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 static void usage(void);
  40
  41 static char text[BUFSIZ];
  42 static int bh, mw, mh;
  43 static int inputw = 0;
  44 static int lines = 0;
  45 static int monitor = -1;
  46 static int promptw;
  47 static size_t cursor = 0;
  48 static const char *font = NULL;
  49 static const char *prompt = NULL;
  50 static const char *normbgcolor = "#cccccc";
  51 static const char *normfgcolor = "#000000";
  52 static const char *selbgcolor  = "#0066ff";
  53 static const char *selfgcolor  = "#ffffff";
  54 static unsigned long normcol[ColLast];
  55 static unsigned long selcol[ColLast];
  56 static Atom utf8;
  57 static Bool topbar = True;
  58 static DC *dc;
  59 static Item *items = NULL;
  60 static Item *matches, *sel;
  61 static Item *prev, *curr, *next;
  62 static Window root, win;
  63
  64 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
  65
  66 int
  67 main(int argc, char *argv[]) {
  68         int i;
  69
  70         progname = "dmenu";
  71         for(i = 1; i < argc; i++)
  72                 /* single flags */
  73                 if(!strcmp(argv[i], "-v")) {
  74                         fputs("dmenu-"VERSION", © 2006-2010 dmenu engineers, see LICENSE for details\n", stdout);
  75                         exit(EXIT_SUCCESS);
  76                 }
  77                 else if(!strcmp(argv[i], "-b"))
  78                         topbar = False;
  79                 else if(!strcmp(argv[i], "-i"))
  80                         fstrncmp = strncasecmp;
  81                 else if(i == argc-1)
  82                         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                         usage();
 102
 103         dc = initdc();
 104         initfont(dc, font);
 105         readstdin();
 106         setup();
 107         run();
 108
 109         return EXIT_FAILURE;  /* should not reach */
 110 }
 111
 112 void
 113 appenditem(Item *item, Item **list, Item **last) {
 114         if(!*last)
 115                 *list = item;
 116         else
 117                 (*last)->right = item;
 118         item->left = *last;
 119         item->right = NULL;
 120         *last = item;
 121 }
 122
 123 void
 124 calcoffsets(void) {
 125         unsigned int i, n;
 126
 127         if(lines > 0)
 128                 n = lines * bh;
 129         else
 130                 n = mw - (promptw + inputw + textw(dc, "<") + textw(dc, ">"));
 131
 132         for(i = 0, next = curr; next; next = next->right)
 133                 if((i += (lines > 0) ? bh : MIN(textw(dc, next->text), n)) > n)
 134                         break;
 135         for(i = 0, prev = curr; prev && prev->left; prev = prev->left)
 136                 if((i += (lines > 0) ? bh : MIN(textw(dc, prev->left->text), n)) > n)
 137                         break;
 138 }
 139
 140 void
 141 drawmenu(void) {
 142         int curpos;
 143         Item *item;
 144
 145         dc->x = 0;
 146         dc->y = 0;
 147         dc->h = bh;
 148         drawrect(dc, 0, 0, mw, mh, True, BG(dc, normcol));
 149
 150         if(prompt) {
 151                 dc->w = promptw;
 152                 drawtext(dc, prompt, selcol);
 153                 dc->x = dc->w;
 154         }
 155         dc->w = (lines > 0 || !matches) ? mw - dc->x : inputw;
 156         drawtext(dc, text, normcol);
 157         if((curpos = textnw(dc, text, cursor) + dc->h/2 - 2) < dc->w)
 158                 drawrect(dc, curpos, 2, 1, dc->h - 4, True, FG(dc, normcol));
 159
 160         if(lines > 0) {
 161                 dc->w = mw - dc->x;
 162                 for(item = curr; item != next; item = item->right) {
 163                         dc->y += dc->h;
 164                         drawtext(dc, item->text, (item == sel) ? selcol : normcol);
 165                 }
 166         }
 167         else if(matches) {
 168                 dc->x += inputw;
 169                 dc->w = textw(dc, "<");
 170                 if(curr->left)
 171                         drawtext(dc, "<", normcol);
 172                 for(item = curr; item != next; item = item->right) {
 173                         dc->x += dc->w;
 174                         dc->w = MIN(textw(dc, item->text), mw - dc->x - textw(dc, ">"));
 175                         drawtext(dc, item->text, (item == sel) ? selcol : normcol);
 176                 }
 177                 dc->w = textw(dc, ">");
 178                 dc->x = mw - dc->w;
 179                 if(next)
 180                         drawtext(dc, ">", normcol);
 181         }
 182         mapdc(dc, win, mw, mh);
 183 }
 184
 185 char *
 186 fstrstr(const char *s, const char *sub) {
