dmenu.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include <ctype.h>
   3 #include <locale.h>
   4 #include <math.h>
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <strings.h>
   9 #include <time.h>
  10 #include <unistd.h>
  11
  12 #include <X11/Xlib.h>
  13 #include <X11/Xatom.h>
  14 #include <X11/Xproto.h>
  15 #include <X11/Xutil.h>
  16 #ifdef XINERAMA
  17 #include <X11/extensions/Xinerama.h>
  18 #endif
  19 #include <X11/Xft/Xft.h>
  20
  21 #include "drw.h"
  22 #include "util.h"
  23
  24 /* macros */
  25 #define INTERSECT(x,y,w,h,r)  (MAX(0, MIN((x)+(w),(r).x_org+(r).width)  - MAX((x),(r).x_org)) \
  26                              * MAX(0, MIN((y)+(h),(r).y_org+(r).height) - MAX((y),(r).y_org)))
  27 #define LENGTH(X)             (sizeof X / sizeof X[0])
  28 #define TEXTW(X)              (drw_fontset_getwidth(drw, (X)) + lrpad)
  29
  30 #define OPAQUE                0xffU
  31
  32 /* enums */
  33 enum { SchemeNorm, SchemeSel, SchemeOut, SchemeLast }; /* color schemes */
  34
  35 struct item {
  36         char *text;
  37         struct item *left, *right;
  38         int out;
  39         double distance;
  40 };
  41
  42 static char text[BUFSIZ] = "";
  43 static char *embed;
  44 static int bh, mw, mh;
  45 static int inputw = 0, promptw;
  46 static int lrpad; /* sum of left and right padding */
  47 static size_t cursor;
  48 static struct item *items = NULL;
  49 static struct item *matches, *matchend;
  50 static struct item *prev, *curr, *next, *sel;
  51 static int mon = -1, screen;
  52
  53 static Atom clip, utf8;
  54 static Display *dpy;
  55 static Window root, parentwin, win;
  56 static XIC xic;
  57
  58 static Drw *drw;
  59 static Clr *scheme[SchemeLast];
  60
  61 static int useargb = 0;
  62 static Visual *visual;
  63 static int depth;
  64 static Colormap cmap;
  65
  66 #include "config.h"
  67
  68 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
  69 static char *(*fstrstr)(const char *, const char *) = strstr;
  70 static void xinitvisual();
  71
  72 static unsigned int
  73 textw_clamp(const char *str, unsigned int n)
  74 {
  75         unsigned int w = drw_fontset_getwidth_clamp(drw, str, n) + lrpad;
  76         return MIN(w, n);
  77 }
  78
  79 static void
  80 appenditem(struct item *item, struct item **list, struct item **last)
  81 {
  82         if (*last)
  83                 (*last)->right = item;
  84         else
  85                 *list = item;
  86
  87         item->left = *last;
  88         item->right = NULL;
  89         *last = item;
  90 }
  91
  92 static void
  93 calcoffsets(void)
  94 {
  95         int i, n;
  96
  97         if (lines > 0)
  98                 n = lines * bh;
  99         else
 100                 n = mw - (promptw + inputw + TEXTW("<") + TEXTW(">"));
 101         /* calculate which items will begin the next page and previous page */
 102         for (i = 0, next = curr; next; next = next->right)
 103                 if ((i += (lines > 0) ? bh : textw_clamp(next->text, n)) > n)
 104                         break;
 105         for (i = 0, prev = curr; prev && prev->left; prev = prev->left)
 106                 if ((i += (lines > 0) ? bh : textw_clamp(prev->left->text, n)) > n)
 107                         break;
 108 }
 109
 110 static int
 111 max_textw(void)
 112 {
 113         int len = 0;
 114         for (struct item *item = items; item && item->text; item++)
 115                 len = MAX(TEXTW(item->text), len);
 116         return len;
 117 }
 118
 119 static void
 120 cleanup(void)
 121 {
 122         size_t i;
 123
 124         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 125         for (i = 0; i < SchemeLast; i++)
 126                 free(scheme[i]);
 127         for (i = 0; items && items[i].text; ++i)
 128                 free(items[i].text);
 129         free(items);
 130         drw_free(drw);
 131         XSync(dpy, False);
 132         XCloseDisplay(dpy);
 133 }
 134
 135 static char *
 136 cistrstr(const char *h, const char *n)
 137 {
 138         size_t i;
 139
 140         if (!n[0])
 141                 return (char *)h;
 142
 143         for (; *h; ++h) {
 144                 for (i = 0; n[i] && tolower((unsigned char)n[i]) ==
 145                             tolower((unsigned char)h[i]); ++i)
 146                         ;
 147                 if (n[i] == '\0')
 148                         return (char *)h;
 149         }
 150         return NULL;
 151 }
 152
 153 static int
 154 drawitem(struct item *item, int x, int y, int w)
 155 {
 156         if (item == sel)
 157                 drw_setscheme(drw, scheme[SchemeSel]);
 158         else if (item->out)
 159                 drw_setscheme(drw, scheme[SchemeOut]);
 160         else
 161                 drw_setscheme(drw, scheme[SchemeNorm]);
 162
 163         return drw_text(drw, x, y, w, bh, lrpad / 2, item->text, 0);
 164 }
 165
 166 static void
 167 drawmenu(void)
 168 {
 169         unsigned int curpos;
 170         struct item *item;
 171         int x = 0, y = 0, w;
 172
 173         drw_setscheme(drw, scheme[SchemeNorm]);
 174         drw_rect(drw, 0, 0, mw, mh, 1, 1);
 175
 176         if (prompt && *prompt) {
 177                 drw_setscheme(drw, scheme[SchemeSel]);
 178                 x = drw_text(drw, x, 0, promptw, bh, lrpad / 2, prompt, 0);
 179         }
