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 "screen.h"
  44 #include "util.h"
  45 #include "statusbar.h"
  46 #include "uicb.h"
  47 #include "window.h"
  48 #include "awesome-client.h"
  49
  50 static int (*xerrorxlib) (Display *, XErrorEvent *);
  51 static Bool running = True;
  52
  53
  54 static inline void
  55 cleanup_buttons(Button *buttons)
  56 {
  57     Button *b, *bn;
  58
  59     for(b = buttons; b; b = bn)
  60     {
  61         bn = b->next;
  62         p_delete(&b->arg);
  63         p_delete(&b);
  64     }
  65 }
  66
  67 void
  68 cleanup_screen(awesome_config *awesomeconf)
  69 {
  70     int i;
  71     Key *k, *kn;
  72     Rule *r, *rn;
  73
  74     XftFontClose(awesomeconf->display, awesomeconf->font);
  75     XUngrabKey(awesomeconf->display, AnyKey, AnyModifier, RootWindow(awesomeconf->display, awesomeconf->phys_screen));
  76     XDestroyWindow(awesomeconf->display, awesomeconf->statusbar.window);
  77     XFreeCursor(awesomeconf->display, awesomeconf->cursor[CurNormal]);
  78     XFreeCursor(awesomeconf->display, awesomeconf->cursor[CurResize]);
  79     XFreeCursor(awesomeconf->display, awesomeconf->cursor[CurMove]);
  80
  81     for(i = 0; i < awesomeconf->ntags; i++)
  82         p_delete(&awesomeconf->tags[i].name);
  83     for(k = awesomeconf->keys; k; k = kn)
  84     {
  85         kn = k->next;
  86         p_delete(&k->arg);
  87         p_delete(&k);
  88     }
  89
  90     cleanup_buttons(awesomeconf->buttons.tag);
  91     cleanup_buttons(awesomeconf->buttons.title);
  92     cleanup_buttons(awesomeconf->buttons.layout);
  93     cleanup_buttons(awesomeconf->buttons.root);
  94     cleanup_buttons(awesomeconf->buttons.client);
  95
  96     for(i = 0; i < awesomeconf->nlayouts; i++)
  97         p_delete(&awesomeconf->layouts[i].symbol);
  98     for(r = awesomeconf->rules; r; r = rn)
  99     {
 100         rn = r->next;
 101         p_delete(&r->prop);
 102         p_delete(&r->tags);
 103         p_delete(&r);
 104     }
 105
 106     p_delete(&awesomeconf->tags);
 107     p_delete(&awesomeconf->layouts);
 108     p_delete(&awesomeconf->configpath);
 109 }
 110
 111 /** Cleanup everything on quit
 112  * \param awesomeconf awesome config
 113  */
 114 static void
 115 cleanup(awesome_config *awesomeconf)
 116 {
 117     int screen;
 118
 119     while(*awesomeconf->clients)
 120     {
 121         client_unban(*awesomeconf->clients);
 122         client_unmanage(*awesomeconf->clients, NormalState, awesomeconf);
 123     }
 124
 125     for(screen = 0; screen < get_screen_count(awesomeconf->display); screen++)
 126         cleanup_screen(&awesomeconf[screen]);
 127
 128     XSetInputFocus(awesomeconf->display, PointerRoot, RevertToPointerRoot, CurrentTime);
 129     XSync(awesomeconf->display, False);
 130
 131     p_delete(&awesomeconf->clients);
 132     p_delete(&awesomeconf);
 133 }
 134
 135 /** Scan X to find windows to manage
 136  * \param screen Screen number
 137  * \param awesomeconf awesome config
 138  */
 139 static void
 140 scan(awesome_config *awesomeconf)
 141 {
 142     unsigned int i, num;
 143     int screen, real_screen;
 144     Window *wins = NULL, d1, d2;
 145     XWindowAttributes wa;
 146
 147     for(screen = 0; screen < ScreenCount(awesomeconf->display); screen++)
 148     {
 149         if(XQueryTree(awesomeconf->display, RootWindow(awesomeconf->display, screen), &d1, &d2, &wins, &num))
 150         {
 151             real_screen = screen;
 152             for(i = 0; i < num; i++)
 153             {
 154                 if(!XGetWindowAttributes(awesomeconf->display, wins[i], &wa)
 155                    || wa.override_redirect
