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 <unistd.h>
   8 #include <X11/keysym.h>
   9 #include <X11/Xlib.h>
  10 #include <X11/Xutil.h>
  11 #ifdef XINERAMA
  12 #include <X11/extensions/Xinerama.h>
  13 #endif
  14 #include <draw.h>
  15
  16 /* macros */
  17 #define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
  18 #define MIN(a, b)               ((a) < (b) ? (a) : (b))
  19 #define MAX(a, b)               ((a) > (b) ? (a) : (b))
  20 #define IS_UTF8_1ST_CHAR(c)     ((((c) & 0xc0) == 0xc0) || !((c) & 0x80))
  21
  22 typedef struct Item Item;
  23 struct Item {
  24         char *text;
  25         Item *next;         /* traverses all items */
  26         Item *left, *right; /* traverses items matching current search pattern */
  27 };
  28
  29 /* forward declarations */
  30 static void appenditem(Item *i, Item **list, Item **last);
  31 static void calcoffsetsh(void);
  32 static void calcoffsetsv(void);
  33 static char *cistrstr(const char *s, const char *sub);
  34 static void cleanup(void);
  35 static void dinput(void);
  36 static void drawmenu(void);
  37 static void drawmenuh(void);
  38 static void drawmenuv(void);
  39 static void grabkeyboard(void);
  40 static void kpress(XKeyEvent *e);
  41 static void match(char *pattern);
  42 static void readstdin(void);
  43 static void run(void);
  44 static void setup(void);
  45
  46 #include "config.h"
  47
  48 /* variables */
  49 static char **argp = NULL;
  50 static char *maxname = NULL;
  51 static char *prompt = NULL;
  52 static char text[4096];
  53 static int cmdw = 0;
  54 static int promptw = 0;
  55 static int screen;
  56 static unsigned int lines = 0;
  57 static unsigned int numlockmask = 0;
  58 static unsigned int mw, mh;
  59 static unsigned long normcol[ColLast];
  60 static unsigned long selcol[ColLast];
  61 static Bool topbar = True;
  62 static DC dc;
  63 static Display *dpy;
  64 static Item *allitems = NULL;  /* first of all items */
  65 static Item *item = NULL;      /* first of pattern matching items */
  66 static Item *sel = NULL;
  67 static Item *next = NULL;
  68 static Item *prev = NULL;
  69 static Item *curr = NULL;
  70 static Window win, root;
  71 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
  72 static char *(*fstrstr)(const char *, const char *) = strstr;
  73 static void (*calcoffsets)(void) = calcoffsetsh;
  74
  75 void
  76 appenditem(Item *i, Item **list, Item **last) {
  77         if(!(*last))
  78                 *list = i;
  79         else
  80                 (*last)->right = i;
  81         i->left = *last;
  82         i->right = NULL;
  83         *last = i;
  84 }
  85
  86 void
  87 calcoffsetsh(void) {
  88         unsigned int x;
  89
  90         x = promptw + cmdw + (2 * spaceitem);
  91         for(next = curr; next; next = next->right)
  92                 if((x += MIN(textw(&dc, next->text), mw / 3)) > mw)
  93                         break;
  94         x = promptw + cmdw + (2 * spaceitem);
  95         for(prev = curr; prev && prev->left; prev = prev->left)
  96                 if((x += MIN(textw(&dc, prev->left->text), mw / 3)) > mw)
  97                         break;
  98 }
  99
 100 void
 101 calcoffsetsv(void) {
 102         unsigned int i;
 103
 104         next = prev = curr;
 105         for(i = 0; i < lines && next; i++)
 106                 next = next->right;
 107         mh = (dc.font.height + 2) * (i + 1);
 108         for(i = 0; i < lines && prev && prev->left; i++)
 109                 prev = prev->left;
 110 }
 111
 112 char *
 113 cistrstr(const char *s, const char *sub) {
 114         int c, csub;
 115         unsigned int len;
 116
 117         if(!sub)
 118                 return (char *)s;
 119         if((c = tolower(*sub++)) != '\0') {
 120                 len = strlen(sub);
 121                 do {
 122                         do {
 123                                 if((csub = *s++) == '\0')
 124                                         return NULL;
 125                         }
 126                         while(tolower(csub) != c);
 127                 }
 128                 while(strncasecmp(s, sub, len) != 0);
 129                 s--;
 130         }
 131         return (char *)s;
 132 }
 133
 134 void
 135 cleanup(void) {
 136         Item *itm;
 137
 138         while(allitems) {
