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                 case XK_m:
 277                         ksym = XK_Return;
 278                         break;
 279                 case XK_n:
 280                         ksym = XK_Down;
 281                         break;
 282                 case XK_p:
 283                         ksym = XK_Up;
 284                         break;
 285                 case XK_u:
 286                         text[0] = '\0';
 287                         match(text);
 288                         break;
 289                 case XK_w:
 290                         if(len == 0)
 291                                 return;
 292                         i = len;
 293                         while(i-- > 0 && text[i] == ' ');
 294                         while(i-- > 0 && text[i] != ' ');
 295                         text[++i] = '\0';
 296                         match(text);
 297                         break;
 298                 case XK_x:
 299                         dinput();
 300                         break;
 301                 }
 302         }
 303         switch(ksym) {
 304         default:
 305                 num = MIN(num, sizeof text);
 306                 if(num && !iscntrl((int) buf[0])) {
 307                         memcpy(text + len, buf, num + 1);
 308                         len += num;
 309                         match(text);
 310                 }
 311                 break;
 312         case XK_BackSpace:
 313                 if(len == 0)
 314                         return;
 315                 for(i = 1; len - i > 0 && !IS_UTF8_1ST_CHAR(text[len - i]); i++);
 316                 len -= i;
 317                 text[len] = '\0';
 318                 match(text);
 319                 break;
 320         case XK_End:
 321                 while(next) {
 322                         sel = curr = next;
 323                         calcoffsets();
 324                 }
 325                 while(sel && sel->right)
 326                         sel = sel->right;
 327                 break;
 328         case XK_Escape:
 329                 ret = 1;
 330                 running = False;
 331                 return;
 332         case XK_Home:
 333                 sel = curr = item;
 334                 calcoffsets();
 335                 break;
 336         case XK_Left:
 337         case XK_Up:
 338                 if(!sel || !sel->left)
 339                         return;
 340                 sel = sel->left;
 341                 if(sel->right == curr) {
 342                         curr = prev;
 343                         calcoffsets();
 344                 }
 345                 break;
 346         case XK_Next:
 347                 if(!next)
 348                         return;
 349                 sel = curr = next;
 350                 calcoffsets();
 351                 break;
 352         case XK_Prior:
 353                 if(!prev)
 354                         return;
 355                 sel = curr = prev;
 356                 calcoffsets();
 357                 break;
 358         case XK_Return:
 359                 if((e->state & ShiftMask) || !sel)
 360                         fprintf(stdout, "%s", text);
 361                 else
 362                         fprintf(stdout, "%s", sel->text);
 363                 fflush(stdout);
 364                 running = False;
 365                 return;
 366         case XK_Right:
 367         case XK_Down:
 368                 if(!sel || !sel->right)
 369                         return;
 370                 sel = sel->right;
 371                 if(sel == next) {
 372                         curr = next;
 373                         calcoffsets();
 374                 }
 375                 break;
 376         case XK_Tab:
 377                 if(sel)
 378                         strncpy(text, sel->text, sizeof text);
 379                 dinput();
 380                 break;
 381         }
 382         drawmenu();
 383 }
 384
 385 void
 386 match(char *pattern) {
 387         unsigned int plen;
 388         Item *i, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
 389
 390         if(!pattern)
 391                 return;
 392         plen = strlen(pattern);
 393         item = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
 394         for(i = allitems; i; i = i->next)
 395                 if(!fstrncmp(pattern, i->text, plen + 1))
 396                         appenditem(i, &lexact, &exactend);
 397                 else if(!fstrncmp(pattern, i->text, plen))
 398                         appenditem(i, &lprefix, &prefixend);
 399                 else if(fstrstr(i->text, pattern))
 400                         appenditem(i, &lsubstr, &substrend);
 401         if(lexact) {
 402                 item = lexact;
 403                 itemend = exactend;
 404         }
 405         if(lprefix) {
 406                 if(itemend) {
 407                         itemend->right = lprefix;
 408                         lprefix->left = itemend;
 409                 }
 410                 else
 411                         item = lprefix;
 412                 itemend = prefixend;
 413         }
 414         if(lsubstr) {
 415                 if(itemend) {
 416                         itemend->right = lsubstr;
 417                         lsubstr->left = itemend;
 418                 }
 419                 else
 420                         item = lsubstr;
 421         }
 422         curr = prev = next = sel = item;
 423         calcoffsets();
 424 }
 425
 426 void
 427 readstdin(void) {
 428         char *p, buf[sizeof text];
 429         unsigned int len = 0, max = 0;
 430         Item *i, *new;
 431
 432         i = NULL;
 433         while(fgets(buf, sizeof buf, stdin)) {
 434                 len = strlen(buf);
 435                 if(buf[len-1] == '\n')
 436                         buf[--len] = '\0';
 437                 if(!(p = strdup(buf)))
 438                         eprint("cannot strdup %u bytes\n", len);
 439                 if((max = MAX(max, len)) == len)
 440                         maxname = p;
 441                 if(!(new = malloc(sizeof *new)))
 442                         eprint("cannot malloc %u bytes\n", sizeof *new);
 443                 new->next = new->left = new->right = NULL;
 444                 new->text = p;
 445                 if(!i)
 446                         allitems = new;
 447                 else
 448                         i->next = new;
 449                 i = new;
 450         }
 451 }
 452
 453 void
