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gri3-wm/src/mainx.c

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/*
* vim:ts=8:expandtab
*
* i3 - an improved dynamic tiling window manager
*
* © 2009-2010 Michael Stapelberg and contributors
*
* See file LICENSE for license information.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdbool.h>
#include <assert.h>
#include <limits.h>
#include <locale.h>
#include <fcntl.h>
#include <getopt.h>
#include <X11/XKBlib.h>
#include <X11/extensions/XKB.h>
#include <xcb/xcb.h>
#include <xcb/xcb_atom.h>
#include <xcb/xcb_aux.h>
#include <xcb/xcb_event.h>
#include <xcb/xcb_property.h>
#include <xcb/xcb_keysyms.h>
#include <xcb/xcb_icccm.h>
#include <ev.h>
#include "config.h"
#include "data.h"
#include "debug.h"
#include "handlers.h"
#include "click.h"
#include "i3.h"
#include "layout.h"
#include "queue.h"
#include "table.h"
#include "util.h"
#include "xcb.h"
#include "randr.h"
#include "manage.h"
#include "ipc.h"
#include "log.h"
#include "sighandler.h"
xcb_connection_t *global_conn;
/* 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;
xcb_key_symbols_t *keysyms;
/* The list of key bindings */
struct bindings_head *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];
xcb_window_t root;
int num_screens = 0;
/* The depth of the root screen (used e.g. for creating new pixmaps later) */
uint8_t root_depth;
/* We hope that XKB is supported and set this to false */
bool xkb_supported = true;
/*
* 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);
}
}
/*
* When using xmodmap to change the keyboard mapping, this event
* is only sent via XKB. Therefore, we need this special handler.
*
*/
static void xkb_got_event(EV_P_ struct ev_io *w, int revents) {
DLOG("Handling XKB event\n");
XEvent ev;
/* When using xmodmap, every change (!) gets an own event.
* Therefore, we just read all events and only handle the
* mapping_notify once (we do not receive any other XKB
* events anyway). */
while (XPending(xkbdpy))
XNextEvent(xkbdpy, &ev);
xcb_key_symbols_free(keysyms);
keysyms = xcb_key_symbols_alloc(global_conn);
xcb_get_numlock_mask(global_conn);
ungrab_all_keys(global_conn);
DLOG("Re-grabbing...\n");
grab_all_keys(global_conn);
DLOG("Done\n");
}
int main(int argc, char *argv[], char *env[]) {
int i, screens, opt;
char *override_configpath = NULL;
bool autostart = true;
bool only_check_config = false;
xcb_connection_t *conn;
xcb_property_handlers_t prophs;
xcb_intern_atom_cookie_t atom_cookies[NUM_ATOMS];
static struct option long_options[] = {
{"no-autostart", no_argument, 0, 'a'},
{"config", required_argument, 0, 'c'},
{"version", no_argument, 0, 'v'},
{"help", no_argument, 0, 'h'},
{0, 0, 0, 0}
};
int option_index = 0;
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_long(argc, argv, "c:Cvahld:V", long_options, &option_index)) != -1) {
switch (opt) {
case 'a':
LOG("Autostart disabled using -a\n");
autostart = false;
break;
case 'c':
override_configpath = sstrdup(optarg);
break;
case 'C':
LOG("Checking configuration file only (-C)\n");
only_check_config = true;
break;
case 'v':
printf("i3 version " I3_VERSION " © 2009 Michael Stapelberg and contributors\n");
exit(EXIT_SUCCESS);
case 'V':
set_verbosity(true);
break;
case 'd':
LOG("Enabling debug loglevel %s\n", optarg);
add_loglevel(optarg);
break;
case 'l':
/* DEPRECATED, ignored for the next 3 versions (3.e, 3.f, 3.g) */
break;
default:
fprintf(stderr, "Usage: %s [-c configfile] [-d loglevel] [-a] [-v] [-V] [-C]\n", argv[0]);
fprintf(stderr, "\n");
fprintf(stderr, "-a: disable autostart\n");
fprintf(stderr, "-v: display version and exit\n");
fprintf(stderr, "-V: enable verbose mode\n");
fprintf(stderr, "-d <loglevel>: enable debug loglevel <loglevel>\n");
fprintf(stderr, "-c <configfile>: use the provided configfile instead\n");
fprintf(stderr, "-C: check configuration file and exit\n");
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 = global_conn = xcb_connect(NULL, &screens);
if (xcb_connection_has_error(conn))
die("Cannot open display\n");
load_configuration(conn, override_configpath, false);
if (only_check_config) {
LOG("Done checking configuration file. Exiting.\n");
exit(0);
}
/* Create the initial container on the first workspace. This used to
* be part of init_table, but since it possibly requires an X
* connection and a loaded configuration (default mode for new
* containers may be stacking, which requires a new window to be
* created), it had to be delayed. */