 180         /* draw input field */
 181         w = (lines > 0 || !matches) ? mw - x : inputw;
 182         drw_setscheme(drw, scheme[SchemeNorm]);
 183         drw_text(drw, x, 0, w, bh, lrpad / 2, text, 0);
 184
 185         curpos = TEXTW(text) - TEXTW(&text[cursor]);
 186         if ((curpos += lrpad / 2 - 1) < w) {
 187                 drw_setscheme(drw, scheme[SchemeNorm]);
 188                 drw_rect(drw, x + curpos, 2, 2, bh - 4, 1, 0);
 189         }
 190
 191         if (lines > 0) {
 192                 /* draw vertical list */
 193                 for (item = curr; item != next; item = item->right)
 194                         drawitem(item, x, y += bh, mw - x);
 195         } else if (matches) {
 196                 /* draw horizontal list */
 197                 x += inputw;
 198                 w = TEXTW("<");
 199                 if (curr->left) {
 200                         drw_setscheme(drw, scheme[SchemeNorm]);
 201                         drw_text(drw, x, 0, w, bh, lrpad / 2, "<", 0);
 202                 }
 203                 x += w;
 204                 for (item = curr; item != next; item = item->right)
 205                         x = drawitem(item, x, 0, textw_clamp(item->text, mw - x - TEXTW(">")));
 206                 if (next) {
 207                         w = TEXTW(">");
 208                         drw_setscheme(drw, scheme[SchemeNorm]);
 209                         drw_text(drw, mw - w, 0, w, bh, lrpad / 2, ">", 0);
 210                 }
 211         }
 212         drw_map(drw, win, 0, 0, mw, mh);
 213 }
 214
 215 static void
 216 grabfocus(void)
 217 {
 218         struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000  };
 219         Window focuswin;
 220         int i, revertwin;
 221
 222         for (i = 0; i < 100; ++i) {
 223                 XGetInputFocus(dpy, &focuswin, &revertwin);
 224                 if (focuswin == win)
 225                         return;
 226                 XSetInputFocus(dpy, win, RevertToParent, CurrentTime);
 227                 nanosleep(&ts, NULL);
 228         }
 229         die("cannot grab focus");
 230 }
 231
 232 static void
 233 grabkeyboard(void)
 234 {
 235         struct timespec ts = { .tv_sec = 0, .tv_nsec = 1000000  };
 236         int i;
 237
 238         if (embed)
 239                 return;
 240         /* try to grab keyboard, we may have to wait for another process to ungrab */
 241         for (i = 0; i < 1000; i++) {
 242                 if (XGrabKeyboard(dpy, DefaultRootWindow(dpy), True, GrabModeAsync,
 243                                   GrabModeAsync, CurrentTime) == GrabSuccess)
 244                         return;
 245                 nanosleep(&ts, NULL);
 246         }
 247         die("cannot grab keyboard");
 248 }
 249
 250 int
 251 compare_distance(const void *a, const void *b)
 252 {
 253         struct item *da = *(struct item **) a;
 254         struct item *db = *(struct item **) b;
 255
 256         if (!db)
 257                 return 1;
 258         if (!da)
 259                 return -1;
 260
 261         return da->distance == db->distance ? 0 : da->distance < db->distance ? -1 : 1;
 262 }
 263
 264 void
 265 fuzzymatch(void)
 266 {
 267         /* bang - we have so much memory */
 268         struct item *it;
 269         struct item **fuzzymatches = NULL;
 270         char c;
 271         int number_of_matches = 0, i, pidx, sidx, eidx;
 272         int text_len = strlen(text), itext_len;
 273
 274         matches = matchend = NULL;
 275
 276         /* walk through all items */
 277         for (it = items; it && it->text; it++) {
 278                 if (text_len) {
 279                         itext_len = strlen(it->text);
 280                         pidx = 0; /* pointer */
 281                         sidx = eidx = -1; /* start of match, end of match */
 282                         /* walk through item text */
 283                         for (i = 0; i < itext_len && (c = it->text[i]); i++) {
 284                                 /* fuzzy match pattern */
 285                                 if (!fstrncmp(&text[pidx], &c, 1)) {
 286                                         if(sidx == -1)
 287                                                 sidx = i;
 288                                         pidx++;
 289                                         if (pidx == text_len) {
 290                                                 eidx = i;
 291                                                 break;
 292                                         }
 293                                 }
 294                         }
 295                         /* build list of matches */
 296                         if (eidx != -1) {
 297                                 /* compute distance */
 298                                 /* add penalty if match starts late (log(sidx+2))
 299                                  * add penalty for long a match without many matching characters */
 300                                 it->distance = log(sidx + 2) + (double)(eidx - sidx - text_len);
 301                                 /* fprintf(stderr, "distance %s %f\n", it->text, it->distance); */
 302                                 appenditem(it, &matches, &matchend);
 303                                 number_of_matches++;
 304                         }
 305                 } else {