 454 run(void) {
 455         XEvent ev;
 456
 457         /* main event loop */
 458         while(running && !XNextEvent(dpy, &ev))
 459                 switch (ev.type) {
 460                 case KeyPress:
 461                         kpress(&ev.xkey);
 462                         break;
 463                 case Expose:
 464                         if(ev.xexpose.count == 0)
 465                                 drawmenu();
 466                         break;
 467                 case VisibilityNotify:
 468                         if (ev.xvisibility.state != VisibilityUnobscured)
 469                                 XRaiseWindow(dpy, win);
 470                         break;
 471                 }
 472 }
 473
 474 void
 475 setup(Bool topbar) {
 476         int i, j, x, y;
 477 #if XINERAMA
 478         int n;
 479         XineramaScreenInfo *info = NULL;
 480 #endif
 481         XModifierKeymap *modmap;
 482         XSetWindowAttributes wa;
 483         XWindowAttributes pwa;
 484
 485         /* init modifier map */
 486         modmap = XGetModifierMapping(dpy);
 487         for(i = 0; i < 8; i++)
 488                 for(j = 0; j < modmap->max_keypermod; j++) {
 489                         if(modmap->modifiermap[i * modmap->max_keypermod + j]
 490                         == XKeysymToKeycode(dpy, XK_Num_Lock))
 491                                 numlockmask = (1 << i);
 492                 }
 493         XFreeModifiermap(modmap);
 494
 495         dc.dpy = dpy;
 496         normcol[ColBG] = getcolor(&dc, normbgcolor);
 497         normcol[ColFG] = getcolor(&dc, normfgcolor);
 498         selcol[ColBG] = getcolor(&dc, selbgcolor);
 499         selcol[ColFG] = getcolor(&dc, selfgcolor);
 500         initfont(&dc, font);
 501
 502         /* menu window */
 503         wa.override_redirect = True;
 504         wa.background_pixmap = ParentRelative;
 505         wa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
 506
 507         /* menu window geometry */
 508         mh = (dc.font.height + 2) * (lines + 1);
 509 #if XINERAMA
 510         if(parent == RootWindow(dpy, screen) && XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
 511                 i = 0;
 512                 if(n > 1) {
 513                         int di;
 514                         unsigned int dui;
 515                         Window dummy;
 516                         if(XQueryPointer(dpy, parent, &dummy, &dummy, &x, &y, &di, &di, &dui))
 517                                 for(i = 0; i < n; i++)
 518                                         if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
 519                                                 break;
 520                 }
 521                 x = info[i].x_org;
 522                 y = topbar ? info[i].y_org : info[i].y_org + info[i].height - mh;
 523                 mw = info[i].width;
 524                 XFree(info);
 525         }
 526         else
 527 #endif
 528         {
 529                 XGetWindowAttributes(dpy, parent, &pwa);
 530                 x = 0;
 531                 y = topbar ? 0 : pwa.height - mh;
 532                 mw = pwa.width;
 533         }
 534
 535         win = XCreateWindow(dpy, parent, x, y, mw, mh, 0,
 536                         DefaultDepth(dpy, screen), CopyFromParent,
 537                         DefaultVisual(dpy, screen),
 538                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 539
 540         setupdraw(&dc, win);
 541         if(maxname)
 542                 cmdw = MIN(textw(&dc, maxname), mw / 3);
 543         if(prompt)
 544                 promptw = MIN(textw(&dc, prompt), mw / 5);
 545         text[0] = '\0';
 546         match(text);
 547         XMapRaised(dpy, win);
 548 }
 549
 550 int
 551 main(int argc, char *argv[]) {
 552         unsigned int i;
 553         Bool topbar = True;
 554
 555         /* command line args */
 556         progname = argv[0];
 557         for(i = 1; i < argc; i++)
 558                 if(!strcmp(argv[i], "-i")) {
 559                         fstrncmp = strncasecmp;
 560                         fstrstr = cistrstr;
 561                 }
 562                 else if(!strcmp(argv[i], "-b"))
 563                         topbar = False;
 564                 else if(!strcmp(argv[i], "-e")) {
 565                         if(++i < argc) parent = atoi(argv[i]);
 566                 }
 567                 else if(!strcmp(argv[i], "-l")) {
 568                         if(++i < argc) lines = atoi(argv[i]);
 569                         if(lines > 0)
 570                                 calcoffsets = calcoffsetsv;
 571                 }
 572                 else if(!strcmp(argv[i], "-fn")) {
 573                         if(++i < argc) font = argv[i];
 574                 }
 575                 else if(!strcmp(argv[i], "-nb")) {
 576                         if(++i < argc) normbgcolor = argv[i];
 577                 }
 578                 else if(!strcmp(argv[i], "-nf")) {
 579                         if(++i < argc) normfgcolor = argv[i];
 580                 }
 581                 else if(!strcmp(argv[i], "-p")) {
 582                         if(++i < argc) prompt = argv[i];
 583                 }
 584                 else if(!strcmp(argv[i], "-sb")) {
 585                         if(++i < argc) selbgcolor = argv[i];
 586                 }
 587                 else if(!strcmp(argv[i], "-sf")) {
 588                         if(++i < argc) selfgcolor = argv[i];
 589                 }
 590                 else if(!strcmp(argv[i], "-v"))
 591                         eprint("dmenu-"VERSION", © 2006-2010 dmenu engineers, see LICENSE for details\n");
 592                 else
 593                         eprint("usage: dmenu [-i] [-b] [-e <xid>] [-l <lines>] [-fn <font>] [-nb <color>]\n"
 594                                "             [-nf <color>] [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n");
 595         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 596                 fprintf(stderr, "dmenu: warning: no locale support\n");
 597         if(!(dpy = XOpenDisplay(NULL)))
 598                 eprint("cannot open display\n");
 599         screen = DefaultScreen(dpy);
 600         if(!parent)
 601                 parent = RootWindow(dpy, screen);
 602
 603         readstdin();
 604         running = grabkeyboard();
 605
 606         setup(topbar);
 607         drawmenu();
 608         XSync(dpy, False);
 609         run();
 610         cleanup();
 611         XCloseDisplay(dpy);
 612         return ret;
 613 }