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 void drawmenu(void);
  29 static char *fstrstr(const char *s, const char *sub);
  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
  40 static char text[BUFSIZ] = "";
  41 static int bh, mw, mh;
  42 static int inputw;
  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, *matchend;
  60 static Item *prev, *curr, *next, *sel;
  61 static Window 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         for(i = 1; i < argc; i++)
  71                 /* single flags */
  72                 if(!strcmp(argv[i], "-v")) {
  73                         fputs("dmenu-"VERSION", © 2006-2011 dmenu engineers, see LICENSE for details\n", stdout);
  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                 else if(i+1 == argc)
  83                         goto usage;
  84                 /* double flags */
  85                 else if(!strcmp(argv[i], "-l"))
  86                         lines = atoi(argv[++i]);
  87                 else if(!strcmp(argv[i], "-m"))
  88                         monitor = 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                         goto 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         return EXIT_FAILURE;
 118
 119 usage:
 120         fputs("usage: dmenu [-b] [-f] [-i] [-l lines] [-m monitor] [-p prompt] [-fn font]\n"
 121               "             [-nb color] [-nf color] [-sb color] [-sf color] [-v]\n", stderr);
 122         return EXIT_FAILURE;
 123 }
 124
 125 void
 126 appenditem(Item *item, Item **list, Item **last) {
 127         if(!*last)
 128                 *list = item;
 129         else
 130                 (*last)->right = item;
 131         item->left = *last;
 132         item->right = NULL;
 133         *last = item;
 134 }
 135
 136 void
 137 calcoffsets(void) {
 138         int i, n;
 139
 140         if(lines > 0)
 141                 n = lines * bh;
 142         else
 143                 n = mw - (promptw + inputw + textw(dc, "<") + textw(dc, ">"));
 144
 145         for(i = 0, next = curr; next; next = next->right)
 146                 if((i += (lines > 0) ? bh : MIN(textw(dc, next->text), n)) > n)
 147                         break;
 148         for(i = 0, prev = curr; prev && prev->left; prev = prev->left)
 149                 if((i += (lines > 0) ? bh : MIN(textw(dc, prev->left->text), n)) > n)
 150                         break;
 151 }
 152
 153 void
 154 drawmenu(void) {
 155         int curpos;
 156         Item *item;
 157
 158         dc->x = 0;
 159         dc->y = 0;
 160         dc->h = bh;
 161         drawrect(dc, 0, 0, mw, mh, True, BG(dc, normcol));
 162
 163         if(prompt) {
 164                 dc->w = promptw;
 165                 drawtext(dc, prompt, selcol);
 166                 dc->x = dc->w;
 167         }
 168         dc->w = (lines > 0 || !matches) ? mw - dc->x : inputw;
 169         drawtext(dc, text, normcol);
 170         if((curpos = textnw(dc, text, cursor) + dc->h/2 - 2) < dc->w)
 171                 drawrect(dc, curpos, 2, 1, dc->h - 4, True, FG(dc, normcol));
 172
 173         if(lines > 0) {
 174                 dc->w = mw - dc->x;
 175                 for(item = curr; item != next; item = item->right) {
 176                         dc->y += dc->h;
 177                         drawtext(dc, item->text, (item == sel) ? selcol : normcol);
 178                 }
 179         }
 180         else if(matches) {
 181                 dc->x += inputw;
 182                 dc->w = textw(dc, "<");
 183                 if(curr->left)
 184                         drawtext(dc, "<", normcol);
 185                 for(item = curr; item != next; item = item->right) {
 186                         dc->x += dc->w;
 187                         dc->w = MIN(textw(dc, item->text), mw - dc->x - textw(dc, ">"));
 188                         drawtext(dc, item->text, (item == sel) ? selcol : normcol);
 189                 }
 190                 dc->w = textw(dc, ">");
 191                 dc->x = mw - dc->w;
 192                 if(next)
 193                         drawtext(dc, ">", normcol);
 194         }
 195         mapdc(dc, win, mw, mh);
 196 }
 197
 198 char *
 199 fstrstr(const char *s, const char *sub) {
 200         size_t len;
 201
 202         for(len = strlen(sub); *s; s++)
 203                 if(!fstrncmp(s, sub, len))
