1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/aewl.c	Fri May 30 22:18:18 2008 +0200
     1.3 @@ -0,0 +1,1783 @@
     1.4 +/* (C)opyright MMVI-MMVII Anselm R. Garbe <garbeam at gmail dot com>
     1.5 + * (C)opyright MMVIII markus schnalke <meillo at marmaro dot de>
     1.6 + * See LICENSE file for license details.
     1.7 + *
     1.8 + * dynamic window manager is designed like any other X client as well. It is
     1.9 + * driven through handling X events. In contrast to other X clients, a window
    1.10 + * manager selects for SubstructureRedirectMask on the root window, to receive
    1.11 + * events about window (dis-)appearance.  Only one X connection at a time is
    1.12 + * allowed to select for this event mask.
    1.13 + *
    1.14 + * Calls to fetch an X event from the event queue are blocking.  Due reading
    1.15 + * status text from standard input, a select()-driven main loop has been
    1.16 + * implemented which selects for reads on the X connection and STDIN_FILENO to
    1.17 + * handle all data smoothly. The event handlers of dwm are organized in an
    1.18 + * array which is accessed whenever a new event has been fetched. This allows
    1.19 + * event dispatching in O(1) time.
    1.20 + *
    1.21 + * Each child of the root window is called a client, except windows which have
    1.22 + * set the override_redirect flag.  Clients are organized in a global
    1.23 + * doubly-linked client list, the focus history is remembered through a global
    1.24 + * stack list. Each client contains an array of Bools of the same size as the
    1.25 + * global tags array to indicate the tags of a client.  For each client dwm
    1.26 + * creates a small title window, which is resized whenever the (_NET_)WM_NAME
    1.27 + * properties are updated or the client is moved/resized.
    1.28 + *
    1.29 + * Keys and tagging rules are organized as arrays and defined in the config.h
    1.30 + * file. These arrays are kept static in event.o and tag.o respectively,
    1.31 + * because no other part of dwm needs access to them.  The current mode is
    1.32 + * represented by the arrange() function pointer, which wether points to
    1.33 + * dofloat() or dotile().
    1.34 + *
    1.35 + * To understand everything else, start reading main.c:main().
    1.36 + */
    1.37 +
    1.38 +#include "config.h"
    1.39 +#include <errno.h>
    1.40 +#include <locale.h>
    1.41 +#include <regex.h>
    1.42 +#include <stdio.h>
    1.43 +#include <stdarg.h>
    1.44 +#include <stdlib.h>
    1.45 +#include <string.h>
    1.46 +#include <unistd.h>
    1.47 +#include <sys/select.h>
    1.48 +#include <sys/types.h>
    1.49 +#include <sys/wait.h>
    1.50 +#include <X11/cursorfont.h>
    1.51 +#include <X11/keysym.h>
    1.52 +#include <X11/Xatom.h>
    1.53 +#include <X11/Xlib.h>
    1.54 +#include <X11/Xproto.h>
    1.55 +#include <X11/Xutil.h>
    1.56 +
    1.57 +/* mask shorthands, used in event.c and client.c */
    1.58 +#define BUTTONMASK		(ButtonPressMask | ButtonReleaseMask)
    1.59 +
    1.60 +enum { NetSupported, NetWMName, NetLast };		/* EWMH atoms */
    1.61 +enum { WMProtocols, WMDelete, WMState, WMLast };	/* default atoms */
    1.62 +enum { CurNormal, CurResize, CurMove, CurLast };	/* cursor */
    1.63 +enum { ColBorder, ColFG, ColBG, ColLast };		/* color */
    1.64 +
    1.65 +typedef struct {
    1.66 +	int ascent;
    1.67 +	int descent;
    1.68 +	int height;
    1.69 +	XFontSet set;
    1.70 +	XFontStruct *xfont;
    1.71 +} Fnt;
    1.72 +
    1.73 +typedef struct {
    1.74 +	int x, y, w, h;
    1.75 +	unsigned long norm[ColLast];
    1.76 +	unsigned long sel[ColLast];
    1.77 +	Drawable drawable;
    1.78 +	Fnt font;
    1.79 +	GC gc;
    1.80 +} DC; /* draw context */
    1.81 +
    1.82 +typedef struct Client Client;
    1.83 +struct Client {
    1.84 +	char name[256];
    1.85 +	int x, y, w, h;
    1.86 +	int rx, ry, rw, rh; /* revert geometry */
    1.87 +	int basew, baseh, incw, inch, maxw, maxh, minw, minh;
    1.88 +	int minax, minay, maxax, maxay;
    1.89 +	long flags;
    1.90 +	unsigned int border;
    1.91 +	Bool isfixed, isfloat, ismax;
    1.92 +	Bool tag;
    1.93 +	Client *next;
    1.94 +	Client *prev;
    1.95 +	Client *snext;
    1.96 +	Window win;
    1.97 +};
    1.98 +
    1.99 +typedef struct {
   1.100 +	const char *clpattern;
   1.101 +	int tag;
   1.102 +	Bool isfloat;
   1.103 +} Rule;
   1.104 +
   1.105 +typedef struct {
   1.106 +	regex_t *clregex;
   1.107 +} RReg;
   1.108 +
   1.109 +
   1.110 +typedef struct {
   1.111 +	unsigned long mod;
   1.112 +	KeySym keysym;
   1.113 +	void (*func)(const char* cmd);
   1.114 +	const char* cmd;
   1.115 +} Key;
   1.116 +
   1.117 +
   1.118 +#define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
   1.119 +#define MOUSEMASK		(BUTTONMASK | PointerMotionMask)
   1.120 +
   1.121 +
   1.122 +
   1.123 +const char *tags[];			/* all tags */
   1.124 +char stext[256];				/* status text */
   1.125 +int bh, bmw;				/* bar height, bar mode label width */
   1.126 +int screen, sx, sy, sw, sh;		/* screen geometry */
   1.127 +int wax, way, wah, waw;			/* windowarea geometry */
   1.128 +unsigned int nmaster;		/* number of master clients */
   1.129 +unsigned int ntags, numlockmask;		/* number of tags, dynamic lock mask */
   1.130 +void (*handler[LASTEvent])(XEvent *);	/* event handler */
   1.131 +void (*arrange)(void);			/* arrange function, indicates mode  */
   1.132 +Atom wmatom[WMLast], netatom[NetLast];
   1.133 +Bool running, selscreen, seltag;	/* seltag is array of Bool */
