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 <strings.h>
   7 #include <unistd.h>
   8 #include <X11/Xlib.h>
   9 #include <X11/Xatom.h>
  10 #include <X11/Xutil.h>
  11 #ifdef XINERAMA
  12 #include <X11/extensions/Xinerama.h>
  13 #endif
  14 #include "draw.h"
  15
  16 #define INRECT(x,y,rx,ry,rw,rh) ((x) >= (rx) && (x) < (rx)+(rw) && (y) >= (ry) && (y) < (ry)+(rh))
  17 #define MIN(a,b)                ((a) < (b) ? (a) : (b))
  18 #define MAX(a,b)                ((a) > (b) ? (a) : (b))
  19
  20 typedef struct Item Item;
  21 struct Item {
  22         char *text;
  23         Item *left, *right;
  24 };
  25
  26 static void appenditem(Item *item, Item **list, Item **last);
  27 static void calcoffsets(void);
  28 static void drawmenu(void);
  29 static char *fstrstr(const char *s, const char *sub);
  30 static void grabkeyboard(void);
  31 static void insert(const char *str, ssize_t n);
  32 static void keypress(XKeyEvent *ev);
  33 static void match(Bool sub);
  34 static size_t nextrune(int inc);
  35 static void paste(void);
  36 static void readstdin(void);
  37 static void run(void);
  38 static void setup(void);
  39 static void usage(void);
  40
  41 static char text[BUFSIZ] = "";
  42 static int bh, mw, mh;
  43 static int inputw, promptw;
  44 static int lines = 0;
  45 static size_t cursor = 0;
  46 static const char *font = NULL;
  47 static const char *prompt = NULL;
  48 static const char *normbgcolor = "#cccccc";
  49 static const char *normfgcolor = "#000000";
  50 static const char *selbgcolor  = "#0066ff";
  51 static const char *selfgcolor  = "#ffffff";
  52 static unsigned long normcol[ColLast];
  53 static unsigned long selcol[ColLast];
  54 static Atom utf8;
  55 static Bool topbar = True;
  56 static DC *dc;
  57 static Item *items = NULL;
  58 static Item *matches, *matchend;
  59 static Item *prev, *curr, *next, *sel;
  60 static Window win;
  61
  62 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
  63
  64 int
  65 main(int argc, char *argv[]) {
  66         Bool fast = False;
  67         int i;
  68
  69         for(i = 1; i < argc; i++)
  70                 /* single flags */
  71                 if(!strcmp(argv[i], "-v")) {
  72                         puts("dmenu-"VERSION", © 2006-2011 dmenu engineers, see LICENSE for details");
  73                         exit(EXIT_SUCCESS);
  74                 }
  75                 else if(!strcmp(argv[i], "-b"))
  76                         topbar = False;
  77                 else if(!strcmp(argv[i], "-f"))
  78                         fast = True;
  79                 else if(!strcmp(argv[i], "-i"))
  80                         fstrncmp = strncasecmp;
  81                 else if(i+1 == argc)
  82                         usage();
  83                 /* double flags */
  84                 else if(!strcmp(argv[i], "-l"))
  85                         lines = atoi(argv[++i]);
  86                 else if(!strcmp(argv[i], "-p"))
  87                         prompt = argv[++i];
  88                 else if(!strcmp(argv[i], "-fn"))
  89                         font = argv[++i];
  90                 else if(!strcmp(argv[i], "-nb"))
  91                         normbgcolor = argv[++i];
  92                 else if(!strcmp(argv[i], "-nf"))
  93                         normfgcolor = argv[++i];
  94                 else if(!strcmp(argv[i], "-sb"))
  95                         selbgcolor = argv[++i];
  96                 else if(!strcmp(argv[i], "-sf"))
  97                         selfgcolor = argv[++i];
  98                 else
  99                         usage();
 100
 101         dc = initdc();
 102         initfont(dc, font);
 103
 104         if(fast) {
 105                 grabkeyboard();
 106                 readstdin();
 107         }
 108         else {
 109                 readstdin();
 110                 grabkeyboard();
 111         }
 112         setup();
 113         run();
 114
 115         return EXIT_FAILURE;  /* should not reach */
 116 }
 117
 118 void
 119 appenditem(Item *item, Item **list, Item **last) {
