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