dmenu

dynamic menu
git clone git://git.suckless.org/dmenu
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dmenu.c (19487B)


      1 /* See LICENSE file for copyright and license details. */
      2 #include <ctype.h>
      3 #include <locale.h>
      4 #include <stdio.h>
      5 #include <stdlib.h>
      6 #include <string.h>
      7 #include <strings.h>
      8 #include <time.h>
      9 #include <unistd.h>
     10 
     11 #include <X11/Xlib.h>
     12 #include <X11/Xatom.h>
     13 #include <X11/Xutil.h>
     14 #ifdef XINERAMA
     15 #include <X11/extensions/Xinerama.h>
     16 #endif
     17 #include <X11/Xft/Xft.h>
     18 
     19 #include "drw.h"
     20 #include "util.h"
     21 
     22 /* macros */
     23 #define INTERSECT(x,y,w,h,r)  (MAX(0, MIN((x)+(w),(r).x_org+(r).width)  - MAX((x),(r).x_org)) \
     24                              * MAX(0, MIN((y)+(h),(r).y_org+(r).height) - MAX((y),(r).y_org)))
     25 #define TEXTW(X)              (drw_fontset_getwidth(drw, (X)) + lrpad)
     26 
     27 /* enums */
     28 enum { SchemeNorm, SchemeSel, SchemeOut, SchemeLast }; /* color schemes */
     29 
     30 struct item {
     31 	char *text;
     32 	struct item *left, *right;
     33 	int out;
     34 };
     35 
     36 static char text[BUFSIZ] = "";
     37 static char *embed;
     38 static int bh, mw, mh;
     39 static int inputw = 0, promptw;
     40 static int lrpad; /* sum of left and right padding */
     41 static size_t cursor;
     42 static struct item *items = NULL;
     43 static struct item *matches, *matchend;
     44 static struct item *prev, *curr, *next, *sel;
     45 static int mon = -1, screen;
     46 
     47 static Atom clip, utf8;
     48 static Display *dpy;
     49 static Window root, parentwin, win;
     50 static XIC xic;
     51 
     52 static Drw *drw;
     53 static Clr *scheme[SchemeLast];
     54 
     55 #include "config.h"
     56 
     57 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
     58 static char *(*fstrstr)(const char *, const char *) = strstr;
     59 
     60 static unsigned int
     61 textw_clamp(const char *str, unsigned int n)
     62 {
     63 	unsigned int w = drw_fontset_getwidth_clamp(drw, str, n) + lrpad;
     64 	return MIN(w, n);
     65 }
     66 
     67 static void
     68 appenditem(struct item *item, struct item **list, struct item **last)
     69 {
     70 	if (*last)
     71 		(*last)->right = item;
     72 	else
     73 		*list = item;
     74 
     75 	item->left = *last;
     76 	item->right = NULL;
     77 	*last = item;
     78 }
     79 
     80 static void
     81 calcoffsets(void)
     82 {
     83 	int i, n;
     84 
     85 	if (lines > 0)
     86 		n = lines * bh;
     87 	else
     88 		n = mw - (promptw + inputw + TEXTW("<") + TEXTW(">"));
     89 	/* calculate which items will begin the next page and previous page */
     90 	for (i = 0, next = curr; next; next = next->right)
     91 		if ((i += (lines > 0) ? bh : textw_clamp(next->text, n)) > n)
     92 			break;
     93 	for (i = 0, prev = curr; prev && prev->left; prev = prev->left)
     94 		if ((i += (lines > 0) ? bh : textw_clamp(prev->left->text, n)) > n)
     95 			break;
     96 }
     97 
     98 static void
     99 cleanup(void)
