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awesome/awesome.c

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/*
* awesome.c - awesome main functions
*
* Copyright © 2007-2008 Julien Danjou <julien@danjou.info>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#define _GNU_SOURCE
#include <getopt.h>
#include <locale.h>
#include <stdio.h>
#include <unistd.h>
#include <signal.h>
#include <ev.h>
#include <xcb/xcb.h>
#include <xcb/randr.h>
#include <xcb/xcb_aux.h>
#include <xcb/xcb_atom.h>
#include <xcb/xcb_icccm.h>
#include "lua.h"
#include "event.h"
#include "layout.h"
#include "screen.h"
#include "window.h"
#include "client.h"
#include "focus.h"
#include "ewmh.h"
#include "tag.h"
#include "dbus.h"
#include "statusbar.h"
#include "systray.h"
#include "common/socket.h"
#include "common/version.h"
#include "common/configopts.h"
#include "common/xutil.h"
#include "config.h"
awesome_t globalconf;
typedef struct
{
xcb_window_t id;
xcb_query_tree_cookie_t tree_cookie;
} root_win_t;
/** Scan X to find windows to manage.
*/
static void
scan(void)
{
int i, screen, real_screen, tree_c_len;
const int screen_max = xcb_setup_roots_length(xcb_get_setup(globalconf.connection));
root_win_t *root_wins = p_new(root_win_t, screen_max);
xcb_query_tree_reply_t *tree_r;
xcb_window_t *wins = NULL;
xcb_get_window_attributes_cookie_t *attr_wins = NULL;
xcb_get_geometry_cookie_t **geom_wins = NULL;
xcb_get_window_attributes_reply_t *attr_r;
xcb_get_geometry_reply_t *geom_r;
long state;
for(screen = 0; screen < screen_max; screen++)
{
/* Get the root window ID associated to this screen */
root_wins[screen].id = xutil_screen_get(globalconf.connection, screen)->root;
/* Get the window tree associated to this screen */
root_wins[screen].tree_cookie = xcb_query_tree_unchecked(globalconf.connection,
root_wins[screen].id);
}
for(screen = 0; screen < screen_max; screen++)
{
tree_r = xcb_query_tree_reply(globalconf.connection,
root_wins[screen].tree_cookie,
NULL);
if(!tree_r)
continue;
/* Get the tree of the children windows of the current root window */
if(!(wins = xcb_query_tree_children(tree_r)))
fatal("E: cannot get tree children");
tree_c_len = xcb_query_tree_children_length(tree_r);
attr_wins = p_new(xcb_get_window_attributes_cookie_t, tree_c_len);
for(i = 0; i < tree_c_len; i++)
attr_wins[i] = xcb_get_window_attributes_unchecked(globalconf.connection,
wins[i]);
geom_wins = p_new(xcb_get_geometry_cookie_t *, tree_c_len);
for(i = 0; i < tree_c_len; i++)
{
attr_r = xcb_get_window_attributes_reply(globalconf.connection,
attr_wins[i],
NULL);
state = window_getstate(wins[i]);
if(!attr_r || attr_r->override_redirect
|| attr_r->map_state != XCB_MAP_STATE_VIEWABLE
|| state == XCB_WM_WITHDRAWN_STATE)
{
p_delete(&attr_r);
continue;
}
p_delete(&attr_r);
/* Get the geometry of the current window */
geom_wins[i] = p_new(xcb_get_geometry_cookie_t, 1);
*(geom_wins[i]) = xcb_get_geometry_unchecked(globalconf.connection, wins[i]);
}
p_delete(&attr_wins);
for(i = 0; i < tree_c_len; i++)
{
if(!geom_wins[i])
continue;
if(!(geom_r = xcb_get_geometry_reply(globalconf.connection,
*(geom_wins[i]), NULL)))
continue;
real_screen = screen_get_bycoord(globalconf.screens_info, screen,
geom_r->x, geom_r->y);
client_manage(wins[i], geom_r, real_screen);
p_delete(&geom_r);
p_delete(&geom_wins[i]);
}
p_delete(&geom_wins);
p_delete(&tree_r);
}
p_delete(&root_wins);
}
static void
a_xcb_check_cb(EV_P_ ev_check *w, int revents)
{
xcb_generic_event_t *ev;
/* Two level polling:
* We need to first check we have an event to handle
* and if so, we handle them all in a round.
