dmenu.c

   1 /* See LICENSE file for copyright and license details. */
   2 #define _BSD_SOURCE
   3 #include <ctype.h>
   4 #include <stdarg.h>
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <strings.h>
   9 #include <unistd.h>
  10 #include <X11/keysym.h>
  11 #include <X11/Xlib.h>
  12 #include <X11/Xutil.h>
  13 #ifdef XINERAMA
  14 #include <X11/extensions/Xinerama.h>
  15 #endif
  16
  17 /* macros */
  18 #define CLEANMASK(mask)         (mask & ~(numlockmask | LockMask))
  19 #define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
  20
  21 /* enums */
  22 enum { ColFG, ColBG, ColLast };
  23
  24 /* typedefs */
  25 typedef struct {
  26         int x, y, w, h;
  27         unsigned long norm[ColLast];
  28         unsigned long sel[ColLast];
  29         Drawable drawable;
  30         GC gc;
  31         struct {
  32                 XFontStruct *xfont;
  33                 XFontSet set;
  34                 int ascent;
  35                 int descent;
  36                 int height;
  37         } font;
  38 } DC; /* draw context */
  39
  40 typedef struct Item Item;
  41 struct Item {
  42         char *text;
  43         Item *next;             /* traverses all items */
  44         Item *left, *right;     /* traverses items matching current search pattern */
  45 };
  46
  47 /* forward declarations */
  48 static void appenditem(Item *i, Item **list, Item **last);
  49 static void calcoffsets(void);
  50 static char *cistrstr(const char *s, const char *sub);
  51 static void cleanup(void);
  52 static void drawmenu(void);
  53 static void drawtext(const char *text, unsigned long col[ColLast]);
  54 static void eprint(const char *errstr, ...);
  55 static unsigned long getcolor(const char *colstr);
  56 static Bool grabkeyboard(void);
  57 static void initfont(const char *fontstr);
  58 static void kpress(XKeyEvent * e);
  59 static void match(char *pattern);
  60 static void readstdin(void);
  61 static void run(void);
  62 static void setup(Bool topbar);
  63 static int textnw(const char *text, unsigned int len);
  64 static int textw(const char *text);
  65
  66 #include "config.h"
  67
  68 /* variables */
  69 static char *maxname = NULL;
  70 static char *prompt = NULL;
  71 static char text[4096];
  72 static int cmdw = 0;
  73 static int promptw = 0;
  74 static int ret = 0;
  75 static int screen;
  76 static unsigned int mw, mh;
  77 static unsigned int numlockmask = 0;
  78 static Bool running = True;
  79 static Display *dpy;
  80 static DC dc = {0};
  81 static Item *allitems = NULL;   /* first of all items */
  82 static Item *item = NULL;       /* first of pattern matching items */
  83 static Item *sel = NULL;
  84 static Item *next = NULL;
  85 static Item *prev = NULL;
  86 static Item *curr = NULL;
  87 static Window root, win;
  88 static int (*fstrncmp)(const char *, const char *, size_t n) = strncmp;
  89 static char *(*fstrstr)(const char *, const char *) = strstr;
  90
  91 void
  92 appenditem(Item *i, Item **list, Item **last) {
  93         if(!(*last))
  94                 *list = i;
  95         else
  96                 (*last)->right = i;
  97         i->left = *last;
  98         i->right = NULL;
  99         *last = i;
 100 }
 101
 102 void
 103 calcoffsets(void) {
 104         int tw;
 105         unsigned int w;
 106
 107         if(!curr)
 108                 return;
 109         w = promptw + cmdw + 2 * spaceitem;
 110         for(next = curr; next; next=next->right) {
 111                 tw = textw(next->text);
 112                 if(tw > mw / 3)
 113                         tw = mw / 3;
 114                 w += tw;
 115                 if(w > mw)
 116                         break;
 117         }
 118         w = promptw + cmdw + 2 * spaceitem;
 119         for(prev = curr; prev && prev->left; prev=prev->left) {
 120                 tw = textw(prev->left->text);
 121                 if(tw > mw / 3)
 122                         tw = mw / 3;
 123                 w += tw;
 124                 if(w > mw)
 125                         break;
 126         }
 127 }
 128
 129 char *
 130 cistrstr(const char *s, const char *sub) {
 131         int c, csub;
 132         unsigned int len;
 133
 134         if(!sub)
 135                 return (char *)s;
 136         if((c = *sub++) != 0) {
 137                 c = tolower(c);
 138                 len = strlen(sub);
 139                 do {
 140                         do {
 141                                 if((csub = *s++) == 0)