    100 {
    101 	size_t i;
    102 
    103 	XUngrabKey(dpy, AnyKey, AnyModifier, root);
    104 	for (i = 0; i < SchemeLast; i++)
    105 		free(scheme[i]);
    106 	for (i = 0; items && items[i].text; ++i)
    107 		free(items[i].text);
    108 	free(items);
    109 	drw_free(drw);
    110 	XSync(dpy, False);
    111 	XCloseDisplay(dpy);
    112 }
    113 
    114 static char *
    115 cistrstr(const char *h, const char *n)
    116 {
    117 	size_t i;
    118 
    119 	if (!n[0])
    120 		return (char *)h;
    121 
    122 	for (; *h; ++h) {
    123 		for (i = 0; n[i] && tolower((unsigned char)n[i]) ==
    124 		            tolower((unsigned char)h[i]); ++i)
    125 			;
    126 		if (n[i] == '\0')
    127 			return (char *)h;
    128 	}
    129 	return NULL;
    130 }
    131 
    132 static int
    133 drawitem(struct item *item, int x, int y, int w)
    134 {
    135 	if (item == sel)
    136 		drw_setscheme(drw, scheme[SchemeSel]);
    137 	else if (item->out)
    138 		drw_setscheme(drw, scheme[SchemeOut]);
    139 	else
    140 		drw_setscheme(drw, scheme[SchemeNorm]);
    141 
    142 	return drw_text(drw, x, y, w, bh, lrpad / 2, item->text, 0);
    143 }
    144 
    145 static void
    146 drawmenu(void)
    147 {
    148 	unsigned int curpos;
    149 	struct item *item;
    150 	int x = 0, y = 0, w;
    151 
    152 	drw_setscheme(drw, scheme[SchemeNorm]);
    153 	drw_rect(drw, 0, 0, mw, mh, 1, 1);
    154 
    155 	if (prompt && *prompt) {
    156 		drw_setscheme(drw, scheme[SchemeSel]);
    157 		x = drw_text(drw, x, 0, promptw, bh, lrpad / 2, prompt, 0);
    158 	}
    159 	/* draw input field */
    160 	w = (lines > 0 || !matches) ? mw - x : inputw;
    161 	drw_setscheme(drw, scheme[SchemeNorm]);
    162 	drw_text(drw, x, 0, w, bh, lrpad / 2, text, 0);
    163 
    164 	curpos = TEXTW(text) - TEXTW(&text[cursor]);
    165 	if ((curpos += lrpad / 2 - 1) < w) {
    166 		drw_setscheme(drw, scheme[SchemeNorm]);
    167 		drw_rect(drw, x + curpos, 2, 2, bh - 4, 1, 0);
    168 	}
    169 
    170 	if (lines > 0) {
    171 		/* draw vertical list */
    172 		for (item = curr; item != next; item = item->right)
    173 			drawitem(item, x, y += bh, mw - x);
    174 	} else if (matches) {
    175 		/* draw horizontal list */
    176 		x += inputw;
    177 		w = TEXTW("<");
    178 		if (curr->left) {
    179 			drw_setscheme(drw, scheme[SchemeNorm]);
    180 			drw_text(drw, x, 0, w, bh, lrpad / 2, "<", 0);
    181 		}
    182 		x += w;
    183 		for (item = curr; item != next; item = item->right)
    184 			x = drawitem(item, x, 0, textw_clamp(item->text, mw - x - TEXTW(">")));
    185 		if (next) {
    186 			w = TEXTW(">");
    187 			drw_setscheme(drw, scheme[SchemeNorm]);
    188 			drw_text(drw, mw - w, 0, w, bh, lrpad / 2, ">", 0);
    189 		}
    190 	}
    191 	drw_map(drw, win, 0, 0, mw, mh);
    192 }
    193 
    194 static void
    195 grabfocus(void)
    196 {
    197 	struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000  };
    198 	Window focuswin;
    199 	int i, revertwin;
    200 
    201 	for (i = 0; i < 100; ++i) {
    202 		XGetInputFocus(dpy, &focuswin, &revertwin);
    203 		if (focuswin == win)
    204 			return;
