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 char *cistrstr(const char *s, const char *sub);
  29 static void drawmenu(void);
  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(void);
  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 size_t cursor = 0;
  45 static const char *font = NULL;
  46 static const char *prompt = NULL;
  47 static const char *normbgcolor = "#cccccc";
  48 static const char *normfgcolor = "#000000";
  49 static const char *selbgcolor  = "#0066ff";
  50 static const char *selfgcolor  = "#ffffff";
  51 static unsigned int lines = 0;
  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 static XIC xic;
  62
  63 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
  64 static char *(*fstrstr)(const char *, const char *) = strstr;
  65
  66 int
  67 main(int argc, char *argv[]) {
  68         Bool fast = False;
  69         int i;
  70
  71         for(i = 1; i < argc; i++)
  72                 /* single flags */
  73                 if(!strcmp(argv[i], "-v")) {
  74                         puts("dmenu-"VERSION", © 2006-2011 dmenu engineers, see LICENSE for details");
  75                         exit(EXIT_SUCCESS);
  76                 }
  77                 else if(!strcmp(argv[i], "-b"))
  78                         topbar = False;
  79                 else if(!strcmp(argv[i], "-f"))
  80                         fast = True;
  81                 else if(!strcmp(argv[i], "-i")) {
  82                         fstrncmp = strncasecmp;
  83                         fstrstr = cistrstr;
  84                 }
  85                 else if(i+1 == argc)
  86                         usage();
  87                 /* double flags */
  88                 else if(!strcmp(argv[i], "-l"))
  89                         lines = atoi(argv[++i]);
  90                 else if(!strcmp(argv[i], "-p"))
  91                         prompt = argv[++i];
  92                 else if(!strcmp(argv[i], "-fn"))
  93                         font = argv[++i];
  94                 else if(!strcmp(argv[i], "-nb"))
  95                         normbgcolor = argv[++i];
  96                 else if(!strcmp(argv[i], "-nf"))
  97                         normfgcolor = argv[++i];
  98                 else if(!strcmp(argv[i], "-sb"))
  99                         selbgcolor = argv[++i];
 100                 else if(!strcmp(argv[i], "-sf"))
 101                         selfgcolor = argv[++i];
 102                 else
 103                         usage();
 104
 105         dc = initdc();
 106         initfont(dc, font);
 107
 108         if(fast) {
 109                 grabkeyboard();
 110                 readstdin();
 111         }
 112         else {
 113                 readstdin();
 114                 grabkeyboard();
 115         }
 116         setup();
 117         run();
 118
 119         return EXIT_FAILURE; /* unreachable */
 120 }
 121
 122 void
 123 appenditem(Item *item, Item **list, Item **last) {
 124         if(*last)
 125                 (*last)->right = item;
 126         else
 127                 *list = item;
 128
 129         item->left = *last;
 130         item->right = NULL;
 131         *last = item;
 132 }
 133
 134 void
 135 calcoffsets(void) {
 136         int i, n;
 137
 138         if(lines > 0)
 139                 n = lines * bh;
 140         else
 141                 n = mw - (promptw + inputw + textw(dc, "<") + textw(dc, ">"));
 142
 143         for(i = 0, next = curr; next; next = next->right)
 144                 if((i += (lines > 0) ? bh : MIN(textw(dc, next->text), n)) > n)
 145                         break;
 146         for(i = 0, prev = curr; prev && prev->left; prev = prev->left)
 147                 if((i += (lines > 0) ? bh : MIN(textw(dc, prev->left->text), n)) > n)
 148                         break;
 149 }
 150
 151 char *
 152 cistrstr(const char *s, const char *sub) {
 153         size_t len;
 154
 155         for(len = strlen(sub); *s; s++)
 156                 if(!strncasecmp(s, sub, len))
 157                         return (char *)s;
 158         return NULL;
 159 }
 160
 161 void
 162 drawmenu(void) {
 163         int curpos;
 164         Item *item;
 165
 166         dc->x = 0;
 167         dc->y = 0;
 168         dc->h = bh;
 169         drawrect(dc, 0, 0, mw, mh, True, BG(dc, normcol));
 170
 171         if(prompt) {
 172                 dc->w = promptw;
 173                 drawtext(dc, prompt, selcol);
 174                 dc->x = dc->w;
 175         }
 176         dc->w = (lines > 0 || !matches) ? mw - dc->x : inputw;
 177         drawtext(dc, text, normcol);
 178         if((curpos = textnw(dc, text, cursor) + dc->h/2 - 2) < dc->w)
 179                 drawrect(dc, curpos, 2, 1, dc->h - 4, True, FG(dc, normcol));
 180
 181         if(lines > 0) {
 182                 dc->w = mw - dc->x;
 183                 for(item = curr; item != next; item = item->right) {
 184                         dc->y += dc->h;
