445 lines
15 KiB
C
445 lines
15 KiB
C
/*
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* vim:ts=4:sw=4:expandtab
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*/
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#include <ev.h>
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#include <fcntl.h>
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#include <limits.h>
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#include "all.h"
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static int xkb_event_base;
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int xkb_current_group;
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extern Con *focused;
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char **start_argv;
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xcb_connection_t *conn;
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xcb_window_t root;
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uint8_t root_depth;
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xcb_key_symbols_t *keysyms;
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/* Those are our connections to X11 for use with libXcursor and XKB */
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Display *xlibdpy, *xkbdpy;
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/* The list of key bindings */
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struct bindings_head *bindings;
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/* The list of exec-lines */
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struct autostarts_head autostarts = TAILQ_HEAD_INITIALIZER(autostarts);
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/* The list of assignments */
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struct assignments_head assignments = TAILQ_HEAD_INITIALIZER(assignments);
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/* We hope that those are supported and set them to true */
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bool xcursor_supported = true;
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bool xkb_supported = true;
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/*
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* This callback is only a dummy, see xcb_prepare_cb and xcb_check_cb.
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* See also man libev(3): "ev_prepare" and "ev_check" - customise your event loop
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*
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*/
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static void xcb_got_event(EV_P_ struct ev_io *w, int revents) {
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/* empty, because xcb_prepare_cb and xcb_check_cb are used */
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}
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/*
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* Flush before blocking (and waiting for new events)
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*
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*/
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static void xcb_prepare_cb(EV_P_ ev_prepare *w, int revents) {
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xcb_flush(conn);
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}
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/*
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* Instead of polling the X connection socket we leave this to
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* xcb_poll_for_event() which knows better than we can ever know.
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*
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*/
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static void xcb_check_cb(EV_P_ ev_check *w, int revents) {
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xcb_generic_event_t *event;
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while ((event = xcb_poll_for_event(conn)) != NULL) {
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if (event->response_type == 0) {
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ELOG("X11 Error received! sequence %x\n", event->sequence);
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continue;
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}
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/* Strip off the highest bit (set if the event is generated) */
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int type = (event->response_type & 0x7F);
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handle_event(type, event);
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free(event);
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}
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}
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/*
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* When using xmodmap to change the keyboard mapping, this event
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* is only sent via XKB. Therefore, we need this special handler.
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*
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*/
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static void xkb_got_event(EV_P_ struct ev_io *w, int revents) {
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DLOG("Handling XKB event\n");
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XkbEvent ev;
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/* When using xmodmap, every change (!) gets an own event.
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* Therefore, we just read all events and only handle the
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* mapping_notify once. */
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bool mapping_changed = false;
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while (XPending(xkbdpy)) {
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XNextEvent(xkbdpy, (XEvent*)&ev);
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/* While we should never receive a non-XKB event,
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* better do sanity checking */
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if (ev.type != xkb_event_base)
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continue;
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if (ev.any.xkb_type == XkbMapNotify) {
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mapping_changed = true;
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continue;
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}
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if (ev.any.xkb_type != XkbStateNotify) {
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ELOG("Unknown XKB event received (type %d)\n", ev.any.xkb_type);
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continue;
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}
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/* See The XKB Extension: Library Specification, section 14.1 */
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/* We check if the current group (each group contains
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* two levels) has been changed. Mode_switch activates
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* group XkbGroup2Index */
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if (xkb_current_group == ev.state.group)
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continue;
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xkb_current_group = ev.state.group;
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if (ev.state.group == XkbGroup2Index) {
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DLOG("Mode_switch enabled\n");