    205 		XSetInputFocus(dpy, win, RevertToParent, CurrentTime);
    206 		nanosleep(&ts, NULL);
    207 	}
    208 	die("cannot grab focus");
    209 }
    210 
    211 static void
    212 grabkeyboard(void)
    213 {
    214 	struct timespec ts = { .tv_sec = 0, .tv_nsec = 1000000  };
    215 	int i;
    216 
    217 	if (embed)
    218 		return;
    219 	/* try to grab keyboard, we may have to wait for another process to ungrab */
    220 	for (i = 0; i < 1000; i++) {
    221 		if (XGrabKeyboard(dpy, DefaultRootWindow(dpy), True, GrabModeAsync,
    222 		                  GrabModeAsync, CurrentTime) == GrabSuccess)
    223 			return;
    224 		nanosleep(&ts, NULL);
    225 	}
    226 	die("cannot grab keyboard");
    227 }
    228 
    229 static void
    230 match(void)
    231 {
    232 	static char **tokv = NULL;
    233 	static int tokn = 0;
    234 
    235 	char buf[sizeof text], *s;
    236 	int i, tokc = 0;
    237 	size_t len, textsize;
    238 	struct item *item, *lprefix, *lsubstr, *prefixend, *substrend;
    239 
    240 	strcpy(buf, text);
    241 	/* separate input text into tokens to be matched individually */
    242 	for (s = strtok(buf, " "); s; tokv[tokc - 1] = s, s = strtok(NULL, " "))
    243 		if (++tokc > tokn && !(tokv = realloc(tokv, ++tokn * sizeof *tokv)))
    244 			die("cannot realloc %zu bytes:", tokn * sizeof *tokv);
    245 	len = tokc ? strlen(tokv[0]) : 0;
    246 
    247 	matches = lprefix = lsubstr = matchend = prefixend = substrend = NULL;
    248 	textsize = strlen(text) + 1;
    249 	for (item = items; item && item->text; item++) {
    250 		for (i = 0; i < tokc; i++)
    251 			if (!fstrstr(item->text, tokv[i]))
    252 				break;
    253 		if (i != tokc) /* not all tokens match */
    254 			continue;
    255 		/* exact matches go first, then prefixes, then substrings */
    256 		if (!tokc || !fstrncmp(text, item->text, textsize))
    257 			appenditem(item, &matches, &matchend);
    258 		else if (!fstrncmp(tokv[0], item->text, len))
    259 			appenditem(item, &lprefix, &prefixend);
    260 		else
    261 			appenditem(item, &lsubstr, &substrend);
    262 	}
    263 	if (lprefix) {
    264 		if (matches) {
    265 			matchend->right = lprefix;
    266 			lprefix->left = matchend;
    267 		} else
    268 			matches = lprefix;
    269 		matchend = prefixend;
    270 	}
    271 	if (lsubstr) {
    272 		if (matches) {
    273 			matchend->right = lsubstr;
    274 			lsubstr->left = matchend;
    275 		} else
    276 			matches = lsubstr;
    277 		matchend = substrend;
    278 	}
    279 	curr = sel = matches;
    280 	calcoffsets();
    281 }
    282 
    283 static void
    284 insert(const char *str, ssize_t n)
    285 {
    286 	if (strlen(text) + n > sizeof text - 1)
    287 		return;
    288 	/* move existing text out of the way, insert new text, and update cursor */
    289 	memmove(&text[cursor + n], &text[cursor], sizeof text - cursor - MAX(n, 0));
    290 	if (n > 0)
    291 		memcpy(&text[cursor], str, n);
    292 	cursor += n;
    293 	match();
    294 }
    295 
    296 static size_t
    297 nextrune(int inc)
    298 {
    299 	ssize_t n;
    300 
    301 	/* return location of next utf8 rune in the given direction (+1 or -1) */