 306                         appenditem(it, &matches, &matchend);
 307                 }
 308         }
 309
 310         if (number_of_matches) {
 311                 /* initialize array with matches */
 312                 if (!(fuzzymatches = realloc(fuzzymatches, number_of_matches * sizeof(struct item*))))
 313                         die("cannot realloc %u bytes:", number_of_matches * sizeof(struct item*));
 314                 for (i = 0, it = matches; it && i < number_of_matches; i++, it = it->right) {
 315                         fuzzymatches[i] = it;
 316                 }
 317                 /* sort matches according to distance */
 318                 qsort(fuzzymatches, number_of_matches, sizeof(struct item*), compare_distance);
 319                 /* rebuild list of matches */
 320                 matches = matchend = NULL;
 321                 for (i = 0, it = fuzzymatches[i];  i < number_of_matches && it && \
 322                                 it->text; i++, it = fuzzymatches[i]) {
 323                         appenditem(it, &matches, &matchend);
 324                 }
 325                 free(fuzzymatches);
 326         }
 327         curr = sel = matches;
 328         calcoffsets();
 329 }
 330
 331 static void
 332 match(void)
 333 {
 334         if (fuzzy) {
 335                 fuzzymatch();
 336                 return;
 337         }
 338         static char **tokv = NULL;
 339         static int tokn = 0;
 340
 341         char buf[sizeof text], *s;
 342         int i, tokc = 0;
 343         size_t len, textsize;
 344         struct item *item, *lprefix, *lsubstr, *prefixend, *substrend;
 345
 346         strcpy(buf, text);
 347         /* separate input text into tokens to be matched individually */
 348         for (s = strtok(buf, " "); s; tokv[tokc - 1] = s, s = strtok(NULL, " "))
 349                 if (++tokc > tokn && !(tokv = realloc(tokv, ++tokn * sizeof *tokv)))
 350                         die("cannot realloc %zu bytes:", tokn * sizeof *tokv);
 351         len = tokc ? strlen(tokv[0]) : 0;
 352
 353         matches = lprefix = lsubstr = matchend = prefixend = substrend = NULL;
 354         textsize = strlen(text) + 1;
 355         for (item = items; item && item->text; item++) {
 356                 for (i = 0; i < tokc; i++)
 357                         if (!fstrstr(item->text, tokv[i]))
 358                                 break;
 359                 if (i != tokc) /* not all tokens match */
 360                         continue;
 361                 /* exact matches go first, then prefixes, then substrings */
 362                 if (!tokc || !fstrncmp(text, item->text, textsize))
 363                         appenditem(item, &matches, &matchend);
 364                 else if (!fstrncmp(tokv[0], item->text, len))
 365                         appenditem(item, &lprefix, &prefixend);
 366                 else
 367                         appenditem(item, &lsubstr, &substrend);
 368         }
 369         if (lprefix) {
 370                 if (matches) {
 371                         matchend->right = lprefix;
 372                         lprefix->left = matchend;
 373                 } else
 374                         matches = lprefix;
 375                 matchend = prefixend;
 376         }
 377         if (lsubstr) {
 378                 if (matches) {
 379                         matchend->right = lsubstr;
 380                         lsubstr->left = matchend;
 381                 } else
 382                         matches = lsubstr;
 383                 matchend = substrend;
 384         }
 385         curr = sel = matches;
 386         calcoffsets();
 387 }
 388
 389 static void
 390 insert(const char *str, ssize_t n)
 391 {
 392         if (strlen(text) + n > sizeof text - 1)
 393                 return;
 394         /* move existing text out of the way, insert new text, and update cursor */
 395         memmove(&text[cursor + n], &text[cursor], sizeof text - cursor - MAX(n, 0));
 396         if (n > 0)
 397                 memcpy(&text[cursor], str, n);
 398         cursor += n;
 399         match();
 400 }
 401
 402 static size_t
 403 nextrune(int inc)
 404 {
 405         ssize_t n;
 406
 407         /* return location of next utf8 rune in the given direction (+1 or -1) */
 408         for (n = cursor + inc; n + inc >= 0 && (text[n] & 0xc0) == 0x80; n += inc)
 409                 ;
 410         return n;
 411 }
 412
 413 static void
 414 movewordedge(int dir)
 415 {
 416         if (dir < 0) { /* move cursor to the start of the word*/
 417                 while (cursor > 0 && strchr(worddelimiters, text[nextrune(-1)]))
 418                         cursor = nextrune(-1);
 419                 while (cursor > 0 && !strchr(worddelimiters, text[nextrune(-1)]))
 420                         cursor = nextrune(-1);
 421         } else { /* move cursor to the end of the word */
 422                 while (text[cursor] && strchr(worddelimiters, text[cursor]))
 423                         cursor = nextrune(+1);
 424                 while (text[cursor] && !strchr(worddelimiters, text[cursor]))
 425                         cursor = nextrune(+1);
 426         }
 427 }
 428
 429 static void
 430 keypress(XKeyEvent *ev)
 431 {
 432         char buf[32];
 433         int len;
 434         KeySym ksym;
 435         Status status;
