dmenu.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include <ctype.h>
   3 #include <locale.h>
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <string.h>
   7 #include <strings.h>
   8 #include <time.h>
   9 #include <unistd.h>
  10
  11 #include <X11/Xlib.h>
  12 #include <X11/Xatom.h>
  13 #include <X11/Xutil.h>
  14 #ifdef XINERAMA
  15 #include <X11/extensions/Xinerama.h>
  16 #endif
  17 #include <X11/Xft/Xft.h>
  18
  19 #include "drw.h"
  20 #include "util.h"
  21
  22 /* macros */
  23 #define INTERSECT(x,y,w,h,r)  (MAX(0, MIN((x)+(w),(r).x_org+(r).width)  - MAX((x),(r).x_org)) \
  24                              * MAX(0, MIN((y)+(h),(r).y_org+(r).height) - MAX((y),(r).y_org)))
  25 #define LENGTH(X)             (sizeof X / sizeof X[0])
  26 #define TEXTW(X)              (drw_fontset_getwidth(drw, (X)) + lrpad)
  27
  28 /* enums */
  29 enum { SchemeNorm, SchemeSel, SchemeOut, SchemeLast }; /* color schemes */
  30
  31 struct item {
  32         char *text;
  33         struct item *left, *right;
  34         int out;
  35 };
  36
  37 static char text[BUFSIZ] = "";
  38 static char *embed;
  39 static int bh, mw, mh;
  40 static int inputw = 0, promptw;
  41 static int lrpad; /* sum of left and right padding */
  42 static size_t cursor;
  43 static struct item *items = NULL;
  44 static struct item *matches, *matchend;
  45 static struct item *prev, *curr, *next, *sel;
  46 static int mon = -1, screen;
  47
  48 static Atom clip, utf8;
  49 static Display *dpy;
  50 static Window root, parentwin, win;
  51 static XIC xic;
  52
  53 static Drw *drw;
  54 static Clr *scheme[SchemeLast];
  55
  56 #include "config.h"
  57
  58 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
  59 static char *(*fstrstr)(const char *, const char *) = strstr;
  60
  61 static void
  62 appenditem(struct item *item, struct item **list, struct item **last)
  63 {
  64         if (*last)
  65                 (*last)->right = item;
  66         else
  67                 *list = item;
  68
  69         item->left = *last;
  70         item->right = NULL;
  71         *last = item;
  72 }
  73
  74 static void
  75 calcoffsets(void)
  76 {
  77         int i, n;
  78
  79         if (lines > 0)
  80                 n = lines * bh;
  81         else
  82                 n = mw - (promptw + inputw + TEXTW("<") + TEXTW(">"));
  83         /* calculate which items will begin the next page and previous page */
  84         for (i = 0, next = curr; next; next = next->right)
  85                 if ((i += (lines > 0) ? bh : MIN(TEXTW(next->text), n)) > n)
  86                         break;
  87         for (i = 0, prev = curr; prev && prev->left; prev = prev->left)
  88                 if ((i += (lines > 0) ? bh : MIN(TEXTW(prev->left->text), n)) > n)
  89                         break;
  90 }
  91
  92 static void
  93 cleanup(void)
  94 {
  95         size_t i;
  96
  97         XUngrabKey(dpy, AnyKey, AnyModifier, root);
  98         for (i = 0; i < SchemeLast; i++)
  99                 free(scheme[i]);
 100         drw_free(drw);
 101         XSync(dpy, False);
 102         XCloseDisplay(dpy);
 103 }
 104
 105 static int
 106 drawitem(struct item *item, int x, int y, int w)
 107 {
 108         if (item == sel)
 109                 drw_setscheme(drw, scheme[SchemeSel]);
 110         else if (item->out)
 111                 drw_setscheme(drw, scheme[SchemeOut]);
 112         else
 113                 drw_setscheme(drw, scheme[SchemeNorm]);
 114
 115         return drw_text(drw, x, y, w, bh, lrpad / 2, item->text, 0);
 116 }
 117
 118 static void
 119 drawmenu(void)
 120 {
 121         unsigned int curpos;
 122         struct item *item;
 123         int x = 0, y = 0, w;
 124
 125         drw_setscheme(drw, scheme[SchemeNorm]);
 126         drw_rect(drw, 0, 0, mw, mh, 1, 1);
 127
 128         if (prompt && *prompt) {
 129                 drw_setscheme(drw, scheme[SchemeSel]);
 130                 x = drw_text(drw, x, 0, promptw, bh, lrpad / 2, prompt, 0);
 131         }
 132         /* draw input field */
 133         w = (lines > 0 || !matches) ? mw - x : inputw;
 134         drw_setscheme(drw, scheme[SchemeNorm]);
 135         drw_text(drw, x, 0, w, bh, lrpad / 2, text, 0);
 136
 137         curpos = TEXTW(text) - TEXTW(&text[cursor]);
 138         if ((curpos += lrpad / 2 - 1) < w) {