 156                    || XGetTransientForHint(awesomeconf->display, wins[i], &d1))
 157                     continue;
 158                 if(wa.map_state == IsViewable || window_getstate(awesomeconf->display, wins[i]) == IconicState)
 159                 {
 160                     if(screen == 0)
 161                         real_screen = get_screen_bycoord(awesomeconf->display, wa.x, wa.y);
 162                     client_manage(wins[i], &wa, &awesomeconf[real_screen]);
 163                 }
 164             }
 165             /* now the transients */
 166             for(i = 0; i < num; i++)
 167             {
 168                 if(!XGetWindowAttributes(awesomeconf->display, wins[i], &wa))
 169                     continue;
 170                 if(XGetTransientForHint(awesomeconf->display, wins[i], &d1)
 171                    && (wa.map_state == IsViewable || window_getstate(awesomeconf->display, wins[i]) == IconicState))
 172                 {
 173                     if(screen == 0)
 174                         real_screen = get_screen_bycoord(awesomeconf->display, wa.x, wa.y);
 175                     client_manage(wins[i], &wa, &awesomeconf[real_screen]);
 176                 }
 177             }
 178         }
 179         if(wins)
 180             XFree(wins);
 181     }
 182 }
 183
 184 /** Setup everything before running
 185  * \param awesomeconf awesome config ref
 186  * \todo clean things...
 187  */
 188 static void
 189 setup(awesome_config *awesomeconf)
 190 {
 191     XSetWindowAttributes wa;
 192
 193     /* init cursors */
 194     awesomeconf->cursor[CurNormal] = XCreateFontCursor(awesomeconf->display, XC_left_ptr);
 195     awesomeconf->cursor[CurResize] = XCreateFontCursor(awesomeconf->display, XC_sizing);
 196     awesomeconf->cursor[CurMove] = XCreateFontCursor(awesomeconf->display, XC_fleur);
 197
 198     /* select for events */
 199     wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
 200         | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
 201     wa.cursor = awesomeconf->cursor[CurNormal];
 202
 203     XChangeWindowAttributes(awesomeconf->display, RootWindow(awesomeconf->display, awesomeconf->phys_screen), CWEventMask | CWCursor, &wa);
 204
 205     XSelectInput(awesomeconf->display, RootWindow(awesomeconf->display, awesomeconf->phys_screen), wa.event_mask);
 206
 207     grabkeys(awesomeconf);
 208 }
 209
 210 void
 211 setup_screen(awesome_config *awesomeconf, const char *confpath)
 212 {
 213     parse_config(confpath, awesomeconf);
 214     setup(awesomeconf);
 215     initstatusbar(awesomeconf->display, awesomeconf->screen, &awesomeconf->statusbar,
 216             awesomeconf->cursor[CurNormal], awesomeconf->font,
 217             awesomeconf->layouts, awesomeconf->nlayouts);
 218 }
 219
 220 /** Startup Error handler to check if another window manager
 221  * is already running.
 222  * \param disp Display ref
 223  * \param ee Error event
 224  */
 225 static int __attribute__ ((noreturn))
 226 xerrorstart(Display * disp __attribute__ ((unused)), XErrorEvent * ee __attribute__ ((unused)))
 227 {
 228     eprint("awesome: another window manager is already running\n");
 229 }
 230
 231 /** Quit awesome
 232  * \param awesomeconf awesome config
 233  * \param arg nothing
 234  * \ingroup ui_callback
 235  */
 236 void
 237 uicb_quit(awesome_config *awesomeconf __attribute__((unused)),
 238           const char *arg __attribute__ ((unused)))
 239 {
 240     running = False;
 241 }
 242
 243 /* There's no way to check accesses to destroyed windows, thus those cases are
 244  * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
 245  * default error handler, which may call exit.