 185                         drawtext(dc, item->text, (item == sel) ? selcol : normcol);
 186                 }
 187         }
 188         else if(matches) {
 189                 dc->x += inputw;
 190                 dc->w = textw(dc, "<");
 191                 if(curr->left)
 192                         drawtext(dc, "<", normcol);
 193                 for(item = curr; item != next; item = item->right) {
 194                         dc->x += dc->w;
 195                         dc->w = MIN(textw(dc, item->text), mw - dc->x - textw(dc, ">"));
 196                         drawtext(dc, item->text, (item == sel) ? selcol : normcol);
 197                 }
 198                 dc->w = textw(dc, ">");
 199                 dc->x = mw - dc->w;
 200                 if(next)
 201                         drawtext(dc, ">", normcol);
 202         }
 203         mapdc(dc, win, mw, mh);
 204 }
 205
 206 void
 207 grabkeyboard(void) {
 208         int i;
 209
 210         for(i = 0; i < 1000; i++) {
 211                 if(XGrabKeyboard(dc->dpy, DefaultRootWindow(dc->dpy), True,
 212                                  GrabModeAsync, GrabModeAsync, CurrentTime) == GrabSuccess)
 213                         return;
 214                 usleep(1000);
 215         }
 216         eprintf("cannot grab keyboard\n");
 217 }
 218
 219 void
 220 insert(const char *str, ssize_t n) {
 221         if(strlen(text) + n > sizeof text - 1)
 222                 return;
 223         memmove(&text[cursor + n], &text[cursor], sizeof text - cursor - MAX(n, 0));
 224         if(n > 0)
 225                 memcpy(&text[cursor], str, n);
 226         cursor += n;
 227         match();
 228 }
 229
 230 void
 231 keypress(XKeyEvent *ev) {
 232         char buf[32];
 233         int len;
 234         KeySym ksym = NoSymbol;
 235         Status status;
 236
 237         len = XmbLookupString(xic, ev, buf, sizeof buf, &ksym, &status);
 238         if(status == XBufferOverflow)
 239                 return;
 240         if(ev->state & ControlMask) {
 241                 KeySym lower, upper;
 242
 243                 XConvertCase(ksym, &lower, &upper);
 244                 switch(lower) {
 245                 case XK_a: ksym = XK_Home;      break;
 246                 case XK_b: ksym = XK_Left;      break;
 247                 case XK_c: ksym = XK_Escape;    break;
 248                 case XK_d: ksym = XK_Delete;    break;
 249                 case XK_e: ksym = XK_End;       break;
 250                 case XK_f: ksym = XK_Right;     break;
 251                 case XK_h: ksym = XK_BackSpace; break;
 252                 case XK_i: ksym = XK_Tab;       break;
 253                 case XK_j: ksym = XK_Return;    break;
 254                 case XK_m: ksym = XK_Return;    break;
 255                 case XK_n: ksym = XK_Up;        break;
 256                 case XK_p: ksym = XK_Down;      break;
 257
 258                 case XK_k: /* delete right */
 259                         text[cursor] = '\0';
 260                         match();
 261                         break;
 262                 case XK_u: /* delete left */
 263                         insert(NULL, 0 - cursor);
 264                         break;
 265                 case XK_w: /* delete word */
 266                         while(cursor > 0 && text[nextrune(-1)] == ' ')
 267                                 insert(NULL, nextrune(-1) - cursor);
 268                         while(cursor > 0 && text[nextrune(-1)] != ' ')
 269                                 insert(NULL, nextrune(-1) - cursor);
 270                         break;
 271                 case XK_y: /* paste selection */
 272                         XConvertSelection(dc->dpy, XA_PRIMARY, utf8, utf8, win, CurrentTime);
 273                         return;
 274                 default:
 275                         return;
 276                 }
 277         }
 278         switch(ksym) {
 279         default:
 280                 if(!iscntrl(*buf))
 281                         insert(buf, len);
 282                 break;
 283         case XK_Delete:
 284                 if(text[cursor] == '\0')
 285                         return;
 286                 cursor = nextrune(+1);
 287                 /* fallthrough */
 288         case XK_BackSpace:
 289                 if(cursor == 0)
 290                         return;
 291                 insert(NULL, nextrune(-1) - cursor);
 292                 break;
 293         case XK_End:
 294                 if(text[cursor] != '\0') {
 295                         cursor = strlen(text);
 296                         break;
 297                 }
 298                 if(next) {
 299                         curr = matchend;
 300                         calcoffsets();
 301                         curr = prev;
 302                         calcoffsets();
 303                         while(next && (curr = curr->right))
 304                                 calcoffsets();