 139                 drw_setscheme(drw, scheme[SchemeNorm]);
 140                 drw_rect(drw, x + curpos, 2, 2, bh - 4, 1, 0);
 141         }
 142
 143         if (lines > 0) {
 144                 /* draw vertical list */
 145                 for (item = curr; item != next; item = item->right)
 146                         drawitem(item, x, y += bh, mw - x);
 147         } else if (matches) {
 148                 /* draw horizontal list */
 149                 x += inputw;
 150                 w = TEXTW("<");
 151                 if (curr->left) {
 152                         drw_setscheme(drw, scheme[SchemeNorm]);
 153                         drw_text(drw, x, 0, w, bh, lrpad / 2, "<", 0);
 154                 }
 155                 x += w;
 156                 for (item = curr; item != next; item = item->right)
 157                         x = drawitem(item, x, 0, MIN(TEXTW(item->text), mw - x - TEXTW(">")));
 158                 if (next) {
 159                         w = TEXTW(">");
 160                         drw_setscheme(drw, scheme[SchemeNorm]);
 161                         drw_text(drw, mw - w, 0, w, bh, lrpad / 2, ">", 0);
 162                 }
 163         }
 164         drw_map(drw, win, 0, 0, mw, mh);
 165 }
 166
 167 static void
 168 grabfocus(void)
 169 {
 170         struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000  };
 171         Window focuswin;
 172         int i, revertwin;
 173
 174         for (i = 0; i < 100; ++i) {
 175                 XGetInputFocus(dpy, &focuswin, &revertwin);
 176                 if (focuswin == win)
 177                         return;
 178                 XSetInputFocus(dpy, win, RevertToParent, CurrentTime);
 179                 nanosleep(&ts, NULL);
 180         }
 181         die("cannot grab focus");
 182 }
 183
 184 static void
 185 grabkeyboard(void)
 186 {
 187         struct timespec ts = { .tv_sec = 0, .tv_nsec = 1000000  };
 188         int i;
 189
 190         if (embed)
 191                 return;
 192         /* try to grab keyboard, we may have to wait for another process to ungrab */
 193         for (i = 0; i < 1000; i++) {
 194                 if (XGrabKeyboard(dpy, DefaultRootWindow(dpy), True, GrabModeAsync,
 195                                   GrabModeAsync, CurrentTime) == GrabSuccess)
 196                         return;
 197                 nanosleep(&ts, NULL);
 198         }
 199         die("cannot grab keyboard");
 200 }
 201
 202 static void
 203 match(void)
 204 {
 205         static char **tokv = NULL;
 206         static int tokn = 0;
 207
 208         char buf[sizeof text], *s;
 209         int i, tokc = 0;
 210         size_t len, textsize;
 211         struct item *item, *lprefix, *lsubstr, *prefixend, *substrend;
 212
 213         strcpy(buf, text);
 214         /* separate input text into tokens to be matched individually */
 215         for (s = strtok(buf, " "); s; tokv[tokc - 1] = s, s = strtok(NULL, " "))
 216                 if (++tokc > tokn && !(tokv = realloc(tokv, ++tokn * sizeof *tokv)))
 217                         die("cannot realloc %u bytes:", tokn * sizeof *tokv);
 218         len = tokc ? strlen(tokv[0]) : 0;
 219
 220         matches = lprefix = lsubstr = matchend = prefixend = substrend = NULL;
 221         textsize = strlen(text) + 1;
 222         for (item = items; item && item->text; item++) {
 223                 for (i = 0; i < tokc; i++)
 224                         if (!fstrstr(item->text, tokv[i]))
 225                                 break;
 226                 if (i != tokc) /* not all tokens match */
 227                         continue;
 228                 /* exact matches go first, then prefixes, then substrings */
 229                 if (!tokc || !fstrncmp(text, item->text, textsize))
 230                         appenditem(item, &matches, &matchend);
 231                 else if (!fstrncmp(tokv[0], item->text, len))
 232                         appenditem(item, &lprefix, &prefixend);
 233                 else
 234                         appenditem(item, &lsubstr, &substrend);
 235         }
 236         if (lprefix) {
 237                 if (matches) {
 238                         matchend->right = lprefix;
 239                         lprefix->left = matchend;
 240                 } else
 241                         matches = lprefix;
 242                 matchend = prefixend;