   1.134 +Client *clients, *sel, *stack;		/* global client list and stack */
   1.135 +Cursor cursor[CurLast];
   1.136 +DC dc;					/* global draw context */
   1.137 +Display *dpy;
   1.138 +Window root, barwin;
   1.139 +
   1.140 +Bool running = True;
   1.141 +Bool selscreen = True;
   1.142 +Client *clients = NULL;
   1.143 +Client *sel = NULL;
   1.144 +Client *stack = NULL;
   1.145 +DC dc = {0};
   1.146 +
   1.147 +static int (*xerrorxlib)(Display *, XErrorEvent *);
   1.148 +static Bool otherwm, readin;
   1.149 +static RReg *rreg = NULL;
   1.150 +static unsigned int len = 0;
   1.151 +
   1.152 +
   1.153 +TAGS
   1.154 +RULES
   1.155 +
   1.156 +
   1.157 +/* client.c */
   1.158 +void configure(Client *c);		/* send synthetic configure event */
   1.159 +void focus(Client *c);			/* focus c, c may be NULL */
   1.160 +Client *getclient(Window w);		/* return client of w */
   1.161 +Bool isprotodel(Client *c);		/* returns True if c->win supports wmatom[WMDelete] */
   1.162 +void manage(Window w, XWindowAttributes *wa);	/* manage new client */
   1.163 +void resize(Client *c, Bool sizehints);	/* resize c*/
   1.164 +void updatesizehints(Client *c);		/* update the size hint variables of c */
   1.165 +void updatetitle(Client *c);		/* update the name of c */
   1.166 +void unmanage(Client *c);		/* destroy c */
   1.167 +
   1.168 +/* draw.c */
   1.169 +void drawstatus(void);			/* draw the bar */
   1.170 +unsigned long getcolor(const char *colstr);	/* return color of colstr */
   1.171 +void setfont(const char *fontstr);	/* set the font for DC */
   1.172 +unsigned int textw(const char *text);	/* return the width of text in px*/
   1.173 +
   1.174 +/* event.c */
   1.175 +void grabkeys(void);			/* grab all keys defined in config.h */
   1.176 +void procevent(void);			/* process pending X events */
   1.177 +
   1.178 +/* main.c */
   1.179 +void sendevent(Window w, Atom a, long value);	/* send synthetic event to w */
   1.180 +int xerror(Display *dsply, XErrorEvent *ee);	/* dwm's X error handler */
   1.181 +
   1.182 +/* tag.c */
   1.183 +void initrregs(void);			/* initialize regexps of rules defined in config.h */
   1.184 +Client *getnext(Client *c);		/* returns next visible client */
   1.185 +void settags(Client *c, Client *trans);	/* sets tags of c */
   1.186 +
   1.187 +/* util.c */
   1.188 +void *emallocz(unsigned int size);	/* allocates zero-initialized memory, exits on error */
   1.189 +void eprint(const char *errstr, ...);	/* prints errstr and exits with 1 */
   1.190 +
   1.191 +/* view.c */
   1.192 +void detach(Client *c);			/* detaches c from global client list */
   1.193 +void dofloat(void);			/* arranges all windows floating */
   1.194 +void dotile(void);			/* arranges all windows tiled */
   1.195 +void domax(void);            /* arranges all windows fullscreen */
   1.196 +Bool isvisible(Client *c);		/* returns True if client is visible */
   1.197 +void restack(void);			/* restores z layers of all clients */
   1.198 +
   1.199 +
   1.200 +void toggleview();			/* toggle the viewed tag */
   1.201 +void focusnext();		/* focuses next visible client  */
   1.202 +void zoom();			/* zooms the focused client to master area */
   1.203 +void killclient();		/* kill c nicely */
   1.204 +void quit();			/* quit dwm nicely */
   1.205 +void togglemode();		/* toggles global arrange function (dotile/dofloat) */
   1.206 +void togglefloat();		/* toggles focusesd client between floating/non-floating state */
   1.207 +void incnmaster();		/* increments nmaster */
   1.208 +void decnmaster();		/* decrements nmaster */
   1.209 +void toggletag();		/* toggles c tag */
   1.210 +void spawn(const char* cmd);			/* forks a new subprocess with cmd */
   1.211 +
   1.212 +
   1.213 +
   1.214 +
   1.215 +
   1.216 +
   1.217 +
   1.218 +
   1.219 +
   1.220 +
   1.221 +/* from view.c */
   1.222 +/* static */
   1.223 +
   1.224 +static Client *
   1.225 +nexttiled(Client *c) {
   1.226 +	for(c = getnext(c); c && c->isfloat; c = getnext(c->next));
   1.227 +	return c;
   1.228 +}
   1.229 +
   1.230 +static void
   1.231 +togglemax(Client *c) {
   1.232 +	XEvent ev;
   1.233 +		
   1.234 +	if(c->isfixed)
   1.235 +		return;
   1.236 +
   1.237 +	if((c->ismax = !c->ismax)) {
   1.238 +		c->rx = c->x; c->x = wax;
   1.239 +		c->ry = c->y; c->y = way;
   1.240 +		c->rw = c->w; c->w = waw - 2 * BORDERPX;
   1.241 +		c->rh = c->h; c->h = wah - 2 * BORDERPX;
   1.242 +	}
   1.243 +	else {
   1.244 +		c->x = c->rx;
   1.245 +		c->y = c->ry;
   1.246 +		c->w = c->rw;
   1.247 +		c->h = c->rh;
   1.248 +	}
   1.249 +	resize(c, True);
   1.250 +	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
   1.251 +}
   1.252 +
   1.253 +
   1.254 +
   1.255 +void (*arrange)(void) = DEFMODE;
   1.256 +
   1.257 +void
   1.258 +detach(Client *c) {
   1.259 +	if(c->prev)
   1.260 +		c->prev->next = c->next;
   1.261 +	if(c->next)
   1.262 +		c->next->prev = c->prev;
   1.263 +	if(c == clients)
   1.264 +		clients = c->next;
   1.265 +	c->next = c->prev = NULL;
   1.266 +}
   1.267 +
   1.268 +void
   1.269 +dofloat(void) {
   1.270 +	Client *c;
   1.271 +
   1.272 +	for(c = clients; c; c = c->next) {
   1.273 +		if(isvisible(c)) {
   1.274 +			resize(c, True);
   1.275 +		}
   1.276 +		else
   1.277 +			XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
   1.278 +	}
   1.279 +	if(!sel || !isvisible(sel)) {
   1.280 +		for(c = stack; c && !isvisible(c); c = c->snext);
   1.281 +		focus(c);
   1.282 +	}
   1.283 +	restack();
   1.284 +}