 120         if(!*last)
 121                 *list = item;
 122         else
 123                 (*last)->right = item;
 124         item->left = *last;
 125         item->right = NULL;
 126         *last = item;
 127 }
 128
 129 void
 130 calcoffsets(void) {
 131         int i, n;
 132
 133         if(lines > 0)
 134                 n = lines * bh;
 135         else
 136                 n = mw - (promptw + inputw + textw(dc, "<") + textw(dc, ">"));
 137
 138         for(i = 0, next = curr; next; next = next->right)
 139                 if((i += (lines > 0) ? bh : MIN(textw(dc, next->text), n)) > n)
 140                         break;
 141         for(i = 0, prev = curr; prev && prev->left; prev = prev->left)
 142                 if((i += (lines > 0) ? bh : MIN(textw(dc, prev->left->text), n)) > n)
 143                         break;
 144 }
 145
 146 void
 147 drawmenu(void) {
 148         int curpos;
 149         Item *item;
 150
 151         dc->x = 0;
 152         dc->y = 0;
 153         dc->h = bh;
 154         drawrect(dc, 0, 0, mw, mh, True, BG(dc, normcol));
 155
 156         if(prompt) {
 157                 dc->w = promptw;
 158                 drawtext(dc, prompt, selcol);
 159                 dc->x = dc->w;
 160         }
 161         dc->w = (lines > 0 || !matches) ? mw - dc->x : inputw;
 162         drawtext(dc, text, normcol);
 163         if((curpos = textnw(dc, text, cursor) + dc->h/2 - 2) < dc->w)
 164                 drawrect(dc, curpos, 2, 1, dc->h - 4, True, FG(dc, normcol));
 165
 166         if(lines > 0) {
 167                 dc->w = mw - dc->x;
 168                 for(item = curr; item != next; item = item->right) {
 169                         dc->y += dc->h;
 170                         drawtext(dc, item->text, (item == sel) ? selcol : normcol);
 171                 }
 172         }
 173         else if(matches) {
 174                 dc->x += inputw;
 175                 dc->w = textw(dc, "<");
 176                 if(curr->left)
 177                         drawtext(dc, "<", normcol);
 178                 for(item = curr; item != next; item = item->right) {
 179                         dc->x += dc->w;
 180                         dc->w = MIN(textw(dc, item->text), mw - dc->x - textw(dc, ">"));
 181                         drawtext(dc, item->text, (item == sel) ? selcol : normcol);
 182                 }
 183                 dc->w = textw(dc, ">");
 184                 dc->x = mw - dc->w;
 185                 if(next)
 186                         drawtext(dc, ">", normcol);
 187         }
 188         mapdc(dc, win, mw, mh);
 189 }
 190
 191 char *
 192 fstrstr(const char *s, const char *sub) {
 193         size_t len;
 194
 195         for(len = strlen(sub); *s; s++)
 196                 if(!fstrncmp(s, sub, len))
 197                         return (char *)s;
 198         return NULL;
 199 }
 200
 201 void
 202 grabkeyboard(void) {
 203         int i;
 204
 205         for(i = 0; i < 1000; i++) {
 206                 if(XGrabKeyboard(dc->dpy, DefaultRootWindow(dc->dpy), True,
 207                                  GrabModeAsync, GrabModeAsync, CurrentTime) == GrabSuccess)
 208                         return;
 209                 usleep(1000);
 210         }
 211         eprintf("cannot grab keyboard\n");
 212 }
 213
 214 void
 215 insert(const char *str, ssize_t n) {
 216         if(strlen(text) + n > sizeof text - 1)
 217                 return;
 218         memmove(&text[cursor + n], &text[cursor], sizeof text - cursor - MAX(n, 0));
 219         if(n > 0)
 220                 memcpy(&text[cursor], str, n);
 221         cursor += n;
 222         match(n > 0 && text[cursor] == '\0');
 223 }
 224
 225 void
 226 keypress(XKeyEvent *ev) {
 227         char buf[32];
 228         KeySym ksym;
 229
 230         XLookupString(ev, buf, sizeof buf, &ksym, NULL);
 231         if(ev->state & ControlMask) {
 232                 KeySym lower, upper;
 233
 234                 XConvertCase(ksym, &lower, &upper);
 235                 switch(lower) {
