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