   1.285 +
   1.286 +void
   1.287 +dotile(void) {
   1.288 +	unsigned int i, n, mw, mh, tw, th;
   1.289 +	Client *c;
   1.290 +
   1.291 +	for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
   1.292 +		n++;
   1.293 +	/* window geoms */
   1.294 +	mh = (n > nmaster) ? wah / nmaster : wah / (n > 0 ? n : 1);
   1.295 +	mw = (n > nmaster) ? waw / 2 : waw;
   1.296 +	th = (n > nmaster) ? wah / (n - nmaster) : 0;
   1.297 +	tw = waw - mw;
   1.298 +
   1.299 +	for(i = 0, c = clients; c; c = c->next)
   1.300 +		if(isvisible(c)) {
   1.301 +			if(c->isfloat) {
   1.302 +				resize(c, True);
   1.303 +				continue;
   1.304 +			}
   1.305 +			c->ismax = False;
   1.306 +			c->x = wax;
   1.307 +			c->y = way;
   1.308 +			if(i < nmaster) {
   1.309 +				c->y += i * mh;
   1.310 +				c->w = mw - 2 * BORDERPX;
   1.311 +				c->h = mh - 2 * BORDERPX;
   1.312 +			}
   1.313 +			else {  /* tile window */
   1.314 +				c->x += mw;
   1.315 +				c->w = tw - 2 * BORDERPX;
   1.316 +				if(th > 2 * BORDERPX) {
   1.317 +					c->y += (i - nmaster) * th;
   1.318 +					c->h = th - 2 * BORDERPX;
   1.319 +				}
   1.320 +				else /* fallback if th <= 2 * BORDERPX */
   1.321 +					c->h = wah - 2 * BORDERPX;
   1.322 +			}
   1.323 +			resize(c, False);
   1.324 +			i++;
   1.325 +		}
   1.326 +		else
   1.327 +			XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
   1.328 +	if(!sel || !isvisible(sel)) {
   1.329 +		for(c = stack; c && !isvisible(c); c = c->snext);
   1.330 +		focus(c);
   1.331 +	}
   1.332 +	restack();
   1.333 +}
   1.334 +
   1.335 +/* begin code by mitch */
   1.336 +void
   1.337 +arrangemax(Client *c) {
   1.338 +  if(c == sel) {
   1.339 +    c->ismax = True;
   1.340 +    c->x = sx;
   1.341 +    c->y = bh;
   1.342 +    c->w = sw - 2 * BORDERPX;
   1.343 +    c->h = sh - bh - 2 * BORDERPX;
   1.344 +    XRaiseWindow(dpy, c->win);
   1.345 +  } else {
   1.346 +    c->ismax = False;
   1.347 +    XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
   1.348 +    XLowerWindow(dpy, c->win);
   1.349 +  }
   1.350 +}
   1.351 +
   1.352 +void
   1.353 +domax(void) {
   1.354 +  Client *c;
   1.355 +
   1.356 +  for(c = clients; c; c = c->next) {
   1.357 +    if(isvisible(c)) {
   1.358 +      if(c->isfloat) {
   1.359 +        resize(c, True);
   1.360 +        continue;
   1.361 +      }
   1.362 +      arrangemax(c);
   1.363 +      resize(c, False);
   1.364 +    } else {
   1.365 +      XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
   1.366 +    }
   1.367 +
   1.368 +  }
   1.369 +  if(!sel || !isvisible(sel)) {
   1.370 +    for(c = stack; c && !isvisible(c); c = c->snext);
   1.371 +    focus(c);
   1.372 +  }
   1.373 +  restack();
   1.374 +}
   1.375 +/* end code by mitch */
   1.376 +
   1.377 +void
   1.378 +focusnext() {
   1.379 +	Client *c;
   1.380 +
   1.381 +	if(!sel)
   1.382 +		return;
   1.383 +	if(!(c = getnext(sel->next)))
   1.384 +		c = getnext(clients);
   1.385 +	if(c) {
   1.386 +		focus(c);
   1.387 +		restack();
   1.388 +	}
   1.389 +}
   1.390 +
   1.391 +void
   1.392 +incnmaster() {
   1.393 +	if((arrange == dofloat) || (wah / (nmaster + 1) <= 2 * BORDERPX))
   1.394 +		return;
   1.395 +	nmaster++;
   1.396 +	if(sel)
   1.397 +		arrange();
   1.398 +	else
   1.399 +		drawstatus();
   1.400 +}
   1.401 +
   1.402 +void
   1.403 +decnmaster() {
   1.404 +	if((arrange == dofloat) || (nmaster <= 1))
   1.405 +		return;
   1.406 +	nmaster--;
   1.407 +	if(sel)
   1.408 +		arrange();
   1.409 +	else
   1.410 +		drawstatus();
   1.411 +}
   1.412 +
   1.413 +Bool
   1.414 +isvisible(Client *c) {
   1.415 +	if((c->tag && seltag) || (!c->tag && !seltag)) {
   1.416 +		return True;
   1.417 +	}
   1.418 +	return False;
   1.419 +}
   1.420 +
   1.421 +void
   1.422 +restack(void) {
   1.423 +	Client *c;
   1.424 +	XEvent ev;
   1.425 +
   1.426 +	drawstatus();
   1.427 +	if(!sel)
   1.428 +		return;
   1.429 +	if(sel->isfloat || arrange == dofloat)
   1.430 +		XRaiseWindow(dpy, sel->win);
   1.431 +
   1.432 +  /* begin code by mitch */
   1.433 +  if(arrange == domax) {
   1.434 +    for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
   1.435 +      arrangemax(c);
   1.436 +      resize(c, False);
   1.437 +    }
   1.438 +
   1.439 +  } else if (arrange == dotile) {
   1.440 +  /* end code by mitch */
   1.441 +
   1.442 +		if(!sel->isfloat)
   1.443 +			XLowerWindow(dpy, sel->win);
   1.444 +		for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
   1.445 +			if(c == sel)
   1.446 +				continue;
   1.447 +			XLowerWindow(dpy, c->win);
   1.448 +		}
   1.449 +	}
   1.450 +	XSync(dpy, False);
   1.451 +	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
   1.452 +}
   1.453 +
   1.454 +void
   1.455 +togglefloat() {
   1.456 +	if (!sel || arrange == dofloat)
   1.457 +		return;
   1.458 +	sel->isfloat = !sel->isfloat;
   1.459 +	arrange();
   1.460 +}
   1.461 +
   1.462 +void
   1.463 +togglemode() {
   1.464 +  /* only toggle between tile and max - float is just available through togglefloat */
   1.465 +  arrange = (arrange == dotile) ? domax : dotile;
   1.466 +	if(sel)
   1.467 +		arrange();
   1.468 +	else
   1.469 +		drawstatus();
   1.470 +}
   1.471 +
   1.472 +void
   1.473 +toggleview() {
   1.474 +	seltag = !seltag;
   1.475 +	arrange();
   1.476 +}
   1.477 +
   1.478 +void
   1.479 +zoom() {
   1.480 +	unsigned int n;
   1.481 +	Client *c;
   1.482 +
   1.483 +	if(!sel)
   1.484 +		return;
   1.485 +	if(sel->isfloat || (arrange == dofloat)) {
   1.486 +		togglemax(sel);
   1.487 +		return;
