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 Bool running = True;
  63 static DC dc;
  64 static Display *dpy;
  65 static Item *allitems = NULL;  /* first of all items */
  66 static Item *item = NULL;      /* first of pattern matching items */
  67 static Item *sel = NULL;
  68 static Item *next = NULL;
  69 static Item *prev = NULL;
  70 static Item *curr = NULL;
  71 static Window win, parent;
  72 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
  73 static char *(*fstrstr)(const char *, const char *) = strstr;
  74 static void (*calcoffsets)(void) = calcoffsetsh;
  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         w = promptw + cmdw + (2 * spaceitem);
  92         for(next = curr; next; next = next->right)
  93                 if((w += MIN(textw(&dc, next->text), mw / 3)) > mw)
  94                         break;
  95         w = promptw + cmdw + (2 * spaceitem);
  96         for(prev = curr; prev && prev->left; prev = prev->left)
  97                 if((w += MIN(textw(&dc, prev->left->text), mw / 3)) > mw)
  98                         break;
  99 }
 100
 101 void
 102 calcoffsetsv(void) {
 103         unsigned int i;
 104
 105         next = prev = curr;
 106         for(i = 0; i < lines && next; i++)
 107                 next = next->right;
 108         for(i = 0; i < lines && prev && prev->left; i++)
 109                 prev = prev->left;
 110 }
 111
 112 char *
 113 cistrstr(const char *s, const char *sub) {
 114         int c, csub;
 115         unsigned int len;
 116
 117         if(!sub)
 118                 return (char *)s;
 119         if((c = tolower(*sub++)) != '\0') {
 120                 len = strlen(sub);
 121                 do {
 122                         do {
 123                                 if((csub = *s++) == '\0')
 124                                         return NULL;
 125                         }
 126                         while(tolower(csub) != c);
 127                 }
 128                 while(strncasecmp(s, sub, len) != 0);
 129                 s--;
 130         }
 131         return (char *)s;
 132 }
 133
 134 void
 135 cleanup(void) {
 136         Item *itm;
 137
 138         while(allitems) {
 139                 itm = allitems->next;
 140                 free(allitems->text);
 141                 free(allitems);
 142                 allitems = itm;
 143         }
 144         cleanupdraw(&dc);
 145         XDestroyWindow(dpy, win);
 146         XUngrabKeyboard(dpy, CurrentTime);
 147 }
 148
 149 void
 150 dinput(void) {
 151         cleanup();
 152         execlp("dinput", "dinput", text, NULL); /* todo: argv */
 153         eprint("cannot exec dinput\n");
 154 }
 155
 156 void
 157 drawmenu(void) {
 158         dc.x = 0;
 159         dc.y = 0;
 160         dc.w = mw;
 161         dc.h = mh;
 162         drawtext(&dc, NULL, dc.norm);
 163         /* print prompt? */
 164         if(prompt) {
 165                 dc.w = promptw;
 166                 drawtext(&dc, prompt, dc.sel);
 167                 dc.x += dc.w;
 168         }
 169         dc.w = mw - dc.x;
 170         /* print command */
 171         if(cmdw && item && lines == 0)
 172                 dc.w = cmdw;
 173         drawtext(&dc, *text ? text : NULL, dc.norm);
 174         if(curr) {
 175                 if(lines > 0)
 176                         drawmenuv();
 177                 else
 178                         drawmenuh();
 179         }
 180         XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
 181         XFlush(dpy);
 182 }
 183
 184 void
 185 drawmenuh(void) {
 186         Item *i;
 187
 188         dc.x += cmdw;
 189         dc.w = spaceitem;
 190         drawtext(&dc, curr->left ? "<" : NULL, dc.norm);
 191         dc.x += dc.w;
 192         for(i = curr; i != next; i=i->right) {
 193                 dc.w = MIN(textw(&dc, i->text), mw / 3);
 194                 drawtext(&dc, i->text, (sel == i) ? dc.sel : dc.norm);
 195                 dc.x += dc.w;
 196         }
 197         dc.w = spaceitem;
 198         dc.x = mw - dc.w;
 199         drawtext(&dc, next ? ">" : NULL, dc.norm);
 200 }
 201
 202 void
 203 drawmenuv(void) {
 204         Item *i;
 205
 206         dc.w = mw - dc.x;
 207         dc.h = dc.font.height + 2;
 208         dc.y = dc.h;
 209         for(i = curr; i != next; i=i->right) {
 210                 drawtext(&dc, i->text, (sel == i) ? dc.sel : dc.norm);
 211                 dc.y += dc.h;
 212         }
 213         dc.h = mh - dc.y;
 214         drawtext(&dc, NULL, dc.norm);
 215 }
 216
 217 Bool
 218 grabkeyboard(void) {
 219         unsigned int len;
 220
 221         for(len = 1000; len; len--) {
 222                 if(XGrabKeyboard(dpy, parent, True, GrabModeAsync, GrabModeAsync, CurrentTime)
 223                 == GrabSuccess)
 224                         break;
 225                 usleep(1000);
 226         }
 227         return len > 0;
 228 }
 229
 230 void
 231 kpress(XKeyEvent * e) {
 232         char buf[sizeof text];
 233         int num;
 234         unsigned int i, len;
 235         KeySym ksym;
 236
 237         len = strlen(text);
 238         num = XLookupString(e, buf, sizeof buf, &ksym, NULL);
 239         if(ksym == XK_KP_Enter)