 243         }
 244         if (lsubstr) {
 245                 if (matches) {
 246                         matchend->right = lsubstr;
 247                         lsubstr->left = matchend;
 248                 } else
 249                         matches = lsubstr;
 250                 matchend = substrend;
 251         }
 252         curr = sel = matches;
 253         calcoffsets();
 254 }
 255
 256 static void
 257 insert(const char *str, ssize_t n)
 258 {
 259         if (strlen(text) + n > sizeof text - 1)
 260                 return;
 261         /* move existing text out of the way, insert new text, and update cursor */
 262         memmove(&text[cursor + n], &text[cursor], sizeof text - cursor - MAX(n, 0));
 263         if (n > 0)
 264                 memcpy(&text[cursor], str, n);
 265         cursor += n;
 266         match();
 267 }
 268
 269 static size_t
 270 nextrune(int inc)
 271 {
 272         ssize_t n;
 273
 274         /* return location of next utf8 rune in the given direction (+1 or -1) */
 275         for (n = cursor + inc; n + inc >= 0 && (text[n] & 0xc0) == 0x80; n += inc)
 276                 ;
 277         return n;
 278 }
 279
 280 static void
 281 movewordedge(int dir)
 282 {
 283         if (dir < 0) { /* move cursor to the start of the word*/
 284                 while (cursor > 0 && strchr(worddelimiters, text[nextrune(-1)]))
 285                         cursor = nextrune(-1);
 286                 while (cursor > 0 && !strchr(worddelimiters, text[nextrune(-1)]))
 287                         cursor = nextrune(-1);
 288         } else { /* move cursor to the end of the word */
 289                 while (text[cursor] && strchr(worddelimiters, text[cursor]))
 290                         cursor = nextrune(+1);
 291                 while (text[cursor] && !strchr(worddelimiters, text[cursor]))
 292                         cursor = nextrune(+1);
 293         }
 294 }
 295
 296 static void
 297 keypress(XKeyEvent *ev)
 298 {
 299         char buf[32];
 300         int len;
 301         KeySym ksym;
 302         Status status;
 303
 304         len = XmbLookupString(xic, ev, buf, sizeof buf, &ksym, &status);
 305         switch (status) {
 306         default: /* XLookupNone, XBufferOverflow */
 307                 return;
 308         case XLookupChars:
 309                 goto insert;
 310         case XLookupKeySym:
 311         case XLookupBoth:
 312                 break;
 313         }
 314
 315         if (ev->state & ControlMask) {
 316                 switch(ksym) {
 317                 case XK_a: ksym = XK_Home;      break;
 318                 case XK_b: ksym = XK_Left;      break;
 319                 case XK_c: ksym = XK_Escape;    break;
 320                 case XK_d: ksym = XK_Delete;    break;
 321                 case XK_e: ksym = XK_End;       break;
 322                 case XK_f: ksym = XK_Right;     break;
 323                 case XK_g: ksym = XK_Escape;    break;
 324                 case XK_h: ksym = XK_BackSpace; break;
 325                 case XK_i: ksym = XK_Tab;       break;
 326                 case XK_j: /* fallthrough */
 327                 case XK_J: /* fallthrough */
 328                 case XK_m: /* fallthrough */
 329                 case XK_M: ksym = XK_Return; ev->state &= ~ControlMask; break;
 330                 case XK_n: ksym = XK_Down;      break;
 331                 case XK_p: ksym = XK_Up;        break;
 332
 333                 case XK_k: /* delete right */
 334                         text[cursor] = '\0';
 335                         match();
 336                         break;
 337                 case XK_u: /* delete left */
 338                         insert(NULL, 0 - cursor);
 339                         break;
 340                 case XK_w: /* delete word */
 341                         while (cursor > 0 && strchr(worddelimiters, text[nextrune(-1)]))
 342                                 insert(NULL, nextrune(-1) - cursor);
 343                         while (cursor > 0 && !strchr(worddelimiters, text[nextrune(-1)]))
 344                                 insert(NULL, nextrune(-1) - cursor);
 345                         break;
 346                 case XK_y: /* paste selection */
 347                 case XK_Y:
 348                         XConvertSelection(dpy, (ev->state & ShiftMask) ? clip : XA_PRIMARY,
