dmenu.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include <ctype.h>
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <unistd.h>
   7 #include <X11/Xlib.h>
   8 #include <X11/Xatom.h>
   9 #include <X11/Xutil.h>
  10 #ifdef XINERAMA
  11 #include <X11/extensions/Xinerama.h>
  12 #endif
  13 #include <draw.h>
  14
  15 #define INRECT(x,y,rx,ry,rw,rh) ((x) >= (rx) && (x) < (rx)+(rw) && (y) >= (ry) && (y) < (ry)+(rh))
  16 #define LINEH                   (dc->font.height + 2)
  17 #define MIN(a,b)                ((a) < (b) ? (a) : (b))
  18 #define MAX(a,b)                ((a) > (b) ? (a) : (b))
  19 #define UTF8_CODEPOINT(c)       (((c) & 0xc0) != 0x80)
  20
  21 typedef struct Item Item;
  22 struct Item {
  23         char *text;
  24         Item *next;          /* traverses all items */
  25         Item *left, *right;  /* traverses matching items */
  26 };
  27
  28 static void appenditem(Item *item, Item **list, Item **last);
  29 static void calcoffsets(void);
  30 static char *cistrstr(const char *s, const char *sub);
  31 static void drawmenu(void);
  32 static void grabkeyboard(void);
  33 static void insert(const char *s, ssize_t n);
  34 static void keypress(XKeyEvent *ev);
  35 static void match(void);
  36 static void paste(void);
  37 static void readstdin(void);
  38 static void run(void);
  39 static void setup(void);
  40 static void usage(void);
  41
  42 static char text[BUFSIZ];
  43 static size_t cursor = 0;
  44 static const char *font = NULL;
  45 static const char *prompt = NULL;
  46 static const char *normbgcolor = "#cccccc";
  47 static const char *normfgcolor = "#000000";
  48 static const char *selbgcolor  = "#0066ff";
  49 static const char *selfgcolor  = "#ffffff";
  50 static unsigned int inputw = 0;
  51 static unsigned int lines = 0;
  52 static unsigned int mw, mh;
  53 static unsigned int promptw;
  54 static unsigned long normcol[ColLast];
  55 static unsigned long selcol[ColLast];
  56 static Atom utf8;
  57 static Bool topbar = True;
  58 static DC *dc;
  59 static Item *allitems, *matches;
  60 static Item *curr, *prev, *next, *sel;
  61 static Window root, win;
  62
  63 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
  64 static char *(*fstrstr)(const char *, const char *) = strstr;
  65
  66 void
  67 appenditem(Item *item, Item **list, Item **last) {
  68         if(!*last)
  69                 *list = item;
  70         else
  71                 (*last)->right = item;
  72         item->left = *last;
  73         item->right = NULL;
  74         *last = item;
  75 }
  76
  77 void
  78 calcoffsets(void) {
  79         unsigned int i, n;
  80
  81         if(lines > 0)
  82                 n = lines * LINEH;
  83         else
  84                 n = mw - (promptw + inputw + textw(dc, "<") + textw(dc, ">"));
  85
  86         for(i = 0, next = curr; next; next = next->right)
  87                 if((i += (lines > 0) ? LINEH : MIN(textw(dc, next->text), mw/3)) > n)
  88                         break;
  89         for(i = 0, prev = curr; prev && prev->left; prev = prev->left)
  90                 if((i += (lines > 0) ? LINEH : MIN(textw(dc, prev->left->text), mw/3)) > n)
  91                         break;
  92 }
  93
  94 char *
  95 cistrstr(const char *s, const char *sub) {
  96         size_t len;
  97
  98         for(len = strlen(sub); *s; s++)
  99                 if(!strncasecmp(s, sub, len))
 100                         return (char *)s;
 101         return NULL;
 102 }
 103
 104 void
 105 drawmenu(void) {
 106         int curpos;
 107         Item *item;
 108
 109         dc->x = 0;
 110         dc->y = 0;
 111         dc->h = LINEH;
 112         drawrect(dc, 0, 0, mw, mh, BG(dc, normcol));
 113
 114         if(prompt) {
 115                 dc->w = promptw;
 116                 drawtext(dc, prompt, selcol);
 117                 dc->x = dc->w;
 118         }
 119         dc->w = (lines > 0 || !matches) ? mw - dc->x : inputw;
 120         drawtext(dc, text, normcol);
 121         if((curpos = textnw(dc, text, cursor) + dc->h/2 - 2) < dc->w)
 122                 drawrect(dc, curpos, 2, 1, dc->h - 4, FG(dc, normcol));
 123
 124         if(lines > 0) {
 125                 dc->w = mw - dc->x;
 126                 for(item = curr; item != next; item = item->right) {
 127                         dc->y += dc->h;
 128                         drawtext(dc, item->text, (item == sel) ? selcol : normcol);
 129                 }
 130         }
 131         else if(matches) {
 132                 dc->x += inputw;
 133                 dc->w = textw(dc, "<");
 134                 if(curr->left)
 135                         drawtext(dc, "<", normcol);
 136                 for(item = curr; item != next; item = item->right) {
 137                         dc->x += dc->w;
 138                         dc->w = MIN(textw(dc, item->text), mw/3);
 139                         drawtext(dc, item->text, (item == sel) ? selcol : normcol);
 140                 }
 141                 dc->w = textw(dc, ">");
