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 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                 grabkeyboard();
 108                 readstdin();
 109         }
 110         else {
 111                 readstdin();
 112                 grabkeyboard();
 113         }
 114         setup();
 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, DefaultRootWindow(dc->dpy), True,
 213                                  GrabModeAsync, GrabModeAsync, CurrentTime) == GrabSuccess)
 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                 if(next) {
 312                         curr = matchend;
 313                         calcoffsets();
 314                         curr = prev;
 315                         calcoffsets();
 316                         while(next && (curr = curr->right))
 317                                 calcoffsets();
 318                 }
 319                 sel = matchend;
 320                 break;
 321         case XK_Escape:
 322                 exit(EXIT_FAILURE);
 323         case XK_Home:
 324                 if(sel == matches) {
 325                         cursor = 0;
 326                         break;
 327                 }
 328                 sel = curr = matches;
 329                 calcoffsets();
 330                 break;
 331         case XK_Left:
 332                 if(cursor > 0 && (!sel || !sel->left || lines > 0)) {
 333                         cursor = nextrune(-1);
 334                         break;
 335                 }
 336                 else if(lines > 0)
 337                         return;
 338         case XK_Up:
 339                 if(sel && sel->left && (sel = sel->left)->right == curr) {
 340                         curr = prev;
 341                         calcoffsets();
 342                 }
 343                 break;
 344         case XK_Next:
 345                 if(!next)
 346                         return;
 347                 sel = curr = next;
 348                 calcoffsets();
 349                 break;
 350         case XK_Prior:
 351                 if(!prev)
 352                         return;
 353                 sel = curr = prev;
 354                 calcoffsets();
 355                 break;
 356         case XK_Return:
 357         case XK_KP_Enter:
 358                 fputs((sel && !(ev->state & ShiftMask)) ? sel->text : text, stdout);
 359                 exit(EXIT_SUCCESS);
 360         case XK_Right:
 361                 if(cursor < len) {
 362                         cursor = nextrune(+1);
 363                         break;
 364                 }
 365                 else if(lines > 0)
 366                         return;
 367         case XK_Down:
 368                 if(sel && sel->right && (sel = sel->right) == next) {
 369                         curr = next;
 370                         calcoffsets();
 371                 }
 372                 break;
 373         case XK_Tab:
 374                 if(!sel)
 375                         return;
 376                 strncpy(text, sel->text, sizeof text);
 377                 cursor = strlen(text);
 378                 match();
 379                 break;
 380         }
 381         drawmenu();
 382 }
 383
 384 void
 385 match(void) {
 386         size_t len = strlen(text);
 387         Item *item, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
 388
 389         matches = lexact = lprefix = lsubstr = matchend = exactend = prefixend = substrend = NULL;
 390         for(item = items; item && item->text; item++)
 391                 if(!fstrncmp(text, item->text, len + 1))
 392                         appenditem(item, &lexact, &exactend);
 393                 else if(!fstrncmp(text, item->text, len))
 394                         appenditem(item, &lprefix, &prefixend);
 395                 else if(fstrstr(item->text, text))
 396                         appenditem(item, &lsubstr, &substrend);
 397
 398         if(lexact) {
 399                 matches = lexact;
 400                 matchend = exactend;
 401         }
 402         if(lprefix) {
 403                 if(matchend) {
 404                         matchend->right = lprefix;
 405                         lprefix->left = matchend;
 406                 }
 407                 else
 408                         matches = lprefix;
 409                 matchend = prefixend;
 410         }
 411         if(lsubstr) {
 412                 if(matchend) {
 413                         matchend->right = lsubstr;
 414                         lsubstr->left = matchend;
 415                 }
 416                 else
 417                         matches = lsubstr;
 418                 matchend = substrend;
 419         }
 420         curr = sel = matches;
 421         calcoffsets();
 422 }
 423
 424 size_t
 425 nextrune(int incr) {
 426         size_t n, len = strlen(text);
 427
 428         for(n = cursor + incr; n >= 0 && n < len && (text[n] & 0xc0) == 0x80; n += incr);
 429         return n;
 430 }
 431
 432 void
 433 paste(void) {
 434         char *p, *q;
 435         int di;
 436         unsigned long dl;
 437         Atom da;
 438
 439         XGetWindowProperty(dc->dpy, win, utf8, 0, (sizeof text / 4) + 1, False,
 440                            utf8, &da, &di, &dl, &dl, (unsigned char **)&p);
 441         insert(p, (q = strchr(p, '\n')) ? q-p : strlen(p));
 442         XFree(p);
 443         drawmenu();
 444 }
 445
 446 void
 447 readstdin(void) {
 448         char buf[sizeof text], *p, *maxstr = NULL;
 449         size_t i, max = 0, size = 0;
 450
 451         for(i = 0; fgets(buf, sizeof buf, stdin); items[++i].text = NULL) {
 452                 if(i+1 >= size / sizeof *items)
 453                         if(!(items = realloc(items, (size += BUFSIZ))))
 454                                 eprintf("cannot realloc %u bytes:", size);
 455                 if((p = strchr(buf, '\n')))
 456                         *p = '\0';
 457                 if(!(items[i].text = strdup(buf)))
 458                         eprintf("cannot strdup %u bytes:", strlen(buf)+1);
 459                 if(strlen(items[i].text) > max)
 460                         max = strlen(maxstr = items[i].text);
 461         }
 462         inputw = maxstr ? textw(dc, maxstr) : 0;
 463 }
 464
 465 void
 466 run(void) {
 467         XEvent ev;
 468
 469         while(!XNextEvent(dc->dpy, &ev))
 470                 switch(ev.type) {
 471                 case Expose:
 472                         if(ev.xexpose.count == 0)
 473                                 drawmenu();
 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 void
 490 setup(void) {
 491         int x, y, screen = DefaultScreen(dc->dpy);
 492         Window root = RootWindow(dc->dpy, screen);
 493         XSetWindowAttributes wa;
 494 #ifdef XINERAMA
 495         int n;
 496         XineramaScreenInfo *info;
 497 #endif
 498
 499         normcol[ColBG] = getcolor(dc, normbgcolor);
 500         normcol[ColFG] = getcolor(dc, normfgcolor);
 501         selcol[ColBG] = getcolor(dc, selbgcolor);
 502         selcol[ColFG] = getcolor(dc, selfgcolor);
 503
 504         utf8 = XInternAtom(dc->dpy, "UTF8_STRING", False);
 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         resizedc(dc, mw, mh);
 543         inputw = MIN(inputw, mw/3);
 544         promptw = prompt ? textw(dc, prompt) : 0;
 545         XMapRaised(dc->dpy, win);
 546         drawmenu();
 547         match();
 548 }