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 <fcntl.h>
  30 #include <X11/cursorfont.h>
  31 #include <X11/keysym.h>
  32 #include <X11/Xatom.h>
  33 #include <X11/Xproto.h>
  34 #include <X11/Xutil.h>
  35 #include <X11/extensions/shape.h>
  36 #include <X11/extensions/Xrandr.h>
  37
  38 #include "awesome.h"
  39 #include "event.h"
  40 #include "layout.h"
  41 #include "tag.h"
  42 #include "screen.h"
  43 #include "util.h"
  44 #include "statusbar.h"
  45 #include "uicb.h"
  46
  47 #define CONTROL_FIFO_PATH ".awesome_ctl"
  48
  49 static int (*xerrorxlib) (Display *, XErrorEvent *);
  50 static Bool running = True;
  51
  52 /** Cleanup everything on quit
  53  * \param awesomeconf awesome config
  54  */
  55 static void
  56 cleanup(awesome_config *awesomeconf)
  57 {
  58     int screen, i;
  59
  60     while(*awesomeconf->clients)
  61     {
  62         unban(*awesomeconf->clients);
  63         unmanage(*awesomeconf->clients, NormalState, awesomeconf);
  64     }
  65
  66     for(screen = 0; screen < get_screen_count(awesomeconf->display); screen++)
  67     {
  68         XftFontClose(awesomeconf->display, awesomeconf->font);
  69
  70         XUngrabKey(awesomeconf->display, AnyKey, AnyModifier, RootWindow(awesomeconf->display, awesomeconf[screen].phys_screen));
  71
  72         XFreePixmap(awesomeconf->display, awesomeconf[screen].statusbar.drawable);
  73         XDestroyWindow(awesomeconf->display, awesomeconf[screen].statusbar.window);
  74         XFreeCursor(awesomeconf->display, awesomeconf[screen].cursor[CurNormal]);
  75         XFreeCursor(awesomeconf->display, awesomeconf[screen].cursor[CurResize]);
  76         XFreeCursor(awesomeconf->display, awesomeconf[screen].cursor[CurMove]);
  77
  78         for(i = 0; i < awesomeconf[screen].ntags; i++)
  79             p_delete(&awesomeconf[screen].tags[i].name);
  80         for(i = 0; i < awesomeconf[screen].nkeys; i++)
  81             p_delete(&awesomeconf[screen].keys[i].arg);
  82         for(i = 0; i < awesomeconf[screen].nlayouts; i++)
  83             p_delete(&awesomeconf[screen].layouts[i].symbol);
  84         for(i = 0; i < awesomeconf[screen].nrules; i++)
  85         {
  86             p_delete(&awesomeconf[screen].rules[i].prop);
  87             p_delete(&awesomeconf[screen].rules[i].tags);
  88         }
  89         p_delete(&awesomeconf[screen].tags);
  90         p_delete(&awesomeconf[screen].layouts);
  91         p_delete(&awesomeconf[screen].rules);
  92         p_delete(&awesomeconf[screen].keys);
  93     }
  94     XSetInputFocus(awesomeconf->display, PointerRoot, RevertToPointerRoot, CurrentTime);
  95     XSync(awesomeconf->display, False);
  96     p_delete(&awesomeconf->clients);
  97     p_delete(&awesomeconf->client_sel);
  98     p_delete(&awesomeconf);
  99 }
 100
 101 /** Get a window state (WM_STATE)
 102  * \param disp Display ref
 103  * \param w Client window
 104  * \return state
 105  */
 106 static long
 107 getstate(Display *disp, Window w)
 108 {
 109     int format, status;
 110     long result = -1;
 111     unsigned char *p = NULL;
 112     unsigned long n, extra;
 113     Atom real;
 114     status = XGetWindowProperty(disp, w, XInternAtom(disp, "WM_STATE", False),
 115                                 0L, 2L, False, XInternAtom(disp, "WM_STATE", False),
 116                                 &real, &format, &n, &extra, (unsigned char **) &p);
 117     if(status != Success)
 118         return -1;
 119     if(n != 0)
 120         result = *p;
 121     p_delete(&p);
 122     return result;
 123 }
 124
 125 /** Scan X to find windows to manage
 126  * \param screen Screen number
 127  * \param awesomeconf awesome config
 128  */
 129 static void
 130 scan(awesome_config *awesomeconf)
 131 {
 132     unsigned int i, num;
 133     int screen, real_screen;
 134     Window *wins = NULL, d1, d2;
 135     XWindowAttributes wa;
 136
 137     for(screen = 0; screen < ScreenCount(awesomeconf->display); screen++)
 138     {
 139         if(XQueryTree(awesomeconf->display, RootWindow(awesomeconf->display, screen), &d1, &d2, &wins, &num))
 140         {
 141             real_screen = screen;
 142             for(i = 0; i < num; i++)
 143             {
 144                 if(!XGetWindowAttributes(awesomeconf->display, wins[i], &wa)
 145                    || wa.override_redirect
 146                    || XGetTransientForHint(awesomeconf->display, wins[i], &d1))
 147                     continue;
 148                 if(wa.map_state == IsViewable || getstate(awesomeconf->display, wins[i]) == IconicState)
 149                 {
 150                     if(screen == 0)
 151                         real_screen = get_screen_bycoord(awesomeconf->display, wa.x, wa.y);
 152                     manage(awesomeconf->display, wins[i], &wa, &awesomeconf[real_screen]);
 153                 }
 154             }
 155             /* now the transients */
 156             for(i = 0; i < num; i++)
 157             {
 158                 if(!XGetWindowAttributes(awesomeconf->display, wins[i], &wa))
 159                     continue;
 160                 if(XGetTransientForHint(awesomeconf->display, wins[i], &d1)
 161                    && (wa.map_state == IsViewable || getstate(awesomeconf->display, wins[i]) == IconicState))
 162                 {
 163                     if(screen == 0)
 164                         real_screen = get_screen_bycoord(awesomeconf->display, wa.x, wa.y);
 165                     manage(awesomeconf->display, wins[i], &wa, &awesomeconf[real_screen]);
 166                 }
 167             }
 168         }
 169         if(wins)
 170             XFree(wins);
 171     }
 172 }
 173
 174 /** Setup everything before running
 175  * \param awesomeconf awesome config ref
 176  * \todo clean things...
