awesome.c

   1 /*
   2  * awesome.c - awesome main functions
   3  *
   4  * Copyright © 2007 Julien Danjou <julien@danjou.info>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  */
  21
  22 #include <errno.h>
  23 #include <locale.h>
  24 #include <stdio.h>
  25 #include <unistd.h>
  26 #include <sys/select.h>
  27 #include <sys/types.h>
  28 #include <sys/stat.h>
  29 #include <sys/socket.h>
  30 #include <sys/un.h>
  31 #include <fcntl.h>
  32 #include <X11/cursorfont.h>
  33 #include <X11/keysym.h>
  34 #include <X11/Xatom.h>
  35 #include <X11/Xproto.h>
  36 #include <X11/Xutil.h>
  37 #include <X11/extensions/shape.h>
  38 #include <X11/extensions/Xrandr.h>
  39
  40 #include "awesome.h"
  41 #include "event.h"
  42 #include "layout.h"
  43 #include "tag.h"
  44 #include "screen.h"
  45 #include "util.h"
  46 #include "statusbar.h"
  47 #include "uicb.h"
  48 #include "window.h"
  49 #include "awesome-client.h"
  50
  51 static int (*xerrorxlib) (Display *, XErrorEvent *);
  52 static Bool running = True;
  53
  54 void
  55 cleanup_screen(awesome_config *awesomeconf)
  56 {
  57     int i;
  58
  59     XftFontClose(awesomeconf->display, awesomeconf->font);
  60     XUngrabKey(awesomeconf->display, AnyKey, AnyModifier, RootWindow(awesomeconf->display, awesomeconf->phys_screen));
  61     XFreePixmap(awesomeconf->display, awesomeconf->statusbar.drawable);
  62     XDestroyWindow(awesomeconf->display, awesomeconf->statusbar.window);
  63     XFreeCursor(awesomeconf->display, awesomeconf->cursor[CurNormal]);
  64     XFreeCursor(awesomeconf->display, awesomeconf->cursor[CurResize]);
  65     XFreeCursor(awesomeconf->display, awesomeconf->cursor[CurMove]);
  66
  67     for(i = 0; i < awesomeconf->ntags; i++)
  68         p_delete(&awesomeconf->tags[i].name);
  69     for(i = 0; i < awesomeconf->nkeys; i++)
  70         p_delete(&awesomeconf->keys[i].arg);
  71     for(i = 0; i < awesomeconf->nlayouts; i++)
  72         p_delete(&awesomeconf->layouts[i].symbol);
  73     for(i = 0; i < awesomeconf->nrules; i++)
  74     {
  75         p_delete(&awesomeconf->rules[i].prop);
  76         p_delete(&awesomeconf->rules[i].tags);
  77     }
  78     p_delete(&awesomeconf->tags);
  79     p_delete(&awesomeconf->layouts);
  80     p_delete(&awesomeconf->rules);
  81     p_delete(&awesomeconf->keys);
  82     p_delete(&awesomeconf->configpath);
  83 }
  84
  85 /** Cleanup everything on quit
  86  * \param awesomeconf awesome config
  87  */
  88 static void
  89 cleanup(awesome_config *awesomeconf)
  90 {
  91     int screen;
  92
  93     while(*awesomeconf->clients)
  94     {
  95         client_unban(*awesomeconf->clients);
  96         client_unmanage(*awesomeconf->clients, NormalState, awesomeconf);
  97     }
  98
  99     for(screen = 0; screen < get_screen_count(awesomeconf->display); screen++)
 100         cleanup_screen(&awesomeconf[screen]);
 101
 102     XSetInputFocus(awesomeconf->display, PointerRoot, RevertToPointerRoot, CurrentTime);
 103     XSync(awesomeconf->display, False);
 104
 105     p_delete(&awesomeconf->clients);
 106     p_delete(&awesomeconf);
 107 }
 108
 109 /** Scan X to find windows to manage
 110  * \param screen Screen number
 111  * \param awesomeconf awesome config
 112  */
 113 static void
 114 scan(awesome_config *awesomeconf)
 115 {
 116     unsigned int i, num;
 117     int screen, real_screen;
 118     Window *wins = NULL, d1, d2;
 119     XWindowAttributes wa;
 120
 121     for(screen = 0; screen < ScreenCount(awesomeconf->display); screen++)
 122     {
 123         if(XQueryTree(awesomeconf->display, RootWindow(awesomeconf->display, screen), &d1, &d2, &wins, &num))
 124         {
 125             real_screen = screen;
 126             for(i = 0; i < num; i++)
 127             {