 236                 default:
 237                         return;
 238                 case XK_a:
 239                         ksym = XK_Home;
 240                         break;
 241                 case XK_b:
 242                         ksym = XK_Left;
 243                         break;
 244                 case XK_c:
 245                         ksym = XK_Escape;
 246                         break;
 247                 case XK_d:
 248                         ksym = XK_Delete;
 249                         break;
 250                 case XK_e:
 251                         ksym = XK_End;
 252                         break;
 253                 case XK_f:
 254                         ksym = XK_Right;
 255                         break;
 256                 case XK_h:
 257                         ksym = XK_BackSpace;
 258                         break;
 259                 case XK_i:
 260                         ksym = XK_Tab;
 261                         break;
 262                 case XK_j:
 263                 case XK_m:
 264                         ksym = XK_Return;
 265                         break;
 266                 case XK_k:  /* delete right */
 267                         text[cursor] = '\0';
 268                         match(False);
 269                         break;
 270                 case XK_n:
 271                         ksym = XK_Next;
 272                         break;
 273                 case XK_p:
 274                         ksym = XK_Prior;
 275                         break;
 276                 case XK_u:  /* delete left */
 277                         insert(NULL, 0 - cursor);
 278                         break;
 279                 case XK_w:  /* delete word */
 280                         while(cursor > 0 && text[nextrune(-1)] == ' ')
 281                                 insert(NULL, nextrune(-1) - cursor);
 282                         while(cursor > 0 && text[nextrune(-1)] != ' ')
 283                                 insert(NULL, nextrune(-1) - cursor);
 284                         break;
 285                 case XK_y:  /* paste selection */
 286                         XConvertSelection(dc->dpy, XA_PRIMARY, utf8, utf8, win, CurrentTime);
 287                         return;
 288                 }
 289         }
 290         switch(ksym) {
 291         default:
 292                 if(!iscntrl(*buf))
 293                         insert(buf, strlen(buf));
 294                 break;
 295         case XK_Delete:
 296                 if(text[cursor] == '\0')
 297                         return;
 298                 cursor = nextrune(+1);
 299         case XK_BackSpace:
 300                 if(cursor > 0)
 301                         insert(NULL, nextrune(-1) - cursor);
 302                 break;
 303         case XK_End:
 304                 if(text[cursor] != '\0') {
 305                         cursor = strlen(text);
 306                         break;
 307                 }
 308                 if(next) {
 309                         curr = matchend;
 310                         calcoffsets();
 311                         curr = prev;
 312                         calcoffsets();
 313                         while(next && (curr = curr->right))
 314                                 calcoffsets();
 315                 }
 316                 sel = matchend;
 317                 break;
 318         case XK_Escape:
 319                 exit(EXIT_FAILURE);
 320         case XK_Home:
 321                 if(sel == matches) {
 322                         cursor = 0;
 323                         break;
 324                 }
 325                 sel = curr = matches;
 326                 calcoffsets();
 327                 break;
 328         case XK_Left:
 329                 if(cursor > 0 && (!sel || !sel->left || lines > 0)) {
 330                         cursor = nextrune(-1);
 331                         break;
 332                 }
 333                 /* fallthrough */
 334         case XK_Up:
 335                 if(sel && sel->left && (sel = sel->left)->right == curr) {
