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