dmenu.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include <ctype.h>
   3 #include <locale.h>
   4 #include <stdarg.h>
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <strings.h>
   9 #include <unistd.h>
  10 #include <X11/keysym.h>
  11 #include <X11/Xlib.h>
  12 #include <X11/Xutil.h>
  13 #ifdef XINERAMA
  14 #include <X11/extensions/Xinerama.h>
  15 #endif
  16 #include <draw.h>
  17
  18 /* macros */
  19 #define CLEANMASK(mask)         (mask & ~(numlockmask | LockMask))
  20 #define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
  21 #define MIN(a, b)               ((a) < (b) ? (a) : (b))
  22 #define MAX(a, b)               ((a) > (b) ? (a) : (b))
  23 #define IS_UTF8_1ST_CHAR(c)     ((((c) & 0xc0) == 0xc0) || !((c) & 0x80))
  24
  25 typedef struct Item Item;
  26 struct Item {
  27         char *text;
  28         Item *next;         /* traverses all items */
  29         Item *left, *right; /* traverses items matching current search pattern */
  30 };
  31
  32 /* forward declarations */
  33 static void appenditem(Item *i, Item **list, Item **last);
  34 static void calcoffsetsh(void);
  35 static void calcoffsetsv(void);
  36 static char *cistrstr(const char *s, const char *sub);
  37 static void cleanup(void);
  38 static void dinput(void);
  39 static void drawmenu(void);
  40 static void drawmenuh(void);
  41 static void drawmenuv(void);
  42 static Bool grabkeyboard(void);
  43 static void kpress(XKeyEvent *e);
  44 static void match(char *pattern);
  45 static void readstdin(void);
  46 static void run(void);
  47 static void setup(void);
  48
  49 #include "config.h"
  50
  51 /* variables */
  52 static char **argp = NULL;
  53 static char *maxname = NULL;
  54 static char *prompt = NULL;
  55 static char text[4096];
  56 static int cmdw = 0;
  57 static int promptw = 0;
  58 static int ret = 0;
  59 static int screen;
  60 static unsigned int lines = 0;
  61 static unsigned int numlockmask = 0;
  62 static unsigned int mw, mh;
  63 static unsigned long normcol[ColLast];
  64 static unsigned long selcol[ColLast];
  65 static Bool running = True;
  66 static Bool topbar = True;
  67 static DC dc;
  68 static Display *dpy;
  69 static Item *allitems = NULL;  /* first of all items */
  70 static Item *item = NULL;      /* first of pattern matching items */
  71 static Item *sel = NULL;
  72 static Item *next = NULL;
  73 static Item *prev = NULL;
  74 static Item *curr = NULL;
  75 static Window win, parent;
  76 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
  77 static char *(*fstrstr)(const char *, const char *) = strstr;
  78 static void (*calcoffsets)(void) = calcoffsetsh;
  79
  80 void
  81 appenditem(Item *i, Item **list, Item **last) {
  82         if(!(*last))
  83                 *list = i;
  84         else
  85                 (*last)->right = i;
  86         i->left = *last;
  87         i->right = NULL;
  88         *last = i;
  89 }
  90
  91 void
  92 calcoffsetsh(void) {
  93         unsigned int w;
  94
  95         w = promptw + cmdw + (2 * spaceitem);
  96         for(next = curr; next; next = next->right)
  97                 if((w += MIN(textw(&dc, next->text), mw / 3)) > mw)
  98                         break;
  99         w = promptw + cmdw + (2 * spaceitem);
 100         for(prev = curr; prev && prev->left; prev = prev->left)
 101                 if((w += MIN(textw(&dc, prev->left->text), mw / 3)) > mw)
 102                         break;
 103 }
 104
 105 void
 106 calcoffsetsv(void) {
 107         unsigned int i;
 108
 109         next = prev = curr;
 110         for(i = 0; i < lines && next; i++)
 111                 next = next->right;
 112         mh = (dc.font.height + 2) * (i + 1);
 113         for(i = 0; i < lines && prev && prev->left; i++)
 114                 prev = prev->left;
 115 }
 116
 117 char *
 118 cistrstr(const char *s, const char *sub) {
 119         int c, csub;
 120         unsigned int len;
 121
 122         if(!sub)
 123                 return (char *)s;
 124         if((c = tolower(*sub++)) != '\0') {
 125                 len = strlen(sub);
 126                 do {
 127                         do {
 128                                 if((csub = *s++) == '\0')
 129                                         return NULL;
 130                         }
 131                         while(tolower(csub) != c);
 132                 }
 133                 while(strncasecmp(s, sub, len) != 0);
 134                 s--;
 135         }
 136         return (char *)s;