 436
 437         len = XmbLookupString(xic, ev, buf, sizeof buf, &ksym, &status);
 438         switch (status) {
 439         default: /* XLookupNone, XBufferOverflow */
 440                 return;
 441         case XLookupChars:
 442                 goto insert;
 443         case XLookupKeySym:
 444         case XLookupBoth:
 445                 break;
 446         }
 447
 448         if (ev->state & ControlMask) {
 449                 switch(ksym) {
 450                 case XK_a: ksym = XK_Home;      break;
 451                 case XK_b: ksym = XK_Left;      break;
 452                 case XK_c: ksym = XK_Escape;    break;
 453                 case XK_d: ksym = XK_Delete;    break;
 454                 case XK_e: ksym = XK_End;       break;
 455                 case XK_f: ksym = XK_Right;     break;
 456                 case XK_g: ksym = XK_Escape;    break;
 457                 case XK_h: ksym = XK_BackSpace; break;
 458                 case XK_i: ksym = XK_Tab;       break;
 459                 case XK_j: /* fallthrough */
 460                 case XK_J: /* fallthrough */
 461                 case XK_m: /* fallthrough */
 462                 case XK_M: ksym = XK_Return; ev->state &= ~ControlMask; break;
 463                 case XK_n: ksym = XK_Down;      break;
 464                 case XK_p: ksym = XK_Up;        break;
 465
 466                 case XK_k: /* delete right */
 467                         text[cursor] = '\0';
 468                         match();
 469                         break;
 470                 case XK_u: /* delete left */
 471                         insert(NULL, 0 - cursor);
 472                         break;
 473                 case XK_w: /* delete word */
 474                         while (cursor > 0 && strchr(worddelimiters, text[nextrune(-1)]))
 475                                 insert(NULL, nextrune(-1) - cursor);
 476                         while (cursor > 0 && !strchr(worddelimiters, text[nextrune(-1)]))
 477                                 insert(NULL, nextrune(-1) - cursor);
 478                         break;
 479                 case XK_y: /* paste selection */
 480                 case XK_Y:
 481                         XConvertSelection(dpy, (ev->state & ShiftMask) ? clip : XA_PRIMARY,
 482                                           utf8, utf8, win, CurrentTime);
 483                         return;
 484                 case XK_Left:
 485                 case XK_KP_Left:
 486                         movewordedge(-1);
 487                         goto draw;
 488                 case XK_Right:
 489                 case XK_KP_Right:
 490                         movewordedge(+1);
 491                         goto draw;
 492                 case XK_Return:
 493                 case XK_KP_Enter:
 494                         break;
 495                 case XK_bracketleft:
 496                         cleanup();
 497                         exit(1);
 498                 default:
 499                         return;
 500                 }
 501         } else if (ev->state & Mod1Mask) {
 502                 switch(ksym) {
 503                 case XK_b:
 504                         movewordedge(-1);
 505                         goto draw;
 506                 case XK_f:
 507                         movewordedge(+1);
 508                         goto draw;
 509                 case XK_g: ksym = XK_Home;  break;
 510                 case XK_G: ksym = XK_End;   break;
 511                 case XK_h: ksym = XK_Up;    break;
 512                 case XK_j: ksym = XK_Next;  break;
 513                 case XK_k: ksym = XK_Prior; break;
 514                 case XK_l: ksym = XK_Down;  break;
 515                 default:
 516                         return;
 517                 }
 518         }
 519
 520         switch(ksym) {
 521         default:
 522 insert:
 523                 if (!iscntrl((unsigned char)*buf))
 524                         insert(buf, len);
 525                 break;
 526         case XK_Delete:
 527         case XK_KP_Delete:
 528                 if (text[cursor] == '\0')
 529                         return;
 530                 cursor = nextrune(+1);
 531                 /* fallthrough */
 532         case XK_BackSpace:
 533                 if (cursor == 0)
 534                         return;
 535                 insert(NULL, nextrune(-1) - cursor);
 536                 break;
 537         case XK_End:
 538         case XK_KP_End:
 539                 if (text[cursor] != '\0') {
 540                         cursor = strlen(text);
 541                         break;
 542                 }
 543                 if (next) {
 544                         /* jump to end of list and position items in reverse */
 545                         curr = matchend;
 546                         calcoffsets();
 547                         curr = prev;
 548                         calcoffsets();
 549                         while (next && (curr = curr->right))
 550                                 calcoffsets();
 551                 }
 552                 sel = matchend;
 553                 break;
 554         case XK_Escape:
 555                 cleanup();
 556                 exit(1);
 557         case XK_Home:
 558         case XK_KP_Home:
 559                 if (sel == matches) {
 560                         cursor = 0;