 177  */
 178 static void
 179 setup(awesome_config *awesomeconf)
 180 {
 181     XSetWindowAttributes wa;
 182
 183     /* init cursors */
 184     awesomeconf->cursor[CurNormal] = XCreateFontCursor(awesomeconf->display, XC_left_ptr);
 185     awesomeconf->cursor[CurResize] = XCreateFontCursor(awesomeconf->display, XC_sizing);
 186     awesomeconf->cursor[CurMove] = XCreateFontCursor(awesomeconf->display, XC_fleur);
 187
 188     /* select for events */
 189     wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
 190         | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
 191     wa.cursor = awesomeconf->cursor[CurNormal];
 192
 193     XChangeWindowAttributes(awesomeconf->display, RootWindow(awesomeconf->display, awesomeconf->phys_screen), CWEventMask | CWCursor, &wa);
 194
 195     XSelectInput(awesomeconf->display, RootWindow(awesomeconf->display, awesomeconf->phys_screen), wa.event_mask);
 196
 197     grabkeys(awesomeconf);
 198 }
 199
 200 /** Startup Error handler to check if another window manager
 201  * is already running.
 202  * \param disp Display ref
 203  * \param ee Error event
 204  */
 205 static int __attribute__ ((noreturn))
 206 xerrorstart(Display * disp __attribute__ ((unused)), XErrorEvent * ee __attribute__ ((unused)))
 207 {
 208     eprint("awesome: another window manager is already running\n");
 209 }
 210
 211 /** Quit awesome
 212  * \param awesomeconf awesome config
 213  * \param arg nothing
 214  * \ingroup ui_callback
 215  */
 216 void
 217 uicb_quit(awesome_config *awesomeconf __attribute__((unused)),
 218           const char *arg __attribute__ ((unused)))
 219 {
 220     running = False;
 221 }
 222
 223 /* There's no way to check accesses to destroyed windows, thus those cases are
 224  * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
 225  * default error handler, which may call exit.
 226  */
 227 int
 228 xerror(Display * edpy, XErrorEvent * ee)
 229 {
 230     if(ee->error_code == BadWindow
 231        || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
 232        || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
 233        || (ee->request_code == X_PolyFillRectangle
 234            && ee->error_code == BadDrawable)
 235        || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
 236        || (ee->request_code == X_ConfigureWindow
 237            && ee->error_code == BadMatch) || (ee->request_code == X_GrabKey
 238                                               && ee->error_code == BadAccess)
 239        || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
 240         return 0;
 241     fprintf(stderr, "awesome: fatal error: request code=%d, error code=%d\n",
 242             ee->request_code, ee->error_code);
 243
 244     return xerrorxlib(edpy, ee);        /* may call exit */
 245 }
 246
 247 /** Hello, this is main
 248  * \param argc who knows
 249  * \param argv who knows
 250  * \return EXIT_SUCCESS I hope
 251  */
 252 typedef void event_handler (XEvent *, awesome_config *);
 253 int
 254 main(int argc, char *argv[])
 255 {
 256     char *fifopath, buf[1024];
 257     const char *confpath = NULL, *homedir;
 258     int r, cfd, xfd, e_dummy;
 259     fd_set rd;
 260     XEvent ev;
 261     Display * dpy;
 262     awesome_config *awesomeconf;
 263     int shape_event, randr_event_base;
 264     int screen;
 265     enum { NetSupported, NetWMName, NetLast };   /* EWMH atoms */
 266     Atom netatom[NetLast];
 267     event_handler **handler;
 268     Client **clients, **sel;
 269     struct stat fifost;
 270     ssize_t fifopath_len;
 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     sel = p_new(Client *, 1);
 313
 314     for(screen = 0; screen < get_screen_count(dpy); screen++)
 315     {
 316         parse_config(dpy, screen, confpath, &awesomeconf[screen]);
 317         setup(&awesomeconf[screen]);
 318         awesomeconf[screen].clients = clients;
 319         awesomeconf[screen].client_sel = sel;
 320         initstatusbar(awesomeconf[screen].display, screen, &awesomeconf[screen].statusbar,
 321                       awesomeconf[screen].cursor[CurNormal], awesomeconf[screen].font,
 322                       awesomeconf[screen].layouts, awesomeconf[screen].nlayouts);
 323         drawstatusbar(&awesomeconf[screen]);
 324     }
 325
