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
  17 /* macros */
  18 #define CLEANMASK(mask)         (mask & ~(numlockmask | LockMask))
  19 #define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
  20 #define MIN(a, b)               ((a) < (b) ? (a) : (b))
  21 #define MAX(a, b)               ((a) > (b) ? (a) : (b))
  22 #define IS_UTF8_1ST_CHAR(c)     ((((c) & 0xc0) == 0xc0) || !((c) & 0x80))
  23
  24 typedef struct Item Item;
  25 struct Item {
  26         char *text;
  27         Item *next;         /* traverses all items */
  28         Item *left, *right; /* traverses items matching current search pattern */
  29 };
  30
  31 /* forward declarations */
  32 static void appenditem(Item *i, Item **list, Item **last);
  33 static void calcoffsetsh(void);
  34 static void calcoffsetsv(void);
  35 static char *cistrstr(const char *s, const char *sub);
  36 static void cleanup(void);
  37 static void dinput(void);
  38 static void drawmenu(void);
  39 static void drawmenuh(void);
  40 static void drawmenuv(void);
  41 static Bool grabkeyboard(void);
  42 static void kpress(XKeyEvent *e);
  43 static void match(char *pattern);
  44 static void readstdin(void);
  45 static void run(void);
  46 static void setup(Bool topbar);
  47
  48 #include "config.h"
  49 #include "draw.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 DC dc;
  67 static Display *dpy;
  68 static Item *allitems = NULL;  /* first of all items */
  69 static Item *item = NULL;      /* first of pattern matching items */
  70 static Item *sel = NULL;
  71 static Item *next = NULL;
  72 static Item *prev = NULL;
  73 static Item *curr = NULL;
  74 static Window win, parent;
  75 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
  76 static char *(*fstrstr)(const char *, const char *) = strstr;
  77 static void (*calcoffsets)(void) = calcoffsetsh;
  78
  79 void
  80 appenditem(Item *i, Item **list, Item **last) {
  81         if(!(*last))
  82                 *list = i;
  83         else
  84                 (*last)->right = i;
  85         i->left = *last;
  86         i->right = NULL;
  87         *last = i;
  88 }
  89
  90 void
  91 calcoffsetsh(void) {
  92         unsigned int w;
  93
  94         w = promptw + cmdw + (2 * spaceitem);
  95         for(next = curr; next; next = next->right)
  96                 if((w += MIN(textw(&dc, next->text), mw / 3)) > mw)
  97                         break;
  98         w = promptw + cmdw + (2 * spaceitem);
  99         for(prev = curr; prev && prev->left; prev = prev->left)
 100                 if((w += MIN(textw(&dc, prev->left->text), mw / 3)) > mw)
 101                         break;
 102 }
 103
 104 void
 105 calcoffsetsv(void) {
 106         unsigned int i;
 107
 108         next = prev = curr;
 109         for(i = 0; i < lines && next; i++)
 110                 next = next->right;
 111         for(i = 0; i < lines && prev && prev->left; i++)
 112                 prev = prev->left;
 113 }
 114
 115 char *
 116 cistrstr(const char *s, const char *sub) {
 117         int c, csub;
 118         unsigned int len;
 119
 120         if(!sub)
 121                 return (char *)s;
 122         if((c = tolower(*sub++)) != '\0') {
 123                 len = strlen(sub);
 124                 do {
 125                         do {
 126                                 if((csub = *s++) == '\0')
 127                                         return NULL;
 128                         }
 129                         while(tolower(csub) != c);
 130                 }
 131                 while(strncasecmp(s, sub, len) != 0);
 132                 s--;
 133         }
 134         return (char *)s;
 135 }
 136
 137 void
 138 cleanup(void) {
 139         Item *itm;
 140
 141         while(allitems) {
 142                 itm = allitems->next;
 143                 free(allitems->text);
 144                 free(allitems);
 145                 allitems = itm;
 146         }
 147         cleanupdraw(&dc);
 148         XDestroyWindow(dpy, win);
 149         XUngrabKeyboard(dpy, CurrentTime);
 150 }
 151
 152 void
 153 dinput(void) {
 154         cleanup();
 155         argp[0] = "dinput";
 156         argp[1] = text;
 157         execvp("dinput", argp);
 158         eprint("cannot exec dinput\n");
 159 }
 160
 161 void
 162 drawmenu(void) {
 163         dc.x = 0;
 164         dc.y = 0;
 165         dc.w = mw;
 166         dc.h = mh;
 167         drawtext(&dc, NULL, normcol, False);
 168         /* print prompt? */
 169         if(prompt) {
 170                 dc.w = promptw;
 171                 drawtext(&dc, prompt, selcol, False);
 172                 dc.x += dc.w;
 173         }
 174         dc.w = mw - dc.x;
 175         /* print command */
 176         if(cmdw && item && lines == 0)
 177                 dc.w = cmdw;
 178         drawtext(&dc, *text ? text : NULL, normcol, False);
 179         if(curr) {
 180                 if(lines > 0)
 181                         drawmenuv();
 182                 else
 183                         drawmenuh();
 184         }
 185         XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
 186         XFlush(dpy);
 187 }
 188
 189 void
 190 drawmenuh(void) {
 191         Item *i;
 192
 193         dc.x += cmdw;
 194         dc.w = spaceitem;
 195         drawtext(&dc, curr->left ? "<" : NULL, normcol, False);
 196         dc.x += dc.w;
