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 lines = 0;
  58 static unsigned int numlockmask = 0;
  59 static Bool running = True;
  60 static Item *allitems = NULL;  /* first of all items */
  61 static Item *item = NULL;      /* first of pattern matching items */
  62 static Item *sel = NULL;
  63 static Item *next = NULL;
  64 static Item *prev = NULL;
  65 static Item *curr = NULL;
  66 static Window win;
  67 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
  68 static char *(*fstrstr)(const char *, const char *) = strstr;
  69 static void (*calcoffsets)(void) = calcoffsetsh;
  70
  71 Display *dpy;
  72 DC dc;
  73 int screen;
  74 unsigned int mw, mh;
  75 Window parent;
  76
  77 void
  78 appenditem(Item *i, Item **list, Item **last) {
  79         if(!(*last))
  80                 *list = i;
  81         else
  82                 (*last)->right = i;
  83         i->left = *last;
  84         i->right = NULL;
  85         *last = i;
  86 }
  87
  88 void
  89 calcoffsetsh(void) {
  90         unsigned int w;
  91
  92         if(!curr)
  93                 return;
  94         w = promptw + cmdw + 2 * spaceitem;
  95         for(next = curr; next && w < mw; next=next->right)
  96                 w += MIN(textw(next->text), mw / 3);
  97         w = promptw + cmdw + 2 * spaceitem;
  98         for(prev = curr; prev && prev->left && w < mw; prev=prev->left)
  99                 w += MIN(textw(prev->left->text), mw / 3);
 100 }
 101
 102 void
 103 calcoffsetsv(void) {
 104         unsigned int h;
 105
 106         if(!curr)
 107                 return;
 108         h = (dc.font.height + 2) * lines;
 109         for(next = curr; next && h > 0; next = next->right)
 110                 h -= dc.font.height + 2;
 111         h = (dc.font.height + 2) * lines;
 112         for(prev = curr; prev && prev->left && h > 0; prev = prev->left)
 113                 h -= dc.font.height + 2;
 114 }
 115
 116 char *
 117 cistrstr(const char *s, const char *sub) {
 118         int c, csub;
 119         unsigned int len;
 120
 121         if(!sub)
 122                 return (char *)s;
 123         if((c = tolower(*sub++)) != '\0') {
 124                 len = strlen(sub);
 125                 do {
 126                         do {
 127                                 if((csub = *s++) == '\0')
 128                                         return NULL;
 129                         }
 130                         while(tolower(csub) != c);
 131                 }
 132                 while(strncasecmp(s, sub, len) != 0);
 133                 s--;
 134         }
 135         return (char *)s;
 136 }
 137
 138 void
 139 cleanup(void) {
 140         Item *itm;
 141
 142         while(allitems) {
 143                 itm = allitems->next;
 144                 free(allitems->text);
 145                 free(allitems);
 146                 allitems = itm;
 147         }
 148         drawcleanup();
 149         XDestroyWindow(dpy, win);
 150         XUngrabKeyboard(dpy, CurrentTime);
 151 }
 152
 153 void
 154 drawmenu(void) {
 155         dc.x = 0;
 156         dc.y = 0;
 157         dc.w = mw;
 158         dc.h = mh;
 159         drawtext(NULL, dc.norm);
 160         /* print prompt? */
 161         if(prompt) {
 162                 dc.w = promptw;
 163                 drawtext(prompt, dc.sel);
 164                 dc.x += dc.w;
 165         }
 166         dc.w = mw - dc.x;
 167         /* print command */
 168         if(cmdw && item && lines == 0)
 169                 dc.w = cmdw;
 170         drawtext(*text ? text : NULL, dc.norm);
 171         if(curr) {
 172                 if(lines > 0)
 173                         drawmenuv();
 174                 else
 175                         drawmenuh();
 176         }
 177         XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
 178         XFlush(dpy);
 179 }
 180
 181 void
 182 drawmenuh(void) {
 183         Item *i;
 184
 185         dc.x += cmdw;
 186         dc.w = spaceitem;
 187         drawtext(curr->left ? "<" : NULL, dc.norm);
 188         dc.x += dc.w;
 189         for(i = curr; i != next; i=i->right) {
 190                 dc.w = MIN(textw(i->text), mw / 3);
 191                 drawtext(i->text, (sel == i) ? dc.sel : dc.norm);
 192                 dc.x += dc.w;
 193         }
 194         dc.w = spaceitem;
 195         dc.x = mw - dc.w;
 196         drawtext(next ? ">" : NULL, dc.norm);
 197 }
 198
 199 void
 200 drawmenuv(void) {
 201         Item *i;
 202
 203         dc.w = mw - dc.x;
 204         dc.h = dc.font.height + 2;
 205         dc.y = dc.h;
 206         for(i = curr; i != next; i=i->right) {
 207                 drawtext(i->text, (sel == i) ? dc.sel : dc.norm);
 208                 dc.y += dc.h;
 209         }
 210         dc.h = mh - dc.y;
 211         drawtext(NULL, dc.norm);
 212 }
 213
 214 Bool
 215 grabkeyboard(void) {
 216         unsigned int len;
 217
 218         for(len = 1000; len; len--) {