 561                         break;
 562                 }
 563                 sel = curr = matches;
 564                 calcoffsets();
 565                 break;
 566         case XK_Left:
 567         case XK_KP_Left:
 568                 if (cursor > 0 && (!sel || !sel->left || lines > 0)) {
 569                         cursor = nextrune(-1);
 570                         break;
 571                 }
 572                 if (lines > 0)
 573                         return;
 574                 /* fallthrough */
 575         case XK_Up:
 576         case XK_KP_Up:
 577                 if (sel && sel->left && (sel = sel->left)->right == curr) {
 578                         curr = prev;
 579                         calcoffsets();
 580                 }
 581                 break;
 582         case XK_Next:
 583         case XK_KP_Next:
 584                 if (!next)
 585                         return;
 586                 sel = curr = next;
 587                 calcoffsets();
 588                 break;
 589         case XK_Prior:
 590         case XK_KP_Prior:
 591                 if (!prev)
 592                         return;
 593                 sel = curr = prev;
 594                 calcoffsets();
 595                 break;
 596         case XK_Return:
 597         case XK_KP_Enter:
 598                 puts((sel && !(ev->state & ShiftMask)) ? sel->text : text);
 599                 if (!(ev->state & ControlMask)) {
 600                         cleanup();
 601                         exit(0);
 602                 }
 603                 if (sel)
 604                         sel->out = 1;
 605                 break;
 606         case XK_Right:
 607         case XK_KP_Right:
 608                 if (text[cursor] != '\0') {
 609                         cursor = nextrune(+1);
 610                         break;
 611                 }
 612                 if (lines > 0)
 613                         return;
 614                 /* fallthrough */
 615         case XK_Down:
 616         case XK_KP_Down:
 617                 if (sel && sel->right && (sel = sel->right) == next) {
 618                         curr = next;
 619                         calcoffsets();
 620                 }
 621                 break;
 622         case XK_Tab:
 623                 if (!sel)
 624                         return;
 625                 strncpy(text, sel->text, sizeof text - 1);
 626                 text[sizeof text - 1] = '\0';
 627                 cursor = strlen(text);
 628                 match();
 629                 break;
 630         }
 631
 632 draw:
 633         drawmenu();
 634 }
 635
 636 static void
 637 buttonpress(XEvent *e)
 638 {
 639         struct item *item;
 640         XButtonPressedEvent *ev = &e->xbutton;
 641         int x = 0, y = 0, h = bh, w;
 642
 643         if (ev->window != win)
 644                 return;
 645
 646         /* right-click: exit */
 647         if (ev->button == Button3)
 648                 exit(1);
 649
 650         if (prompt && *prompt)
 651                 x += promptw;
 652
 653         /* input field */
 654         w = (lines > 0 || !matches) ? mw - x : inputw;
 655
 656         /* left-click on input: clear input,
 657          * NOTE: if there is no left-arrow the space for < is reserved so
 658          *       add that to the input width */
 659         if (ev->button == Button1 &&
 660            ((lines <= 0 && ev->x >= 0 && ev->x <= x + w +
 661            ((!prev || !curr->left) ? TEXTW("<") : 0)) ||
 662            (lines > 0 && ev->y >= y && ev->y <= y + h))) {
 663                 insert(NULL, -cursor);
 664                 drawmenu();
 665                 return;
 666         }
 667         /* middle-mouse click: paste selection */
 668         if (ev->button == Button2) {
 669                 XConvertSelection(dpy, (ev->state & ShiftMask) ? clip : XA_PRIMARY,
 670                                   utf8, utf8, win, CurrentTime);
 671                 drawmenu();
 672                 return;
 673         }
 674         /* scroll up */
 675         if (ev->button == Button4 && prev) {
 676                 sel = curr = prev;
 677                 calcoffsets();
 678                 drawmenu();
 679                 return;
 680         }
 681         /* scroll down */
 682         if (ev->button == Button5 && next) {
 683                 sel = curr = next;
 684                 calcoffsets();
 685                 drawmenu();
 686                 return;
 687         }
 688         if (ev->button != Button1)
 689                 return;
 690         if (ev->state & ~ControlMask)
 691                 return;
 692         if (lines > 0) {
 693                 /* vertical list: (ctrl)left-click on item */
 694                 w = mw - x;
 695                 for (item = curr; item != next; item = item->right) {
 696                         y += h;
 697                         if (ev->y >= y && ev->y <= (y + h)) {
 698                                 puts(item->text);
 699                                 if (!(ev->state & ControlMask))
 700                                         exit(0);
 701                                 sel = item;
 702                                 if (sel) {
 703                                         sel->out = 1;
 704                                         drawmenu();
 705                                 }