   1.488 +	}
   1.489 +	for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
   1.490 +		n++;
   1.491 +
   1.492 +	if((c = sel) == nexttiled(clients))
   1.493 +		if(!(c = nexttiled(c->next)))
   1.494 +			return;
   1.495 +	detach(c);
   1.496 +	if(clients)
   1.497 +		clients->prev = c;
   1.498 +	c->next = clients;
   1.499 +	clients = c;
   1.500 +	focus(c);
   1.501 +	arrange();
   1.502 +}
   1.503 +
   1.504 +
   1.505 +
   1.506 +
   1.507 +
   1.508 +
   1.509 +
   1.510 +
   1.511 +
   1.512 +
   1.513 +
   1.514 +
   1.515 +
   1.516 +
   1.517 +
   1.518 +
   1.519 +/* from util.c */
   1.520 +
   1.521 +
   1.522 +void *
   1.523 +emallocz(unsigned int size) {
   1.524 +	void *res = calloc(1, size);
   1.525 +
   1.526 +	if(!res)
   1.527 +		eprint("fatal: could not malloc() %u bytes\n", size);
   1.528 +	return res;
   1.529 +}
   1.530 +
   1.531 +void
   1.532 +eprint(const char *errstr, ...) {
   1.533 +	va_list ap;
   1.534 +
   1.535 +	va_start(ap, errstr);
   1.536 +	vfprintf(stderr, errstr, ap);
   1.537 +	va_end(ap);
   1.538 +	exit(EXIT_FAILURE);
   1.539 +}
   1.540 +
   1.541 +void
   1.542 +spawn(const char* cmd) {
   1.543 +	static char *shell = NULL;
   1.544 +
   1.545 +	if(!shell && !(shell = getenv("SHELL")))
   1.546 +		shell = "/bin/sh";
   1.547 +	if(!cmd)
   1.548 +		return;
   1.549 +	/* The double-fork construct avoids zombie processes and keeps the code
   1.550 +	 * clean from stupid signal handlers. */
   1.551 +	if(fork() == 0) {
   1.552 +		if(fork() == 0) {
   1.553 +			if(dpy)
   1.554 +				close(ConnectionNumber(dpy));
   1.555 +			setsid();
   1.556 +			execl(shell, shell, "-c", cmd, (char *)NULL);
   1.557 +			fprintf(stderr, "dwm: execl '%s -c %s'", shell, cmd);
   1.558 +			perror(" failed");
   1.559 +		}
   1.560 +		exit(0);
   1.561 +	}
   1.562 +	wait(0);
   1.563 +}
   1.564 +
   1.565 +
   1.566 +
   1.567 +
   1.568 +
   1.569 +
   1.570 +
   1.571 +
   1.572 +
   1.573 +
   1.574 +
   1.575 +
   1.576 +
   1.577 +/* from tag.c */
   1.578 +
   1.579 +/* static */
   1.580 +
   1.581 +Client *
   1.582 +getnext(Client *c) {
   1.583 +	for(; c && !isvisible(c); c = c->next);
   1.584 +	return c;
   1.585 +}
   1.586 +
   1.587 +void
   1.588 +initrregs(void) {
   1.589 +	unsigned int i;
   1.590 +	regex_t *reg;
   1.591 +
   1.592 +	if(rreg)
   1.593 +		return;
   1.594 +	len = sizeof rule / sizeof rule[0];
   1.595 +	rreg = emallocz(len * sizeof(RReg));
   1.596 +	for(i = 0; i < len; i++) {
   1.597 +		if(rule[i].clpattern) {
   1.598 +			reg = emallocz(sizeof(regex_t));
   1.599 +			if(regcomp(reg, rule[i].clpattern, REG_EXTENDED))
   1.600 +				free(reg);
   1.601 +			else
   1.602 +				rreg[i].clregex = reg;
   1.603 +		}
   1.604 +	}
   1.605 +}
   1.606 +
   1.607 +void
   1.608 +settags(Client *c, Client *trans) {
   1.609 +	char prop[512];
   1.610 +	unsigned int i;
   1.611 +	regmatch_t tmp;
   1.612 +	Bool matched = trans != NULL;
   1.613 +	XClassHint ch = { 0 };
   1.614 +
   1.615 +	if(matched) {
   1.616 +		c->tag = trans->tag;
   1.617 +	} else {
   1.618 +		XGetClassHint(dpy, c->win, &ch);
   1.619 +		snprintf(prop, sizeof prop, "%s:%s:%s",
   1.620 +				ch.res_class ? ch.res_class : "",
   1.621 +				ch.res_name ? ch.res_name : "", c->name);
   1.622 +		for(i = 0; i < len; i++)
   1.623 +			if(rreg[i].clregex && !regexec(rreg[i].clregex, prop, 1, &tmp, 0)) {
   1.624 +				c->isfloat = rule[i].isfloat;
   1.625 +				if (rule[i].tag < 0) {
   1.626 +					c->tag = seltag;
   1.627 +				} else if (rule[i].tag == 0) {
   1.628 +					c->tag = True;
   1.629 +				} else {
   1.630 +					c->tag = False;
   1.631 +				}
   1.632 +				matched = True;
   1.633 +        break;  /* perform only the first rule matching */
   1.634 +			}
   1.635 +		if(ch.res_class)
   1.636 +			XFree(ch.res_class);
   1.637 +		if(ch.res_name)
   1.638 +			XFree(ch.res_name);
   1.639 +	}
   1.640 +	if(!matched) {
   1.641 +		c->tag = seltag;
   1.642 +	}
   1.643 +}
   1.644 +
   1.645 +void
   1.646 +toggletag() {
   1.647 +	if(!sel)
   1.648 +		return;
   1.649 +	sel->tag = !sel->tag;
   1.650 +	toggleview();
   1.651 +}
   1.652 +
   1.653 +
   1.654 +
   1.655 +
   1.656 +
   1.657 +
   1.658 +
   1.659 +
   1.660 +
   1.661 +
   1.662 +
   1.663 +
   1.664 +
   1.665 +
   1.666 +
   1.667 +
   1.668 +
   1.669 +/* from event.c */
   1.670 +/* static */
   1.671 +
   1.672 +KEYS
   1.673 +
   1.674 +
   1.675 +
   1.676 +static void
   1.677 +movemouse(Client *c) {
   1.678 +	int x1, y1, ocx, ocy, di;
   1.679 +	unsigned int dui;
   1.680 +	Window dummy;
   1.681 +	XEvent ev;
   1.682 +
   1.683 +	ocx = c->x;
   1.684 +	ocy = c->y;
   1.685 +	if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
   1.686 +			None, cursor[CurMove], CurrentTime) != GrabSuccess)
   1.687 +		return;
   1.688 +	c->ismax = False;
   1.689 +	XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
   1.690 +	for(;;) {
   1.691 +		XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
   1.692 +		switch (ev.type) {
   1.693 +		case ButtonRelease:
   1.694 +			resize(c, True);
   1.695 +			XUngrabPointer(dpy, CurrentTime);
   1.696 +			return;
   1.697 +		case ConfigureRequest:
   1.698 +		case Expose:
   1.699 +		case MapRequest:
   1.700 +			handler[ev.type](&ev);
   1.701 +			break;
   1.702 +		case MotionNotify:
   1.703 +			XSync(dpy, False);
   1.704 +			c->x = ocx + (ev.xmotion.x - x1);
   1.705 +			c->y = ocy + (ev.xmotion.y - y1);
   1.706 +			if(abs(wax + c->x) < SNAP)
   1.707 +				c->x = wax;
