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         Bool fast = False;
  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", © 2006-2011 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(!strcmp(argv[i], "-f"))
  82                         fast = True;
  83                 else if(i == argc-1)
  84                         goto usage;
  85                 /* double flags */
  86                 else if(!strcmp(argv[i], "-l"))
  87                         lines = atoi(argv[++i]);
  88                 else if(!strcmp(argv[i], "-m"))
  89                         monitor = atoi(argv[++i]);
  90                 else if(!strcmp(argv[i], "-p"))
  91                         prompt = argv[++i];
  92                 else if(!strcmp(argv[i], "-fn"))
  93                         font = argv[++i];
  94                 else if(!strcmp(argv[i], "-nb"))
  95                         normbgcolor = argv[++i];
  96                 else if(!strcmp(argv[i], "-nf"))
  97                         normfgcolor = argv[++i];
  98                 else if(!strcmp(argv[i], "-sb"))
  99                         selbgcolor = argv[++i];
 100                 else if(!strcmp(argv[i], "-sf"))
 101                         selfgcolor = argv[++i];
 102                 else
 103                         goto usage;
 104
 105         dc = initdc();
 106         initfont(dc, font);
 107
 108         if(fast) {
 109                 setup();
 110                 readstdin();
 111         }
 112         else {
 113                 readstdin();
 114                 setup();
 115         }
 116         match();
 117         run();
 118         return EXIT_FAILURE;
 119
 120 usage:
 121         fputs("usage: dmenu [-b] [-f] [-i] [-l lines] [-m monitor] [-p prompt] [-fn font]\n"
 122               "             [-nb color] [-nf color] [-sb color] [-sf color] [-v]\n", stderr);
 123         return EXIT_FAILURE;
 124 }
 125
 126 void
 127 appenditem(Item *item, Item **list, Item **last) {
 128         if(!*last)
 129                 *list = item;
 130         else
 131                 (*last)->right = item;
 132         item->left = *last;
 133         item->right = NULL;
 134         *last = item;
 135 }
 136
 137 void
 138 calcoffsets(void) {
 139         unsigned int i, n;
 140
 141         if(lines > 0)
 142                 n = lines * bh;
 143         else
 144                 n = mw - (promptw + inputw + textw(dc, "<") + textw(dc, ">"));
 145
 146         for(i = 0, next = curr; next; next = next->right)
 147                 if((i += (lines > 0) ? bh : MIN(textw(dc, next->text), n)) > n)
 148                         break;
 149         for(i = 0, prev = curr; prev && prev->left; prev = prev->left)
 150                 if((i += (lines > 0) ? bh : MIN(textw(dc, prev->left->text), n)) > n)
 151                         break;
 152 }
 153
 154 void
 155 drawmenu(void) {
 156         int curpos;
 157         Item *item;
 158
 159         dc->x = 0;
 160         dc->y = 0;
 161         dc->h = bh;
 162         drawrect(dc, 0, 0, mw, mh, True, BG(dc, normcol));
 163
 164         if(prompt) {
 165                 dc->w = promptw;
 166                 drawtext(dc, prompt, selcol);
 167                 dc->x = dc->w;
 168         }
 169         dc->w = (lines > 0 || !matches) ? mw - dc->x : inputw;
 170         drawtext(dc, text, normcol);
 171         if((curpos = textnw(dc, text, cursor) + dc->h/2 - 2) < dc->w)
 172                 drawrect(dc, curpos, 2, 1, dc->h - 4, True, FG(dc, normcol));
 173
 174         if(lines > 0) {
 175                 dc->w = mw - dc->x;
 176                 for(item = curr; item != next; item = item->right) {
 177                         dc->y += dc->h;
 178                         drawtext(dc, item->text, (item == sel) ? selcol : normcol);
 179                 }
 180         }
 181         else if(matches) {
 182                 dc->x += inputw;
 183                 dc->w = textw(dc, "<");
 184                 if(curr->left)
 185                         drawtext(dc, "<", normcol);
 186                 for(item = curr; item != next; item = item->right) {
 187                         dc->x += dc->w;
 188                         dc->w = MIN(textw(dc, item->text), mw - dc->x - textw(dc, ">"));
 189                         drawtext(dc, item->text, (item == sel) ? selcol : normcol);
 190                 }
 191                 dc->w = textw(dc, ">");
 192                 dc->x = mw - dc->w;
 193                 if(next)
 194                         drawtext(dc, ">", normcol);
 195         }
 196         mapdc(dc, win, mw, mh);
 197 }
 198
 199 char *
 200 fstrstr(const char *s, const char *sub) {
 201         size_t len;
 202
 203         for(len = strlen(sub); *s; s++)
 204                 if(!fstrncmp(s, sub, len))
 205                         return (char *)s;
 206         return NULL;
 207 }
 208
 209 void
 210 grabkeyboard(void) {
 211         int i;
 212
 213         for(i = 0; i < 1000; i++) {
 214                 if(!XGrabKeyboard(dc->dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime))
 215                         return;
 216                 usleep(1000);
 217         }
 218         eprintf("cannot grab keyboard\n");
 219 }
 220
 221 void
 222 insert(const char *s, ssize_t n) {
 223         if(strlen(text) + n > sizeof text - 1)
 224                 return;
 225         memmove(text + cursor + n, text + cursor, sizeof text - cursor - MAX(n, 0));
 226         if(n > 0)