 128                 if(!XGetWindowAttributes(awesomeconf->display, wins[i], &wa)
 129                    || wa.override_redirect
 130                    || XGetTransientForHint(awesomeconf->display, wins[i], &d1))
 131                     continue;
 132                 if(wa.map_state == IsViewable || window_getstate(awesomeconf->display, wins[i]) == IconicState)
 133                 {
 134                     if(screen == 0)
 135                         real_screen = get_screen_bycoord(awesomeconf->display, wa.x, wa.y);
 136                     client_manage(wins[i], &wa, &awesomeconf[real_screen]);
 137                 }
 138             }
 139             /* now the transients */
 140             for(i = 0; i < num; i++)
 141             {
 142                 if(!XGetWindowAttributes(awesomeconf->display, wins[i], &wa))
 143                     continue;
 144                 if(XGetTransientForHint(awesomeconf->display, wins[i], &d1)
 145                    && (wa.map_state == IsViewable || window_getstate(awesomeconf->display, wins[i]) == IconicState))
 146                 {
 147                     if(screen == 0)
 148                         real_screen = get_screen_bycoord(awesomeconf->display, wa.x, wa.y);
 149                     client_manage(wins[i], &wa, &awesomeconf[real_screen]);
 150                 }
 151             }
 152         }
 153         if(wins)
 154             XFree(wins);
 155     }
 156 }
 157
 158 /** Setup everything before running
 159  * \param awesomeconf awesome config ref
 160  * \todo clean things...
 161  */
 162 static void
 163 setup(awesome_config *awesomeconf)
 164 {
 165     XSetWindowAttributes wa;
 166
 167     /* init cursors */
 168     awesomeconf->cursor[CurNormal] = XCreateFontCursor(awesomeconf->display, XC_left_ptr);
 169     awesomeconf->cursor[CurResize] = XCreateFontCursor(awesomeconf->display, XC_sizing);
 170     awesomeconf->cursor[CurMove] = XCreateFontCursor(awesomeconf->display, XC_fleur);
 171
 172     /* select for events */
 173     wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
 174         | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
 175     wa.cursor = awesomeconf->cursor[CurNormal];
 176
 177     XChangeWindowAttributes(awesomeconf->display, RootWindow(awesomeconf->display, awesomeconf->phys_screen), CWEventMask | CWCursor, &wa);
 178
 179     XSelectInput(awesomeconf->display, RootWindow(awesomeconf->display, awesomeconf->phys_screen), wa.event_mask);
 180
 181     grabkeys(awesomeconf);
 182 }
 183
 184 void
 185 setup_screen(awesome_config *awesomeconf, const char *confpath)
 186 {
 187     parse_config(confpath, awesomeconf);
 188     setup(awesomeconf);
 189     initstatusbar(awesomeconf->display, awesomeconf->screen, &awesomeconf->statusbar,
 190             awesomeconf->cursor[CurNormal], awesomeconf->font,
 191             awesomeconf->layouts, awesomeconf->nlayouts);
 192 }
 193
 194 /** Startup Error handler to check if another window manager
 195  * is already running.
 196  * \param disp Display ref
 197  * \param ee Error event
 198  */
 199 static int __attribute__ ((noreturn))
 200 xerrorstart(Display * disp __attribute__ ((unused)), XErrorEvent * ee __attribute__ ((unused)))
 201 {
 202     eprint("awesome: another window manager is already running\n");
 203 }
 204
 205 /** Quit awesome
 206  * \param awesomeconf awesome config
 207  * \param arg nothing
 208  * \ingroup ui_callback
 209  */
 210 void
 211 uicb_quit(awesome_config *awesomeconf __attribute__((unused)),
 212           const char *arg __attribute__ ((unused)))
 213 {
 214     running = False;
 215 }
 216
 217 /* There's no way to check accesses to destroyed windows, thus those cases are
 218  * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
 219  * default error handler, which may call exit.
