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 dinput(void);
  38 static void drawmenu(void);
  39 static void drawmenuh(void);
  40 static void drawmenuv(void);
  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 #include "draw.h"
  50
  51 /* variables */
  52 static char *maxname = NULL;
  53 static char *prompt = NULL;
  54 static char text[4096];
  55 static int cmdw = 0;
  56 static int promptw = 0;
  57 static int ret = 0;
  58 static int screen;
  59 static unsigned int lines = 0;
  60 static unsigned int numlockmask = 0;
  61 static unsigned int mw, mh;
  62 static unsigned long normcol[ColLast];
  63 static unsigned long selcol[ColLast];
  64 static Bool running = True;
  65 static DC dc;
  66 static Display *dpy;
  67 static Item *allitems = NULL;  /* first of all items */
  68 static Item *item = NULL;      /* first of pattern matching items */
  69 static Item *sel = NULL;
  70 static Item *next = NULL;
  71 static Item *prev = NULL;
  72 static Item *curr = NULL;
  73 static Window win, parent;
  74 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
  75 static char *(*fstrstr)(const char *, const char *) = strstr;
  76 static void (*calcoffsets)(void) = calcoffsetsh;
  77
  78 void
  79 appenditem(Item *i, Item **list, Item **last) {
  80         if(!(*last))
  81                 *list = i;
  82         else
  83                 (*last)->right = i;
  84         i->left = *last;
  85         i->right = NULL;
  86         *last = i;
  87 }
  88
  89 void
  90 calcoffsetsh(void) {
  91         unsigned int w;
  92
  93         w = promptw + cmdw + (2 * spaceitem);
  94         for(next = curr; next; next = next->right)
  95                 if((w += MIN(textw(&dc, next->text), mw / 3)) > mw)
  96                         break;
  97         w = promptw + cmdw + (2 * spaceitem);
  98         for(prev = curr; prev && prev->left; prev = prev->left)
  99                 if((w += MIN(textw(&dc, prev->left->text), mw / 3)) > mw)
 100                         break;
 101 }
 102
 103 void
 104 calcoffsetsv(void) {
 105         unsigned int i;
 106
 107         next = prev = curr;
 108         for(i = 0; i < lines && next; i++)
 109                 next = next->right;
 110         for(i = 0; i < lines && prev && prev->left; i++)
 111                 prev = prev->left;
 112 }
 113
 114 char *
 115 cistrstr(const char *s, const char *sub) {
 116         int c, csub;
 117         unsigned int len;
 118
 119         if(!sub)
 120                 return (char *)s;
 121         if((c = tolower(*sub++)) != '\0') {
 122                 len = strlen(sub);
 123                 do {
 124                         do {
 125                                 if((csub = *s++) == '\0')
 126                                         return NULL;
 127                         }
 128                         while(tolower(csub) != c);
 129                 }
 130                 while(strncasecmp(s, sub, len) != 0);
 131                 s--;
 132         }
 133         return (char *)s;
 134 }
 135
 136 void
 137 cleanup(void) {
 138         Item *itm;
 139
 140         while(allitems) {
 141                 itm = allitems->next;
 142                 free(allitems->text);
 143                 free(allitems);
 144                 allitems = itm;
 145         }
 146         cleanupdraw(&dc);
 147         XDestroyWindow(dpy, win);
 148         XUngrabKeyboard(dpy, CurrentTime);
 149 }
 150
 151 void
 152 dinput(void) {
 153         cleanup();
 154         execlp("dinput", "dinput", text, NULL); /* todo: argv */
 155         eprint("cannot exec dinput\n");
 156 }
 157
 158 void
 159 drawmenu(void) {
 160         dc.x = 0;
 161         dc.y = 0;
 162         dc.w = mw;
 163         dc.h = mh;
 164         drawtext(&dc, NULL, normcol);
 165         /* print prompt? */
 166         if(prompt) {
 167                 dc.w = promptw;
 168                 drawtext(&dc, prompt, selcol);
 169                 dc.x += dc.w;
 170         }
 171         dc.w = mw - dc.x;
 172         /* print command */
 173         if(cmdw && item && lines == 0)
 174                 dc.w = cmdw;
 175         drawtext(&dc, *text ? text : NULL, normcol);
 176         if(curr) {
 177                 if(lines > 0)
 178                         drawmenuv();
 179                 else
 180                         drawmenuh();
 181         }
 182         XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
 183         XFlush(dpy);
 184 }
 185
 186 void
 187 drawmenuh(void) {
 188         Item *i;
 189
 190         dc.x += cmdw;
 191         dc.w = spaceitem;
 192         drawtext(&dc, curr->left ? "<" : NULL, normcol);
 193         dc.x += dc.w;
 194         for(i = curr; i != next; i=i->right) {
 195                 dc.w = MIN(textw(&dc, i->text), mw / 3);
 196                 drawtext(&dc, i->text, (sel == i) ? selcol : normcol);
 197                 dc.x += dc.w;
 198         }
 199         dc.w = spaceitem;
 200         dc.x = mw - dc.w;
 201         drawtext(&dc, next ? ">" : NULL, normcol);
 202 }
 203
 204 void
 205 drawmenuv(void) {
 206         Item *i;
 207
 208         dc.w = mw - dc.x;