 139                 itm = allitems->next;
 140                 free(allitems->text);
 141                 free(allitems);
 142                 allitems = itm;
 143         }
 144         cleanupdraw(&dc);
 145         XDestroyWindow(dpy, win);
 146         XUngrabKeyboard(dpy, CurrentTime);
 147         XCloseDisplay(dpy);
 148 }
 149
 150 void
 151 dinput(void) {
 152         cleanup();
 153         argp[0] = "dinput";
 154         argp[1] = text;
 155         execvp("dinput", argp);
 156         eprint("cannot exec dinput\n");
 157 }
 158
 159 void
 160 drawmenu(void) {
 161         dc.x = 0;
 162         dc.y = 0;
 163         dc.w = mw;
 164         dc.h = mh;
 165         drawtext(&dc, NULL, normcol);
 166         dc.h = dc.font.height + 2;
 167         dc.y = topbar ? 0 : mh - dc.h;
 168         /* print prompt? */
 169         if(prompt) {
 170                 dc.w = promptw;
 171                 drawtext(&dc, prompt, selcol);
 172                 dc.x += dc.w;
 173         }
 174         dc.w = mw - dc.x;
 175         /* print command */
 176         if(cmdw && item && lines == 0)
 177                 dc.w = cmdw;
 178         drawtext(&dc, text, normcol);
 179         if(lines > 0)
 180                 drawmenuv();
 181         else if(curr)
 182                 drawmenuh();
 183         commitdraw(&dc, win);
 184 }
 185
 186 void
 187 drawmenuh(void) {
 188         Item *i;
 189
 190         dc.x += cmdw;
 191         dc.w = spaceitem;
 192         drawtext(&dc, curr->left ? "<" : NULL, normcol);
 193         dc.x += dc.w;
 194         for(i = curr; i != next; i = i->right) {
 195                 dc.w = MIN(textw(&dc, i->text), mw / 3);
 196                 drawtext(&dc, i->text, (sel == i) ? selcol : normcol);
 197                 dc.x += dc.w;
 198         }
 199         dc.w = spaceitem;
 200         dc.x = mw - dc.w;
 201         drawtext(&dc, next ? ">" : NULL, normcol);
 202 }
 203
 204 void
 205 drawmenuv(void) {
 206         Item *i;
 207         XWindowAttributes wa;
 208
 209         dc.y = topbar ? dc.h : 0;
 210         dc.w = mw - dc.x;
 211         for(i = curr; i != next; i = i->right) {
 212                 drawtext(&dc, i->text, (sel == i) ? selcol : normcol);
 213                 dc.y += dc.h;
 214         }
 215         if(!XGetWindowAttributes(dpy, win, &wa))
 216                 eprint("cannot get window attributes");
 217         XMoveResizeWindow(dpy, win, wa.x, wa.y + (topbar ? 0 : wa.height - mh), mw, mh);
 218 }
 219
 220 void
 221 grabkeyboard(void) {
 222         unsigned int len;
 223
 224         for(len = 1000; len; len--) {
 225                 if(XGrabKeyboard(dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime)
 226                 == GrabSuccess)
 227                         return;
 228                 usleep(1000);
 229         }
 230         exit(EXIT_FAILURE);
 231 }
 232
 233 void
 234 kpress(XKeyEvent *e) {
 235         char buf[sizeof text];
 236         int num;
 237         unsigned int i, len;
 238         KeySym ksym;
 239
 240         len = strlen(text);
 241         num = XLookupString(e, buf, sizeof buf, &ksym, NULL);
 242         if(ksym == XK_KP_Enter)
 243                 ksym = XK_Return;
 244         else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
 245                 ksym = (ksym - XK_KP_0) + XK_0;
 246         else if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
 247         || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
 248         || IsPrivateKeypadKey(ksym))
 249                 return;
 250         /* first check if a control mask is omitted */
 251         if(e->state & ControlMask) {
 252                 switch(tolower(ksym)) {
 253                 default:
 254                         return;
 255                 case XK_a:
 256                         ksym = XK_Home;
 257                         break;
 258                 case XK_b:
 259                         ksym = XK_Left;
 260                         break;
 261                 case XK_c:
 262                         ksym = XK_Escape;
 263                         break;
 264                 case XK_e:
 265                         ksym = XK_End;
 266                         break;
 267                 case XK_f:
 268                         ksym = XK_Right;
 269                         break;
 270                 case XK_h:
 271                         ksym = XK_BackSpace;
 272                         break;
 273                 case XK_i:
 274                         ksym = XK_Tab;
 275                         break;
 276                 case XK_j:
 277                 case XK_m:
 278                         ksym = XK_Return;
 279                         break;
 280                 case XK_n:
 281                         ksym = XK_Down;
 282                         break;
 283                 case XK_p:
 284                         ksym = XK_Up;
 285                         break;
 286                 case XK_u:
 287                         text[0] = '\0';
 288                         match(text);
 289                         break;
 290                 case XK_w:
 291                         if(len == 0)
 292                                 return;
 293                         i = len;
 294                         while(i-- > 0 && text[i] == ' ');
 295                         while(i-- > 0 && text[i] != ' ');
 296                         text[++i] = '\0';
 297                         match(text);
 298                         break;
 299                 }
 300         }
 301         switch(ksym) {
 302         default:
 303                 num = MIN(num, sizeof text);
 304                 if(num && !iscntrl((int) buf[0])) {
 305                         memcpy(text + len, buf, num + 1);
 306                         len += num;
 307                         match(text);
 308                 }
 309                 break;
 310         case XK_BackSpace:
 311                 if(len == 0)
 312                         return;
 313                 for(i = 1; len - i > 0 && !IS_UTF8_1ST_CHAR(text[len - i]); i++);
 314                 len -= i;
 315                 text[len] = '\0';
 316                 match(text);
 317                 break;
 318         case XK_End:
 319                 while(next) {
 320                         sel = curr = next;
 321                         calcoffsets();
 322                 }
 323                 while(sel && sel->right)
 324                         sel = sel->right;
 325                 break;
 326         case XK_Escape:
 327                 exit(EXIT_FAILURE);
 328         case XK_Home:
 329                 sel = curr = item;
 330                 calcoffsets();
 331                 break;
 332         case XK_Left:
 333         case XK_Up:
 334                 if(!sel || !sel->left)
 335                         return;
 336                 sel = sel->left;
 337                 if(sel->right == curr) {
 338                         curr = prev;
 339                         calcoffsets();
 340                 }
 341                 break;
 342         case XK_Next:
 343                 if(!next)
 344                         return;
 345                 sel = curr = next;
 346                 calcoffsets();
 347                 break;
 348         case XK_Prior:
 349                 if(!prev)
 350                         return;
 351                 sel = curr = prev;
 352                 calcoffsets();
 353                 break;
 354         case XK_Return:
 355                 if(e->state & ShiftMask)
 356                         dinput();
 357                 fprintf(stdout, "%s", sel ? sel->text : text);
 358                 fflush(stdout);
 359                 exit(EXIT_SUCCESS);
 360         case XK_Right:
 361         case XK_Down:
 362                 if(!sel || !sel->right)
 363                         return;
 364                 sel = sel->right;
 365                 if(sel == next) {
 366                         curr = next;
 367                         calcoffsets();
 368                 }
 369                 break;
 370         case XK_Tab:
 371                 if(sel)
 372                         strncpy(text, sel->text, sizeof text);
 373                 dinput();
 374                 break;
 375         }
 376         drawmenu();
 377 }
 378
 379 void
 380 match(char *pattern) {
 381         unsigned int plen;
 382         Item *i, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
 383
 384         if(!pattern)
 385                 return;
 386         plen = strlen(pattern);
 387         item = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
 388         for(i = allitems; i; i = i->next)
 389                 if(!fstrncmp(pattern, i->text, plen + 1))
