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 <stdlib.h>
   6 #include <stdio.h>
   7 #include <string.h>
   8 #include <unistd.h>
   9 #include <X11/Xlib.h>
  10 #include <X11/Xutil.h>
  11 #include <X11/keysym.h>
  12
  13 /* macros */
  14 #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
  15
  16 /* enums */
  17 enum { ColFG, ColBG, ColLast };
  18
  19 /* typedefs */
  20 typedef struct {
  21         int x, y, w, h;
  22         unsigned long norm[ColLast];
  23         unsigned long sel[ColLast];
  24         Drawable drawable;
  25         GC gc;
  26         struct {
  27                 XFontStruct *xfont;
  28                 XFontSet set;
  29                 int ascent;
  30                 int descent;
  31                 int height;
  32         } font;
  33 } DC; /* draw context */
  34
  35 typedef struct Item Item;
  36 struct Item {
  37         Item *next;             /* traverses all items */
  38         Item *left, *right;     /* traverses items matching current search pattern */
  39         char *text;
  40         Bool matched;
  41 };
  42
  43 /* forward declarations */
  44 Item *appenditem(Item *i, Item *last);
  45 void calcoffsets(void);
  46 void cleanup(void);
  47 void drawmenu(void);
  48 void drawtext(const char *text, unsigned long col[ColLast]);
  49 void *emalloc(unsigned int size);
  50 void eprint(const char *errstr, ...);
  51 char *estrdup(const char *str);
  52 unsigned long getcolor(const char *colstr);
  53 Bool grabkeyboard(void);
  54 void initfont(const char *fontstr);
  55 void kpress(XKeyEvent * e);
  56 void match(char *pattern);
  57 void readstdin(void);
  58 void run(void);
  59 void setup(Bool bottom);
  60 int strcaseido(const char *text, const char *pattern);
  61 char *cistrstr(const char *s, const char *sub);
  62 unsigned int textnw(const char *text, unsigned int len);
  63 unsigned int textw(const char *text);
  64
  65 #include "config.h"
  66
  67 /* variables */
  68 char *font = FONT;
  69 char *maxname = NULL;
  70 char *normbg = NORMBGCOLOR;
  71 char *normfg = NORMFGCOLOR;
  72 char *prompt = NULL;
  73 char *selbg = SELBGCOLOR;
  74 char *selfg = SELFGCOLOR;
  75 char text[4096];
  76 int screen;
  77 int ret = 0;
  78 unsigned int cmdw = 0;
  79 unsigned int mw, mh;
  80 unsigned int promptw = 0;
  81 unsigned int nitem = 0;
  82 unsigned int numlockmask = 0;
  83 Bool idomatch = False;
  84 Bool running = True;
  85 Display *dpy;
  86 DC dc = {0};
  87 Item *allitems = NULL;  /* first of all items */
  88 Item *item = NULL;      /* first of pattern matching items */
  89 Item *sel = NULL;
  90 Item *next = NULL;
  91 Item *prev = NULL;
  92 Item *curr = NULL;
  93 Window root, win;
  94
  95 Item *
  96 appenditem(Item *i, Item *last) {
  97         if(!last)
  98                 item = i;
  99         else
 100                 last->right = i;
 101         i->matched = True;
 102         i->left = last;
 103         i->right = NULL;
 104         last = i;
 105         nitem++;
 106         return last;
 107 }
 108
 109 void
 110 calcoffsets(void) {
 111         unsigned int tw, w;
 112
 113         if(!curr)
 114                 return;
 115         w = promptw + cmdw + 2 * SPACE;
 116         for(next = curr; next; next=next->right) {
 117                 tw = textw(next->text);
 118                 if(tw > mw / 3)
 119                         tw = mw / 3;
 120                 w += tw;
 121                 if(w > mw)
 122                         break;
 123         }
 124         w = promptw + cmdw + 2 * SPACE;
 125         for(prev = curr; prev && prev->left; prev=prev->left) {
 126                 tw = textw(prev->left->text);
 127                 if(tw > mw / 3)
 128                         tw = mw / 3;
 129                 w += tw;
 130                 if(w > mw)
 131                         break;
 132         }
 133 }
 134
 135 void
 136 cleanup(void) {
 137         Item *itm;
 138
 139         while(allitems) {
 140                 itm = allitems->next;
 141                 free(allitems->text);
 142                 free(allitems);
 143                 allitems = itm;
 144         }
 145         if(dc.font.set)
 146                 XFreeFontSet(dpy, dc.font.set);
 147         else
