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 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 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         KeySym ksym;
 234         int len;
 235         Status status;
 236
 237         len = XmbLookupString(xic, ev, buf, sizeof(buf), &ksym, &status);
 238         if(ev->state & ControlMask) {
 239                 KeySym lower, upper;
 240
 241                 XConvertCase(ksym, &lower, &upper);
 242                 switch(lower) {
 243                 case XK_a: ksym = XK_Home;      break;
 244                 case XK_b: ksym = XK_Left;      break;
 245                 case XK_c: ksym = XK_Escape;    break;
 246                 case XK_d: ksym = XK_Delete;    break;
 247                 case XK_e: ksym = XK_End;       break;
 248                 case XK_f: ksym = XK_Right;     break;
 249                 case XK_h: ksym = XK_BackSpace; break;
 250                 case XK_i: ksym = XK_Tab;       break;
 251                 case XK_j: ksym = XK_Return;    break;
 252                 case XK_m: ksym = XK_Return;    break;
 253                 case XK_n: ksym = XK_Up;        break;
 254                 case XK_p: ksym = XK_Down;      break;
 255
 256                 case XK_k: /* delete right */
 257                         text[cursor] = '\0';
 258                         match();
 259                         break;
 260                 case XK_u: /* delete left */
 261                         insert(NULL, 0 - cursor);
 262                         break;
 263                 case XK_w: /* delete word */
 264                         while(cursor > 0 && text[nextrune(-1)] == ' ')
 265                                 insert(NULL, nextrune(-1) - cursor);
 266                         while(cursor > 0 && text[nextrune(-1)] != ' ')
 267                                 insert(NULL, nextrune(-1) - cursor);
 268                         break;
 269                 case XK_y: /* paste selection */
 270                         XConvertSelection(dc->dpy, XA_PRIMARY, utf8, utf8, win, CurrentTime);
 271                         return;
 272                 default:
 273                         return;
 274                 }
 275         }
 276         switch(ksym) {
 277         default:
 278                 if(!iscntrl(*buf))
 279                         insert(buf, len);
 280                 break;
 281         case XK_Delete:
 282                 if(text[cursor] == '\0')
 283                         return;
 284                 cursor = nextrune(+1);
 285                 /* fallthrough */
 286         case XK_BackSpace:
 287                 if(cursor == 0)
 288                         return;
 289                 insert(NULL, nextrune(-1) - cursor);
 290                 break;
 291         case XK_End:
 292                 if(text[cursor] != '\0') {
 293                         cursor = strlen(text);
 294                         break;
 295                 }
 296                 if(next) {
 297                         curr = matchend;
 298                         calcoffsets();
 299                         curr = prev;
 300                         calcoffsets();
 301                         while(next && (curr = curr->right))
 302                                 calcoffsets();
 303                 }
 304                 sel = matchend;
 305                 break;
 306         case XK_Escape:
 307                 exit(EXIT_FAILURE);
 308         case XK_Home:
 309                 if(sel == matches) {
 310                         cursor = 0;
 311                         break;
 312                 }
 313                 sel = curr = matches;
 314                 calcoffsets();
 315                 break;
 316         case XK_Left:
 317                 if(cursor > 0 && (!sel || !sel->left || lines > 0)) {
 318                         cursor = nextrune(-1);
 319                         break;
 320                 }
 321                 /* fallthrough */
 322         case XK_Up:
 323                 if(sel && sel->left && (sel = sel->left)->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         case XK_KP_Enter:
 342                 puts((sel && !(ev->state & ShiftMask)) ? sel->text : text);
 343                 exit(EXIT_SUCCESS);
 344         case XK_Right:
