dmenu.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include <ctype.h>
   3 #include <locale.h>
   4 #include <stdarg.h>
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <strings.h>
   9 #include <unistd.h>
  10 #include <X11/keysym.h>
  11 #include <X11/Xlib.h>
  12 #include <X11/Xutil.h>
  13 #ifdef XINERAMA
  14 #include <X11/extensions/Xinerama.h>
  15 #endif
  16
  17 /* macros */
  18 #define CLEANMASK(mask)         (mask & ~(numlockmask | LockMask))
  19 #define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
  20 #define MIN(a, b)               ((a) < (b) ? (a) : (b))
  21 #define MAX(a, b)               ((a) > (b) ? (a) : (b))
  22 #define IS_UTF8_1ST_CHAR(c)     ((((c) & 0xc0) == 0xc0) || !((c) & 0x80))
  23
  24 typedef struct Item Item;
  25 struct Item {
  26         char *text;
  27         Item *next;         /* traverses all items */
  28         Item *left, *right; /* traverses items matching current search pattern */
  29 };
  30
  31 /* forward declarations */
  32 static void appenditem(Item *i, Item **list, Item **last);
  33 static void calcoffsetsh(void);
  34 static void calcoffsetsv(void);
  35 static char *cistrstr(const char *s, const char *sub);
  36 static void cleanup(void);
  37 static void drawmenu(void);
  38 static void drawmenuh(void);
  39 static void drawmenuv(void);
  40 static void eprint(const char *errstr, ...);
  41 static Bool grabkeyboard(void);
  42 static void kpress(XKeyEvent * e);
  43 static void match(char *pattern);
  44 static void readstdin(void);
  45 static void run(void);
  46 static void setup(Bool topbar);
  47
  48 #include "config.h"
  49
  50 /* variables */
  51 static char *maxname = NULL;
  52 static char *prompt = NULL;
  53 static char text[4096];
  54 static int cmdw = 0;
  55 static int promptw = 0;
  56 static int ret = 0;
  57 static int screen;
  58 static unsigned int mw, mh;
  59 static unsigned int numlockmask = 0;
  60 static Bool running = True;
  61 static Display *dpy;
  62 static Item *allitems = NULL;  /* first of all items */
  63 static Item *item = NULL;      /* first of pattern matching items */
  64 static Item *sel = NULL;
  65 static Item *next = NULL;
  66 static Item *prev = NULL;
  67 static Item *curr = NULL;
  68 static Window parent, win;
  69 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
  70 static char *(*fstrstr)(const char *, const char *) = strstr;
  71 static unsigned int lines = 0;
  72 static void (*calcoffsets)(void) = calcoffsetsh;
  73
  74 #include "draw.c"
  75
  76 void
  77 appenditem(Item *i, Item **list, Item **last) {
  78         if(!(*last))
  79                 *list = i;
  80         else
  81                 (*last)->right = i;
  82         i->left = *last;
  83         i->right = NULL;
  84         *last = i;
  85 }
  86
  87 void
  88 calcoffsetsh(void) {
  89         unsigned int w;
  90
  91         if(!curr)
  92                 return;
  93         w = promptw + cmdw + 2 * spaceitem;
  94         for(next = curr; next && w < mw; next=next->right)
  95                 w += MIN(textw(next->text), mw / 3);
  96         w = promptw + cmdw + 2 * spaceitem;
  97         for(prev = curr; prev && prev->left && w < mw; prev=prev->left)
  98                 w += MIN(textw(prev->left->text), mw / 3);
  99 }
 100
 101 void
 102 calcoffsetsv(void) {
 103         unsigned int h;
 104
 105         if(!curr)
 106                 return;
 107         h = (dc.font.height + 2) * lines;
 108         for(next = curr; next && h > 0; next = next->right)
 109                 h -= dc.font.height + 2;
 110         h = (dc.font.height + 2) * lines;
 111         for(prev = curr; prev && prev->left && h > 0; prev = prev->left)
 112                 h -= dc.font.height + 2;
 113 }
 114
 115 char *
 116 cistrstr(const char *s, const char *sub) {
 117         int c, csub;
 118         unsigned int len;
 119
 120         if(!sub)
 121                 return (char *)s;
 122         if((c = tolower(*sub++)) != '\0') {
 123                 len = strlen(sub);
 124                 do {
 125                         do {
 126                                 if((csub = *s++) == '\0')
