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 <strings.h>
   7 #include <unistd.h>
   8 #include <X11/Xlib.h>
   9 #include <X11/Xatom.h>
  10 #include <X11/Xutil.h>
  11 #ifdef XINERAMA
  12 #include <X11/extensions/Xinerama.h>
  13 #endif
  14 #include "draw.h"
  15
  16 #define INRECT(x,y,rx,ry,rw,rh) ((x) >= (rx) && (x) < (rx)+(rw) && (y) >= (ry) && (y) < (ry)+(rh))
  17 #define MIN(a,b)                ((a) < (b) ? (a) : (b))
  18 #define MAX(a,b)                ((a) > (b) ? (a) : (b))
  19
  20 typedef struct Item Item;
  21 struct Item {
  22         char *text;
  23         Item *left, *right;
  24 };
  25
  26 static void appenditem(Item *item, Item **list, Item **last);
  27 static void calcoffsets(void);
  28 static char *cistrstr(const char *s, const char *sub);
  29 static void drawmenu(void);
  30 static void grabkeyboard(void);
  31 static void insert(const char *str, ssize_t n);
  32 static void keypress(XKeyEvent *ev);
  33 static void match(Bool sub);
  34 static size_t nextrune(int inc);
  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, promptw;
  44 static int lines = 0;
  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 static char *(*fstrstr)(const char *, const char *) = strstr;
  64
  65 int
  66 main(int argc, char *argv[]) {
  67         Bool fast = False;
  68         int i;
  69
  70         for(i = 1; i < argc; i++)
  71                 /* single flags */
  72                 if(!strcmp(argv[i], "-v")) {
  73                         puts("dmenu-"VERSION", © 2006-2011 dmenu engineers, see LICENSE for details");
  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                         fstrstr = cistrstr;
  83                 }
  84                 else if(i+1 == argc)
  85                         usage();
  86                 /* double flags */
  87                 else if(!strcmp(argv[i], "-l"))
  88                         lines = 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                         usage();
 103
 104         dc = initdc();
 105         initfont(dc, font);
 106
 107         if(fast) {
 108                 grabkeyboard();
 109                 readstdin();
 110         }
 111         else {
 112                 readstdin();
 113                 grabkeyboard();
 114         }
 115         setup();
 116         run();
 117
 118         return EXIT_FAILURE; /* unreachable */
 119 }
 120
 121 void
 122 appenditem(Item *item, Item **list, Item **last) {
 123         if(!*last)
 124                 *list = item;
 125         else
 126                 (*last)->right = item;
 127
 128         item->left = *last;
 129         item->right = NULL;
 130         *last = item;
 131 }
 132
 133 void
 134 calcoffsets(void) {
 135         int i, n;
 136
 137         if(lines > 0)
 138                 n = lines * bh;
 139         else
 140                 n = mw - (promptw + inputw + textw(dc, "<") + textw(dc, ">"));
 141
 142         for(i = 0, next = curr; next; next = next->right)
 143                 if((i += (lines > 0) ? bh : MIN(textw(dc, next->text), n)) > n)
 144                         break;
 145         for(i = 0, prev = curr; prev && prev->left; prev = prev->left)
 146                 if((i += (lines > 0) ? bh : MIN(textw(dc, prev->left->text), n)) > n)
 147                         break;
 148 }
 149
 150 char *
 151 cistrstr(const char *s, const char *sub) {
 152         size_t len;
 153
 154         for(len = strlen(sub); *s; s++)
 155                 if(!strncasecmp(s, sub, len))
 156                         return (char *)s;
 157         return NULL;
 158 }
 159
 160 void
 161 drawmenu(void) {
 162         int curpos;
 163         Item *item;
 164
 165         dc->x = 0;
 166         dc->y = 0;
 167         dc->h = bh;
 168         drawrect(dc, 0, 0, mw, mh, True, BG(dc, normcol));
 169
 170         if(prompt) {
 171                 dc->w = promptw;
 172                 drawtext(dc, prompt, selcol);
 173                 dc->x = dc->w;
 174         }
 175         dc->w = (lines > 0 || !matches) ? mw - dc->x : inputw;
 176         drawtext(dc, text, normcol);
 177         if((curpos = textnw(dc, text, cursor) + dc->h/2 - 2) < dc->w)
 178                 drawrect(dc, curpos, 2, 1, dc->h - 4, True, FG(dc, normcol));
 179
 180         if(lines > 0) {
 181                 dc->w = mw - dc->x;
 182                 for(item = curr; item != next; item = item->right) {
 183                         dc->y += dc->h;
 184                         drawtext(dc, item->text, (item == sel) ? selcol : normcol);
