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 <X11/cursorfont.h>
  28 #include <X11/keysym.h>
  29 #include <X11/Xatom.h>
  30 #include <X11/Xproto.h>
  31 #include <X11/Xutil.h>
  32 #include <X11/extensions/shape.h>
  33 #include <X11/extensions/Xrandr.h>
  34
  35 #include "awesome.h"
  36 #include "event.h"
  37 #include "layout.h"
  38 #include "tag.h"
  39 #include "screen.h"
  40 #include "util.h"
  41 #include "statusbar.h"
  42
  43 Client *clients = NULL;
  44 Client *sel = NULL;
  45 Client *stack = NULL;
  46 DC *dc;
  47
  48 static int (*xerrorxlib) (Display *, XErrorEvent *);
  49 static Bool readin = True, running = True;
  50
  51 /** Cleanup everything on quit
  52  * \param drawcontext Drawcontext ref
  53  * \param awesomeconf awesome config
  54  */
  55 static void
  56 cleanup(DC *drawcontext, awesome_config *awesomeconf)
  57 {
  58     int screen, i;
  59
  60     close(STDIN_FILENO);
  61
  62     while(stack)
  63     {
  64         unban(stack);
  65         unmanage(stack, drawcontext, NormalState, awesomeconf);
  66     }
  67
  68     for(screen = 0; screen < get_screen_count(awesomeconf->display); screen++)
  69     {
  70         XftFontClose(awesomeconf->display, drawcontext->font);
  71
  72         XUngrabKey(awesomeconf->display, AnyKey, AnyModifier, RootWindow(awesomeconf->display, awesomeconf[screen].phys_screen));
  73
  74         XFreePixmap(awesomeconf->display, awesomeconf[screen].statusbar.drawable);
  75         XFreeGC(awesomeconf->display, drawcontext[screen].gc);
  76         XDestroyWindow(awesomeconf->display, awesomeconf[screen].statusbar.window);
  77         XFreeCursor(awesomeconf->display, drawcontext[screen].cursor[CurNormal]);
  78         XFreeCursor(awesomeconf->display, drawcontext[screen].cursor[CurResize]);
  79         XFreeCursor(awesomeconf->display, drawcontext[screen].cursor[CurMove]);
  80
  81         for(i = 0; i < awesomeconf[screen].ntags; i++)
  82             p_delete(&awesomeconf[screen].tags[i].name);
  83         for(i = 0; i < awesomeconf[screen].nkeys; i++)
  84             p_delete(&awesomeconf[screen].keys[i].arg);
  85         for(i = 0; i < awesomeconf[screen].nlayouts; i++)
  86             p_delete(&awesomeconf[screen].layouts[i].symbol);
  87         for(i = 0; i < awesomeconf[screen].nrules; i++)
  88         {
  89             p_delete(&awesomeconf[screen].rules[i].prop);
  90             p_delete(&awesomeconf[screen].rules[i].tags);
  91         }
  92         p_delete(&awesomeconf[screen].tags);
  93         p_delete(&awesomeconf[screen].layouts);
  94         p_delete(&awesomeconf[screen].rules);
  95         p_delete(&awesomeconf[screen].keys);
  96     }
  97     XSetInputFocus(awesomeconf->display, PointerRoot, RevertToPointerRoot, CurrentTime);
  98     XSync(awesomeconf->display, False);
  99     p_delete(&awesomeconf);
 100     p_delete(&dc);
 101 }
 102
 103 /** Get a window state (WM_STATE)
 104  * \param disp Display ref
 105  * \param w Client window
 106  * \return state
 107  */
 108 static long
 109 getstate(Display *disp, Window w)
 110 {
 111     int format, status;
 112     long result = -1;
 113     unsigned char *p = NULL;
 114     unsigned long n, extra;
 115     Atom real;
 116     status = XGetWindowProperty(disp, w, XInternAtom(disp, "WM_STATE", False),
 117                                 0L, 2L, False, XInternAtom(disp, "WM_STATE", False),
 118                                 &real, &format, &n, &extra, (unsigned char **) &p);
 119     if(status != Success)
 120         return -1;
 121     if(n != 0)
 122         result = *p;
 123     XFree(p);
 124     return result;
 125 }
 126
 127 /** Scan X to find windows to manage
 128  * \param screen Screen number
 129  * \param drawcontext Drawcontext ref
 130  * \param awesomeconf awesome config
 131  */
