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 drawmenu(void);
  38 static void drawmenuh(void);
  39 static void drawmenuv(void);
  40 static Bool grabkeyboard(void);
  41 static void kpress(XKeyEvent * e);
  42 static void match(char *pattern);
  43 static void readstdin(void);
  44 static void run(void);
  45 static void setup(Bool topbar);
  46
  47 #include "config.h"
  48 #include "draw.h"
  49
  50 /* variables */
  51 static char *maxname = NULL;
  52 static char *prompt = NULL;
  53 static char text[4096];
  54 static int cmdw = 0;
  55 static int promptw = 0;
  56 static int ret = 0;
  57 static unsigned int numlockmask = 0;
  58 static Bool running = True;
  59 static Item *allitems = NULL;  /* first of all items */
  60 static Item *item = NULL;      /* first of pattern matching items */
  61 static Item *sel = NULL;
  62 static Item *next = NULL;
  63 static Item *prev = NULL;
  64 static Item *curr = NULL;
  65 static Window win;
  66 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
  67 static char *(*fstrstr)(const char *, const char *) = strstr;
  68 static unsigned int lines = 0;
  69 static void (*calcoffsets)(void) = calcoffsetsh;
  70
  71 void
  72 appenditem(Item *i, Item **list, Item **last) {
  73         if(!(*last))
  74                 *list = i;
  75         else
  76                 (*last)->right = i;
  77         i->left = *last;
  78         i->right = NULL;
  79         *last = i;
  80 }
  81
  82 void
  83 calcoffsetsh(void) {
  84         unsigned int w;
  85
  86         if(!curr)
  87                 return;
  88         w = promptw + cmdw + 2 * spaceitem;
  89         for(next = curr; next && w < mw; next=next->right)
  90                 w += MIN(textw(next->text), mw / 3);
  91         w = promptw + cmdw + 2 * spaceitem;
  92         for(prev = curr; prev && prev->left && w < mw; prev=prev->left)
  93                 w += MIN(textw(prev->left->text), mw / 3);
  94 }
  95
  96 void
  97 calcoffsetsv(void) {
  98         unsigned int h;
  99
 100         if(!curr)
 101                 return;
 102         h = (dc.font.height + 2) * lines;
 103         for(next = curr; next && h > 0; next = next->right)
 104                 h -= dc.font.height + 2;
 105         h = (dc.font.height + 2) * lines;
 106         for(prev = curr; prev && prev->left && h > 0; prev = prev->left)
 107                 h -= dc.font.height + 2;
 108 }
 109
 110 char *
 111 cistrstr(const char *s, const char *sub) {
 112         int c, csub;
 113         unsigned int len;
 114
 115         if(!sub)
 116                 return (char *)s;
 117         if((c = tolower(*sub++)) != '\0') {
 118                 len = strlen(sub);
 119                 do {
 120                         do {
 121                                 if((csub = *s++) == '\0')
 122                                         return NULL;
 123                         }
 124                         while(tolower(csub) != c);
 125                 }
 126                 while(strncasecmp(s, sub, len) != 0);
 127                 s--;
 128         }
 129         return (char *)s;
 130 }
 131
 132 void
 133 cleanup(void) {
 134         drawcleanup();
 135         XDestroyWindow(dpy, win);
 136         XUngrabKeyboard(dpy, CurrentTime);
 137 }
 138
 139 void
 140 drawmenu(void) {
 141         dc.x = 0;
 142         dc.y = 0;
 143         dc.w = mw;
 144         dc.h = mh;
 145         drawtext(NULL, dc.norm);
 146         /* print prompt? */
 147         if(prompt) {
 148                 dc.w = promptw;
 149                 drawtext(prompt, dc.sel);
 150                 dc.x += dc.w;
 151         }
 152         dc.w = mw - dc.x;
 153         /* print command */
 154         if(cmdw && item && lines == 0)
 155                 dc.w = cmdw;
 156         drawtext(*text ? text : NULL, dc.norm);
 157         if(curr) {
 158                 if(lines > 0)
 159                         drawmenuv();
 160                 else
 161                         drawmenuh();
 162         }
 163         XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
 164         XFlush(dpy);
 165 }
 166
 167 void
 168 drawmenuh(void) {
 169         Item *i;
 170
 171         dc.x += cmdw;
 172         dc.w = spaceitem;
 173         drawtext(curr->left ? "<" : NULL, dc.norm);
 174         dc.x += dc.w;
 175         for(i = curr; i != next; i=i->right) {
 176                 dc.w = MIN(textw(i->text), mw / 3);
 177                 drawtext(i->text, (sel == i) ? dc.sel : dc.norm);
 178                 dc.x += dc.w;
 179         }
 180         dc.w = spaceitem;
 181         dc.x = mw - dc.w;
 182         drawtext(next ? ">" : NULL, dc.norm);
 183 }
 184
 185 void
 186 drawmenuv(void) {
 187         Item *i;
 188
 189         dc.w = mw - dc.x;
 190         dc.h = dc.font.height + 2;
 191         dc.y = dc.h;
 192         for(i = curr; i != next; i=i->right) {
 193                 drawtext(i->text, (sel == i) ? dc.sel : dc.norm);
 194                 dc.y += dc.h;
 195         }
 196         dc.h = mh - dc.y;