 336                         curr = prev;
 337                         calcoffsets();
 338                 }
 339                 break;
 340         case XK_Next:
 341                 if(!next)
 342                         return;
 343                 sel = curr = next;
 344                 calcoffsets();
 345                 break;
 346         case XK_Prior:
 347                 if(!prev)
 348                         return;
 349                 sel = curr = prev;
 350                 calcoffsets();
 351                 break;
 352         case XK_Return:
 353         case XK_KP_Enter:
 354                 fputs((sel && !(ev->state & ShiftMask)) ? sel->text : text, stdout);
 355                 exit(EXIT_SUCCESS);
 356         case XK_Right:
 357                 if(text[cursor] != '\0') {
 358                         cursor = nextrune(+1);
 359                         break;
 360                 }
 361                 /* fallthrough */
 362         case XK_Down:
 363                 if(sel && sel->right && (sel = sel->right) == next) {
 364                         curr = next;
 365                         calcoffsets();
 366                 }
 367                 break;
 368         case XK_Tab:
 369                 if(!sel)
 370                         return;
 371                 strncpy(text, sel->text, sizeof text);
 372                 cursor = strlen(text);
 373                 match(True);
 374                 break;
 375         }
 376         drawmenu();
 377 }
 378
 379 void
 380 match(Bool sub) {
 381         size_t len = strlen(text);
 382         Item *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
 383         Item *item, *lnext;
 384
 385         lexact = lprefix = lsubstr = exactend = prefixend = substrend = NULL;
 386         for(item = sub ? matches : items; item && item->text; item = lnext) {
 387                 lnext = sub ? item->right : item + 1;
 388                 if(!fstrncmp(text, item->text, len + 1))
 389                         appenditem(item, &lexact, &exactend);
 390                 else if(!fstrncmp(text, item->text, len))
 391                         appenditem(item, &lprefix, &prefixend);
 392                 else if(fstrstr(item->text, text))
 393                         appenditem(item, &lsubstr, &substrend);
 394         }
 395         matches = lexact;
 396         matchend = exactend;
 397
 398         if(lprefix) {
 399                 if(matchend) {
 400                         matchend->right = lprefix;
 401                         lprefix->left = matchend;
 402                 }
 403                 else
 404                         matches = lprefix;
 405                 matchend = prefixend;
 406         }
 407         if(lsubstr) {
 408                 if(matchend) {
 409                         matchend->right = lsubstr;
 410                         lsubstr->left = matchend;
 411                 }
 412                 else
 413                         matches = lsubstr;
 414                 matchend = substrend;
 415         }
 416         curr = sel = matches;
 417         calcoffsets();
 418 }
 419
 420 size_t
 421 nextrune(int inc) {
 422         ssize_t n;
 423
 424         for(n = cursor + inc; n + inc >= 0 && (text[n] & 0xc0) == 0x80; n += inc);
 425         return n;
 426 }
 427
 428 void
 429 paste(void) {
 430         char *p, *q;
 431         int di;
 432         unsigned long dl;
 433         Atom da;
 434
 435         XGetWindowProperty(dc->dpy, win, utf8, 0, (sizeof text / 4) + 1, False,
 436                            utf8, &da, &di, &dl, &dl, (unsigned char **)&p);
 437         insert(p, (q = strchr(p, '\n')) ? q-p : (ssize_t)strlen(p));
 438         XFree(p);
 439         drawmenu();
 440 }
 441
 442 void
 443 readstdin(void) {
 444         char buf[sizeof text], *p, *maxstr = NULL;
 445         size_t i, max = 0, size = 0;
 446
 447         for(i = 0; fgets(buf, sizeof buf, stdin); i++) {
 448                 if(i+1 >= size / sizeof *items)
 449                         if(!(items = realloc(items, (size += BUFSIZ))))
