main.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include "dmenu.h"
   3 #include <ctype.h>
   4 #include <locale.h>
   5 #include <stdlib.h>
   6 #include <stdio.h>
   7 #include <string.h>
   8 #include <unistd.h>
   9 #include <X11/Xutil.h>
  10 #include <X11/keysym.h>
  11
  12 #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
  13
  14 typedef struct Item Item;
  15 struct Item {
  16         Item *next;             /* traverses all items */
  17         Item *left, *right;     /* traverses items matching current search pattern */
  18         char *text;
  19 };
  20
  21 /* static */
  22
  23 static char text[4096];
  24 static char *prompt = NULL;
  25 static int mw, mh;
  26 static int ret = 0;
  27 static int nitem = 0;
  28 static unsigned int cmdw = 0;
  29 static unsigned int promptw = 0;
  30 static unsigned int numlockmask = 0;
  31 static Bool running = True;
  32 static Item *allitems = NULL;   /* first of all items */
  33 static Item *item = NULL;       /* first of pattern matching items */
  34 static Item *sel = NULL;
  35 static Item *next = NULL;
  36 static Item *prev = NULL;
  37 static Item *curr = NULL;
  38 static Window root;
  39 static Window win;
  40
  41 static void
  42 calcoffsets(void) {
  43         unsigned int tw, w;
  44
  45         if(!curr)
  46                 return;
  47         w = promptw + cmdw + 2 * SPACE;
  48         for(next = curr; next; next=next->right) {
  49                 tw = textw(next->text);
  50                 if(tw > mw / 3)
  51                         tw = mw / 3;
  52                 w += tw;
  53                 if(w > mw)
  54                         break;
  55         }
  56         w = promptw + cmdw + 2 * SPACE;
  57         for(prev = curr; prev && prev->left; prev=prev->left) {
  58                 tw = textw(prev->left->text);
  59                 if(tw > mw / 3)
  60                         tw = mw / 3;
  61                 w += tw;
  62                 if(w > mw)
  63                         break;
  64         }
  65 }
  66
  67 static void
  68 drawmenu(void) {
  69         Item *i;
  70
  71         dc.x = 0;
  72         dc.y = 0;
  73         dc.w = mw;
  74         dc.h = mh;
  75         drawtext(NULL, dc.norm);
  76         /* print prompt? */
  77         if(promptw) {
  78                 dc.w = promptw;
  79                 drawtext(prompt, dc.sel);
  80         }
  81         dc.x += promptw;
  82         dc.w = mw - promptw;
  83         /* print command */
  84         if(cmdw && item)
  85                 dc.w = cmdw;
  86         drawtext(text[0] ? text : NULL, dc.norm);
  87         dc.x += cmdw;
  88         if(curr) {
  89                 dc.w = SPACE;
  90                 drawtext((curr && curr->left) ? "<" : NULL, dc.norm);
  91                 dc.x += dc.w;
  92                 /* determine maximum items */
  93                 for(i = curr; i != next; i=i->right) {
  94                         dc.w = textw(i->text);
  95                         if(dc.w > mw / 3)
  96                                 dc.w = mw / 3;
  97                         drawtext(i->text, (sel == i) ? dc.sel : dc.norm);
  98                         dc.x += dc.w;
  99                 }
 100                 dc.x = mw - SPACE;
 101                 dc.w = SPACE;
 102                 drawtext(next ? ">" : NULL, dc.norm);
 103         }
 104         XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
 105         XFlush(dpy);
 106 }
 107
 108 static Bool
 109 grabkeyboard(void) {
 110         unsigned int len;
 111
 112         for(len = 1000; len; len--) {
 113                 if(XGrabKeyboard(dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime)
 114                         == GrabSuccess)
 115                         break;
 116                 usleep(1000);
 117         }
 118         return len > 0;
 119 }
 120
 121 static unsigned long
 122 initcolor(const char *colstr) {
 123         Colormap cmap = DefaultColormap(dpy, screen);
 124         XColor color;
 125
 126         if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
 127                 eprint("error, cannot allocate color '%s'\n", colstr);
 128         return color.pixel;
 129 }
 130
 131 static void
 132 initfont(const char *fontstr) {
 133         char *def, **missing;
 134         int i, n;
 135
 136         if(!fontstr || fontstr[0] == '\0')
 137                 eprint("error, cannot load font: '%s'\n", fontstr);
 138         missing = NULL;
 139         if(dc.font.set)
 140                 XFreeFontSet(dpy, dc.font.set);
 141         dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
 142         if(missing)
 143                 XFreeStringList(missing);
 144         if(dc.font.set) {
 145                 XFontSetExtents *font_extents;
 146                 XFontStruct **xfonts;
 147                 char **font_names;
 148                 dc.font.ascent = dc.font.descent = 0;
 149                 font_extents = XExtentsOfFontSet(dc.font.set);
 150                 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
 151                 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
 152                         if(dc.font.ascent < (*xfonts)->ascent)
 153                                 dc.font.ascent = (*xfonts)->ascent;
 154                         if(dc.font.descent < (*xfonts)->descent)