 197         for(i = curr; i != next; i = i->right) {
 198                 dc.w = MIN(textw(&dc, i->text), mw / 3);
 199                 drawtext(&dc, i->text, (sel == i) ? selcol : normcol, False);
 200                 dc.x += dc.w;
 201         }
 202         dc.w = spaceitem;
 203         dc.x = mw - dc.w;
 204         drawtext(&dc, next ? ">" : NULL, normcol, False);
 205 }
 206
 207 void
 208 drawmenuv(void) {
 209         Item *i;
 210
 211         dc.w = mw - dc.x;
 212         dc.h = dc.font.height + 2;
 213         dc.y = dc.h;
 214         for(i = curr; i != next; i = i->right) {
 215                 drawtext(&dc, i->text, (sel == i) ? selcol : normcol, False);
 216                 dc.y += dc.h;
 217         }
 218         dc.h = mh - dc.y;
 219         drawtext(&dc, NULL, normcol, False);
 220 }
 221
 222 Bool
 223 grabkeyboard(void) {
 224         unsigned int len;
 225
 226         for(len = 1000; len; len--) {
 227                 if(XGrabKeyboard(dpy, parent, 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                 case XK_x:
 302                         dinput();
 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) || !sel)
 363                         fprintf(stdout, "%s", text);
 364                 else
 365                         fprintf(stdout, "%s", sel->text);
 366                 fflush(stdout);
 367                 running = False;
 368                 return;
 369         case XK_Right:
 370         case XK_Down:
 371                 if(!sel || !sel->right)
 372                         return;
 373                 sel = sel->right;
 374                 if(sel == next) {
 375                         curr = next;
 376                         calcoffsets();
 377                 }
 378                 break;
 379         case XK_Tab:
 380                 if(sel)
 381                         strncpy(text, sel->text, sizeof text);
 382                 dinput();
 383                 break;
 384         }
 385         drawmenu();
 386 }
 387
 388 void
 389 match(char *pattern) {
 390         unsigned int plen;
 391         Item *i, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
 392
 393         if(!pattern)
 394                 return;
 395         plen = strlen(pattern);
 396         item = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
 397         for(i = allitems; i; i = i->next)
 398                 if(!fstrncmp(pattern, i->text, plen + 1))
 399                         appenditem(i, &lexact, &exactend);
 400                 else if(!fstrncmp(pattern, i->text, plen))
 401                         appenditem(i, &lprefix, &prefixend);
 402                 else if(fstrstr(i->text, pattern))
 403                         appenditem(i, &lsubstr, &substrend);
 404         if(lexact) {
 405                 item = lexact;
 406                 itemend = exactend;
 407         }
 408         if(lprefix) {
 409                 if(itemend) {
 410                         itemend->right = lprefix;
 411                         lprefix->left = itemend;
 412                 }
 413                 else
 414                         item = lprefix;
 415                 itemend = prefixend;
 416         }
 417         if(lsubstr) {
 418                 if(itemend) {
 419                         itemend->right = lsubstr;
 420                         lsubstr->left = itemend;
 421                 }
 422                 else
 423                         item = lsubstr;
 424         }
 425         curr = prev = next = sel = item;
 426         calcoffsets();
 427 }
 428
 429 void
 430 readstdin(void) {
 431         char *p, buf[sizeof text];
 432         unsigned int len = 0, max = 0;
 433         Item *i, *new;
 434
 435         i = NULL;
 436         while(fgets(buf, sizeof buf, stdin)) {
 437                 len = strlen(buf);
 438                 if(buf[len-1] == '\n')
 439                         buf[--len] = '\0';
 440                 if(!(p = strdup(buf)))
 441                         eprint("cannot strdup %u bytes\n", len);
 442                 if((max = MAX(max, len)) == len)
 443                         maxname = p;
 444                 if(!(new = malloc(sizeof *new)))
 445                         eprint("cannot malloc %u bytes\n", sizeof *new);
 446                 new->next = new->left = new->right = NULL;
 447                 new->text = p;
 448                 if(!i)
 449                         allitems = new;
 450                 else
 451                         i->next = new;
 452                 i = new;
 453         }
 454 }
 455
 456 void
 457 run(void) {
 458         XEvent ev;
 459
 460         /* main event loop */
 461         while(running && !XNextEvent(dpy, &ev))
 462                 switch(ev.type) {
 463                 case KeyPress:
 464                         kpress(&ev.xkey);
 465                         break;
 466                 case Expose:
 467                         if(ev.xexpose.count == 0)
 468                                 drawmenu();
 469                         break;
 470                 case VisibilityNotify:
 471                         if (ev.xvisibility.state != VisibilityUnobscured)
 472                                 XRaiseWindow(dpy, win);
 473                         break;
 474                 }
 475 }
 476
 477 void
 478 setup(Bool topbar) {
 479         int i, j, x, y;
 480 #if XINERAMA