 219                 if(XGrabKeyboard(dpy, parent, True, GrabModeAsync, GrabModeAsync, CurrentTime)
 220                 == GrabSuccess)
 221                         break;
 222                 usleep(1000);
 223         }
 224         return len > 0;
 225 }
 226
 227 void
 228 kpress(XKeyEvent * e) {
 229         char buf[sizeof text];
 230         int num;
 231         unsigned int i, len;
 232         KeySym ksym;
 233
 234         len = strlen(text);
 235         num = XLookupString(e, buf, sizeof buf, &ksym, NULL);
 236         if(ksym == XK_KP_Enter)
 237                 ksym = XK_Return;
 238         else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
 239                 ksym = (ksym - XK_KP_0) + XK_0;
 240         else if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
 241         || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
 242         || IsPrivateKeypadKey(ksym))
 243                 return;
 244         /* first check if a control mask is omitted */
 245         if(e->state & ControlMask) {
 246                 switch(tolower(ksym)) {
 247                 default:
 248                         return;
 249                 case XK_a:
 250                         ksym = XK_Home;
 251                         break;
 252                 case XK_b:
 253                         ksym = XK_Left;
 254                         break;
 255                 case XK_c:
 256                         ksym = XK_Escape;
 257                         break;
 258                 case XK_e:
 259                         ksym = XK_End;
 260                         break;
 261                 case XK_f:
 262                         ksym = XK_Right;
 263                         break;
 264                 case XK_h:
 265                         ksym = XK_BackSpace;
 266                         break;
 267                 case XK_i:
 268                         ksym = XK_Tab;
 269                         break;
 270                 case XK_j:
 271                         ksym = XK_Return;
 272                         break;
 273                 case XK_n:
 274                         ksym = XK_Down;
 275                         break;
 276                 case XK_p:
 277                         ksym = XK_Up;
 278                         break;
 279                 case XK_u:
 280                         text[0] = '\0';
 281                         match(text);
 282                         break;
 283                 case XK_w:
 284                         if(len == 0)
 285                                 return;
 286                         i = len;
 287                         while(i-- > 0 && text[i] == ' ');
 288                         while(i-- > 0 && text[i] != ' ');
 289                         text[++i] = '\0';
 290                         match(text);
 291                         break;
 292                 case XK_x:
 293                         execlp("dinput", "dinput", text, NULL); /* todo: argv */
 294                         eprint("dmenu: cannot exec dinput:");
 295                         break;
 296                 }
 297         }
 298         switch(ksym) {
 299         default:
 300                 num = MIN(num, sizeof text);
 301                 if(num && !iscntrl((int) buf[0])) {
 302                         memcpy(text + len, buf, num + 1);
 303                         len += num;
 304                         match(text);
 305                 }
 306                 break;
 307         case XK_BackSpace:
 308                 if(len == 0)
 309                         return;
 310                 for(i = 1; len - i > 0 && !IS_UTF8_1ST_CHAR(text[len - i]); i++);
 311                 len -= i;
 312                 text[len] = '\0';
 313                 match(text);
 314                 break;
 315         case XK_End:
 316                 while(next) {
 317                         sel = curr = next;
 318                         calcoffsets();
 319                 }
 320                 while(sel && sel->right)
 321                         sel = sel->right;
 322                 break;
 323         case XK_Escape:
 324                 ret = 1;
 325                 running = False;
 326                 return;
 327         case XK_Home:
 328                 sel = curr = item;
 329                 calcoffsets();
 330                 break;
 331         case XK_Left:
 332         case XK_Up:
 333                 if(!sel || !sel->left)
 334                         return;
 335                 sel = sel->left;
 336                 if(sel->right == curr) {
 337                         curr = prev;
 338                         calcoffsets();
 339                 }
 340                 break;
 341         case XK_Next:
 342                 if(!next)
 343                         return;
 344                 sel = curr = next;
 345                 calcoffsets();
 346                 break;
 347         case XK_Prior:
 348                 if(!prev)
 349                         return;