 155                                 dc.font.descent = (*xfonts)->descent;
 156                         xfonts++;
 157                 }
 158         }
 159         else {
 160                 if(dc.font.xfont)
 161                         XFreeFont(dpy, dc.font.xfont);
 162                 dc.font.xfont = NULL;
 163                 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))) {
 164                         if(!(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
 165                                 eprint("error, cannot load font: '%s'\n", fontstr);
 166                 }
 167                 dc.font.ascent = dc.font.xfont->ascent;
 168                 dc.font.descent = dc.font.xfont->descent;
 169         }
 170         dc.font.height = dc.font.ascent + dc.font.descent;
 171 }
 172
 173 static int
 174 strido(const char *text, const char *pattern) {
 175         for(; *text && *pattern; text++)
 176                 if (*text == *pattern)
 177                         pattern++;
 178         return !*pattern;
 179 }
 180
 181 static void
 182 match(char *pattern) {
 183         unsigned int plen;
 184         Item *i, *j;
 185
 186         if(!pattern)
 187                 return;
 188         plen = strlen(pattern);
 189         item = j = NULL;
 190         nitem = 0;
 191         for(i = allitems; i; i=i->next)
 192                 if(!plen || !strncmp(pattern, i->text, plen)) {
 193                         if(!j)
 194                                 item = i;
 195                         else
 196                                 j->right = i;
 197                         i->left = j;
 198                         i->right = NULL;
 199                         j = i;
 200                         nitem++;
 201                 }
 202         for(i = allitems; i; i=i->next)
 203                 if(plen && strncmp(pattern, i->text, plen)
 204                                 && strstr(i->text, pattern)) {
 205                         if(!j)
 206                                 item = i;
 207                         else
 208                                 j->right = i;
 209                         i->left = j;
 210                         i->right = NULL;
 211                         j = i;
 212                         nitem++;
 213                 }
 214         for(i = allitems; i; i=i->next)
 215                 if(plen && strncmp(pattern, i->text, plen)
 216                                 && !strstr(i->text, pattern)
 217                                 && strido(i->text,pattern)) {
 218                         if(!j)
 219                                 item = i;
 220                         else
 221                                 j->right = i;
 222                         i->left = j;
 223                         i->right = NULL;
 224                         j = i;
 225                         nitem++;
 226                 }
 227         curr = prev = next = sel = item;
 228         calcoffsets();
 229 }
 230
 231 static void
 232 kpress(XKeyEvent * e) {
 233         char buf[32];
 234         int i, num;
 235         unsigned int len;
 236         KeySym ksym;
 237
 238         len = strlen(text);
 239         buf[0] = 0;
 240         num = XLookupString(e, buf, sizeof buf, &ksym, 0);
 241         if(IsKeypadKey(ksym)) {
 242                 if(ksym == XK_KP_Enter) {
 243                         ksym = XK_Return;
 244                 } else if(ksym >= XK_KP_0 && ksym <= XK_KP_9) {
 245                         ksym = (ksym - XK_KP_0) + XK_0;
 246                 }
 247         }
 248         if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
 249                         || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
 250                         || IsPrivateKeypadKey(ksym))
 251                 return;
 252         /* first check if a control mask is omitted */
 253         if(e->state & ControlMask) {
 254                 switch (ksym) {
 255                 default:        /* ignore other control sequences */
 256                         return;
 257                 case XK_bracketleft:
 258                         ksym = XK_Escape;
 259                         break;
 260                 case XK_h:
 261                 case XK_H:
 262                         ksym = XK_BackSpace;
 263                         break;
 264                 case XK_i:
 265                 case XK_I:
 266                         ksym = XK_Tab;
 267                         break;
 268                 case XK_j:
 269                 case XK_J:
 270                         ksym = XK_Return;
 271                         break;
 272                 case XK_u:
 273                 case XK_U:
 274                         text[0] = 0;
 275                         match(text);
 276                         drawmenu();
 277                         return;
 278                 case XK_w:
 279                 case XK_W:
 280                         if(len) {
 281                                 i = len - 1;
 282                                 while(i >= 0 && text[i] == ' ')
 283                                         text[i--] = 0;
 284                                 while(i >= 0 && text[i] != ' ')
 285                                         text[i--] = 0;
 286                                 match(text);
 287                                 drawmenu();
 288                         }
 289                         return;