 127                                         return NULL;
 128                         }
 129                         while(tolower(csub) != c);
 130                 }
 131                 while(strncasecmp(s, sub, len) != 0);
 132                 s--;
 133         }
 134         return (char *)s;
 135 }
 136
 137 void
 138 cleanup(void) {
 139         dccleanup();
 140         XDestroyWindow(dpy, win);
 141         XUngrabKeyboard(dpy, CurrentTime);
 142 }
 143
 144 void
 145 drawmenu(void) {
 146         dc.x = 0;
 147         dc.y = 0;
 148         dc.w = mw;
 149         dc.h = mh;
 150         drawtext(NULL, dc.norm);
 151         /* print prompt? */
 152         if(prompt) {
 153                 dc.w = promptw;
 154                 drawtext(prompt, dc.sel);
 155                 dc.x += dc.w;
 156         }
 157         dc.w = mw - dc.x;
 158         /* print command */
 159         if(cmdw && item && lines == 0)
 160                 dc.w = cmdw;
 161         drawtext(*text ? text : NULL, dc.norm);
 162         if(curr) {
 163                 if(lines > 0)
 164                         drawmenuv();
 165                 else
 166                         drawmenuh();
 167         }
 168         XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
 169         XFlush(dpy);
 170 }
 171
 172 void
 173 drawmenuh(void) {
 174         Item *i;
 175
 176         dc.x += cmdw;
 177         dc.w = spaceitem;
 178         drawtext(curr->left ? "<" : NULL, dc.norm);
 179         dc.x += dc.w;
 180         for(i = curr; i != next; i=i->right) {
 181                 dc.w = MIN(textw(i->text), mw / 3);
 182                 drawtext(i->text, (sel == i) ? dc.sel : dc.norm);
 183                 dc.x += dc.w;
 184         }
 185         dc.w = spaceitem;
 186         dc.x = mw - dc.w;
 187         drawtext(next ? ">" : NULL, dc.norm);
 188 }
 189
 190 void
 191 drawmenuv(void) {
 192         Item *i;
 193
 194         dc.w = mw - dc.x;
 195         dc.h = dc.font.height + 2;
 196         dc.y = dc.h;
 197         for(i = curr; i != next; i=i->right) {
 198                 drawtext(i->text, (sel == i) ? dc.sel : dc.norm);
 199                 dc.y += dc.h;
 200         }
 201         dc.h = mh - dc.y;
 202         drawtext(NULL, dc.norm);
 203 }
 204
 205 void
 206 eprint(const char *errstr, ...) {
 207         va_list ap;
 208
 209         va_start(ap, errstr);
 210         vfprintf(stderr, errstr, ap);
 211         va_end(ap);
 212         exit(EXIT_FAILURE);
 213 }
 214
 215 Bool
 216 grabkeyboard(void) {
 217         unsigned int len;
 218
 219         for(len = 1000; len; len--) {
 220                 if(XGrabKeyboard(dpy, parent, True, GrabModeAsync, GrabModeAsync, CurrentTime)
 221                 == GrabSuccess)
 222                         break;
 223                 usleep(1000);
 224         }
 225         return len > 0;
 226 }
 227
 228 void
 229 kpress(XKeyEvent * e) {
 230         char buf[sizeof text];
 231         int num;
 232         unsigned int i, len;
 233         KeySym ksym;
 234
 235         len = strlen(text);
 236         num = XLookupString(e, buf, sizeof buf, &ksym, NULL);
 237         if(ksym == XK_KP_Enter)
 238                 ksym = XK_Return;
 239         else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
 240                 ksym = (ksym - XK_KP_0) + XK_0;
 241         else if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
 242         || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
 243         || IsPrivateKeypadKey(ksym))
 244                 return;
 245         /* first check if a control mask is omitted */
 246         if(e->state & ControlMask) {
 247                 switch(tolower(ksym)) {
 248                 default:
 249                         return;
 250                 case XK_a:
 251                         ksym = XK_Home;
 252                         break;
 253                 case XK_b:
 254                         ksym = XK_Left;
 255                         break;
 256                 case XK_c:
 257                         ksym = XK_Escape;
 258                         break;
 259                 case XK_e:
 260                         ksym = XK_End;