 350                 sel = curr = prev;
 351                 calcoffsets();
 352                 break;
 353         case XK_Return:
 354                 if((e->state & ShiftMask) || !sel)
 355                         fprintf(stdout, "%s", text);
 356                 else
 357                         fprintf(stdout, "%s", sel->text);
 358                 fflush(stdout);
 359                 running = False;
 360                 return;
 361         case XK_Right:
 362         case XK_Down:
 363                 if(!sel || !sel->right)
 364                         return;
 365                 sel = sel->right;
 366                 if(sel == next) {
 367                         curr = next;
 368                         calcoffsets();
 369                 }
 370                 break;
 371         case XK_Tab:
 372                 if(!sel)
 373                         return;
 374                 strncpy(text, sel->text, sizeof text);
 375                 match(text);
 376                 break;
 377         }
 378         drawmenu();
 379 }
 380
 381 void
 382 match(char *pattern) {
 383         unsigned int plen;
 384         Item *i, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
 385
 386         if(!pattern)
 387                 return;
 388         plen = strlen(pattern);
 389         item = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
 390         for(i = allitems; i; i = i->next)
 391                 if(!fstrncmp(pattern, i->text, plen + 1))
 392                         appenditem(i, &lexact, &exactend);
 393                 else if(!fstrncmp(pattern, i->text, plen))
 394                         appenditem(i, &lprefix, &prefixend);
 395                 else if(fstrstr(i->text, pattern))
 396                         appenditem(i, &lsubstr, &substrend);
 397         if(lexact) {
 398                 item = lexact;
 399                 itemend = exactend;
 400         }
 401         if(lprefix) {
 402                 if(itemend) {
 403                         itemend->right = lprefix;
 404                         lprefix->left = itemend;
 405                 }
 406                 else
 407                         item = lprefix;
 408                 itemend = prefixend;
 409         }
 410         if(lsubstr) {
 411                 if(itemend) {
 412                         itemend->right = lsubstr;
 413                         lsubstr->left = itemend;
 414                 }
 415                 else
 416                         item = lsubstr;
 417         }
 418         curr = prev = next = sel = item;
 419         calcoffsets();
 420 }
 421
 422 void
 423 readstdin(void) {
 424         char *p, buf[sizeof text];
 425         unsigned int len = 0, max = 0;
 426         Item *i, *new;
 427
 428         i = NULL;
 429         while(fgets(buf, sizeof buf, stdin)) {
 430                 len = strlen(buf);
 431                 if(buf[len-1] == '\n')
 432                         buf[--len] = '\0';
 433                 if(!(p = strdup(buf)))
 434                         eprint("dmenu: cannot strdup %u bytes\n", len);
 435                 if((max = MAX(max, len)) == len)
 436                         maxname = p;
 437                 if(!(new = malloc(sizeof *new)))
 438                         eprint("dmenu: cannot malloc %u bytes\n", sizeof *new);
 439                 new->next = new->left = new->right = NULL;
 440                 new->text = p;
 441                 if(!i)
 442                         allitems = new;
 443                 else
 444                         i->next = new;
 445                 i = new;
 446         }
 447 }
 448
 449 void
 450 run(void) {
 451         XEvent ev;
 452
 453         /* main event loop */
 454         while(running && !XNextEvent(dpy, &ev))
 455                 switch (ev.type) {
 456                 case KeyPress:
 457                         kpress(&ev.xkey);
 458                         break;
 459                 case Expose:
 460                         if(ev.xexpose.count == 0)
 461                                 drawmenu();
 462                         break;
 463                 case VisibilityNotify:
 464                         if (ev.xvisibility.state != VisibilityUnobscured)
 465                                 XRaiseWindow(dpy, win);
 466                         break;
 467                 }
 468 }
 469
 470 void
 471 setup(Bool topbar) {
 472         int i, j, x, y;
 473 #if XINERAMA
 474         int n;
 475         XineramaScreenInfo *info = NULL;
 476 #endif
 477         XModifierKeymap *modmap;
 478         XSetWindowAttributes wa;
 479         XWindowAttributes pwa;
 480
 481         /* init modifier map */
 482         modmap = XGetModifierMapping(dpy);
 483         for(i = 0; i < 8; i++)
 484                 for(j = 0; j < modmap->max_keypermod; j++) {
 485                         if(modmap->modifiermap[i * modmap->max_keypermod + j]
 486                         == XKeysymToKeycode(dpy, XK_Num_Lock))