 142                 dc->x = mw - dc->w;
 143                 if(next)
 144                         drawtext(dc, ">", normcol);
 145         }
 146         commitdraw(dc, win);
 147 }
 148
 149 void
 150 grabkeyboard(void) {
 151         int i;
 152
 153         for(i = 0; i < 1000; i++) {
 154                 if(!XGrabKeyboard(dc->dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime))
 155                         return;
 156                 usleep(1000);
 157         }
 158         eprintf("cannot grab keyboard\n");
 159 }
 160
 161 void
 162 insert(const char *s, ssize_t n) {
 163         memmove(text + cursor + n, text + cursor, sizeof text - cursor - n);
 164         if(n > 0)
 165                 memcpy(text + cursor, s, n);
 166         cursor += n;
 167         match();
 168 }
 169
 170 void
 171 keypress(XKeyEvent *ev) {
 172         char buf[32];
 173         int n;
 174         size_t len;
 175         KeySym ksym;
 176
 177         len = strlen(text);
 178         XLookupString(ev, buf, sizeof buf, &ksym, NULL);
 179         if(ev->state & ControlMask) {
 180                 switch(tolower(ksym)) {
 181                 default:
 182                         return;
 183                 case XK_a:
 184                         ksym = XK_Home;
 185                         break;
 186                 case XK_b:
 187                         ksym = XK_Left;
 188                         break;
 189                 case XK_c:
 190                         ksym = XK_Escape;
 191                         break;
 192                 case XK_d:
 193                         ksym = XK_Delete;
 194                         break;
 195                 case XK_e:
 196                         ksym = XK_End;
 197                         break;
 198                 case XK_f:
 199                         ksym = XK_Right;
 200                         break;
 201                 case XK_h:
 202                         ksym = XK_BackSpace;
 203                         break;
 204                 case XK_i:
 205                         ksym = XK_Tab;
 206                         break;
 207                 case XK_j:
 208                         ksym = XK_Return;
 209                         break;
 210                 case XK_k:  /* delete right */
 211                         text[cursor] = '\0';
 212                         match();
 213                         break;
 214                 case XK_n:
 215                         ksym = XK_Down;
 216                         break;
 217                 case XK_p:
 218                         ksym = XK_Up;
 219                         break;
 220                 case XK_u:  /* delete left */
 221                         insert(NULL, -cursor);
 222                         break;
 223                 case XK_w:  /* delete word */
 224                         if(cursor == 0)
 225                                 return;
 226                         n = 0;
 227                         while(cursor - n++ > 0 && text[cursor - n] == ' ');
 228                         while(cursor - n++ > 0 && text[cursor - n] != ' ');
 229                         insert(NULL, 1-n);
 230                         break;
 231                 case XK_y:  /* paste selection */
 232                         XConvertSelection(dc->dpy, XA_PRIMARY, utf8, None, win, CurrentTime);
 233                         return;
 234                 }
 235         }
 236         switch(ksym) {
 237         default:
 238                 if(isprint(*buf))
 239                         insert(buf, MIN(strlen(buf), sizeof text - cursor));
 240                 break;
 241         case XK_BackSpace:
 242                 if(cursor == 0)
 243                         return;
 244                 for(n = 1; cursor - n > 0 && !UTF8_CODEPOINT(text[cursor - n]); n++);
 245                 insert(NULL, -n);
 246                 break;
 247         case XK_Delete:
 248                 if(cursor == len)
 249                         return;
 250                 for(n = 1; cursor + n < len && !UTF8_CODEPOINT(text[cursor + n]); n++);
 251                 cursor += n;
 252                 insert(NULL, -n);
 253                 break;
 254         case XK_End:
 255                 if(cursor < len) {
 256                         cursor = len;
 257                         break;
 258                 }
 259                 while(next) {
 260                         sel = curr = next;
 261                         calcoffsets();
 262                 }
 263                 while(sel && sel->right)
 264                         sel = sel->right;
 265                 break;
 266         case XK_Escape:
 267                 exit(EXIT_FAILURE);
 268         case XK_Home:
 269                 if(sel == matches) {
 270                         cursor = 0;
 271                         break;
 272                 }
 273                 sel = curr = matches;
 274                 calcoffsets();
 275                 break;
 276         case XK_Left:
 277                 if(cursor > 0 && (!sel || !sel->left || lines > 0)) {