 390                         appenditem(i, &lexact, &exactend);
 391                 else if(!fstrncmp(pattern, i->text, plen))
 392                         appenditem(i, &lprefix, &prefixend);
 393                 else if(fstrstr(i->text, pattern))
 394                         appenditem(i, &lsubstr, &substrend);
 395         if(lexact) {
 396                 item = lexact;
 397                 itemend = exactend;
 398         }
 399         if(lprefix) {
 400                 if(itemend) {
 401                         itemend->right = lprefix;
 402                         lprefix->left = itemend;
 403                 }
 404                 else
 405                         item = lprefix;
 406                 itemend = prefixend;
 407         }
 408         if(lsubstr) {
 409                 if(itemend) {
 410                         itemend->right = lsubstr;
 411                         lsubstr->left = itemend;
 412                 }
 413                 else
 414                         item = lsubstr;
 415         }
 416         curr = prev = next = sel = item;
 417         calcoffsets();
 418 }
 419
 420 void
 421 readstdin(void) {
 422         char *p, buf[sizeof text];
 423         unsigned int len = 0, max = 0;
 424         Item *i, *new;
 425
 426         i = NULL;
 427         while(fgets(buf, sizeof buf, stdin)) {
 428                 len = strlen(buf);
 429                 if(buf[len-1] == '\n')
 430                         buf[--len] = '\0';
 431                 if(!(p = strdup(buf)))
 432                         eprint("cannot strdup %u bytes\n", len);
 433                 if((max = MAX(max, len)) == len)
 434                         maxname = p;
 435                 if(!(new = malloc(sizeof *new)))
 436                         eprint("cannot malloc %u bytes\n", sizeof *new);
 437                 new->next = new->left = new->right = NULL;
 438                 new->text = p;
 439                 if(!i)
 440                         allitems = new;
 441                 else
 442                         i->next = new;
 443                 i = new;
 444         }
 445 }
 446
 447 void
 448 run(void) {
 449         XEvent ev;
 450
 451         /* main event loop */
 452         XSync(dpy, False);
 453         while(!XNextEvent(dpy, &ev))
 454                 switch(ev.type) {
 455                 case KeyPress:
 456                         kpress(&ev.xkey);
 457                         break;
 458                 case Expose:
 459                         if(ev.xexpose.count == 0)
 460                                 drawmenu();
 461                         break;
 462                 case VisibilityNotify:
 463                         if(ev.xvisibility.state != VisibilityUnobscured)
 464                                 XRaiseWindow(dpy, win);
 465                         break;
 466                 }
 467         exit(EXIT_FAILURE);
 468 }
 469
 470 void
 471 setup(void) {
 472         int i, j, x, y;
 473 #if XINERAMA
 474         int n;
 475         XineramaScreenInfo *info = NULL;
 476 #endif
 477         XModifierKeymap *modmap;
 478         XSetWindowAttributes wa;
 479
 480         /* init modifier map */
 481         modmap = XGetModifierMapping(dpy);
 482         for(i = 0; i < 8; i++)
 483                 for(j = 0; j < modmap->max_keypermod; j++) {
 484                         if(modmap->modifiermap[i * modmap->max_keypermod + j]
 485                         == XKeysymToKeycode(dpy, XK_Num_Lock))
 486                                 numlockmask = (1 << i);
 487                 }
 488         XFreeModifiermap(modmap);
 489
 490         dc.dpy = dpy;
 491         normcol[ColBG] = getcolor(&dc, normbgcolor);
 492         normcol[ColFG] = getcolor(&dc, normfgcolor);
 493         selcol[ColBG] = getcolor(&dc, selbgcolor);
 494         selcol[ColFG] = getcolor(&dc, selfgcolor);
 495         initfont(&dc, font);
 496
 497         /* menu window */
 498         wa.override_redirect = True;
 499         wa.background_pixmap = ParentRelative;
 500         wa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
 501
 502         /* menu window geometry */
 503         mh = (dc.font.height + 2) * (lines + 1);
 504 #if XINERAMA
 505         if(XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
 506                 i = 0;
 507                 if(n > 1) {
 508                         int di;