 148                 XFreeFont(dpy, dc.font.xfont);
 149         XFreePixmap(dpy, dc.drawable);
 150         XFreeGC(dpy, dc.gc);
 151         XDestroyWindow(dpy, win);
 152         XUngrabKeyboard(dpy, CurrentTime);
 153 }
 154
 155 void
 156 drawmenu(void) {
 157         Item *i;
 158
 159         dc.x = 0;
 160         dc.y = 0;
 161         dc.w = mw;
 162         dc.h = mh;
 163         drawtext(NULL, dc.norm);
 164         /* print prompt? */
 165         if(promptw) {
 166                 dc.w = promptw;
 167                 drawtext(prompt, dc.sel);
 168         }
 169         dc.x += promptw;
 170         dc.w = mw - promptw;
 171         /* print command */
 172         if(cmdw && item)
 173                 dc.w = cmdw;
 174         drawtext(text[0] ? text : NULL, dc.norm);
 175         dc.x += cmdw;
 176         if(curr) {
 177                 dc.w = SPACE;
 178                 drawtext((curr && curr->left) ? "<" : NULL, dc.norm);
 179                 dc.x += dc.w;
 180                 /* determine maximum items */
 181                 for(i = curr; i != next; i=i->right) {
 182                         dc.w = textw(i->text);
 183                         if(dc.w > mw / 3)
 184                                 dc.w = mw / 3;
 185                         drawtext(i->text, (sel == i) ? dc.sel : dc.norm);
 186                         dc.x += dc.w;
 187                 }
 188                 dc.x = mw - SPACE;
 189                 dc.w = SPACE;
 190                 drawtext(next ? ">" : NULL, dc.norm);
 191         }
 192         XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
 193         XFlush(dpy);
 194 }
 195
 196 void
 197 drawtext(const char *text, unsigned long col[ColLast]) {
 198         int x, y, w, h;
 199         static char buf[256];
 200         unsigned int len, olen;
 201         XRectangle r = { dc.x, dc.y, dc.w, dc.h };
 202
 203         XSetForeground(dpy, dc.gc, col[ColBG]);
 204         XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
 205         if(!text)
 206                 return;
 207         w = 0;
 208         olen = len = strlen(text);
 209         if(len >= sizeof buf)
 210                 len = sizeof buf - 1;
 211         memcpy(buf, text, len);
 212         buf[len] = 0;
 213         h = dc.font.ascent + dc.font.descent;
 214         y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
 215         x = dc.x + (h / 2);
 216         /* shorten text if necessary */
 217         while(len && (w = textnw(buf, len)) > dc.w - h)
 218                 buf[--len] = 0;
 219         if(len < olen) {
 220                 if(len > 1)
 221                         buf[len - 1] = '.';
 222                 if(len > 2)
 223                         buf[len - 2] = '.';
 224                 if(len > 3)
 225                         buf[len - 3] = '.';
 226         }
 227         if(w > dc.w)
 228                 return; /* too long */
 229         XSetForeground(dpy, dc.gc, col[ColFG]);
 230         if(dc.font.set)
 231                 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
 232         else
 233                 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
 234 }
 235
 236 void *
 237 emalloc(unsigned int size) {
 238         void *res = malloc(size);
 239
 240         if(!res)
 241                 eprint("fatal: could not malloc() %u bytes\n", size);
 242         return res;
 243 }
 244
 245 void
 246 eprint(const char *errstr, ...) {
 247         va_list ap;
 248
 249         va_start(ap, errstr);
 250         vfprintf(stderr, errstr, ap);
 251         va_end(ap);
 252         exit(EXIT_FAILURE);
 253 }
 254
 255 char *
 256 estrdup(const char *str) {
 257         void *res = strdup(str);
 258
 259         if(!res)
 260                 eprint("fatal: could not malloc() %u bytes\n", strlen(str));
 261         return res;
 262 }
 263
 264 unsigned long
 265 getcolor(const char *colstr) {
 266         Colormap cmap = DefaultColormap(dpy, screen);
 267         XColor color;
 268
 269         if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
 270                 eprint("error, cannot allocate color '%s'\n", colstr);
 271         return color.pixel;
 272 }
 273
 274 Bool
 275 grabkeyboard(void) {
 276         unsigned int len;
 277
