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                         eprint("error, cannot load font: '%s'\n", fontstr);
 165                 dc.font.ascent = dc.font.xfont->ascent;
 166                 dc.font.descent = dc.font.xfont->descent;
 167         }
 168         dc.font.height = dc.font.ascent + dc.font.descent;
 169 }
 170
 171 static int
 172 strido(const char *text, const char *pattern) {
 173         for(; *text && *pattern; text++)
 174                 if (*text == *pattern)
 175                         pattern++;
 176         return !*pattern;
 177 }
 178
 179 static void
 180 match(char *pattern) {
 181         unsigned int plen;
 182         Item *i, *j;
 183
 184         if(!pattern)
 185                 return;
 186         plen = strlen(pattern);
 187         item = j = NULL;
 188         nitem = 0;
 189         for(i = allitems; i; i=i->next)
 190                 if(!plen || !strncmp(pattern, i->text, plen)) {
 191                         if(!j)
 192                                 item = i;
 193                         else
 194                                 j->right = i;
 195                         i->left = j;
 196                         i->right = NULL;
 197                         j = i;
 198                         nitem++;
 199                 }
 200         for(i = allitems; i; i=i->next)
 201                 if(plen && strncmp(pattern, i->text, plen)
 202                                 && strstr(i->text, pattern)) {
 203                         if(!j)
 204                                 item = i;
 205                         else
 206                                 j->right = i;
 207                         i->left = j;
 208                         i->right = NULL;
 209                         j = i;
 210                         nitem++;
 211                 }
 212         for(i = allitems; i; i=i->next)
 213                 if(plen && strncmp(pattern, i->text, plen)
 214                                 && !strstr(i->text, pattern)
 215                                 && strido(i->text,pattern)) {
 216                         if(!j)
 217                                 item = i;
 218                         else
 219                                 j->right = i;
 220                         i->left = j;
 221                         i->right = NULL;
 222                         j = i;
 223                         nitem++;
 224                 }
 225         curr = prev = next = sel = item;
 226         calcoffsets();
 227 }
 228
 229 static void
 230 kpress(XKeyEvent * e) {
 231         char buf[32];
 232         int i, num;
 233         unsigned int len;
 234         KeySym ksym;
 235
 236         len = strlen(text);
 237         buf[0] = 0;
 238         num = XLookupString(e, buf, sizeof buf, &ksym, 0);
 239         if(IsKeypadKey(ksym)) {
 240                 if(ksym == XK_KP_Enter) {
 241                         ksym = XK_Return;
 242                 } else if(ksym >= XK_KP_0 && ksym <= XK_KP_9) {
 243                         ksym = (ksym - XK_KP_0) + XK_0;
 244                 }
 245         }
 246         if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
 247                         || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
 248                         || IsPrivateKeypadKey(ksym))
 249                 return;
 250         /* first check if a control mask is omitted */
 251         if(e->state & ControlMask) {
 252                 switch (ksym) {
 253                 default:        /* ignore other control sequences */
 254                         return;
 255                 case XK_bracketleft:
 256                         ksym = XK_Escape;
 257                         break;
 258                 case XK_h:
 259                 case XK_H:
 260                         ksym = XK_BackSpace;
 261                         break;
 262                 case XK_i:
 263                 case XK_I:
 264                         ksym = XK_Tab;
 265                         break;
 266                 case XK_j:
 267                 case XK_J:
 268                         ksym = XK_Return;
 269                         break;
 270                 case XK_u:
 271                 case XK_U:
 272                         text[0] = 0;
 273                         match(text);
 274                         drawmenu();
 275                         return;
 276                 case XK_w:
 277                 case XK_W:
 278                         if(len) {
 279                                 i = len - 1;
 280                                 while(i >= 0 && text[i] == ' ')
 281                                         text[i--] = 0;
 282                                 while(i >= 0 && text[i] != ' ')
 283                                         text[i--] = 0;
 284                                 match(text);
 285                                 drawmenu();
 286                         }
 287                         return;
 288                 }
 289         }
 290         if(CLEANMASK(e->state) & Mod1Mask) {
 291                 switch(ksym) {
 292                 default: return;
 293                 case XK_h:
 294                         ksym = XK_Left;
 295                         break;