 220  */
 221 int
 222 xerror(Display * edpy, XErrorEvent * ee)
 223 {
 224     if(ee->error_code == BadWindow
 225        || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
 226        || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
 227        || (ee->request_code == X_PolyFillRectangle
 228            && ee->error_code == BadDrawable)
 229        || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
 230        || (ee->request_code == X_ConfigureWindow
 231            && ee->error_code == BadMatch) || (ee->request_code == X_GrabKey
 232                                               && ee->error_code == BadAccess)
 233        || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
 234         return 0;
 235     fprintf(stderr, "awesome: fatal error: request code=%d, error code=%d\n",
 236             ee->request_code, ee->error_code);
 237
 238     return xerrorxlib(edpy, ee);        /* may call exit */
 239 }
 240
 241 /** Hello, this is main
 242  * \param argc who knows
 243  * \param argv who knows
 244  * \return EXIT_SUCCESS I hope
 245  */
 246 typedef void event_handler (XEvent *, awesome_config *);
 247 int
 248 main(int argc, char *argv[])
 249 {
 250     char buf[1024];
 251     const char *confpath = NULL;
 252     int r, xfd, e_dummy, csfd;
 253     fd_set rd;
 254     XEvent ev;
 255     Display * dpy;
 256     awesome_config *awesomeconf;
 257     int shape_event, randr_event_base;
 258     int screen;
 259     enum { NetSupported, NetWMName, NetLast };   /* EWMH atoms */
 260     Atom netatom[NetLast];
 261     event_handler **handler;
 262     Client **clients;
 263     struct sockaddr_un *addr;
 264
 265     if(argc >= 2)
 266     {
 267         if(!a_strcmp("-v", argv[1]))
 268         {
 269             printf("awesome-" VERSION " © 2007 Julien Danjou\n");
 270             return EXIT_SUCCESS;
 271         }
 272         else if(!a_strcmp("-c", argv[1]))
 273         {
 274             if(a_strlen(argv[2]))
 275                 confpath = argv[2];
 276             else
 277                 eprint("awesome: -c require a file\n");
 278         }
 279         else
 280             eprint("usage: awesome [-v | -c configfile]\n");
 281     }
 282
 283     /* Tag won't be printed otherwised */
 284     setlocale(LC_CTYPE, "");
 285
 286     if(!(dpy = XOpenDisplay(NULL)))
 287         eprint("awesome: cannot open display\n");
 288
 289     xfd = ConnectionNumber(dpy);
 290
 291     XSetErrorHandler(xerrorstart);
 292     for(screen = 0; screen < ScreenCount(dpy); screen++)
 293         /* this causes an error if some other window manager is running */
 294         XSelectInput(dpy, RootWindow(dpy, screen), SubstructureRedirectMask);
 295
 296     /* need to XSync to validate errorhandler */
 297     XSync(dpy, False);
 298     XSetErrorHandler(NULL);
 299     xerrorxlib = XSetErrorHandler(xerror);
 300     XSync(dpy, False);
 301
 302     /* allocate stuff */
 303     awesomeconf = p_new(awesome_config, get_screen_count(dpy));
 304     clients = p_new(Client *, 1);
 305
 306     for(screen = 0; screen < get_screen_count(dpy); screen++)
 307     {
 308         /* store display */
 309         awesomeconf[screen].display = dpy;
 310
 311         /* set screen */
 312         awesomeconf[screen].screen = screen;
 313         setup_screen(&awesomeconf[screen], confpath);
 314         awesomeconf[screen].clients = clients;
 315         drawstatusbar(&awesomeconf[screen]);
 316     }
 317
 318     netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
 319     netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
 320
 321     /* do this only for real screen */
 322     for(screen = 0; screen < ScreenCount(dpy); screen++)
 323     {
 324         loadawesomeprops(&awesomeconf[screen]);
 325         XChangeProperty(dpy, RootWindow(dpy, screen), netatom[NetSupported],
 326                         XA_ATOM, 32, PropModeReplace, (unsigned char *) netatom, NetLast);
 327     }
 328
 329     handler = p_new(event_handler *, LASTEvent);
 330     handler[ButtonPress] = handle_event_buttonpress;