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grab_all_keys(conn, true);
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}
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if (ev.state.group == XkbGroup1Index) {
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DLOG("Mode_switch disabled\n");
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ungrab_all_keys(conn);
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grab_all_keys(conn, false);
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}
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}
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if (!mapping_changed)
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return;
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DLOG("Keyboard mapping changed, updating keybindings\n");
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xcb_key_symbols_free(keysyms);
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keysyms = xcb_key_symbols_alloc(conn);
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xcb_get_numlock_mask(conn);
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ungrab_all_keys(conn);
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DLOG("Re-grabbing...\n");
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translate_keysyms();
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grab_all_keys(conn, (xkb_current_group == XkbGroup2Index));
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DLOG("Done\n");
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}
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int main(int argc, char *argv[]) {
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//parse_cmd("[ foo ] attach, attach ; focus");
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int screens;
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char *override_configpath = NULL;
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bool autostart = true;
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char *layout_path = NULL;
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bool delete_layout_path = false;
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bool only_check_config = false;
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bool force_xinerama = false;
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bool disable_signalhandler = false;
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static struct option long_options[] = {
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{"no-autostart", no_argument, 0, 'a'},
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{"config", required_argument, 0, 'c'},
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{"version", no_argument, 0, 'v'},
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{"help", no_argument, 0, 'h'},
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{"layout", required_argument, 0, 'L'},
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{"restart", required_argument, 0, 0},
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{"force-xinerama", no_argument, 0, 0},
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{"disable-signalhandler", no_argument, 0, 0},
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{0, 0, 0, 0}
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};
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int option_index = 0, opt;
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setlocale(LC_ALL, "");
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/* Disable output buffering to make redirects in .xsession actually useful for debugging */
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if (!isatty(fileno(stdout)))
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setbuf(stdout, NULL);
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start_argv = argv;
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while ((opt = getopt_long(argc, argv, "c:CvaL:hld:V", long_options, &option_index)) != -1) {
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switch (opt) {
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case 'a':
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LOG("Autostart disabled using -a\n");
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autostart = false;
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break;
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case 'L':
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FREE(layout_path);
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layout_path = sstrdup(optarg);
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delete_layout_path = false;
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break;
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case 'c':
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FREE(override_configpath);
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override_configpath = sstrdup(optarg);
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break;
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case 'C':
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LOG("Checking configuration file only (-C)\n");
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only_check_config = true;
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break;
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case 'v':
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printf("i3 version " I3_VERSION " © 2009-2011 Michael Stapelberg and contributors\n");
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exit(EXIT_SUCCESS);
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case 'V':
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set_verbosity(true);
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break;
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case 'd':
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LOG("Enabling debug loglevel %s\n", optarg);
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add_loglevel(optarg);
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break;
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case 'l':
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/* DEPRECATED, ignored for the next 3 versions (3.e, 3.f, 3.g) */
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break;
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case 0:
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if (strcmp(long_options[option_index].name, "force-xinerama") == 0) {
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force_xinerama = true;
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ELOG("Using Xinerama instead of RandR. This option should be "
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"avoided at all cost because it does not refresh the list "
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"of screens, so you cannot configure displays at runtime. "
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"Please check if your driver really does not support RandR "
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"and disable this option as soon as you can.\n");
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break;
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} else if (strcmp(long_options[option_index].name, "disable-signalhandler") == 0) {
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disable_signalhandler = true;
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break;
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} else if (strcmp(long_options[option_index].name, "restart") == 0) {
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FREE(layout_path);
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layout_path = sstrdup(optarg);
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delete_layout_path = true;
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break;