    302 	for (n = cursor + inc; n + inc >= 0 && (text[n] & 0xc0) == 0x80; n += inc)
    303 		;
    304 	return n;
    305 }
    306 
    307 static void
    308 movewordedge(int dir)
    309 {
    310 	if (dir < 0) { /* move cursor to the start of the word*/
    311 		while (cursor > 0 && strchr(worddelimiters, text[nextrune(-1)]))
    312 			cursor = nextrune(-1);
    313 		while (cursor > 0 && !strchr(worddelimiters, text[nextrune(-1)]))
    314 			cursor = nextrune(-1);
    315 	} else { /* move cursor to the end of the word */
    316 		while (text[cursor] && strchr(worddelimiters, text[cursor]))
    317 			cursor = nextrune(+1);
    318 		while (text[cursor] && !strchr(worddelimiters, text[cursor]))
    319 			cursor = nextrune(+1);
    320 	}
    321 }
    322 
    323 static void
    324 keypress(XKeyEvent *ev)
    325 {
    326 	char buf[64];
    327 	int len;
    328 	KeySym ksym = NoSymbol;
    329 	Status status;
    330 
    331 	len = XmbLookupString(xic, ev, buf, sizeof buf, &ksym, &status);
    332 	switch (status) {
    333 	default: /* XLookupNone, XBufferOverflow */
    334 		return;
    335 	case XLookupChars: /* composed string from input method */
    336 		goto insert;
    337 	case XLookupKeySym:
    338 	case XLookupBoth: /* a KeySym and a string are returned: use keysym */
    339 		break;
    340 	}
    341 
    342 	if (ev->state & ControlMask) {
    343 		switch(ksym) {
    344 		case XK_a: ksym = XK_Home;      break;
    345 		case XK_b: ksym = XK_Left;      break;
    346 		case XK_c: ksym = XK_Escape;    break;
    347 		case XK_d: ksym = XK_Delete;    break;
    348 		case XK_e: ksym = XK_End;       break;
    349 		case XK_f: ksym = XK_Right;     break;
    350 		case XK_g: ksym = XK_Escape;    break;
    351 		case XK_h: ksym = XK_BackSpace; break;
    352 		case XK_i: ksym = XK_Tab;       break;
    353 		case XK_j: /* fallthrough */
    354 		case XK_J: /* fallthrough */
    355 		case XK_m: /* fallthrough */
    356 		case XK_M: ksym = XK_Return; ev->state &= ~ControlMask; break;
    357 		case XK_n: ksym = XK_Down;      break;
    358 		case XK_p: ksym = XK_Up;        break;
    359 
    360 		case XK_k: /* delete right */
    361 			text[cursor] = '\0';
    362 			match();
    363 			break;
    364 		case XK_u: /* delete left */
    365 			insert(NULL, 0 - cursor);
    366 			break;
    367 		case XK_w: /* delete word */
    368 			while (cursor > 0 && strchr(worddelimiters, text[nextrune(-1)]))
    369 				insert(NULL, nextrune(-1) - cursor);
    370 			while (cursor > 0 && !strchr(worddelimiters, text[nextrune(-1)]))
    371 				insert(NULL, nextrune(-1) - cursor);
    372 			break;
    373 		case XK_y: /* paste selection */
    374 		case XK_Y:
    375 			XConvertSelection(dpy, (ev->state & ShiftMask) ? clip : XA_PRIMARY,
    376 			                  utf8, utf8, win, CurrentTime);
    377 			return;
    378 		case XK_Left:
    379 		case XK_KP_Left:
    380 			movewordedge(-1);
    381 			goto draw;
    382 		case XK_Right:
    383 		case XK_KP_Right:
    384 			movewordedge(+1);
    385 			goto draw;
    386 		case XK_Return:
    387 		case XK_KP_Enter:
    388 			break;
    389 		case XK_bracketleft:
    390 			cleanup();
    391 			exit(1);
    392 		default:
    393 			return;
    394 		}
    395 	} else if (ev->state & Mod1Mask) {
    396 		switch(ksym) {
    397 		case XK_b:
    398 			movewordedge(-1);
    399 			goto draw;
    400 		case XK_f:
    401 			movewordedge(+1);
    402 			goto draw;
    403 		case XK_g: ksym = XK_Home;  break;
    404 		case XK_G: ksym = XK_End;   break;
    405 		case XK_h: ksym = XK_Up;    break;
    406 		case XK_j: ksym = XK_Next;  break;
    407 		case XK_k: ksym = XK_Prior; break;
    408 		case XK_l: ksym = XK_Down;  break;
    409 		default:
    410 			return;
    411 		}
    412 	}
    413 
    414 	switch(ksym) {
    415 	default:
    416 insert:
    417 		if (!iscntrl((unsigned char)*buf))
    418 			insert(buf, len);
    419 		break;
    420 	case XK_Delete:
    421 	case XK_KP_Delete:
    422 		if (text[cursor] == '\0')
    423 			return;
    424 		cursor = nextrune(+1);
    425 		/* fallthrough */
    426 	case XK_BackSpace:
    427 		if (cursor == 0)
    428 			return;
    429 		insert(NULL, nextrune(-1) - cursor);
    430 		break;
    431 	case XK_End:
    432 	case XK_KP_End:
    433 		if (text[cursor] != '\0') {
    434 			cursor = strlen(text);
    435 			break;
    436 		}
    437 		if (next) {
    438 			/* jump to end of list and position items in reverse */
    439 			curr = matchend;
    440 			calcoffsets();
    441 			curr = prev;
    442 			calcoffsets();
    443 			while (next && (curr = curr->right))
    444 				calcoffsets();
    445 		}
    446 		sel = matchend;
    447 		break;
    448 	case XK_Escape:
    449 		cleanup();
    450 		exit(1);
    451 	case XK_Home:
    452 	case XK_KP_Home:
    453 		if (sel == matches) {
    454 			cursor = 0;
    455 			break;
    456 		}
    457 		sel = curr = matches;
    458 		calcoffsets();
    459 		break;
    460 	case XK_Left:
    461 	case XK_KP_Left:
    462 		if (cursor > 0 && (!sel || !sel->left || lines > 0)) {
    463 			cursor = nextrune(-1);
    464 			break;
    465 		}
    466 		if (lines > 0)
    467 			return;
    468 		/* fallthrough */
    469 	case XK_Up:
    470 	case XK_KP_Up:
    471 		if (sel && sel->left && (sel = sel->left)->right == curr) {
    472 			curr = prev;
    473 			calcoffsets();
    474 		}
    475 		break;
    476 	case XK_Next:
    477 	case XK_KP_Next:
    478 		if (!next)
    479 			return;
    480 		sel = curr = next;
    481 		calcoffsets();
    482 		break;
    483 	case XK_Prior:
    484 	case XK_KP_Prior:
    485 		if (!prev)
    486 			return;
    487 		sel = curr = prev;
    488 		calcoffsets();
    489 		break;
    490 	case XK_Return:
    491 	case XK_KP_Enter:
    492 		puts((sel && !(ev->state & ShiftMask)) ? sel->text : text);
    493 		if (!(ev->state & ControlMask)) {
    494 			cleanup();
    495 			exit(0);
    496 		}
    497 		if (sel)
    498 			sel->out = 1;
    499 		break;
    500 	case XK_Right:
    501 	case XK_KP_Right:
    502 		if (text[cursor] != '\0') {
    503 			cursor = nextrune(+1);
    504 			break;
    505 		}
    506 		if (lines > 0)
    507 			return;
    508 		/* fallthrough */
    509 	case XK_Down:
    510 	case XK_KP_Down:
    511 		if (sel && sel->right && (sel = sel->right) == next) {
    512 			curr = next;
    513 			calcoffsets();
    514 		}
    515 		break;