 240                 ksym = XK_Return;
 241         else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
 242                 ksym = (ksym - XK_KP_0) + XK_0;
 243         else if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
 244         || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
 245         || IsPrivateKeypadKey(ksym))
 246                 return;
 247         /* first check if a control mask is omitted */
 248         if(e->state & ControlMask) {
 249                 switch(tolower(ksym)) {
 250                 default:
 251                         return;
 252                 case XK_a:
 253                         ksym = XK_Home;
 254                         break;
 255                 case XK_b:
 256                         ksym = XK_Left;
 257                         break;
 258                 case XK_c:
 259                         ksym = XK_Escape;
 260                         break;
 261                 case XK_e:
 262                         ksym = XK_End;
 263                         break;
 264                 case XK_f:
 265                         ksym = XK_Right;
 266                         break;
 267                 case XK_h:
 268                         ksym = XK_BackSpace;
 269                         break;
 270                 case XK_i:
 271                         ksym = XK_Tab;
 272                         break;
 273                 case XK_j:
 274                         ksym = XK_Return;
 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:
 283                         text[0] = '\0';
 284                         match(text);
 285                         break;
 286                 case XK_w:
 287                         if(len == 0)
 288                                 return;
 289                         i = len;
 290                         while(i-- > 0 && text[i] == ' ');
 291                         while(i-- > 0 && text[i] != ' ');
 292                         text[++i] = '\0';
 293                         match(text);
 294                         break;
 295                 case XK_x:
 296                         dinput();
 297                         break;
 298                 }
 299         }
 300         switch(ksym) {
 301         default:
 302                 num = MIN(num, sizeof text);
 303                 if(num && !iscntrl((int) buf[0])) {
 304                         memcpy(text + len, buf, num + 1);
 305                         len += num;
 306                         match(text);
 307                 }
 308                 break;
 309         case XK_BackSpace:
 310                 if(len == 0)
 311                         return;
 312                 for(i = 1; len - i > 0 && !IS_UTF8_1ST_CHAR(text[len - i]); i++);
 313                 len -= i;
 314                 text[len] = '\0';
 315                 match(text);
 316                 break;
 317         case XK_End:
 318                 while(next) {
 319                         sel = curr = next;
 320                         calcoffsets();
 321                 }
 322                 while(sel && sel->right)
 323                         sel = sel->right;
 324                 break;
 325         case XK_Escape:
 326                 ret = 1;
 327                 running = False;
 328                 return;
 329         case XK_Home:
 330                 sel = curr = item;
 331                 calcoffsets();
 332                 break;
 333         case XK_Left:
 334         case XK_Up:
 335                 if(!sel || !sel->left)
 336                         return;
 337                 sel = sel->left;
 338                 if(sel->right == curr) {
 339                         curr = prev;
 340                         calcoffsets();
 341                 }
 342                 break;
 343         case XK_Next:
 344                 if(!next)
 345                         return;
 346                 sel = curr = next;
 347                 calcoffsets();
 348                 break;
 349         case XK_Prior:
 350                 if(!prev)
 351                         return;
 352                 sel = curr = prev;
 353                 calcoffsets();
 354                 break;
 355         case XK_Return:
 356                 if((e->state & ShiftMask) || !sel)
 357                         fprintf(stdout, "%s", text);
 358                 else
 359                         fprintf(stdout, "%s", sel->text);
 360                 fflush(stdout);
 361                 running = False;
 362                 return;
 363         case XK_Right:
 364         case XK_Down:
 365                 if(!sel || !sel->right)
 366                         return;
 367                 sel = sel->right;
 368                 if(sel == next) {
 369                         curr = next;
 370                         calcoffsets();
 371                 }
 372                 break;
 373         case XK_Tab:
 374                 if(sel)
 375                         strncpy(text, sel->text, sizeof text);
 376                 dinput();
 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("cannot strdup %u bytes\n", len);
 436                 if((max = MAX(max, len)) == len)
 437                         maxname = p;
 438                 if(!(new = malloc(sizeof *new)))