 326     netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
 327     netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
 328
 329     /* do this only for real screen */
 330     for(screen = 0; screen < ScreenCount(dpy); screen++)
 331     {
 332         loadawesomeprops(&awesomeconf[screen]);
 333         XChangeProperty(dpy, RootWindow(dpy, screen), netatom[NetSupported],
 334                         XA_ATOM, 32, PropModeReplace, (unsigned char *) netatom, NetLast);
 335     }
 336
 337     handler = p_new(event_handler *, LASTEvent);
 338     handler[ButtonPress] = handle_event_buttonpress;
 339     handler[ConfigureRequest] = handle_event_configurerequest;
 340     handler[ConfigureNotify] = handle_event_configurenotify;
 341     handler[DestroyNotify] = handle_event_destroynotify;
 342     handler[EnterNotify] = handle_event_enternotify;
 343     handler[LeaveNotify] = handle_event_leavenotify;
 344     handler[Expose] = handle_event_expose;
 345     handler[KeyPress] = handle_event_keypress;
 346     handler[MappingNotify] = handle_event_mappingnotify;
 347     handler[MapRequest] = handle_event_maprequest;
 348     handler[PropertyNotify] = handle_event_propertynotify;
 349     handler[UnmapNotify] = handle_event_unmapnotify;
 350
 351     /* check for shape extension */
 352     if((awesomeconf[0].have_shape = XShapeQueryExtension(dpy, &shape_event, &e_dummy)))
 353     {
 354         p_realloc(&handler, shape_event + 1);
 355         handler[shape_event] = handle_event_shape;
 356     }
 357
 358     /* check for randr extension */
 359     if((awesomeconf[0].have_randr = XRRQueryExtension(dpy, &randr_event_base, &e_dummy)))
 360     {
 361         p_realloc(&handler, randr_event_base + RRScreenChangeNotify + 1);
 362         handler[randr_event_base + RRScreenChangeNotify] = handle_event_randr_screen_change_notify;
 363     }
 364
 365     for(screen = 0; screen < get_screen_count(dpy); screen++)
 366     {
 367         awesomeconf[screen].have_shape = awesomeconf[0].have_shape;
 368         awesomeconf[screen].have_randr = awesomeconf[0].have_randr;
 369     }
 370
 371     scan(awesomeconf);
 372
 373     XSync(dpy, False);
 374
 375     /* construct fifo path */
 376     homedir = getenv("HOME");
 377     fifopath_len = a_strlen(homedir) + a_strlen(CONTROL_FIFO_PATH) + 2;
 378     fifopath = p_new(char, fifopath_len);
 379     a_strcpy(fifopath, fifopath_len, homedir);
 380     a_strcat(fifopath, fifopath_len, "/");
 381     a_strcat(fifopath, fifopath_len, CONTROL_FIFO_PATH);
 382
 383     if(lstat(fifopath, &fifost) == -1)
 384         if(mkfifo(fifopath, 0600) == -1)
 385            perror("error creating control fifo");
 386
 387     cfd = open(fifopath, O_RDONLY | O_NDELAY);
 388
 389     /* main event loop, also reads status text from stdin */
 390     while(running)
 391     {
 392         FD_ZERO(&rd);
 393         if(cfd >= 0)
 394             FD_SET(cfd, &rd);
 395         FD_SET(xfd, &rd);
 396         if(select(MAX(xfd, cfd) + 1, &rd, NULL, NULL, NULL) == -1)
 397         {
 398             if(errno == EINTR)
 399                 continue;
 400             eprint("select failed\n");
 401         }
 402         if(cfd >= 0 && FD_ISSET(cfd, &rd))
 403             switch (r = read(cfd, buf, sizeof(buf)))
 404             {
 405             case -1:
 406                 perror("awesome: error reading fifo");
 407                 a_strncpy(awesomeconf[0].statustext, sizeof(awesomeconf[0].statustext),
 408                           strerror(errno), sizeof(awesomeconf[0].statustext) - 1);
 409                 awesomeconf[0].statustext[sizeof(awesomeconf[0].statustext) - 1] = '\0';
 410                 cfd = -1;
 411                 break;
 412             case 0:
 413                 close(cfd);
 414                 cfd = open(fifopath, O_RDONLY | O_NDELAY);
 415                 break;
 416             default:
 417                 parse_control(buf, awesomeconf);
 418             }
 419
 420         while(XPending(dpy))
 421         {
 422             XNextEvent(dpy, &ev);
 423             if(handler[ev.type])
 424                 handler[ev.type](&ev, awesomeconf);       /* call handler */
 425         }
 426     }
 427
 428     p_delete(&fifopath);
 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