 261                         break;
 262                 case XK_f:
 263                         ksym = XK_Right;
 264                         break;
 265                 case XK_h:
 266                         ksym = XK_BackSpace;
 267                         break;
 268                 case XK_i:
 269                         ksym = XK_Tab;
 270                         break;
 271                 case XK_j:
 272                         ksym = XK_Return;
 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:
 281                         text[0] = '\0';
 282                         match(text);
 283                         break;
 284                 case XK_w:
 285                         if(len == 0)
 286                                 return;
 287                         i = len;
 288                         while(i-- > 0 && text[i] == ' ');
 289                         while(i-- > 0 && text[i] != ' ');
 290                         text[++i] = '\0';
 291                         match(text);
 292                         break;
 293                 case XK_x:
 294                         execlp("dinput", "dinput", text, NULL); /* todo: argv */
 295                         eprint("dmenu: cannot exec dinput:");
 296                         break;
 297                 }
 298         }
 299         switch(ksym) {
 300         default:
 301                 num = MIN(num, sizeof text);
 302                 if(num && !iscntrl((int) buf[0])) {
 303                         memcpy(text + len, buf, num + 1);
 304                         len += num;
 305                         match(text);
 306                 }
 307                 break;
 308         case XK_BackSpace:
 309                 if(len == 0)
 310                         return;
 311                 for(i = 1; len - i > 0 && !IS_UTF8_1ST_CHAR(text[len - i]); i++);
 312                 len -= i;
 313                 text[len] = '\0';
 314                 match(text);
 315                 break;
 316         case XK_End:
 317                 while(next) {
 318                         sel = curr = next;
 319                         calcoffsets();
 320                 }
 321                 while(sel && sel->right)
 322                         sel = sel->right;
 323                 break;
 324         case XK_Escape:
 325                 ret = 1;
 326                 running = False;
 327                 return;
 328         case XK_Home:
 329                 sel = curr = item;
 330                 calcoffsets();
 331                 break;
 332         case XK_Left:
 333         case XK_Up:
 334                 if(!sel || !sel->left)
 335                         return;
 336                 sel = sel->left;
 337                 if(sel->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                 if((e->state & ShiftMask) || !sel)
 356                         fprintf(stdout, "%s", text);
 357                 else
 358                         fprintf(stdout, "%s", sel->text);
 359                 fflush(stdout);
 360                 running = False;
 361                 return;
 362         case XK_Right:
 363         case XK_Down:
 364                 if(!sel || !sel->right)
 365                         return;
 366                 sel = sel->right;
 367                 if(sel == next) {
 368                         curr = next;
 369                         calcoffsets();
 370                 }
 371                 break;
 372         case XK_Tab:
 373                 if(!sel)
 374                         return;
 375                 strncpy(text, sel->text, sizeof text);
 376                 match(text);
 377                 break;
 378         }
 379         drawmenu();
 380 }
 381
 382 void
 383 match(char *pattern) {
 384         unsigned int plen;
 385         Item *i, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
 386
 387         if(!pattern)
 388                 return;
 389         plen = strlen(pattern);
 390         item = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
 391         for(i = allitems; i; i = i->next)
 392                 if(!fstrncmp(pattern, i->text, plen + 1))
 393                         appenditem(i, &lexact, &exactend);