 450                                 eprintf("cannot realloc %u bytes:", size);
 451                 if((p = strchr(buf, '\n')))
 452                         *p = '\0';
 453                 if(!(items[i].text = strdup(buf)))
 454                         eprintf("cannot strdup %u bytes:", strlen(buf)+1);
 455                 if(strlen(items[i].text) > max)
 456                         max = strlen(maxstr = items[i].text);
 457         }
 458         if(items)
 459                 items[i].text = NULL;
 460         inputw = maxstr ? textw(dc, maxstr) : 0;
 461 }
 462
 463 void
 464 run(void) {
 465         XEvent ev;
 466
 467         while(!XNextEvent(dc->dpy, &ev))
 468                 switch(ev.type) {
 469                 case Expose:
 470                         if(ev.xexpose.count == 0)
 471                                 drawmenu();
 472                         break;
 473                 case KeyPress:
 474                         keypress(&ev.xkey);
 475                         break;
 476                 case SelectionNotify:
 477                         if(ev.xselection.property == utf8)
 478                                 paste();
 479                         break;
 480                 case VisibilityNotify:
 481                         if(ev.xvisibility.state != VisibilityUnobscured)
 482                                 XRaiseWindow(dc->dpy, win);
 483                         break;
 484                 }
 485 }
 486
 487 void
 488 setup(void) {
 489         int x, y, screen = DefaultScreen(dc->dpy);
 490         Window root = RootWindow(dc->dpy, screen);
 491         XSetWindowAttributes wa;
 492 #ifdef XINERAMA
 493         int n;
 494         XineramaScreenInfo *info;
 495 #endif
 496
 497         normcol[ColBG] = getcolor(dc, normbgcolor);
 498         normcol[ColFG] = getcolor(dc, normfgcolor);
 499         selcol[ColBG]  = getcolor(dc, selbgcolor);
 500         selcol[ColFG]  = getcolor(dc, selfgcolor);
 501
 502         utf8 = XInternAtom(dc->dpy, "UTF8_STRING", False);
 503
 504         /* menu geometry */
 505         bh = dc->font.height + 2;
 506         lines = MAX(lines, 0);
 507         mh = (lines + 1) * bh;
 508 #ifdef XINERAMA
 509         if((info = XineramaQueryScreens(dc->dpy, &n))) {
 510                 int i, di;
 511                 unsigned int du;
 512                 Window dw;
 513
 514                 XQueryPointer(dc->dpy, root, &dw, &dw, &x, &y, &di, &di, &du);
 515                 for(i = 0; i < n-1; i++)
 516                         if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
 517                                 break;
 518                 x = info[i].x_org;
 519                 y = info[i].y_org + (topbar ? 0 : info[i].height - mh);
 520                 mw = info[i].width;
 521                 XFree(info);
 522         }
 523         else
 524 #endif
 525         {
 526                 x = 0;
 527                 y = topbar ? 0 : DisplayHeight(dc->dpy, screen) - mh;
 528                 mw = DisplayWidth(dc->dpy, screen);
 529         }
 530         promptw = prompt ? textw(dc, prompt) : 0;
 531         inputw = MIN(inputw, mw/3);
 532         match(False);
 533
 534         /* menu window */
 535         wa.override_redirect = True;
 536         wa.background_pixmap = ParentRelative;
 537         wa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
 538         win = XCreateWindow(dc->dpy, root, x, y, mw, mh, 0,
 539                             DefaultDepth(dc->dpy, screen), CopyFromParent,
 540                             DefaultVisual(dc->dpy, screen),
 541                             CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 542
 543         XMapRaised(dc->dpy, win);
 544         resizedc(dc, mw, mh);
 545         drawmenu();
 546 }
 547
 548 void
 549 usage(void) {
 550         fputs("usage: dmenu [-b] [-f] [-i] [-l lines] [-p prompt] [-fn font]\n"
 551               "             [-nb color] [-nf color] [-sb color] [-sf color] [-v]\n", stderr);
 552         exit(EXIT_FAILURE);
 553 }