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 /* The list of workspace assignments (which workspace should end up on which
38 struct ws_assignments_head ws_assignments = TAILQ_HEAD_INITIALIZER(ws_assignments);
40 /* We hope that those are supported and set them to true */
41 bool xcursor_supported = true;
42 bool xkb_supported = true;
45 * This callback is only a dummy, see xcb_prepare_cb and xcb_check_cb.
46 * See also man libev(3): "ev_prepare" and "ev_check" - customise your event loop
49 static void xcb_got_event(EV_P_ struct ev_io *w, int revents) {
50 /* empty, because xcb_prepare_cb and xcb_check_cb are used */
54 * Flush before blocking (and waiting for new events)
57 static void xcb_prepare_cb(EV_P_ ev_prepare *w, int revents) {
62 * Instead of polling the X connection socket we leave this to
63 * xcb_poll_for_event() which knows better than we can ever know.
66 static void xcb_check_cb(EV_P_ ev_check *w, int revents) {
67 xcb_generic_event_t *event;
69 while ((event = xcb_poll_for_event(conn)) != NULL) {
70 if (event->response_type == 0) {
71 ELOG("X11 Error received! sequence %x\n", event->sequence);
75 /* Strip off the highest bit (set if the event is generated) */
76 int type = (event->response_type & 0x7F);
78 handle_event(type, event);
86 * When using xmodmap to change the keyboard mapping, this event
87 * is only sent via XKB. Therefore, we need this special handler.
90 static void xkb_got_event(EV_P_ struct ev_io *w, int revents) {
91 DLOG("Handling XKB event\n");
94 /* When using xmodmap, every change (!) gets an own event.
95 * Therefore, we just read all events and only handle the
96 * mapping_notify once. */
97 bool mapping_changed = false;
98 while (XPending(xkbdpy)) {
99 XNextEvent(xkbdpy, (XEvent*)&ev);
100 /* While we should never receive a non-XKB event,
101 * better do sanity checking */
102 if (ev.type != xkb_event_base)
105 if (ev.any.xkb_type == XkbMapNotify) {
106 mapping_changed = true;
110 if (ev.any.xkb_type != XkbStateNotify) {
111 ELOG("Unknown XKB event received (type %d)\n", ev.any.xkb_type);
115 /* See The XKB Extension: Library Specification, section 14.1 */
116 /* We check if the current group (each group contains
117 * two levels) has been changed. Mode_switch activates
118 * group XkbGroup2Index */
119 if (xkb_current_group == ev.state.group)
122 xkb_current_group = ev.state.group;
124 if (ev.state.group == XkbGroup2Index) {
125 DLOG("Mode_switch enabled\n");
126 grab_all_keys(conn, true);
129 if (ev.state.group == XkbGroup1Index) {
130 DLOG("Mode_switch disabled\n");
131 ungrab_all_keys(conn);
132 grab_all_keys(conn, false);
136 if (!mapping_changed)
139 DLOG("Keyboard mapping changed, updating keybindings\n");
140 xcb_key_symbols_free(keysyms);
141 keysyms = xcb_key_symbols_alloc(conn);
143 xcb_get_numlock_mask(conn);
145 ungrab_all_keys(conn);
146 DLOG("Re-grabbing...\n");
148 grab_all_keys(conn, (xkb_current_group == XkbGroup2Index));
152 int main(int argc, char *argv[]) {
153 //parse_cmd("[ foo ] attach, attach ; focus");
155 char *override_configpath = NULL;
156 bool autostart = true;
157 char *layout_path = NULL;
158 bool delete_layout_path = false;
159 bool only_check_config = false;
160 bool force_xinerama = false;
161 bool disable_signalhandler = false;
162 static struct option long_options[] = {
163 {"no-autostart", no_argument, 0, 'a'},
164 {"config", required_argument, 0, 'c'},
165 {"version", no_argument, 0, 'v'},
166 {"help", no_argument, 0, 'h'},
167 {"layout", required_argument, 0, 'L'},
168 {"restart", required_argument, 0, 0},
169 {"force-xinerama", no_argument, 0, 0},
170 {"disable-signalhandler", no_argument, 0, 0},
173 int option_index = 0, opt;
175 setlocale(LC_ALL, "");
177 /* Disable output buffering to make redirects in .xsession actually useful for debugging */
178 if (!isatty(fileno(stdout)))
179 setbuf(stdout, NULL);
