dmenu.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include <ctype.h>
   3 #include <locale.h>
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <string.h>
   7 #include <unistd.h>
   8 #include <X11/keysym.h>
   9 #include <X11/Xlib.h>
  10 #include <X11/Xutil.h>
  11 #ifdef XINERAMA
  12 #include <X11/extensions/Xinerama.h>
  13 #endif
  14 #include <draw.h>
  15
  16 /* macros */
  17 #define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
  18 #define MIN(a, b)               ((a) < (b) ? (a) : (b))
  19 #define MAX(a, b)               ((a) > (b) ? (a) : (b))
  20 #define IS_UTF8_1ST_CHAR(c)     ((((c) & 0xc0) == 0xc0) || !((c) & 0x80))
  21
  22 typedef struct Item Item;
  23 struct Item {
  24         char *text;
  25         Item *next;         /* traverses all items */
  26         Item *left, *right; /* traverses items matching current search pattern */
  27 };
  28
  29 /* forward declarations */
  30 static void appenditem(Item *i, Item **list, Item **last);
  31 static void calcoffsetsh(void);
  32 static void calcoffsetsv(void);
  33 static char *cistrstr(const char *s, const char *sub);
  34 static void cleanup(void);
  35 static void dinput(void);
  36 static void drawmenu(void);
  37 static void drawmenuh(void);
  38 static void drawmenuv(void);
  39 static Bool grabkeyboard(void);
  40 static void kpress(XKeyEvent *e);
  41 static void match(char *pattern);
  42 static void readstdin(void);
  43 static void run(void);
  44 static void setup(void);
  45
  46 #include "config.h"
  47
  48 /* variables */
  49 static char **argp = NULL;
  50 static char *maxname = NULL;
  51 static char *prompt = NULL;
  52 static char text[4096];
  53 static int cmdw = 0;
  54 static int promptw = 0;
  55 static int ret = 0;
  56 static int screen;
  57 static unsigned int lines = 0;
  58 static unsigned int numlockmask = 0;
  59 static unsigned int mw, mh;
  60 static unsigned long normcol[ColLast];
  61 static unsigned long selcol[ColLast];
  62 static Bool running = True;
  63 static Bool topbar = True;
  64 static DC dc;
  65 static Display *dpy;
  66 static Item *allitems = NULL;  /* first of all items */
  67 static Item *item = NULL;      /* first of pattern matching items */
  68 static Item *sel = NULL;
  69 static Item *next = NULL;
  70 static Item *prev = NULL;
  71 static Item *curr = NULL;
  72 static Window win, root;
  73 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
  74 static char *(*fstrstr)(const char *, const char *) = strstr;
  75 static void (*calcoffsets)(void) = calcoffsetsh;
  76
  77 void
  78 appenditem(Item *i, Item **list, Item **last) {
  79         if(!(*last))
  80                 *list = i;
  81         else
  82                 (*last)->right = i;
  83         i->left = *last;
  84         i->right = NULL;
  85         *last = i;
  86 }
  87
  88 void
  89 calcoffsetsh(void) {
  90         unsigned int w;
  91
  92         w = promptw + cmdw + (2 * spaceitem);
  93         for(next = curr; next; next = next->right)
  94                 if((w += MIN(textw(&dc, next->text), mw / 3)) > mw)
  95                         break;
  96         w = promptw + cmdw + (2 * spaceitem);
  97         for(prev = curr; prev && prev->left; prev = prev->left)
  98                 if((w += MIN(textw(&dc, prev->left->text), mw / 3)) > mw)
  99                         break;
 100 }
 101
 102 void
 103 calcoffsetsv(void) {
 104         unsigned int i;
 105
 106         next = prev = curr;
 107         for(i = 0; i < lines && next; i++)
 108                 next = next->right;
 109         mh = (dc.font.height + 2) * (i + 1);
 110         for(i = 0; i < lines && prev && prev->left; i++)
 111                 prev = prev->left;
 112 }
 113
 114 char *
 115 cistrstr(const char *s, const char *sub) {
 116         int c, csub;
 117         unsigned int len;
 118
 119         if(!sub)
 120                 return (char *)s;
 121         if((c = tolower(*sub++)) != '\0') {
 122                 len = strlen(sub);
 123                 do {
 124                         do {
 125                                 if((csub = *s++) == '\0')
 126                                         return NULL;
 127                         }
 128                         while(tolower(csub) != c);
 129                 }
 130                 while(strncasecmp(s, sub, len) != 0);
 131                 s--;
 132         }
 133         return (char *)s;