 305                 }
 306                 sel = matchend;
 307                 break;
 308         case XK_Escape:
 309                 exit(EXIT_FAILURE);
 310         case XK_Home:
 311                 if(sel == matches) {
 312                         cursor = 0;
 313                         break;
 314                 }
 315                 sel = curr = matches;
 316                 calcoffsets();
 317                 break;
 318         case XK_Left:
 319                 if(cursor > 0 && (!sel || !sel->left || lines > 0)) {
 320                         cursor = nextrune(-1);
 321                         break;
 322                 }
 323                 /* fallthrough */
 324         case XK_Up:
 325                 if(sel && sel->left && (sel = sel->left)->right == curr) {
 326                         curr = prev;
 327                         calcoffsets();
 328                 }
 329                 break;
 330         case XK_Next:
 331                 if(!next)
 332                         return;
 333                 sel = curr = next;
 334                 calcoffsets();
 335                 break;
 336         case XK_Prior:
 337                 if(!prev)
 338                         return;
 339                 sel = curr = prev;
 340                 calcoffsets();
 341                 break;
 342         case XK_Return:
 343         case XK_KP_Enter:
 344                 puts((sel && !(ev->state & ShiftMask)) ? sel->text : text);
 345                 exit(EXIT_SUCCESS);
 346         case XK_Right:
 347                 if(text[cursor] != '\0') {
 348                         cursor = nextrune(+1);
 349                         break;
 350                 }
 351                 /* fallthrough */
 352         case XK_Down:
 353                 if(sel && sel->right && (sel = sel->right) == 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                 cursor = strlen(text);
 363                 match();
 364                 break;
 365         }
 366         drawmenu();
 367 }
 368
 369 void
 370 match(void) {
 371         static char **tokv = NULL;
 372         static int tokn = 0;
 373
 374         char buf[sizeof text], *s;
 375         int i, tokc = 0;
 376         size_t len;
 377         Item *item, *lprefix, *lsubstr, *prefixend, *substrend;
 378
 379         strcpy(buf, text);
 380         for(s = strtok(buf, " "); s; tokv[tokc-1] = s, s = strtok(NULL, " "))
 381                 if(++tokc > tokn && !(tokv = realloc(tokv, ++tokn * sizeof *tokv)))
 382                         eprintf("cannot realloc %u bytes\n", tokn * sizeof *tokv);
 383         len = tokc ? strlen(tokv[0]) : 0;
 384
 385         matches = lprefix = lsubstr = matchend = prefixend = substrend = NULL;
 386         for(item = items; item && item->text; item++) {
 387                 for(i = 0; i < tokc; i++)
 388                         if(!fstrstr(item->text, tokv[i]))
 389                                 break;
 390                 if(i != tokc)
 391                         continue;
 392                 if(!tokc || !fstrncmp(tokv[0], item->text, len+1))
 393                         appenditem(item, &matches, &matchend);
 394                 else if(!fstrncmp(tokv[0], item->text, len))
 395                         appenditem(item, &lprefix, &prefixend);
 396                 else
 397                         appenditem(item, &lsubstr, &substrend);
 398         }
 399         if(lprefix) {
 400                 if(matches) {
 401                         matchend->right = lprefix;
 402                         lprefix->left = matchend;
 403                 }
 404                 else
 405                         matches = lprefix;
 406                 matchend = prefixend;
 407         }
 408         if(lsubstr) {
 409                 if(matches) {
 410                         matchend->right = lsubstr;
 411                         lsubstr->left = matchend;
 412                 }
 413                 else
 414                         matches = lsubstr;
 415                 matchend = substrend;
 416         }
 417         curr = sel = matches;
 418         calcoffsets();
 419 }
 420
 421 size_t
 422 nextrune(int inc) {
 423         ssize_t n;
 424
 425         for(n = cursor + inc; n + inc >= 0 && (text[n] & 0xc0) == 0x80; n += inc);
 426         return n;
 427 }
 428
 429 void
 430 paste(void) {
 431         char *p, *q;
 432         int di;
 433         unsigned long dl;
 434         Atom da;
 435
 436         XGetWindowProperty(dc->dpy, win, utf8, 0, (sizeof text / 4) + 1, False,
 437                            utf8, &da, &di, &dl, &dl, (unsigned char **)&p);
 438         insert(p, (q = strchr(p, '\n')) ? q-p : (ssize_t)strlen(p));
 439         XFree(p);
 440         drawmenu();
 441 }
 442
 443 void
 444 readstdin(void) {
 445         char buf[sizeof text], *p, *maxstr = NULL;
 446         size_t i, max = 0, size = 0;
 447
 448         for(i = 0; fgets(buf, sizeof buf, stdin); i++) {