 706                                 return;
 707                         }
 708                 }
 709         } else if (matches) {
 710                 /* left-click on left arrow */
 711                 x += inputw;
 712                 w = TEXTW("<");
 713                 if (prev && curr->left) {
 714                         if (ev->x >= x && ev->x <= x + w) {
 715                                 sel = curr = prev;
 716                                 calcoffsets();
 717                                 drawmenu();
 718                                 return;
 719                         }
 720                 }
 721                 /* horizontal list: (ctrl)left-click on item */
 722                 for (item = curr; item != next; item = item->right) {
 723                         x += w;
 724                         w = MIN(TEXTW(item->text), mw - x - TEXTW(">"));
 725                         if (ev->x >= x && ev->x <= x + w) {
 726                                 puts(item->text);
 727                                 if (!(ev->state & ControlMask))
 728                                         exit(0);
 729                                 sel = item;
 730                                 if (sel) {
 731                                         sel->out = 1;
 732                                         drawmenu();
 733                                 }
 734                                 return;
 735                         }
 736                 }
 737                 /* left-click on right arrow */
 738                 w = TEXTW(">");
 739                 x = mw - w;
 740                 if (next && ev->x >= x && ev->x <= x + w) {
 741                         sel = curr = next;
 742                         calcoffsets();
 743                         drawmenu();
 744                         return;
 745                 }
 746         }
 747 }
 748
 749 static void
 750 paste(void)
 751 {
 752         char *p, *q;
 753         int di;
 754         unsigned long dl;
 755         Atom da;
 756
 757         /* we have been given the current selection, now insert it into input */
 758         if (XGetWindowProperty(dpy, win, utf8, 0, (sizeof text / 4) + 1, False,
 759                            utf8, &da, &di, &dl, &dl, (unsigned char **)&p)
 760             == Success && p) {
 761                 insert(p, (q = strchr(p, '\n')) ? q - p : (ssize_t)strlen(p));
 762                 XFree(p);
 763         }
 764         drawmenu();
 765 }
 766
 767 static void
 768 readstdin(void)
 769 {
 770         char buf[sizeof text], *p;
 771         size_t i, size = 0;
 772
 773         /* read each line from stdin and add it to the item list */
 774         for (i = 0; fgets(buf, sizeof buf, stdin); i++) {
 775                 if (i + 1 >= size / sizeof *items)
 776                         if (!(items = realloc(items, (size += BUFSIZ))))
 777                                 die("cannot realloc %zu bytes:", size);
 778                 if ((p = strchr(buf, '\n')))
 779                         *p = '\0';
 780                 if (!(items[i].text = strdup(buf)))
 781                         die("cannot strdup %zu bytes:", strlen(buf) + 1);
 782                 items[i].out = 0;
 783         }
 784         if (items)
 785                 items[i].text = NULL;
 786         lines = MIN(lines, i);
 787 }
 788
 789 static void
 790 run(void)
 791 {
 792         XEvent ev;
 793
 794         while (!XNextEvent(dpy, &ev)) {
 795                 if (XFilterEvent(&ev, win))
 796                         continue;
 797                 switch(ev.type) {
 798                 case DestroyNotify:
 799                         if (ev.xdestroywindow.window != win)
 800                                 break;
 801                         cleanup();
 802                         exit(1);
 803                 case ButtonPress:
 804                         buttonpress(&ev);
 805                         break;
 806                 case Expose:
 807                         if (ev.xexpose.count == 0)
 808                                 drw_map(drw, win, 0, 0, mw, mh);
 809                         break;
 810                 case FocusIn:
 811                         /* regrab focus from parent window */
 812                         if (ev.xfocus.window != win)
 813                                 grabfocus();
 814                         break;
 815                 case KeyPress:
 816                         keypress(&ev.xkey);
 817                         break;
 818                 case SelectionNotify:
 819                         if (ev.xselection.property == utf8)
 820                                 paste();
 821                         break;
 822                 case VisibilityNotify:
 823                         if (ev.xvisibility.state != VisibilityUnobscured)
 824                                 XRaiseWindow(dpy, win);
 825                         break;
 826                 }
 827         }
 828 }
 829
 830 static void
 831 setup(void)
 832 {
 833         int x, y, i, j;
 834         unsigned int du, tmp;
 835         XSetWindowAttributes swa;
 836         XIM xim;
 837         Window w, dw, *dws;
 838         XWindowAttributes wa;
 839         XClassHint ch = {"dmenu", "dmenu"};
 840         struct item *item;
 841 #ifdef XINERAMA
 842         XineramaScreenInfo *info;