 349                                           utf8, utf8, win, CurrentTime);
 350                         return;
 351                 case XK_Left:
 352                 case XK_KP_Left:
 353                         movewordedge(-1);
 354                         goto draw;
 355                 case XK_Right:
 356                 case XK_KP_Right:
 357                         movewordedge(+1);
 358                         goto draw;
 359                 case XK_Return:
 360                 case XK_KP_Enter:
 361                         break;
 362                 case XK_bracketleft:
 363                         cleanup();
 364                         exit(1);
 365                 default:
 366                         return;
 367                 }
 368         } else if (ev->state & Mod1Mask) {
 369                 switch(ksym) {
 370                 case XK_b:
 371                         movewordedge(-1);
 372                         goto draw;
 373                 case XK_f:
 374                         movewordedge(+1);
 375                         goto draw;
 376                 case XK_g: ksym = XK_Home;  break;
 377                 case XK_G: ksym = XK_End;   break;
 378                 case XK_h: ksym = XK_Up;    break;
 379                 case XK_j: ksym = XK_Next;  break;
 380                 case XK_k: ksym = XK_Prior; break;
 381                 case XK_l: ksym = XK_Down;  break;
 382                 default:
 383                         return;
 384                 }
 385         }
 386
 387         switch(ksym) {
 388         default:
 389 insert:
 390                 if (!iscntrl(*buf))
 391                         insert(buf, len);
 392                 break;
 393         case XK_Delete:
 394         case XK_KP_Delete:
 395                 if (text[cursor] == '\0')
 396                         return;
 397                 cursor = nextrune(+1);
 398                 /* fallthrough */
 399         case XK_BackSpace:
 400                 if (cursor == 0)
 401                         return;
 402                 insert(NULL, nextrune(-1) - cursor);
 403                 break;
 404         case XK_End:
 405         case XK_KP_End:
 406                 if (text[cursor] != '\0') {
 407                         cursor = strlen(text);
 408                         break;
 409                 }
 410                 if (next) {
 411                         /* jump to end of list and position items in reverse */
 412                         curr = matchend;
 413                         calcoffsets();
 414                         curr = prev;
 415                         calcoffsets();
 416                         while (next && (curr = curr->right))
 417                                 calcoffsets();
 418                 }
 419                 sel = matchend;
 420                 break;
 421         case XK_Escape:
 422                 cleanup();
 423                 exit(1);
 424         case XK_Home:
 425         case XK_KP_Home:
 426                 if (sel == matches) {
 427                         cursor = 0;
 428                         break;
 429                 }
 430                 sel = curr = matches;
 431                 calcoffsets();
 432                 break;
 433         case XK_Left:
 434         case XK_KP_Left:
 435                 if (cursor > 0 && (!sel || !sel->left || lines > 0)) {
 436                         cursor = nextrune(-1);
 437                         break;
 438                 }
 439                 if (lines > 0)
 440                         return;
 441                 /* fallthrough */
 442         case XK_Up:
 443         case XK_KP_Up:
 444                 if (sel && sel->left && (sel = sel->left)->right == curr) {
 445                         curr = prev;
 446                         calcoffsets();
 447                 }
 448                 break;
 449         case XK_Next:
 450         case XK_KP_Next:
 451                 if (!next)
 452                         return;
 453                 sel = curr = next;
 454                 calcoffsets();
 455                 break;
 456         case XK_Prior:
 457         case XK_KP_Prior:
 458                 if (!prev)
 459                         return;
 460                 sel = curr = prev;
 461                 calcoffsets();
 462                 break;
 463         case XK_Return:
