main.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include "dwm.h"
   3 #include <errno.h>
   4 #include <locale.h>
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <unistd.h>
   9 #include <sys/select.h>
  10 #include <X11/cursorfont.h>
  11 #include <X11/keysym.h>
  12 #include <X11/Xatom.h>
  13 #include <X11/Xproto.h>
  14 #include <X11/Xutil.h>
  15
  16 /* extern */
  17
  18 char stext[256];
  19 int screen, sx, sy, sw, sh, wax, way, waw, wah;
  20 unsigned int bh, ntags;
  21 unsigned int bpos = BARPOS;
  22 unsigned int numlockmask = 0;
  23 Atom wmatom[WMLast], netatom[NetLast];
  24 Bool *seltags;
  25 Bool selscreen = True;
  26 Client *clients = NULL;
  27 Client *sel = NULL;
  28 Client *stack = NULL;
  29 Cursor cursor[CurLast];
  30 Display *dpy;
  31 DC dc = {0};
  32 Window root, barwin;
  33
  34 /* static */
  35
  36 static int (*xerrorxlib)(Display *, XErrorEvent *);
  37 static Bool otherwm, readin;
  38 static Bool running = True;
  39
  40 static void
  41 cleanup(void) {
  42         close(STDIN_FILENO);
  43         while(stack) {
  44                 unban(stack);
  45                 unmanage(stack);
  46         }
  47         if(dc.font.set)
  48                 XFreeFontSet(dpy, dc.font.set);
  49         else
  50                 XFreeFont(dpy, dc.font.xfont);
  51         XUngrabKey(dpy, AnyKey, AnyModifier, root);
  52         XFreePixmap(dpy, dc.drawable);
  53         XFreeGC(dpy, dc.gc);
  54         XDestroyWindow(dpy, barwin);
  55         XFreeCursor(dpy, cursor[CurNormal]);
  56         XFreeCursor(dpy, cursor[CurResize]);
  57         XFreeCursor(dpy, cursor[CurMove]);
  58         XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
  59         XSync(dpy, False);
  60         free(seltags);
  61 }
  62
  63 static unsigned long
  64 initcolor(const char *colstr) {
  65         Colormap cmap = DefaultColormap(dpy, screen);
  66         XColor color;
  67
  68         if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
  69                 eprint("error, cannot allocate color '%s'\n", colstr);
  70         return color.pixel;
  71 }
  72
  73 static void
  74 initfont(const char *fontstr) {
  75         char *def, **missing;
  76         int i, n;
  77
  78         missing = NULL;
  79         if(dc.font.set)
  80                 XFreeFontSet(dpy, dc.font.set);
  81         dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
  82         if(missing) {
  83                 while(n--)
  84                         fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
  85                 XFreeStringList(missing);
  86         }
  87         if(dc.font.set) {
  88                 XFontSetExtents *font_extents;
  89                 XFontStruct **xfonts;
  90                 char **font_names;
  91                 dc.font.ascent = dc.font.descent = 0;
  92                 font_extents = XExtentsOfFontSet(dc.font.set);
  93                 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
  94                 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
  95                         if(dc.font.ascent < (*xfonts)->ascent)
  96                                 dc.font.ascent = (*xfonts)->ascent;
  97                         if(dc.font.descent < (*xfonts)->descent)
  98                                 dc.font.descent = (*xfonts)->descent;
  99                         xfonts++;
 100                 }
 101         }
 102         else {
 103                 if(dc.font.xfont)
 104                         XFreeFont(dpy, dc.font.xfont);
 105                 dc.font.xfont = NULL;
 106                 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr)))
 107                         eprint("error, cannot load font: '%s'\n", fontstr);
 108                 dc.font.ascent = dc.font.xfont->ascent;
 109                 dc.font.descent = dc.font.xfont->descent;
 110         }
 111         dc.font.height = dc.font.ascent + dc.font.descent;
 112 }
 113
 114 static long
 115 getstate(Window w) {
 116         int format, status;
 117         long result = -1;
 118         unsigned char *p = NULL;
 119         unsigned long n, extra;
 120         Atom real;
 121
 122         status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
 123                         &real, &format, &n, &extra, (unsigned char **)&p);
 124         if(status != Success)
 125                 return -1;
 126         if(n != 0)
 127                 result = *p;
 128         XFree(p);
 129         return result;
 130 }
 131
 132 static void
 133 scan(void) {
 134         unsigned int i, num;
 135         Window *wins, d1, d2;
 136         XWindowAttributes wa;
 137
 138         wins = NULL;
 139         if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
