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 #include "dmenu.h"
  12
  13 typedef struct Item Item;
  14 struct Item {
  15         char *text;
  16         Item *next;         /* traverses all items */
  17         Item *left, *right; /* traverses items matching current search pattern */
  18 };
  19
  20 /* forward declarations */
  21 static void appenditem(Item *i, Item **list, Item **last);
  22 static void calcoffsetsh(void);
  23 static void calcoffsetsv(void);
  24 static char *cistrstr(const char *s, const char *sub);
  25 static void cleanup(void);
  26 static void dinput(void);
  27 static void drawmenuh(void);
  28 static void drawmenuv(void);
  29 static void match(void);
  30 static void readstdin(void);
  31
  32 /* variables */
  33 static char **argp = NULL;
  34 static char *maxname = NULL;
  35 static unsigned int cmdw = 0;
  36 static unsigned int lines = 0;
  37 static Item *allitems = NULL;  /* first of all items */
  38 static Item *item = NULL;      /* first of pattern matching items */
  39 static Item *sel = NULL;
  40 static Item *next = NULL;
  41 static Item *prev = NULL;
  42 static Item *curr = NULL;
  43 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
  44 static char *(*fstrstr)(const char *, const char *) = strstr;
  45 static void (*calcoffsets)(void) = calcoffsetsh;
  46
  47 void
  48 appenditem(Item *i, Item **list, Item **last) {
  49         if(!(*last))
  50                 *list = i;
  51         else
  52                 (*last)->right = i;
  53         i->left = *last;
  54         i->right = NULL;
  55         *last = i;
  56 }
  57
  58 void
  59 calcoffsetsh(void) {
  60         unsigned int w, x;
  61
  62         w = promptw + cmdw + textw(&dc, "<") + textw(&dc, ">");
  63         for(x = w, next = curr; next; next = next->right)
  64                 if((x += MIN(textw(&dc, next->text), mw / 3)) > mw)
  65                         break;
  66         for(x = w, prev = curr; prev && prev->left; prev = prev->left)
  67                 if((x += MIN(textw(&dc, prev->left->text), mw / 3)) > mw)
  68                         break;
  69 }
  70
  71 void
  72 calcoffsetsv(void) {
  73         unsigned int i;
  74
  75         next = prev = curr;
  76         for(i = 0; i < lines && next; i++)
  77                 next = next->right;
  78         mh = (dc.font.height + 2) * (i + 1);
  79         for(i = 0; i < lines && prev && prev->left; i++)
  80                 prev = prev->left;
  81 }
  82
  83 char *
  84 cistrstr(const char *s, const char *sub) {
  85         int c, csub;
  86         unsigned int len;
  87
  88         if(!sub)
  89                 return (char *)s;
  90         if((c = tolower(*sub++)) != '\0') {
  91                 len = strlen(sub);
  92                 do {
  93                         do {
  94                                 if((csub = *s++) == '\0')
  95                                         return NULL;
  96                         }
  97                         while(tolower(csub) != c);
  98                 }
  99                 while(strncasecmp(s, sub, len) != 0);
 100                 s--;
 101         }
 102         return (char *)s;
 103 }
 104
 105 void
 106 cleanup(void) {
 107         Item *itm;
 108
 109         while(allitems) {
 110                 itm = allitems->next;
 111                 free(allitems->text);
 112                 free(allitems);
 113                 allitems = itm;
 114         }
 115         cleanupdraw(&dc);
 116         XDestroyWindow(dpy, win);
 117         XUngrabKeyboard(dpy, CurrentTime);
 118         XCloseDisplay(dpy);
 119 }
 120
 121 void
 122 dinput(void) {
 123         cleanup();
 124         argp[0] = "dinput";
 125         argp[1] = text;
 126         execvp("dinput", argp);
 127         eprint("cannot exec dinput\n");
 128 }
 129
 130 void
 131 drawbar(void) {
 132         dc.x = 0;
 133         dc.y = 0;
 134         dc.w = mw;
 135         dc.h = mh;
 136         drawbox(&dc, normcol);
 137         dc.h = dc.font.height + 2;
 138         dc.y = topbar ? 0 : mh - dc.h;
 139         /* print prompt? */
 140         if(prompt) {
 141                 dc.w = promptw;