 464         case XK_KP_Enter:
 465                 puts((sel && !(ev->state & ShiftMask)) ? sel->text : text);
 466                 if (!(ev->state & ControlMask)) {
 467                         cleanup();
 468                         exit(0);
 469                 }
 470                 if (sel)
 471                         sel->out = 1;
 472                 break;
 473         case XK_Right:
 474         case XK_KP_Right:
 475                 if (text[cursor] != '\0') {
 476                         cursor = nextrune(+1);
 477                         break;
 478                 }
 479                 if (lines > 0)
 480                         return;
 481                 /* fallthrough */
 482         case XK_Down:
 483         case XK_KP_Down:
 484                 if (sel && sel->right && (sel = sel->right) == next) {
 485                         curr = next;
 486                         calcoffsets();
 487                 }
 488                 break;
 489         case XK_Tab:
 490                 if (!sel)
 491                         return;
 492                 strncpy(text, sel->text, sizeof text - 1);
 493                 text[sizeof text - 1] = '\0';
 494                 cursor = strlen(text);
 495                 match();
 496                 break;
 497         }
 498
 499 draw:
 500         drawmenu();
 501 }
 502
 503 static void
 504 paste(void)
 505 {
 506         char *p, *q;
 507         int di;
 508         unsigned long dl;
 509         Atom da;
 510
 511         /* we have been given the current selection, now insert it into input */
 512         if (XGetWindowProperty(dpy, win, utf8, 0, (sizeof text / 4) + 1, False,
 513                            utf8, &da, &di, &dl, &dl, (unsigned char **)&p)
 514             == Success && p) {
 515                 insert(p, (q = strchr(p, '\n')) ? q - p : (ssize_t)strlen(p));
 516                 XFree(p);
 517         }
 518         drawmenu();
 519 }
 520
 521 static void
 522 readstdin(void)
 523 {
 524         char buf[sizeof text], *p;
 525         size_t i, imax = 0, size = 0;
 526         unsigned int tmpmax = 0;
 527
 528         /* read each line from stdin and add it to the item list */
 529         for (i = 0; fgets(buf, sizeof buf, stdin); i++) {
 530                 if (i + 1 >= size / sizeof *items)
 531                         if (!(items = realloc(items, (size += BUFSIZ))))
 532                                 die("cannot realloc %u bytes:", size);
 533                 if ((p = strchr(buf, '\n')))
 534                         *p = '\0';
 535                 if (!(items[i].text = strdup(buf)))
 536                         die("cannot strdup %u bytes:", strlen(buf) + 1);
 537                 items[i].out = 0;
 538                 drw_font_getexts(drw->fonts, buf, strlen(buf), &tmpmax, NULL);
 539                 if (tmpmax > inputw) {
 540                         inputw = tmpmax;
 541                         imax = i;
 542                 }
 543         }
 544         if (items)
 545                 items[i].text = NULL;
 546         inputw = items ? TEXTW(items[imax].text) : 0;
 547         lines = MIN(lines, i);
 548 }
 549
 550 static void
 551 run(void)
 552 {
 553         XEvent ev;
 554
 555         while (!XNextEvent(dpy, &ev)) {
 556                 if (XFilterEvent(&ev, win))
 557                         continue;
 558                 switch(ev.type) {
 559                 case DestroyNotify:
 560                         if (ev.xdestroywindow.window != win)
 561                                 break;
 562                         cleanup();
 563                         exit(1);
 564                 case Expose:
 565                         if (ev.xexpose.count == 0)
 566                                 drw_map(drw, win, 0, 0, mw, mh);
 567                         break;
 568                 case FocusIn:
 569                         /* regrab focus from parent window */
 570                         if (ev.xfocus.window != win)
 571                                 grabfocus();
 572                         break;
 573                 case KeyPress:
 574                         keypress(&ev.xkey);
 575                         break;
 576                 case SelectionNotify:
 577                         if (ev.xselection.property == utf8)
 578                                 paste();
 579                         break;