 204                         return (char *)s;
 205         return NULL;
 206 }
 207
 208 void
 209 grabkeyboard(void) {
 210         int i;
 211
 212         for(i = 0; i < 1000; i++) {
 213                 if(XGrabKeyboard(dc->dpy, DefaultRootWindow(dc->dpy), True,
 214                                  GrabModeAsync, GrabModeAsync, CurrentTime) == GrabSuccess)
 215                         return;
 216                 usleep(1000);
 217         }
 218         eprintf("cannot grab keyboard\n");
 219 }
 220
 221 void
 222 insert(const char *str, 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], str, n);
 228         cursor += n;
 229         match(n > 0);
 230 }
 231
 232 void
 233 keypress(XKeyEvent *ev) {
 234         char buf[32];
 235         KeySym ksym;
 236
 237         XLookupString(ev, buf, sizeof buf, &ksym, NULL);
 238         if(ev->state & ControlMask) {
 239                 KeySym lower, upper;
 240
 241                 XConvertCase(ksym, &lower, &upper);
 242                 switch(lower) {
 243                 default:
 244                         return;
 245                 case XK_a:
 246                         ksym = XK_Home;
 247                         break;
 248                 case XK_b:
 249                         ksym = XK_Left;
 250                         break;
 251                 case XK_c:
 252                         ksym = XK_Escape;
 253                         break;
 254                 case XK_d:
 255                         ksym = XK_Delete;
 256                         break;
 257                 case XK_e:
 258                         ksym = XK_End;
 259                         break;
 260                 case XK_f:
 261                         ksym = XK_Right;
 262                         break;
 263                 case XK_h:
 264                         ksym = XK_BackSpace;
 265                         break;
 266                 case XK_i:
 267                         ksym = XK_Tab;
 268                         break;
 269                 case XK_j:
 270                         ksym = XK_Return;
 271                         break;
 272                 case XK_k:  /* delete right */
 273                         text[cursor] = '\0';
 274                         match(False);
 275                         break;
 276                 case XK_n:
 277                         ksym = XK_Down;
 278                         break;
 279                 case XK_p:
 280                         ksym = XK_Up;
 281                         break;
 282                 case XK_u:  /* delete left */
 283                         insert(NULL, 0 - cursor);
 284                         break;
 285                 case XK_w:  /* delete word */
 286                         while(cursor > 0 && text[nextrune(-1)] == ' ')
 287                                 insert(NULL, nextrune(-1) - cursor);
 288                         while(cursor > 0 && text[nextrune(-1)] != ' ')
 289                                 insert(NULL, nextrune(-1) - cursor);
 290                         break;
 291                 case XK_y:  /* paste selection */
 292                         XConvertSelection(dc->dpy, XA_PRIMARY, utf8, utf8, win, CurrentTime);
 293                         return;
 294                 }
 295         }
 296         switch(ksym) {
 297         default:
 298                 if(!iscntrl(*buf))
 299                         insert(buf, strlen(buf));
 300                 break;
 301         case XK_Delete:
 302                 if(text[cursor] == '\0')
 303                         return;
 304                 cursor = nextrune(+1);
 305         case XK_BackSpace:
 306                 if(cursor > 0)
 307                         insert(NULL, nextrune(-1) - cursor);
 308                 break;
 309         case XK_End:
 310                 if(text[cursor] != '\0') {
 311                         cursor = strlen(text);
 312                         break;
 313                 }
 314                 if(next) {
 315                         curr = matchend;
 316                         calcoffsets();
 317                         curr = prev;
 318                         calcoffsets();
 319                         while(next && (curr = curr->right))
 320                                 calcoffsets();
 321                 }
 322                 sel = matchend;
