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 drawitem(const char *s, unsigned long col[ColLast]);
  28 static void drawmenuh(void);
  29 static void drawmenuv(void);
  30 static void match(void);
  31 static void readstdin(void);
  32
  33 /* variables */
  34 static char **argp = NULL;
  35 static char *maxname = NULL;
  36 static unsigned int cmdw = 0;
  37 static unsigned int lines = 0;
  38 static Item *allitems = NULL;  /* first of all items */
  39 static Item *item = NULL;      /* first of pattern matching items */
  40 static Item *sel = NULL;
  41 static Item *next = NULL;
  42 static Item *prev = NULL;
  43 static Item *curr = NULL;
  44 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
  45 static char *(*fstrstr)(const char *, const char *) = strstr;
  46 static void (*calcoffsets)(void) = calcoffsetsh;
  47
  48 void
  49 appenditem(Item *i, Item **list, Item **last) {
  50         if(!(*last))
  51                 *list = i;
  52         else
  53                 (*last)->right = i;
  54         i->left = *last;
  55         i->right = NULL;
  56         *last = i;
  57 }
  58
  59 void
  60 calcoffsetsh(void) {
  61         unsigned int w, x;
  62
  63         w = promptw + cmdw + textw(&dc, "<") + textw(&dc, ">");
  64         for(x = w, next = curr; next; next = next->right)
  65                 if((x += MIN(textw(&dc, next->text), mw / 3)) > mw)
  66                         break;
  67         for(x = w, prev = curr; prev && prev->left; prev = prev->left)
  68                 if((x += MIN(textw(&dc, prev->left->text), mw / 3)) > mw)
  69                         break;
  70 }
  71
  72 void
  73 calcoffsetsv(void) {
  74         unsigned int i;
  75
  76         next = prev = curr;
  77         for(i = 0; i < lines && next; i++)
  78                 next = next->right;
  79         mh = (dc.font.height + 2) * (i + 1);
  80         for(i = 0; i < lines && prev && prev->left; i++)
  81                 prev = prev->left;
  82 }
  83
  84 char *
  85 cistrstr(const char *s, const char *sub) {
  86         int c, csub;
  87         unsigned int len;
  88
  89         if(!sub)
  90                 return (char *)s;
  91         if((c = tolower(*sub++)) != '\0') {
  92                 len = strlen(sub);
  93                 do {
  94                         do {
  95                                 if((csub = *s++) == '\0')
  96                                         return NULL;
  97                         }
  98                         while(tolower(csub) != c);
  99                 }
 100                 while(strncasecmp(s, sub, len) != 0);
 101                 s--;
 102         }
 103         return (char *)s;
 104 }
 105
 106 void
 107 cleanup(void) {
 108         Item *itm;
 109
 110         while(allitems) {
 111                 itm = allitems->next;
 112                 free(allitems->text);
 113                 free(allitems);
 114                 allitems = itm;
 115         }
 116         cleanupdraw(&dc);
 117         XDestroyWindow(dpy, win);
 118         XUngrabKeyboard(dpy, CurrentTime);
 119         XCloseDisplay(dpy);
 120 }
 121
 122 void
 123 dinput(void) {
 124         cleanup();
 125         argp[0] = "dinput";
 126         argp[1] = text;
 127         execvp("dinput", argp);
 128         eprint("cannot exec dinput\n");
 129 }
 130
 131 void
 132 drawbar(void) {
 133         dc.x = 0;
 134         dc.y = 0;
 135         dc.w = mw;
 136         dc.h = mh;
 137         drawbox(&dc, normcol);
 138         dc.h = dc.font.height + 2;
 139         dc.y = topbar ? 0 : mh - dc.h;
 140         /* print prompt? */
 141         if(prompt) {
 142                 dc.w = promptw;
 143                 drawbox(&dc, selcol);
 144                 drawtext(&dc, prompt, selcol);
 145                 dc.x += dc.w;
 146         }
 147         dc.w = mw - dc.x;
 148         /* print command */
 149         if(cmdw && item && lines == 0)
 150                 dc.w = cmdw;
 151         drawtext(&dc, text, normcol);
 152         if(lines > 0)
 153                 drawmenuv();
 154         else if(curr)
 155                 drawmenuh();
 156         commitdraw(&dc, win);