 481         int n;
 482         XineramaScreenInfo *info = NULL;
 483 #endif
 484         XModifierKeymap *modmap;
 485         XSetWindowAttributes wa;
 486         XWindowAttributes pwa;
 487
 488         /* init modifier map */
 489         modmap = XGetModifierMapping(dpy);
 490         for(i = 0; i < 8; i++)
 491                 for(j = 0; j < modmap->max_keypermod; j++) {
 492                         if(modmap->modifiermap[i * modmap->max_keypermod + j]
 493                         == XKeysymToKeycode(dpy, XK_Num_Lock))
 494                                 numlockmask = (1 << i);
 495                 }
 496         XFreeModifiermap(modmap);
 497
 498         dc.dpy = dpy;
 499         normcol[ColBG] = getcolor(&dc, normbgcolor);
 500         normcol[ColFG] = getcolor(&dc, normfgcolor);
 501         selcol[ColBG] = getcolor(&dc, selbgcolor);
 502         selcol[ColFG] = getcolor(&dc, selfgcolor);
 503         initfont(&dc, font);
 504
 505         /* menu window */
 506         wa.override_redirect = True;
 507         wa.background_pixmap = ParentRelative;
 508         wa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
 509
 510         /* menu window geometry */
 511         mh = (dc.font.height + 2) * (lines + 1);
 512 #if XINERAMA
 513         if(parent == RootWindow(dpy, screen) && XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
 514                 i = 0;
 515                 if(n > 1) {
 516                         int di;
 517                         unsigned int dui;
 518                         Window dummy;
 519                         if(XQueryPointer(dpy, parent, &dummy, &dummy, &x, &y, &di, &di, &dui))
 520                                 for(i = 0; i < n; i++)
 521                                         if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
 522                                                 break;
 523                 }
 524                 x = info[i].x_org;
 525                 y = topbar ? info[i].y_org : info[i].y_org + info[i].height - mh;
 526                 mw = info[i].width;
 527                 XFree(info);
 528         }
 529         else
 530 #endif
 531         {
 532                 XGetWindowAttributes(dpy, parent, &pwa);
 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         Bool topbar = True;
 557
 558         /* command line args */
 559         progname = argv[0];
 560         for(i = 1; i < argc; i++)
 561                 if(!strcmp(argv[i], "-i")) {
 562                         fstrncmp = strncasecmp;
 563                         fstrstr = cistrstr;
 564                 }
 565                 else if(!strcmp(argv[i], "-b"))
 566                         topbar = False;
 567                 else if(!strcmp(argv[i], "-e")) {
 568                         if(++i < argc) parent = atoi(argv[i]);
 569                 }
 570                 else if(!strcmp(argv[i], "-l")) {
 571                         if(++i < argc) lines = atoi(argv[i]);
 572                         if(lines > 0)
 573                                 calcoffsets = calcoffsetsv;
 574                 }
 575                 else if(!strcmp(argv[i], "-fn")) {
 576                         if(++i < argc) font = argv[i];
 577                 }
 578                 else if(!strcmp(argv[i], "-nb")) {
 579                         if(++i < argc) normbgcolor = argv[i];
 580                 }
 581                 else if(!strcmp(argv[i], "-nf")) {
 582                         if(++i < argc) normfgcolor = argv[i];
 583                 }
 584                 else if(!strcmp(argv[i], "-p")) {
 585                         if(++i < argc) prompt = argv[i];
 586                 }
 587                 else if(!strcmp(argv[i], "-sb")) {
 588                         if(++i < argc) selbgcolor = argv[i];
 589                 }
 590                 else if(!strcmp(argv[i], "-sf")) {
 591                         if(++i < argc) selfgcolor = argv[i];
 592                 }
 593                 else if(!strcmp(argv[i], "-v")) {
 594                         printf("dmenu-"VERSION", © 2006-2010 dmenu engineers, see LICENSE for details\n");
 595                         exit(EXIT_SUCCESS);
 596                 }
 597                 else {
 598                         fputs("usage: dmenu [-i] [-b] [-e <xid>] [-l <lines>] [-fn <font>] [-nb <color>]\n"
 599                                "             [-nf <color>] [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n", stderr);
 600                         exit(EXIT_FAILURE);
 601                 }
 602         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 603                 fprintf(stderr, "dmenu: warning: no locale support\n");
 604         if(!(dpy = XOpenDisplay(NULL)))
 605                 eprint("cannot open display\n");
 606         screen = DefaultScreen(dpy);
 607         if(!parent)
 608                 parent = RootWindow(dpy, screen);
 609         if(!(argp = malloc(sizeof *argp * (argc+2))))
 610                 eprint("cannot malloc %u bytes\n", sizeof *argp * (argc+2));
 611         memcpy(argp + 2, argv + 1, sizeof *argp * argc);
 612
 613         readstdin();
 614         running = grabkeyboard();
 615
 616         setup(topbar);
 617         drawmenu();
 618         XSync(dpy, False);
 619         run();
 620         cleanup();
 621         XCloseDisplay(dpy);
 622         return ret;
 623 }