* Then when we have refresh()'ed stuff so maybe new XEvent
* are available and select() won't tell us, so let's check
* with xcb_poll_for_event() again.
*/
while((ev = xcb_poll_for_event(globalconf.connection)))
{
do
{
xcb_handle_event(globalconf.evenths, ev);
/* need to resync */
xcb_aux_sync(globalconf.connection);
p_delete(&ev);
} while((ev = xcb_poll_for_event(globalconf.connection)));
layout_refresh();
statusbar_refresh();
/* need to resync */
xcb_aux_sync(globalconf.connection);
}
layout_refresh();
statusbar_refresh();
xcb_aux_sync(globalconf.connection);
}
static void
a_xcb_io_cb(EV_P_ ev_io *w, int revents)
{
/* empty */
}
/** Startup Error handler to check if another window manager
* is already running.
* \param data Additional optional parameters data.
* \param c X connection.
* \param error Error event.
*/
static int __attribute__ ((noreturn))
xerrorstart(void * data __attribute__ ((unused)),
xcb_connection_t * c __attribute__ ((unused)),
xcb_generic_error_t * error __attribute__ ((unused)))
{
fatal("another window manager is already running");
}
/** Function to exit on some signals.
* \param sig the signal received, unused
*/
static void
exit_on_signal(EV_P_ ev_signal *w, int revents)
{
ev_unloop(EV_A_ 1);
}
/** \brief awesome xerror function.
* There's no way to check accesses to destroyed windows, thus those cases are
* ignored (especially on UnmapNotify's). Other types of errors call Xlibs
* default error handler, which may call exit.
* \param data Currently unused.
* \param c The connectiont to the X server.
* \param e The error event.
* \return 0 if no error, or xerror's xlib return status.
*/
static int
xerror(void *data __attribute__ ((unused)),
xcb_connection_t *c __attribute__ ((unused)),
xcb_generic_error_t *e)
{
xutil_error_t *err = xutil_get_error(e);
if(!err)
return 0;
if(e->error_code == BadWindow
|| (e->error_code == BadMatch && err->request_code == XCB_SET_INPUT_FOCUS)
|| (e->error_code == BadValue && err->request_code == XCB_KILL_CLIENT)
|| (err->request_code == XCB_CONFIGURE_WINDOW && e->error_code == BadMatch))
{
xutil_delete_error(err);
return 0;
}
warn("fatal error: request=%s, error=%s", err->request_label, err->error_label);
xutil_delete_error(err);
/*
* Xlib code was using default X error handler, namely
* '_XDefaultError()', which displays more informations about the
* error and also exit if 'error_code'' equals to
* 'BadImplementation'
*
* \todo display more informations about the error (like the Xlib default error handler)
*/
if(e->error_code == BadImplementation)
exit(EXIT_FAILURE);
return 0;
}
/** Print help and exit(2) with given exit_code.
* \param exit_code The exit code.
*/
static void __attribute__ ((noreturn))
exit_help(int exit_code)
{
FILE *outfile = (exit_code == EXIT_SUCCESS) ? stdout : stderr;
fprintf(outfile,
"Usage: awesome [OPTION]\n\
-h, --help show help\n\
-v, --version show version\n\
-c, --config FILE configuration file to use\n");
exit(exit_code);
}
/** Hello, this is main.
* \param argc Who knows.
* \param argv Who knows.
* \return EXIT_SUCCESS I hope.