 157 }
 158
 159 void
 160 drawitem(const char *s, unsigned long col[ColLast]) {
 161         const char *p;
 162         unsigned int w = textnw(&dc, text, strlen(text));
 163
 164         drawbox(&dc, col);
 165         drawtext(&dc, s, col);
 166         for(p = fstrstr(s, text); *text && (p = fstrstr(p, text)); p++)
 167                 drawline(&dc, textnw(&dc, s, p-s) + dc.h/2 - 1, dc.h-2, w, 1, col);
 168 }
 169
 170 void
 171 drawmenuh(void) {
 172         Item *i;
 173
 174         dc.x += cmdw;
 175         dc.w = textw(&dc, "<");
 176         drawtext(&dc, curr->left ? "<" : NULL, normcol);
 177         dc.x += dc.w;
 178         for(i = curr; i != next; i = i->right) {
 179                 dc.w = MIN(textw(&dc, i->text), mw / 3);
 180                 drawitem(i->text, (sel == i) ? selcol : normcol);
 181                 dc.x += dc.w;
 182         }
 183         dc.w = textw(&dc, ">");
 184         dc.x = mw - dc.w;
 185         drawtext(&dc, next ? ">" : NULL, normcol);
 186 }
 187
 188 void
 189 drawmenuv(void) {
 190         Item *i;
 191         XWindowAttributes wa;
 192
 193         dc.y = topbar ? dc.h : 0;
 194         dc.w = mw - dc.x;
 195         for(i = curr; i != next; i = i->right) {
 196                 drawitem(i->text, (sel == i) ? selcol : normcol);
 197                 dc.y += dc.h;
 198         }
 199         if(!XGetWindowAttributes(dpy, win, &wa))
 200                 eprint("cannot get window attributes");
 201         XMoveResizeWindow(dpy, win, wa.x, wa.y + (topbar ? 0 : wa.height - mh), mw, mh);
 202 }
 203
 204 void
 205 kpress(XKeyEvent *e) {
 206         char buf[sizeof text];
 207         int num;
 208         unsigned int i, len;
 209         KeySym ksym;
 210
 211         len = strlen(text);
 212         num = XLookupString(e, buf, sizeof buf, &ksym, NULL);
 213         if(ksym == XK_KP_Enter)
 214                 ksym = XK_Return;
 215         else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
 216                 ksym = (ksym - XK_KP_0) + XK_0;
 217         else if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
 218         || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
 219         || IsPrivateKeypadKey(ksym))
 220                 return;
 221         /* first check if a control mask is omitted */
 222         if(e->state & ControlMask) {
 223                 switch(tolower(ksym)) {
 224                 default:
 225                         return;
 226                 case XK_a:
 227                         ksym = XK_Home;
 228                         break;
 229                 case XK_b:
 230                         ksym = XK_Left;
 231                         break;
 232                 case XK_c:
 233                         ksym = XK_Escape;
 234                         break;
 235                 case XK_e:
 236                         ksym = XK_End;
 237                         break;
 238                 case XK_f:
 239                         ksym = XK_Right;
 240                         break;
 241                 case XK_h:
 242                         ksym = XK_BackSpace;
 243                         break;
 244                 case XK_i:
 245                         ksym = XK_Tab;
 246                         break;
 247                 case XK_j:
 248                 case XK_m:
 249                         ksym = XK_Return;
 250                         break;
 251                 case XK_n:
 252                         ksym = XK_Down;
 253                         break;
 254                 case XK_p:
 255                         ksym = XK_Up;
 256                         break;
 257                 case XK_u:
 258                         text[0] = '\0';
 259                         match();
 260                         break;
 261                 case XK_w:
 262                         if(len == 0)
 263                                 return;
 264                         i = len;
 265                         while(i-- > 0 && text[i] == ' ');
 266                         while(i-- > 0 && text[i] != ' ');
 267                         text[++i] = '\0';
 268                         match();