 345                 if(text[cursor] != '\0') {
 346                         cursor = nextrune(+1);
 347                         break;
 348                 }
 349                 /* fallthrough */
 350         case XK_Down:
 351                 if(sel && sel->right && (sel = sel->right) == next) {
 352                         curr = next;
 353                         calcoffsets();
 354                 }
 355                 break;
 356         case XK_Tab:
 357                 if(!sel)
 358                         return;
 359                 strncpy(text, sel->text, sizeof text);
 360                 cursor = strlen(text);
 361                 match();
 362                 break;
 363         }
 364         drawmenu();
 365 }
 366
 367 void
 368 match(void) {
 369         static char **tokv = NULL;
 370         static int tokn = 0;
 371
 372         char buf[sizeof text], *s;
 373         int i, tokc = 0;
 374         size_t len;
 375         Item *item, *lprefix, *lsubstr, *prefixend, *substrend;
 376
 377         strcpy(buf, text);
 378         for(s = strtok(buf, " "); s; tokv[tokc-1] = s, s = strtok(NULL, " "))
 379                 if(++tokc > tokn && !(tokv = realloc(tokv, ++tokn * sizeof *tokv)))
 380                         eprintf("cannot realloc %u bytes\n", tokn * sizeof *tokv);
 381         len = tokc ? strlen(tokv[0]) : 0;
 382
 383         matches = lprefix = lsubstr = matchend = prefixend = substrend = NULL;
 384         for(item = items; item && item->text; item++) {
 385                 for(i = 0; i < tokc; i++)
 386                         if(!fstrstr(item->text, tokv[i]))
 387                                 break;
 388                 if(i != tokc)
 389                         continue;
 390                 if(!tokc || !fstrncmp(tokv[0], item->text, len+1))
 391                         appenditem(item, &matches, &matchend);
 392                 else if(!fstrncmp(tokv[0], item->text, len))
 393                         appenditem(item, &lprefix, &prefixend);
 394                 else
 395                         appenditem(item, &lsubstr, &substrend);
 396         }
 397         if(lprefix) {
 398                 if(matches) {
 399                         matchend->right = lprefix;
 400                         lprefix->left = matchend;
 401                 }
 402                 else
 403                         matches = lprefix;
 404                 matchend = prefixend;
 405         }
 406         if(lsubstr) {
 407                 if(matches) {
 408                         matchend->right = lsubstr;
 409                         lsubstr->left = matchend;
 410                 }
 411                 else
 412                         matches = lsubstr;
 413                 matchend = substrend;
 414         }
 415         curr = sel = matches;
 416         calcoffsets();
 417 }
 418
 419 size_t
 420 nextrune(int inc) {
 421         ssize_t n;
 422
 423         for(n = cursor + inc; n + inc >= 0 && (text[n] & 0xc0) == 0x80; n += inc);
 424         return n;
 425 }
 426
 427 void
 428 paste(void) {
 429         char *p, *q;
 430         int di;
 431         unsigned long dl;
 432         Atom da;
 433
 434         XGetWindowProperty(dc->dpy, win, utf8, 0, (sizeof text / 4) + 1, False,
 435                            utf8, &da, &di, &dl, &dl, (unsigned char **)&p);
 436         insert(p, (q = strchr(p, '\n')) ? q-p : (ssize_t)strlen(p));
 437         XFree(p);
 438         drawmenu();
 439 }
 440
 441 void
 442 readstdin(void) {
 443         char buf[sizeof text], *p, *maxstr = NULL;
 444         size_t i, max = 0, size = 0;
 445
 446         for(i = 0; fgets(buf, sizeof buf, stdin); i++) {
 447                 if(i+1 >= size / sizeof *items)
 448                         if(!(items = realloc(items, (size += BUFSIZ))))
 449                                 eprintf("cannot realloc %u bytes:", size);
 450                 if((p = strchr(buf, '\n')))
 451                         *p = '\0';
 452                 if(!(items[i].text = strdup(buf)))
 453                         eprintf("cannot strdup %u bytes:", strlen(buf)+1);
 454                 if(strlen(items[i].text) > max)
 455                         max = strlen(maxstr = items[i].text);
 456         }
 457         if(items)
 458                 items[i].text = NULL;