 278         for(len = 1000; len; len--) {
 279                 if(XGrabKeyboard(dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime)
 280                         == GrabSuccess)
 281                         break;
 282                 usleep(1000);
 283         }
 284         return len > 0;
 285 }
 286
 287 void
 288 initfont(const char *fontstr) {
 289         char *def, **missing;
 290         int i, n;
 291
 292         if(!fontstr || fontstr[0] == '\0')
 293                 eprint("error, cannot load font: '%s'\n", fontstr);
 294         missing = NULL;
 295         if(dc.font.set)
 296                 XFreeFontSet(dpy, dc.font.set);
 297         dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
 298         if(missing)
 299                 XFreeStringList(missing);
 300         if(dc.font.set) {
 301                 XFontSetExtents *font_extents;
 302                 XFontStruct **xfonts;
 303                 char **font_names;
 304                 dc.font.ascent = dc.font.descent = 0;
 305                 font_extents = XExtentsOfFontSet(dc.font.set);
 306                 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
 307                 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
 308                         if(dc.font.ascent < (*xfonts)->ascent)
 309                                 dc.font.ascent = (*xfonts)->ascent;
 310                         if(dc.font.descent < (*xfonts)->descent)
 311                                 dc.font.descent = (*xfonts)->descent;
 312                         xfonts++;
 313                 }
 314         }
 315         else {
 316                 if(dc.font.xfont)
 317                         XFreeFont(dpy, dc.font.xfont);
 318                 dc.font.xfont = NULL;
 319                 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
 320                 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
 321                         eprint("error, cannot load font: '%s'\n", fontstr);
 322                 dc.font.ascent = dc.font.xfont->ascent;
 323                 dc.font.descent = dc.font.xfont->descent;
 324         }
 325         dc.font.height = dc.font.ascent + dc.font.descent;
 326 }
 327
 328 void
 329 kpress(XKeyEvent * e) {
 330         char buf[32];
 331         int i, num;
 332         unsigned int len;
 333         KeySym ksym;
 334
 335         len = strlen(text);
 336         buf[0] = 0;
 337         num = XLookupString(e, buf, sizeof buf, &ksym, 0);
 338         if(IsKeypadKey(ksym)) {
 339                 if(ksym == XK_KP_Enter) {
 340                         ksym = XK_Return;
 341                 } else if(ksym >= XK_KP_0 && ksym <= XK_KP_9) {
 342                         ksym = (ksym - XK_KP_0) + XK_0;
 343                 }
 344         }
 345         if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
 346                         || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
 347                         || IsPrivateKeypadKey(ksym))
 348                 return;
 349         /* first check if a control mask is omitted */
 350         if(e->state & ControlMask) {
 351                 switch (ksym) {
 352                 default:        /* ignore other control sequences */
 353                         return;
 354                 case XK_bracketleft:
 355                         ksym = XK_Escape;
 356                         break;
 357                 case XK_h:
 358                 case XK_H:
 359                         ksym = XK_BackSpace;
 360                         break;
 361                 case XK_i:
 362                 case XK_I:
 363                         ksym = XK_Tab;
 364                         break;
 365                 case XK_j:
 366                 case XK_J:
 367                         ksym = XK_Return;
 368                         break;
 369                 case XK_u:
 370                 case XK_U:
 371                         text[0] = 0;
 372                         match(text);
 373                         drawmenu();
 374                         return;
 375                 case XK_w:
 376                 case XK_W:
 377                         if(len) {
 378                                 i = len - 1;
 379                                 while(i >= 0 && text[i] == ' ')