 142                                         return (NULL);
 143                         }
 144                         while(tolower(csub) != c);
 145                 }
 146                 while(strncasecmp(s, sub, len) != 0);
 147                 s--;
 148         }
 149         return (char *)s;
 150 }
 151
 152 void
 153 cleanup(void) {
 154         Item *itm;
 155
 156         while(allitems) {
 157                 itm = allitems->next;
 158                 free(allitems->text);
 159                 free(allitems);
 160                 allitems = itm;
 161         }
 162         if(dc.font.set)
 163                 XFreeFontSet(dpy, dc.font.set);
 164         else
 165                 XFreeFont(dpy, dc.font.xfont);
 166         XFreePixmap(dpy, dc.drawable);
 167         XFreeGC(dpy, dc.gc);
 168         XDestroyWindow(dpy, win);
 169         XUngrabKeyboard(dpy, CurrentTime);
 170 }
 171
 172 void
 173 drawmenu(void) {
 174         Item *i;
 175
 176         dc.x = 0;
 177         dc.y = 0;
 178         dc.w = mw;
 179         dc.h = mh;
 180         drawtext(NULL, dc.norm);
 181         /* print prompt? */
 182         if(promptw) {
 183                 dc.w = promptw;
 184                 drawtext(prompt, dc.sel);
 185         }
 186         dc.x += promptw;
 187         dc.w = mw - promptw;
 188         /* print command */
 189         if(cmdw && item)
 190                 dc.w = cmdw;
 191         drawtext(text[0] ? text : NULL, dc.norm);
 192         dc.x += cmdw;
 193         if(curr) {
 194                 dc.w = spaceitem;
 195                 drawtext((curr && curr->left) ? "<" : NULL, dc.norm);
 196                 dc.x += dc.w;
 197                 /* determine maximum items */
 198                 for(i = curr; i != next; i=i->right) {
 199                         dc.w = textw(i->text);
 200                         if(dc.w > mw / 3)
 201                                 dc.w = mw / 3;
 202                         drawtext(i->text, (sel == i) ? dc.sel : dc.norm);
 203                         dc.x += dc.w;
 204                 }
 205                 dc.x = mw - spaceitem;
 206                 dc.w = spaceitem;
 207                 drawtext(next ? ">" : NULL, dc.norm);
 208         }
 209         XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
 210         XFlush(dpy);
 211 }
 212
 213 void
 214 drawtext(const char *text, unsigned long col[ColLast]) {
 215         int x, y, w, h;
 216         static char buf[256];
 217         unsigned int len, olen;
 218         XRectangle r = { dc.x, dc.y, dc.w, dc.h };
 219
 220         XSetForeground(dpy, dc.gc, col[ColBG]);
 221         XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
 222         if(!text)
 223                 return;
 224         w = 0;
 225         olen = len = strlen(text);
 226         if(len >= sizeof buf)
 227                 len = sizeof buf - 1;
 228         memcpy(buf, text, len);
 229         buf[len] = 0;
 230         h = dc.font.ascent + dc.font.descent;
 231         y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
 232         x = dc.x + (h / 2);
 233         /* shorten text if necessary */
 234         while(len && (w = textnw(buf, len)) > dc.w - h)
 235                 buf[--len] = 0;
 236         if(len < olen) {
 237                 if(len > 1)
 238                         buf[len - 1] = '.';
 239                 if(len > 2)
 240                         buf[len - 2] = '.';
 241                 if(len > 3)
 242                         buf[len - 3] = '.';
 243         }
 244         if(w > dc.w)
 245                 return; /* too long */
 246         XSetForeground(dpy, dc.gc, col[ColFG]);
 247         if(dc.font.set)
 248                 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
 249         else
 250                 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
 251 }
 252
 253 void
 254 eprint(const char *errstr, ...) {
 255         va_list ap;
 256
 257         va_start(ap, errstr);
 258         vfprintf(stderr, errstr, ap);
 259         va_end(ap);
 260         exit(EXIT_FAILURE);
 261 }
 262
 263 unsigned long
 264 getcolor(const char *colstr) {
 265         Colormap cmap = DefaultColormap(dpy, screen);
 266         XColor color;
 267
 268         if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
 269                 eprint("error, cannot allocate color '%s'\n", colstr);
 270         return color.pixel;
 271 }
 272
 273 Bool
 274 grabkeyboard(void) {
 275         unsigned int len;