    516 	case XK_Tab:
    517 		if (!sel)
    518 			return;
    519 		cursor = strnlen(sel->text, sizeof text - 1);
    520 		memcpy(text, sel->text, cursor);
    521 		text[cursor] = '\0';
    522 		match();
    523 		break;
    524 	}
    525 
    526 draw:
    527 	drawmenu();
    528 }
    529 
    530 static void
    531 paste(void)
    532 {
    533 	char *p, *q;
    534 	int di;
    535 	unsigned long dl;
    536 	Atom da;
    537 
    538 	/* we have been given the current selection, now insert it into input */
    539 	if (XGetWindowProperty(dpy, win, utf8, 0, (sizeof text / 4) + 1, False,
    540 	                   utf8, &da, &di, &dl, &dl, (unsigned char **)&p)
    541 	    == Success && p) {
    542 		insert(p, (q = strchr(p, '\n')) ? q - p : (ssize_t)strlen(p));
    543 		XFree(p);
    544 	}
    545 	drawmenu();
    546 }
    547 
    548 static void
    549 readstdin(void)
    550 {
    551 	char *line = NULL;
    552 	size_t i, itemsiz = 0, linesiz = 0;
    553 	ssize_t len;
    554 
    555 	/* read each line from stdin and add it to the item list */
    556 	for (i = 0; (len = getline(&line, &linesiz, stdin)) != -1; i++) {
    557 		if (i + 1 >= itemsiz) {
    558 			itemsiz += 256;
    559 			if (!(items = realloc(items, itemsiz * sizeof(*items))))
    560 				die("cannot realloc %zu bytes:", itemsiz * sizeof(*items));
    561 		}
    562 		if (line[len - 1] == '\n')
    563 			line[len - 1] = '\0';
    564 		if (!(items[i].text = strdup(line)))
    565 			die("strdup:");
    566 
    567 		items[i].out = 0;
    568 	}
    569 	free(line);
    570 	if (items)
    571 		items[i].text = NULL;
    572 	lines = MIN(lines, i);
    573 }
    574 
    575 static void
    576 run(void)
    577 {
    578 	XEvent ev;
    579 
    580 	while (!XNextEvent(dpy, &ev)) {
    581 		if (XFilterEvent(&ev, win))
    582 			continue;
    583 		switch(ev.type) {
    584 		case DestroyNotify:
    585 			if (ev.xdestroywindow.window != win)
    586 				break;
    587 			cleanup();
    588 			exit(1);
    589 		case Expose:
    590 			if (ev.xexpose.count == 0)
    591 				drw_map(drw, win, 0, 0, mw, mh);
    592 			break;
    593 		case FocusIn:
    594 			/* regrab focus from parent window */
    595 			if (ev.xfocus.window != win)
    596 				grabfocus();
    597 			break;
    598 		case KeyPress:
    599 			keypress(&ev.xkey);
    600 			break;
    601 		case SelectionNotify:
    602 			if (ev.xselection.property == utf8)
    603 				paste();
    604 			break;
    605 		case VisibilityNotify:
    606 			if (ev.xvisibility.state != VisibilityUnobscured)
    607 				XRaiseWindow(dpy, win);
    608 			break;
    609 		}
    610 	}
    611 }
    612 
    613 static void
    614 setup(void)
    615 {
    616 	int x, y, i, j;
    617 	unsigned int du;
    618 	XSetWindowAttributes swa;
    619 	XIM xim;
    620 	Window w, dw, *dws;
    621 	XWindowAttributes wa;
    622 	XClassHint ch = {"dmenu", "dmenu"};
    623 #ifdef XINERAMA
    624 	XineramaScreenInfo *info;
    625 	Window pw;
    626 	int a, di, n, area = 0;
    627 #endif
    628 	/* init appearance */
    629 	for (j = 0; j < SchemeLast; j++)
    630 		scheme[j] = drw_scm_create(drw, colors[j], 2);
    631 