 209         dc.h = dc.font.height + 2;
 210         dc.y = dc.h;
 211         for(i = curr; i != next; i=i->right) {
 212                 drawtext(&dc, i->text, (sel == i) ? selcol : normcol);
 213                 dc.y += dc.h;
 214         }
 215         dc.h = mh - dc.y;
 216         drawtext(&dc, NULL, normcol);
 217 }
 218
 219 Bool
 220 grabkeyboard(void) {
 221         unsigned int len;
 222
 223         for(len = 1000; len; len--) {
 224                 if(XGrabKeyboard(dpy, parent, True, GrabModeAsync, GrabModeAsync, CurrentTime)
 225                 == GrabSuccess)
 226                         break;
 227                 usleep(1000);
 228         }
 229         return len > 0;
 230 }
 231
 232 void
 233 kpress(XKeyEvent * e) {
 234         char buf[sizeof text];
 235         int num;
 236         unsigned int i, len;
 237         KeySym ksym;
 238
 239         len = strlen(text);
 240         num = XLookupString(e, buf, sizeof buf, &ksym, NULL);
 241         if(ksym == XK_KP_Enter)
 242                 ksym = XK_Return;
 243         else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
 244                 ksym = (ksym - XK_KP_0) + XK_0;
 245         else if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
 246         || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
 247         || IsPrivateKeypadKey(ksym))
 248                 return;
 249         /* first check if a control mask is omitted */
 250         if(e->state & ControlMask) {
 251                 switch(tolower(ksym)) {
 252                 default:
 253                         return;
 254                 case XK_a:
 255                         ksym = XK_Home;
 256                         break;
 257                 case XK_b:
 258                         ksym = XK_Left;
 259                         break;
 260                 case XK_c:
 261                         ksym = XK_Escape;
 262                         break;
 263                 case XK_e:
 264                         ksym = XK_End;
 265                         break;
 266                 case XK_f:
 267                         ksym = XK_Right;
 268                         break;
 269                 case XK_h:
 270                         ksym = XK_BackSpace;
 271                         break;
 272                 case XK_i:
 273                         ksym = XK_Tab;
 274                         break;
 275                 case XK_j:
 276                         ksym = XK_Return;
 277                         break;
 278                 case XK_n:
 279                         ksym = XK_Down;
 280                         break;
 281                 case XK_p:
 282                         ksym = XK_Up;
 283                         break;
 284                 case XK_u:
 285                         text[0] = '\0';
 286                         match(text);
 287                         break;
 288                 case XK_w:
 289                         if(len == 0)
 290                                 return;
 291                         i = len;
 292                         while(i-- > 0 && text[i] == ' ');
 293                         while(i-- > 0 && text[i] != ' ');
 294                         text[++i] = '\0';
 295                         match(text);
 296                         break;
 297                 case XK_x:
 298                         dinput();
 299                         break;
 300                 }
 301         }
 302         switch(ksym) {
 303         default:
 304                 num = MIN(num, sizeof text);
 305                 if(num && !iscntrl((int) buf[0])) {
 306                         memcpy(text + len, buf, num + 1);
 307                         len += num;
 308                         match(text);
 309                 }
 310                 break;
 311         case XK_BackSpace:
 312                 if(len == 0)
 313                         return;
 314                 for(i = 1; len - i > 0 && !IS_UTF8_1ST_CHAR(text[len - i]); i++);
 315                 len -= i;
 316                 text[len] = '\0';
 317                 match(text);
 318                 break;
 319         case XK_End:
 320                 while(next) {
 321                         sel = curr = next;
 322                         calcoffsets();
 323                 }
 324                 while(sel && sel->right)
 325                         sel = sel->right;
 326                 break;
 327         case XK_Escape:
 328                 ret = 1;
 329                 running = False;
 330                 return;
 331         case XK_Home:
 332                 sel = curr = item;
 333                 calcoffsets();
 334                 break;
 335         case XK_Left:
 336         case XK_Up:
 337                 if(!sel || !sel->left)
 338                         return;
 339                 sel = sel->left;
 340                 if(sel->right == curr) {
 341                         curr = prev;
 342                         calcoffsets();
 343                 }
 344                 break;
 345         case XK_Next:
 346                 if(!next)
 347                         return;
 348                 sel = curr = next;