 269                         break;
 270                 }
 271         }
 272         switch(ksym) {
 273         default:
 274                 num = MIN(num, sizeof text);
 275                 if(num && !iscntrl((int) buf[0])) {
 276                         memcpy(text + len, buf, num + 1);
 277                         len += num;
 278                         match();
 279                 }
 280                 break;
 281         case XK_BackSpace:
 282                 if(len == 0)
 283                         return;
 284                 for(i = 1; len - i > 0 && !IS_UTF8_1ST_CHAR(text[len - i]); i++);
 285                 len -= i;
 286                 text[len] = '\0';
 287                 match();
 288                 break;
 289         case XK_End:
 290                 while(next) {
 291                         sel = curr = next;
 292                         calcoffsets();
 293                 }
 294                 while(sel && sel->right)
 295                         sel = sel->right;
 296                 break;
 297         case XK_Escape:
 298                 exit(EXIT_FAILURE);
 299         case XK_Home:
 300                 sel = curr = item;
 301                 calcoffsets();
 302                 break;
 303         case XK_Left:
 304         case XK_Up:
 305                 if(!sel || !sel->left)
 306                         return;
 307                 sel = sel->left;
 308                 if(sel->right == curr) {
 309                         curr = prev;
 310                         calcoffsets();
 311                 }
 312                 break;
 313         case XK_Next:
 314                 if(!next)
 315                         return;
 316                 sel = curr = next;
 317                 calcoffsets();
 318                 break;
 319         case XK_Prior:
 320                 if(!prev)
 321                         return;
 322                 sel = curr = prev;
 323                 calcoffsets();
 324                 break;
 325         case XK_Return:
 326                 if(e->state & ShiftMask)
 327                         dinput();
 328                 fprintf(stdout, "%s", sel ? sel->text : text);
 329                 fflush(stdout);
 330                 exit(EXIT_SUCCESS);
 331         case XK_Right:
 332         case XK_Down:
 333                 if(!sel || !sel->right)
 334                         return;
 335                 sel = sel->right;
 336                 if(sel == next) {
 337                         curr = next;
 338                         calcoffsets();
 339                 }
 340                 break;
 341         case XK_Tab:
 342                 if(sel)
 343                         strncpy(text, sel->text, sizeof text);
 344                 dinput();
 345                 break;
 346         }
 347         drawbar();
 348 }
 349
 350 void
 351 match(void) {
 352         unsigned int len;
 353         Item *i, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
 354
 355         len = strlen(text);
 356         item = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
 357         for(i = allitems; i; i = i->next)
 358                 if(!fstrncmp(text, i->text, len + 1))
 359                         appenditem(i, &lexact, &exactend);
 360                 else if(!fstrncmp(text, i->text, len))
 361                         appenditem(i, &lprefix, &prefixend);
 362                 else if(fstrstr(i->text, text))
 363                         appenditem(i, &lsubstr, &substrend);
 364         if(lexact) {
 365                 item = lexact;
 366                 itemend = exactend;
 367         }
 368         if(lprefix) {
 369                 if(itemend) {
 370                         itemend->right = lprefix;
 371                         lprefix->left = itemend;
 372                 }
 373                 else
 374                         item = lprefix;
 375                 itemend = prefixend;
 376         }
 377         if(lsubstr) {
 378                 if(itemend) {
 379                         itemend->right = lsubstr;
 380                         lsubstr->left = itemend;
 381                 }
 382                 else