   1.708 +			else if(abs((wax + waw) - (c->x + c->w + 2 * c->border)) < SNAP)
   1.709 +				c->x = wax + waw - c->w - 2 * c->border;
   1.710 +			if(abs(way - c->y) < SNAP)
   1.711 +				c->y = way;
   1.712 +			else if(abs((way + wah) - (c->y + c->h + 2 * c->border)) < SNAP)
   1.713 +				c->y = way + wah - c->h - 2 * c->border;
   1.714 +			resize(c, False);
   1.715 +			break;
   1.716 +		}
   1.717 +	}
   1.718 +}
   1.719 +
   1.720 +static void
   1.721 +resizemouse(Client *c) {
   1.722 +	int ocx, ocy;
   1.723 +	int nw, nh;
   1.724 +	XEvent ev;
   1.725 +
   1.726 +	ocx = c->x;
   1.727 +	ocy = c->y;
   1.728 +	if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
   1.729 +			None, cursor[CurResize], CurrentTime) != GrabSuccess)
   1.730 +		return;
   1.731 +	c->ismax = False;
   1.732 +	XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
   1.733 +	for(;;) {
   1.734 +		XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
   1.735 +		switch(ev.type) {
   1.736 +		case ButtonRelease:
   1.737 +			resize(c, True);
   1.738 +			XUngrabPointer(dpy, CurrentTime);
   1.739 +			return;
   1.740 +		case ConfigureRequest:
   1.741 +		case Expose:
   1.742 +		case MapRequest:
   1.743 +			handler[ev.type](&ev);
   1.744 +			break;
   1.745 +		case MotionNotify:
   1.746 +			XSync(dpy, False);
   1.747 +			nw = ev.xmotion.x - ocx - 2 * c->border + 1;
   1.748 +			c->w = nw > 0 ? nw : 1;
   1.749 +			nh = ev.xmotion.y - ocy - 2 * c->border + 1;
   1.750 +			c->h = nh > 0 ? nh : 1;
   1.751 +			resize(c, True);
   1.752 +			break;
   1.753 +		}
   1.754 +	}
   1.755 +}
   1.756 +
   1.757 +static void
   1.758 +buttonpress(XEvent *e) {
   1.759 +	int x;
   1.760 +	int i;
   1.761 +	Client *c;
   1.762 +	XButtonPressedEvent *ev = &e->xbutton;
   1.763 +
   1.764 +	if(barwin == ev->window) {
   1.765 +		if(ev->button == Button1) {
   1.766 +			toggleview();
   1.767 +		}
   1.768 +		return;
   1.769 +	} else if((c = getclient(ev->window))) {
   1.770 +		focus(c);
   1.771 +		if(CLEANMASK(ev->state) != MODKEY)
   1.772 +			return;
   1.773 +		if(ev->button == Button1 && (arrange == dofloat || c->isfloat)) {
   1.774 +			restack();
   1.775 +			movemouse(c);
   1.776 +		} else if(ev->button == Button3 && (arrange == dofloat || c->isfloat) && !c->isfixed) {
   1.777 +			restack();
   1.778 +			resizemouse(c);
   1.779 +		}
   1.780 +	}
   1.781 +}
   1.782 +
   1.783 +static void
   1.784 +configurerequest(XEvent *e) {
   1.785 +	unsigned long newmask;
   1.786 +	Client *c;
   1.787 +	XConfigureRequestEvent *ev = &e->xconfigurerequest;
   1.788 +	XWindowChanges wc;
   1.789 +
   1.790 +	if((c = getclient(ev->window))) {
   1.791 +		c->ismax = False;
   1.792 +		if(ev->value_mask & CWX)
   1.793 +			c->x = ev->x;
   1.794 +		if(ev->value_mask & CWY)
   1.795 +			c->y = ev->y;
   1.796 +		if(ev->value_mask & CWWidth)
   1.797 +			c->w = ev->width;
   1.798 +		if(ev->value_mask & CWHeight)
   1.799 +			c->h = ev->height;
   1.800 +		if(ev->value_mask & CWBorderWidth)
   1.801 +			c->border = ev->border_width;
   1.802 +		wc.x = c->x;
   1.803 +		wc.y = c->y;
   1.804 +		wc.width = c->w;
   1.805 +		wc.height = c->h;
   1.806 +		newmask = ev->value_mask & (~(CWSibling | CWStackMode | CWBorderWidth));
   1.807 +		if(newmask)
   1.808 +			XConfigureWindow(dpy, c->win, newmask, &wc);
   1.809 +		else
   1.810 +			configure(c);
   1.811 +		XSync(dpy, False);
   1.812 +		if(c->isfloat) {
   1.813 +			resize(c, False);
   1.814 +			if(!isvisible(c))
   1.815 +				XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
   1.816 +		}
   1.817 +		else
   1.818 +			arrange();
   1.819 +	} else {
   1.820 +		wc.x = ev->x;
   1.821 +		wc.y = ev->y;
   1.822 +		wc.width = ev->width;
   1.823 +		wc.height = ev->height;
   1.824 +		wc.border_width = ev->border_width;
   1.825 +		wc.sibling = ev->above;
   1.826 +		wc.stack_mode = ev->detail;
   1.827 +		XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
   1.828 +		XSync(dpy, False);
   1.829 +	}
   1.830 +}
   1.831 +
   1.832 +static void
   1.833 +destroynotify(XEvent *e) {
   1.834 +	Client *c;
   1.835 +	XDestroyWindowEvent *ev = &e->xdestroywindow;
   1.836 +
   1.837 +	if((c = getclient(ev->window)))
   1.838 +		unmanage(c);
   1.839 +}
   1.840 +
   1.841 +static void
   1.842 +enternotify(XEvent *e) {
   1.843 +	Client *c;
   1.844 +	XCrossingEvent *ev = &e->xcrossing;
   1.845 +
   1.846 +	if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
   1.847 +		return;
   1.848 +	if((c = getclient(ev->window)) && isvisible(c))
   1.849 +		focus(c);
   1.850 +	else if(ev->window == root) {
   1.851 +		selscreen = True;
   1.852 +		for(c = stack; c && !isvisible(c); c = c->snext);
   1.853 +		focus(c);
   1.854 +	}
   1.855 +}
   1.856 +
   1.857 +static void
   1.858 +expose(XEvent *e) {
   1.859 +	XExposeEvent *ev = &e->xexpose;
   1.860 +
   1.861 +	if(ev->count == 0) {
   1.862 +		if(barwin == ev->window)
   1.863 +			drawstatus();
   1.864 +	}
   1.865 +}
   1.866 +
   1.867 +static void
   1.868 +keypress(XEvent *e) {
   1.869 +	static unsigned int len = sizeof key / sizeof key[0];
   1.870 +	unsigned int i;
   1.871 +	KeySym keysym;
   1.872 +	XKeyEvent *ev = &e->xkey;
   1.873 +
   1.874 +	keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
   1.875 +	for(i = 0; i < len; i++) {
   1.876 +		if(keysym == key[i].keysym && CLEANMASK(key[i].mod) == CLEANMASK(ev->state)) {
   1.877 +			if(key[i].func)
   1.878 +				key[i].func(key[i].cmd);
   1.879 +		}
   1.880 +	}
   1.881 +}
   1.882 +
   1.883 +static void
   1.884 +leavenotify(XEvent *e) {