 349                 calcoffsets();
 350                 break;
 351         case XK_Prior:
 352                 if(!prev)
 353                         return;
 354                 sel = curr = prev;
 355                 calcoffsets();
 356                 break;
 357         case XK_Return:
 358                 if((e->state & ShiftMask) || !sel)
 359                         fprintf(stdout, "%s", text);
 360                 else
 361                         fprintf(stdout, "%s", sel->text);
 362                 fflush(stdout);
 363                 running = False;
 364                 return;
 365         case XK_Right:
 366         case XK_Down:
 367                 if(!sel || !sel->right)
 368                         return;
 369                 sel = sel->right;
 370                 if(sel == next) {
 371                         curr = next;
 372                         calcoffsets();
 373                 }
 374                 break;
 375         case XK_Tab:
 376                 if(sel)
 377                         strncpy(text, sel->text, sizeof text);
 378                 dinput();
 379                 break;
 380         }
 381         drawmenu();
 382 }
 383
 384 void
 385 match(char *pattern) {
 386         unsigned int plen;
 387         Item *i, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
 388
 389         if(!pattern)
 390                 return;
 391         plen = strlen(pattern);
 392         item = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
 393         for(i = allitems; i; i = i->next)
 394                 if(!fstrncmp(pattern, i->text, plen + 1))
 395                         appenditem(i, &lexact, &exactend);
 396                 else if(!fstrncmp(pattern, i->text, plen))
 397                         appenditem(i, &lprefix, &prefixend);
 398                 else if(fstrstr(i->text, pattern))
 399                         appenditem(i, &lsubstr, &substrend);
 400         if(lexact) {
 401                 item = lexact;
 402                 itemend = exactend;
 403         }
 404         if(lprefix) {
 405                 if(itemend) {
 406                         itemend->right = lprefix;
 407                         lprefix->left = itemend;
 408                 }
 409                 else
 410                         item = lprefix;
 411                 itemend = prefixend;
 412         }
 413         if(lsubstr) {
 414                 if(itemend) {
 415                         itemend->right = lsubstr;
 416                         lsubstr->left = itemend;
 417                 }
 418                 else
 419                         item = lsubstr;
 420         }
 421         curr = prev = next = sel = item;
 422         calcoffsets();
 423 }
 424
 425 void
 426 readstdin(void) {
 427         char *p, buf[sizeof text];
 428         unsigned int len = 0, max = 0;
 429         Item *i, *new;
 430
 431         i = NULL;
 432         while(fgets(buf, sizeof buf, stdin)) {
 433                 len = strlen(buf);
 434                 if(buf[len-1] == '\n')
 435                         buf[--len] = '\0';
 436                 if(!(p = strdup(buf)))
 437                         eprint("cannot strdup %u bytes\n", len);
 438                 if((max = MAX(max, len)) == len)
 439                         maxname = p;
 440                 if(!(new = malloc(sizeof *new)))
 441                         eprint("cannot malloc %u bytes\n", sizeof *new);
 442                 new->next = new->left = new->right = NULL;
 443                 new->text = p;
 444                 if(!i)
 445                         allitems = new;
 446                 else
 447                         i->next = new;
 448                 i = new;
 449         }
 450 }
 451
 452 void
 453 run(void) {
 454         XEvent ev;
 455
 456         /* main event loop */
 457         while(running && !XNextEvent(dpy, &ev))
 458                 switch (ev.type) {
 459                 case KeyPress:
 460                         kpress(&ev.xkey);
 461                         break;
 462                 case Expose:
 463                         if(ev.xexpose.count == 0)
 464                                 drawmenu();
 465                         break;
 466                 case VisibilityNotify:
 467                         if (ev.xvisibility.state != VisibilityUnobscured)
 468                                 XRaiseWindow(dpy, win);
 469                         break;
 470                 }
 471 }
 472
 473 void
 474 setup(Bool topbar) {
 475         int i, j, x, y;
 476 #if XINERAMA
 477         int n;
 478         XineramaScreenInfo *info = NULL;
 479 #endif
 480         XModifierKeymap *modmap;
 481         XSetWindowAttributes wa;
 482         XWindowAttributes pwa;
 483
 484         /* init modifier map */
 485         modmap = XGetModifierMapping(dpy);
 486         for(i = 0; i < 8; i++)
 487                 for(j = 0; j < modmap->max_keypermod; j++) {
 488                         if(modmap->modifiermap[i * modmap->max_keypermod + j]
 489                         == XKeysymToKeycode(dpy, XK_Num_Lock))
 490                                 numlockmask = (1 << i);
 491                 }
