2 * vim:ts=4:sw=4:expandtab
9 static int xkb_event_base;
11 int xkb_current_group;
17 xcb_connection_t *conn;
22 xcb_key_symbols_t *keysyms;
24 /* Those are our connections to X11 for use with libXcursor and XKB */
25 Display *xlibdpy, *xkbdpy;
27 /* The list of key bindings */
28 struct bindings_head *bindings;
30 /* The list of exec-lines */
31 struct autostarts_head autostarts = TAILQ_HEAD_INITIALIZER(autostarts);
33 /* The list of assignments */
34 struct assignments_head assignments = TAILQ_HEAD_INITIALIZER(assignments);
36 /* We hope that those are supported and set them to true */
37 bool xcursor_supported = true;
38 bool xkb_supported = true;
41 * This callback is only a dummy, see xcb_prepare_cb and xcb_check_cb.
42 * See also man libev(3): "ev_prepare" and "ev_check" - customise your event loop
45 static void xcb_got_event(EV_P_ struct ev_io *w, int revents) {
46 /* empty, because xcb_prepare_cb and xcb_check_cb are used */
50 * Flush before blocking (and waiting for new events)
53 static void xcb_prepare_cb(EV_P_ ev_prepare *w, int revents) {
58 * Instead of polling the X connection socket we leave this to
59 * xcb_poll_for_event() which knows better than we can ever know.
62 static void xcb_check_cb(EV_P_ ev_check *w, int revents) {
63 xcb_generic_event_t *event;
65 while ((event = xcb_poll_for_event(conn)) != NULL) {
66 if (event->response_type == 0) {
67 ELOG("X11 Error received! sequence %x\n", event->sequence);
71 /* Strip off the highest bit (set if the event is generated) */
72 int type = (event->response_type & 0x7F);
74 handle_event(type, event);
82 * When using xmodmap to change the keyboard mapping, this event
83 * is only sent via XKB. Therefore, we need this special handler.
86 static void xkb_got_event(EV_P_ struct ev_io *w, int revents) {
87 DLOG("Handling XKB event\n");
90 /* When using xmodmap, every change (!) gets an own event.
91 * Therefore, we just read all events and only handle the
92 * mapping_notify once. */
93 bool mapping_changed = false;
94 while (XPending(xkbdpy)) {
95 XNextEvent(xkbdpy, (XEvent*)&ev);
96 /* While we should never receive a non-XKB event,
97 * better do sanity checking */
98 if (ev.type != xkb_event_base)
101 if (ev.any.xkb_type == XkbMapNotify) {
102 mapping_changed = true;
106 if (ev.any.xkb_type != XkbStateNotify) {
107 ELOG("Unknown XKB event received (type %d)\n", ev.any.xkb_type);
111 /* See The XKB Extension: Library Specification, section 14.1 */
112 /* We check if the current group (each group contains
113 * two levels) has been changed. Mode_switch activates
114 * group XkbGroup2Index */
115 if (xkb_current_group == ev.state.group)
118 xkb_current_group = ev.state.group;
120 if (ev.state.group == XkbGroup2Index) {
121 DLOG("Mode_switch enabled\n");
122 grab_all_keys(conn, true);
125 if (ev.state.group == XkbGroup1Index) {
126 DLOG("Mode_switch disabled\n");
127 ungrab_all_keys(conn);
128 grab_all_keys(conn, false);
132 if (!mapping_changed)
135 DLOG("Keyboard mapping changed, updating keybindings\n");
136 xcb_key_symbols_free(keysyms);
137 keysyms = xcb_key_symbols_alloc(conn);
139 xcb_get_numlock_mask(conn);
141 ungrab_all_keys(conn);
142 DLOG("Re-grabbing...\n");
144 grab_all_keys(conn, (xkb_current_group == XkbGroup2Index));
148 int main(int argc, char *argv[]) {
149 //parse_cmd("[ foo ] attach, attach ; focus");
151 char *override_configpath = NULL;
152 bool autostart = true;
153 char *layout_path = NULL;
154 bool delete_layout_path = false;
155 bool only_check_config = false;
156 bool force_xinerama = false;
157 bool disable_signalhandler = false;
158 static struct option long_options[] = {
159 {"no-autostart", no_argument, 0, 'a'},
160 {"config", required_argument, 0, 'c'},
161 {"version", no_argument, 0, 'v'},
162 {"help", no_argument, 0, 'h'},
163 {"layout", required_argument, 0, 'L'},