   1.885 +	XCrossingEvent *ev = &e->xcrossing;
   1.886 +
   1.887 +	if((ev->window == root) && !ev->same_screen) {
   1.888 +		selscreen = False;
   1.889 +		focus(NULL);
   1.890 +	}
   1.891 +}
   1.892 +
   1.893 +static void
   1.894 +mappingnotify(XEvent *e) {
   1.895 +	XMappingEvent *ev = &e->xmapping;
   1.896 +
   1.897 +	XRefreshKeyboardMapping(ev);
   1.898 +	if(ev->request == MappingKeyboard)
   1.899 +		grabkeys();
   1.900 +}
   1.901 +
   1.902 +static void
   1.903 +maprequest(XEvent *e) {
   1.904 +	static XWindowAttributes wa;
   1.905 +	XMapRequestEvent *ev = &e->xmaprequest;
   1.906 +
   1.907 +	if(!XGetWindowAttributes(dpy, ev->window, &wa))
   1.908 +		return;
   1.909 +	if(wa.override_redirect) {
   1.910 +		XSelectInput(dpy, ev->window,
   1.911 +				(StructureNotifyMask | PropertyChangeMask));
   1.912 +		return;
   1.913 +	}
   1.914 +	if(!getclient(ev->window))
   1.915 +		manage(ev->window, &wa);
   1.916 +}
   1.917 +
   1.918 +static void
   1.919 +propertynotify(XEvent *e) {
   1.920 +	Client *c;
   1.921 +	Window trans;
   1.922 +	XPropertyEvent *ev = &e->xproperty;
   1.923 +
   1.924 +	if(ev->state == PropertyDelete)
   1.925 +		return; /* ignore */
   1.926 +	if((c = getclient(ev->window))) {
   1.927 +		switch (ev->atom) {
   1.928 +			default: break;
   1.929 +			case XA_WM_TRANSIENT_FOR:
   1.930 +				XGetTransientForHint(dpy, c->win, &trans);
   1.931 +				if(!c->isfloat && (c->isfloat = (trans != 0)))
   1.932 +					arrange();
   1.933 +				break;
   1.934 +			case XA_WM_NORMAL_HINTS:
   1.935 +				updatesizehints(c);
   1.936 +				break;
   1.937 +		}
   1.938 +		if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
   1.939 +			updatetitle(c);
   1.940 +			if(c == sel)
   1.941 +				drawstatus();
   1.942 +		}
   1.943 +	}
   1.944 +}
   1.945 +
   1.946 +static void
   1.947 +unmapnotify(XEvent *e) {
   1.948 +	Client *c;
   1.949 +	XUnmapEvent *ev = &e->xunmap;
   1.950 +
   1.951 +	if((c = getclient(ev->window)))
   1.952 +		unmanage(c);
   1.953 +}
   1.954 +
   1.955 +
   1.956 +
   1.957 +void (*handler[LASTEvent]) (XEvent *) = {
   1.958 +	[ButtonPress] = buttonpress,
   1.959 +	[ConfigureRequest] = configurerequest,
   1.960 +	[DestroyNotify] = destroynotify,
   1.961 +	[EnterNotify] = enternotify,
   1.962 +	[LeaveNotify] = leavenotify,
   1.963 +	[Expose] = expose,
   1.964 +	[KeyPress] = keypress,
   1.965 +	[MappingNotify] = mappingnotify,
   1.966 +	[MapRequest] = maprequest,
   1.967 +	[PropertyNotify] = propertynotify,
   1.968 +	[UnmapNotify] = unmapnotify
   1.969 +};
   1.970 +
   1.971 +void
   1.972 +grabkeys(void) {
   1.973 +	static unsigned int len = sizeof key / sizeof key[0];
   1.974 +	unsigned int i;
   1.975 +	KeyCode code;
   1.976 +
   1.977 +	XUngrabKey(dpy, AnyKey, AnyModifier, root);
   1.978 +	for(i = 0; i < len; i++) {
   1.979 +		code = XKeysymToKeycode(dpy, key[i].keysym);
   1.980 +		XGrabKey(dpy, code, key[i].mod, root, True,
   1.981 +				GrabModeAsync, GrabModeAsync);
   1.982 +		XGrabKey(dpy, code, key[i].mod | LockMask, root, True,
   1.983 +				GrabModeAsync, GrabModeAsync);
   1.984 +		XGrabKey(dpy, code, key[i].mod | numlockmask, root, True,
   1.985 +				GrabModeAsync, GrabModeAsync);
   1.986 +		XGrabKey(dpy, code, key[i].mod | numlockmask | LockMask, root, True,
   1.987 +				GrabModeAsync, GrabModeAsync);
   1.988 +	}
   1.989 +}
   1.990 +
   1.991 +void
   1.992 +procevent(void) {
   1.993 +	XEvent ev;
   1.994 +
   1.995 +	while(XPending(dpy)) {
   1.996 +		XNextEvent(dpy, &ev);
   1.997 +		if(handler[ev.type])
   1.998 +			(handler[ev.type])(&ev); /* call handler */
   1.999 +	}
  1.1000 +}
  1.1001 +
  1.1002 +
  1.1003 +
  1.1004 +
  1.1005 +
  1.1006 +
  1.1007 +
  1.1008 +
  1.1009 +
  1.1010 +
  1.1011 +
  1.1012 +
  1.1013 +
  1.1014 +
  1.1015 +
  1.1016 +/* from draw.c */
  1.1017 +/* static */
  1.1018 +
  1.1019 +static unsigned int
  1.1020 +textnw(const char *text, unsigned int len) {
  1.1021 +	XRectangle r;
  1.1022 +
  1.1023 +	if(dc.font.set) {
  1.1024 +		XmbTextExtents(dc.font.set, text, len, NULL, &r);
  1.1025 +		return r.width;
  1.1026 +	}
  1.1027 +	return XTextWidth(dc.font.xfont, text, len);
  1.1028 +}
  1.1029 +
  1.1030 +static void
  1.1031 +drawtext(const char *text, unsigned long col[ColLast]) {
  1.1032 +	int x, y, w, h;
  1.1033 +	static char buf[256];
  1.1034 +	unsigned int len, olen;
  1.1035 +	XGCValues gcv;
  1.1036 +	XRectangle r = { dc.x, dc.y, dc.w, dc.h };
  1.1037 +
  1.1038 +	XSetForeground(dpy, dc.gc, col[ColBG]);
  1.1039 +	XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
  1.1040 +	if(!text)
  1.1041 +		return;
  1.1042 +	w = 0;
  1.1043 +	olen = len = strlen(text);
  1.1044 +	if(len >= sizeof buf)
  1.1045 +		len = sizeof buf - 1;
  1.1046 +	memcpy(buf, text, len);
  1.1047 +	buf[len] = 0;
  1.1048 +	h = dc.font.ascent + dc.font.descent;
  1.1049 +	y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
  1.1050 +	x = dc.x + (h / 2);
  1.1051 +	/* shorten text if necessary */
  1.1052 +	while(len && (w = textnw(buf, len)) > dc.w - h)
  1.1053 +		buf[--len] = 0;
  1.1054 +	if(len < olen) {
  1.1055 +		if(len > 1)
  1.1056 +			buf[len - 1] = '.';
  1.1057 +		if(len > 2)
  1.1058 +			buf[len - 2] = '.';
  1.1059 +		if(len > 3)
  1.1060 +			buf[len - 3] = '.';
  1.1061 +	}
  1.1062 +	if(w > dc.w)
  1.1063 +		return; /* too long */
  1.1064 +	gcv.foreground = col[ColFG];
  1.1065 +	if(dc.font.set) {
  1.1066 +		XChangeGC(dpy, dc.gc, GCForeground, &gcv);
  1.1067 +		XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
