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         drawtext(&dc, NULL, 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         Item *i;
 160
 161         dc.x += cmdw;
 162         dc.w = textw(&dc, "<");
 163         drawtext(&dc, curr->left ? "<" : NULL, normcol);
 164         dc.x += dc.w;
 165         for(i = curr; i != next; i = i->right) {
 166                 dc.w = MIN(textw(&dc, i->text), mw / 3);
 167                 drawtext(&dc, i->text, (sel == i) ? selcol : normcol);
 168                 dc.x += dc.w;
 169         }
 170         dc.w = textw(&dc, ">");
 171         dc.x = mw - dc.w;
 172         drawtext(&dc, next ? ">" : NULL, normcol);
 173 }
 174
 175 void
 176 drawmenuv(void) {
 177         Item *i;
 178         XWindowAttributes wa;
 179
 180         dc.y = topbar ? dc.h : 0;
 181         dc.w = mw - dc.x;
 182         for(i = curr; i != next; i = i->right) {
 183                 drawtext(&dc, i->text, (sel == i) ? selcol : normcol);
 184                 dc.y += dc.h;
 185         }
 186         if(!XGetWindowAttributes(dpy, win, &wa))
 187                 eprint("cannot get window attributes");
 188         XMoveResizeWindow(dpy, win, wa.x, wa.y + (topbar ? 0 : wa.height - mh), mw, mh);
 189 }
 190
 191 void
 192 kpress(XKeyEvent *e) {
 193         char buf[sizeof text];
 194         int num;
 195         unsigned int i, len;
 196         KeySym ksym;
 197
 198         len = strlen(text);
 199         num = XLookupString(e, buf, sizeof buf, &ksym, NULL);
 200         if(ksym == XK_KP_Enter)
 201                 ksym = XK_Return;
 202         else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
 203                 ksym = (ksym - XK_KP_0) + XK_0;
 204         else if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
 205         || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
 206         || IsPrivateKeypadKey(ksym))
 207                 return;
 208         /* first check if a control mask is omitted */
 209         if(e->state & ControlMask) {
 210                 switch(tolower(ksym)) {
 211                 default:
 212                         return;
 213                 case XK_a:
 214                         ksym = XK_Home;
 215                         break;
 216                 case XK_b:
 217                         ksym = XK_Left;
 218                         break;
 219                 case XK_c:
 220                         ksym = XK_Escape;
 221                         break;
 222                 case XK_e:
 223                         ksym = XK_End;
 224                         break;
 225                 case XK_f:
 226                         ksym = XK_Right;
 227                         break;
 228                 case XK_h:
 229                         ksym = XK_BackSpace;
 230                         break;
 231                 case XK_i:
 232                         ksym = XK_Tab;
 233                         break;
 234                 case XK_j:
 235                 case XK_m:
 236                         ksym = XK_Return;
 237                         break;
 238                 case XK_n:
 239                         ksym = XK_Down;
 240                         break;
 241                 case XK_p:
 242                         ksym = XK_Up;
 243                         break;
 244                 case XK_u:
 245                         text[0] = '\0';
 246                         match();
 247                         break;
 248                 case XK_w:
 249                         if(len == 0)
 250                                 return;
 251                         i = len;
 252                         while(i-- > 0 && text[i] == ' ');
 253                         while(i-- > 0 && text[i] != ' ');
 254                         text[++i] = '\0';
 255                         match();
 256                         break;
 257                 }
 258         }
 259         switch(ksym) {
 260         default:
 261                 num = MIN(num, sizeof text);
 262                 if(num && !iscntrl((int) buf[0])) {
 263                         memcpy(text + len, buf, num + 1);
 264                         len += num;
 265                         match();
 266                 }
 267                 break;
 268         case XK_BackSpace:
 269                 if(len == 0)
 270                         return;
 271                 for(i = 1; len - i > 0 && !IS_UTF8_1ST_CHAR(text[len - i]); i++);
 272                 len -= i;
 273                 text[len] = '\0';
 274                 match();
 275                 break;
 276         case XK_End:
 277                 while(next) {
 278                         sel = curr = next;
 279                         calcoffsets();
 280                 }
 281                 while(sel && sel->right)
 282                         sel = sel->right;
 283                 break;
 284         case XK_Escape:
 285                 exit(EXIT_FAILURE);
 286         case XK_Home:
 287                 sel = curr = item;
 288                 calcoffsets();
 289                 break;
 290         case XK_Left:
 291         case XK_Up:
 292                 if(!sel || !sel->left)
 293                         return;
 294                 sel = sel->left;
 295                 if(sel->right == curr) {
 296                         curr = prev;
 297                         calcoffsets();
 298                 }
 299                 break;
 300         case XK_Next:
 301                 if(!next)
 302                         return;
 303                 sel = curr = next;
 304                 calcoffsets();
 305                 break;
 306         case XK_Prior:
 307                 if(!prev)
 308                         return;
 309                 sel = curr = prev;
 310                 calcoffsets();
 311                 break;
 312         case XK_Return:
 313                 if(e->state & ShiftMask)
 314                         dinput();
 315                 fprintf(stdout, "%s", sel ? sel->text : text);
 316                 fflush(stdout);
 317                 exit(EXIT_SUCCESS);