 487                                 numlockmask = (1 << i);
 488                 }
 489         XFreeModifiermap(modmap);
 490
 491         initfont(font);
 492
 493         /* menu window */
 494         wa.override_redirect = True;
 495         wa.background_pixmap = ParentRelative;
 496         wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask | VisibilityChangeMask;
 497
 498         /* menu window geometry */
 499         mh = (dc.font.height + 2) * (lines + 1);
 500 #if XINERAMA
 501         if(parent == RootWindow(dpy, screen) && XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
 502                 i = 0;
 503                 if(n > 1) {
 504                         int di;
 505                         unsigned int dui;
 506                         Window dummy;
 507                         if(XQueryPointer(dpy, parent, &dummy, &dummy, &x, &y, &di, &di, &dui))
 508                                 for(i = 0; i < n; i++)
 509                                         if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
 510                                                 break;
 511                 }
 512                 x = info[i].x_org;
 513                 y = topbar ? info[i].y_org : info[i].y_org + info[i].height - mh;
 514                 mw = info[i].width;
 515                 XFree(info);
 516         }
 517         else
 518 #endif
 519         {
 520                 XGetWindowAttributes(dpy, parent, &pwa);
 521                 x = 0;
 522                 y = topbar ? 0 : pwa.height - mh;
 523                 mw = pwa.width;
 524         }
 525
 526         win = XCreateWindow(dpy, parent, x, y, mw, mh, 0,
 527                         DefaultDepth(dpy, screen), CopyFromParent,
 528                         DefaultVisual(dpy, screen),
 529                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 530
 531         drawsetup();
 532         if(maxname)
 533                 cmdw = MIN(textw(maxname), mw / 3);
 534         if(prompt)
 535                 promptw = MIN(textw(prompt), mw / 5);
 536         text[0] = '\0';
 537         match(text);
 538         XMapRaised(dpy, win);
 539 }
 540
 541 int
 542 main(int argc, char *argv[]) {
 543         unsigned int i;
 544         Bool topbar = True;
 545
 546         /* command line args */
 547         for(i = 1; i < argc; i++)
 548                 if(!strcmp(argv[i], "-i")) {
 549                         fstrncmp = strncasecmp;
 550                         fstrstr = cistrstr;
 551                 }
 552                 else if(!strcmp(argv[i], "-b"))
 553                         topbar = False;
 554                 else if(!strcmp(argv[i], "-e")) {
 555                         if(++i < argc) parent = atoi(argv[i]);
 556                 }
 557                 else if(!strcmp(argv[i], "-l")) {
 558                         if(++i < argc) lines = atoi(argv[i]);
 559                         if(lines > 0)
 560                                 calcoffsets = calcoffsetsv;
 561                 }
 562                 else if(!strcmp(argv[i], "-fn")) {
 563                         if(++i < argc) font = argv[i];
 564                 }
 565                 else if(!strcmp(argv[i], "-nb")) {
 566                         if(++i < argc) normbgcolor = argv[i];
 567                 }
 568                 else if(!strcmp(argv[i], "-nf")) {
 569                         if(++i < argc) normfgcolor = argv[i];
 570                 }
 571                 else if(!strcmp(argv[i], "-p")) {
 572                         if(++i < argc) prompt = argv[i];
 573                 }
 574                 else if(!strcmp(argv[i], "-sb")) {
 575                         if(++i < argc) selbgcolor = argv[i];
 576                 }
 577                 else if(!strcmp(argv[i], "-sf")) {
 578                         if(++i < argc) selfgcolor = argv[i];
 579                 }
 580                 else if(!strcmp(argv[i], "-v"))
 581                         eprint("dmenu-"VERSION", © 2006-2010 dmenu engineers, see LICENSE for details\n");
 582                 else
 583                         eprint("usage: dmenu [-i] [-b] [-e <xid>] [-l <lines>] [-fn <font>] [-nb <color>]\n"
 584                                "             [-nf <color>] [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n");
 585         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 586                 fprintf(stderr, "dmenu: warning: no locale support\n");
 587         if(!(dpy = XOpenDisplay(NULL)))
 588                 eprint("dmenu: cannot open display\n");
 589         screen = DefaultScreen(dpy);
 590         if(!parent)
 591                 parent = RootWindow(dpy, screen);
 592
 593         readstdin();
 594         running = grabkeyboard();
 595
 596         setup(topbar);
 597         drawmenu();
 598         XSync(dpy, False);
 599         run();
 600         cleanup();
 601         XCloseDisplay(dpy);
 602         return ret;
 603 }