 227                 memcpy(text + cursor, s, n);
 228         cursor += n;
 229         match();
 230 }
 231
 232 void
 233 keypress(XKeyEvent *ev) {
 234         char buf[32];
 235         size_t len;
 236         KeySym ksym;
 237
 238         len = strlen(text);
 239         XLookupString(ev, buf, sizeof buf, &ksym, NULL);
 240         if(ev->state & ControlMask)
 241                 switch(tolower(ksym)) {
 242                 default:
 243                         return;
 244                 case XK_a:
 245                         ksym = XK_Home;
 246                         break;
 247                 case XK_b:
 248                         ksym = XK_Left;
 249                         break;
 250                 case XK_c:
 251                         ksym = XK_Escape;
 252                         break;
 253                 case XK_d:
 254                         ksym = XK_Delete;
 255                         break;
 256                 case XK_e:
 257                         ksym = XK_End;
 258                         break;
 259                 case XK_f:
 260                         ksym = XK_Right;
 261                         break;
 262                 case XK_h:
 263                         ksym = XK_BackSpace;
 264                         break;
 265                 case XK_i:
 266                         ksym = XK_Tab;
 267                         break;
 268                 case XK_j:
 269                         ksym = XK_Return;
 270                         break;
 271                 case XK_k:  /* delete right */
 272                         text[cursor] = '\0';
 273                         match();
 274                         break;
 275                 case XK_n:
 276                         ksym = XK_Down;
 277                         break;
 278                 case XK_p:
 279                         ksym = XK_Up;
 280                         break;
 281                 case XK_u:  /* delete left */
 282                         insert(NULL, 0 - cursor);
 283                         break;
 284                 case XK_w:  /* delete word */
 285                         while(cursor > 0 && text[nextrune(-1)] == ' ')
 286                                 insert(NULL, nextrune(-1) - cursor);
 287                         while(cursor > 0 && text[nextrune(-1)] != ' ')
 288                                 insert(NULL, nextrune(-1) - cursor);
 289                         break;
 290                 case XK_y:  /* paste selection */
 291                         XConvertSelection(dc->dpy, XA_PRIMARY, utf8, utf8, win, CurrentTime);
 292                         return;
 293                 }
 294         switch(ksym) {
 295         default:
 296                 if(!iscntrl(*buf))
 297                         insert(buf, strlen(buf));
 298                 break;
 299         case XK_Delete:
 300                 if(cursor == len)
 301                         return;
 302                 cursor = nextrune(+1);
 303         case XK_BackSpace:
 304                 if(cursor > 0)
 305                         insert(NULL, nextrune(-1) - cursor);
 306                 break;
 307         case XK_End:
 308                 if(cursor < len) {
 309                         cursor = len;
 310                         break;
 311                 }
 312                 while(next) {
 313                         sel = curr = next;
 314                         calcoffsets();
 315                 }
 316                 while(sel && sel->right)
 317                         sel = sel->right;
 318                 break;
 319         case XK_Escape:
 320                 exit(EXIT_FAILURE);
 321         case XK_Home:
 322                 if(sel == matches) {
 323                         cursor = 0;
 324                         break;
 325                 }
 326                 sel = curr = matches;
 327                 calcoffsets();
 328                 break;
 329         case XK_Left:
 330                 if(cursor > 0 && (!sel || !sel->left || lines > 0)) {
 331                         cursor = nextrune(-1);
 332                         break;
 333                 }
 334                 else if(lines > 0)
 335                         return;
 336         case XK_Up:
 337                 if(sel && sel->left && (sel = sel->left)->right == curr) {
 338                         curr = prev;
 339                         calcoffsets();
 340                 }
 341                 break;
 342         case XK_Next:
 343                 if(!next)
 344                         return;
 345                 sel = curr = next;
 346                 calcoffsets();
 347                 break;
 348         case XK_Prior:
 349                 if(!prev)
 350                         return;
 351                 sel = curr = prev;
 352                 calcoffsets();
 353                 break;
 354         case XK_Return:
 355         case XK_KP_Enter:
 356                 fputs((sel && !(ev->state & ShiftMask)) ? sel->text : text, stdout);
 357                 exit(EXIT_SUCCESS);
 358         case XK_Right:
 359                 if(cursor < len) {
 360                         cursor = nextrune(+1);
 361                         break;
 362                 }
 363                 else if(lines > 0)
 364                         return;
 365         case XK_Down:
 366                 if(sel && sel->right && (sel = sel->right) == next) {
 367                         curr = next;
 368                         calcoffsets();