 197         drawtext(NULL, dc.norm);
 198 }
 199
 200 Bool
 201 grabkeyboard(void) {
 202         unsigned int len;
 203
 204         for(len = 1000; len; len--) {
 205                 if(XGrabKeyboard(dpy, parent, True, GrabModeAsync, GrabModeAsync, CurrentTime)
 206                 == GrabSuccess)
 207                         break;
 208                 usleep(1000);
 209         }
 210         return len > 0;
 211 }
 212
 213 void
 214 kpress(XKeyEvent * e) {
 215         char buf[sizeof text];
 216         int num;
 217         unsigned int i, len;
 218         KeySym ksym;
 219
 220         len = strlen(text);
 221         num = XLookupString(e, buf, sizeof buf, &ksym, NULL);
 222         if(ksym == XK_KP_Enter)
 223                 ksym = XK_Return;
 224         else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
 225                 ksym = (ksym - XK_KP_0) + XK_0;
 226         else if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
 227         || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
 228         || IsPrivateKeypadKey(ksym))
 229                 return;
 230         /* first check if a control mask is omitted */
 231         if(e->state & ControlMask) {
 232                 switch(tolower(ksym)) {
 233                 default:
 234                         return;
 235                 case XK_a:
 236                         ksym = XK_Home;
 237                         break;
 238                 case XK_b:
 239                         ksym = XK_Left;
 240                         break;
 241                 case XK_c:
 242                         ksym = XK_Escape;
 243                         break;
 244                 case XK_e:
 245                         ksym = XK_End;
 246                         break;
 247                 case XK_f:
 248                         ksym = XK_Right;
 249                         break;
 250                 case XK_h:
 251                         ksym = XK_BackSpace;
 252                         break;
 253                 case XK_i:
 254                         ksym = XK_Tab;
 255                         break;
 256                 case XK_j:
 257                         ksym = XK_Return;
 258                         break;
 259                 case XK_n:
 260                         ksym = XK_Down;
 261                         break;
 262                 case XK_p:
 263                         ksym = XK_Up;
 264                         break;
 265                 case XK_u:
 266                         text[0] = '\0';
 267                         match(text);
 268                         break;
 269                 case XK_w:
 270                         if(len == 0)
 271                                 return;
 272                         i = len;
 273                         while(i-- > 0 && text[i] == ' ');
 274                         while(i-- > 0 && text[i] != ' ');
 275                         text[++i] = '\0';
 276                         match(text);
 277                         break;
 278                 case XK_x:
 279                         execlp("dinput", "dinput", text, NULL); /* todo: argv */
 280                         eprint("dmenu: cannot exec dinput:");
 281                         break;
 282                 }
 283         }
 284         switch(ksym) {
 285         default:
 286                 num = MIN(num, sizeof text);
 287                 if(num && !iscntrl((int) buf[0])) {
 288                         memcpy(text + len, buf, num + 1);
 289                         len += num;
 290                         match(text);
 291                 }
 292                 break;
 293         case XK_BackSpace:
 294                 if(len == 0)
 295                         return;
 296                 for(i = 1; len - i > 0 && !IS_UTF8_1ST_CHAR(text[len - i]); i++);
 297                 len -= i;
 298                 text[len] = '\0';
 299                 match(text);
 300                 break;
 301         case XK_End:
 302                 while(next) {
 303                         sel = curr = next;
 304                         calcoffsets();
 305                 }
 306                 while(sel && sel->right)
 307                         sel = sel->right;
 308                 break;
 309         case XK_Escape:
 310                 ret = 1;
 311                 running = False;
 312                 return;
 313         case XK_Home:
 314                 sel = curr = item;
 315                 calcoffsets();
 316                 break;
 317         case XK_Left:
 318         case XK_Up:
 319                 if(!sel || !sel->left)
 320                         return;
 321                 sel = sel->left;
 322                 if(sel->right == curr) {
 323                         curr = prev;
 324                         calcoffsets();
 325                 }
 326                 break;
 327         case XK_Next:
 328                 if(!next)
 329                         return;
 330                 sel = curr = next;
 331                 calcoffsets();