  1.1068 +	} else {
  1.1069 +		gcv.font = dc.font.xfont->fid;
  1.1070 +		XChangeGC(dpy, dc.gc, GCForeground | GCFont, &gcv);
  1.1071 +		XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
  1.1072 +	}
  1.1073 +}
  1.1074 +
  1.1075 +
  1.1076 +
  1.1077 +void
  1.1078 +drawstatus(void) {
  1.1079 +	int x;
  1.1080 +	unsigned int i;
  1.1081 +
  1.1082 +	dc.x = dc.y = 0;
  1.1083 +	for(i = 0; i < ntags; i++) {
  1.1084 +		dc.w = textw(tags[i]);
  1.1085 +		drawtext(tags[i], ( ((i == 0 && seltag) || (i == 1 && !seltag)) ? dc.sel : dc.norm));
  1.1086 +		dc.x += dc.w + 1;
  1.1087 +	}
  1.1088 +	dc.w = bmw;
  1.1089 +	drawtext("", dc.norm);
  1.1090 +	x = dc.x + dc.w;
  1.1091 +	dc.w = textw(stext);
  1.1092 +	dc.x = sw - dc.w;
  1.1093 +	if(dc.x < x) {
  1.1094 +		dc.x = x;
  1.1095 +		dc.w = sw - x;
  1.1096 +	}
  1.1097 +	drawtext(stext, dc.norm);
  1.1098 +	if((dc.w = dc.x - x) > bh) {
  1.1099 +		dc.x = x;
  1.1100 +		drawtext(sel ? sel->name : NULL, dc.norm);
  1.1101 +	}
  1.1102 +	XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, sw, bh, 0, 0);
  1.1103 +	XSync(dpy, False);
  1.1104 +}
  1.1105 +
  1.1106 +unsigned long
  1.1107 +getcolor(const char *colstr) {
  1.1108 +	Colormap cmap = DefaultColormap(dpy, screen);
  1.1109 +	XColor color;
  1.1110 +
  1.1111 +	if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
  1.1112 +		eprint("error, cannot allocate color '%s'\n", colstr);
  1.1113 +	return color.pixel;
  1.1114 +}
  1.1115 +
  1.1116 +void
  1.1117 +setfont(const char *fontstr) {
  1.1118 +	char *def, **missing;
  1.1119 +	int i, n;
  1.1120 +
  1.1121 +	missing = NULL;
  1.1122 +	if(dc.font.set)
  1.1123 +		XFreeFontSet(dpy, dc.font.set);
  1.1124 +	dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
  1.1125 +	if(missing) {
  1.1126 +		while(n--)
  1.1127 +			fprintf(stderr, "missing fontset: %s\n", missing[n]);
  1.1128 +		XFreeStringList(missing);
  1.1129 +	}
  1.1130 +	if(dc.font.set) {
  1.1131 +		XFontSetExtents *font_extents;
  1.1132 +		XFontStruct **xfonts;
  1.1133 +		char **font_names;
  1.1134 +		dc.font.ascent = dc.font.descent = 0;
  1.1135 +		font_extents = XExtentsOfFontSet(dc.font.set);
  1.1136 +		n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
  1.1137 +		for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
  1.1138 +			if(dc.font.ascent < (*xfonts)->ascent)
  1.1139 +				dc.font.ascent = (*xfonts)->ascent;
  1.1140 +			if(dc.font.descent < (*xfonts)->descent)
  1.1141 +				dc.font.descent = (*xfonts)->descent;
  1.1142 +			xfonts++;
  1.1143 +		}
  1.1144 +	} else {
  1.1145 +		if(dc.font.xfont)
  1.1146 +			XFreeFont(dpy, dc.font.xfont);
  1.1147 +		dc.font.xfont = NULL;
  1.1148 +		if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr)))
  1.1149 +			eprint("error, cannot load font: '%s'\n", fontstr);
  1.1150 +		dc.font.ascent = dc.font.xfont->ascent;
  1.1151 +		dc.font.descent = dc.font.xfont->descent;
  1.1152 +	}
  1.1153 +	dc.font.height = dc.font.ascent + dc.font.descent;
  1.1154 +}
  1.1155 +
  1.1156 +unsigned int
  1.1157 +textw(const char *text) {
  1.1158 +	return textnw(text, strlen(text)) + dc.font.height;
  1.1159 +}
  1.1160 +
  1.1161 +
  1.1162 +
  1.1163 +
  1.1164 +
  1.1165 +
  1.1166 +
  1.1167 +
  1.1168 +
  1.1169 +
  1.1170 +
  1.1171 +/* from client.c */
  1.1172 +/* static */
  1.1173 +
  1.1174 +static void
  1.1175 +detachstack(Client *c) {
  1.1176 +	Client **tc;
  1.1177 +	for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
  1.1178 +	*tc = c->snext;
  1.1179 +}
  1.1180 +
  1.1181 +static void
  1.1182 +grabbuttons(Client *c, Bool focused) {
  1.1183 +	XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
  1.1184 +
  1.1185 +	if(focused) {
  1.1186 +		XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
  1.1187 +				GrabModeAsync, GrabModeSync, None, None);
  1.1188 +		XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
  1.1189 +				GrabModeAsync, GrabModeSync, None, None);
  1.1190 +		XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  1.1191 +				GrabModeAsync, GrabModeSync, None, None);
  1.1192 +		XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  1.1193 +				GrabModeAsync, GrabModeSync, None, None);
  1.1194 +
  1.1195 +		XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
  1.1196 +				GrabModeAsync, GrabModeSync, None, None);
  1.1197 +		XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
  1.1198 +				GrabModeAsync, GrabModeSync, None, None);
  1.1199 +		XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  1.1200 +				GrabModeAsync, GrabModeSync, None, None);
  1.1201 +		XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  1.1202 +				GrabModeAsync, GrabModeSync, None, None);
  1.1203 +
  1.1204 +		XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
  1.1205 +				GrabModeAsync, GrabModeSync, None, None);
  1.1206 +		XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
  1.1207 +				GrabModeAsync, GrabModeSync, None, None);
  1.1208 +		XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  1.1209 +				GrabModeAsync, GrabModeSync, None, None);
  1.1210 +		XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  1.1211 +				GrabModeAsync, GrabModeSync, None, None);
  1.1212 +	} else {
  1.1213 +		XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
  1.1214 +				GrabModeAsync, GrabModeSync, None, None);
  1.1215 +	}
  1.1216 +}
  1.1217 +
  1.1218 +static void
  1.1219 +setclientstate(Client *c, long state) {
  1.1220 +	long data[] = {state, None};
  1.1221 +	XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