 137 }
 138
 139 void
 140 cleanup(void) {
 141         Item *itm;
 142
 143         while(allitems) {
 144                 itm = allitems->next;
 145                 free(allitems->text);
 146                 free(allitems);
 147                 allitems = itm;
 148         }
 149         cleanupdraw(&dc);
 150         XDestroyWindow(dpy, win);
 151         XUngrabKeyboard(dpy, CurrentTime);
 152 }
 153
 154 void
 155 dinput(void) {
 156         cleanup();
 157         argp[0] = "dinput";
 158         argp[1] = text;
 159         execvp("dinput", argp);
 160         eprint("cannot exec dinput\n");
 161 }
 162
 163 void
 164 drawmenu(void) {
 165         dc.x = 0;
 166         dc.y = 0;
 167         dc.w = mw;
 168         dc.h = mh;
 169         drawtext(&dc, NULL, normcol, False);
 170         dc.h = dc.font.height + 2;
 171         dc.y = topbar ? 0 : mh - dc.h;
 172         /* print prompt? */
 173         if(prompt) {
 174                 dc.w = promptw;
 175                 drawtext(&dc, prompt, selcol, False);
 176                 dc.x += dc.w;
 177         }
 178         dc.w = mw - dc.x;
 179         /* print command */
 180         if(cmdw && item && lines == 0)
 181                 dc.w = cmdw;
 182         drawtext(&dc, *text ? text : NULL, normcol, False);
 183         if(lines > 0)
 184                 drawmenuv();
 185         else
 186                 drawmenuh();
 187         XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
 188         XFlush(dpy);
 189 }
 190
 191 void
 192 drawmenuh(void) {
 193         Item *i;
 194
 195         dc.x += cmdw;
 196         dc.w = spaceitem;
 197         drawtext(&dc, curr && curr->left ? "<" : NULL, normcol, False);
 198         dc.x += dc.w;
 199         for(i = curr; i != next; i = i->right) {
 200                 dc.w = MIN(textw(&dc, i->text), mw / 3);
 201                 drawtext(&dc, i->text, (sel == i) ? selcol : normcol, False);
 202                 dc.x += dc.w;
 203         }
 204         dc.w = spaceitem;
 205         dc.x = mw - dc.w;
 206         drawtext(&dc, next ? ">" : NULL, normcol, False);
 207 }
 208
 209 void
 210 drawmenuv(void) {
 211         Item *i;
 212         XWindowAttributes wa;
 213
 214         dc.y = topbar ? dc.h : 0;
 215         dc.w = mw - dc.x;
 216         for(i = curr; i != next; i = i->right) {
 217                 drawtext(&dc, i->text, (sel == i) ? selcol : normcol, False);
 218                 dc.y += dc.h;
 219         }
 220         if(!XGetWindowAttributes(dpy, win, &wa))
 221                 eprint("cannot get window attributes");
 222         XMoveResizeWindow(dpy, win, wa.x, wa.y + (topbar ? 0 : wa.height - mh), mw, mh);
 223 }
 224
 225 Bool
 226 grabkeyboard(void) {
 227         unsigned int len;
 228
 229         for(len = 1000; len; len--) {
 230                 if(XGrabKeyboard(dpy, parent, True, GrabModeAsync, GrabModeAsync, CurrentTime)
 231                 == GrabSuccess)
 232                         break;
 233                 usleep(1000);
 234         }
 235         return len > 0;
 236 }
 237
 238 void
 239 kpress(XKeyEvent *e) {
 240         char buf[sizeof text];
 241         int num;
 242         unsigned int i, len;
 243         KeySym ksym;
 244
 245         len = strlen(text);
 246         num = XLookupString(e, buf, sizeof buf, &ksym, NULL);
 247         if(ksym == XK_KP_Enter)
 248                 ksym = XK_Return;
 249         else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
 250                 ksym = (ksym - XK_KP_0) + XK_0;
 251         else if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
 252         || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
 253         || IsPrivateKeypadKey(ksym))
 254                 return;
 255         /* first check if a control mask is omitted */
 256         if(e->state & ControlMask) {
 257                 switch(tolower(ksym)) {
 258                 default:
 259                         return;
 260                 case XK_a:
 261                         ksym = XK_Home;
 262                         break;
 263                 case XK_b:
 264                         ksym = XK_Left;
 265                         break;
 266                 case XK_c:
 267                         ksym = XK_Escape;
 268                         break;
 269                 case XK_e:
 270                         ksym = XK_End;
 271                         break;
 272                 case XK_f:
 273                         ksym = XK_Right;
 274                         break;