 843         Window pw;
 844         int a, di, n, area = 0;
 845 #endif
 846         /* init appearance */
 847         for (j = 0; j < SchemeLast; j++)
 848                 scheme[j] = drw_scm_create(drw, colors[j], alphas[j], 2);
 849
 850         clip = XInternAtom(dpy, "CLIPBOARD",   False);
 851         utf8 = XInternAtom(dpy, "UTF8_STRING", False);
 852
 853         /* calculate menu geometry */
 854         bh = drw->fonts->h + 2;
 855         lines = MAX(lines, 0);
 856         mh = (lines + 1) * bh;
 857         promptw = (prompt && *prompt) ? TEXTW(prompt) - lrpad / 4 : 0;
 858 #ifdef XINERAMA
 859         i = 0;
 860         if (parentwin == root && (info = XineramaQueryScreens(dpy, &n))) {
 861                 XGetInputFocus(dpy, &w, &di);
 862                 if (mon >= 0 && mon < n)
 863                         i = mon;
 864                 else if (w != root && w != PointerRoot && w != None) {
 865                         /* find top-level window containing current input focus */
 866                         do {
 867                                 if (XQueryTree(dpy, (pw = w), &dw, &w, &dws, &du) && dws)
 868                                         XFree(dws);
 869                         } while (w != root && w != pw);
 870                         /* find xinerama screen with which the window intersects most */
 871                         if (XGetWindowAttributes(dpy, pw, &wa))
 872                                 for (j = 0; j < n; j++)
 873                                         if ((a = INTERSECT(wa.x, wa.y, wa.width, wa.height, info[j])) > area) {
 874                                                 area = a;
 875                                                 i = j;
 876                                         }
 877                 }
 878                 /* no focused window is on screen, so use pointer location instead */
 879                 if (mon < 0 && !area && XQueryPointer(dpy, root, &dw, &dw, &x, &y, &di, &di, &du))
 880                         for (i = 0; i < n; i++)
 881                                 if (INTERSECT(x, y, 1, 1, info[i]) != 0)
 882                                         break;
 883
 884                 if (centered) {
 885                         mw = MIN(MAX(max_textw() + promptw, min_width), info[i].width);
 886                         x = info[i].x_org + ((info[i].width  - mw) / 2);
 887                         y = info[i].y_org + ((info[i].height - mh) / 2);
 888                 } else {
 889                         x = info[i].x_org;
 890                         y = info[i].y_org + (topbar ? 0 : info[i].height - mh);
 891                         mw = info[i].width;
 892                 }
 893
 894                 XFree(info);
 895         } else
 896 #endif
 897         {
 898                 if (!XGetWindowAttributes(dpy, parentwin, &wa))
 899                         die("could not get embedding window attributes: 0x%lx",
 900                             parentwin);
 901
 902                 if (centered) {
 903                         mw = MIN(MAX(max_textw() + promptw, min_width), wa.width);
 904                         x = (wa.width  - mw) / 2;
 905                         y = (wa.height - mh) / 2;
 906                 } else {
 907                         x = 0;
 908                         y = topbar ? 0 : wa.height - mh;
 909                         mw = wa.width;
 910                 }
 911         }
 912         for (item = items; item && item->text; ++item) {
 913                 if ((tmp = textw_clamp(item->text, mw/3)) > inputw) {
 914                         if ((inputw = tmp) == mw/3)
 915                                 break;
 916                 }
 917         }
 918         match();
 919
 920         /* create menu window */
 921         swa.override_redirect = True;
 922         swa.background_pixel = 0;
 923         swa.border_pixel = 0;
 924         swa.colormap = cmap;
 925         swa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask | ButtonPressMask;
 926         win = XCreateWindow(dpy, parentwin, x, y, mw, mh, 0,
 927                             depth, CopyFromParent, visual,
 928                             CWOverrideRedirect | CWBackPixel | CWBorderPixel | CWColormap | CWEventMask, &swa);
 929         XSetClassHint(dpy, win, &ch);
 930
 931
 932         /* input methods */
 933         if ((xim = XOpenIM(dpy, NULL, NULL, NULL)) == NULL)
 934                 die("XOpenIM failed: could not open input device");
 935
 936         xic = XCreateIC(xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
 937                         XNClientWindow, win, XNFocusWindow, win, NULL);
 938
 939         XMapRaised(dpy, win);
 940         if (embed) {
 941                 XSelectInput(dpy, parentwin, FocusChangeMask | SubstructureNotifyMask);
 942                 if (XQueryTree(dpy, parentwin, &dw, &w, &dws, &du) && dws) {
 943                         for (i = 0; i < du && dws[i] != win; ++i)
 944                                 XSelectInput(dpy, dws[i], FocusChangeMask);
 945                         XFree(dws);
 946                 }
 947                 grabfocus();
 948         }
 949         drw_resize(drw, mw, mh);
 950         drawmenu();
 951 }
 952
 953 static void
 954 usage(void)
 955 {
 956         fputs("usage: dmenu [-bfiv] [-l lines] [-p prompt] [-fn font] [-m monitor]\n"