 318         case XK_Right:
 319         case XK_Down:
 320                 if(!sel || !sel->right)
 321                         return;
 322                 sel = sel->right;
 323                 if(sel == next) {
 324                         curr = next;
 325                         calcoffsets();
 326                 }
 327                 break;
 328         case XK_Tab:
 329                 if(sel)
 330                         strncpy(text, sel->text, sizeof text);
 331                 dinput();
 332                 break;
 333         }
 334         drawbar();
 335 }
 336
 337 void
 338 match(void) {
 339         unsigned int len;
 340         Item *i, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
 341
 342         len = strlen(text);
 343         item = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
 344         for(i = allitems; i; i = i->next)
 345                 if(!fstrncmp(text, i->text, len + 1))
 346                         appenditem(i, &lexact, &exactend);
 347                 else if(!fstrncmp(text, i->text, len))
 348                         appenditem(i, &lprefix, &prefixend);
 349                 else if(fstrstr(i->text, text))
 350                         appenditem(i, &lsubstr, &substrend);
 351         if(lexact) {
 352                 item = lexact;
 353                 itemend = exactend;
 354         }
 355         if(lprefix) {
 356                 if(itemend) {
 357                         itemend->right = lprefix;
 358                         lprefix->left = itemend;
 359                 }
 360                 else
 361                         item = lprefix;
 362                 itemend = prefixend;
 363         }
 364         if(lsubstr) {
 365                 if(itemend) {
 366                         itemend->right = lsubstr;
 367                         lsubstr->left = itemend;
 368                 }
 369                 else
 370                         item = lsubstr;
 371         }
 372         curr = prev = next = sel = item;
 373         calcoffsets();
 374 }
 375
 376 void
 377 readstdin(void) {
 378         char *p, buf[sizeof text];
 379         unsigned int len = 0, max = 0;
 380         Item *i, *new;
 381
 382         i = NULL;
 383         while(fgets(buf, sizeof buf, stdin)) {
 384                 len = strlen(buf);
 385                 if(buf[len-1] == '\n')
 386                         buf[--len] = '\0';
 387                 if(!(p = strdup(buf)))
 388                         eprint("cannot strdup %u bytes\n", len);
 389                 if((max = MAX(max, len)) == len)
 390                         maxname = p;
 391                 if(!(new = malloc(sizeof *new)))
 392                         eprint("cannot malloc %u bytes\n", sizeof *new);
 393                 new->next = new->left = new->right = NULL;
 394                 new->text = p;
 395                 if(!i)
 396                         allitems = new;
 397                 else
 398                         i->next = new;
 399                 i = new;
 400         }
 401 }
 402
 403 int
 404 main(int argc, char *argv[]) {
 405         unsigned int i;
 406
 407         /* command line args */
 408         progname = "dmenu";
 409         for(i = 1; i < argc; i++)
 410                 if(!strcmp(argv[i], "-i")) {
 411                         fstrncmp = strncasecmp;
 412                         fstrstr = cistrstr;
 413                 }
 414                 else if(!strcmp(argv[i], "-b"))
 415                         topbar = False;
 416                 else if(!strcmp(argv[i], "-l")) {
 417                         if(++i < argc) lines = atoi(argv[i]);
 418                         if(lines > 0)
 419                                 calcoffsets = calcoffsetsv;
 420                 }
 421                 else if(!strcmp(argv[i], "-fn")) {
 422                         if(++i < argc) font = argv[i];
 423                 }
 424                 else if(!strcmp(argv[i], "-nb")) {
 425                         if(++i < argc) normbgcolor = argv[i];
 426                 }
 427                 else if(!strcmp(argv[i], "-nf")) {
 428                         if(++i < argc) normfgcolor = argv[i];
 429                 }
 430                 else if(!strcmp(argv[i], "-p")) {
 431                         if(++i < argc) prompt = argv[i];
 432                 }
 433                 else if(!strcmp(argv[i], "-sb")) {
 434                         if(++i < argc) selbgcolor = argv[i];
 435                 }
 436                 else if(!strcmp(argv[i], "-sf")) {
 437                         if(++i < argc) selfgcolor = argv[i];
 438                 }
 439                 else if(!strcmp(argv[i], "-v")) {
 440                         printf("dmenu-"VERSION", © 2006-2010 dmenu engineers, see LICENSE for details\n");
 441                         exit(EXIT_SUCCESS);
 442                 }
 443                 else {
 444                         fputs("usage: dmenu [-i] [-b] [-l <lines>] [-fn <font>] [-nb <color>]\n"
 445                               "             [-nf <color>] [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n", stderr);
 446                         exit(EXIT_FAILURE);
 447                 }
 448         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 449                 fprintf(stderr, "dmenu: warning: no locale support\n");
 450         if(!(dpy = XOpenDisplay(NULL)))
 451                 eprint("cannot open display\n");
 452         if(atexit(&cleanup) != 0)
 453                 eprint("cannot register cleanup\n");
 454         screen = DefaultScreen(dpy);
 455         root = RootWindow(dpy, screen);
 456         if(!(argp = malloc(sizeof *argp * (argc+2))))
 457                 eprint("cannot malloc %u bytes\n", sizeof *argp * (argc+2));
 458         memcpy(argp + 2, argv + 1, sizeof *argp * argc);
 459
 460         readstdin();
 461         grabkeyboard();
 462         setup(lines);
 463         if(maxname)
 464                 cmdw = MIN(textw(&dc, maxname), mw / 3);
 465         match();
 466         run();
 467         return 0;
 468 }