183 while ((opt = getopt_long(argc, argv, "c:CvaL:hld:V", long_options, &option_index)) != -1) {
186 LOG("Autostart disabled using -a\n");
191 layout_path = sstrdup(optarg);
192 delete_layout_path = false;
195 FREE(override_configpath);
196 override_configpath = sstrdup(optarg);
199 LOG("Checking configuration file only (-C)\n");
200 only_check_config = true;
203 printf("i3 version " I3_VERSION " © 2009-2011 Michael Stapelberg and contributors\n");
209 LOG("Enabling debug loglevel %s\n", optarg);
210 add_loglevel(optarg);
213 /* DEPRECATED, ignored for the next 3 versions (3.e, 3.f, 3.g) */
216 if (strcmp(long_options[option_index].name, "force-xinerama") == 0) {
217 force_xinerama = true;
218 ELOG("Using Xinerama instead of RandR. This option should be "
219 "avoided at all cost because it does not refresh the list "
220 "of screens, so you cannot configure displays at runtime. "
221 "Please check if your driver really does not support RandR "
222 "and disable this option as soon as you can.\n");
224 } else if (strcmp(long_options[option_index].name, "disable-signalhandler") == 0) {
225 disable_signalhandler = true;
227 } else if (strcmp(long_options[option_index].name, "restart") == 0) {
229 layout_path = sstrdup(optarg);
230 delete_layout_path = true;
235 fprintf(stderr, "Usage: %s [-c configfile] [-d loglevel] [-a] [-v] [-V] [-C]\n", argv[0]);
236 fprintf(stderr, "\n");
237 fprintf(stderr, "-a: disable autostart\n");
238 fprintf(stderr, "-L <layoutfile>: load the layout from <layoutfile>\n");
239 fprintf(stderr, "-v: display version and exit\n");
240 fprintf(stderr, "-V: enable verbose mode\n");
241 fprintf(stderr, "-d <loglevel>: enable debug loglevel <loglevel>\n");
242 fprintf(stderr, "-c <configfile>: use the provided configfile instead\n");
243 fprintf(stderr, "-C: check configuration file and exit\n");
244 fprintf(stderr, "--force-xinerama: Use Xinerama instead of RandR. This "
245 "option should only be used if you are stuck with the "
246 "nvidia closed source driver which does not support RandR.\n");
251 LOG("i3 (tree) version " I3_VERSION " starting\n");
253 conn = xcb_connect(NULL, &screens);
254 if (xcb_connection_has_error(conn))
255 errx(EXIT_FAILURE, "Cannot open display\n");
257 xcb_screen_t *root_screen = xcb_aux_get_screen(conn, screens);
258 root = root_screen->root;
259 root_depth = root_screen->root_depth;
260 xcb_get_geometry_cookie_t gcookie = xcb_get_geometry(conn, root);
262 load_configuration(conn, override_configpath, false);
263 if (only_check_config) {
264 LOG("Done checking configuration file. Exiting.\n");
268 if (config.ipc_socket_path == NULL) {
269 /* Fall back to a file name in /tmp/ based on the PID */
270 if ((config.ipc_socket_path = getenv("I3SOCK")) == NULL)
271 config.ipc_socket_path = get_process_filename("ipc-socket");
273 config.ipc_socket_path = sstrdup(config.ipc_socket_path);
276 uint32_t mask = XCB_CW_EVENT_MASK;
277 uint32_t values[] = { XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
278 XCB_EVENT_MASK_STRUCTURE_NOTIFY | /* when the user adds a screen (e.g. video
279 projector), the root window gets a
281 XCB_EVENT_MASK_POINTER_MOTION |
282 XCB_EVENT_MASK_PROPERTY_CHANGE |
283 XCB_EVENT_MASK_ENTER_WINDOW };
284 xcb_void_cookie_t cookie;
285 cookie = xcb_change_window_attributes_checked(conn, root, mask, values);
286 check_error(conn, cookie, "Another window manager seems to be running");
288 xcb_get_geometry_reply_t *greply = xcb_get_geometry_reply(conn, gcookie, NULL);
289 if (greply == NULL) {
290 ELOG("Could not get geometry of the root window, exiting\n");
293 DLOG("root geometry reply: (%d, %d) %d x %d\n", greply->x, greply->y, greply->width, greply->height);
295 /* Place requests for the atoms we need as soon as possible */
296 #define xmacro(atom) \
297 xcb_intern_atom_cookie_t atom ## _cookie = xcb_intern_atom(conn, 0, strlen(#atom), #atom);
298 #include "atoms.xmacro"