 278                         while(cursor-- > 0 && !UTF8_CODEPOINT(text[cursor]));
 279                         break;
 280                 }
 281                 else if(lines > 0)
 282                         return;
 283         case XK_Up:
 284                 if(!sel || !sel->left)
 285                         return;
 286                 if((sel = sel->left)->right == curr) {
 287                         curr = prev;
 288                         calcoffsets();
 289                 }
 290                 break;
 291         case XK_Next:
 292                 if(!next)
 293                         return;
 294                 sel = curr = next;
 295                 calcoffsets();
 296                 break;
 297         case XK_Prior:
 298                 if(!prev)
 299                         return;
 300                 sel = curr = prev;
 301                 calcoffsets();
 302                 break;
 303         case XK_Return:
 304         case XK_KP_Enter:
 305                 fputs((sel && !(ev->state & ShiftMask)) ? sel->text : text, stdout);
 306                 fflush(stdout);
 307                 exit(EXIT_SUCCESS);
 308         case XK_Right:
 309                 if(cursor < len) {
 310                         while(cursor++ < len && !UTF8_CODEPOINT(text[cursor]));
 311                         break;
 312                 }
 313                 else if(lines > 0)
 314                         return;
 315         case XK_Down:
 316                 if(!sel || !sel->right)
 317                         return;
 318                 if((sel = sel->right) == next) {
 319                         curr = next;
 320                         calcoffsets();
 321                 }
 322                 break;
 323         case XK_Tab:
 324                 if(!sel)
 325                         return;
 326                 strncpy(text, sel->text, sizeof text);
 327                 cursor = strlen(text);
 328                 match();
 329                 break;
 330         }
 331         drawmenu();
 332 }
 333
 334 void
 335 match(void) {
 336         size_t len;
 337         Item *item, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
 338
 339         len = strlen(text);
 340         matches = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
 341         for(item = allitems; item; item = item->next)
 342                 if(!fstrncmp(text, item->text, len + 1))
 343                         appenditem(item, &lexact, &exactend);
 344                 else if(!fstrncmp(text, item->text, len))
 345                         appenditem(item, &lprefix, &prefixend);
 346                 else if(fstrstr(item->text, text))
 347                         appenditem(item, &lsubstr, &substrend);
 348         if(lexact) {
 349                 matches = lexact;
 350                 itemend = exactend;
 351         }
 352         if(lprefix) {
 353                 if(itemend) {
 354                         itemend->right = lprefix;
 355                         lprefix->left = itemend;
 356                 }
 357                 else
 358                         matches = lprefix;
 359                 itemend = prefixend;
 360         }
 361         if(lsubstr) {
 362                 if(itemend) {
 363                         itemend->right = lsubstr;
 364                         lsubstr->left = itemend;
 365                 }
 366                 else
 367                         matches = lsubstr;
 368         }
 369         curr = prev = next = sel = matches;
 370         calcoffsets();
 371 }
 372
 373 void
 374 paste(void) {
 375         char *p, *q;
 376         int di;
 377         unsigned long dl;
 378         Atom da;
 379
 380         XGetWindowProperty(dc->dpy, win, utf8, 0, sizeof text - cursor, True,
 381                            utf8, &da, &di, &dl, &dl, (unsigned char **)&p);
 382         insert(p, (q = strchr(p, '\n')) ? q-p : strlen(p));
 383         XFree(p);
 384         drawmenu();
 385 }
 386
 387 void
 388 readstdin(void) {
 389         char buf[sizeof text], *p;
 390         Item *item, *new;
 391
 392         allitems = NULL;
 393         for(item = NULL; fgets(buf, sizeof buf, stdin); item = new) {
 394                 if((p = strchr(buf, '\n')))
 395                         *p = '\0';
 396                 if(!(new = malloc(sizeof *new)))
 397                         eprintf("cannot malloc %u bytes\n", sizeof *new);
 398                 if(!(new->text = strdup(buf)))
 399                         eprintf("cannot strdup %u bytes\n", strlen(buf)+1);
 400                 inputw = MAX(inputw, textw(dc, new->text));
 401                 new->next = new->left = new->right = NULL;
 402                 if(item)
 403                         item->next = new;
 404                 else
 405                         allitems = new;
 406         }
 407 }
 408
 409 void
 410 run(void) {
 411         XEvent ev;
 412
 413         while(!XNextEvent(dc->dpy, &ev))
 414                 switch(ev.type) {
 415                 case Expose:
 416                         if(ev.xexpose.count == 0)