 323                 break;
 324         case XK_Escape:
 325                 exit(EXIT_FAILURE);
 326         case XK_Home:
 327                 if(sel == matches) {
 328                         cursor = 0;
 329                         break;
 330                 }
 331                 sel = curr = matches;
 332                 calcoffsets();
 333                 break;
 334         case XK_Left:
 335                 if(cursor > 0 && (!sel || !sel->left || lines > 0)) {
 336                         cursor = nextrune(-1);
 337                         break;
 338                 }
 339                 else if(lines > 0)
 340                         return;
 341         case XK_Up:
 342                 if(sel && sel->left && (sel = sel->left)->right == curr) {
 343                         curr = prev;
 344                         calcoffsets();
 345                 }
 346                 break;
 347         case XK_Next:
 348                 if(!next)
 349                         return;
 350                 sel = curr = next;
 351                 calcoffsets();
 352                 break;
 353         case XK_Prior:
 354                 if(!prev)
 355                         return;
 356                 sel = curr = prev;
 357                 calcoffsets();
 358                 break;
 359         case XK_Return:
 360         case XK_KP_Enter:
 361                 fputs((sel && !(ev->state & ShiftMask)) ? sel->text : text, stdout);
 362                 exit(EXIT_SUCCESS);
 363         case XK_Right:
 364                 if(text[cursor] != '\0') {
 365                         cursor = nextrune(+1);
 366                         break;
 367                 }
 368                 else if(lines > 0)
 369                         return;
 370         case XK_Down:
 371                 if(sel && sel->right && (sel = sel->right) == next) {
 372                         curr = next;
 373                         calcoffsets();
 374                 }
 375                 break;
 376         case XK_Tab:
 377                 if(!sel)
 378                         return;
 379                 strncpy(text, sel->text, sizeof text);
 380                 cursor = strlen(text);
 381                 match(True);
 382                 break;
 383         }
 384         drawmenu();
 385 }
 386
 387 void
 388 match(Bool sub) {
 389         size_t len = strlen(text);
 390         Item *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
 391         Item *item, *lnext;
 392
 393         lexact = lprefix = lsubstr = exactend = prefixend = substrend = NULL;
 394         for(item = sub ? matches : items; item && item->text; item = lnext) {
 395                 lnext = sub ? item->right : item + 1;
 396                 if(!fstrncmp(text, item->text, len + 1))
 397                         appenditem(item, &lexact, &exactend);
 398                 else if(!fstrncmp(text, item->text, len))
 399                         appenditem(item, &lprefix, &prefixend);
 400                 else if(fstrstr(item->text, text))
 401                         appenditem(item, &lsubstr, &substrend);
 402         }
 403         matches = lexact;
 404         matchend = exactend;
 405
 406         if(lprefix) {
 407                 if(matchend) {
 408                         matchend->right = lprefix;
 409                         lprefix->left = matchend;
 410                 }
 411                 else
 412                         matches = lprefix;
 413                 matchend = prefixend;
 414         }
 415         if(lsubstr) {
 416                 if(matchend) {
 417                         matchend->right = lsubstr;
 418                         lsubstr->left = matchend;
 419                 }
 420                 else
 421                         matches = lsubstr;
 422                 matchend = substrend;
 423         }
 424         curr = sel = matches;
 425         calcoffsets();
 426 }
 427
 428 size_t
 429 nextrune(int inc) {
 430         ssize_t n;
 431
 432         for(n = cursor + inc; n + inc >= 0 && (text[n] & 0xc0) == 0x80; n += inc);
 433         return n;
 434 }
 435
 436 void
 437 paste(void) {
 438         char *p, *q;
 439         int di;
 440         unsigned long dl;
 441         Atom da;
 442
 443         XGetWindowProperty(dc->dpy, win, utf8, 0, (sizeof text / 4) + 1, False,