 142                 drawtext(&dc, prompt, selcol);
 143                 dc.x += dc.w;
 144         }
 145         dc.w = mw - dc.x;
 146         /* print command */
 147         if(cmdw && item && lines == 0)
 148                 dc.w = cmdw;
 149         drawtext(&dc, text, normcol);
 150         if(lines > 0)
 151                 drawmenuv();
 152         else if(curr)
 153                 drawmenuh();
 154         commitdraw(&dc, win);
 155 }
 156
 157 void
 158 drawmenuh(void) {
 159         unsigned long *col;
 160         Item *i;
 161
 162         dc.x += cmdw;
 163         dc.w = textw(&dc, "<");
 164         drawtext(&dc, curr->left ? "<" : NULL, normcol);
 165         dc.x += dc.w;
 166         for(i = curr; i != next; i = i->right) {
 167                 dc.w = MIN(textw(&dc, i->text), mw / 3);
 168                 col = (sel == i) ? selcol : normcol;
 169                 drawbox(&dc, col);
 170                 drawtext(&dc, i->text, col);
 171                 dc.x += dc.w;
 172         }
 173         dc.w = textw(&dc, ">");
 174         dc.x = mw - dc.w;
 175         drawtext(&dc, next ? ">" : NULL, normcol);
 176 }
 177
 178 void
 179 drawmenuv(void) {
 180         Item *i;
 181         XWindowAttributes wa;
 182
 183         dc.y = topbar ? dc.h : 0;
 184         dc.w = mw - dc.x;
 185         for(i = curr; i != next; i = i->right) {
 186                 drawtext(&dc, i->text, (sel == i) ? selcol : normcol);
 187                 dc.y += dc.h;
 188         }
 189         if(!XGetWindowAttributes(dpy, win, &wa))
 190                 eprint("cannot get window attributes");
 191         XMoveResizeWindow(dpy, win, wa.x, wa.y + (topbar ? 0 : wa.height - mh), mw, mh);
 192 }
 193
 194 void
 195 kpress(XKeyEvent *e) {
 196         char buf[sizeof text];
 197         int num;
 198         unsigned int i, len;
 199         KeySym ksym;
 200
 201         len = strlen(text);
 202         num = XLookupString(e, buf, sizeof buf, &ksym, NULL);
 203         if(ksym == XK_KP_Enter)
 204                 ksym = XK_Return;
 205         else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
 206                 ksym = (ksym - XK_KP_0) + XK_0;
 207         else if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
 208         || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
 209         || IsPrivateKeypadKey(ksym))
 210                 return;
 211         /* first check if a control mask is omitted */
 212         if(e->state & ControlMask) {
 213                 switch(tolower(ksym)) {
 214                 default:
 215                         return;
 216                 case XK_a:
 217                         ksym = XK_Home;
 218                         break;
 219                 case XK_b:
 220                         ksym = XK_Left;
 221                         break;
 222                 case XK_c:
 223                         ksym = XK_Escape;
 224                         break;
 225                 case XK_e:
 226                         ksym = XK_End;
 227                         break;
 228                 case XK_f:
 229                         ksym = XK_Right;
 230                         break;
 231                 case XK_h:
 232                         ksym = XK_BackSpace;
 233                         break;
 234                 case XK_i:
 235                         ksym = XK_Tab;
 236                         break;
 237                 case XK_j:
 238                 case XK_m:
 239                         ksym = XK_Return;
 240                         break;
 241                 case XK_n:
 242                         ksym = XK_Down;
 243                         break;
 244                 case XK_p:
 245                         ksym = XK_Up;
 246                         break;
 247                 case XK_u:
 248                         text[0] = '\0';
 249                         match();
 250                         break;
 251                 case XK_w:
 252                         if(len == 0)
 253                                 return;
 254                         i = len;
 255                         while(i-- > 0 && text[i] == ' ');
 256                         while(i-- > 0 && text[i] != ' ');