164 {"restart", required_argument, 0, 0},
165 {"force-xinerama", no_argument, 0, 0},
166 {"disable-signalhandler", no_argument, 0, 0},
169 int option_index = 0, opt;
171 setlocale(LC_ALL, "");
173 /* Disable output buffering to make redirects in .xsession actually useful for debugging */
174 if (!isatty(fileno(stdout)))
175 setbuf(stdout, NULL);
179 while ((opt = getopt_long(argc, argv, "c:CvaL:hld:V", long_options, &option_index)) != -1) {
182 LOG("Autostart disabled using -a\n");
187 layout_path = sstrdup(optarg);
188 delete_layout_path = false;
191 FREE(override_configpath);
192 override_configpath = sstrdup(optarg);
195 LOG("Checking configuration file only (-C)\n");
196 only_check_config = true;
199 printf("i3 version " I3_VERSION " © 2009-2011 Michael Stapelberg and contributors\n");
205 LOG("Enabling debug loglevel %s\n", optarg);
206 add_loglevel(optarg);
209 /* DEPRECATED, ignored for the next 3 versions (3.e, 3.f, 3.g) */
212 if (strcmp(long_options[option_index].name, "force-xinerama") == 0) {
213 force_xinerama = true;
214 ELOG("Using Xinerama instead of RandR. This option should be "
215 "avoided at all cost because it does not refresh the list "
216 "of screens, so you cannot configure displays at runtime. "
217 "Please check if your driver really does not support RandR "
218 "and disable this option as soon as you can.\n");
220 } else if (strcmp(long_options[option_index].name, "disable-signalhandler") == 0) {
221 disable_signalhandler = true;
223 } else if (strcmp(long_options[option_index].name, "restart") == 0) {
225 layout_path = sstrdup(optarg);
226 delete_layout_path = true;
231 fprintf(stderr, "Usage: %s [-c configfile] [-d loglevel] [-a] [-v] [-V] [-C]\n", argv[0]);
232 fprintf(stderr, "\n");
233 fprintf(stderr, "-a: disable autostart\n");
234 fprintf(stderr, "-L <layoutfile>: load the layout from <layoutfile>\n");
235 fprintf(stderr, "-v: display version and exit\n");
236 fprintf(stderr, "-V: enable verbose mode\n");
237 fprintf(stderr, "-d <loglevel>: enable debug loglevel <loglevel>\n");
238 fprintf(stderr, "-c <configfile>: use the provided configfile instead\n");
239 fprintf(stderr, "-C: check configuration file and exit\n");
240 fprintf(stderr, "--force-xinerama: Use Xinerama instead of RandR. This "
241 "option should only be used if you are stuck with the "
242 "nvidia closed source driver which does not support RandR.\n");
247 LOG("i3 (tree) version " I3_VERSION " starting\n");
249 conn = xcb_connect(NULL, &screens);
250 if (xcb_connection_has_error(conn))
251 errx(EXIT_FAILURE, "Cannot open display\n");
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 load_configuration(conn, override_configpath, false);
258 if (only_check_config) {
259 LOG("Done checking configuration file. Exiting.\n");
263 if (config.ipc_socket_path == NULL) {
264 /* Fall back to a file name in /tmp/ based on the PID */
265 if ((config.ipc_socket_path = getenv("I3SOCK")) == NULL)
266 config.ipc_socket_path = get_process_filename("ipc-socket");
268 config.ipc_socket_path = sstrdup(config.ipc_socket_path);
271 uint32_t mask = XCB_CW_EVENT_MASK;
272 uint32_t values[] = { XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
273 XCB_EVENT_MASK_STRUCTURE_NOTIFY | /* when the user adds a screen (e.g. video
274 projector), the root window gets a
276 XCB_EVENT_MASK_POINTER_MOTION |
277 XCB_EVENT_MASK_PROPERTY_CHANGE |
278 XCB_EVENT_MASK_ENTER_WINDOW };
279 xcb_void_cookie_t cookie;
280 cookie = xcb_change_window_attributes_checked(conn, root, mask, values);
281 check_error(conn, cookie, "Another window manager seems to be running");
283 /* Place requests for the atoms we need as soon as possible */
284 #define xmacro(atom) \
285 xcb_intern_atom_cookie_t atom ## _cookie = xcb_intern_atom(conn, 0, strlen(#atom), #atom);
286 #include "atoms.xmacro"
289 /* Initialize the Xlib connection */