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}
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/* fall-through */
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default:
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fprintf(stderr, "Usage: %s [-c configfile] [-d loglevel] [-a] [-v] [-V] [-C]\n", argv[0]);
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fprintf(stderr, "\n");
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fprintf(stderr, "-a: disable autostart\n");
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fprintf(stderr, "-L <layoutfile>: load the layout from <layoutfile>\n");
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fprintf(stderr, "-v: display version and exit\n");
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fprintf(stderr, "-V: enable verbose mode\n");
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fprintf(stderr, "-d <loglevel>: enable debug loglevel <loglevel>\n");
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fprintf(stderr, "-c <configfile>: use the provided configfile instead\n");
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fprintf(stderr, "-C: check configuration file and exit\n");
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fprintf(stderr, "--force-xinerama: Use Xinerama instead of RandR. This "
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"option should only be used if you are stuck with the "
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"nvidia closed source driver which does not support RandR.\n");
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exit(EXIT_FAILURE);
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}
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}
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LOG("i3 (tree) version " I3_VERSION " starting\n");
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conn = xcb_connect(NULL, &screens);
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if (xcb_connection_has_error(conn))
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errx(EXIT_FAILURE, "Cannot open display\n");
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xcb_screen_t *root_screen = xcb_aux_get_screen(conn, screens);
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root = root_screen->root;
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root_depth = root_screen->root_depth;
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load_configuration(conn, override_configpath, false);
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if (only_check_config) {
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LOG("Done checking configuration file. Exiting.\n");
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exit(0);
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}
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if (config.ipc_socket_path == NULL)
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config.ipc_socket_path = getenv("I3SOCK");
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/* Fall back to a file name in /tmp/ based on the PID */
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if (config.ipc_socket_path == NULL)
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config.ipc_socket_path = get_process_filename("i3-ipc-socket");
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uint32_t mask = XCB_CW_EVENT_MASK;
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uint32_t values[] = { XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
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XCB_EVENT_MASK_STRUCTURE_NOTIFY | /* when the user adds a screen (e.g. video
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projector), the root window gets a
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ConfigureNotify */
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XCB_EVENT_MASK_POINTER_MOTION |
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XCB_EVENT_MASK_PROPERTY_CHANGE |
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XCB_EVENT_MASK_ENTER_WINDOW };
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xcb_void_cookie_t cookie;
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cookie = xcb_change_window_attributes_checked(conn, root, mask, values);
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check_error(conn, cookie, "Another window manager seems to be running");
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/* Place requests for the atoms we need as soon as possible */
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#define xmacro(atom) \
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xcb_intern_atom_cookie_t atom ## _cookie = xcb_intern_atom(conn, 0, strlen(#atom), #atom);
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#include "atoms.xmacro"
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#undef xmacro
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/* Initialize the Xlib connection */
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xlibdpy = xkbdpy = XOpenDisplay(NULL);
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/* Try to load the X cursors and initialize the XKB extension */
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if (xlibdpy == NULL) {
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ELOG("ERROR: XOpenDisplay() failed, disabling libXcursor/XKB support\n");
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xcursor_supported = false;
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xkb_supported = false;
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} else if (fcntl(ConnectionNumber(xlibdpy), F_SETFD, FD_CLOEXEC) == -1) {
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ELOG("Could not set FD_CLOEXEC on xkbdpy\n");
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return 1;
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} else {
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xcursor_load_cursors();
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/*init_xkb();*/
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}
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if (xkb_supported) {
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int errBase,
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major = XkbMajorVersion,
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minor = XkbMinorVersion;
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if (fcntl(ConnectionNumber(xkbdpy), F_SETFD, FD_CLOEXEC) == -1) {
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fprintf(stderr, "Could not set FD_CLOEXEC on xkbdpy\n");
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return 1;
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}
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int i1;
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if (!XkbQueryExtension(xkbdpy,&i1,&xkb_event_base,&errBase,&major,&minor)) {
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fprintf(stderr, "XKB not supported by X-server\n");
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return 1;
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}
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/* end of ugliness */
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if (!XkbSelectEvents(xkbdpy, XkbUseCoreKbd,
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XkbMapNotifyMask | XkbStateNotifyMask,
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XkbMapNotifyMask | XkbStateNotifyMask)) {
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fprintf(stderr, "Could not set XKB event mask\n");
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return 1;
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}
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}
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/* Setup NetWM atoms */
