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