*/
int
main(int argc, char **argv)
{
const char *confpath = NULL;
int xfd, i, screen_nbr, opt;
ssize_t cmdlen = 1;
const xcb_query_extension_reply_t *randr_query;
client_t *c;
static struct option long_options[] =
{
{"help", 0, NULL, 'h'},
{"version", 0, NULL, 'v'},
{"config", 1, NULL, 'c'},
{NULL, 0, NULL, 0}
};
/* event loop watchers */
ev_io xio = { .fd = -1 };
ev_check xcheck;
ev_signal sigint;
ev_signal sigterm;
ev_signal sighup;
/* clear the globalconf structure */
p_clear(&globalconf, 1);
globalconf.keygrabber = LUA_REFNIL;
/* save argv */
for(i = 0; i < argc; i++)
cmdlen += a_strlen(argv[i]) + 1;
globalconf.argv = p_new(char, cmdlen);
a_strcpy(globalconf.argv, cmdlen, argv[0]);
for(i = 1; i < argc; i++)
{
a_strcat(globalconf.argv, cmdlen, " ");
a_strcat(globalconf.argv, cmdlen, argv[i]);
}
/* check args */
while((opt = getopt_long(argc, argv, "vhc:",
long_options, NULL)) != -1)
switch(opt)
{
case 'v':
eprint_version("awesome");
break;
case 'h':
exit_help(EXIT_SUCCESS);
break;
case 'c':
if(a_strlen(optarg))
confpath = a_strdup(optarg);
else
fatal("-c option requires a file name");
break;
}
/* Text won't be printed correctly otherwise */
setlocale(LC_CTYPE, "");
globalconf.loop = ev_default_loop(0);
ev_timer_init(&globalconf.timer, &luaA_on_timer, 0., 0.);
/* register function for signals */
ev_signal_init(&sigint, exit_on_signal, SIGINT);
ev_signal_init(&sigterm, &exit_on_signal, SIGTERM);
ev_signal_init(&sighup, &exit_on_signal, SIGHUP);
ev_signal_start(globalconf.loop, &sigint);
ev_signal_start(globalconf.loop, &sigterm);
ev_signal_start(globalconf.loop, &sighup);
ev_unref(globalconf.loop);
ev_unref(globalconf.loop);
ev_unref(globalconf.loop);
/* X stuff */
globalconf.connection = xcb_connect(NULL, &globalconf.default_screen);
if(xcb_connection_has_error(globalconf.connection))
fatal("cannot open display");
/* Get the file descriptor corresponding to the X connection */
xfd = xcb_get_file_descriptor(globalconf.connection);
ev_io_init(&xio, &a_xcb_io_cb, xfd, EV_READ);
ev_io_start(globalconf.loop, &xio);
ev_check_init(&xcheck, &a_xcb_check_cb);
ev_check_start(globalconf.loop, &xcheck);
ev_unref(globalconf.loop);
/* Allocate a handler which will holds all errors and events */
globalconf.evenths = xcb_alloc_event_handlers(globalconf.connection);
xutil_set_error_handler_catch_all(globalconf.evenths, xerrorstart, NULL);
for(screen_nbr = 0;
screen_nbr < xcb_setup_roots_length(xcb_get_setup(globalconf.connection));
screen_nbr++)
{
const uint32_t select_input_val = XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT;
/* This causes an error if some other window manager is running */
xcb_change_window_attributes(globalconf.connection,
xutil_screen_get(globalconf.connection, screen_nbr)->root,
XCB_CW_EVENT_MASK, &select_input_val);
}
/* Need to xcb_flush to validate error handler */
xcb_aux_sync(globalconf.connection);
/* Process all errors in the queue if any */
xcb_poll_for_event_loop(globalconf.evenths);
/* Set the default xerror handler */
xutil_set_error_handler_catch_all(globalconf.evenths, xerror, NULL);
/* Allocate the key symbols */
globalconf.keysyms = xcb_key_symbols_alloc(globalconf.connection);
/* Get the NumLock, ShiftLock and CapsLock masks */
xutil_getlockmask(globalconf.connection, globalconf.keysyms, &globalconf.numlockmask,
&globalconf.shiftlockmask, &globalconf.capslockmask);
/* init Atoms cache and then EWMH atoms */
atom_cache_list_init(&globalconf.atoms);
ewmh_init_atoms();
/* init screens struct */
globalconf.screens_info = screensinfo_new(globalconf.connection);
globalconf.screens = p_new(screen_t, globalconf.screens_info->nscreen);
focus_client_push(NULL);
/* init default font and colors */
globalconf.font = draw_font_new(globalconf.connection, globalconf.default_screen, "sans 8");
xcolor_new(globalconf.connection, globalconf.default_screen, "black", &globalconf.colors.fg);
xcolor_new(globalconf.connection, globalconf.default_screen, "white", &globalconf.colors.bg);
/* init cursors */