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#define xmacro(name) \
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do { \
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xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(conn, name ## _cookie, NULL); \
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if (!reply) { \
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ELOG("Could not get atom " #name "\n"); \
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exit(-1); \
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} \
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A_ ## name = reply->atom; \
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free(reply); \
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} while (0);
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#include "atoms.xmacro"
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#undef xmacro
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property_handlers_init();
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/* Set up the atoms we support */
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xcb_atom_t supported_atoms[] = {
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#define xmacro(atom) A_ ## atom,
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#include "atoms.xmacro"
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#undef xmacro
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};
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xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_SUPPORTED, A_ATOM, 32, 7, supported_atoms);
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/* Set up the window manager’s name */
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xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_SUPPORTING_WM_CHECK, A_WINDOW, 32, 1, &root);
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xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_WM_NAME, A_UTF8_STRING, 8, strlen("i3"), "i3");
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keysyms = xcb_key_symbols_alloc(conn);
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xcb_get_numlock_mask(conn);
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translate_keysyms();
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grab_all_keys(conn, false);
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bool needs_tree_init = true;
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if (layout_path) {
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LOG("Trying to restore the layout from %s...", layout_path);
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needs_tree_init = !tree_restore(layout_path);
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if (delete_layout_path)
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unlink(layout_path);
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free(layout_path);
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}
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if (needs_tree_init)
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tree_init();
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if (force_xinerama) {
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xinerama_init();
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} else {
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DLOG("Checking for XRandR...\n");
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randr_init(&randr_base);
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}
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tree_render();
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struct ev_loop *loop = ev_loop_new(0);
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if (loop == NULL)
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die("Could not initialize libev. Bad LIBEV_FLAGS?\n");
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/* Create the UNIX domain socket for IPC */
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int ipc_socket = ipc_create_socket(config.ipc_socket_path);
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if (ipc_socket == -1) {
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ELOG("Could not create the IPC socket, IPC disabled\n");
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} else {
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struct ev_io *ipc_io = scalloc(sizeof(struct ev_io));
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ev_io_init(ipc_io, ipc_new_client, ipc_socket, EV_READ);
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ev_io_start(loop, ipc_io);
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}
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/* Set up i3 specific atoms like I3_SOCKET_PATH and I3_CONFIG_PATH */
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x_set_i3_atoms();
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struct ev_io *xcb_watcher = scalloc(sizeof(struct ev_io));
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struct ev_io *xkb = scalloc(sizeof(struct ev_io));
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struct ev_check *xcb_check = scalloc(sizeof(struct ev_check));
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struct ev_prepare *xcb_prepare = scalloc(sizeof(struct ev_prepare));
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ev_io_init(xcb_watcher, xcb_got_event, xcb_get_file_descriptor(conn), EV_READ);
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ev_io_start(loop, xcb_watcher);
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if (xkb_supported) {
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ev_io_init(xkb, xkb_got_event, ConnectionNumber(xkbdpy), EV_READ);
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ev_io_start(loop, xkb);
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/* Flush the buffer so that libev can properly get new events */
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XFlush(xkbdpy);
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}
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ev_check_init(xcb_check, xcb_check_cb);
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ev_check_start(loop, xcb_check);
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ev_prepare_init(xcb_prepare, xcb_prepare_cb);
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ev_prepare_start(loop, xcb_prepare);
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xcb_flush(conn);
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manage_existing_windows(root);
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if (!disable_signalhandler)
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setup_signal_handler();
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/* Ignore SIGPIPE to survive errors when an IPC client disconnects
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* while we are sending him a message */
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signal(SIGPIPE, SIG_IGN);
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/* Autostarting exec-lines */
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if (autostart) {
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struct Autostart *exec;
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TAILQ_FOREACH(exec, &autostarts, autostarts) {
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LOG("auto-starting %s\n", exec->command);
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start_application(exec->command);
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}
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}
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ev_loop(loop, 0);
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}
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