 439                         eprint("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         dc.dpy = dpy;
 493         dc.norm[ColBG] = getcolor(&dc, normbgcolor);
 494         dc.norm[ColFG] = getcolor(&dc, normfgcolor);
 495         dc.sel[ColBG] = getcolor(&dc, selbgcolor);
 496         dc.sel[ColFG] = getcolor(&dc, selfgcolor);
 497         initfont(&dc, font);
 498
 499         /* menu window */
 500         wa.override_redirect = True;
 501         wa.background_pixmap = ParentRelative;
 502         wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask | VisibilityChangeMask;
 503
 504         /* menu window geometry */
 505         mh = (dc.font.height + 2) * (lines + 1);
 506 #if XINERAMA
 507         if(parent == RootWindow(dpy, screen) && XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
 508                 i = 0;
 509                 if(n > 1) {
 510                         int di;
 511                         unsigned int dui;
 512                         Window dummy;
 513                         if(XQueryPointer(dpy, parent, &dummy, &dummy, &x, &y, &di, &di, &dui))
 514                                 for(i = 0; i < n; i++)
 515                                         if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
 516                                                 break;
 517                 }
 518                 x = info[i].x_org;
 519                 y = topbar ? info[i].y_org : info[i].y_org + info[i].height - mh;
 520                 mw = info[i].width;
 521                 XFree(info);
 522         }
 523         else
 524 #endif
 525         {
 526                 XGetWindowAttributes(dpy, parent, &pwa);
 527                 x = 0;
 528                 y = topbar ? 0 : pwa.height - mh;
 529                 mw = pwa.width;
 530         }
 531
 532         win = XCreateWindow(dpy, parent, x, y, mw, mh, 0,
 533                         DefaultDepth(dpy, screen), CopyFromParent,
 534                         DefaultVisual(dpy, screen),
 535                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 536
 537         setupdraw(&dc, win);
 538         if(maxname)
 539                 cmdw = MIN(textw(&dc, maxname), mw / 3);
 540         if(prompt)
 541                 promptw = MIN(textw(&dc, prompt), mw / 5);
 542         text[0] = '\0';
 543         match(text);
 544         XMapRaised(dpy, win);
 545 }
 546
 547 int
 548 main(int argc, char *argv[]) {
 549         unsigned int i;
 550         Bool topbar = True;
 551
 552         /* command line args */
 553         progname = argv[0];
 554         for(i = 1; i < argc; i++)
 555                 if(!strcmp(argv[i], "-i")) {
 556                         fstrncmp = strncasecmp;
 557                         fstrstr = cistrstr;
 558                 }
 559                 else if(!strcmp(argv[i], "-b"))
 560                         topbar = False;
 561                 else if(!strcmp(argv[i], "-e")) {
 562                         if(++i < argc) parent = atoi(argv[i]);
 563                 }
 564                 else if(!strcmp(argv[i], "-l")) {
 565                         if(++i < argc) lines = atoi(argv[i]);
 566                         if(lines > 0)
 567                                 calcoffsets = calcoffsetsv;
 568                 }
 569                 else if(!strcmp(argv[i], "-fn")) {
 570                         if(++i < argc) font = argv[i];
 571                 }
 572                 else if(!strcmp(argv[i], "-nb")) {
 573                         if(++i < argc) normbgcolor = argv[i];
 574                 }
 575                 else if(!strcmp(argv[i], "-nf")) {
 576                         if(++i < argc) normfgcolor = argv[i];
 577                 }
 578                 else if(!strcmp(argv[i], "-p")) {
 579                         if(++i < argc) prompt = argv[i];
 580                 }
 581                 else if(!strcmp(argv[i], "-sb")) {
 582                         if(++i < argc) selbgcolor = argv[i];
 583                 }
 584                 else if(!strcmp(argv[i], "-sf")) {
 585                         if(++i < argc) selfgcolor = argv[i];
 586                 }
 587                 else if(!strcmp(argv[i], "-v"))
 588                         eprint("dmenu-"VERSION", © 2006-2010 dmenu engineers, see LICENSE for details\n");
 589                 else
 590                         eprint("usage: dmenu [-i] [-b] [-e <xid>] [-l <lines>] [-fn <font>] [-nb <color>]\n"
 591                                "             [-nf <color>] [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n");
 592         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 593                 fprintf(stderr, "dmenu: warning: no locale support\n");
 594         if(!(dpy = XOpenDisplay(NULL)))
 595                 eprint("cannot open display\n");
 596         screen = DefaultScreen(dpy);
 597         if(!parent)
 598                 parent = RootWindow(dpy, screen);
 599
 600         readstdin();
 601         running = grabkeyboard();
 602
 603         setup(topbar);
 604         drawmenu();
 605         XSync(dpy, False);
 606         run();
 607         cleanup();
 608         XCloseDisplay(dpy);
 609         return ret;
 610 }