 331     handler[ConfigureRequest] = handle_event_configurerequest;
 332     handler[ConfigureNotify] = handle_event_configurenotify;
 333     handler[DestroyNotify] = handle_event_destroynotify;
 334     handler[EnterNotify] = handle_event_enternotify;
 335     handler[LeaveNotify] = handle_event_leavenotify;
 336     handler[Expose] = handle_event_expose;
 337     handler[KeyPress] = handle_event_keypress;
 338     handler[MappingNotify] = handle_event_mappingnotify;
 339     handler[MapRequest] = handle_event_maprequest;
 340     handler[PropertyNotify] = handle_event_propertynotify;
 341     handler[UnmapNotify] = handle_event_unmapnotify;
 342
 343     /* check for shape extension */
 344     if((awesomeconf[0].have_shape = XShapeQueryExtension(dpy, &shape_event, &e_dummy)))
 345     {
 346         p_realloc(&handler, shape_event + 1);
 347         handler[shape_event] = handle_event_shape;
 348     }
 349
 350     /* check for randr extension */
 351     if((awesomeconf[0].have_randr = XRRQueryExtension(dpy, &randr_event_base, &e_dummy)))
 352     {
 353         p_realloc(&handler, randr_event_base + RRScreenChangeNotify + 1);
 354         handler[randr_event_base + RRScreenChangeNotify] = handle_event_randr_screen_change_notify;
 355     }
 356
 357     for(screen = 0; screen < get_screen_count(dpy); screen++)
 358     {
 359         awesomeconf[screen].have_shape = awesomeconf[0].have_shape;
 360         awesomeconf[screen].have_randr = awesomeconf[0].have_randr;
 361     }
 362
 363     scan(awesomeconf);
 364
 365     XSync(dpy, False);
 366
 367     /* get socket fd */
 368     csfd = get_client_socket();
 369     addr = get_client_addr(getenv("DISPLAY"));
 370
 371     if(bind(csfd, (const struct sockaddr *) addr, SUN_LEN(addr)))
 372     {
 373         if(errno == EADDRINUSE)
 374         {
 375             if(unlink(addr->sun_path))
 376                 perror("error unlinking existing file");
 377             if(bind(csfd, (const struct sockaddr *) addr, SUN_LEN(addr)))
 378                 perror("error binding UNIX domain socket");
 379         }
 380         else
 381             perror("error binding UNIX domain socket");
 382     }
 383
 384     /* main event loop, also reads status text from socket */
 385     while(running)
 386     {
 387         FD_ZERO(&rd);
 388         if(csfd >= 0)
 389             FD_SET(csfd, &rd);
 390         FD_SET(xfd, &rd);
 391         if(select(MAX(xfd, csfd) + 1, &rd, NULL, NULL, NULL) == -1)
 392         {
 393             if(errno == EINTR)
 394                 continue;
 395             eprint("select failed\n");
 396         }
 397         if(csfd >= 0 && FD_ISSET(csfd, &rd))
 398             switch (r = recv(csfd, buf, sizeof(buf)-1, MSG_TRUNC))
 399             {
 400             case -1:
 401                 perror("awesome: error reading UNIX domain socket");
 402                 a_strncpy(awesomeconf[0].statustext, sizeof(awesomeconf[0].statustext),
 403                           strerror(errno), sizeof(awesomeconf[0].statustext) - 1);
 404                 awesomeconf[0].statustext[sizeof(awesomeconf[0].statustext) - 1] = '\0';
 405                 csfd = -1;
 406                 break;
 407             case 0:
 408                 break;
 409             default:
 410                 if(r >= ssizeof(buf))
 411                     break;
 412                 buf[r] = '\0';
 413                 parse_control(buf, awesomeconf);
 414             }
 415
 416         while(XPending(dpy))
 417         {
 418             XNextEvent(dpy, &ev);
 419             if(handler[ev.type])
 420                 handler[ev.type](&ev, awesomeconf);       /* call handler */
 421         }
 422     }
 423
 424     if(csfd > 0 && close(csfd))
 425         perror("error closing UNIX domain socket");
 426     if(unlink(addr->sun_path))
 427         perror("error unlinking UNIX domain socket");
 428     p_delete(&addr);
 429
 430     cleanup(awesomeconf);
 431     XCloseDisplay(dpy);
 432
 433     return EXIT_SUCCESS;
 434 }
 435 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99