 509                         unsigned int dui;
 510                         Window dummy;
 511                         if(XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui))
 512                                 for(i = 0; i < n; i++)
 513                                         if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
 514                                                 break;
 515                 }
 516                 x = info[i].x_org;
 517                 y = topbar ? info[i].y_org : info[i].y_org + info[i].height - mh;
 518                 mw = info[i].width;
 519                 XFree(info);
 520         }
 521         else
 522 #endif
 523         {
 524                 x = 0;
 525                 y = topbar ? 0 : mh - DisplayHeight(dpy, screen);
 526                 mw = DisplayWidth(dpy, screen);
 527         }
 528
 529         win = XCreateWindow(dpy, root, x, y, mw, mh, 0,
 530                         DefaultDepth(dpy, screen), CopyFromParent,
 531                         DefaultVisual(dpy, screen),
 532                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 533
 534         setupdraw(&dc, win);
 535         if(maxname)
 536                 cmdw = MIN(textw(&dc, maxname), mw / 3);
 537         if(prompt)
 538                 promptw = MIN(textw(&dc, prompt), mw / 5);
 539         text[0] = '\0';
 540         match(text);
 541         XMapRaised(dpy, win);
 542 }
 543
 544 int
 545 main(int argc, char *argv[]) {
 546         unsigned int i;
 547
 548         /* command line args */
 549         progname = "dmenu";
 550         for(i = 1; i < argc; i++)
 551                 if(!strcmp(argv[i], "-i")) {
 552                         fstrncmp = strncasecmp;
 553                         fstrstr = cistrstr;
 554                 }
 555                 else if(!strcmp(argv[i], "-b"))
 556                         topbar = False;
 557                 else if(!strcmp(argv[i], "-l")) {
 558                         if(++i < argc) lines = atoi(argv[i]);
 559                         if(lines > 0)
 560                                 calcoffsets = calcoffsetsv;
 561                 }
 562                 else if(!strcmp(argv[i], "-fn")) {
 563                         if(++i < argc) font = argv[i];
 564                 }
 565                 else if(!strcmp(argv[i], "-nb")) {
 566                         if(++i < argc) normbgcolor = argv[i];
 567                 }
 568                 else if(!strcmp(argv[i], "-nf")) {
 569                         if(++i < argc) normfgcolor = argv[i];
 570                 }
 571                 else if(!strcmp(argv[i], "-p")) {
 572                         if(++i < argc) prompt = argv[i];
 573                 }
 574                 else if(!strcmp(argv[i], "-sb")) {
 575                         if(++i < argc) selbgcolor = argv[i];
 576                 }
 577                 else if(!strcmp(argv[i], "-sf")) {
 578                         if(++i < argc) selfgcolor = argv[i];
 579                 }
 580                 else if(!strcmp(argv[i], "-v")) {
 581                         printf("dmenu-"VERSION", © 2006-2010 dmenu engineers, see LICENSE for details\n");
 582                         exit(EXIT_SUCCESS);
 583                 }
 584                 else {
 585                         fputs("usage: dmenu [-i] [-b] [-l <lines>] [-fn <font>] [-nb <color>]\n"
 586                               "             [-nf <color>] [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n", stderr);
 587                         exit(EXIT_FAILURE);
 588                 }
 589         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 590                 fprintf(stderr, "dmenu: warning: no locale support\n");
 591         if(!(dpy = XOpenDisplay(NULL)))
 592                 eprint("cannot open display\n");
 593         if(atexit(&cleanup) != 0)
 594                 eprint("cannot register cleanup\n");
 595         screen = DefaultScreen(dpy);
 596         root = RootWindow(dpy, screen);
 597         if(!(argp = malloc(sizeof *argp * (argc+2))))
 598                 eprint("cannot malloc %u bytes\n", sizeof *argp * (argc+2));
 599         memcpy(argp + 2, argv + 1, sizeof *argp * argc);
 600
 601         readstdin();
 602         grabkeyboard();
 603         setup();
 604         run();
 605         return 0;
 606 }