 276
 277         for(len = 1000; len; len--) {
 278                 if(XGrabKeyboard(dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime)
 279                 == GrabSuccess)
 280                         break;
 281                 usleep(1000);
 282         }
 283         return len > 0;
 284 }
 285
 286 void
 287 initfont(const char *fontstr) {
 288         char *def, **missing;
 289         int i, n;
 290
 291         if(!fontstr || fontstr[0] == '\0')
 292                 eprint("error, cannot load font: '%s'\n", fontstr);
 293         missing = NULL;
 294         if(dc.font.set)
 295                 XFreeFontSet(dpy, dc.font.set);
 296         dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
 297         if(missing)
 298                 XFreeStringList(missing);
 299         if(dc.font.set) {
 300                 XFontSetExtents *font_extents;
 301                 XFontStruct **xfonts;
 302                 char **font_names;
 303                 dc.font.ascent = dc.font.descent = 0;
 304                 font_extents = XExtentsOfFontSet(dc.font.set);
 305                 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
 306                 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
 307                         if(dc.font.ascent < (*xfonts)->ascent)
 308                                 dc.font.ascent = (*xfonts)->ascent;
 309                         if(dc.font.descent < (*xfonts)->descent)
 310                                 dc.font.descent = (*xfonts)->descent;
 311                         xfonts++;
 312                 }
 313         }
 314         else {
 315                 if(dc.font.xfont)
 316                         XFreeFont(dpy, dc.font.xfont);
 317                 dc.font.xfont = NULL;
 318                 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
 319                 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
 320                         eprint("error, cannot load font: '%s'\n", fontstr);
 321                 dc.font.ascent = dc.font.xfont->ascent;
 322                 dc.font.descent = dc.font.xfont->descent;
 323         }
 324         dc.font.height = dc.font.ascent + dc.font.descent;
 325 }
 326
 327 void
 328 kpress(XKeyEvent * e) {
 329         char buf[32];
 330         int i, num;
 331         unsigned int len;
 332         KeySym ksym;
 333
 334         len = strlen(text);
 335         buf[0] = 0;
 336         num = XLookupString(e, buf, sizeof buf, &ksym, 0);
 337         if(IsKeypadKey(ksym)) {
 338                 if(ksym == XK_KP_Enter)
 339                         ksym = XK_Return;
 340                 else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
 341                         ksym = (ksym - XK_KP_0) + XK_0;
 342         }
 343         if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
 344            || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
 345            || IsPrivateKeypadKey(ksym))
 346                 return;
 347         /* first check if a control mask is omitted */
 348         if(e->state & ControlMask) {
 349                 switch (ksym) {
 350                 default:        /* ignore other control sequences */
 351                         return;
 352                 case XK_bracketleft:
 353                         ksym = XK_Escape;
 354                         break;
 355                 case XK_h:
 356                 case XK_H:
 357                         ksym = XK_BackSpace;
 358                         break;
 359                 case XK_i:
 360                 case XK_I:
 361                         ksym = XK_Tab;
 362                         break;
 363                 case XK_j:
 364                 case XK_J:
 365                         ksym = XK_Return;
 366                         break;
 367                 case XK_u:
 368                 case XK_U:
 369                         text[0] = 0;
 370                         match(text);
 371                         drawmenu();
 372                         return;
 373                 case XK_w:
 374                 case XK_W:
 375                         if(len) {
 376                                 i = len - 1;
 377                                 while(i >= 0 && text[i] == ' ')
 378                                         text[i--] = 0;
 379                                 while(i >= 0 && text[i] != ' ')
 380                                         text[i--] = 0;
 381                                 match(text);