 383                         item = lsubstr;
 384         }
 385         curr = prev = next = sel = item;
 386         calcoffsets();
 387 }
 388
 389 void
 390 readstdin(void) {
 391         char *p, buf[sizeof text];
 392         unsigned int len = 0, max = 0;
 393         Item *i, *new;
 394
 395         i = NULL;
 396         while(fgets(buf, sizeof buf, stdin)) {
 397                 len = strlen(buf);
 398                 if(buf[len-1] == '\n')
 399                         buf[--len] = '\0';
 400                 if(!(p = strdup(buf)))
 401                         eprint("cannot strdup %u bytes\n", len);
 402                 if((max = MAX(max, len)) == len)
 403                         maxname = p;
 404                 if(!(new = malloc(sizeof *new)))
 405                         eprint("cannot malloc %u bytes\n", sizeof *new);
 406                 new->next = new->left = new->right = NULL;
 407                 new->text = p;
 408                 if(!i)
 409                         allitems = new;
 410                 else
 411                         i->next = new;
 412                 i = new;
 413         }
 414 }
 415
 416 int
 417 main(int argc, char *argv[]) {
 418         unsigned int i;
 419
 420         /* command line args */
 421         progname = "dmenu";
 422         for(i = 1; i < argc; i++)
 423                 if(!strcmp(argv[i], "-i")) {
 424                         fstrncmp = strncasecmp;
 425                         fstrstr = cistrstr;
 426                 }
 427                 else if(!strcmp(argv[i], "-b"))
 428                         topbar = False;
 429                 else if(!strcmp(argv[i], "-l")) {
 430                         if(++i < argc) lines = atoi(argv[i]);
 431                         if(lines > 0)
 432                                 calcoffsets = calcoffsetsv;
 433                 }
 434                 else if(!strcmp(argv[i], "-fn")) {
 435                         if(++i < argc) font = argv[i];
 436                 }
 437                 else if(!strcmp(argv[i], "-nb")) {
 438                         if(++i < argc) normbgcolor = argv[i];
 439                 }
 440                 else if(!strcmp(argv[i], "-nf")) {
 441                         if(++i < argc) normfgcolor = argv[i];
 442                 }
 443                 else if(!strcmp(argv[i], "-p")) {
 444                         if(++i < argc) prompt = argv[i];
 445                 }
 446                 else if(!strcmp(argv[i], "-sb")) {
 447                         if(++i < argc) selbgcolor = argv[i];
 448                 }
 449                 else if(!strcmp(argv[i], "-sf")) {
 450                         if(++i < argc) selfgcolor = argv[i];
 451                 }
 452                 else if(!strcmp(argv[i], "-v")) {
 453                         printf("dmenu-"VERSION", © 2006-2010 dmenu engineers, see LICENSE for details\n");
 454                         exit(EXIT_SUCCESS);
 455                 }
 456                 else {
 457                         fputs("usage: dmenu [-i] [-b] [-l <lines>] [-fn <font>] [-nb <color>]\n"
 458                               "             [-nf <color>] [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n", stderr);
 459                         exit(EXIT_FAILURE);
 460                 }
 461         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 462                 fprintf(stderr, "dmenu: warning: no locale support\n");
 463         if(!(dpy = XOpenDisplay(NULL)))
 464                 eprint("cannot open display\n");
 465         if(atexit(&cleanup) != 0)
 466                 eprint("cannot register cleanup\n");
 467         screen = DefaultScreen(dpy);
 468         root = RootWindow(dpy, screen);
 469         if(!(argp = malloc(sizeof *argp * (argc+2))))
 470                 eprint("cannot malloc %u bytes\n", sizeof *argp * (argc+2));
 471         memcpy(argp + 2, argv + 1, sizeof *argp * argc);
 472
 473         readstdin();
 474         grabkeyboard();
 475         setup(lines);
 476         if(maxname)
 477                 cmdw = MIN(textw(&dc, maxname), mw / 3);
 478         match();
 479         run();
 480         return 0;
 481 }