 444                            utf8, &da, &di, &dl, &dl, (unsigned char **)&p);
 445         insert(p, (q = strchr(p, '\n')) ? q-p : (ssize_t)strlen(p));
 446         XFree(p);
 447         drawmenu();
 448 }
 449
 450 void
 451 readstdin(void) {
 452         char buf[sizeof text], *p, *maxstr = NULL;
 453         size_t i, max = 0, size = 0;
 454
 455         for(i = 0; fgets(buf, sizeof buf, stdin); items[++i].text = NULL) {
 456                 if(i+1 >= size / sizeof *items)
 457                         if(!(items = realloc(items, (size += BUFSIZ))))
 458                                 eprintf("cannot realloc %u bytes:", size);
 459                 if((p = strchr(buf, '\n')))
 460                         *p = '\0';
 461                 if(!(items[i].text = strdup(buf)))
 462                         eprintf("cannot strdup %u bytes:", strlen(buf)+1);
 463                 if(strlen(items[i].text) > max)
 464                         max = strlen(maxstr = items[i].text);
 465         }
 466         inputw = maxstr ? textw(dc, maxstr) : 0;
 467 }
 468
 469 void
 470 run(void) {
 471         XEvent ev;
 472
 473         while(!XNextEvent(dc->dpy, &ev))
 474                 switch(ev.type) {
 475                 case Expose:
 476                         if(ev.xexpose.count == 0)
 477                                 drawmenu();
 478                         break;
 479                 case KeyPress:
 480                         keypress(&ev.xkey);
 481                         break;
 482                 case SelectionNotify:
 483                         if(ev.xselection.property == utf8)
 484                                 paste();
 485                         break;
 486                 case VisibilityNotify:
 487                         if(ev.xvisibility.state != VisibilityUnobscured)
 488                                 XRaiseWindow(dc->dpy, win);
 489                         break;
 490                 }
 491 }
 492
 493 void
 494 setup(void) {
 495         int x, y, screen = DefaultScreen(dc->dpy);
 496         Window root = RootWindow(dc->dpy, screen);
 497         XSetWindowAttributes wa;
 498 #ifdef XINERAMA
 499         int n;
 500         XineramaScreenInfo *info;
 501 #endif
 502
 503         normcol[ColBG] = getcolor(dc, normbgcolor);
 504         normcol[ColFG] = getcolor(dc, normfgcolor);
 505         selcol[ColBG]  = getcolor(dc, selbgcolor);
 506         selcol[ColFG]  = getcolor(dc, selfgcolor);
 507
 508         utf8 = XInternAtom(dc->dpy, "UTF8_STRING", False);
 509
 510         /* menu geometry */
 511         bh = dc->font.height + 2;
 512         lines = MAX(lines, 0);
 513         mh = (lines + 1) * bh;
 514 #ifdef XINERAMA
 515         if((info = XineramaQueryScreens(dc->dpy, &n))) {
 516                 int i, di;
 517                 unsigned int du;
 518                 Window dw;
 519
 520                 XQueryPointer(dc->dpy, root, &dw, &dw, &x, &y, &di, &di, &du);
 521                 for(i = 0; i < n-1; i++)
 522                         if((monitor == info[i].screen_number)
 523                         || (monitor < 0 && INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height)))
 524                                 break;
 525                 x = info[i].x_org;
 526                 y = info[i].y_org + (topbar ? 0 : info[i].height - mh);
 527                 mw = info[i].width;
 528                 XFree(info);
 529         }
 530         else
 531 #endif
 532         {
 533                 x = 0;
 534                 y = topbar ? 0 : DisplayHeight(dc->dpy, screen) - mh;
 535                 mw = DisplayWidth(dc->dpy, screen);
 536         }
 537         inputw = MIN(inputw, mw/3);
 538         promptw = prompt ? textw(dc, prompt) : 0;
 539         match(False);
 540
 541         /* menu window */
 542         wa.override_redirect = True;
 543         wa.background_pixmap = ParentRelative;
 544         wa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
 545         win = XCreateWindow(dc->dpy, root, x, y, mw, mh, 0,
 546                             DefaultDepth(dc->dpy, screen), CopyFromParent,
 547                             DefaultVisual(dc->dpy, screen),
 548                             CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 549
 550         XMapRaised(dc->dpy, win);
 551         resizedc(dc, mw, mh);
 552         drawmenu();
 553 }