 134 }
 135
 136 void
 137 cleanup(void) {
 138         Item *itm;
 139
 140         while(allitems) {
 141                 itm = allitems->next;
 142                 free(allitems->text);
 143                 free(allitems);
 144                 allitems = itm;
 145         }
 146         cleanupdraw(&dc);
 147         XDestroyWindow(dpy, win);
 148         XUngrabKeyboard(dpy, CurrentTime);
 149 }
 150
 151 void
 152 dinput(void) {
 153         cleanup();
 154         argp[0] = "dinput";
 155         argp[1] = text;
 156         execvp("dinput", argp);
 157         eprint("cannot exec dinput\n");
 158 }
 159
 160 void
 161 drawmenu(void) {
 162         dc.x = 0;
 163         dc.y = 0;
 164         dc.w = mw;
 165         dc.h = mh;
 166         drawtext(&dc, NULL, normcol, False);
 167         dc.h = dc.font.height + 2;
 168         dc.y = topbar ? 0 : mh - dc.h;
 169         /* print prompt? */
 170         if(prompt) {
 171                 dc.w = promptw;
 172                 drawtext(&dc, prompt, selcol, False);
 173                 dc.x += dc.w;
 174         }
 175         dc.w = mw - dc.x;
 176         /* print command */
 177         if(cmdw && item && lines == 0)
 178                 dc.w = cmdw;
 179         drawtext(&dc, *text ? text : NULL, normcol, False);
 180         if(lines > 0)
 181                 drawmenuv();
 182         else if(curr)
 183                 drawmenuh();
 184         XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
 185         XFlush(dpy);
 186 }
 187
 188 void
 189 drawmenuh(void) {
 190         Item *i;
 191
 192         dc.x += cmdw;
 193         dc.w = spaceitem;
 194         drawtext(&dc, curr->left ? "<" : NULL, normcol, False);
 195         dc.x += dc.w;
 196         for(i = curr; i != next; i = i->right) {
 197                 dc.w = MIN(textw(&dc, i->text), mw / 3);
 198                 drawtext(&dc, i->text, (sel == i) ? selcol : normcol, False);
 199                 dc.x += dc.w;
 200         }
 201         dc.w = spaceitem;
 202         dc.x = mw - dc.w;
 203         drawtext(&dc, next ? ">" : NULL, normcol, False);
 204 }
 205
 206 void
 207 drawmenuv(void) {
 208         Item *i;
 209         XWindowAttributes wa;
 210
 211         dc.y = topbar ? dc.h : 0;
 212         dc.w = mw - dc.x;
 213         for(i = curr; i != next; i = i->right) {
 214                 drawtext(&dc, i->text, (sel == i) ? selcol : normcol, False);
 215                 dc.y += dc.h;
 216         }
 217         if(!XGetWindowAttributes(dpy, win, &wa))
 218                 eprint("cannot get window attributes");
 219         XMoveResizeWindow(dpy, win, wa.x, wa.y + (topbar ? 0 : wa.height - mh), mw, mh);
 220 }
 221
 222 Bool
 223 grabkeyboard(void) {
 224         unsigned int len;
 225
 226         for(len = 1000; len; len--) {
 227                 if(XGrabKeyboard(dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime)
 228                 == GrabSuccess)
 229                         break;
 230                 usleep(1000);
 231         }
 232         return len > 0;
 233 }
 234
 235 void
 236 kpress(XKeyEvent *e) {
 237         char buf[sizeof text];
 238         int num;
 239         unsigned int i, len;
 240         KeySym ksym;
 241
 242         len = strlen(text);
 243         num = XLookupString(e, buf, sizeof buf, &ksym, NULL);
 244         if(ksym == XK_KP_Enter)
 245                 ksym = XK_Return;
 246         else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
 247                 ksym = (ksym - XK_KP_0) + XK_0;
 248         else if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
 249         || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
 250         || IsPrivateKeypadKey(ksym))
 251                 return;
 252         /* first check if a control mask is omitted */
 253         if(e->state & ControlMask) {
 254                 switch(tolower(ksym)) {
 255                 default:
 256                         return;
 257                 case XK_a:
 258                         ksym = XK_Home;
 259                         break;
 260                 case XK_b:
 261                         ksym = XK_Left;
 262                         break;
 263                 case XK_c:
 264                         ksym = XK_Escape;
 265                         break;
 266                 case XK_e:
 267                         ksym = XK_End;
 268                         break;
 269                 case XK_f:
 270                         ksym = XK_Right;
 271                         break;
 272                 case XK_h:
 273                         ksym = XK_BackSpace;
 274                         break;
 275                 case XK_i:
 276                         ksym = XK_Tab;
 277                         break;
 278                 case XK_j:
 279                 case XK_m:
 280                         ksym = XK_Return;
 281                         break;
 282                 case XK_n:
 283                         ksym = XK_Down;
 284                         break;
 285                 case XK_p:
 286                         ksym = XK_Up;
 287                         break;
 288                 case XK_u:
 289                         text[0] = '\0';
 290                         match(text);
 291                         break;
 292                 case XK_w:
 293                         if(len == 0)
 294                                 return;
 295                         i = len;
 296                         while(i-- > 0 && text[i] == ' ');
 297                         while(i-- > 0 && text[i] != ' ');
 298                         text[++i] = '\0';
 299                         match(text);
 300                         break;
 301                 }
 302         }
 303         switch(ksym) {
 304         default:
 305                 num = MIN(num, sizeof text);
 306                 if(num && !iscntrl((int) buf[0])) {
 307                         memcpy(text + len, buf, num + 1);
 308                         len += num;
 309                         match(text);
 310                 }
 311                 break;
 312         case XK_BackSpace:
 313                 if(len == 0)
 314                         return;
 315                 for(i = 1; len - i > 0 && !IS_UTF8_1ST_CHAR(text[len - i]); i++);
 316                 len -= i;
 317                 text[len] = '\0';
 318                 match(text);
 319                 break;
 320         case XK_End:
 321                 while(next) {
 322                         sel = curr = next;
 323                         calcoffsets();
 324                 }
 325                 while(sel && sel->right)
 326                         sel = sel->right;
 327                 break;
 328         case XK_Escape:
 329                 ret = 1;
 330                 running = False;
 331                 return;
 332         case XK_Home:
 333                 sel = curr = item;
 334                 calcoffsets();
 335                 break;
 336         case XK_Left:
 337         case XK_Up:
 338                 if(!sel || !sel->left)
 339                         return;
 340                 sel = sel->left;
 341                 if(sel->right == curr) {
 342                         curr = prev;
 343                         calcoffsets();
 344                 }
 345                 break;
 346         case XK_Next:
 347                 if(!next)
 348                         return;
 349                 sel = curr = next;
 350                 calcoffsets();
 351                 break;
 352         case XK_Prior:
 353                 if(!prev)
 354                         return;
 355                 sel = curr = prev;
 356                 calcoffsets();
 357                 break;
 358         case XK_Return:
 359                 if(e->state & ShiftMask)
 360                         dinput();
 361                 fprintf(stdout, "%s", sel ? sel->text : text);
 362                 fflush(stdout);
 363                 running = False;
 364                 return;
 365         case XK_Right:
 366         case XK_Down:
 367                 if(!sel || !sel->right)
 368                         return;
 369                 sel = sel->right;
 370                 if(sel == next) {
 371                         curr = next;
 372                         calcoffsets();
 373                 }
 374                 break;
 375         case XK_Tab:
 376                 if(sel)
 377                         strncpy(text, sel->text, sizeof text);
 378                 dinput();
 379                 break;
 380         }
 381         drawmenu();
 382 }
 383
 384 void
 385 match(char *pattern) {
 386         unsigned int plen;
 387         Item *i, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
 388
 389         if(!pattern)
 390                 return;
 391         plen = strlen(pattern);