 246  */
 247 int
 248 xerror(Display * edpy, XErrorEvent * ee)
 249 {
 250     if(ee->error_code == BadWindow
 251        || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
 252        || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
 253        || (ee->request_code == X_PolyFillRectangle
 254            && ee->error_code == BadDrawable)
 255        || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
 256        || (ee->request_code == X_ConfigureWindow
 257            && ee->error_code == BadMatch) || (ee->request_code == X_GrabKey
 258                                               && ee->error_code == BadAccess)
 259        || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
 260         return 0;
 261     fprintf(stderr, "awesome: fatal error: request code=%d, error code=%d\n",
 262             ee->request_code, ee->error_code);
 263
 264     return xerrorxlib(edpy, ee);        /* may call exit */
 265 }
 266
 267 /** Hello, this is main
 268  * \param argc who knows
 269  * \param argv who knows
 270  * \return EXIT_SUCCESS I hope
 271  */
 272 typedef void event_handler (XEvent *, awesome_config *);
 273 int
 274 main(int argc, char *argv[])
 275 {
 276     char buf[1024];
 277     const char *confpath = NULL;
 278     int r, xfd, e_dummy, csfd;
 279     fd_set rd;
 280     XEvent ev;
 281     Display * dpy;
 282     awesome_config *awesomeconf;
 283     int shape_event, randr_event_base;
 284     int screen;
 285     enum { NetSupported, NetWMName, NetLast };   /* EWMH atoms */
 286     Atom netatom[NetLast];
 287     event_handler **handler;
 288     Client **clients;
 289     struct sockaddr_un *addr;
 290
 291     if(argc >= 2)
 292     {
 293         if(!a_strcmp("-v", argv[1]))
 294         {
 295             printf("awesome-" VERSION " © 2007 Julien Danjou\n");
 296             return EXIT_SUCCESS;
 297         }
 298         else if(!a_strcmp("-c", argv[1]))
 299         {
 300             if(a_strlen(argv[2]))
 301                 confpath = argv[2];
 302             else
 303                 eprint("awesome: -c require a file\n");
 304         }
 305         else
 306             eprint("usage: awesome [-v | -c configfile]\n");
 307     }
 308
 309     /* Tag won't be printed otherwised */
 310     setlocale(LC_CTYPE, "");
 311
 312     if(!(dpy = XOpenDisplay(NULL)))
 313         eprint("awesome: cannot open display\n");
 314
 315     xfd = ConnectionNumber(dpy);
 316
 317     XSetErrorHandler(xerrorstart);
 318     for(screen = 0; screen < ScreenCount(dpy); screen++)
 319         /* this causes an error if some other window manager is running */
 320         XSelectInput(dpy, RootWindow(dpy, screen), SubstructureRedirectMask);
 321
 322     /* need to XSync to validate errorhandler */
 323     XSync(dpy, False);
 324     XSetErrorHandler(NULL);
 325     xerrorxlib = XSetErrorHandler(xerror);
 326     XSync(dpy, False);
 327
 328     /* allocate stuff */
 329     awesomeconf = p_new(awesome_config, get_screen_count(dpy));
 330     clients = p_new(Client *, 1);
 331
 332     for(screen = 0; screen < get_screen_count(dpy); screen++)
 333     {
 334         /* store display */
 335         awesomeconf[screen].display = dpy;
 336
 337         /* set screen */
 338         awesomeconf[screen].screen = screen;
 339         setup_screen(&awesomeconf[screen], confpath);
 340         awesomeconf[screen].clients = clients;
 341         drawstatusbar(&awesomeconf[screen]);
 342     }
 343
 344     netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
 345     netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
 346
 347     /* do this only for real screen */
 348     for(screen = 0; screen < ScreenCount(dpy); screen++)
 349     {
 350         loadawesomeprops(&awesomeconf[screen]);
 351         XChangeProperty(dpy, RootWindow(dpy, screen), netatom[NetSupported],
 352                         XA_ATOM, 32, PropModeReplace, (unsigned char *) netatom, NetLast);
 353     }
 354
 355     handler = p_new(event_handler *, LASTEvent);
 356     handler[ButtonPress] = handle_event_buttonpress;