 492         XFreeModifiermap(modmap);
 493
 494         dc.dpy = dpy;
 495         normcol[ColBG] = getcolor(&dc, normbgcolor);
 496         normcol[ColFG] = getcolor(&dc, normfgcolor);
 497         selcol[ColBG] = getcolor(&dc, selbgcolor);
 498         selcol[ColFG] = getcolor(&dc, selfgcolor);
 499         initfont(&dc, font);
 500
 501         /* menu window */
 502         wa.override_redirect = True;
 503         wa.background_pixmap = ParentRelative;
 504         wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask | VisibilityChangeMask;
 505
 506         /* menu window geometry */
 507         mh = (dc.font.height + 2) * (lines + 1);
 508 #if XINERAMA
 509         if(parent == RootWindow(dpy, screen) && XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
 510                 i = 0;
 511                 if(n > 1) {
 512                         int di;
 513                         unsigned int dui;
 514                         Window dummy;
 515                         if(XQueryPointer(dpy, parent, &dummy, &dummy, &x, &y, &di, &di, &dui))
 516                                 for(i = 0; i < n; i++)
 517                                         if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
 518                                                 break;
 519                 }
 520                 x = info[i].x_org;
 521                 y = topbar ? info[i].y_org : info[i].y_org + info[i].height - mh;
 522                 mw = info[i].width;
 523                 XFree(info);
 524         }
 525         else
 526 #endif
 527         {
 528                 XGetWindowAttributes(dpy, parent, &pwa);
 529                 x = 0;
 530                 y = topbar ? 0 : pwa.height - mh;
 531                 mw = pwa.width;
 532         }
 533
 534         win = XCreateWindow(dpy, parent, x, y, mw, mh, 0,
 535                         DefaultDepth(dpy, screen), CopyFromParent,
 536                         DefaultVisual(dpy, screen),
 537                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 538
 539         setupdraw(&dc, win);
 540         if(maxname)
 541                 cmdw = MIN(textw(&dc, maxname), mw / 3);
 542         if(prompt)
 543                 promptw = MIN(textw(&dc, prompt), mw / 5);
 544         text[0] = '\0';
 545         match(text);
 546         XMapRaised(dpy, win);
 547 }
 548
 549 int
 550 main(int argc, char *argv[]) {
 551         unsigned int i;
 552         Bool topbar = True;
 553
 554         /* command line args */
 555         progname = argv[0];
 556         for(i = 1; i < argc; i++)
 557                 if(!strcmp(argv[i], "-i")) {
 558                         fstrncmp = strncasecmp;
 559                         fstrstr = cistrstr;
 560                 }
 561                 else if(!strcmp(argv[i], "-b"))
 562                         topbar = False;
 563                 else if(!strcmp(argv[i], "-e")) {
 564                         if(++i < argc) parent = atoi(argv[i]);
 565                 }
 566                 else if(!strcmp(argv[i], "-l")) {
 567                         if(++i < argc) lines = atoi(argv[i]);
 568                         if(lines > 0)
 569                                 calcoffsets = calcoffsetsv;
 570                 }
 571                 else if(!strcmp(argv[i], "-fn")) {
 572                         if(++i < argc) font = argv[i];
 573                 }
 574                 else if(!strcmp(argv[i], "-nb")) {
 575                         if(++i < argc) normbgcolor = argv[i];
 576                 }
 577                 else if(!strcmp(argv[i], "-nf")) {
 578                         if(++i < argc) normfgcolor = argv[i];
 579                 }
 580                 else if(!strcmp(argv[i], "-p")) {
 581                         if(++i < argc) prompt = argv[i];
 582                 }
 583                 else if(!strcmp(argv[i], "-sb")) {
 584                         if(++i < argc) selbgcolor = argv[i];
 585                 }
 586                 else if(!strcmp(argv[i], "-sf")) {
 587                         if(++i < argc) selfgcolor = argv[i];
 588                 }
 589                 else if(!strcmp(argv[i], "-v"))
 590                         eprint("dmenu-"VERSION", © 2006-2010 dmenu engineers, see LICENSE for details\n");
 591                 else
 592                         eprint("usage: dmenu [-i] [-b] [-e <xid>] [-l <lines>] [-fn <font>] [-nb <color>]\n"
 593                                "             [-nf <color>] [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n");
 594         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 595                 fprintf(stderr, "dmenu: warning: no locale support\n");
 596         if(!(dpy = XOpenDisplay(NULL)))
 597                 eprint("cannot open display\n");
 598         screen = DefaultScreen(dpy);
 599         if(!parent)
 600                 parent = RootWindow(dpy, screen);
 601
 602         readstdin();
 603         running = grabkeyboard();
 604
 605         setup(topbar);
 606         drawmenu();
 607         XSync(dpy, False);
 608         run();
 609         cleanup();
 610         XCloseDisplay(dpy);
 611         return ret;
 612 }