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(void);
  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 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         for(i = 0; i < lines && prev && prev->left; i++)
 113                 prev = prev->left;
 114 }
 115
 116 char *
 117 cistrstr(const char *s, const char *sub) {
 118         int c, csub;
 119         unsigned int len;
 120
 121         if(!sub)
 122                 return (char *)s;
 123         if((c = tolower(*sub++)) != '\0') {
 124                 len = strlen(sub);
 125                 do {
 126                         do {
 127                                 if((csub = *s++) == '\0')
 128                                         return NULL;
 129                         }
 130                         while(tolower(csub) != c);
 131                 }
 132                 while(strncasecmp(s, sub, len) != 0);
 133                 s--;
 134         }
 135         return (char *)s;
 136 }
 137
 138 void
 139 cleanup(void) {
 140         Item *itm;
 141
 142         while(allitems) {
 143                 itm = allitems->next;
 144                 free(allitems->text);
 145                 free(allitems);
 146                 allitems = itm;
 147         }
 148         cleanupdraw(&dc);
 149         XDestroyWindow(dpy, win);
 150         XUngrabKeyboard(dpy, CurrentTime);
 151 }
 152
 153 void
 154 dinput(void) {
 155         cleanup();
 156         argp[0] = "dinput";
 157         argp[1] = text;
 158         execvp("dinput", argp);
 159         eprint("cannot exec dinput\n");
 160 }
 161
 162 void
 163 drawmenu(void) {
 164         dc.x = 0;
 165         dc.y = 0;
 166         dc.w = mw;
 167         dc.h = mh;
 168         drawtext(&dc, NULL, normcol, False);
 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(curr) {
 181                 if(lines > 0)
 182                         drawmenuv();
 183                 else
 184                         drawmenuh();
 185         }
 186         XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
 187         XFlush(dpy);
 188 }
 189
 190 void
 191 drawmenuh(void) {
 192         Item *i;
 193
 194         dc.x += cmdw;
 195         dc.w = spaceitem;
 196         drawtext(&dc, curr->left ? "<" : NULL, normcol, False);
 197         dc.x += dc.w;
 198         for(i = curr; i != next; i = i->right) {
 199                 dc.w = MIN(textw(&dc, i->text), mw / 3);
 200                 drawtext(&dc, i->text, (sel == i) ? selcol : normcol, False);
 201                 dc.x += dc.w;
 202         }
 203         dc.w = spaceitem;
 204         dc.x = mw - dc.w;
 205         drawtext(&dc, next ? ">" : NULL, normcol, False);
 206 }
 207
 208 void
 209 drawmenuv(void) {
 210         Item *i;
 211
 212         dc.w = mw - dc.x;
 213         dc.h = dc.font.height + 2;
 214         dc.y = dc.h;
 215         for(i = curr; i != next; i = i->right) {
 216                 drawtext(&dc, i->text, (sel == i) ? selcol : normcol, False);
 217                 dc.y += dc.h;
 218         }
 219         dc.h = mh - dc.y;
 220         drawtext(&dc, NULL, normcol, False);
 221 }
 222
 223 Bool
 224 grabkeyboard(void) {
 225         unsigned int len;
 226
 227         for(len = 1000; len; len--) {
 228                 if(XGrabKeyboard(dpy, parent, True, GrabModeAsync, GrabModeAsync, CurrentTime)
 229                 == GrabSuccess)
 230                         break;
 231                 usleep(1000);
 232         }
 233         return len > 0;
 234 }
 235
 236 void
 237 kpress(XKeyEvent *e) {
 238         char buf[sizeof text];
 239         int num;
 240         unsigned int i, len;
 241         KeySym ksym;
 242
 243         len = strlen(text);
 244         num = XLookupString(e, buf, sizeof buf, &ksym, NULL);
 245         if(ksym == XK_KP_Enter)
 246                 ksym = XK_Return;
 247         else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
 248                 ksym = (ksym - XK_KP_0) + XK_0;
 249         else if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
 250         || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
 251         || IsPrivateKeypadKey(ksym))
 252                 return;
 253         /* first check if a control mask is omitted */
 254         if(e->state & ControlMask) {
 255                 switch(tolower(ksym)) {
 256                 default:
 257                         return;
 258                 case XK_a:
 259                         ksym = XK_Home;
 260                         break;
 261                 case XK_b:
 262                         ksym = XK_Left;
 263                         break;
 264                 case XK_c:
 265                         ksym = XK_Escape;
 266                         break;
 267                 case XK_e:
 268                         ksym = XK_End;
 269                         break;
 270                 case XK_f:
 271                         ksym = XK_Right;
 272                         break;
 273                 case XK_h:
 274                         ksym = XK_BackSpace;
 275                         break;
 276                 case XK_i:
 277                         ksym = XK_Tab;
 278                         break;
 279                 case XK_j:
 280                 case XK_m:
 281                         ksym = XK_Return;
 282                         break;
 283                 case XK_n:
 284                         ksym = XK_Down;
 285                         break;
 286                 case XK_p:
 287                         ksym = XK_Up;
 288                         break;
 289                 case XK_u:
 290                         text[0] = '\0';
 291                         match(text);
 292                         break;
 293                 case XK_w:
 294                         if(len == 0)
 295                                 return;
 296                         i = len;
 297                         while(i-- > 0 && text[i] == ' ');
 298                         while(i-- > 0 && text[i] != ' ');
 299                         text[++i] = '\0';
 300                         match(text);
 301                         break;
 302                 case XK_x:
 303                         dinput();
 304                         break;
 305                 }
 306         }
 307         switch(ksym) {
 308         default:
 309                 num = MIN(num, sizeof text);
 310                 if(num && !iscntrl((int) buf[0])) {
 311                         memcpy(text + len, buf, num + 1);
 312                         len += num;
 313                         match(text);
 314                 }
 315                 break;
 316         case XK_BackSpace:
 317                 if(len == 0)
 318                         return;
 319                 for(i = 1; len - i > 0 && !IS_UTF8_1ST_CHAR(text[len - i]); i++);
 320                 len -= i;
 321                 text[len] = '\0';
 322                 match(text);
 323                 break;
 324         case XK_End:
 325                 while(next) {
 326                         sel = curr = next;
 327                         calcoffsets();
 328                 }
 329                 while(sel && sel->right)
 330                         sel = sel->right;
 331                 break;
 332         case XK_Escape:
 333                 ret = 1;
 334                 running = False;
 335                 return;
 336         case XK_Home:
 337                 sel = curr = item;
 338                 calcoffsets();
 339                 break;
 340         case XK_Left:
 341         case XK_Up:
 342                 if(!sel || !sel->left)
 343                         return;
 344                 sel = sel->left;
 345                 if(sel->right == curr) {
 346                         curr = prev;
 347                         calcoffsets();
 348                 }
 349                 break;
 350         case XK_Next:
 351                 if(!next)
 352                         return;
 353                 sel = curr = next;
 354                 calcoffsets();
 355                 break;
 356         case XK_Prior:
 357                 if(!prev)
 358                         return;
 359                 sel = curr = prev;
 360                 calcoffsets();
 361                 break;
 362         case XK_Return:
 363                 if((e->state & ShiftMask) || !sel)
 364                         fprintf(stdout, "%s", text);
 365                 else
 366                         fprintf(stdout, "%s", sel->text);
 367                 fflush(stdout);
 368                 running = False;
 369                 return;
 370         case XK_Right:
 371         case XK_Down:
 372                 if(!sel || !sel->right)
 373                         return;
 374                 sel = sel->right;
 375                 if(sel == next) {
 376                         curr = next;
 377                         calcoffsets();
 378                 }
 379                 break;
 380         case XK_Tab:
 381                 if(sel)
 382                         strncpy(text, sel->text, sizeof text);
 383                 dinput();
 384                 break;
 385         }
 386         drawmenu();
 387 }
 388
 389 void
 390 match(char *pattern) {
 391         unsigned int plen;
 392         Item *i, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
 393
 394         if(!pattern)
