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