    632 	clip = XInternAtom(dpy, "CLIPBOARD",   False);
    633 	utf8 = XInternAtom(dpy, "UTF8_STRING", False);
    634 
    635 	/* calculate menu geometry */
    636 	bh = drw->fonts->h + 2;
    637 	lines = MAX(lines, 0);
    638 	mh = (lines + 1) * bh;
    639 #ifdef XINERAMA
    640 	i = 0;
    641 	if (parentwin == root && (info = XineramaQueryScreens(dpy, &n))) {
    642 		XGetInputFocus(dpy, &w, &di);
    643 		if (mon >= 0 && mon < n)
    644 			i = mon;
    645 		else if (w != root && w != PointerRoot && w != None) {
    646 			/* find top-level window containing current input focus */
    647 			do {
    648 				if (XQueryTree(dpy, (pw = w), &dw, &w, &dws, &du) && dws)
    649 					XFree(dws);
    650 			} while (w != root && w != pw);
    651 			/* find xinerama screen with which the window intersects most */
    652 			if (XGetWindowAttributes(dpy, pw, &wa))
    653 				for (j = 0; j < n; j++)
    654 					if ((a = INTERSECT(wa.x, wa.y, wa.width, wa.height, info[j])) > area) {
    655 						area = a;
    656 						i = j;
    657 					}
    658 		}
    659 		/* no focused window is on screen, so use pointer location instead */
    660 		if (mon < 0 && !area && XQueryPointer(dpy, root, &dw, &dw, &x, &y, &di, &di, &du))
    661 			for (i = 0; i < n; i++)
    662 				if (INTERSECT(x, y, 1, 1, info[i]) != 0)
    663 					break;
    664 
    665 		x = info[i].x_org;
    666 		y = info[i].y_org + (topbar ? 0 : info[i].height - mh);
    667 		mw = info[i].width;
    668 		XFree(info);
    669 	} else
    670 #endif
    671 	{
    672 		if (!XGetWindowAttributes(dpy, parentwin, &wa))
    673 			die("could not get embedding window attributes: 0x%lx",
    674 			    parentwin);
    675 		x = 0;
    676 		y = topbar ? 0 : wa.height - mh;
    677 		mw = wa.width;
    678 	}
    679 	promptw = (prompt && *prompt) ? TEXTW(prompt) - lrpad / 4 : 0;
    680 	inputw = mw / 3; /* input width: ~33% of monitor width */
    681 	match();
    682 
    683 	/* create menu window */
    684 	swa.override_redirect = True;
    685 	swa.background_pixel = scheme[SchemeNorm][ColBg].pixel;
    686 	swa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
    687 	win = XCreateWindow(dpy, root, x, y, mw, mh, 0,
    688 	                    CopyFromParent, CopyFromParent, CopyFromParent,
    689 	                    CWOverrideRedirect | CWBackPixel | CWEventMask, &swa);
    690 	XSetClassHint(dpy, win, &ch);
    691 
    692 
    693 	/* input methods */
    694 	if ((xim = XOpenIM(dpy, NULL, NULL, NULL)) == NULL)
    695 		die("XOpenIM failed: could not open input device");
    696 
    697 	xic = XCreateIC(xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
    698 	                XNClientWindow, win, XNFocusWindow, win, NULL);
    699 
    700 	XMapRaised(dpy, win);
    701 	if (embed) {
    702 		XReparentWindow(dpy, win, parentwin, x, y);
    703 		XSelectInput(dpy, parentwin, FocusChangeMask | SubstructureNotifyMask);
    704 		if (XQueryTree(dpy, parentwin, &dw, &w, &dws, &du) && dws) {
    705 			for (i = 0; i < du && dws[i] != win; ++i)
    706 				XSelectInput(dpy, dws[i], FocusChangeMask);
    707 			XFree(dws);
    708 		}
    709 		grabfocus();
    710 	}
    711 	drw_resize(drw, mw, mh);
    712 	drawmenu();