 395                 return;
 396         plen = strlen(pattern);
 397         item = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
 398         for(i = allitems; i; i = i->next)
 399                 if(!fstrncmp(pattern, i->text, plen + 1))
 400                         appenditem(i, &lexact, &exactend);
 401                 else if(!fstrncmp(pattern, i->text, plen))
 402                         appenditem(i, &lprefix, &prefixend);
 403                 else if(fstrstr(i->text, pattern))
 404                         appenditem(i, &lsubstr, &substrend);
 405         if(lexact) {
 406                 item = lexact;
 407                 itemend = exactend;
 408         }
 409         if(lprefix) {
 410                 if(itemend) {
 411                         itemend->right = lprefix;
 412                         lprefix->left = itemend;
 413                 }
 414                 else
 415                         item = lprefix;
 416                 itemend = prefixend;
 417         }
 418         if(lsubstr) {
 419                 if(itemend) {
 420                         itemend->right = lsubstr;
 421                         lsubstr->left = itemend;
 422                 }
 423                 else
 424                         item = lsubstr;
 425         }
 426         curr = prev = next = sel = item;
 427         calcoffsets();
 428 }
 429
 430 void
 431 readstdin(void) {
 432         char *p, buf[sizeof text];
 433         unsigned int len = 0, max = 0;
 434         Item *i, *new;
 435
 436         i = NULL;
 437         while(fgets(buf, sizeof buf, stdin)) {
 438                 len = strlen(buf);
 439                 if(buf[len-1] == '\n')
 440                         buf[--len] = '\0';
 441                 if(!(p = strdup(buf)))
 442                         eprint("cannot strdup %u bytes\n", len);
 443                 if((max = MAX(max, len)) == len)
 444                         maxname = p;
 445                 if(!(new = malloc(sizeof *new)))
 446                         eprint("cannot malloc %u bytes\n", sizeof *new);
 447                 new->next = new->left = new->right = NULL;
 448                 new->text = p;
 449                 if(!i)
 450                         allitems = new;
 451                 else
 452                         i->next = new;
 453                 i = new;
 454         }
 455 }
 456
 457 void
 458 run(void) {
 459         XEvent ev;
 460
 461         /* main event loop */
 462         while(running && !XNextEvent(dpy, &ev))
 463                 switch(ev.type) {
 464                 case KeyPress:
 465                         kpress(&ev.xkey);
 466                         break;
 467                 case Expose:
 468                         if(ev.xexpose.count == 0)
 469                                 drawmenu();
 470                         break;
 471                 case VisibilityNotify:
 472                         if (ev.xvisibility.state != VisibilityUnobscured)
 473                                 XRaiseWindow(dpy, win);
 474                         break;
 475                 }
 476 }
 477
 478 void
 479 setup(void) {
 480         int i, j, x, y;
 481 #if XINERAMA
 482         int n;
 483         XineramaScreenInfo *info = NULL;
 484 #endif
 485         XModifierKeymap *modmap;
 486         XSetWindowAttributes wa;
 487         XWindowAttributes pwa;
 488
 489         /* init modifier map */
 490         modmap = XGetModifierMapping(dpy);
 491         for(i = 0; i < 8; i++)
 492                 for(j = 0; j < modmap->max_keypermod; j++) {
 493                         if(modmap->modifiermap[i * modmap->max_keypermod + j]
 494                         == XKeysymToKeycode(dpy, XK_Num_Lock))
 495                                 numlockmask = (1 << i);
 496                 }
 497         XFreeModifiermap(modmap);
 498
 499         dc.dpy = dpy;
 500         normcol[ColBG] = getcolor(&dc, normbgcolor);
 501         normcol[ColFG] = getcolor(&dc, normfgcolor);
 502         selcol[ColBG] = getcolor(&dc, selbgcolor);
 503         selcol[ColFG] = getcolor(&dc, selfgcolor);
 504         initfont(&dc, font);
 505
 506         /* menu window */
 507         wa.override_redirect = True;
 508         wa.background_pixmap = ParentRelative;
 509         wa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
 510
 511         /* menu window geometry */
 512         mh = (dc.font.height + 2) * (lines + 1);
 513 #if XINERAMA
 514         if(parent == RootWindow(dpy, screen) && XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
 515                 i = 0;
 516                 if(n > 1) {
 517                         int di;