 394                 else if(!fstrncmp(pattern, i->text, plen))
 395                         appenditem(i, &lprefix, &prefixend);
 396                 else if(fstrstr(i->text, pattern))
 397                         appenditem(i, &lsubstr, &substrend);
 398         if(lexact) {
 399                 item = lexact;
 400                 itemend = exactend;
 401         }
 402         if(lprefix) {
 403                 if(itemend) {
 404                         itemend->right = lprefix;
 405                         lprefix->left = itemend;
 406                 }
 407                 else
 408                         item = lprefix;
 409                 itemend = prefixend;
 410         }
 411         if(lsubstr) {
 412                 if(itemend) {
 413                         itemend->right = lsubstr;
 414                         lsubstr->left = itemend;
 415                 }
 416                 else
 417                         item = lsubstr;
 418         }
 419         curr = prev = next = sel = item;
 420         calcoffsets();
 421 }
 422
 423 void
 424 readstdin(void) {
 425         char *p, buf[sizeof text];
 426         unsigned int len = 0, max = 0;
 427         Item *i, *new;
 428
 429         i = NULL;
 430         while(fgets(buf, sizeof buf, stdin)) {
 431                 len = strlen(buf);
 432                 if(buf[len-1] == '\n')
 433                         buf[--len] = '\0';
 434                 if(!(p = strdup(buf)))
 435                         eprint("dmenu: cannot strdup %u bytes\n", len);
 436                 if((max = MAX(max, len)) == len)
 437                         maxname = p;
 438                 if(!(new = malloc(sizeof *new)))
 439                         eprint("dmenu: cannot malloc %u bytes\n", sizeof *new);
 440                 new->next = new->left = new->right = NULL;
 441                 new->text = p;
 442                 if(!i)
 443                         allitems = new;
 444                 else
 445                         i->next = new;
 446                 i = new;
 447         }
 448 }
 449
 450 void
 451 run(void) {
 452         XEvent ev;
 453
 454         /* main event loop */
 455         while(running && !XNextEvent(dpy, &ev))
 456                 switch (ev.type) {
 457                 case KeyPress:
 458                         kpress(&ev.xkey);
 459                         break;
 460                 case Expose:
 461                         if(ev.xexpose.count == 0)
 462                                 drawmenu();
 463                         break;
 464                 case VisibilityNotify:
 465                         if (ev.xvisibility.state != VisibilityUnobscured)
 466                                 XRaiseWindow(dpy, win);
 467                         break;
 468                 }
 469 }
 470
 471 void
 472 setup(Bool topbar) {
 473         int i, j, x, y;
 474 #if XINERAMA
 475         int n;
 476         XineramaScreenInfo *info = NULL;
 477 #endif
 478         XModifierKeymap *modmap;
 479         XSetWindowAttributes wa;
 480         XWindowAttributes pwa;
 481
 482         /* init modifier map */
 483         modmap = XGetModifierMapping(dpy);
 484         for(i = 0; i < 8; i++)
 485                 for(j = 0; j < modmap->max_keypermod; j++) {
 486                         if(modmap->modifiermap[i * modmap->max_keypermod + j]
 487                         == XKeysymToKeycode(dpy, XK_Num_Lock))
 488                                 numlockmask = (1 << i);
 489                 }
 490         XFreeModifiermap(modmap);
 491
 492         initfont(font);
 493
 494         /* menu window */
 495         wa.override_redirect = True;
 496         wa.background_pixmap = ParentRelative;
 497         wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask | VisibilityChangeMask;
 498
 499         /* menu window geometry */
 500         mh = (dc.font.height + 2) * (lines + 1);
 501 #if XINERAMA
 502         if(parent == RootWindow(dpy, screen) && XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
 503                 i = 0;
 504                 if(n > 1) {
 505                         int di;
 506                         unsigned int dui;