 132 static void
 133 scan(DC *drawcontext, awesome_config *awesomeconf)
 134 {
 135     unsigned int i, num;
 136     int screen, real_screen;
 137     Window *wins = NULL, d1, d2;
 138     XWindowAttributes wa;
 139
 140     for(screen = 0; screen < ScreenCount(awesomeconf->display); screen++)
 141     {
 142         if(XQueryTree(awesomeconf->display, RootWindow(awesomeconf->display, screen), &d1, &d2, &wins, &num))
 143         {
 144             real_screen = screen;
 145             for(i = 0; i < num; i++)
 146             {
 147                 if(!XGetWindowAttributes(awesomeconf->display, wins[i], &wa)
 148                    || wa.override_redirect
 149                    || XGetTransientForHint(awesomeconf->display, wins[i], &d1))
 150                     continue;
 151                 if(wa.map_state == IsViewable || getstate(awesomeconf->display, wins[i]) == IconicState)
 152                 {
 153                     if(screen == 0)
 154                         real_screen = get_screen_bycoord(awesomeconf->display, wa.x, wa.y);
 155                     manage(awesomeconf->display, &drawcontext[real_screen], wins[i], &wa, &awesomeconf[real_screen]);
 156                 }
 157             }
 158             /* now the transients */
 159             for(i = 0; i < num; i++)
 160             {
 161                 if(!XGetWindowAttributes(awesomeconf->display, wins[i], &wa))
 162                     continue;
 163                 if(XGetTransientForHint(awesomeconf->display, wins[i], &d1)
 164                    && (wa.map_state == IsViewable || getstate(awesomeconf->display, wins[i]) == IconicState))
 165                 {
 166                     if(screen == 0)
 167                         real_screen = get_screen_bycoord(awesomeconf->display, wa.x, wa.y);
 168                     manage(awesomeconf->display, &drawcontext[real_screen], wins[i], &wa, &awesomeconf[real_screen]);
 169                 }
 170             }
 171         }
 172         if(wins)
 173             XFree(wins);
 174     }
 175 }
 176
 177 /** Setup everything before running
 178  * \param screen Screen number
 179  * \param awesomeconf awesome config ref
 180  * \todo clean things...
 181  */
 182 static void
 183 setup(DC *drawcontext, awesome_config *awesomeconf)
 184 {
 185     XSetWindowAttributes wa;
 186
 187     /* init cursors */
 188     drawcontext->cursor[CurNormal] = XCreateFontCursor(awesomeconf->display, XC_left_ptr);
 189     drawcontext->cursor[CurResize] = XCreateFontCursor(awesomeconf->display, XC_sizing);
 190     drawcontext->cursor[CurMove] = XCreateFontCursor(awesomeconf->display, XC_fleur);
 191
 192     /* select for events */
 193     wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
 194         | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
 195     wa.cursor = drawcontext->cursor[CurNormal];
 196
 197     XChangeWindowAttributes(awesomeconf->display, RootWindow(awesomeconf->display, awesomeconf->phys_screen), CWEventMask | CWCursor, &wa);
 198
 199     XSelectInput(awesomeconf->display, RootWindow(awesomeconf->display, awesomeconf->phys_screen), wa.event_mask);
 200
 201     grabkeys(awesomeconf->display, awesomeconf->phys_screen, awesomeconf);
 202
 203     compileregs(awesomeconf->rules, awesomeconf->nrules);
 204
 205     /* bar */
 206     drawcontext->h = awesomeconf->statusbar.height = drawcontext->font->height + 2;
 207     initstatusbar(awesomeconf->display, awesomeconf->screen, drawcontext, &awesomeconf->statusbar);
 208     drawcontext->gc = XCreateGC(awesomeconf->display, RootWindow(awesomeconf->display, awesomeconf->phys_screen), 0, 0);
 209     XSetLineAttributes(awesomeconf->display, drawcontext->gc, 1, LineSolid, CapButt, JoinMiter);
 210 }
 211
 212 /** Startup Error handler to check if another window manager
 213  * is already running.