 382                                 drawmenu();
 383                         }
 384                         return;
 385                 }
 386         }
 387         if(CLEANMASK(e->state) & Mod1Mask) {
 388                 switch(ksym) {
 389                 default: return;
 390                 case XK_h:
 391                         ksym = XK_Left;
 392                         break;
 393                 case XK_l:
 394                         ksym = XK_Right;
 395                         break;
 396                 case XK_j:
 397                         ksym = XK_Next;
 398                         break;
 399                 case XK_k:
 400                         ksym = XK_Prior;
 401                         break;
 402                 case XK_g:
 403                         ksym = XK_Home;
 404                         break;
 405                 case XK_G:
 406                         ksym = XK_End;
 407                         break;
 408                 }
 409         }
 410         switch(ksym) {
 411         default:
 412                 if(num && !iscntrl((int) buf[0])) {
 413                         buf[num] = 0;
 414                         if(len > 0)
 415                                 strncat(text, buf, sizeof text);
 416                         else
 417                                 strncpy(text, buf, sizeof text);
 418                         match(text);
 419                 }
 420                 break;
 421         case XK_BackSpace:
 422                 if(len) {
 423                         text[--len] = 0;
 424                         match(text);
 425                 }
 426                 break;
 427         case XK_End:
 428                 if(!item)
 429                         return;
 430                 while(next) {
 431                         sel = curr = next;
 432                         calcoffsets();
 433                 }
 434                 while(sel && sel->right)
 435                         sel = sel->right;
 436                 break;
 437         case XK_Escape:
 438                 ret = 1;
 439                 running = False;
 440                 break;
 441         case XK_Home:
 442                 if(!item)
 443                         return;
 444                 sel = curr = item;
 445                 calcoffsets();
 446                 break;
 447         case XK_Left:
 448                 if(!(sel && sel->left))
 449                         return;
 450                 sel=sel->left;
 451                 if(sel->right == curr) {
 452                         curr = prev;
 453                         calcoffsets();
 454                 }
 455                 break;
 456         case XK_Next:
 457                 if(!next)
 458                         return;
 459                 sel = curr = next;
 460                 calcoffsets();
 461                 break;
 462         case XK_Prior:
 463                 if(!prev)
 464                         return;
 465                 sel = curr = prev;
 466                 calcoffsets();
 467                 break;
 468         case XK_Return:
 469                 if((e->state & ShiftMask) && *text)
 470                         fprintf(stdout, "%s", text);
 471                 else if(sel)
 472                         fprintf(stdout, "%s", sel->text);
 473                 else if(*text)
 474                         fprintf(stdout, "%s", text);
 475                 fflush(stdout);
 476                 running = False;
 477                 break;
 478         case XK_Right:
 479                 if(!(sel && sel->right))
 480                         return;
 481                 sel=sel->right;
 482                 if(sel == next) {
 483                         curr = next;
 484                         calcoffsets();
 485                 }
 486                 break;
 487         case XK_Tab:
 488                 if(!sel)
 489                         return;
 490                 strncpy(text, sel->text, sizeof text);
 491                 match(text);
 492                 break;
 493         }
 494         drawmenu();
 495 }
 496
 497 void
 498 match(char *pattern) {
 499         unsigned int plen;
 500         Item *i, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
 501
 502         if(!pattern)
 503                 return;
 504         plen = strlen(pattern);
 505         item = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
 506         for(i = allitems; i; i = i->next)
 507                 if(!fstrncmp(pattern, i->text, plen + 1))