expand_table_cols(TAILQ_FIRST(workspaces));
expand_table_rows(TAILQ_FIRST(workspaces));
/* 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);
REQUEST_ATOM(WM_CLIENT_LEADER);
REQUEST_ATOM(_NET_CURRENT_DESKTOP);
REQUEST_ATOM(_NET_ACTIVE_WINDOW);
REQUEST_ATOM(_NET_WORKAREA);
/* 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) {
ELOG("ERROR: XkbOpenDisplay() failed, disabling XKB support\n");
xkb_supported = false;
}
if (xkb_supported) {
if (fcntl(ConnectionNumber(xkbdpy), F_SETFD, FD_CLOEXEC) == -1) {
fprintf(stderr, "Could not set FD_CLOEXEC on xkbdpy\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 */
if (!XkbSelectEvents(xkbdpy, XkbUseCoreKbd, XkbMapNotifyMask, XkbMapNotifyMask)) {
fprintf(stderr, "Could not set XKB event mask\n");
return 1;
}
}
/* Initialize event loop using libev */
struct ev_loop *loop = ev_loop_new(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_io *xkb = 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);
if (xkb_supported) {
ev_io_init(xkb, xkb_got_event, ConnectionNumber(xkbdpy), EV_READ);
ev_io_start(loop, xkb);
/* Flush the buffer so that libev can properly get new events */
XFlush(xkbdpy);
}
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);
/* Motion notify = user moved his cursor (over the root window and may
* cross virtual screen boundaries doing that) */
xcb_event_set_motion_notify_handler(&evenths, handle_motion_notify, NULL);
/* Mapping notify = keyboard mapping changed (Xmodmap), re-grab bindings */
xcb_event_set_mapping_notify_handler(&evenths, handle_mapping_notify, 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 */
xcb_screen_t *root_screen = xcb_aux_get_screen(conn, screens);
root = root_screen->root;
root_depth = root_screen->root_depth;
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_POINTER_MOTION |
XCB_EVENT_MASK_PROPERTY_CHANGE |
XCB_EVENT_MASK_ENTER_WINDOW };
xcb_void_cookie_t cookie;
cookie = xcb_change_window_attributes_checked(conn, root, mask, values);
check_error(conn, cookie, "Another window manager seems to be running");
/* Setup NetWM atoms */
#define GET_ATOM(name) { \
xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(conn, atom_cookies[name], NULL); \
if (!reply) { \
ELOG("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);
GET_ATOM(WM_CLIENT_LEADER);
GET_ATOM(_NET_CURRENT_DESKTOP);
GET_ATOM(_NET_ACTIVE_WINDOW);
GET_ATOM(_NET_WORKAREA);
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);
/* Watch WM_CLIENT_LEADER (= logical parent window for toolbars etc.) */
xcb_property_set_handler(&prophs, atoms[WM_CLIENT_LEADER], UINT_MAX, handle_clientleader_change, NULL);
/* Watch WM_HINTS (contains the urgent property) */
xcb_property_set_handler(&prophs, WM_HINTS, UINT_MAX, handle_hints, 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");
keysyms = xcb_key_symbols_alloc(conn);
xcb_get_numlock_mask(conn);
grab_all_keys(conn);
DLOG("Checking for XRandR...\n");
int randr_base;
initialize_randr(conn, &randr_base);
xcb_event_set_handler(&evenths,
randr_base + XCB_RANDR_SCREEN_CHANGE_NOTIFY,
handle_screen_change,
NULL);
xcb_flush(conn);
/* 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) {
ELOG("Could not get pointer position\n");
return 1;
}
Output *screen = get_output_containing(reply->root_x, reply->root_y);
if (screen == NULL) {
ELOG("ERROR: No screen at %d x %d, starting on the first screen\n",
reply->root_x, reply->root_y);
screen = get_first_output();
}
DLOG("Starting on %p\n", screen->current_workspace);
c_ws = screen->current_workspace;
manage_existing_windows(conn, &prophs, root);
/* Create the UNIX domain socket for IPC */
if (config.ipc_socket_path != NULL) {
int ipc_socket = ipc_create_socket(config.ipc_socket_path);
if (ipc_socket == -1) {
ELOG("Could not create the IPC socket, IPC disabled\n");
} else {
struct ev_io *ipc_io = scalloc(sizeof(struct ev_io));
ev_io_init(ipc_io, ipc_new_client, ipc_socket, EV_READ);
ev_io_start(loop, ipc_io);
}
}
/* Handle the events which arrived until now */
xcb_check_cb(NULL, NULL, 0);
setup_signal_handler();
/* Ungrab the server to receive events and enter libev’s eventloop */
xcb_ungrab_server(conn);
/* Autostarting exec-lines */
struct Autostart *exec;
if (autostart) {
TAILQ_FOREACH(exec, &autostarts, autostarts) {
LOG("auto-starting %s\n", exec->command);
start_application(exec->command);
}
}
ev_loop(loop, 0);
/* not reached */
return 0;
}
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