 214  * \param disp Display ref
 215  * \param ee Error event
 216  */
 217 static int __attribute__ ((noreturn))
 218 xerrorstart(Display * disp __attribute__ ((unused)), XErrorEvent * ee __attribute__ ((unused)))
 219 {
 220     eprint("awesome: another window manager is already running\n");
 221 }
 222
 223 /** Quit awesome
 224  * \param disp Display ref
 225  * \param drawcontext Drawcontext ref
 226  * \param awesomeconf awesome config
 227  * \param arg nothing
 228  * \ingroup ui_callback
 229  */
 230 void
 231 uicb_quit(Display *disp __attribute__ ((unused)),
 232           DC *drawcontext __attribute__ ((unused)),
 233           awesome_config *awesomeconf __attribute__((unused)),
 234           const char *arg __attribute__ ((unused)))
 235 {
 236     readin = running = False;
 237 }
 238
 239 /* There's no way to check accesses to destroyed windows, thus those cases are
 240  * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
 241  * default error handler, which may call exit.
 242  */
 243 int
 244 xerror(Display * edpy, XErrorEvent * ee)
 245 {
 246     if(ee->error_code == BadWindow
 247        || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
 248        || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
 249        || (ee->request_code == X_PolyFillRectangle
 250            && ee->error_code == BadDrawable)
 251        || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
 252        || (ee->request_code == X_ConfigureWindow
 253            && ee->error_code == BadMatch) || (ee->request_code == X_GrabKey
 254                                               && ee->error_code == BadAccess)
 255        || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
 256         return 0;
 257     fprintf(stderr, "awesome: fatal error: request code=%d, error code=%d\n",
 258             ee->request_code, ee->error_code);
 259
 260     return xerrorxlib(edpy, ee);        /* may call exit */
 261 }
 262
 263 /** Hello, this is main
 264  * \param argc who knows
 265  * \param argv who knows
 266  * \return EXIT_SUCCESS I hope
 267  */
 268 typedef void event_handler (XEvent *, awesome_config *);
 269 int
 270 main(int argc, char *argv[])
 271 {
 272     char *p;
 273     const char *confpath = NULL;
 274     int r, xfd, e_dummy;
 275     fd_set rd;
 276     XEvent ev;
 277     Display * dpy;
 278     awesome_config *awesomeconf;
 279     int shape_event, randr_event_base;
 280     int screen;
 281     enum { NetSupported, NetWMName, NetLast };   /* EWMH atoms */
 282     Atom netatom[NetLast];
 283     event_handler **handler;
 284
 285     if(argc >= 2)
 286     {
 287         if(!a_strcmp("-v", argv[1]))
 288         {
 289             printf("awesome-" VERSION " © 2007 Julien Danjou\n");
 290             return EXIT_SUCCESS;
 291         }
 292         else if(!a_strcmp("-c", argv[1]))
 293         {
 294             if(a_strlen(argv[2]))
 295                 confpath = argv[2];
 296             else
 297                 eprint("awesome: -c require a file\n");
 298         }
 299         else
 300             eprint("usage: awesome [-v | -c configfile]\n");
 301     }
 302
 303     /* Tag won't be printed otherwised */
 304     setlocale(LC_CTYPE, "");
 305
 306     if(!(dpy = XOpenDisplay(NULL)))
 307         eprint("awesome: cannot open display\n");
 308
 309     xfd = ConnectionNumber(dpy);
 310
 311     XSetErrorHandler(xerrorstart);
 312     for(screen = 0; screen < ScreenCount(dpy); screen++)
 313         /* this causes an error if some other window manager is running */
 314         XSelectInput(dpy, RootWindow(dpy, screen), SubstructureRedirectMask);
 315
 316     /* need to XSync to validate errorhandler */
 317     XSync(dpy, False);
 318     XSetErrorHandler(NULL);
 319     xerrorxlib = XSetErrorHandler(xerror);
 320     XSync(dpy, False);
 321
 322     /* allocate stuff */
 323     dc = p_new(DC, get_screen_count(dpy));
 324     awesomeconf = p_new(awesome_config, get_screen_count(dpy));
 325
 326     for(screen = 0; screen < get_screen_count(dpy); screen++)
 327     {
 328         parse_config(dpy, screen, &dc[screen], confpath, &awesomeconf[screen]);
 329         setup(&dc[screen], &awesomeconf[screen]);
 330         drawstatusbar(dpy, &dc[screen], &awesomeconf[screen]);
 331     }
 332
 333     netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