 380                                         text[i--] = 0;
 381                                 while(i >= 0 && text[i] != ' ')
 382                                         text[i--] = 0;
 383                                 match(text);
 384                                 drawmenu();
 385                         }
 386                         return;
 387                 }
 388         }
 389         if(CLEANMASK(e->state) & Mod1Mask) {
 390                 switch(ksym) {
 391                 default: return;
 392                 case XK_h:
 393                         ksym = XK_Left;
 394                         break;
 395                 case XK_l:
 396                         ksym = XK_Right;
 397                         break;
 398                 case XK_j:
 399                         ksym = XK_Next;
 400                         break;
 401                 case XK_k:
 402                         ksym = XK_Prior;
 403                         break;
 404                 case XK_g:
 405                         ksym = XK_Home;
 406                         break;
 407                 case XK_G:
 408                         ksym = XK_End;
 409                         break;
 410                 }
 411         }
 412         switch(ksym) {
 413         default:
 414                 if(num && !iscntrl((int) buf[0])) {
 415                         buf[num] = 0;
 416                         if(len > 0)
 417                                 strncat(text, buf, sizeof text);
 418                         else
 419                                 strncpy(text, buf, sizeof text);
 420                         match(text);
 421                 }
 422                 break;
 423         case XK_BackSpace:
 424                 if(len) {
 425                         text[--len] = 0;
 426                         match(text);
 427                 }
 428                 break;
 429         case XK_End:
 430                 if(!item)
 431                         return;
 432                 while(next) {
 433                         sel = curr = next;
 434                         calcoffsets();
 435                 }
 436                 while(sel && sel->right)
 437                         sel = sel->right;
 438                 break;
 439         case XK_Escape:
 440                 ret = 1;
 441                 running = False;
 442                 break;
 443         case XK_Home:
 444                 if(!item)
 445                         return;
 446                 sel = curr = item;
 447                 calcoffsets();
 448                 break;
 449         case XK_Left:
 450                 if(!(sel && sel->left))
 451                         return;
 452                 sel=sel->left;
 453                 if(sel->right == curr) {
 454                         curr = prev;
 455                         calcoffsets();
 456                 }
 457                 break;
 458         case XK_Next:
 459                 if(!next)
 460                         return;
 461                 sel = curr = next;
 462                 calcoffsets();
 463                 break;
 464         case XK_Prior:
 465                 if(!prev)
 466                         return;
 467                 sel = curr = prev;
 468                 calcoffsets();
 469                 break;
 470         case XK_Return:
 471                 if((e->state & ShiftMask) && text)
 472                         fprintf(stdout, "%s", text);
 473                 else if(sel)
 474                         fprintf(stdout, "%s", sel->text);
 475                 else if(text)
 476                         fprintf(stdout, "%s", text);
 477                 fflush(stdout);
 478                 running = False;
 479                 break;
 480         case XK_Right:
 481                 if(!(sel && sel->right))
 482                         return;
 483                 sel=sel->right;
 484                 if(sel == next) {
 485                         curr = next;
 486                         calcoffsets();
 487                 }
 488                 break;
 489         case XK_Tab:
 490                 if(!sel)
 491                         return;
 492                 strncpy(text, sel->text, sizeof text);
 493                 match(text);
 494                 break;