 187         size_t len;
 188
 189         for(len = strlen(sub); *s; s++)
 190                 if(!fstrncmp(s, sub, len))
 191                         return (char *)s;
 192         return NULL;
 193 }
 194
 195 void
 196 grabkeyboard(void) {
 197         int i;
 198
 199         for(i = 0; i < 1000; i++) {
 200                 if(!XGrabKeyboard(dc->dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime))
 201                         return;
 202                 usleep(1000);
 203         }
 204         eprintf("cannot grab keyboard\n");
 205 }
 206
 207 void
 208 insert(const char *s, ssize_t n) {
 209         if(strlen(text) + n > sizeof text - 1)
 210                 return;
 211         memmove(text + cursor + n, text + cursor, sizeof text - cursor - MAX(n, 0));
 212         if(n > 0)
 213                 memcpy(text + cursor, s, n);
 214         cursor += n;
 215         match();
 216 }
 217
 218 void
 219 keypress(XKeyEvent *ev) {
 220         char buf[32];
 221         size_t len;
 222         KeySym ksym;
 223
 224         len = strlen(text);
 225         XLookupString(ev, buf, sizeof buf, &ksym, NULL);
 226         if(ev->state & ControlMask) {
 227                 switch(tolower(ksym)) {
 228                 default:
 229                         return;
 230                 case XK_a:
 231                         ksym = XK_Home;
 232                         break;
 233                 case XK_b:
 234                         ksym = XK_Left;
 235                         break;
 236                 case XK_c:
 237                         ksym = XK_Escape;
 238                         break;
 239                 case XK_d:
 240                         ksym = XK_Delete;
 241                         break;
 242                 case XK_e:
 243                         ksym = XK_End;
 244                         break;
 245                 case XK_f:
 246                         ksym = XK_Right;
 247                         break;
 248                 case XK_h:
 249                         ksym = XK_BackSpace;
 250                         break;
 251                 case XK_i:
 252                         ksym = XK_Tab;
 253                         break;
 254                 case XK_j:
 255                         ksym = XK_Return;
 256                         break;
 257                 case XK_k:  /* delete right */
 258                         text[cursor] = '\0';
 259                         match();
 260                         break;
 261                 case XK_n:
 262                         ksym = XK_Down;
 263                         break;
 264                 case XK_p:
 265                         ksym = XK_Up;
 266                         break;
 267                 case XK_u:  /* delete left */
 268                         insert(NULL, 0 - cursor);
 269                         break;
 270                 case XK_w:  /* delete word */
 271                         while(cursor > 0 && text[nextrune(-1)] == ' ')
 272                                 insert(NULL, nextrune(-1) - cursor);
 273                         while(cursor > 0 && text[nextrune(-1)] != ' ')
 274                                 insert(NULL, nextrune(-1) - cursor);
 275                         break;
 276                 case XK_y:  /* paste selection */
 277                         XConvertSelection(dc->dpy, XA_PRIMARY, utf8, utf8, win, CurrentTime);
 278                         return;
 279                 }
 280         }
 281         switch(ksym) {
 282         default:
 283                 if(!iscntrl(*buf))
 284                         insert(buf, strlen(buf));
 285                 break;
 286         case XK_Delete:
 287                 if(cursor == len)
 288                         return;
 289                 cursor = nextrune(+1);
 290         case XK_BackSpace:
 291                 if(cursor > 0)
 292                         insert(NULL, nextrune(-1) - cursor);
 293                 break;
 294         case XK_End:
 295                 if(cursor < len) {
 296                         cursor = len;
 297                         break;
 298                 }
 299                 while(next) {
 300                         sel = curr = next;
 301                         calcoffsets();
 302                 }
 303                 while(sel && sel->right)
 304                         sel = sel->right;
 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                 else if(lines > 0)
 322                         return;
 323         case XK_Up:
 324                 if(sel && sel->left && (sel = sel->left)->right == curr) {
 325                         curr = prev;
 326                         calcoffsets();