 392         item = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
 393         for(i = allitems; i; i = i->next)
 394                 if(!fstrncmp(pattern, i->text, plen + 1))
 395                         appenditem(i, &lexact, &exactend);
 396                 else if(!fstrncmp(pattern, i->text, plen))
 397                         appenditem(i, &lprefix, &prefixend);
 398                 else if(fstrstr(i->text, pattern))
 399                         appenditem(i, &lsubstr, &substrend);
 400         if(lexact) {
 401                 item = lexact;
 402                 itemend = exactend;
 403         }
 404         if(lprefix) {
 405                 if(itemend) {
 406                         itemend->right = lprefix;
 407                         lprefix->left = itemend;
 408                 }
 409                 else
 410                         item = lprefix;
 411                 itemend = prefixend;
 412         }
 413         if(lsubstr) {
 414                 if(itemend) {
 415                         itemend->right = lsubstr;
 416                         lsubstr->left = itemend;
 417                 }
 418                 else
 419                         item = lsubstr;
 420         }
 421         curr = prev = next = sel = item;
 422         calcoffsets();
 423 }
 424
 425 void
 426 readstdin(void) {
 427         char *p, buf[sizeof text];
 428         unsigned int len = 0, max = 0;
 429         Item *i, *new;
 430
 431         i = NULL;
 432         while(fgets(buf, sizeof buf, stdin)) {
 433                 len = strlen(buf);
 434                 if(buf[len-1] == '\n')
 435                         buf[--len] = '\0';
 436                 if(!(p = strdup(buf)))
 437                         eprint("cannot strdup %u bytes\n", len);
 438                 if((max = MAX(max, len)) == len)
 439                         maxname = p;
 440                 if(!(new = malloc(sizeof *new)))
 441                         eprint("cannot malloc %u bytes\n", sizeof *new);
 442                 new->next = new->left = new->right = NULL;
 443                 new->text = p;
 444                 if(!i)
 445                         allitems = new;
 446                 else
 447                         i->next = new;
 448                 i = new;
 449         }
 450 }
 451
 452 void
 453 run(void) {
 454         XEvent ev;
 455
 456         /* main event loop */
 457         while(running && !XNextEvent(dpy, &ev))
 458                 switch(ev.type) {
 459                 case KeyPress:
 460                         kpress(&ev.xkey);
 461                         break;
 462                 case Expose:
 463                         if(ev.xexpose.count == 0)
 464                                 drawmenu();
 465                         break;
 466                 case VisibilityNotify:
 467                         if (ev.xvisibility.state != VisibilityUnobscured)
 468                                 XRaiseWindow(dpy, win);
 469                         break;
 470                 }
 471 }
 472
 473 void
 474 setup(void) {
 475         int i, j, x, y;
 476 #if XINERAMA
 477         int n;
 478         XineramaScreenInfo *info = NULL;
 479 #endif
 480         XModifierKeymap *modmap;
 481         XSetWindowAttributes wa;
 482
 483         /* init modifier map */
 484         modmap = XGetModifierMapping(dpy);
 485         for(i = 0; i < 8; i++)
 486                 for(j = 0; j < modmap->max_keypermod; j++) {
 487                         if(modmap->modifiermap[i * modmap->max_keypermod + j]
 488                         == XKeysymToKeycode(dpy, XK_Num_Lock))
 489                                 numlockmask = (1 << i);
 490                 }
 491         XFreeModifiermap(modmap);
 492
 493         dc.dpy = dpy;
 494         normcol[ColBG] = getcolor(&dc, normbgcolor);
 495         normcol[ColFG] = getcolor(&dc, normfgcolor);
 496         selcol[ColBG] = getcolor(&dc, selbgcolor);
 497         selcol[ColFG] = getcolor(&dc, selfgcolor);
 498         initfont(&dc, font);
 499
 500         /* menu window */
 501         wa.override_redirect = True;
 502         wa.background_pixmap = ParentRelative;
 503         wa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
 504
 505         /* menu window geometry */
 506         mh = (dc.font.height + 2) * (lines + 1);
 507 #if XINERAMA
 508         if(XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
 509                 i = 0;
 510                 if(n > 1) {