 257                         text[++i] = '\0';
 258                         match();
 259                         break;
 260                 }
 261         }
 262         switch(ksym) {
 263         default:
 264                 num = MIN(num, sizeof text);
 265                 if(num && !iscntrl((int) buf[0])) {
 266                         memcpy(text + len, buf, num + 1);
 267                         len += num;
 268                         match();
 269                 }
 270                 break;
 271         case XK_BackSpace:
 272                 if(len == 0)
 273                         return;
 274                 for(i = 1; len - i > 0 && !IS_UTF8_1ST_CHAR(text[len - i]); i++);
 275                 len -= i;
 276                 text[len] = '\0';
 277                 match();
 278                 break;
 279         case XK_End:
 280                 while(next) {
 281                         sel = curr = next;
 282                         calcoffsets();
 283                 }
 284                 while(sel && sel->right)
 285                         sel = sel->right;
 286                 break;
 287         case XK_Escape:
 288                 exit(EXIT_FAILURE);
 289         case XK_Home:
 290                 sel = curr = item;
 291                 calcoffsets();
 292                 break;
 293         case XK_Left:
 294         case XK_Up:
 295                 if(!sel || !sel->left)
 296                         return;
 297                 sel = sel->left;
 298                 if(sel->right == curr) {
 299                         curr = prev;
 300                         calcoffsets();
 301                 }
 302                 break;
 303         case XK_Next:
 304                 if(!next)
 305                         return;
 306                 sel = curr = next;
 307                 calcoffsets();
 308                 break;
 309         case XK_Prior:
 310                 if(!prev)
 311                         return;
 312                 sel = curr = prev;
 313                 calcoffsets();
 314                 break;
 315         case XK_Return:
 316                 if(e->state & ShiftMask)
 317                         dinput();
 318                 fprintf(stdout, "%s", sel ? sel->text : text);
 319                 fflush(stdout);
 320                 exit(EXIT_SUCCESS);
 321         case XK_Right:
 322         case XK_Down:
 323                 if(!sel || !sel->right)
 324                         return;
 325                 sel = sel->right;
 326                 if(sel == next) {
 327                         curr = next;
 328                         calcoffsets();
 329                 }
 330                 break;
 331         case XK_Tab:
 332                 if(sel)
 333                         strncpy(text, sel->text, sizeof text);
 334                 dinput();
 335                 break;
 336         }
 337         drawbar();
 338 }
 339
 340 void
 341 match(void) {
 342         unsigned int len;
 343         Item *i, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
 344
 345         len = strlen(text);
 346         item = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
 347         for(i = allitems; i; i = i->next)
 348                 if(!fstrncmp(text, i->text, len + 1))
 349                         appenditem(i, &lexact, &exactend);
 350                 else if(!fstrncmp(text, i->text, len))
 351                         appenditem(i, &lprefix, &prefixend);
 352                 else if(fstrstr(i->text, text))
 353                         appenditem(i, &lsubstr, &substrend);
 354         if(lexact) {
 355                 item = lexact;
 356                 itemend = exactend;
 357         }
 358         if(lprefix) {
 359                 if(itemend) {
 360                         itemend->right = lprefix;
 361                         lprefix->left = itemend;
 362                 }
 363                 else
 364                         item = lprefix;
 365                 itemend = prefixend;
 366         }
 367         if(lsubstr) {
 368                 if(itemend) {
 369                         itemend->right = lsubstr;
 370                         lsubstr->left = itemend;
 371                 }