 140                 for(i = 0; i < num; i++) {
 141                         if(!XGetWindowAttributes(dpy, wins[i], &wa)
 142                         || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
 143                                 continue;
 144                         if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
 145                                 manage(wins[i], &wa);
 146                 }
 147                 for(i = 0; i < num; i++) { /* now the transients */
 148                         if(!XGetWindowAttributes(dpy, wins[i], &wa))
 149                                 continue;
 150                         if(XGetTransientForHint(dpy, wins[i], &d1)
 151                         && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
 152                                 manage(wins[i], &wa);
 153                 }
 154         }
 155         if(wins)
 156                 XFree(wins);
 157 }
 158
 159 static void
 160 setup(void) {
 161         int i, j;
 162         unsigned int mask;
 163         Window w;
 164         XModifierKeymap *modmap;
 165         XSetWindowAttributes wa;
 166
 167         /* init atoms */
 168         wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
 169         wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
 170         wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
 171         wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
 172         netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
 173         netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
 174         XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
 175                         PropModeReplace, (unsigned char *) netatom, NetLast);
 176         /* init cursors */
 177         cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
 178         cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
 179         cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
 180         /* init modifier map */
 181         modmap = XGetModifierMapping(dpy);
 182         for (i = 0; i < 8; i++)
 183                 for (j = 0; j < modmap->max_keypermod; j++) {
 184                         if(modmap->modifiermap[i * modmap->max_keypermod + j]
 185                                         == XKeysymToKeycode(dpy, XK_Num_Lock))
 186                                 numlockmask = (1 << i);
 187                 }
 188         XFreeModifiermap(modmap);
 189         /* select for events */
 190         wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
 191                 | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
 192         wa.cursor = cursor[CurNormal];
 193         XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
 194         XSelectInput(dpy, root, wa.event_mask);
 195         grabkeys();
 196         compileregs();
 197         for(ntags = 0; tags[ntags]; ntags++);
 198         seltags = emallocz(sizeof(Bool) * ntags);
 199         seltags[0] = True;
 200         /* style */
 201         dc.norm[ColBorder] = initcolor(NORMBORDERCOLOR);
 202         dc.norm[ColBG] = initcolor(NORMBGCOLOR);
 203         dc.norm[ColFG] = initcolor(NORMFGCOLOR);
 204         dc.sel[ColBorder] = initcolor(SELBORDERCOLOR);
 205         dc.sel[ColBG] = initcolor(SELBGCOLOR);
 206         dc.sel[ColFG] = initcolor(SELFGCOLOR);
 207         initfont(FONT);
 208         /* geometry */
 209         sx = sy = 0;
 210         sw = DisplayWidth(dpy, screen);
 211         sh = DisplayHeight(dpy, screen);
 212         initlayouts();
 213         /* bar */
 214         dc.h = bh = dc.font.height + 2;
 215         wa.override_redirect = 1;
 216         wa.background_pixmap = ParentRelative;
 217         wa.event_mask = ButtonPressMask | ExposureMask;
 218         barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0,
 219                         DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
 220                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 221         XDefineCursor(dpy, barwin, cursor[CurNormal]);
 222         updatebarpos();
 223         XMapRaised(dpy, barwin);
 224         strcpy(stext, "dwm-"VERSION);
 225         /* pixmap for everything */
 226         dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
 227         dc.gc = XCreateGC(dpy, root, 0, 0);
 228         XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
 229         if(!dc.font.set)
 230                 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
 231         /* multihead support */
 232         selscreen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
 233 }
 234
 235 /*
 236  * Startup Error handler to check if another window manager
 237  * is already running.