 495         }
 496         drawmenu();
 497 }
 498
 499 void
 500 match(char *pattern) {
 501         unsigned int plen;
 502         Item *i, *j;
 503
 504         if(!pattern)
 505                 return;
 506         plen = strlen(pattern);
 507         item = j = NULL;
 508         nitem = 0;
 509         for(i = allitems; i; i=i->next)
 510                 i->matched = False;
 511         for(i = allitems; i; i = i->next)
 512                 if(!i->matched && !strncasecmp(pattern, i->text, plen))
 513                         j = appenditem(i, j);
 514         for(i = allitems; i; i = i->next)
 515                 if(!i->matched && cistrstr(i->text, pattern))
 516                         j = appenditem(i, j);
 517         if(idomatch)
 518                 for(i = allitems; i; i = i->next)
 519                         if(!i->matched && strcaseido(i->text, pattern))
 520                                 j = appenditem(i, j);
 521         curr = prev = next = sel = item;
 522         calcoffsets();
 523 }
 524
 525 void
 526 readstdin(void) {
 527         char *p, buf[1024];
 528         unsigned int len = 0, max = 0;
 529         Item *i, *new;
 530
 531         i = 0;
 532         while(fgets(buf, sizeof buf, stdin)) {
 533                 len = strlen(buf);
 534                 if (buf[len - 1] == '\n')
 535                         buf[len - 1] = 0;
 536                 p = estrdup(buf);
 537                 if(max < len) {
 538                         maxname = p;
 539                         max = len;
 540                 }
 541                 new = emalloc(sizeof(Item));
 542                 new->next = new->left = new->right = NULL;
 543                 new->text = p;
 544                 if(!i)
 545                         allitems = new;
 546                 else
 547                         i->next = new;
 548                 i = new;
 549         }
 550 }
 551
 552 void
 553 run(void) {
 554         XEvent ev;
 555
 556         /* main event loop */
 557         while(running && !XNextEvent(dpy, &ev))
 558                 switch (ev.type) {
 559                 default:        /* ignore all crap */
 560                         break;
 561                 case KeyPress:
 562                         kpress(&ev.xkey);
 563                         break;
 564                 case Expose:
 565                         if(ev.xexpose.count == 0)
 566                                 drawmenu();
 567                         break;
 568                 }
 569 }
 570
 571 void
 572 setup(Bool bottom) {
 573         unsigned int i, j;
 574         XModifierKeymap *modmap;
 575         XSetWindowAttributes wa;
 576
 577         /* init modifier map */
 578         modmap = XGetModifierMapping(dpy);
 579         for(i = 0; i < 8; i++)
 580                 for(j = 0; j < modmap->max_keypermod; j++) {
 581                         if(modmap->modifiermap[i * modmap->max_keypermod + j]
 582                         == XKeysymToKeycode(dpy, XK_Num_Lock))
 583                                 numlockmask = (1 << i);
 584                 }
 585         XFreeModifiermap(modmap);
 586
 587         /* style */
 588         dc.norm[ColBG] = getcolor(normbg);
 589         dc.norm[ColFG] = getcolor(normfg);
 590         dc.sel[ColBG] = getcolor(selbg);
 591         dc.sel[ColFG] = getcolor(selfg);
 592         initfont(font);
 593
 594         /* menu window */
 595         wa.override_redirect = 1;
 596         wa.background_pixmap = ParentRelative;
 597         wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask;
 598         mw = DisplayWidth(dpy, screen);
 599         mh = dc.font.height + 2;
 600         win = XCreateWindow(dpy, root, 0,
 601                         bottom ? DisplayHeight(dpy, screen) - mh : 0, mw, mh, 0,
 602                         DefaultDepth(dpy, screen), CopyFromParent,
 603                         DefaultVisual(dpy, screen),
 604                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 605
 606         /* pixmap */
 607         dc.drawable = XCreatePixmap(dpy, root, mw, mh, DefaultDepth(dpy, screen));
 608         dc.gc = XCreateGC(dpy, root, 0, 0);
 609         XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
 610         if(!dc.font.set)