 357     handler[ConfigureRequest] = handle_event_configurerequest;
 358     handler[ConfigureNotify] = handle_event_configurenotify;
 359     handler[DestroyNotify] = handle_event_destroynotify;
 360     handler[EnterNotify] = handle_event_enternotify;
 361     handler[LeaveNotify] = handle_event_leavenotify;
 362     handler[Expose] = handle_event_expose;
 363     handler[KeyPress] = handle_event_keypress;
 364     handler[MappingNotify] = handle_event_mappingnotify;
 365     handler[MapRequest] = handle_event_maprequest;
 366     handler[PropertyNotify] = handle_event_propertynotify;
 367     handler[UnmapNotify] = handle_event_unmapnotify;
 368
 369     /* check for shape extension */
 370     if((awesomeconf[0].have_shape = XShapeQueryExtension(dpy, &shape_event, &e_dummy)))
 371     {
 372         p_realloc(&handler, shape_event + 1);
 373         handler[shape_event] = handle_event_shape;
 374     }
 375
 376     /* check for randr extension */
 377     if((awesomeconf[0].have_randr = XRRQueryExtension(dpy, &randr_event_base, &e_dummy)))
 378     {
 379         p_realloc(&handler, randr_event_base + RRScreenChangeNotify + 1);
 380         handler[randr_event_base + RRScreenChangeNotify] = handle_event_randr_screen_change_notify;
 381     }
 382
 383     for(screen = 0; screen < get_screen_count(dpy); screen++)
 384     {
 385         awesomeconf[screen].have_shape = awesomeconf[0].have_shape;
 386         awesomeconf[screen].have_randr = awesomeconf[0].have_randr;
 387     }
 388
 389     scan(awesomeconf);
 390
 391     XSync(dpy, False);
 392
 393     /* get socket fd */
 394     csfd = get_client_socket();
 395     addr = get_client_addr(getenv("DISPLAY"));
 396
 397     if(bind(csfd, (const struct sockaddr *) addr, SUN_LEN(addr)))
 398     {
 399         if(errno == EADDRINUSE)
 400         {
 401             if(unlink(addr->sun_path))
 402                 perror("error unlinking existing file");
 403             if(bind(csfd, (const struct sockaddr *) addr, SUN_LEN(addr)))
 404                 perror("error binding UNIX domain socket");
 405         }
 406         else
 407             perror("error binding UNIX domain socket");
 408     }
 409
 410     /* main event loop, also reads status text from socket */
 411     while(running)
 412     {
 413         FD_ZERO(&rd);
 414         if(csfd >= 0)
 415             FD_SET(csfd, &rd);
 416         FD_SET(xfd, &rd);
 417         if(select(MAX(xfd, csfd) + 1, &rd, NULL, NULL, NULL) == -1)
 418         {
 419             if(errno == EINTR)
 420                 continue;
 421             eprint("select failed\n");
 422         }
 423         if(csfd >= 0 && FD_ISSET(csfd, &rd))
 424             switch (r = recv(csfd, buf, sizeof(buf)-1, MSG_TRUNC))
 425             {
 426             case -1:
 427                 perror("awesome: error reading UNIX domain socket");
 428                 a_strncpy(awesomeconf[0].statustext, sizeof(awesomeconf[0].statustext),
 429                           strerror(errno), sizeof(awesomeconf[0].statustext) - 1);
 430                 awesomeconf[0].statustext[sizeof(awesomeconf[0].statustext) - 1] = '\0';
 431                 csfd = -1;
 432                 break;
 433             case 0:
 434                 break;
 435             default:
 436                 if(r >= ssizeof(buf))
 437                     break;
 438                 buf[r] = '\0';
 439                 parse_control(buf, awesomeconf);
 440             }
 441
 442         while(XPending(dpy))
 443         {
 444             XNextEvent(dpy, &ev);
 445             if(handler[ev.type])
 446                 handler[ev.type](&ev, awesomeconf);       /* call handler */
 447         }
 448     }
 449
 450     if(csfd > 0 && close(csfd))
 451         perror("error closing UNIX domain socket");
 452     if(unlink(addr->sun_path))
 453         perror("error unlinking UNIX domain socket");
 454     p_delete(&addr);
 455
 456     cleanup(awesomeconf);
 457     XCloseDisplay(dpy);
 458
 459     return EXIT_SUCCESS;
 460 }
 461 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99