 290                 }
 291         }
 292         if(CLEANMASK(e->state) & Mod1Mask) {
 293                 switch(ksym) {
 294                 default: return;
 295                 case XK_h:
 296                         ksym = XK_Left;
 297                         break;
 298                 case XK_l:
 299                         ksym = XK_Right;
 300                         break;
 301                 case XK_j:
 302                         ksym = XK_Next;
 303                         break;
 304                 case XK_k:
 305                         ksym = XK_Prior;
 306                         break;
 307                 case XK_g:
 308                         ksym = XK_Home;
 309                         break;
 310                 case XK_G:
 311                         ksym = XK_End;
 312                         break;
 313                 }
 314         }
 315         switch(ksym) {
 316         default:
 317                 if(num && !iscntrl((int) buf[0])) {
 318                         buf[num] = 0;
 319                         if(len > 0)
 320                                 strncat(text, buf, sizeof text);
 321                         else
 322                                 strncpy(text, buf, sizeof text);
 323                         match(text);
 324                 }
 325                 break;
 326         case XK_BackSpace:
 327                 if(len) {
 328                         text[--len] = 0;
 329                         match(text);
 330                 }
 331                 break;
 332         case XK_End:
 333                 if(!item)
 334                         return;
 335                 while(next) {
 336                         sel = curr = next;
 337                         calcoffsets();
 338                 }
 339                 while(sel && sel->right)
 340                         sel = sel->right;
 341                 break;
 342         case XK_Escape:
 343                 ret = 1;
 344                 running = False;
 345                 break;
 346         case XK_Home:
 347                 if(!item)
 348                         return;
 349                 sel = curr = item;
 350                 calcoffsets();
 351                 break;
 352         case XK_Left:
 353                 if(!(sel && sel->left))
 354                         return;
 355                 sel=sel->left;
 356                 if(sel->right == curr) {
 357                         curr = prev;
 358                         calcoffsets();
 359                 }
 360                 break;
 361         case XK_Next:
 362                 if(!next)
 363                         return;
 364                 sel = curr = next;
 365                 calcoffsets();
 366                 break;
 367         case XK_Prior:
 368                 if(!prev)
 369                         return;
 370                 sel = curr = prev;
 371                 calcoffsets();
 372                 break;
 373         case XK_Return:
 374                 if((e->state & ShiftMask) && text)
 375                         fprintf(stdout, "%s", text);
 376                 else if(sel)
 377                         fprintf(stdout, "%s", sel->text);
 378                 else if(text)
 379                         fprintf(stdout, "%s", text);
 380                 fflush(stdout);
 381                 running = False;
 382                 break;
 383         case XK_Right:
 384                 if(!(sel && sel->right))
 385                         return;
 386                 sel=sel->right;
 387                 if(sel == next) {
 388                         curr = next;
 389                         calcoffsets();
 390                 }
 391                 break;
 392         case XK_Tab:
 393                 if(!sel)
 394                         return;
 395                 strncpy(text, sel->text, sizeof text);
 396                 match(text);
 397                 break;
 398         }
 399         drawmenu();
 400 }
 401
 402 static char *
 403 readstdin(void) {
 404         static char *maxname = NULL;
 405         char *p, buf[1024];
 406         unsigned int len = 0, max = 0;
 407         Item *i, *new;
 408
 409         i = 0;
 410         while(fgets(buf, sizeof buf, stdin)) {
 411                 len = strlen(buf);
 412                 if (buf[len - 1] == '\n')
 413                         buf[len - 1] = 0;
 414                 p = estrdup(buf);
 415                 if(max < len) {
 416                         maxname = p;
 417                         max = len;
 418                 }
 419                 new = emalloc(sizeof(Item));
 420                 new->next = new->left = new->right = NULL;
 421                 new->text = p;
 422                 if(!i)
 423                         allitems = new;
 424                 else
 425                         i->next = new;
 426                 i = new;
 427         }
 428
 429         return maxname;
 430 }
 431
 432 static void
 433 usage(void) {
 434         eprint("usage: dmenu [-b] [-fn <font>] [-nb <color>] [-nf <color>]\n"
 435                 "             [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n");
 436 }
 437
 438 /* extern */
 439
 440 int screen;
 441 Display *dpy;
 442 DC dc = {0};
 443
 444 int
 445 main(int argc, char *argv[]) {
 446         Bool bottom = False;
 447         char *font = FONT;