 327                 }
 328                 break;
 329         case XK_Next:
 330                 if(!next)
 331                         return;
 332                 sel = curr = next;
 333                 calcoffsets();
 334                 break;
 335         case XK_Prior:
 336                 if(!prev)
 337                         return;
 338                 sel = curr = prev;
 339                 calcoffsets();
 340                 break;
 341         case XK_Return:
 342         case XK_KP_Enter:
 343                 fputs((sel && !(ev->state & ShiftMask)) ? sel->text : text, stdout);
 344                 fflush(stdout);
 345                 exit(EXIT_SUCCESS);
 346         case XK_Right:
 347                 if(cursor < len) {
 348                         cursor = nextrune(+1);
 349                         break;
 350                 }
 351                 else if(lines > 0)
 352                         return;
 353         case XK_Down:
 354                 if(sel && sel->right && (sel = sel->right) == next) {
 355                         curr = next;
 356                         calcoffsets();
 357                 }
 358                 break;
 359         case XK_Tab:
 360                 if(!sel)
 361                         return;
 362                 strncpy(text, sel->text, sizeof text);
 363                 cursor = strlen(text);
 364                 match();
 365                 break;
 366         }
 367         drawmenu();
 368 }
 369
 370 void
 371 match(void) {
 372         size_t len;
 373         Item *item, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
 374
 375         len = strlen(text);
 376         matches = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
 377         for(item = items; item; item = item->next)
 378                 if(!fstrncmp(text, item->text, len + 1))
 379                         appenditem(item, &lexact, &exactend);
 380                 else if(!fstrncmp(text, item->text, len))
 381                         appenditem(item, &lprefix, &prefixend);
 382                 else if(fstrstr(item->text, text))
 383                         appenditem(item, &lsubstr, &substrend);
 384
 385         if(lexact) {
 386                 matches = lexact;
 387                 itemend = exactend;
 388         }
 389         if(lprefix) {
 390                 if(itemend) {
 391                         itemend->right = lprefix;
 392                         lprefix->left = itemend;
 393                 }
 394                 else
 395                         matches = lprefix;
 396                 itemend = prefixend;
 397         }
 398         if(lsubstr) {
 399                 if(itemend) {
 400                         itemend->right = lsubstr;
 401                         lsubstr->left = itemend;
 402                 }
 403                 else
 404                         matches = lsubstr;
 405         }
 406         curr = prev = next = sel = matches;
 407         calcoffsets();
 408 }
 409
 410 size_t
 411 nextrune(int incr) {
 412         size_t n, len;
 413
 414         len = strlen(text);
 415         for(n = cursor + incr; n >= 0 && n < len && (text[n] & 0xc0) == 0x80; n += incr);
 416         return n;
 417 }
 418
 419 void
 420 paste(void) {
 421         char *p, *q;
 422         int di;
 423         unsigned long dl;
 424         Atom da;
 425
 426         XGetWindowProperty(dc->dpy, win, utf8, 0, (sizeof text / 4) + 1, False,
 427                            utf8, &da, &di, &dl, &dl, (unsigned char **)&p);
 428         insert(p, (q = strchr(p, '\n')) ? q-p : strlen(p));
 429         XFree(p);
 430         drawmenu();
 431 }
 432
 433 void
 434 readstdin(void) {
 435         char buf[sizeof text], *p;
 436         Item *item, **end;
 437
 438         for(end = &items; fgets(buf, sizeof buf, stdin); *end = item, end = &item->next) {
 439                 if((p = strchr(buf, '\n')))
 440                         *p = '\0';
 441                 if(!(item = malloc(sizeof *item)))
 442                         eprintf("cannot malloc %u bytes\n", sizeof *item);
 443                 if(!(item->text = strdup(buf)))
 444                         eprintf("cannot strdup %u bytes\n", strlen(buf)+1);
 445                 item->next = item->left = item->right = NULL;
 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         text[0] = '\0';
 534         match();
 535 }
 536
 537 void
 538 usage(void) {
 539         fputs("usage: dmenu [-b] [-i] [-l lines] [-m monitor] [-p prompt] [-fn font]\n"
 540               "             [-nb color] [-nf color] [-sb color] [-sf color] [-v]\n", stderr);
 541         exit(EXIT_FAILURE);
 542 }