 459         inputw = maxstr ? textw(dc, maxstr) : 0;
 460         lines = MIN(lines, i);
 461 }
 462
 463 void
 464 run(void) {
 465         XEvent ev;
 466
 467         while(!XNextEvent(dc->dpy, &ev)) {
 468                 if(XFilterEvent(&ev, win))
 469                         continue;
 470                 switch(ev.type) {
 471                 case Expose:
 472                         if(ev.xexpose.count == 0)
 473                                 mapdc(dc, win, mw, mh);
 474                         break;
 475                 case KeyPress:
 476                         keypress(&ev.xkey);
 477                         break;
 478                 case SelectionNotify:
 479                         if(ev.xselection.property == utf8)
 480                                 paste();
 481                         break;
 482                 case VisibilityNotify:
 483                         if(ev.xvisibility.state != VisibilityUnobscured)
 484                                 XRaiseWindow(dc->dpy, win);
 485                         break;
 486                 }
 487         }
 488 }
 489
 490 void
 491 setup(void) {
 492         int x, y, screen = DefaultScreen(dc->dpy);
 493         Window root = RootWindow(dc->dpy, screen);
 494         XSetWindowAttributes swa;
 495         XIM xim;
 496 #ifdef XINERAMA
 497         int n;
 498         XineramaScreenInfo *info;
 499 #endif
 500
 501         normcol[ColBG] = getcolor(dc, normbgcolor);
 502         normcol[ColFG] = getcolor(dc, normfgcolor);
 503         selcol[ColBG]  = getcolor(dc, selbgcolor);
 504         selcol[ColFG]  = getcolor(dc, selfgcolor);
 505
 506         utf8 = XInternAtom(dc->dpy, "UTF8_STRING", False);
 507
 508         /* menu geometry */
 509         bh = dc->font.height + 2;
 510         lines = MAX(lines, 0);
 511         mh = (lines + 1) * bh;
 512 #ifdef XINERAMA
 513         if((info = XineramaQueryScreens(dc->dpy, &n))) {
 514                 int i, di;
 515                 unsigned int du;
 516                 Window w, dw;
 517                 XWindowAttributes wa;
 518
 519                 XGetInputFocus(dc->dpy, &w, &di);
 520                 if(w != root && w != PointerRoot && w != None && XGetWindowAttributes(dc->dpy, w, &wa))
 521                         XTranslateCoordinates(dc->dpy, w, root, wa.x, wa.y, &x, &y, &dw);
 522                 else
 523                         XQueryPointer(dc->dpy, root, &dw, &dw, &x, &y, &di, &di, &du);
 524                 for(i = 0; i < n-1; i++)
 525                         if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
 526                                 break;
 527                 x = info[i].x_org;
 528                 y = info[i].y_org + (topbar ? 0 : info[i].height - mh);
 529                 mw = info[i].width;
 530                 XFree(info);
 531         }
 532         else
 533 #endif
 534         {
 535                 x = 0;
 536                 y = topbar ? 0 : DisplayHeight(dc->dpy, screen) - mh;
 537                 mw = DisplayWidth(dc->dpy, screen);
 538         }
 539         promptw = prompt ? textw(dc, prompt) : 0;
 540         inputw = MIN(inputw, mw/3);
 541         match();
 542
 543         /* menu window */
 544         swa.override_redirect = True;
 545         swa.background_pixmap = ParentRelative;
 546         swa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
 547         win = XCreateWindow(dc->dpy, root, x, y, mw, mh, 0,
 548                             DefaultDepth(dc->dpy, screen), CopyFromParent,
 549                             DefaultVisual(dc->dpy, screen),
 550                             CWOverrideRedirect | CWBackPixmap | CWEventMask, &swa);
 551
 552         /* input methods */
 553         xim = XOpenIM(dc->dpy, NULL, NULL, NULL);
 554         xic = XCreateIC(xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
 555                                         XNClientWindow, win, XNFocusWindow, win, NULL);
 556
 557         XMapRaised(dc->dpy, win);
 558         resizedc(dc, mw, mh);
 559         drawmenu();
 560 }
 561
 562 void
 563 usage(void) {
 564         fputs("usage: dmenu [-b] [-f] [-i] [-l lines] [-p prompt] [-fn font]\n"
 565               "             [-nb color] [-nf color] [-sb color] [-sf color] [-v]\n", stderr);
 566         exit(EXIT_FAILURE);
 567 }