globalconf.cursor[CurNormal] = xutil_cursor_new(globalconf.connection, CURSOR_LEFT_PTR);
globalconf.cursor[CurResize] = xutil_cursor_new(globalconf.connection, CURSOR_SIZING);
globalconf.cursor[CurResizeH] = xutil_cursor_new(globalconf.connection, CURSOR_DOUBLE_ARROW_HORIZ);
globalconf.cursor[CurResizeV] = xutil_cursor_new(globalconf.connection, CURSOR_DOUBLE_ARROW_VERT);
globalconf.cursor[CurMove] = xutil_cursor_new(globalconf.connection, CURSOR_FLEUR);
globalconf.cursor[CurTopRight] = xutil_cursor_new(globalconf.connection, CURSOR_TOP_RIGHT_CORNER);
globalconf.cursor[CurTopLeft] = xutil_cursor_new(globalconf.connection, CURSOR_TOP_LEFT_CORNER);
globalconf.cursor[CurBotRight] = xutil_cursor_new(globalconf.connection, CURSOR_BOTTOM_RIGHT_CORNER);
globalconf.cursor[CurBotLeft] = xutil_cursor_new(globalconf.connection, CURSOR_BOTTOM_LEFT_CORNER);
/* init lua */
luaA_init();
/* parse config */
if(!confpath)
confpath = config_file();
if(!luaA_parserc(confpath))
{
const char *default_confpath = AWESOME_CONF_PATH "/awesomerc.lua";
warn("failed to load/parse configuration file %s", confpath);
warn("falling back to: %s", default_confpath);
if(!luaA_parserc(default_confpath))
fatal("failed to load any configuration file");
}
/* scan existing windows */
scan();
/* process all errors in the queue if any */
xcb_poll_for_event_loop(globalconf.evenths);
set_button_press_event_handler(globalconf.evenths, event_handle_buttonpress, NULL);
set_configure_request_event_handler(globalconf.evenths, event_handle_configurerequest, NULL);
set_configure_notify_event_handler(globalconf.evenths, event_handle_configurenotify, NULL);
set_destroy_notify_event_handler(globalconf.evenths, event_handle_destroynotify, NULL);
set_enter_notify_event_handler(globalconf.evenths, event_handle_enternotify, NULL);
set_expose_event_handler(globalconf.evenths, event_handle_expose, NULL);
set_key_press_event_handler(globalconf.evenths, event_handle_keypress, NULL);
set_map_request_event_handler(globalconf.evenths, event_handle_maprequest, NULL);
set_property_notify_event_handler(globalconf.evenths, event_handle_propertynotify, NULL);
set_unmap_notify_event_handler(globalconf.evenths, event_handle_unmapnotify, NULL);
set_client_message_event_handler(globalconf.evenths, event_handle_clientmessage, NULL);
/* check for randr extension */
randr_query = xcb_get_extension_data(globalconf.connection, &xcb_randr_id);
if((globalconf.have_randr = randr_query->present))
xcb_set_event_handler(globalconf.evenths,
(randr_query->first_event + XCB_RANDR_SCREEN_CHANGE_NOTIFY),
(xcb_generic_event_handler_t) event_handle_randr_screen_change_notify,
NULL);
/* do this only for real screen */
for(screen_nbr = 0;
screen_nbr < xcb_setup_roots_length(xcb_get_setup(globalconf.connection));
screen_nbr++)
{
/* select for events */
const uint32_t change_win_vals[] =
{
XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT | XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY
| XCB_EVENT_MASK_ENTER_WINDOW | XCB_EVENT_MASK_LEAVE_WINDOW
| XCB_EVENT_MASK_STRUCTURE_NOTIFY,
globalconf.cursor[CurNormal]
};
xcb_change_window_attributes(globalconf.connection,
xutil_screen_get(globalconf.connection, screen_nbr)->root,
XCB_CW_EVENT_MASK | XCB_CW_CURSOR,
change_win_vals);
ewmh_set_supported_hints(screen_nbr);
systray_init(screen_nbr);
}
xcb_aux_sync(globalconf.connection);
luaA_cs_init();
a_dbus_init();
/* refresh everything before waiting events */
layout_refresh();
statusbar_refresh();
/* main event loop */
ev_loop(globalconf.loop, 0);
/* cleanup event loop */
ev_ref(globalconf.loop);
ev_check_stop(globalconf.loop, &xcheck);
ev_ref(globalconf.loop);
ev_io_stop(globalconf.loop, &xio);
a_dbus_cleanup();
luaA_cs_cleanup();
/* remap all clients since some WM won't handle them otherwise */
for(c = globalconf.clients; c; c = c->next)
client_unban(c);
xcb_aux_sync(globalconf.connection);
xcb_disconnect(globalconf.connection);
return EXIT_SUCCESS;
}
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80
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