, 0, strlen(#atom), #atom);
311 #include "atoms.xmacro"
314 /* Initialize the Xlib connection */
315 xlibdpy = xkbdpy = XOpenDisplay(NULL);
317 /* Try to load the X cursors and initialize the XKB extension */
318 if (xlibdpy == NULL) {
319 ELOG("ERROR: XOpenDisplay() failed, disabling libXcursor/XKB support\n");
320 xcursor_supported = false;
321 xkb_supported = false;
322 } else if (fcntl(ConnectionNumber(xlibdpy), F_SETFD, FD_CLOEXEC) == -1) {
323 ELOG("Could not set FD_CLOEXEC on xkbdpy\n");
326 xcursor_load_cursors();
332 major = XkbMajorVersion,
333 minor = XkbMinorVersion;
335 if (fcntl(ConnectionNumber(xkbdpy), F_SETFD, FD_CLOEXEC) == -1) {
336 fprintf(stderr, "Could not set FD_CLOEXEC on xkbdpy\n");
341 if (!XkbQueryExtension(xkbdpy,&i1,&xkb_event_base,&errBase,&major,&minor)) {
342 fprintf(stderr, "XKB not supported by X-server\n");
345 /* end of ugliness */
347 if (!XkbSelectEvents(xkbdpy, XkbUseCoreKbd,
348 XkbMapNotifyMask | XkbStateNotifyMask,
349 XkbMapNotifyMask | XkbStateNotifyMask)) {
350 fprintf(stderr, "Could not set XKB event mask\n");
355 /* Setup NetWM atoms */
356 #define xmacro(name) \
358 xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(conn, name ## _cookie, NULL); \
360 ELOG("Could not get atom " #name "\n"); \
363 A_ ## name = reply->atom; \
366 #include "atoms.xmacro"
369 property_handlers_init();
371 /* Set up the atoms we support */
372 xcb_atom_t supported_atoms[] = {
373 #define xmacro(atom) A_ ## atom,
374 #include "atoms.xmacro"
377 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_SUPPORTED, A_ATOM, 32, 7, supported_atoms);
378 /* Set up the window manager’s name */
379 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_SUPPORTING_WM_CHECK, A_WINDOW, 32, 1, &root);
380 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_WM_NAME, A_UTF8_STRING, 8, strlen("i3"), "i3");
382 keysyms = xcb_key_symbols_alloc(conn);
384 xcb_get_numlock_mask(conn);
387 grab_all_keys(conn, false);
389 bool needs_tree_init = true;
391 LOG("Trying to restore the layout from %s...", layout_path);
392 needs_tree_init = !tree_restore(layout_path, greply);
393 if (delete_layout_path)
402 if (force_xinerama) {
405 DLOG("Checking for XRandR...\n");
406 randr_init(&randr_base);
411 /* Create the UNIX domain socket for IPC */
412 int ipc_socket = ipc_create_socket(config.ipc_socket_path);
413 if (ipc_socket == -1) {
414 ELOG("Could not create the IPC socket, IPC disabled\n");
416 free(config.ipc_socket_path);
417 struct ev_io *ipc_io = scalloc(sizeof(struct ev_io));
418 ev_io_init(ipc_io, ipc_new_client, ipc_socket, EV_READ);
419 ev_io_start(main_loop, ipc_io);
422 /* Set up i3 specific atoms like I3_SOCKET_PATH and I3_CONFIG_PATH */
425 struct ev_io *xcb_watcher = scalloc(sizeof(struct ev_io));
426 struct ev_io *xkb = scalloc(sizeof(struct ev_io));
427 struct ev_check *xcb_check = scalloc(sizeof(struct ev_check));
428 struct ev_prepare *xcb_prepare = scalloc(sizeof(struct ev_prepare));
430 ev_io_init(xcb_watcher, xcb_got_event, xcb_get_file_descriptor(conn), EV_READ);
431 ev_io_start(main_loop, xcb_watcher);
435 ev_io_init(xkb, xkb_got_event, ConnectionNumber(xkbdpy), EV_READ);
436 ev_io_start(main_loop, xkb);
438 /* Flush the buffer so that libev can properly get new events */
442 ev_check_init(xcb_check, xcb_check_cb);
443 ev_check_start(main_loop, xcb_check);
445 ev_prepare_init(xcb_prepare, xcb_prepare_cb);
446 ev_prepare_start(main_loop, xcb_prepare);
450 manage_existing_windows(root);
452 if (!disable_signalhandler)
453 setup_signal_handler();
455 /* Ignore SIGPIPE to survive errors when an IPC client disconnects
456 * while we are sending him a message */
457 signal(SIGPIPE, SIG_IGN);
459 /* Autostarting exec-lines */
461 struct Autostart *exec;
462 TAILQ_FOREACH(exec, &autostarts, autostarts) {
463 LOG("auto-starting %s\n", exec->command);
464 start_application(exec->command);
468 ev_loop(main_loop, 0);