 372                 else
 373                         item = lsubstr;
 374         }
 375         curr = prev = next = sel = item;
 376         calcoffsets();
 377 }
 378
 379 void
 380 readstdin(void) {
 381         char *p, buf[sizeof text];
 382         unsigned int len = 0, max = 0;
 383         Item *i, *new;
 384
 385         i = NULL;
 386         while(fgets(buf, sizeof buf, stdin)) {
 387                 len = strlen(buf);
 388                 if(buf[len-1] == '\n')
 389                         buf[--len] = '\0';
 390                 if(!(p = strdup(buf)))
 391                         eprint("cannot strdup %u bytes\n", len);
 392                 if((max = MAX(max, len)) == len)
 393                         maxname = p;
 394                 if(!(new = malloc(sizeof *new)))
 395                         eprint("cannot malloc %u bytes\n", sizeof *new);
 396                 new->next = new->left = new->right = NULL;
 397                 new->text = p;
 398                 if(!i)
 399                         allitems = new;
 400                 else
 401                         i->next = new;
 402                 i = new;
 403         }
 404 }
 405
 406 int
 407 main(int argc, char *argv[]) {
 408         unsigned int i;
 409
 410         /* command line args */
 411         progname = "dmenu";
 412         for(i = 1; i < argc; i++)
 413                 if(!strcmp(argv[i], "-i")) {
 414                         fstrncmp = strncasecmp;
 415                         fstrstr = cistrstr;
 416                 }
 417                 else if(!strcmp(argv[i], "-b"))
 418                         topbar = False;
 419                 else if(!strcmp(argv[i], "-l")) {
 420                         if(++i < argc) lines = atoi(argv[i]);
 421                         if(lines > 0)
 422                                 calcoffsets = calcoffsetsv;
 423                 }
 424                 else if(!strcmp(argv[i], "-fn")) {
 425                         if(++i < argc) font = argv[i];
 426                 }
 427                 else if(!strcmp(argv[i], "-nb")) {
 428                         if(++i < argc) normbgcolor = argv[i];
 429                 }
 430                 else if(!strcmp(argv[i], "-nf")) {
 431                         if(++i < argc) normfgcolor = argv[i];
 432                 }
 433                 else if(!strcmp(argv[i], "-p")) {
 434                         if(++i < argc) prompt = argv[i];
 435                 }
 436                 else if(!strcmp(argv[i], "-sb")) {
 437                         if(++i < argc) selbgcolor = argv[i];
 438                 }
 439                 else if(!strcmp(argv[i], "-sf")) {
 440                         if(++i < argc) selfgcolor = argv[i];
 441                 }
 442                 else if(!strcmp(argv[i], "-v")) {
 443                         printf("dmenu-"VERSION", © 2006-2010 dmenu engineers, see LICENSE for details\n");
 444                         exit(EXIT_SUCCESS);
 445                 }
 446                 else {
 447                         fputs("usage: dmenu [-i] [-b] [-l <lines>] [-fn <font>] [-nb <color>]\n"
 448                               "             [-nf <color>] [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n", stderr);
 449                         exit(EXIT_FAILURE);
 450                 }
 451         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 452                 fprintf(stderr, "dmenu: warning: no locale support\n");
 453         if(!(dpy = XOpenDisplay(NULL)))
 454                 eprint("cannot open display\n");
 455         if(atexit(&cleanup) != 0)
 456                 eprint("cannot register cleanup\n");
 457         screen = DefaultScreen(dpy);
 458         root = RootWindow(dpy, screen);
 459         if(!(argp = malloc(sizeof *argp * (argc+2))))
 460                 eprint("cannot malloc %u bytes\n", sizeof *argp * (argc+2));
 461         memcpy(argp + 2, argv + 1, sizeof *argp * argc);
 462
 463         readstdin();
 464         grabkeyboard();
 465         setup(lines);
 466         if(maxname)
 467                 cmdw = MIN(textw(&dc, maxname), mw / 3);
 468         match();
 469         run();
 470         return 0;
 471 }