 508                         appenditem(i, &lexact, &exactend);
 509                 else if(!fstrncmp(pattern, i->text, plen))
 510                         appenditem(i, &lprefix, &prefixend);
 511                 else if(fstrstr(i->text, pattern))
 512                         appenditem(i, &lsubstr, &substrend);
 513         if(lexact) {
 514                 item = lexact;
 515                 itemend = exactend;
 516         }
 517         if(lprefix) {
 518                 if(itemend) {
 519                         itemend->right = lprefix;
 520                         lprefix->left = itemend;
 521                 }
 522                 else
 523                         item = lprefix;
 524                 itemend = prefixend;
 525         }
 526         if(lsubstr) {
 527                 if(itemend) {
 528                         itemend->right = lsubstr;
 529                         lsubstr->left = itemend;
 530                 }
 531                 else
 532                         item = lsubstr;
 533         }
 534         curr = prev = next = sel = item;
 535         calcoffsets();
 536 }
 537
 538 void
 539 readstdin(void) {
 540         char *p, buf[1024];
 541         unsigned int len = 0, max = 0;
 542         Item *i, *new;
 543
 544         i = 0;
 545         while(fgets(buf, sizeof buf, stdin)) {
 546                 len = strlen(buf);
 547                 if (buf[len - 1] == '\n')
 548                         buf[len - 1] = 0;
 549                 if(!(p = strdup(buf)))
 550                         eprint("fatal: could not strdup() %u bytes\n", strlen(buf));
 551                 if(max < len) {
 552                         maxname = p;
 553                         max = len;
 554                 }
 555                 if((new = (Item *)malloc(sizeof(Item))) == NULL)
 556                         eprint("fatal: could not malloc() %u bytes\n", sizeof(Item));
 557                 new->next = new->left = new->right = NULL;
 558                 new->text = p;
 559                 if(!i)
 560                         allitems = new;
 561                 else
 562                         i->next = new;
 563                 i = new;
 564         }
 565 }
 566
 567 void
 568 run(void) {
 569         XEvent ev;
 570
 571         /* main event loop */
 572         while(running && !XNextEvent(dpy, &ev))
 573                 switch (ev.type) {
 574                 default:        /* ignore all crap */
 575                         break;
 576                 case KeyPress:
 577                         kpress(&ev.xkey);
 578                         break;
 579                 case Expose:
 580                         if(ev.xexpose.count == 0)
 581                                 drawmenu();
 582                         break;
 583                 }
 584 }
 585
 586 void
 587 setup(Bool topbar) {
 588         int i, j, x, y;
 589 #if XINERAMA
 590         int n;
 591         XineramaScreenInfo *info = NULL;
 592 #endif
 593         XModifierKeymap *modmap;
 594         XSetWindowAttributes wa;
 595
 596         /* init modifier map */
 597         modmap = XGetModifierMapping(dpy);
 598         for(i = 0; i < 8; i++)
 599                 for(j = 0; j < modmap->max_keypermod; j++) {
 600                         if(modmap->modifiermap[i * modmap->max_keypermod + j]
 601                         == XKeysymToKeycode(dpy, XK_Num_Lock))
 602                                 numlockmask = (1 << i);
 603                 }
 604         XFreeModifiermap(modmap);
 605
 606         /* style */
 607         dc.norm[ColBG] = getcolor(normbgcolor);
 608         dc.norm[ColFG] = getcolor(normfgcolor);
 609         dc.sel[ColBG] = getcolor(selbgcolor);
 610         dc.sel[ColFG] = getcolor(selfgcolor);
 611         initfont(font);
 612
 613         /* menu window */
 614         wa.override_redirect = 1;
 615         wa.background_pixmap = ParentRelative;
 616         wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask;
 617
 618         /* menu window geometry */
 619         mh = dc.font.height + 2;
 620 #if XINERAMA
 621         if(XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
 622                 i = 0;
 623                 if(n > 1) {
 624                         int di;
 625                         unsigned int dui;
 626                         Window dummy;
 627                         if(XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui))
 628                                 for(i = 0; i < n; i++)