 185                 }
 186         }
 187         else if(matches) {
 188                 dc->x += inputw;
 189                 dc->w = textw(dc, "<");
 190                 if(curr->left)
 191                         drawtext(dc, "<", normcol);
 192                 for(item = curr; item != next; item = item->right) {
 193                         dc->x += dc->w;
 194                         dc->w = MIN(textw(dc, item->text), mw - dc->x - textw(dc, ">"));
 195                         drawtext(dc, item->text, (item == sel) ? selcol : normcol);
 196                 }
 197                 dc->w = textw(dc, ">");
 198                 dc->x = mw - dc->w;
 199                 if(next)
 200                         drawtext(dc, ">", normcol);
 201         }
 202         mapdc(dc, win, mw, mh);
 203 }
 204
 205 void
 206 grabkeyboard(void) {
 207         int i;
 208
 209         for(i = 0; i < 1000; i++) {
 210                 if(XGrabKeyboard(dc->dpy, DefaultRootWindow(dc->dpy), True,
 211                                  GrabModeAsync, GrabModeAsync, CurrentTime) == GrabSuccess)
 212                         return;
 213                 usleep(1000);
 214         }
 215         eprintf("cannot grab keyboard\n");
 216 }
 217
 218 void
 219 insert(const char *str, ssize_t n) {
 220         if(strlen(text) + n > sizeof text - 1)
 221                 return;
 222         memmove(&text[cursor + n], &text[cursor], sizeof text - cursor - MAX(n, 0));
 223         if(n > 0)
 224                 memcpy(&text[cursor], str, n);
 225         cursor += n;
 226         match(n > 0 && text[cursor] == '\0');
 227 }
 228
 229 void
 230 keypress(XKeyEvent *ev) {
 231         char buf[32];
 232         KeySym ksym;
 233
 234         XLookupString(ev, buf, sizeof buf, &ksym, NULL);
 235         if(ev->state & ControlMask) {
 236                 KeySym lower, upper;
 237
 238                 XConvertCase(ksym, &lower, &upper);
 239                 switch(lower) {
 240                 case XK_a: ksym = XK_Home;      break;
 241                 case XK_b: ksym = XK_Left;      break;
 242                 case XK_c: ksym = XK_Escape;    break;
 243                 case XK_d: ksym = XK_Delete;    break;
 244                 case XK_e: ksym = XK_End;       break;
 245                 case XK_f: ksym = XK_Right;     break;
 246                 case XK_h: ksym = XK_BackSpace; break;
 247                 case XK_i: ksym = XK_Tab;       break;
 248                 case XK_j: ksym = XK_Return;    break;
 249                 case XK_m: ksym = XK_Return;    break;
 250                 case XK_n: ksym = XK_Up;        break;
 251                 case XK_p: ksym = XK_Down;      break;
 252
 253                 case XK_k: /* delete right */
 254                         text[cursor] = '\0';
 255                         match(False);
 256                         break;
 257                 case XK_u: /* delete left */
 258                         insert(NULL, 0 - cursor);
 259                         break;
 260                 case XK_w: /* delete word */
 261                         while(cursor > 0 && text[nextrune(-1)] == ' ')
 262                                 insert(NULL, nextrune(-1) - cursor);
 263                         while(cursor > 0 && text[nextrune(-1)] != ' ')
 264                                 insert(NULL, nextrune(-1) - cursor);
 265                         break;
 266                 case XK_y: /* paste selection */
 267                         XConvertSelection(dc->dpy, XA_PRIMARY, utf8, utf8, win, CurrentTime);
 268                         return;
 269                 default:
 270                         return;
 271                 }
 272         }
 273         switch(ksym) {
 274         default:
 275                 if(!iscntrl(*buf))
 276                         insert(buf, strlen(buf));
 277                 break;
 278         case XK_Delete:
 279                 if(text[cursor] == '\0')
 280                         return;
 281                 cursor = nextrune(+1);
 282         case XK_BackSpace:
 283                 if(cursor == 0)
 284                         return;
 285                 insert(NULL, nextrune(-1) - cursor);
 286                 break;
 287         case XK_End:
 288                 if(text[cursor] != '\0') {
 289                         cursor = strlen(text);
 290                         break;
 291                 }
 292                 if(next) {
 293                         curr = matchend;
 294                         calcoffsets();
