sistema_progs

Programas para customizar o meu entorno de traballo nos meus equipos persoais
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dmenu.c (19273B)


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