 238  */
 239 static int
 240 xerrorstart(Display *dsply, XErrorEvent *ee) {
 241         otherwm = True;
 242         return -1;
 243 }
 244
 245 /* extern */
 246
 247 Bool
 248 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
 249         char **list = NULL;
 250         int n;
 251         XTextProperty name;
 252
 253         if(!text || size == 0)
 254                 return False;
 255         text[0] = '\0';
 256         XGetTextProperty(dpy, w, &name, atom);
 257         if(!name.nitems)
 258                 return False;
 259         if(name.encoding == XA_STRING)
 260                 strncpy(text, (char *)name.value, size - 1);
 261         else {
 262                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 263                 && n > 0 && *list)
 264                 {
 265                         strncpy(text, *list, size - 1);
 266                         XFreeStringList(list);
 267                 }
 268         }
 269         text[size - 1] = '\0';
 270         XFree(name.value);
 271         return True;
 272 }
 273
 274 void
 275 quit(const char *arg) {
 276         readin = running = False;
 277 }
 278
 279 /* There's no way to check accesses to destroyed windows, thus those cases are
 280  * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
 281  * default error handler, which may call exit.
 282  */
 283 int
 284 xerror(Display *dpy, XErrorEvent *ee) {
 285         if(ee->error_code == BadWindow
 286         || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
 287         || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
 288         || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
 289         || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
 290         || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
 291         || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
 292         || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
 293                 return 0;
 294         fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
 295                 ee->request_code, ee->error_code);
 296         return xerrorxlib(dpy, ee); /* may call exit */
 297 }
 298
 299 int
 300 main(int argc, char *argv[]) {
 301         char *p;
 302         int r, xfd;
 303         fd_set rd;
 304         XEvent ev;
 305
 306         if(argc == 2 && !strcmp("-v", argv[1]))
 307                 eprint("dwm-"VERSION", © 2006-2007 A. R. Garbe, S. van Dijk, J. Salmi, P. Hruby, S. Nagy\n");
 308         else if(argc != 1)
 309                 eprint("usage: dwm [-v]\n");
 310         setlocale(LC_CTYPE, "");
 311         if(!(dpy = XOpenDisplay(0)))
 312                 eprint("dwm: cannot open display\n");
 313         xfd = ConnectionNumber(dpy);
 314         screen = DefaultScreen(dpy);
 315         root = RootWindow(dpy, screen);
 316         otherwm = False;
 317         XSetErrorHandler(xerrorstart);
 318         /* this causes an error if some other window manager is running */
 319         XSelectInput(dpy, root, SubstructureRedirectMask);
 320         XSync(dpy, False);
 321         if(otherwm)
 322                 eprint("dwm: another window manager is already running\n");
 323
 324         XSync(dpy, False);
 325         XSetErrorHandler(NULL);
 326         xerrorxlib = XSetErrorHandler(xerror);
 327         XSync(dpy, False);
 328         setup();
 329         drawstatus();
 330         scan();
 331
 332         /* main event loop, also reads status text from stdin */
 333         XSync(dpy, False);
 334         readin = True;
 335         while(running) {
 336                 FD_ZERO(&rd);
 337                 if(readin)
 338                         FD_SET(STDIN_FILENO, &rd);
 339                 FD_SET(xfd, &rd);
 340                 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
 341                         if(errno == EINTR)
 342                                 continue;
 343                         eprint("select failed\n");
 344                 }
 345                 if(FD_ISSET(STDIN_FILENO, &rd)) {
 346                         switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
 347                         case -1:
 348                                 strncpy(stext, strerror(errno), sizeof stext - 1);
 349                                 stext[sizeof stext - 1] = '\0';
 350                                 readin = False;
 351                                 break;
 352                         case 0:
 353                                 strncpy(stext, "EOF", 4);
 354                                 readin = False;
 355                                 break;
 356                         default:
 357                                 for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
 358                                 for(; p >= stext && *p != '\n'; --p);
 359                                 if(p > stext)
 360                                         strncpy(stext, p + 1, sizeof stext);
 361                         }
 362                         drawstatus();
 363                 }
 364                 while(XPending(dpy)) {
 365                         XNextEvent(dpy, &ev);
 366                         if(handler[ev.type])
 367                                 (handler[ev.type])(&ev); /* call handler */
 368                 }
 369         }
 370         cleanup();
 371         XCloseDisplay(dpy);
 372         return 0;
 373 }