 275                 case XK_h:
 276                         ksym = XK_BackSpace;
 277                         break;
 278                 case XK_i:
 279                         ksym = XK_Tab;
 280                         break;
 281                 case XK_j:
 282                 case XK_m:
 283                         ksym = XK_Return;
 284                         break;
 285                 case XK_n:
 286                         ksym = XK_Down;
 287                         break;
 288                 case XK_p:
 289                         ksym = XK_Up;
 290                         break;
 291                 case XK_u:
 292                         text[0] = '\0';
 293                         match(text);
 294                         break;
 295                 case XK_w:
 296                         if(len == 0)
 297                                 return;
 298                         i = len;
 299                         while(i-- > 0 && text[i] == ' ');
 300                         while(i-- > 0 && text[i] != ' ');
 301                         text[++i] = '\0';
 302                         match(text);
 303                         break;
 304                 }
 305         }
 306         switch(ksym) {
 307         default:
 308                 num = MIN(num, sizeof text);
 309                 if(num && !iscntrl((int) buf[0])) {
 310                         memcpy(text + len, buf, num + 1);
 311                         len += num;
 312                         match(text);
 313                 }
 314                 break;
 315         case XK_BackSpace:
 316                 if(len == 0)
 317                         return;
 318                 for(i = 1; len - i > 0 && !IS_UTF8_1ST_CHAR(text[len - i]); i++);
 319                 len -= i;
 320                 text[len] = '\0';
 321                 match(text);
 322                 break;
 323         case XK_End:
 324                 while(next) {
 325                         sel = curr = next;
 326                         calcoffsets();
 327                 }
 328                 while(sel && sel->right)
 329                         sel = sel->right;
 330                 break;
 331         case XK_Escape:
 332                 ret = 1;
 333                 running = False;
 334                 return;
 335         case XK_Home:
 336                 sel = curr = item;
 337                 calcoffsets();
 338                 break;
 339         case XK_Left:
 340         case XK_Up:
 341                 if(!sel || !sel->left)
 342                         return;
 343                 sel = sel->left;
 344                 if(sel->right == curr) {
 345                         curr = prev;
 346                         calcoffsets();
 347                 }
 348                 break;
 349         case XK_Next:
 350                 if(!next)
 351                         return;
 352                 sel = curr = next;
 353                 calcoffsets();
 354                 break;
 355         case XK_Prior:
 356                 if(!prev)
 357                         return;
 358                 sel = curr = prev;
 359                 calcoffsets();
 360                 break;
 361         case XK_Return:
 362                 if(e->state & ShiftMask)
 363                         dinput();
 364                 fprintf(stdout, "%s", sel ? sel->text : text);
 365                 fflush(stdout);
 366                 running = False;
 367                 return;
 368         case XK_Right:
 369         case XK_Down:
 370                 if(!sel || !sel->right)
 371                         return;
 372                 sel = sel->right;
 373                 if(sel == next) {
 374                         curr = next;
 375                         calcoffsets();
 376                 }
 377                 break;
 378         case XK_Tab:
 379                 if(sel)
 380                         strncpy(text, sel->text, sizeof text);
 381                 dinput();
 382                 break;
 383         }
 384         drawmenu();
 385 }
 386
 387 void
 388 match(char *pattern) {
 389         unsigned int plen;
 390         Item *i, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
 391
 392         if(!pattern)
 393                 return;
 394         plen = strlen(pattern);
 395         item = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
 396         for(i = allitems; i; i = i->next)
 397                 if(!fstrncmp(pattern, i->text, plen + 1))
 398                         appenditem(i, &lexact, &exactend);