 448         char *maxname;
 449         char *normbg = NORMBGCOLOR;
 450         char *normfg = NORMFGCOLOR;
 451         char *selbg = SELBGCOLOR;
 452         char *selfg = SELFGCOLOR;
 453         int i, j;
 454         Item *itm;
 455         XEvent ev;
 456         XModifierKeymap *modmap;
 457         XSetWindowAttributes wa;
 458
 459         /* command line args */
 460         for(i = 1; i < argc; i++)
 461                 if(!strcmp(argv[i], "-b")) {
 462                         bottom = True;
 463                 }
 464                 else if(!strcmp(argv[i], "-fn")) {
 465                         if(++i < argc) font = argv[i];
 466                 }
 467                 else if(!strcmp(argv[i], "-nb")) {
 468                         if(++i < argc) normbg = argv[i];
 469                 }
 470                 else if(!strcmp(argv[i], "-nf")) {
 471                         if(++i < argc) normfg = argv[i];
 472                 }
 473                 else if(!strcmp(argv[i], "-p")) {
 474                         if(++i < argc) prompt = argv[i];
 475                 }
 476                 else if(!strcmp(argv[i], "-sb")) {
 477                         if(++i < argc) selbg = argv[i];
 478                 }
 479                 else if(!strcmp(argv[i], "-sf")) {
 480                         if(++i < argc) selfg = argv[i];
 481                 }
 482                 else if(!strcmp(argv[i], "-v"))
 483                         eprint("dmenu-"VERSION", © 2006-2007 Anselm R. Garbe, Sander van Dijk\n");
 484                 else
 485                         usage();
 486         setlocale(LC_CTYPE, "");
 487         dpy = XOpenDisplay(0);
 488         if(!dpy)
 489                 eprint("dmenu: cannot open display\n");
 490         screen = DefaultScreen(dpy);
 491         root = RootWindow(dpy, screen);
 492         if(isatty(STDIN_FILENO)) {
 493                 maxname = readstdin();
 494                 running = grabkeyboard();
 495         }
 496         else { /* prevent keypress loss */
 497                 running = grabkeyboard();
 498                 maxname = readstdin();
 499         }
 500         /* init modifier map */
 501         modmap = XGetModifierMapping(dpy);
 502         for (i = 0; i < 8; i++) {
 503                 for (j = 0; j < modmap->max_keypermod; j++) {
 504                         if(modmap->modifiermap[i * modmap->max_keypermod + j]
 505                         == XKeysymToKeycode(dpy, XK_Num_Lock))
 506                                 numlockmask = (1 << i);
 507                 }
 508         }
 509         XFreeModifiermap(modmap);
 510         /* style */
 511         dc.norm[ColBG] = initcolor(normbg);
 512         dc.norm[ColFG] = initcolor(normfg);
 513         dc.sel[ColBG] = initcolor(selbg);
 514         dc.sel[ColFG] = initcolor(selfg);
 515         initfont(font);
 516         /* menu window */
 517         wa.override_redirect = 1;
 518         wa.background_pixmap = ParentRelative;
 519         wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask;
 520         mw = DisplayWidth(dpy, screen);
 521         mh = dc.font.height + 2;
 522         win = XCreateWindow(dpy, root, 0,
 523                         bottom ? DisplayHeight(dpy, screen) - mh : 0, mw, mh, 0,
 524                         DefaultDepth(dpy, screen), CopyFromParent,
 525                         DefaultVisual(dpy, screen),
 526                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 527         /* pixmap */
 528         dc.drawable = XCreatePixmap(dpy, root, mw, mh, DefaultDepth(dpy, screen));
 529         dc.gc = XCreateGC(dpy, root, 0, 0);
 530         XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
 531         if(!dc.font.set)
 532                 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
 533         if(maxname)
 534                 cmdw = textw(maxname);
 535         if(cmdw > mw / 3)
 536                 cmdw = mw / 3;
 537         if(prompt)
 538                 promptw = textw(prompt);
 539         if(promptw > mw / 5)
 540                 promptw = mw / 5;
 541         text[0] = 0;
 542         match(text);
 543         XMapRaised(dpy, win);
 544         drawmenu();
 545         XSync(dpy, False);
 546
 547         /* main event loop */
 548         while(running && !XNextEvent(dpy, &ev))
 549                 switch (ev.type) {
 550                 default:        /* ignore all crap */
 551                         break;
 552                 case KeyPress:
 553                         kpress(&ev.xkey);
 554                         break;
 555                 case Expose:
 556                         if(ev.xexpose.count == 0)
 557                                 drawmenu();
 558                         break;
 559                 }
 560
 561         /* cleanup */
 562         while(allitems) {
 563                 itm = allitems->next;
 564                 free(allitems->text);
 565                 free(allitems);
 566                 allitems = itm;
 567         }
 568         if(dc.font.set)
 569                 XFreeFontSet(dpy, dc.font.set);
 570         else
 571                 XFreeFont(dpy, dc.font.xfont);
 572         XFreePixmap(dpy, dc.drawable);
 573         XFreeGC(dpy, dc.gc);
 574         XDestroyWindow(dpy, win);
 575         XUngrabKeyboard(dpy, CurrentTime);
 576         XCloseDisplay(dpy);
 577         return ret;
 578 }