 334     netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
 335
 336     /* do this only for real screen */
 337     for(screen = 0; screen < ScreenCount(dpy); screen++)
 338     {
 339         loadawesomeprops(dpy, &awesomeconf[screen]);
 340         XChangeProperty(dpy, RootWindow(dpy, screen), netatom[NetSupported],
 341                         XA_ATOM, 32, PropModeReplace, (unsigned char *) netatom, NetLast);
 342     }
 343
 344     handler = p_new(event_handler *, LASTEvent);
 345     handler[ButtonPress] = handle_event_buttonpress;
 346     handler[ConfigureRequest] = handle_event_configurerequest;
 347     handler[ConfigureNotify] = handle_event_configurenotify;
 348     handler[DestroyNotify] = handle_event_destroynotify;
 349     handler[EnterNotify] = handle_event_enternotify;
 350     handler[LeaveNotify] = handle_event_leavenotify;
 351     handler[Expose] = handle_event_expose;
 352     handler[KeyPress] = handle_event_keypress;
 353     handler[MappingNotify] = handle_event_mappingnotify;
 354     handler[MapRequest] = handle_event_maprequest;
 355     handler[PropertyNotify] = handle_event_propertynotify;
 356     handler[UnmapNotify] = handle_event_unmapnotify;
 357
 358     /* check for shape extension */
 359     if((awesomeconf[0].have_shape = XShapeQueryExtension(dpy, &shape_event, &e_dummy)))
 360     {
 361         p_realloc(&handler, shape_event + 1);
 362         handler[shape_event] = handle_event_shape;
 363     }
 364
 365     /* check for randr extension */
 366     if((awesomeconf[0].have_randr = XRRQueryExtension(dpy, &randr_event_base, &e_dummy)))
 367     {
 368         p_realloc(&handler, randr_event_base + RRScreenChangeNotify + 1);
 369         handler[randr_event_base + RRScreenChangeNotify] = handle_event_randr_screen_change_notify;
 370     }
 371
 372     for(screen = 0; screen < get_screen_count(dpy); screen++)
 373     {
 374         awesomeconf[screen].have_shape = awesomeconf[0].have_shape;
 375         awesomeconf[screen].have_randr = awesomeconf[0].have_randr;
 376     }
 377
 378     scan(dc, awesomeconf);
 379
 380     XSync(dpy, False);
 381
 382     /* main event loop, also reads status text from stdin */
 383     while(running)
 384     {
 385         FD_ZERO(&rd);
 386         if(readin)
 387             FD_SET(STDIN_FILENO, &rd);
 388         FD_SET(xfd, &rd);
 389         if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1)
 390         {
 391             if(errno == EINTR)
 392                 continue;
 393             eprint("select failed\n");
 394         }
 395         if(FD_ISSET(STDIN_FILENO, &rd))
 396         {
 397             switch (r = read(STDIN_FILENO, awesomeconf[0].statustext, sizeof(awesomeconf[0].statustext) - 1))
 398             {
 399             case -1:
 400                 a_strncpy(awesomeconf[0].statustext, sizeof(awesomeconf[0].statustext),
 401                           strerror(errno), sizeof(awesomeconf[0].statustext) - 1);
 402                 awesomeconf[0].statustext[sizeof(awesomeconf[0].statustext) - 1] = '\0';
 403                 readin = False;
 404                 break;
 405             case 0:
 406                 a_strncpy(awesomeconf[0].statustext, sizeof(awesomeconf[0].statustext),
 407                           "EOF", 4);
 408                 readin = False;
 409                 break;
 410             default:
 411                 for(awesomeconf[0].statustext[r] = '\0', p = awesomeconf[0].statustext + a_strlen(awesomeconf[0].statustext) - 1;
 412                     p >= awesomeconf[0].statustext && *p == '\n'; *p-- = '\0');
 413                 for(; p >= awesomeconf[0].statustext && *p != '\n'; --p);
 414                 if(p > awesomeconf[0].statustext)
 415                     a_strncpy(awesomeconf[0].statustext, sizeof(awesomeconf[0].statustext),
 416                               p + 1, sizeof(awesomeconf[0].statustext));
 417             }
 418             drawstatusbar(dpy, &dc[0], &awesomeconf[0]);
 419         }
 420
 421         while(XPending(dpy))
 422         {
 423             XNextEvent(dpy, &ev);
 424             if(handler[ev.type])
 425                 handler[ev.type](&ev, awesomeconf);       /* call handler */
 426         }
 427     }
 428     cleanup(dc, awesomeconf);
 429     XCloseDisplay(dpy);
 430
 431     return EXIT_SUCCESS;
 432 }