 332                 break;
 333         case XK_Prior:
 334                 if(!prev)
 335                         return;
 336                 sel = curr = prev;
 337                 calcoffsets();
 338                 break;
 339         case XK_Return:
 340                 if((e->state & ShiftMask) || !sel)
 341                         fprintf(stdout, "%s", text);
 342                 else
 343                         fprintf(stdout, "%s", sel->text);
 344                 fflush(stdout);
 345                 running = False;
 346                 return;
 347         case XK_Right:
 348         case XK_Down:
 349                 if(!sel || !sel->right)
 350                         return;
 351                 sel = sel->right;
 352                 if(sel == next) {
 353                         curr = next;
 354                         calcoffsets();
 355                 }
 356                 break;
 357         case XK_Tab:
 358                 if(!sel)
 359                         return;
 360                 strncpy(text, sel->text, sizeof text);
 361                 match(text);
 362                 break;
 363         }
 364         drawmenu();
 365 }
 366
 367 void
 368 match(char *pattern) {
 369         unsigned int plen;
 370         Item *i, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
 371
 372         if(!pattern)
 373                 return;
 374         plen = strlen(pattern);
 375         item = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
 376         for(i = allitems; i; i = i->next)
 377                 if(!fstrncmp(pattern, i->text, plen + 1))
 378                         appenditem(i, &lexact, &exactend);
 379                 else if(!fstrncmp(pattern, i->text, plen))
 380                         appenditem(i, &lprefix, &prefixend);
 381                 else if(fstrstr(i->text, pattern))
 382                         appenditem(i, &lsubstr, &substrend);
 383         if(lexact) {
 384                 item = lexact;
 385                 itemend = exactend;
 386         }
 387         if(lprefix) {
 388                 if(itemend) {
 389                         itemend->right = lprefix;
 390                         lprefix->left = itemend;
 391                 }
 392                 else
 393                         item = lprefix;
 394                 itemend = prefixend;
 395         }
 396         if(lsubstr) {
 397                 if(itemend) {
 398                         itemend->right = lsubstr;
 399                         lsubstr->left = itemend;
 400                 }
 401                 else
 402                         item = lsubstr;
 403         }
 404         curr = prev = next = sel = item;
 405         calcoffsets();
 406 }
 407
 408 void
 409 readstdin(void) {
 410         char *p, buf[sizeof text];
 411         unsigned int len = 0, max = 0;
 412         Item *i, *new;
 413
 414         i = NULL;
 415         while(fgets(buf, sizeof buf, stdin)) {
 416                 len = strlen(buf);
 417                 if(buf[len-1] == '\n')
 418                         buf[--len] = '\0';
 419                 if(!(p = strdup(buf)))
 420                         eprint("dmenu: cannot strdup %u bytes\n", len);
 421                 if((max = MAX(max, len)) == len)
 422                         maxname = p;
 423                 if(!(new = malloc(sizeof *new)))
 424                         eprint("dmenu: cannot malloc %u bytes\n", sizeof *new);
 425                 new->next = new->left = new->right = NULL;
 426                 new->text = p;
 427                 if(!i)
 428                         allitems = new;
 429                 else
 430                         i->next = new;
 431                 i = new;
 432         }
 433 }
 434
 435 void
 436 run(void) {
 437         XEvent ev;
 438
 439         /* main event loop */
 440         while(running && !XNextEvent(dpy, &ev))
 441                 switch (ev.type) {
 442                 case KeyPress:
 443                         kpress(&ev.xkey);
 444                         break;
 445                 case Expose:
 446                         if(ev.xexpose.count == 0)
 447                                 drawmenu();
 448                         break;
 449                 case VisibilityNotify:
 450                         if (ev.xvisibility.state != VisibilityUnobscured)
 451                                 XRaiseWindow(dpy, win);
 452                         break;
 453                 }
 454 }
 455
 456 void
 457 setup(Bool topbar) {
 458         int i, j, x, y;
 459 #if XINERAMA
 460         int n;
 461         XineramaScreenInfo *info = NULL;
 462 #endif
 463         XModifierKeymap *modmap;
 464         XSetWindowAttributes wa;
 465         XWindowAttributes pwa;
 466
 467         /* init modifier map */
 468         modmap = XGetModifierMapping(dpy);
 469         for(i = 0; i < 8; i++)
 470                 for(j = 0; j < modmap->max_keypermod; j++) {
 471                         if(modmap->modifiermap[i * modmap->max_keypermod + j]