 295                         curr = prev;
 296                         calcoffsets();
 297                         while(next && (curr = curr->right))
 298                                 calcoffsets();
 299                 }
 300                 sel = matchend;
 301                 break;
 302         case XK_Escape:
 303                 exit(EXIT_FAILURE);
 304         case XK_Home:
 305                 if(sel == matches) {
 306                         cursor = 0;
 307                         break;
 308                 }
 309                 sel = curr = matches;
 310                 calcoffsets();
 311                 break;
 312         case XK_Left:
 313                 if(cursor > 0 && (!sel || !sel->left || lines > 0)) {
 314                         cursor = nextrune(-1);
 315                         break;
 316                 }
 317                 /* fallthrough */
 318         case XK_Up:
 319                 if(sel && sel->left && (sel = sel->left)->right == curr) {
 320                         curr = prev;
 321                         calcoffsets();
 322                 }
 323                 break;
 324         case XK_Next:
 325                 if(!next)
 326                         return;
 327                 sel = curr = next;
 328                 calcoffsets();
 329                 break;
 330         case XK_Prior:
 331                 if(!prev)
 332                         return;
 333                 sel = curr = prev;
 334                 calcoffsets();
 335                 break;
 336         case XK_Return:
 337         case XK_KP_Enter:
 338                 puts((sel && !(ev->state & ShiftMask)) ? sel->text : text);
 339                 exit(EXIT_SUCCESS);
 340         case XK_Right:
 341                 if(text[cursor] != '\0') {
 342                         cursor = nextrune(+1);
 343                         break;
 344                 }
 345                 /* fallthrough */
 346         case XK_Down:
 347                 if(sel && sel->right && (sel = sel->right) == next) {
 348                         curr = next;
 349                         calcoffsets();
 350                 }
 351                 break;
 352         case XK_Tab:
 353                 if(!sel)
 354                         return;
 355                 strncpy(text, sel->text, sizeof text);
 356                 cursor = strlen(text);
 357                 match(True);
 358                 break;
 359         }
 360         drawmenu();
 361 }
 362
 363 void
 364 match(Bool sub) {
 365         size_t len = strlen(text);
 366         Item *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
 367         Item *item, *lnext;
 368
 369         lexact = lprefix = lsubstr = exactend = prefixend = substrend = NULL;
 370         for(item = sub ? matches : items; item && item->text; item = lnext) {
 371                 lnext = sub ? item->right : item + 1;
 372                 if(!fstrncmp(text, item->text, len + 1))
 373                         appenditem(item, &lexact, &exactend);
 374                 else if(!fstrncmp(text, item->text, len))
 375                         appenditem(item, &lprefix, &prefixend);
 376                 else if(fstrstr(item->text, text))
 377                         appenditem(item, &lsubstr, &substrend);
 378         }
 379         matches = lexact;
 380         matchend = exactend;
 381
 382         if(lprefix) {
 383                 if(matchend) {
 384                         matchend->right = lprefix;
 385                         lprefix->left = matchend;
 386                 }
 387                 else
 388                         matches = lprefix;
 389                 matchend = prefixend;
 390         }
 391         if(lsubstr) {
 392                 if(matchend) {
 393                         matchend->right = lsubstr;
 394                         lsubstr->left = matchend;
 395                 }
 396                 else
 397                         matches = lsubstr;
 398                 matchend = substrend;
 399         }
 400         curr = sel = matches;
 401         calcoffsets();
 402 }
 403
 404 size_t
 405 nextrune(int inc) {
 406         ssize_t n;
 407
 408         for(n = cursor + inc; n + inc >= 0 && (text[n] & 0xc0) == 0x80; n += inc);
 409         return n;
 410 }
 411
 412 void
 413 paste(void) {
 414         char *p, *q;
 415         int di;
 416         unsigned long dl;
 417         Atom da;
 418
 419         XGetWindowProperty(dc->dpy, win, utf8, 0, (sizeof text / 4) + 1, False,
 420                            utf8, &da, &di, &dl, &dl, (unsigned char **)&p);