301 /* Initialize the Xlib connection */
302 xlibdpy = xkbdpy = XOpenDisplay(NULL);
304 /* Try to load the X cursors and initialize the XKB extension */
305 if (xlibdpy == NULL) {
306 ELOG("ERROR: XOpenDisplay() failed, disabling libXcursor/XKB support\n");
307 xcursor_supported = false;
308 xkb_supported = false;
309 } else if (fcntl(ConnectionNumber(xlibdpy), F_SETFD, FD_CLOEXEC) == -1) {
310 ELOG("Could not set FD_CLOEXEC on xkbdpy\n");
313 xcursor_load_cursors();
319 major = XkbMajorVersion,
320 minor = XkbMinorVersion;
322 if (fcntl(ConnectionNumber(xkbdpy), F_SETFD, FD_CLOEXEC) == -1) {
323 fprintf(stderr, "Could not set FD_CLOEXEC on xkbdpy\n");
328 if (!XkbQueryExtension(xkbdpy,&i1,&xkb_event_base,&errBase,&major,&minor)) {
329 fprintf(stderr, "XKB not supported by X-server\n");
332 /* end of ugliness */
334 if (!XkbSelectEvents(xkbdpy, XkbUseCoreKbd,
335 XkbMapNotifyMask | XkbStateNotifyMask,
336 XkbMapNotifyMask | XkbStateNotifyMask)) {
337 fprintf(stderr, "Could not set XKB event mask\n");
342 /* Setup NetWM atoms */
343 #define xmacro(name) \
345 xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(conn, name ## _cookie, NULL); \
347 ELOG("Could not get atom " #name "\n"); \
350 A_ ## name = reply->atom; \
353 #include "atoms.xmacro"
356 property_handlers_init();
358 /* Set up the atoms we support */
359 xcb_atom_t supported_atoms[] = {
360 #define xmacro(atom) A_ ## atom,
361 #include "atoms.xmacro"
364 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_SUPPORTED, A_ATOM, 32, 7, supported_atoms);
365 /* Set up the window manager’s name */
366 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_SUPPORTING_WM_CHECK, A_WINDOW, 32, 1, &root);
367 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_WM_NAME, A_UTF8_STRING, 8, strlen("i3"), "i3");
369 keysyms = xcb_key_symbols_alloc(conn);
371 xcb_get_numlock_mask(conn);
374 grab_all_keys(conn, false);
376 bool needs_tree_init = true;
378 LOG("Trying to restore the layout from %s...", layout_path);
379 needs_tree_init = !tree_restore(layout_path, greply);
380 if (delete_layout_path)
389 if (force_xinerama) {
392 DLOG("Checking for XRandR...\n");
393 randr_init(&randr_base);
398 struct ev_loop *loop = ev_loop_new(0);
400 die("Could not initialize libev. Bad LIBEV_FLAGS?\n");
402 /* Create the UNIX domain socket for IPC */
403 int ipc_socket = ipc_create_socket(config.ipc_socket_path);
404 if (ipc_socket == -1) {
405 ELOG("Could not create the IPC socket, IPC disabled\n");
407 free(config.ipc_socket_path);
408 struct ev_io *ipc_io = scalloc(sizeof(struct ev_io));
409 ev_io_init(ipc_io, ipc_new_client, ipc_socket, EV_READ);
410 ev_io_start(loop, ipc_io);
413 /* Set up i3 specific atoms like I3_SOCKET_PATH and I3_CONFIG_PATH */
416 struct ev_io *xcb_watcher = scalloc(sizeof(struct ev_io));
417 struct ev_io *xkb = scalloc(sizeof(struct ev_io));
418 struct ev_check *xcb_check = scalloc(sizeof(struct ev_check));
419 struct ev_prepare *xcb_prepare = scalloc(sizeof(struct ev_prepare));
421 ev_io_init(xcb_watcher, xcb_got_event, xcb_get_file_descriptor(conn), EV_READ);
422 ev_io_start(loop, xcb_watcher);
426 ev_io_init(xkb, xkb_got_event, ConnectionNumber(xkbdpy), EV_READ);
427 ev_io_start(loop, xkb);
429 /* Flush the buffer so that libev can properly get new events */
433 ev_check_init(xcb_check, xcb_check_cb);
434 ev_check_start(loop, xcb_check);
436 ev_prepare_init(xcb_prepare, xcb_prepare_cb);
437 ev_prepare_start(loop, xcb_prepare);
441 manage_existing_windows(root);
443 if (!disable_signalhandler)
444 setup_signal_handler();
446 /* Ignore SIGPIPE to survive errors when an IPC client disconnects
447 * while we are sending him a message */
448 signal(SIGPIPE, SIG_IGN);
450 /* Autostarting exec-lines */
452 struct Autostart *exec;
453 TAILQ_FOREACH(exec, &autostarts, autostarts) {
454 LOG("auto-starting %s\n", exec->command);
455 start_application(exec->command);