290 xlibdpy = xkbdpy = XOpenDisplay(NULL);
292 /* Try to load the X cursors and initialize the XKB extension */
293 if (xlibdpy == NULL) {
294 ELOG("ERROR: XOpenDisplay() failed, disabling libXcursor/XKB support\n");
295 xcursor_supported = false;
296 xkb_supported = false;
297 } else if (fcntl(ConnectionNumber(xlibdpy), F_SETFD, FD_CLOEXEC) == -1) {
298 ELOG("Could not set FD_CLOEXEC on xkbdpy\n");
301 xcursor_load_cursors();
307 major = XkbMajorVersion,
308 minor = XkbMinorVersion;
310 if (fcntl(ConnectionNumber(xkbdpy), F_SETFD, FD_CLOEXEC) == -1) {
311 fprintf(stderr, "Could not set FD_CLOEXEC on xkbdpy\n");
316 if (!XkbQueryExtension(xkbdpy,&i1,&xkb_event_base,&errBase,&major,&minor)) {
317 fprintf(stderr, "XKB not supported by X-server\n");
320 /* end of ugliness */
322 if (!XkbSelectEvents(xkbdpy, XkbUseCoreKbd,
323 XkbMapNotifyMask | XkbStateNotifyMask,
324 XkbMapNotifyMask | XkbStateNotifyMask)) {
325 fprintf(stderr, "Could not set XKB event mask\n");
330 /* Setup NetWM atoms */
331 #define xmacro(name) \
333 xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(conn, name ## _cookie, NULL); \
335 ELOG("Could not get atom " #name "\n"); \
338 A_ ## name = reply->atom; \
341 #include "atoms.xmacro"
344 property_handlers_init();
346 /* Set up the atoms we support */
347 xcb_atom_t supported_atoms[] = {
348 #define xmacro(atom) A_ ## atom,
349 #include "atoms.xmacro"
352 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_SUPPORTED, A_ATOM, 32, 7, supported_atoms);
353 /* Set up the window manager’s name */
354 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_SUPPORTING_WM_CHECK, A_WINDOW, 32, 1, &root);
355 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_WM_NAME, A_UTF8_STRING, 8, strlen("i3"), "i3");
357 keysyms = xcb_key_symbols_alloc(conn);
359 xcb_get_numlock_mask(conn);
362 grab_all_keys(conn, false);
364 bool needs_tree_init = true;
366 LOG("Trying to restore the layout from %s...", layout_path);
367 needs_tree_init = !tree_restore(layout_path);
368 if (delete_layout_path)
375 if (force_xinerama) {
378 DLOG("Checking for XRandR...\n");
379 randr_init(&randr_base);
384 struct ev_loop *loop = ev_loop_new(0);
386 die("Could not initialize libev. Bad LIBEV_FLAGS?\n");
388 /* Create the UNIX domain socket for IPC */
389 int ipc_socket = ipc_create_socket(config.ipc_socket_path);
390 if (ipc_socket == -1) {
391 ELOG("Could not create the IPC socket, IPC disabled\n");
393 free(config.ipc_socket_path);
394 struct ev_io *ipc_io = scalloc(sizeof(struct ev_io));
395 ev_io_init(ipc_io, ipc_new_client, ipc_socket, EV_READ);
396 ev_io_start(loop, ipc_io);
399 /* Set up i3 specific atoms like I3_SOCKET_PATH and I3_CONFIG_PATH */
402 struct ev_io *xcb_watcher = scalloc(sizeof(struct ev_io));
403 struct ev_io *xkb = scalloc(sizeof(struct ev_io));
404 struct ev_check *xcb_check = scalloc(sizeof(struct ev_check));
405 struct ev_prepare *xcb_prepare = scalloc(sizeof(struct ev_prepare));
407 ev_io_init(xcb_watcher, xcb_got_event, xcb_get_file_descriptor(conn), EV_READ);
408 ev_io_start(loop, xcb_watcher);
412 ev_io_init(xkb, xkb_got_event, ConnectionNumber(xkbdpy), EV_READ);
413 ev_io_start(loop, xkb);
415 /* Flush the buffer so that libev can properly get new events */
419 ev_check_init(xcb_check, xcb_check_cb);
420 ev_check_start(loop, xcb_check);
422 ev_prepare_init(xcb_prepare, xcb_prepare_cb);
423 ev_prepare_start(loop, xcb_prepare);
427 manage_existing_windows(root);
429 if (!disable_signalhandler)
430 setup_signal_handler();
432 /* Ignore SIGPIPE to survive errors when an IPC client disconnects
433 * while we are sending him a message */
434 signal(SIGPIPE, SIG_IGN);
436 /* Autostarting exec-lines */
438 struct Autostart *exec;
439 TAILQ_FOREACH(exec, &autostarts, autostarts) {
440 LOG("auto-starting %s\n", exec->command);
441 start_application(exec->command);