 511                         int di;
 512                         unsigned int dui;
 513                         Window dummy;
 514                         if(XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui))
 515                                 for(i = 0; i < n; i++)
 516                                         if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
 517                                                 break;
 518                 }
 519                 x = info[i].x_org;
 520                 y = topbar ? info[i].y_org : info[i].y_org + info[i].height - mh;
 521                 mw = info[i].width;
 522                 XFree(info);
 523         }
 524         else
 525 #endif
 526         {
 527                 x = 0;
 528                 y = topbar ? 0 : mh - DisplayHeight(dpy, screen);
 529                 mw = DisplayWidth(dpy, screen);
 530         }
 531
 532         win = XCreateWindow(dpy, root, x, y, mw, mh, 0,
 533                         DefaultDepth(dpy, screen), CopyFromParent,
 534                         DefaultVisual(dpy, screen),
 535                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 536
 537         setupdraw(&dc, win);
 538         if(maxname)
 539                 cmdw = MIN(textw(&dc, maxname), mw / 3);
 540         if(prompt)
 541                 promptw = MIN(textw(&dc, prompt), mw / 5);
 542         text[0] = '\0';
 543         match(text);
 544         XMapRaised(dpy, win);
 545 }
 546
 547 int
 548 main(int argc, char *argv[]) {
 549         unsigned int i;
 550
 551         /* command line args */
 552         progname = "dmenu";
 553         for(i = 1; i < argc; i++)
 554                 if(!strcmp(argv[i], "-i")) {
 555                         fstrncmp = strncasecmp;
 556                         fstrstr = cistrstr;
 557                 }
 558                 else if(!strcmp(argv[i], "-b"))
 559                         topbar = False;
 560                 else if(!strcmp(argv[i], "-l")) {
 561                         if(++i < argc) lines = atoi(argv[i]);
 562                         if(lines > 0)
 563                                 calcoffsets = calcoffsetsv;
 564                 }
 565                 else if(!strcmp(argv[i], "-fn")) {
 566                         if(++i < argc) font = argv[i];
 567                 }
 568                 else if(!strcmp(argv[i], "-nb")) {
 569                         if(++i < argc) normbgcolor = argv[i];
 570                 }
 571                 else if(!strcmp(argv[i], "-nf")) {
 572                         if(++i < argc) normfgcolor = argv[i];
 573                 }
 574                 else if(!strcmp(argv[i], "-p")) {
 575                         if(++i < argc) prompt = argv[i];
 576                 }
 577                 else if(!strcmp(argv[i], "-sb")) {
 578                         if(++i < argc) selbgcolor = argv[i];
 579                 }
 580                 else if(!strcmp(argv[i], "-sf")) {
 581                         if(++i < argc) selfgcolor = argv[i];
 582                 }
 583                 else if(!strcmp(argv[i], "-v")) {
 584                         printf("dmenu-"VERSION", © 2006-2010 dmenu engineers, see LICENSE for details\n");
 585                         exit(EXIT_SUCCESS);
 586                 }
 587                 else {
 588                         fputs("usage: dmenu [-i] [-b] [-l <lines>] [-fn <font>] [-nb <color>]\n"
 589                                "             [-nf <color>] [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n", stderr);
 590                         exit(EXIT_FAILURE);
 591                 }
 592         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 593                 fprintf(stderr, "dmenu: warning: no locale support\n");
 594         if(!(dpy = XOpenDisplay(NULL)))
 595                 eprint("cannot open display\n");
 596         screen = DefaultScreen(dpy);
 597         root = RootWindow(dpy, screen);
 598         if(!(argp = malloc(sizeof *argp * (argc+2))))
 599                 eprint("cannot malloc %u bytes\n", sizeof *argp * (argc+2));
 600         memcpy(argp + 2, argv + 1, sizeof *argp * argc);
 601
 602         readstdin();
 603         running = grabkeyboard();
 604
 605         setup();
 606         drawmenu();
 607         XSync(dpy, False);
 608         run();
 609         cleanup();
 610         XCloseDisplay(dpy);
 611         return ret;
 612 }