 296                 case XK_l:
 297                         ksym = XK_Right;
 298                         break;
 299                 case XK_j:
 300                         ksym = XK_Next;
 301                         break;
 302                 case XK_k:
 303                         ksym = XK_Prior;
 304                         break;
 305                 case XK_g:
 306                         ksym = XK_Home;
 307                         break;
 308                 case XK_G:
 309                         ksym = XK_End;
 310                         break;
 311                 }
 312         }
 313         switch(ksym) {
 314         default:
 315                 if(num && !iscntrl((int) buf[0])) {
 316                         buf[num] = 0;
 317                         if(len > 0)
 318                                 strncat(text, buf, sizeof text);
 319                         else
 320                                 strncpy(text, buf, sizeof text);
 321                         match(text);
 322                 }
 323                 break;
 324         case XK_BackSpace:
 325                 if(len) {
 326                         text[--len] = 0;
 327                         match(text);
 328                 }
 329                 break;
 330         case XK_End:
 331                 if(!item)
 332                         return;
 333                 while(next) {
 334                         sel = curr = next;
 335                         calcoffsets();
 336                 }
 337                 while(sel && sel->right)
 338                         sel = sel->right;
 339                 break;
 340         case XK_Escape:
 341                 ret = 1;
 342                 running = False;
 343                 break;
 344         case XK_Home:
 345                 if(!item)
 346                         return;
 347                 sel = curr = item;
 348                 calcoffsets();
 349                 break;
 350         case XK_Left:
 351                 if(!(sel && sel->left))
 352                         return;
 353                 sel=sel->left;
 354                 if(sel->right == curr) {
 355                         curr = prev;
 356                         calcoffsets();
 357                 }
 358                 break;
 359         case XK_Next:
 360                 if(!next)
 361                         return;
 362                 sel = curr = next;
 363                 calcoffsets();
 364                 break;
 365         case XK_Prior:
 366                 if(!prev)
 367                         return;
 368                 sel = curr = prev;
 369                 calcoffsets();
 370                 break;
 371         case XK_Return:
 372                 if((e->state & ShiftMask) && text)
 373                         fprintf(stdout, "%s", text);
 374                 else if(sel)
 375                         fprintf(stdout, "%s", sel->text);
 376                 else if(text)
 377                         fprintf(stdout, "%s", text);
 378                 fflush(stdout);
 379                 running = False;
 380                 break;
 381         case XK_Right:
 382                 if(!(sel && sel->right))
 383                         return;
 384                 sel=sel->right;
 385                 if(sel == next) {
 386                         curr = next;
 387                         calcoffsets();
 388                 }
 389                 break;
 390         case XK_Tab:
 391                 if(!sel)
 392                         return;
 393                 strncpy(text, sel->text, sizeof text);
 394                 match(text);
 395                 break;
 396         }
 397         drawmenu();
 398 }
 399
 400 static char *
 401 readstdin(void) {
 402         static char *maxname = NULL;
 403         char *p, buf[1024];
 404         unsigned int len = 0, max = 0;
 405         Item *i, *new;
 406
 407         i = 0;
 408         while(fgets(buf, sizeof buf, stdin)) {
 409                 len = strlen(buf);
 410                 if (buf[len - 1] == '\n')
 411                         buf[len - 1] = 0;
 412                 p = estrdup(buf);
 413                 if(max < len) {
 414                         maxname = p;
 415                         max = len;
 416                 }
 417                 new = emalloc(sizeof(Item));
 418                 new->next = new->left = new->right = NULL;
 419                 new->text = p;
 420                 if(!i)
 421                         allitems = new;
 422                 else
 423                         i->next = new;
 424                 i = new;
 425         }
 426
 427         return maxname;
 428 }
 429
 430 static void
 431 usage(void) {
 432         eprint("usage: dmenu [-b] [-fn <font>] [-nb <color>] [-nf <color>]\n"
 433                 "             [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n");
 434 }
 435
 436 /* extern */
 437
 438 int screen;
 439 Display *dpy;
 440 DC dc = {0};
 441
 442 int
 443 main(int argc, char *argv[]) {
 444         Bool bottom = False;
 445         char *font = FONT;
 446         char *maxname;
 447         char *normbg = NORMBGCOLOR;
 448         char *normfg = NORMFGCOLOR;
 449         char *selbg = SELBGCOLOR;