 611                 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
 612         if(maxname)
 613                 cmdw = textw(maxname);
 614         if(cmdw > mw / 3)
 615                 cmdw = mw / 3;
 616         if(prompt)
 617                 promptw = textw(prompt);
 618         if(promptw > mw / 5)
 619                 promptw = mw / 5;
 620         text[0] = 0;
 621         match(text);
 622         XMapRaised(dpy, win);
 623 }
 624
 625 int
 626 strcaseido(const char *text, const char *pattern) {
 627         for(; *text && *pattern; text++)
 628                 if(tolower((int)*text) == tolower((int)*pattern))
 629                         pattern++;
 630         return !*pattern;
 631 }
 632
 633 char *
 634 cistrstr(const char *s, const char *sub) {
 635         int c, csub;
 636         unsigned int len;
 637
 638         if(!sub)
 639                 return (char *)s;
 640         if((c = *sub++) != 0) {
 641                 c = tolower(c);
 642                 len = strlen(sub);
 643                 do {
 644                         do {
 645                                 if((csub = *s++) == 0)
 646                                         return (NULL);
 647                         }
 648                         while(tolower(csub) != c);
 649                 }
 650                 while(strncasecmp(s, sub, len) != 0);
 651                 s--;
 652         }
 653         return (char *)s;
 654 }
 655
 656 unsigned int
 657 textnw(const char *text, unsigned int len) {
 658         XRectangle r;
 659
 660         if(dc.font.set) {
 661                 XmbTextExtents(dc.font.set, text, len, NULL, &r);
 662                 return r.width;
 663         }
 664         return XTextWidth(dc.font.xfont, text, len);
 665 }
 666
 667 unsigned int
 668 textw(const char *text) {
 669         return textnw(text, strlen(text)) + dc.font.height;
 670 }
 671
 672 int
 673 main(int argc, char *argv[]) {
 674         Bool bottom = False;
 675         unsigned int i;
 676
 677         /* command line args */
 678         for(i = 1; i < argc; i++)
 679                 if(!strcmp(argv[i], "-b")) {
 680                         bottom = True;
 681                 }
 682                 else if(!strcmp(argv[i], "-i"))
 683                         idomatch = True;
 684                 else if(!strcmp(argv[i], "-fn")) {
 685                         if(++i < argc) font = argv[i];
 686                 }
 687                 else if(!strcmp(argv[i], "-nb")) {
 688                         if(++i < argc) normbg = argv[i];
 689                 }
 690                 else if(!strcmp(argv[i], "-nf")) {
 691                         if(++i < argc) normfg = argv[i];
 692                 }
 693                 else if(!strcmp(argv[i], "-p")) {
 694                         if(++i < argc) prompt = argv[i];
 695                 }
 696                 else if(!strcmp(argv[i], "-sb")) {
 697                         if(++i < argc) selbg = argv[i];
 698                 }
 699                 else if(!strcmp(argv[i], "-sf")) {
 700                         if(++i < argc) selfg = argv[i];
 701                 }
 702                 else if(!strcmp(argv[i], "-v"))
 703                         eprint("dmenu-"VERSION", © 2006-2007 Anselm R. Garbe, Sander van Dijk, Michał Janeczek\n");
 704                 else
 705                         eprint("usage: dmenu [-b] [-i] [-fn <font>] [-nb <color>] [-nf <color>]\n"
 706                         "             [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n");
 707         setlocale(LC_CTYPE, "");
 708         dpy = XOpenDisplay(0);
 709         if(!dpy)
 710                 eprint("dmenu: cannot open display\n");
 711         screen = DefaultScreen(dpy);
 712         root = RootWindow(dpy, screen);
 713
 714         if(isatty(STDIN_FILENO)) {
 715                 readstdin();
 716                 running = grabkeyboard();
 717         }
 718         else { /* prevent keypress loss */
 719                 running = grabkeyboard();
 720                 readstdin();
 721         }
 722
 723         setup(bottom);
 724         drawmenu();
 725         XSync(dpy, False);
 726         run();
 727         cleanup();
 728         XCloseDisplay(dpy);
 729         return ret;
 730 }