 472                         == XKeysymToKeycode(dpy, XK_Num_Lock))
 473                                 numlockmask = (1 << i);
 474                 }
 475         XFreeModifiermap(modmap);
 476
 477         initfont(font);
 478
 479         /* menu window */
 480         wa.override_redirect = True;
 481         wa.background_pixmap = ParentRelative;
 482         wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask | VisibilityChangeMask;
 483
 484         /* menu window geometry */
 485         mh = (dc.font.height + 2) * (lines + 1);
 486 #if XINERAMA
 487         if(parent == RootWindow(dpy, screen) && XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
 488                 i = 0;
 489                 if(n > 1) {
 490                         int di;
 491                         unsigned int dui;
 492                         Window dummy;
 493                         if(XQueryPointer(dpy, parent, &dummy, &dummy, &x, &y, &di, &di, &dui))
 494                                 for(i = 0; i < n; i++)
 495                                         if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
 496                                                 break;
 497                 }
 498                 x = info[i].x_org;
 499                 y = topbar ? info[i].y_org : info[i].y_org + info[i].height - mh;
 500                 mw = info[i].width;
 501                 XFree(info);
 502         }
 503         else
 504 #endif
 505         {
 506                 XGetWindowAttributes(dpy, parent, &pwa);
 507                 x = 0;
 508                 y = topbar ? 0 : pwa.height - mh;
 509                 mw = pwa.width;
 510         }
 511
 512         win = XCreateWindow(dpy, parent, x, y, mw, mh, 0,
 513                         DefaultDepth(dpy, screen), CopyFromParent,
 514                         DefaultVisual(dpy, screen),
 515                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 516
 517         drawsetup();
 518         if(maxname)
 519                 cmdw = MIN(textw(maxname), mw / 3);
 520         if(prompt)
 521                 promptw = MIN(textw(prompt), mw / 5);
 522         text[0] = '\0';
 523         match(text);
 524         XMapRaised(dpy, win);
 525 }
 526
 527 int
 528 main(int argc, char *argv[]) {
 529         unsigned int i;
 530         Bool topbar = True;
 531
 532         /* command line args */
 533         for(i = 1; i < argc; i++)
 534                 if(!strcmp(argv[i], "-i")) {
 535                         fstrncmp = strncasecmp;
 536                         fstrstr = cistrstr;
 537                 }
 538                 else if(!strcmp(argv[i], "-b"))
 539                         topbar = False;
 540                 else if(!strcmp(argv[i], "-e")) {
 541                         if(++i < argc) parent = atoi(argv[i]);
 542                 }
 543                 else if(!strcmp(argv[i], "-l")) {
 544                         if(++i < argc) lines = atoi(argv[i]);
 545                         if(lines > 0)
 546                                 calcoffsets = calcoffsetsv;
 547                 }
 548                 else if(!strcmp(argv[i], "-fn")) {
 549                         if(++i < argc) font = argv[i];
 550                 }
 551                 else if(!strcmp(argv[i], "-nb")) {
 552                         if(++i < argc) normbgcolor = argv[i];
 553                 }
 554                 else if(!strcmp(argv[i], "-nf")) {
 555                         if(++i < argc) normfgcolor = argv[i];
 556                 }
 557                 else if(!strcmp(argv[i], "-p")) {
 558                         if(++i < argc) prompt = argv[i];
 559                 }
 560                 else if(!strcmp(argv[i], "-sb")) {
 561                         if(++i < argc) selbgcolor = argv[i];
 562                 }
 563                 else if(!strcmp(argv[i], "-sf")) {
 564                         if(++i < argc) selfgcolor = argv[i];
 565                 }
 566                 else if(!strcmp(argv[i], "-v"))
 567                         eprint("dmenu-"VERSION", © 2006-2010 dmenu engineers, see LICENSE for details\n");
 568                 else
 569                         eprint("usage: dmenu [-i] [-b] [-e <xid>] [-l <lines>] [-fn <font>] [-nb <color>]\n"
 570                                "             [-nf <color>] [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n");
 571         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 572                 fprintf(stderr, "dmenu: warning: no locale support\n");
 573         if(!(dpy = XOpenDisplay(NULL)))
 574                 eprint("dmenu: cannot open display\n");
 575         screen = DefaultScreen(dpy);
 576         if(!parent)
 577                 parent = RootWindow(dpy, screen);
 578
 579         readstdin();
 580         running = grabkeyboard();
 581
 582         setup(topbar);
 583         drawmenu();
 584         XSync(dpy, False);
 585         run();
 586         cleanup();
 587         XCloseDisplay(dpy);
 588         return ret;
 589 }