 399                 else if(!fstrncmp(pattern, i->text, plen))
 400                         appenditem(i, &lprefix, &prefixend);
 401                 else if(fstrstr(i->text, pattern))
 402                         appenditem(i, &lsubstr, &substrend);
 403         if(lexact) {
 404                 item = lexact;
 405                 itemend = exactend;
 406         }
 407         if(lprefix) {
 408                 if(itemend) {
 409                         itemend->right = lprefix;
 410                         lprefix->left = itemend;
 411                 }
 412                 else
 413                         item = lprefix;
 414                 itemend = prefixend;
 415         }
 416         if(lsubstr) {
 417                 if(itemend) {
 418                         itemend->right = lsubstr;
 419                         lsubstr->left = itemend;
 420                 }
 421                 else
 422                         item = lsubstr;
 423         }
 424         curr = prev = next = sel = item;
 425         calcoffsets();
 426 }
 427
 428 void
 429 readstdin(void) {
 430         char *p, buf[sizeof text];
 431         unsigned int len = 0, max = 0;
 432         Item *i, *new;
 433
 434         i = NULL;
 435         while(fgets(buf, sizeof buf, stdin)) {
 436                 len = strlen(buf);
 437                 if(buf[len-1] == '\n')
 438                         buf[--len] = '\0';
 439                 if(!(p = strdup(buf)))
 440                         eprint("cannot strdup %u bytes\n", len);
 441                 if((max = MAX(max, len)) == len)
 442                         maxname = p;
 443                 if(!(new = malloc(sizeof *new)))
 444                         eprint("cannot malloc %u bytes\n", sizeof *new);
 445                 new->next = new->left = new->right = NULL;
 446                 new->text = p;
 447                 if(!i)
 448                         allitems = new;
 449                 else
 450                         i->next = new;
 451                 i = new;
 452         }
 453 }
 454
 455 void
 456 run(void) {
 457         XEvent ev;
 458
 459         /* main event loop */
 460         while(running && !XNextEvent(dpy, &ev))
 461                 switch(ev.type) {
 462                 case KeyPress:
 463                         kpress(&ev.xkey);
 464                         break;
 465                 case Expose:
 466                         if(ev.xexpose.count == 0)
 467                                 drawmenu();
 468                         break;
 469                 case VisibilityNotify:
 470                         if (ev.xvisibility.state != VisibilityUnobscured)
 471                                 XRaiseWindow(dpy, win);
 472                         break;
 473                 }
 474 }
 475
 476 void
 477 setup(void) {
 478         int i, j, x, y;
 479 #if XINERAMA
 480         int n;
 481         XineramaScreenInfo *info = NULL;
 482 #endif
 483         XModifierKeymap *modmap;
 484         XSetWindowAttributes wa;
 485         XWindowAttributes pwa;
 486
 487         /* init modifier map */
 488         modmap = XGetModifierMapping(dpy);
 489         for(i = 0; i < 8; i++)
 490                 for(j = 0; j < modmap->max_keypermod; j++) {
 491                         if(modmap->modifiermap[i * modmap->max_keypermod + j]
 492                         == XKeysymToKeycode(dpy, XK_Num_Lock))
 493                                 numlockmask = (1 << i);
 494                 }
 495         XFreeModifiermap(modmap);
 496
 497         dc.dpy = dpy;
 498         normcol[ColBG] = getcolor(&dc, normbgcolor);
 499         normcol[ColFG] = getcolor(&dc, normfgcolor);
 500         selcol[ColBG] = getcolor(&dc, selbgcolor);
 501         selcol[ColFG] = getcolor(&dc, selfgcolor);
 502         initfont(&dc, font);
 503
 504         /* menu window */
 505         wa.override_redirect = True;
 506         wa.background_pixmap = ParentRelative;
 507         wa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
 508
 509         /* menu window geometry */
 510         mh = (dc.font.height + 2) * (lines + 1);
 511 #if XINERAMA
 512         if(parent == RootWindow(dpy, screen) && XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
 513                 i = 0;
 514                 if(n > 1) {
 515                         int di;
 516                         unsigned int dui;
 517                         Window dummy;
 518                         if(XQueryPointer(dpy, parent, &dummy, &dummy, &x, &y, &di, &di, &dui))