 417                                 drawmenu();
 418                         break;
 419                 case KeyPress:
 420                         keypress(&ev.xkey);
 421                         break;
 422                 case SelectionNotify:
 423                         if(ev.xselection.property == utf8)
 424                                 paste();
 425                         break;
 426                 case VisibilityNotify:
 427                         if(ev.xvisibility.state != VisibilityUnobscured)
 428                                 XRaiseWindow(dc->dpy, win);
 429                         break;
 430                 }
 431 }
 432
 433 void
 434 setup(void) {
 435         int x, y, screen;
 436         XSetWindowAttributes wa;
 437 #ifdef XINERAMA
 438         int n;
 439         XineramaScreenInfo *info;
 440 #endif
 441
 442         screen = DefaultScreen(dc->dpy);
 443         root = RootWindow(dc->dpy, screen);
 444         utf8 = XInternAtom(dc->dpy, "UTF8_STRING", False);
 445
 446         normcol[ColBG] = getcolor(dc, normbgcolor);
 447         normcol[ColFG] = getcolor(dc, normfgcolor);
 448         selcol[ColBG] = getcolor(dc, selbgcolor);
 449         selcol[ColFG] = getcolor(dc, selfgcolor);
 450
 451         /* menu geometry */
 452         mh = (lines + 1) * LINEH;
 453 #ifdef XINERAMA
 454         if((info = XineramaQueryScreens(dc->dpy, &n))) {
 455                 int i, di;
 456                 unsigned int du;
 457                 Window dw;
 458
 459                 XQueryPointer(dc->dpy, root, &dw, &dw, &x, &y, &di, &di, &du);
 460                 for(i = 0; i < n; i++)
 461                         if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
 462                                 break;
 463                 x = info[i].x_org;
 464                 y = info[i].y_org + (topbar ? 0 : info[i].height - mh);
 465                 mw = info[i].width;
 466                 XFree(info);
 467         }
 468         else
 469 #endif
 470         {
 471                 x = 0;
 472                 y = topbar ? 0 : DisplayHeight(dc->dpy, screen) - mh;
 473                 mw = DisplayWidth(dc->dpy, screen);
 474         }
 475         /* menu window */
 476         wa.override_redirect = True;
 477         wa.background_pixmap = ParentRelative;
 478         wa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
 479         win = XCreateWindow(dc->dpy, root, x, y, mw, mh, 0,
 480                             DefaultDepth(dc->dpy, screen), CopyFromParent,
 481                             DefaultVisual(dc->dpy, screen),
 482                             CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 483
 484         grabkeyboard();
 485         setcanvas(dc, mw, mh);
 486         inputw = MIN(inputw, mw/3);
 487         promptw = prompt ? MIN(textw(dc, prompt), mw/5) : 0;
 488         XMapRaised(dc->dpy, win);
 489         text[0] = '\0';
 490         match();
 491 }
 492
 493 void
 494 usage(void) {
 495         fputs("usage: dmenu [-b] [-i] [-l lines] [-p prompt] [-fn font] [-nb color]\n"
 496               "             [-nf color] [-sb color] [-sf color] [-v]\n", stderr);
 497         exit(EXIT_FAILURE);
 498 }
 499
 500 int
 501 main(int argc, char *argv[]) {
 502         int i;
 503
 504         progname = "dmenu";
 505         for(i = 1; i < argc; i++)
 506                 /* single flags */
 507                 if(!strcmp(argv[i], "-v")) {
 508                         fputs("dmenu-"VERSION", © 2006-2010 dmenu engineers, see LICENSE for details\n", stdout);
 509                         exit(EXIT_SUCCESS);
 510                 }
 511                 else if(!strcmp(argv[i], "-b"))
 512                         topbar = False;
 513                 else if(!strcmp(argv[i], "-i")) {
 514                         fstrncmp = strncasecmp;
 515                         fstrstr = cistrstr;
 516                 }
 517                 else if(i == argc-1)
 518                         usage();
 519                 /* double flags */
 520                 else if(!strcmp(argv[i], "-l"))
 521                         lines = atoi(argv[++i]);
 522                 else if(!strcmp(argv[i], "-p"))
 523                         prompt = argv[++i];
 524                 else if(!strcmp(argv[i], "-fn"))
 525                         font = argv[++i];
 526                 else if(!strcmp(argv[i], "-nb"))
 527                         normbgcolor = argv[++i];
 528                 else if(!strcmp(argv[i], "-nf"))
 529                         normfgcolor = argv[++i];
 530                 else if(!strcmp(argv[i], "-sb"))
 531                         selbgcolor = argv[++i];
 532                 else if(!strcmp(argv[i], "-sf"))
 533                         selfgcolor = argv[++i];
 534                 else
 535                         usage();
 536
 537         dc = initdraw();
 538         initfont(dc, font);
 539         readstdin();
 540         setup();
 541         run();
 542
 543         return EXIT_FAILURE;  /* should not reach */
 544 }