 580                 case VisibilityNotify:
 581                         if (ev.xvisibility.state != VisibilityUnobscured)
 582                                 XRaiseWindow(dpy, win);
 583                         break;
 584                 }
 585         }
 586 }
 587
 588 static void
 589 setup(void)
 590 {
 591         int x, y, i, j;
 592         unsigned int du;
 593         XSetWindowAttributes swa;
 594         XIM xim;
 595         Window w, dw, *dws;
 596         XWindowAttributes wa;
 597         XClassHint ch = {"dmenu", "dmenu"};
 598 #ifdef XINERAMA
 599         XineramaScreenInfo *info;
 600         Window pw;
 601         int a, di, n, area = 0;
 602 #endif
 603         /* init appearance */
 604         for (j = 0; j < SchemeLast; j++)
 605                 scheme[j] = drw_scm_create(drw, colors[j], 2);
 606
 607         clip = XInternAtom(dpy, "CLIPBOARD",   False);
 608         utf8 = XInternAtom(dpy, "UTF8_STRING", False);
 609
 610         /* calculate menu geometry */
 611         bh = drw->fonts->h + 2;
 612         lines = MAX(lines, 0);
 613         mh = (lines + 1) * bh;
 614 #ifdef XINERAMA
 615         i = 0;
 616         if (parentwin == root && (info = XineramaQueryScreens(dpy, &n))) {
 617                 XGetInputFocus(dpy, &w, &di);
 618                 if (mon >= 0 && mon < n)
 619                         i = mon;
 620                 else if (w != root && w != PointerRoot && w != None) {
 621                         /* find top-level window containing current input focus */
 622                         do {
 623                                 if (XQueryTree(dpy, (pw = w), &dw, &w, &dws, &du) && dws)
 624                                         XFree(dws);
 625                         } while (w != root && w != pw);
 626                         /* find xinerama screen with which the window intersects most */
 627                         if (XGetWindowAttributes(dpy, pw, &wa))
 628                                 for (j = 0; j < n; j++)
 629                                         if ((a = INTERSECT(wa.x, wa.y, wa.width, wa.height, info[j])) > area) {
 630                                                 area = a;
 631                                                 i = j;
 632                                         }
 633                 }
 634                 /* no focused window is on screen, so use pointer location instead */
 635                 if (mon < 0 && !area && XQueryPointer(dpy, root, &dw, &dw, &x, &y, &di, &di, &du))
 636                         for (i = 0; i < n; i++)
 637                                 if (INTERSECT(x, y, 1, 1, info[i]))
 638                                         break;
 639
 640                 x = info[i].x_org;
 641                 y = info[i].y_org + (topbar ? 0 : info[i].height - mh);
 642                 mw = info[i].width;
 643                 XFree(info);
 644         } else
 645 #endif
 646         {
 647                 if (!XGetWindowAttributes(dpy, parentwin, &wa))
 648                         die("could not get embedding window attributes: 0x%lx",
 649                             parentwin);
 650                 x = 0;
 651                 y = topbar ? 0 : wa.height - mh;
 652                 mw = wa.width;
 653         }
 654         promptw = (prompt && *prompt) ? TEXTW(prompt) - lrpad / 4 : 0;
 655         inputw = MIN(inputw, mw/3);
 656         match();
 657
 658         /* create menu window */
 659         swa.override_redirect = True;
 660         swa.background_pixel = scheme[SchemeNorm][ColBg].pixel;
 661         swa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
 662         win = XCreateWindow(dpy, parentwin, x, y, mw, mh, 0,
 663                             CopyFromParent, CopyFromParent, CopyFromParent,
 664                             CWOverrideRedirect | CWBackPixel | CWEventMask, &swa);
 665         XSetClassHint(dpy, win, &ch);
 666
 667
 668         /* input methods */
 669         if ((xim = XOpenIM(dpy, NULL, NULL, NULL)) == NULL)
 670                 die("XOpenIM failed: could not open input device");
 671
 672         xic = XCreateIC(xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
 673                         XNClientWindow, win, XNFocusWindow, win, NULL);
 674
 675         XMapRaised(dpy, win);
 676         if (embed) {
 677                 XSelectInput(dpy, parentwin, FocusChangeMask | SubstructureNotifyMask);