    713 }
    714 
    715 static void
    716 usage(void)
    717 {
    718 	die("usage: dmenu [-bfiv] [-l lines] [-p prompt] [-fn font] [-m monitor]\n"
    719 	    "             [-nb color] [-nf color] [-sb color] [-sf color] [-w windowid]");
    720 }
    721 
    722 int
    723 main(int argc, char *argv[])
    724 {
    725 	XWindowAttributes wa;
    726 	int i, fast = 0;
    727 
    728 	for (i = 1; i < argc; i++)
    729 		/* these options take no arguments */
    730 		if (!strcmp(argv[i], "-v")) {      /* prints version information */
    731 			puts("dmenu-"VERSION);
    732 			exit(0);
    733 		} else if (!strcmp(argv[i], "-b")) /* appears at the bottom of the screen */
    734 			topbar = 0;
    735 		else if (!strcmp(argv[i], "-f"))   /* grabs keyboard before reading stdin */
    736 			fast = 1;
    737 		else if (!strcmp(argv[i], "-i")) { /* case-insensitive item matching */
    738 			fstrncmp = strncasecmp;
    739 			fstrstr = cistrstr;
    740 		} else if (i + 1 == argc)
    741 			usage();
    742 		/* these options take one argument */
    743 		else if (!strcmp(argv[i], "-l"))   /* number of lines in vertical list */
    744 			lines = atoi(argv[++i]);
    745 		else if (!strcmp(argv[i], "-m"))
    746 			mon = atoi(argv[++i]);
    747 		else if (!strcmp(argv[i], "-p"))   /* adds prompt to left of input field */
    748 			prompt = argv[++i];
    749 		else if (!strcmp(argv[i], "-fn"))  /* font or font set */
    750 			fonts[0] = argv[++i];
    751 		else if (!strcmp(argv[i], "-nb"))  /* normal background color */
    752 			colors[SchemeNorm][ColBg] = argv[++i];
    753 		else if (!strcmp(argv[i], "-nf"))  /* normal foreground color */
    754 			colors[SchemeNorm][ColFg] = argv[++i];
    755 		else if (!strcmp(argv[i], "-sb"))  /* selected background color */
    756 			colors[SchemeSel][ColBg] = argv[++i];
    757 		else if (!strcmp(argv[i], "-sf"))  /* selected foreground color */
    758 			colors[SchemeSel][ColFg] = argv[++i];
    759 		else if (!strcmp(argv[i], "-w"))   /* embedding window id */
    760 			embed = argv[++i];
    761 		else
    762 			usage();
    763 
    764 	if (!setlocale(LC_CTYPE, "") || !XSupportsLocale())
    765 		fputs("warning: no locale support\n", stderr);
    766 	if (!(dpy = XOpenDisplay(NULL)))
    767 		die("cannot open display");
    768 	screen = DefaultScreen(dpy);
    769 	root = RootWindow(dpy, screen);
    770 	if (!embed || !(parentwin = strtol(embed, NULL, 0)))
    771 		parentwin = root;
    772 	if (!XGetWindowAttributes(dpy, parentwin, &wa))
    773 		die("could not get embedding window attributes: 0x%lx",
    774 		    parentwin);
    775 	drw = drw_create(dpy, screen, root, wa.width, wa.height);
    776 	if (!drw_fontset_create(drw, fonts, LENGTH(fonts)))
    777 		die("no fonts could be loaded.");
    778 	lrpad = drw->fonts->h;
    779 
    780 #ifdef __OpenBSD__
    781 	if (pledge("stdio rpath", NULL) == -1)
    782 		die("pledge");
    783 #endif
    784 
    785 	if (fast && !isatty(0)) {
    786 		grabkeyboard();
    787 		readstdin();
    788 	} else {
    789 		readstdin();
    790 		grabkeyboard();
    791 	}
    792 	setup();
    793 	run();
    794 
    795 	return 1; /* unreachable */
    796 }