/* * vim:ts=8:expandtab * * i3 - an improved dynamic tiling window manager * * © 2009 Michael Stapelberg and contributors * * See file LICENSE for license information. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "config.h" #include "data.h" #include "debug.h" #include "handlers.h" #include "i3.h" #include "layout.h" #include "queue.h" #include "table.h" #include "util.h" #include "xcb.h" #include "xinerama.h" #include "manage.h" /* This is the path to i3, copied from argv[0] when starting up */ char **start_argv; /* This is our connection to X11 for use with XKB */ Display *xkbdpy; /* The list of key bindings */ struct bindings_head bindings = TAILQ_HEAD_INITIALIZER(bindings); /* The list of exec-lines */ struct autostarts_head autostarts = TAILQ_HEAD_INITIALIZER(autostarts); /* The list of assignments */ struct assignments_head assignments = TAILQ_HEAD_INITIALIZER(assignments); /* This is a list of Stack_Windows, global, for easier/faster access on expose events */ struct stack_wins_head stack_wins = SLIST_HEAD_INITIALIZER(stack_wins); /* The event handlers need to be global because they are accessed by our custom event handler in handle_button_press(), needed for graphical resizing */ xcb_event_handlers_t evenths; xcb_atom_t atoms[NUM_ATOMS]; int num_screens = 0; /* * This callback is only a dummy, see xcb_prepare_cb and xcb_check_cb. * See also man libev(3): "ev_prepare" and "ev_check" - customise your event loop * */ static void xcb_got_event(EV_P_ struct ev_io *w, int revents) { /* empty, because xcb_prepare_cb and xcb_check_cb are used */ } /* * Flush before blocking (and waiting for new events) * */ static void xcb_prepare_cb(EV_P_ ev_prepare *w, int revents) { xcb_flush(evenths.c); } /* * Instead of polling the X connection socket we leave this to * xcb_poll_for_event() which knows better than we can ever know. * */ static void xcb_check_cb(EV_P_ ev_check *w, int revents) { xcb_generic_event_t *event; while ((event = xcb_poll_for_event(evenths.c)) != NULL) { xcb_event_handle(&evenths, event); free(event); } } int main(int argc, char *argv[], char *env[]) { int i, screens, opt; char *override_configpath = NULL; bool autostart = true; xcb_connection_t *conn; xcb_property_handlers_t prophs; xcb_window_t root; xcb_intern_atom_cookie_t atom_cookies[NUM_ATOMS]; setlocale(LC_ALL, ""); /* Disable output buffering to make redirects in .xsession actually useful for debugging */ if (!isatty(fileno(stdout))) setbuf(stdout, NULL); start_argv = argv; while ((opt = getopt(argc, argv, "c:va")) != -1) { switch (opt) { case 'a': LOG("Autostart disabled using -a\n"); autostart = false; break; case 'c': override_configpath = sstrdup(optarg); break; case 'v': printf("i3 version " I3_VERSION " © 2009 Michael Stapelberg and contributors\n"); exit(EXIT_SUCCESS); default: fprintf(stderr, "Usage: %s [-c configfile]\n", argv[0]); exit(EXIT_FAILURE); } } LOG("i3 version " I3_VERSION " starting\n"); /* Initialize the table data structures for each workspace */ init_table(); memset(&evenths, 0, sizeof(xcb_event_handlers_t)); memset(&prophs, 0, sizeof(xcb_property_handlers_t)); conn = xcb_connect(NULL, &screens); if (xcb_connection_has_error(conn)) die("Cannot open display\n"); load_configuration(conn, override_configpath); /* Place requests for the atoms we need as soon as possible */ #define REQUEST_ATOM(name) atom_cookies[name] = xcb_intern_atom(conn, 0, strlen(#name), #name); REQUEST_ATOM(_NET_SUPPORTED); REQUEST_ATOM(_NET_WM_STATE_FULLSCREEN); REQUEST_ATOM(_NET_SUPPORTING_WM_CHECK); REQUEST_ATOM(_NET_WM_NAME); REQUEST_ATOM(_NET_WM_STATE); REQUEST_ATOM(_NET_WM_WINDOW_TYPE); REQUEST_ATOM(_NET_WM_DESKTOP); REQUEST_ATOM(_NET_WM_WINDOW_TYPE_DOCK); REQUEST_ATOM(_NET_WM_WINDOW_TYPE_DIALOG); REQUEST_ATOM(_NET_WM_WINDOW_TYPE_UTILITY); REQUEST_ATOM(_NET_WM_WINDOW_TYPE_TOOLBAR); REQUEST_ATOM(_NET_WM_WINDOW_TYPE_SPLASH); REQUEST_ATOM(_NET_WM_STRUT_PARTIAL); REQUEST_ATOM(WM_PROTOCOLS); REQUEST_ATOM(WM_DELETE_WINDOW); REQUEST_ATOM(UTF8_STRING); REQUEST_ATOM(WM_STATE); /* TODO: this has to be more beautiful somewhen */ int major, minor, error; major = XkbMajorVersion; minor = XkbMinorVersion; int evBase, errBase; if ((xkbdpy = XkbOpenDisplay(getenv("DISPLAY"), &evBase, &errBase, &major, &minor, &error)) == NULL) { fprintf(stderr, "XkbOpenDisplay() failed\n"); return 1; } int i1; if (!XkbQueryExtension(xkbdpy,&i1,&evBase,&errBase,&major,&minor)) { fprintf(stderr, "XKB not supported by X-server\n"); return 1; } /* end of ugliness */ /* Initialize event loop using libev */ struct ev_loop *loop = ev_default_loop(0); if (loop == NULL) die("Could not initialize libev. Bad LIBEV_FLAGS?\n"); struct ev_io *xcb_watcher = scalloc(sizeof(struct ev_io)); struct ev_check *xcb_check = scalloc(sizeof(struct ev_check)); struct ev_prepare *xcb_prepare = scalloc(sizeof(struct ev_prepare)); ev_io_init(xcb_watcher, xcb_got_event, xcb_get_file_descriptor(conn), EV_READ); ev_io_start(loop, xcb_watcher); ev_check_init(xcb_check, xcb_check_cb); ev_check_start(loop, xcb_check); ev_prepare_init(xcb_prepare, xcb_prepare_cb); ev_prepare_start(loop, xcb_prepare); /* Grab the server to delay any events until we enter the eventloop */ xcb_grab_server(conn); xcb_event_handlers_init(conn, &evenths); /* DEBUG: Trap all events and print them */ for (i = 2; i < 128; ++i) xcb_event_set_handler(&evenths, i, handle_event, 0); for (i = 0; i < 256; ++i) xcb_event_set_error_handler(&evenths, i, (xcb_generic_error_handler_t)handle_event, 0); /* Expose = an Application should redraw itself, in this case it’s our titlebars. */ xcb_event_set_expose_handler(&evenths, handle_expose_event, NULL); /* Key presses/releases are pretty obvious, I think */ xcb_event_set_key_press_handler(&evenths, handle_key_press, NULL); xcb_event_set_key_release_handler(&evenths, handle_key_release, NULL); /* Enter window = user moved his mouse over the window */ xcb_event_set_enter_notify_handler(&evenths, handle_enter_notify, NULL); /* Button press = user pushed a mouse button over one of our windows */ xcb_event_set_button_press_handler(&evenths, handle_button_press, NULL); /* Map notify = there is a new window */ xcb_event_set_map_request_handler(&evenths, handle_map_request, &prophs); /* Unmap notify = window disappeared. When sent from a client, we don’t manage it any longer. Usually, the client destroys the window shortly afterwards. */ xcb_event_set_unmap_notify_handler(&evenths, handle_unmap_notify_event, NULL); /* Configure notify = window’s configuration (geometry, stacking, …). We only need it to set up ignore the following enter_notify events */ xcb_event_set_configure_notify_handler(&evenths, handle_configure_event, NULL); /* Configure request = window tried to change size on its own */ xcb_event_set_configure_request_handler(&evenths, handle_configure_request, NULL); /* Client message are sent to the root window. The only interesting client message for us is _NET_WM_STATE, we honour _NET_WM_STATE_FULLSCREEN */ xcb_event_set_client_message_handler(&evenths, handle_client_message, NULL); /* Initialize the property handlers */ xcb_property_handlers_init(&prophs, &evenths); /* Watch size hints (to obey correct aspect ratio) */ xcb_property_set_handler(&prophs, WM_NORMAL_HINTS, UINT_MAX, handle_normal_hints, NULL); /* Get the root window and set the event mask */ root = xcb_aux_get_screen(conn, screens)->root; uint32_t mask = XCB_CW_EVENT_MASK; uint32_t values[] = { XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT | XCB_EVENT_MASK_STRUCTURE_NOTIFY | /* when the user adds a screen (e.g. video projector), the root window gets a ConfigureNotify */ XCB_EVENT_MASK_PROPERTY_CHANGE | XCB_EVENT_MASK_ENTER_WINDOW }; xcb_change_window_attributes(conn, root, mask, values); /* Setup NetWM atoms */ #define GET_ATOM(name) { \ xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(conn, atom_cookies[name], NULL); \ if (!reply) { \ LOG("Could not get atom " #name "\n"); \ exit(-1); \ } \ atoms[name] = reply->atom; \ free(reply); \ } GET_ATOM(_NET_SUPPORTED); GET_ATOM(_NET_WM_STATE_FULLSCREEN); GET_ATOM(_NET_SUPPORTING_WM_CHECK); GET_ATOM(_NET_WM_NAME); GET_ATOM(_NET_WM_STATE); GET_ATOM(_NET_WM_WINDOW_TYPE); GET_ATOM(_NET_WM_DESKTOP); GET_ATOM(_NET_WM_WINDOW_TYPE_DOCK); GET_ATOM(_NET_WM_WINDOW_TYPE_DIALOG); GET_ATOM(_NET_WM_WINDOW_TYPE_UTILITY); GET_ATOM(_NET_WM_WINDOW_TYPE_TOOLBAR); GET_ATOM(_NET_WM_WINDOW_TYPE_SPLASH); GET_ATOM(_NET_WM_STRUT_PARTIAL); GET_ATOM(WM_PROTOCOLS); GET_ATOM(WM_DELETE_WINDOW); GET_ATOM(UTF8_STRING); GET_ATOM(WM_STATE); xcb_property_set_handler(&prophs, atoms[_NET_WM_WINDOW_TYPE], UINT_MAX, handle_window_type, NULL); /* TODO: In order to comply with EWMH, we have to watch _NET_WM_STRUT_PARTIAL */ /* Watch _NET_WM_NAME (= title of the window in UTF-8) property */ xcb_property_set_handler(&prophs, atoms[_NET_WM_NAME], 128, handle_windowname_change, NULL); /* Watch WM_TRANSIENT_FOR property (to which client this popup window belongs) */ xcb_property_set_handler(&prophs, WM_TRANSIENT_FOR, UINT_MAX, handle_transient_for, NULL); /* Watch WM_NAME (= title of the window in compound text) property for legacy applications */ xcb_watch_wm_name(&prophs, 128, handle_windowname_change_legacy, NULL); /* Watch WM_CLASS (= class of the window) */ xcb_property_set_handler(&prophs, WM_CLASS, 128, handle_windowclass_change, NULL); /* Set up the atoms we support */ check_error(conn, xcb_change_property_checked(conn, XCB_PROP_MODE_REPLACE, root, atoms[_NET_SUPPORTED], ATOM, 32, 7, atoms), "Could not set _NET_SUPPORTED"); /* Set up the window manager’s name */ xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, atoms[_NET_SUPPORTING_WM_CHECK], WINDOW, 32, 1, &root); xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, atoms[_NET_WM_NAME], atoms[UTF8_STRING], 8, strlen("i3"), "i3"); xcb_get_numlock_mask(conn); /* Grab the bound keys */ Binding *bind; TAILQ_FOREACH(bind, &bindings, bindings) { LOG("Grabbing %d\n", bind->keycode); if (bind->mods & BIND_MODE_SWITCH) xcb_grab_key(conn, 0, root, 0, bind->keycode, XCB_GRAB_MODE_SYNC, XCB_GRAB_MODE_SYNC); else { /* Grab the key in all combinations */ #define GRAB_KEY(modifier) xcb_grab_key(conn, 0, root, modifier, bind->keycode, \ XCB_GRAB_MODE_SYNC, XCB_GRAB_MODE_ASYNC) GRAB_KEY(bind->mods); GRAB_KEY(bind->mods | xcb_numlock_mask); GRAB_KEY(bind->mods | xcb_numlock_mask | XCB_MOD_MASK_LOCK); } } /* Autostarting exec-lines */ struct Autostart *exec; if (autostart) { TAILQ_FOREACH(exec, &autostarts, autostarts) { LOG("auto-starting %s\n", exec->command); start_application(exec->command); } } /* check for Xinerama */ LOG("Checking for Xinerama...\n"); initialize_xinerama(conn); xcb_flush(conn); manage_existing_windows(conn, &prophs, root); /* Get pointer position to see on which screen we’re starting */ xcb_query_pointer_reply_t *reply; if ((reply = xcb_query_pointer_reply(conn, xcb_query_pointer(conn, root), NULL)) == NULL) { LOG("Could not get pointer position\n"); return 1; } i3Screen *screen = get_screen_containing(reply->root_x, reply->root_y); if (screen == NULL) { LOG("ERROR: No screen at %d x %d\n", reply->root_x, reply->root_y); return 0; } if (screen->current_workspace != 0) { LOG("Ok, I need to go to the other workspace\n"); c_ws = &workspaces[screen->current_workspace]; } /* Handle the events which arrived until now */ xcb_check_cb(NULL, NULL, 0); /* Ungrab the server to receive events and enter libev’s eventloop */ xcb_ungrab_server(conn); ev_loop(loop, 0); /* not reached */ return 0; }