 629                                         if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
 630                                                 break;
 631                 }
 632                 x = info[i].x_org;
 633                 y = topbar ? info[i].y_org : info[i].y_org + info[i].height - mh;
 634                 mw = info[i].width;
 635                 XFree(info);
 636         }
 637         else
 638 #endif
 639         {
 640                 x = 0;
 641                 y = topbar ? 0 : DisplayHeight(dpy, screen) - mh;
 642                 mw = DisplayWidth(dpy, screen);
 643         }
 644
 645         win = XCreateWindow(dpy, root, x, y, mw, mh, 0,
 646                         DefaultDepth(dpy, screen), CopyFromParent,
 647                         DefaultVisual(dpy, screen),
 648                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 649
 650         /* pixmap */
 651         dc.drawable = XCreatePixmap(dpy, root, mw, mh, DefaultDepth(dpy, screen));
 652         dc.gc = XCreateGC(dpy, root, 0, 0);
 653         XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
 654         if(!dc.font.set)
 655                 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
 656         if(maxname)
 657                 cmdw = textw(maxname);
 658         if(cmdw > mw / 3)
 659                 cmdw = mw / 3;
 660         if(prompt)
 661                 promptw = textw(prompt);
 662         if(promptw > mw / 5)
 663                 promptw = mw / 5;
 664         text[0] = 0;
 665         match(text);
 666         XMapRaised(dpy, win);
 667 }
 668
 669 int
 670 textnw(const char *text, unsigned int len) {
 671         XRectangle r;
 672
 673         if(dc.font.set) {
 674                 XmbTextExtents(dc.font.set, text, len, NULL, &r);
 675                 return r.width;
 676         }
 677         return XTextWidth(dc.font.xfont, text, len);
 678 }
 679
 680 int
 681 textw(const char *text) {
 682         return textnw(text, strlen(text)) + dc.font.height;
 683 }
 684
 685 int
 686 main(int argc, char *argv[]) {
 687         unsigned int i;
 688         Bool topbar = True;
 689
 690         /* command line args */
 691         for(i = 1; i < argc; i++)
 692                 if(!strcmp(argv[i], "-i")) {
 693                         fstrncmp = strncasecmp;
 694                         fstrstr = cistrstr;
 695                 }
 696                 else if(!strcmp(argv[i], "-b"))
 697                         topbar = False;
 698                 else if(!strcmp(argv[i], "-fn")) {
 699                         if(++i < argc) font = argv[i];
 700                 }
 701                 else if(!strcmp(argv[i], "-nb")) {
 702                         if(++i < argc) normbgcolor = argv[i];
 703                 }
 704                 else if(!strcmp(argv[i], "-nf")) {
 705                         if(++i < argc) normfgcolor = argv[i];
 706                 }
 707                 else if(!strcmp(argv[i], "-p")) {
 708                         if(++i < argc) prompt = argv[i];
 709                 }
 710                 else if(!strcmp(argv[i], "-sb")) {
 711                         if(++i < argc) selbgcolor = argv[i];
 712                 }
 713                 else if(!strcmp(argv[i], "-sf")) {
 714                         if(++i < argc) selfgcolor = argv[i];
 715                 }
 716                 else if(!strcmp(argv[i], "-v"))
 717                         eprint("dmenu-"VERSION", © 2006-2008 dmenu engineers, see LICENSE for details\n");
 718                 else
 719                         eprint("usage: dmenu [-i] [-b] [-fn <font>] [-nb <color>] [-nf <color>]\n"
 720                                "             [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n");
 721         if(!XSupportsLocale())
 722                 fprintf(stderr, "warning: no locale support\n");
 723         if(!(dpy = XOpenDisplay(0)))
 724                 eprint("dmenu: cannot open display\n");
 725         screen = DefaultScreen(dpy);
 726         root = RootWindow(dpy, screen);
 727
 728         if(isatty(STDIN_FILENO)) {
 729                 readstdin();
 730                 running = grabkeyboard();
 731         }
 732         else { /* prevent keypress loss */
 733                 running = grabkeyboard();
 734                 readstdin();
 735         }
 736
 737         setup(topbar);
 738         drawmenu();
 739         XSync(dpy, False);
 740         run();
 741         cleanup();
 742         XCloseDisplay(dpy);
 743         return ret;
 744 }