 678                 if (XQueryTree(dpy, parentwin, &dw, &w, &dws, &du) && dws) {
 679                         for (i = 0; i < du && dws[i] != win; ++i)
 680                                 XSelectInput(dpy, dws[i], FocusChangeMask);
 681                         XFree(dws);
 682                 }
 683                 grabfocus();
 684         }
 685         drw_resize(drw, mw, mh);
 686         drawmenu();
 687 }
 688
 689 static void
 690 usage(void)
 691 {
 692         fputs("usage: dmenu [-bfiv] [-l lines] [-p prompt] [-fn font] [-m monitor]\n"
 693               "             [-nb color] [-nf color] [-sb color] [-sf color] [-w windowid]\n", stderr);
 694         exit(1);
 695 }
 696
 697 int
 698 main(int argc, char *argv[])
 699 {
 700         XWindowAttributes wa;
 701         int i, fast = 0;
 702
 703         for (i = 1; i < argc; i++)
 704                 /* these options take no arguments */
 705                 if (!strcmp(argv[i], "-v")) {      /* prints version information */
 706                         puts("dmenu-"VERSION);
 707                         exit(0);
 708                 } else if (!strcmp(argv[i], "-b")) /* appears at the bottom of the screen */
 709                         topbar = 0;
 710                 else if (!strcmp(argv[i], "-f"))   /* grabs keyboard before reading stdin */
 711                         fast = 1;
 712                 else if (!strcmp(argv[i], "-i")) { /* case-insensitive item matching */
 713                         fstrncmp = strncasecmp;
 714                         fstrstr = strcasestr;
 715                 } else if (i + 1 == argc)
 716                         usage();
 717                 /* these options take one argument */
 718                 else if (!strcmp(argv[i], "-l"))   /* number of lines in vertical list */
 719                         lines = atoi(argv[++i]);
 720                 else if (!strcmp(argv[i], "-m"))
 721                         mon = atoi(argv[++i]);
 722                 else if (!strcmp(argv[i], "-p"))   /* adds prompt to left of input field */
 723                         prompt = argv[++i];
 724                 else if (!strcmp(argv[i], "-fn"))  /* font or font set */
 725                         fonts[0] = argv[++i];
 726                 else if (!strcmp(argv[i], "-nb"))  /* normal background color */
 727                         colors[SchemeNorm][ColBg] = argv[++i];
 728                 else if (!strcmp(argv[i], "-nf"))  /* normal foreground color */
 729                         colors[SchemeNorm][ColFg] = argv[++i];
 730                 else if (!strcmp(argv[i], "-sb"))  /* selected background color */
 731                         colors[SchemeSel][ColBg] = argv[++i];
 732                 else if (!strcmp(argv[i], "-sf"))  /* selected foreground color */
 733                         colors[SchemeSel][ColFg] = argv[++i];
 734                 else if (!strcmp(argv[i], "-w"))   /* embedding window id */
 735                         embed = argv[++i];
 736                 else
 737                         usage();
 738
 739         if (!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 740                 fputs("warning: no locale support\n", stderr);
 741         if (!(dpy = XOpenDisplay(NULL)))
 742                 die("cannot open display");
 743         screen = DefaultScreen(dpy);
 744         root = RootWindow(dpy, screen);
 745         if (!embed || !(parentwin = strtol(embed, NULL, 0)))
 746                 parentwin = root;
 747         if (!XGetWindowAttributes(dpy, parentwin, &wa))
 748                 die("could not get embedding window attributes: 0x%lx",
 749                     parentwin);
 750         drw = drw_create(dpy, screen, root, wa.width, wa.height);
 751         if (!drw_fontset_create(drw, fonts, LENGTH(fonts)))
 752                 die("no fonts could be loaded.");
 753         lrpad = drw->fonts->h;
 754
 755 #ifdef __OpenBSD__
 756         if (pledge("stdio rpath", NULL) == -1)
 757                 die("pledge");
 758 #endif
 759
 760         if (fast && !isatty(0)) {
 761                 grabkeyboard();
 762                 readstdin();
 763         } else {
 764                 readstdin();
 765                 grabkeyboard();
 766         }
 767         setup();
 768         run();
 769
 770         return 1; /* unreachable */
 771 }