 957               "             [-nb color] [-nf color] [-sb color] [-sf color] [-w windowid]\n", stderr);
 958         exit(1);
 959 }
 960
 961 int
 962 main(int argc, char *argv[])
 963 {
 964         XWindowAttributes wa;
 965         int i, fast = 0;
 966
 967         for (i = 1; i < argc; i++)
 968                 /* these options take no arguments */
 969                 if (!strcmp(argv[i], "-v")) {      /* prints version information */
 970                         puts("dmenu-"VERSION);
 971                         exit(0);
 972                 } else if (!strcmp(argv[i], "-b")) /* appears at the bottom of the screen */
 973                         topbar = 0;
 974                 else if (!strcmp(argv[i], "-f"))   /* grabs keyboard before reading stdin */
 975                         fast = 1;
 976                 else if (!strcmp(argv[i], "-F"))   /* grabs keyboard before reading stdin */
 977                         /* always fuzzy */; // fuzzy = 0;
 978                 else if (!strcmp(argv[i], "-c"))   /* centers dmenu on screen */
 979                         centered = 1;
 980                 else if (!strcmp(argv[i], "-i")) { /* case-insensitive item matching */
 981                         fstrncmp = strncasecmp;
 982                         fstrstr = cistrstr;
 983                 } else if (i + 1 == argc)
 984                         usage();
 985                 /* these options take one argument */
 986                 else if (!strcmp(argv[i], "-l"))   /* number of lines in vertical list */
 987                         lines = atoi(argv[++i]);
 988                 else if (!strcmp(argv[i], "-m"))
 989                         mon = atoi(argv[++i]);
 990                 else if (!strcmp(argv[i], "-p"))   /* adds prompt to left of input field */
 991                         prompt = argv[++i];
 992                 else if (!strcmp(argv[i], "-fn"))  /* font or font set */
 993                         fonts[0] = argv[++i];
 994                 else if (!strcmp(argv[i], "-nb"))  /* normal background color */
 995                         colors[SchemeNorm][ColBg] = argv[++i];
 996                 else if (!strcmp(argv[i], "-nf"))  /* normal foreground color */
 997                         colors[SchemeNorm][ColFg] = argv[++i];
 998                 else if (!strcmp(argv[i], "-sb"))  /* selected background color */
 999                         colors[SchemeSel][ColBg] = argv[++i];
1000                 else if (!strcmp(argv[i], "-sf"))  /* selected foreground color */
1001                         colors[SchemeSel][ColFg] = argv[++i];
1002                 else if (!strcmp(argv[i], "-w"))   /* embedding window id */
1003                         embed = argv[++i];
1004                 else
1005                         usage();
1006
1007         if (!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1008                 fputs("warning: no locale support\n", stderr);
1009         if (!(dpy = XOpenDisplay(NULL)))
1010                 die("cannot open display");
1011         screen = DefaultScreen(dpy);
1012         root = RootWindow(dpy, screen);
1013         if (!embed || !(parentwin = strtol(embed, NULL, 0)))
1014                 parentwin = root;
1015         if (!XGetWindowAttributes(dpy, parentwin, &wa))
1016                 die("could not get embedding window attributes: 0x%lx",
1017                     parentwin);
1018         xinitvisual();
1019         drw = drw_create(dpy, screen, root, wa.width, wa.height, visual, depth, cmap);
1020         if (!drw_fontset_create(drw, fonts, LENGTH(fonts)))
1021                 die("no fonts could be loaded.");
1022         lrpad = drw->fonts->h;
1023
1024 #ifdef __OpenBSD__
1025         if (pledge("stdio rpath", NULL) == -1)
1026                 die("pledge");
1027 #endif
1028
1029         if (fast && !isatty(0)) {
1030                 grabkeyboard();
1031                 readstdin();
1032         } else {
1033                 readstdin();
1034                 grabkeyboard();
1035         }
1036         setup();
1037         run();
1038
1039         return 1; /* unreachable */
1040 }
1041
1042  void
1043 xinitvisual()
1044 {
1045         XVisualInfo *infos;
1046         XRenderPictFormat *fmt;
1047         int nitems;
1048         int i;
1049
1050         XVisualInfo tpl = {
1051                 .screen = screen,
1052                 .depth = 32,
1053                 .class = TrueColor
1054         };
1055         long masks = VisualScreenMask | VisualDepthMask | VisualClassMask;
1056
1057         infos = XGetVisualInfo(dpy, masks, &tpl, &nitems);
1058         visual = NULL;
1059         for(i = 0; i < nitems; i ++) {
1060                 fmt = XRenderFindVisualFormat(dpy, infos[i].visual);
1061                 if (fmt->type == PictTypeDirect && fmt->direct.alphaMask) {
1062                         visual = infos[i].visual;
1063                         depth = infos[i].depth;
1064                         cmap = XCreateColormap(dpy, root, visual, AllocNone);
1065                         useargb = 1;
1066                         break;
1067                 }
1068         }
1069
1070         XFree(infos);
1071
1072         if (! visual) {
1073                 visual = DefaultVisual(dpy, screen);
1074                 depth = DefaultDepth(dpy, screen);
1075                 cmap = DefaultColormap(dpy, screen);
1076         }
1077 }