 507                         Window dummy;
 508                         if(XQueryPointer(dpy, parent, &dummy, &dummy, &x, &y, &di, &di, &dui))
 509                                 for(i = 0; i < n; i++)
 510                                         if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
 511                                                 break;
 512                 }
 513                 x = info[i].x_org;
 514                 y = topbar ? info[i].y_org : info[i].y_org + info[i].height - mh;
 515                 mw = info[i].width;
 516                 XFree(info);
 517         }
 518         else
 519 #endif
 520         {
 521                 XGetWindowAttributes(dpy, parent, &pwa);
 522                 x = 0;
 523                 y = topbar ? 0 : pwa.height - mh;
 524                 mw = pwa.width;
 525         }
 526
 527         win = XCreateWindow(dpy, parent, x, y, mw, mh, 0,
 528                         DefaultDepth(dpy, screen), CopyFromParent,
 529                         DefaultVisual(dpy, screen),
 530                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 531
 532         dcsetup();
 533         if(maxname)
 534                 cmdw = MIN(textw(maxname), mw / 3);
 535         if(prompt)
 536                 promptw = MIN(textw(prompt), mw / 5);
 537         text[0] = '\0';
 538         match(text);
 539         XMapRaised(dpy, win);
 540 }
 541
 542 int
 543 main(int argc, char *argv[]) {
 544         unsigned int i;
 545         Bool topbar = True;
 546
 547         /* command line args */
 548         for(i = 1; i < argc; i++)
 549                 if(!strcmp(argv[i], "-i")) {
 550                         fstrncmp = strncasecmp;
 551                         fstrstr = cistrstr;
 552                 }
 553                 else if(!strcmp(argv[i], "-b"))
 554                         topbar = False;
 555                 else if(!strcmp(argv[i], "-e")) {
 556                         if(++i < argc) parent = atoi(argv[i]);
 557                 }
 558                 else if(!strcmp(argv[i], "-l")) {
 559                         if(++i < argc) lines = atoi(argv[i]);
 560                         if(lines > 0)
 561                                 calcoffsets = calcoffsetsv;
 562                 }
 563                 else if(!strcmp(argv[i], "-fn")) {
 564                         if(++i < argc) font = argv[i];
 565                 }
 566                 else if(!strcmp(argv[i], "-nb")) {
 567                         if(++i < argc) normbgcolor = argv[i];
 568                 }
 569                 else if(!strcmp(argv[i], "-nf")) {
 570                         if(++i < argc) normfgcolor = argv[i];
 571                 }
 572                 else if(!strcmp(argv[i], "-p")) {
 573                         if(++i < argc) prompt = argv[i];
 574                 }
 575                 else if(!strcmp(argv[i], "-sb")) {
 576                         if(++i < argc) selbgcolor = argv[i];
 577                 }
 578                 else if(!strcmp(argv[i], "-sf")) {
 579                         if(++i < argc) selfgcolor = argv[i];
 580                 }
 581                 else if(!strcmp(argv[i], "-v"))
 582                         eprint("dmenu-"VERSION", © 2006-2010 dmenu engineers, see LICENSE for details\n");
 583                 else
 584                         eprint("usage: dmenu [-i] [-b] [-e <xid>] [-l <lines>] [-fn <font>] [-nb <color>]\n"
 585                                "             [-nf <color>] [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n");
 586         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 587                 fprintf(stderr, "dmenu: warning: no locale support\n");
 588         if(!(dpy = XOpenDisplay(NULL)))
 589                 eprint("dmenu: cannot open display\n");
 590         screen = DefaultScreen(dpy);
 591         if(!parent)
 592                 parent = RootWindow(dpy, screen);
 593
 594         readstdin();
 595         running = grabkeyboard();
 596
 597         setup(topbar);
 598         drawmenu();
 599         XSync(dpy, False);
 600         run();
 601         cleanup();
 602         XCloseDisplay(dpy);
 603         return ret;
 604 }