 519                                 for(i = 0; i < n; i++)
 520                                         if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
 521                                                 break;
 522                 }
 523                 x = info[i].x_org;
 524                 y = topbar ? info[i].y_org : info[i].y_org + info[i].height - mh;
 525                 mw = info[i].width;
 526                 XFree(info);
 527         }
 528         else
 529 #endif
 530         {
 531                 if(!XGetWindowAttributes(dpy, parent, &pwa))
 532                         eprint("cannot get window attributes");
 533                 x = 0;
 534                 y = topbar ? 0 : pwa.height - mh;
 535                 mw = pwa.width;
 536         }
 537
 538         win = XCreateWindow(dpy, parent, x, y, mw, mh, 0,
 539                         DefaultDepth(dpy, screen), CopyFromParent,
 540                         DefaultVisual(dpy, screen),
 541                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 542
 543         setupdraw(&dc, win);
 544         if(maxname)
 545                 cmdw = MIN(textw(&dc, maxname), mw / 3);
 546         if(prompt)
 547                 promptw = MIN(textw(&dc, prompt), mw / 5);
 548         text[0] = '\0';
 549         match(text);
 550         XMapRaised(dpy, win);
 551 }
 552
 553 int
 554 main(int argc, char *argv[]) {
 555         unsigned int i;
 556
 557         /* command line args */
 558         progname = argv[0];
 559         for(i = 1; i < argc; i++)
 560                 if(!strcmp(argv[i], "-i")) {
 561                         fstrncmp = strncasecmp;
 562                         fstrstr = cistrstr;
 563                 }
 564                 else if(!strcmp(argv[i], "-b"))
 565                         topbar = False;
 566                 else if(!strcmp(argv[i], "-e")) {
 567                         if(++i < argc) parent = atoi(argv[i]);
 568                 }
 569                 else if(!strcmp(argv[i], "-l")) {
 570                         if(++i < argc) lines = atoi(argv[i]);
 571                         if(lines > 0)
 572                                 calcoffsets = calcoffsetsv;
 573                 }
 574                 else if(!strcmp(argv[i], "-fn")) {
 575                         if(++i < argc) font = argv[i];
 576                 }
 577                 else if(!strcmp(argv[i], "-nb")) {
 578                         if(++i < argc) normbgcolor = argv[i];
 579                 }
 580                 else if(!strcmp(argv[i], "-nf")) {
 581                         if(++i < argc) normfgcolor = argv[i];
 582                 }
 583                 else if(!strcmp(argv[i], "-p")) {
 584                         if(++i < argc) prompt = argv[i];
 585                 }
 586                 else if(!strcmp(argv[i], "-sb")) {
 587                         if(++i < argc) selbgcolor = argv[i];
 588                 }
 589                 else if(!strcmp(argv[i], "-sf")) {
 590                         if(++i < argc) selfgcolor = argv[i];
 591                 }
 592                 else if(!strcmp(argv[i], "-v")) {
 593                         printf("dmenu-"VERSION", © 2006-2010 dmenu engineers, see LICENSE for details\n");
 594                         exit(EXIT_SUCCESS);
 595                 }
 596                 else {
 597                         fputs("usage: dmenu [-i] [-b] [-e <xid>] [-l <lines>] [-fn <font>] [-nb <color>]\n"
 598                                "             [-nf <color>] [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n", stderr);
 599                         exit(EXIT_FAILURE);
 600                 }
 601         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 602                 fprintf(stderr, "dmenu: warning: no locale support\n");
 603         if(!(dpy = XOpenDisplay(NULL)))
 604                 eprint("cannot open display\n");
 605         screen = DefaultScreen(dpy);
 606         if(!parent)
 607                 parent = RootWindow(dpy, screen);
 608         if(!(argp = malloc(sizeof *argp * (argc+2))))
 609                 eprint("cannot malloc %u bytes\n", sizeof *argp * (argc+2));
 610         memcpy(argp + 2, argv + 1, sizeof *argp * argc);
 611
 612         readstdin();
 613         running = grabkeyboard();
 614
 615         setup();
 616         drawmenu();
 617         XSync(dpy, False);
 618         run();
 619         cleanup();
 620         XCloseDisplay(dpy);
 621         return ret;
 622 }