 518                         unsigned int dui;
 519                         Window dummy;
 520                         if(XQueryPointer(dpy, parent, &dummy, &dummy, &x, &y, &di, &di, &dui))
 521                                 for(i = 0; i < n; i++)
 522                                         if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
 523                                                 break;
 524                 }
 525                 x = info[i].x_org;
 526                 y = topbar ? info[i].y_org : info[i].y_org + info[i].height - mh;
 527                 mw = info[i].width;
 528                 XFree(info);
 529         }
 530         else
 531 #endif
 532         {
 533                 if(!XGetWindowAttributes(dpy, parent, &pwa))
 534                         eprint("cannot get window attributes");
 535                 x = 0;
 536                 y = topbar ? 0 : pwa.height - mh;
 537                 mw = pwa.width;
 538         }
 539
 540         win = XCreateWindow(dpy, parent, x, y, mw, mh, 0,
 541                         DefaultDepth(dpy, screen), CopyFromParent,
 542                         DefaultVisual(dpy, screen),
 543                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 544
 545         setupdraw(&dc, win);
 546         if(maxname)
 547                 cmdw = MIN(textw(&dc, maxname), mw / 3);
 548         if(prompt)
 549                 promptw = MIN(textw(&dc, prompt), mw / 5);
 550         text[0] = '\0';
 551         match(text);
 552         XMapRaised(dpy, win);
 553 }
 554
 555 int
 556 main(int argc, char *argv[]) {
 557         unsigned int i;
 558
 559         /* command line args */
 560         progname = argv[0];
 561         for(i = 1; i < argc; i++)
 562                 if(!strcmp(argv[i], "-i")) {
 563                         fstrncmp = strncasecmp;
 564                         fstrstr = cistrstr;
 565                 }
 566                 else if(!strcmp(argv[i], "-b"))
 567                         topbar = False;
 568                 else if(!strcmp(argv[i], "-e")) {
 569                         if(++i < argc) parent = atoi(argv[i]);
 570                 }
 571                 else if(!strcmp(argv[i], "-l")) {
 572                         if(++i < argc) lines = atoi(argv[i]);
 573                         if(lines > 0)
 574                                 calcoffsets = calcoffsetsv;
 575                 }
 576                 else if(!strcmp(argv[i], "-fn")) {
 577                         if(++i < argc) font = argv[i];
 578                 }
 579                 else if(!strcmp(argv[i], "-nb")) {
 580                         if(++i < argc) normbgcolor = argv[i];
 581                 }
 582                 else if(!strcmp(argv[i], "-nf")) {
 583                         if(++i < argc) normfgcolor = argv[i];
 584                 }
 585                 else if(!strcmp(argv[i], "-p")) {
 586                         if(++i < argc) prompt = argv[i];
 587                 }
 588                 else if(!strcmp(argv[i], "-sb")) {
 589                         if(++i < argc) selbgcolor = argv[i];
 590                 }
 591                 else if(!strcmp(argv[i], "-sf")) {
 592                         if(++i < argc) selfgcolor = argv[i];
 593                 }
 594                 else if(!strcmp(argv[i], "-v")) {
 595                         printf("dmenu-"VERSION", © 2006-2010 dmenu engineers, see LICENSE for details\n");
 596                         exit(EXIT_SUCCESS);
 597                 }
 598                 else {
 599                         fputs("usage: dmenu [-i] [-b] [-e <xid>] [-l <lines>] [-fn <font>] [-nb <color>]\n"
 600                                "             [-nf <color>] [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n", stderr);
 601                         exit(EXIT_FAILURE);
 602                 }
 603         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 604                 fprintf(stderr, "dmenu: warning: no locale support\n");
 605         if(!(dpy = XOpenDisplay(NULL)))
 606                 eprint("cannot open display\n");
 607         screen = DefaultScreen(dpy);
 608         if(!parent)
 609                 parent = RootWindow(dpy, screen);
 610         if(!(argp = malloc(sizeof *argp * (argc+2))))
 611                 eprint("cannot malloc %u bytes\n", sizeof *argp * (argc+2));
 612         memcpy(argp + 2, argv + 1, sizeof *argp * argc);
 613
 614         readstdin();
 615         running = grabkeyboard();
 616
 617         setup();
 618         drawmenu();
 619         XSync(dpy, False);
 620         run();
 621         cleanup();
 622         XCloseDisplay(dpy);
 623         return ret;
 624 }