 450         char *selfg = SELFGCOLOR;
 451         int i, j;
 452         Item *itm;
 453         XEvent ev;
 454         XModifierKeymap *modmap;
 455         XSetWindowAttributes wa;
 456
 457         /* command line args */
 458         for(i = 1; i < argc; i++)
 459                 if(!strcmp(argv[i], "-b")) {
 460                         bottom = True;
 461                 }
 462                 else if(!strcmp(argv[i], "-fn")) {
 463                         if(++i < argc) font = argv[i];
 464                 }
 465                 else if(!strcmp(argv[i], "-nb")) {
 466                         if(++i < argc) normbg = argv[i];
 467                 }
 468                 else if(!strcmp(argv[i], "-nf")) {
 469                         if(++i < argc) normfg = argv[i];
 470                 }
 471                 else if(!strcmp(argv[i], "-p")) {
 472                         if(++i < argc) prompt = argv[i];
 473                 }
 474                 else if(!strcmp(argv[i], "-sb")) {
 475                         if(++i < argc) selbg = argv[i];
 476                 }
 477                 else if(!strcmp(argv[i], "-sf")) {
 478                         if(++i < argc) selfg = argv[i];
 479                 }
 480                 else if(!strcmp(argv[i], "-v"))
 481                         eprint("dmenu-"VERSION", © 2006-2007 Anselm R. Garbe, Sander van Dijk\n");
 482                 else
 483                         usage();
 484         setlocale(LC_CTYPE, "");
 485         dpy = XOpenDisplay(0);
 486         if(!dpy)
 487                 eprint("dmenu: cannot open display\n");
 488         screen = DefaultScreen(dpy);
 489         root = RootWindow(dpy, screen);
 490         if(isatty(STDIN_FILENO)) {
 491                 maxname = readstdin();
 492                 running = grabkeyboard();
 493         }
 494         else { /* prevent keypress loss */
 495                 running = grabkeyboard();
 496                 maxname = readstdin();
 497         }
 498         /* init modifier map */
 499         modmap = XGetModifierMapping(dpy);
 500         for (i = 0; i < 8; i++) {
 501                 for (j = 0; j < modmap->max_keypermod; j++) {
 502                         if(modmap->modifiermap[i * modmap->max_keypermod + j]
 503                         == XKeysymToKeycode(dpy, XK_Num_Lock))
 504                                 numlockmask = (1 << i);
 505                 }
 506         }
 507         XFreeModifiermap(modmap);
 508         /* style */
 509         dc.norm[ColBG] = initcolor(normbg);
 510         dc.norm[ColFG] = initcolor(normfg);
 511         dc.sel[ColBG] = initcolor(selbg);
 512         dc.sel[ColFG] = initcolor(selfg);
 513         initfont(font);
 514         /* menu window */
 515         wa.override_redirect = 1;
 516         wa.background_pixmap = ParentRelative;
 517         wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask;
 518         mw = DisplayWidth(dpy, screen);
 519         mh = dc.font.height + 2;
 520         win = XCreateWindow(dpy, root, 0,
 521                         bottom ? DisplayHeight(dpy, screen) - mh : 0, mw, mh, 0,
 522                         DefaultDepth(dpy, screen), CopyFromParent,
 523                         DefaultVisual(dpy, screen),
 524                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 525         /* pixmap */
 526         dc.drawable = XCreatePixmap(dpy, root, mw, mh, DefaultDepth(dpy, screen));
 527         dc.gc = XCreateGC(dpy, root, 0, 0);
 528         XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
 529         if(!dc.font.set)
 530                 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
 531         if(maxname)
 532                 cmdw = textw(maxname);
 533         if(cmdw > mw / 3)
 534                 cmdw = mw / 3;
 535         if(prompt)
 536                 promptw = textw(prompt);
 537         if(promptw > mw / 5)
 538                 promptw = mw / 5;
 539         text[0] = 0;
 540         match(text);
 541         XMapRaised(dpy, win);
 542         drawmenu();
 543         XSync(dpy, False);
 544
 545         /* main event loop */
 546         while(running && !XNextEvent(dpy, &ev))
 547                 switch (ev.type) {
 548                 default:        /* ignore all crap */
 549                         break;
 550                 case KeyPress:
 551                         kpress(&ev.xkey);
 552                         break;
 553                 case Expose:
 554                         if(ev.xexpose.count == 0)
 555                                 drawmenu();
 556                         break;
 557                 }
 558
 559         /* cleanup */
 560         while(allitems) {
 561                 itm = allitems->next;
 562                 free(allitems->text);
 563                 free(allitems);
 564                 allitems = itm;
 565         }
 566         if(dc.font.set)
 567                 XFreeFontSet(dpy, dc.font.set);
 568         else
 569                 XFreeFont(dpy, dc.font.xfont);
 570         XFreePixmap(dpy, dc.drawable);
 571         XFreeGC(dpy, dc.gc);
 572         XDestroyWindow(dpy, win);
 573         XUngrabKeyboard(dpy, CurrentTime);
 574         XCloseDisplay(dpy);
 575         return ret;
 576 }