 449                 if(i+1 >= size / sizeof *items)
 450                         if(!(items = realloc(items, (size += BUFSIZ))))
 451                                 eprintf("cannot realloc %u bytes:", size);
 452                 if((p = strchr(buf, '\n')))
 453                         *p = '\0';
 454                 if(!(items[i].text = strdup(buf)))
 455                         eprintf("cannot strdup %u bytes:", strlen(buf)+1);
 456                 if(strlen(items[i].text) > max)
 457                         max = strlen(maxstr = items[i].text);
 458         }
 459         if(items)
 460                 items[i].text = NULL;
 461         inputw = maxstr ? textw(dc, maxstr) : 0;
 462         lines = MIN(lines, i);
 463 }
 464
 465 void
 466 run(void) {
 467         XEvent ev;
 468
 469         while(!XNextEvent(dc->dpy, &ev)) {
 470                 if(XFilterEvent(&ev, win))
 471                         continue;
 472                 switch(ev.type) {
 473                 case Expose:
 474                         if(ev.xexpose.count == 0)
 475                                 mapdc(dc, win, mw, mh);
 476                         break;
 477                 case KeyPress:
 478                         keypress(&ev.xkey);
 479                         break;
 480                 case SelectionNotify:
 481                         if(ev.xselection.property == utf8)
 482                                 paste();
 483                         break;
 484                 case VisibilityNotify:
 485                         if(ev.xvisibility.state != VisibilityUnobscured)
 486                                 XRaiseWindow(dc->dpy, win);
 487                         break;
 488                 }
 489         }
 490 }
 491
 492 void
 493 setup(void) {
 494         int x, y, screen = DefaultScreen(dc->dpy);
 495         Window root = RootWindow(dc->dpy, screen);
 496         XSetWindowAttributes swa;
 497         XIM xim;
 498 #ifdef XINERAMA
 499         int n;
 500         XineramaScreenInfo *info;
 501 #endif
 502
 503         normcol[ColBG] = getcolor(dc, normbgcolor);
 504         normcol[ColFG] = getcolor(dc, normfgcolor);
 505         selcol[ColBG]  = getcolor(dc, selbgcolor);
 506         selcol[ColFG]  = getcolor(dc, selfgcolor);
 507
 508         utf8 = XInternAtom(dc->dpy, "UTF8_STRING", False);
 509
 510         /* menu geometry */
 511         bh = dc->font.height + 2;
 512         lines = MAX(lines, 0);
 513         mh = (lines + 1) * bh;
 514 #ifdef XINERAMA
 515         if((info = XineramaQueryScreens(dc->dpy, &n))) {
 516                 int i, di;
 517                 unsigned int du;
 518                 Window w, dw;
 519                 XWindowAttributes wa;
 520
 521                 XGetInputFocus(dc->dpy, &w, &di);
 522                 if(w != root && w != PointerRoot && w != None && XGetWindowAttributes(dc->dpy, w, &wa))
 523                         XTranslateCoordinates(dc->dpy, w, root, wa.x, wa.y, &x, &y, &dw);
 524                 else
 525                         XQueryPointer(dc->dpy, root, &dw, &dw, &x, &y, &di, &di, &du);
 526                 for(i = 0; i < n-1; i++)
 527                         if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
 528                                 break;
 529                 x = info[i].x_org;
 530                 y = info[i].y_org + (topbar ? 0 : info[i].height - mh);
 531                 mw = info[i].width;
 532                 XFree(info);
 533         }
 534         else
 535 #endif
 536         {
 537                 x = 0;
 538                 y = topbar ? 0 : DisplayHeight(dc->dpy, screen) - mh;
 539                 mw = DisplayWidth(dc->dpy, screen);
 540         }
 541         promptw = prompt ? textw(dc, prompt) : 0;
 542         inputw = MIN(inputw, mw/3);
 543         match();
 544
 545         /* menu window */
 546         swa.override_redirect = True;
 547         swa.background_pixmap = ParentRelative;
 548         swa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
 549         win = XCreateWindow(dc->dpy, root, x, y, mw, mh, 0,
 550                             DefaultDepth(dc->dpy, screen), CopyFromParent,
 551                             DefaultVisual(dc->dpy, screen),
 552                             CWOverrideRedirect | CWBackPixmap | CWEventMask, &swa);
 553
 554         /* input methods */
 555         xim = XOpenIM(dc->dpy, NULL, NULL, NULL);
 556         xic = XCreateIC(xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
 557                         XNClientWindow, win, XNFocusWindow, win, NULL);
 558
 559         XMapRaised(dc->dpy, win);
 560         resizedc(dc, mw, mh);
 561         drawmenu();
 562 }
 563
 564 void
 565 usage(void) {
 566         fputs("usage: dmenu [-b] [-f] [-i] [-l lines] [-p prompt] [-fn font]\n"
 567               "             [-nb color] [-nf color] [-sb color] [-sf color] [-v]\n", stderr);
 568         exit(EXIT_FAILURE);
 569 }