 369                 }
 370                 break;
 371         case XK_Tab:
 372                 if(!sel)
 373                         return;
 374                 strncpy(text, sel->text, sizeof text);
 375                 cursor = strlen(text);
 376                 match();
 377                 break;
 378         }
 379         drawmenu();
 380 }
 381
 382 void
 383 match(void) {
 384         size_t len;
 385         Item *item, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
 386
 387         len = strlen(text);
 388         matches = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
 389         for(item = items; item; item = item->next)
 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                 itemend = exactend;
 400         }
 401         if(lprefix) {
 402                 if(itemend) {
 403                         itemend->right = lprefix;
 404                         lprefix->left = itemend;
 405                 }
 406                 else
 407                         matches = lprefix;
 408                 itemend = prefixend;
 409         }
 410         if(lsubstr) {
 411                 if(itemend) {
 412                         itemend->right = lsubstr;
 413                         lsubstr->left = itemend;
 414                 }
 415                 else
 416                         matches = lsubstr;
 417         }
 418         curr = sel = matches;
 419         calcoffsets();
 420 }
 421
 422 size_t
 423 nextrune(int incr) {
 424         size_t n, len;
 425
 426         len = strlen(text);
 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;
 448         Item *item, **end;
 449
 450         for(end = &items; fgets(buf, sizeof buf, stdin); *end = item, end = &item->next) {
 451                 if((p = strchr(buf, '\n')))
 452                         *p = '\0';
 453                 if(!(item = calloc(1, sizeof *item)))
 454                         eprintf("cannot malloc %u bytes:", sizeof *item);
 455                 if(!(item->text = strdup(buf)))
 456                         eprintf("cannot strdup %u bytes:", strlen(buf)+1);
 457                 inputw = MAX(inputw, textw(dc, item->text));
 458         }
 459 }
 460
 461 void
 462 run(void) {
 463         XEvent ev;
 464
 465         while(!XNextEvent(dc->dpy, &ev))
 466                 switch(ev.type) {
 467                 case Expose:
 468                         if(ev.xexpose.count == 0)
 469                                 drawmenu();
 470                         break;
 471                 case KeyPress:
 472                         keypress(&ev.xkey);
 473                         break;
 474                 case SelectionNotify:
 475                         if(ev.xselection.property == utf8)
 476                                 paste();
 477                         break;
 478                 case VisibilityNotify:
 479                         if(ev.xvisibility.state != VisibilityUnobscured)
 480                                 XRaiseWindow(dc->dpy, win);
 481                         break;
 482                 }
 483 }
 484
 485 void
 486 setup(void) {
 487         int x, y, screen;
 488         XSetWindowAttributes wa;
 489 #ifdef XINERAMA
 490         int n;
 491         XineramaScreenInfo *info;
 492 #endif
 493
 494         screen = DefaultScreen(dc->dpy);
 495         root = RootWindow(dc->dpy, screen);
 496         utf8 = XInternAtom(dc->dpy, "UTF8_STRING", False);
 497
 498         normcol[ColBG] = getcolor(dc, normbgcolor);
 499         normcol[ColFG] = getcolor(dc, normfgcolor);
 500         selcol[ColBG] = getcolor(dc, selbgcolor);
 501         selcol[ColFG] = getcolor(dc, selfgcolor);
 502
 503         /* menu geometry */
 504         bh = dc->font.height + 2;
 505         lines = MAX(lines, 0);
 506         mh = (lines + 1) * bh;
 507 #ifdef XINERAMA
 508         if((info = XineramaQueryScreens(dc->dpy, &n))) {
 509                 int i, di;
 510                 unsigned int du;
 511                 Window dw;
 512
 513                 XQueryPointer(dc->dpy, root, &dw, &dw, &x, &y, &di, &di, &du);
 514                 for(i = 0; i < n; i++)
 515                         if((monitor == info[i].screen_number)
 516                         || (monitor < 0 && INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height)))
 517                                 break;
 518                 x = info[i].x_org;
 519                 y = info[i].y_org + (topbar ? 0 : info[i].height - mh);
 520                 mw = info[i].width;
 521                 XFree(info);
 522         }
 523         else
 524 #endif
 525         {
 526                 x = 0;
 527                 y = topbar ? 0 : DisplayHeight(dc->dpy, screen) - mh;
 528                 mw = DisplayWidth(dc->dpy, screen);
 529         }
 530         /* menu window */
 531         wa.override_redirect = True;
 532         wa.background_pixmap = ParentRelative;
 533         wa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
 534         win = XCreateWindow(dc->dpy, root, x, y, mw, mh, 0,
 535                             DefaultDepth(dc->dpy, screen), CopyFromParent,
 536                             DefaultVisual(dc->dpy, screen),
 537                             CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 538
 539         grabkeyboard();
 540         resizedc(dc, mw, mh);
 541         inputw = MIN(inputw, mw/3);
 542         promptw = prompt ? textw(dc, prompt) : 0;
 543         XMapRaised(dc->dpy, win);
 544 }