 421         insert(p, (q = strchr(p, '\n')) ? q-p : (ssize_t)strlen(p));
 422         XFree(p);
 423         drawmenu();
 424 }
 425
 426 void
 427 readstdin(void) {
 428         char buf[sizeof text], *p, *maxstr = NULL;
 429         size_t i, max = 0, size = 0;
 430
 431         for(i = 0; fgets(buf, sizeof buf, stdin); i++) {
 432                 if(i+1 >= size / sizeof *items)
 433                         if(!(items = realloc(items, (size += BUFSIZ))))
 434                                 eprintf("cannot realloc %u bytes:", size);
 435                 if((p = strchr(buf, '\n')))
 436                         *p = '\0';
 437                 if(!(items[i].text = strdup(buf)))
 438                         eprintf("cannot strdup %u bytes:", strlen(buf)+1);
 439                 if(strlen(items[i].text) > max)
 440                         max = strlen(maxstr = items[i].text);
 441         }
 442         if(items)
 443                 items[i].text = NULL;
 444         inputw = maxstr ? textw(dc, maxstr) : 0;
 445 }
 446
 447 void
 448 run(void) {
 449         XEvent ev;
 450
 451         while(!XNextEvent(dc->dpy, &ev))
 452                 switch(ev.type) {
 453                 case Expose:
 454                         if(ev.xexpose.count == 0)
 455                                 mapdc(dc, win, mw, mh);
 456                         break;
 457                 case KeyPress:
 458                         keypress(&ev.xkey);
 459                         break;
 460                 case SelectionNotify:
 461                         if(ev.xselection.property == utf8)
 462                                 paste();
 463                         break;
 464                 case VisibilityNotify:
 465                         if(ev.xvisibility.state != VisibilityUnobscured)
 466                                 XRaiseWindow(dc->dpy, win);
 467                         break;
 468                 }
 469 }
 470
 471 void
 472 setup(void) {
 473         int x, y, screen = DefaultScreen(dc->dpy);
 474         Window root = RootWindow(dc->dpy, screen);
 475         XSetWindowAttributes wa;
 476 #ifdef XINERAMA
 477         int n;
 478         XineramaScreenInfo *info;
 479 #endif
 480
 481         normcol[ColBG] = getcolor(dc, normbgcolor);
 482         normcol[ColFG] = getcolor(dc, normfgcolor);
 483         selcol[ColBG]  = getcolor(dc, selbgcolor);
 484         selcol[ColFG]  = getcolor(dc, selfgcolor);
 485
 486         utf8 = XInternAtom(dc->dpy, "UTF8_STRING", False);
 487
 488         /* menu geometry */
 489         bh = dc->font.height + 2;
 490         lines = MAX(lines, 0);
 491         mh = (lines + 1) * bh;
 492 #ifdef XINERAMA
 493         if((info = XineramaQueryScreens(dc->dpy, &n))) {
 494                 int i, di;
 495                 unsigned int du;
 496                 Window dw;
 497
 498                 XQueryPointer(dc->dpy, root, &dw, &dw, &x, &y, &di, &di, &du);
 499                 for(i = 0; i < n-1; i++)
 500                         if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
 501                                 break;
 502                 x = info[i].x_org;
 503                 y = info[i].y_org + (topbar ? 0 : info[i].height - mh);
 504                 mw = info[i].width;
 505                 XFree(info);
 506         }
 507         else
 508 #endif
 509         {
 510                 x = 0;
 511                 y = topbar ? 0 : DisplayHeight(dc->dpy, screen) - mh;
 512                 mw = DisplayWidth(dc->dpy, screen);
 513         }
 514         promptw = prompt ? textw(dc, prompt) : 0;
 515         inputw = MIN(inputw, mw/3);
 516         match(False);
 517
 518         /* menu window */
 519         wa.override_redirect = True;
 520         wa.background_pixmap = ParentRelative;
 521         wa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
 522         win = XCreateWindow(dc->dpy, root, x, y, mw, mh, 0,
 523                             DefaultDepth(dc->dpy, screen), CopyFromParent,
 524                             DefaultVisual(dc->dpy, screen),
 525                             CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 526
 527         XMapRaised(dc->dpy, win);
 528         resizedc(dc, mw, mh);
 529         drawmenu();
 530 }
 531
 532 void
 533 usage(void) {
 534         fputs("usage: dmenu [-b] [-f] [-i] [-l lines] [-p prompt] [-fn font]\n"
 535               "             [-nb color] [-nf color] [-sb color] [-sf color] [-v]\n", stderr);
 536         exit(EXIT_FAILURE);
 537 }