  1.1222 +			PropModeReplace, (unsigned char *)data, 2);
  1.1223 +}
  1.1224 +
  1.1225 +static int
  1.1226 +xerrordummy(Display *dsply, XErrorEvent *ee) {
  1.1227 +	return 0;
  1.1228 +}
  1.1229 +
  1.1230 +
  1.1231 +
  1.1232 +void
  1.1233 +configure(Client *c) {
  1.1234 +	XEvent synev;
  1.1235 +
  1.1236 +	synev.type = ConfigureNotify;
  1.1237 +	synev.xconfigure.display = dpy;
  1.1238 +	synev.xconfigure.event = c->win;
  1.1239 +	synev.xconfigure.window = c->win;
  1.1240 +	synev.xconfigure.x = c->x;
  1.1241 +	synev.xconfigure.y = c->y;
  1.1242 +	synev.xconfigure.width = c->w;
  1.1243 +	synev.xconfigure.height = c->h;
  1.1244 +	synev.xconfigure.border_width = c->border;
  1.1245 +	synev.xconfigure.above = None;
  1.1246 +	XSendEvent(dpy, c->win, True, NoEventMask, &synev);
  1.1247 +}
  1.1248 +
  1.1249 +void
  1.1250 +focus(Client *c) {
  1.1251 +	if(c && !isvisible(c))
  1.1252 +		return;
  1.1253 +	if(sel && sel != c) {
  1.1254 +		grabbuttons(sel, False);
  1.1255 +		XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
  1.1256 +	}
  1.1257 +	if(c) {
  1.1258 +		detachstack(c);
  1.1259 +		c->snext = stack;
  1.1260 +		stack = c;
  1.1261 +		grabbuttons(c, True);
  1.1262 +	}
  1.1263 +	sel = c;
  1.1264 +	drawstatus();
  1.1265 +	if(!selscreen)
  1.1266 +		return;
  1.1267 +	if(c) {
  1.1268 +		XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
  1.1269 +		XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
  1.1270 +	} else {
  1.1271 +		XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
  1.1272 +	}
  1.1273 +}
  1.1274 +
  1.1275 +Client *
  1.1276 +getclient(Window w) {
  1.1277 +	Client *c;
  1.1278 +
  1.1279 +	for(c = clients; c; c = c->next) {
  1.1280 +		if(c->win == w) {
  1.1281 +			return c;
  1.1282 +		}
  1.1283 +	}
  1.1284 +	return NULL;
  1.1285 +}
  1.1286 +
  1.1287 +Bool
  1.1288 +isprotodel(Client *c) {
  1.1289 +	int i, n;
  1.1290 +	Atom *protocols;
  1.1291 +	Bool ret = False;
  1.1292 +
  1.1293 +	if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
  1.1294 +		for(i = 0; !ret && i < n; i++)
  1.1295 +			if(protocols[i] == wmatom[WMDelete])
  1.1296 +				ret = True;
  1.1297 +		XFree(protocols);
  1.1298 +	}
  1.1299 +	return ret;
  1.1300 +}
  1.1301 +
  1.1302 +void
  1.1303 +killclient() {
  1.1304 +	if(!sel)
  1.1305 +		return;
  1.1306 +	if(isprotodel(sel))
  1.1307 +		sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
  1.1308 +	else
  1.1309 +		XKillClient(dpy, sel->win);
  1.1310 +}
  1.1311 +
  1.1312 +void
  1.1313 +manage(Window w, XWindowAttributes *wa) {
  1.1314 +	Client *c;
  1.1315 +	Window trans;
  1.1316 +
  1.1317 +	c = emallocz(sizeof(Client));
  1.1318 +	c->tag = True;
  1.1319 +	c->win = w;
  1.1320 +	c->x = wa->x;
  1.1321 +	c->y = wa->y;
  1.1322 +	c->w = wa->width;
  1.1323 +	c->h = wa->height;
  1.1324 +	if(c->w == sw && c->h == sh) {
  1.1325 +		c->border = 0;
  1.1326 +		c->x = sx;
  1.1327 +		c->y = sy;
  1.1328 +	} else {
  1.1329 +		c->border = BORDERPX;
  1.1330 +		if(c->x + c->w + 2 * c->border > wax + waw)
  1.1331 +			c->x = wax + waw - c->w - 2 * c->border;
  1.1332 +		if(c->y + c->h + 2 * c->border > way + wah)
  1.1333 +			c->y = way + wah - c->h - 2 * c->border;
  1.1334 +		if(c->x < wax)
  1.1335 +			c->x = wax;
  1.1336 +		if(c->y < way)
  1.1337 +			c->y = way;
  1.1338 +	}
  1.1339 +	updatesizehints(c);
  1.1340 +	XSelectInput(dpy, c->win,
  1.1341 +		StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
  1.1342 +	XGetTransientForHint(dpy, c->win, &trans);
  1.1343 +	grabbuttons(c, False);
  1.1344 +	XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
  1.1345 +	updatetitle(c);
  1.1346 +	settags(c, getclient(trans));
  1.1347 +	if(!c->isfloat)
  1.1348 +		c->isfloat = trans || c->isfixed;
  1.1349 +	if(clients)
  1.1350 +		clients->prev = c;
  1.1351 +	c->next = clients;
  1.1352 +	c->snext = stack;
  1.1353 +	stack = clients = c;
  1.1354 +	XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
  1.1355 +	XMapWindow(dpy, c->win);
  1.1356 +	setclientstate(c, NormalState);
  1.1357 +	if(isvisible(c))
  1.1358 +		focus(c);
  1.1359 +	arrange();
  1.1360 +}
  1.1361 +
  1.1362 +void
  1.1363 +resize(Client *c, Bool sizehints) {
  1.1364 +	float actual, dx, dy, max, min;
  1.1365 +	XWindowChanges wc;
  1.1366 +
  1.1367 +	if(c->w <= 0 || c->h <= 0)
  1.1368 +		return;
  1.1369 +	if(sizehints) {
  1.1370 +		if(c->minw && c->w < c->minw)
  1.1371 +			c->w = c->minw;
  1.1372 +		if(c->minh && c->h < c->minh)
  1.1373 +			c->h = c->minh;
  1.1374 +		if(c->maxw && c->w > c->maxw)
  1.1375 +			c->w = c->maxw;
  1.1376 +		if(c->maxh && c->h > c->maxh)
  1.1377 +			c->h = c->maxh;
  1.1378 +		/* inspired by algorithm from fluxbox */
  1.1379 +		if(c->minay > 0 && c->maxay && (c->h - c->baseh) > 0) {
  1.1380 +			dx = (float)(c->w - c->basew);
  1.1381 +			dy = (float)(c->h - c->baseh);
  1.1382 +			min = (float)(c->minax) / (float)(c->minay);
  1.1383 +			max = (float)(c->maxax) / (float)(c->maxay);
  1.1384 +			actual = dx / dy;
  1.1385 +			if(max > 0 && min > 0 && actual > 0) {
  1.1386 +				if(actual < min) {
  1.1387 +					dy = (dx * min + dy) / (min * min + 1);
  1.1388 +					dx = dy * min;
  1.1389 +					c->w = (int)dx + c->basew;
  1.1390 +					c->h = (int)dy + c->baseh;
  1.1391 +				}
  1.1392 +				else if(actual > max) {
  1.1393 +					dy = (dx * min + dy) / (max * max + 1);
  1.1394 +					dx = dy * min;
  1.1395 +					c->w = (int)dx + c->basew;
  1.1396 +					c->h = (int)dy + c->baseh;
  1.1397 +				}
  1.1398 +			}
  1.1399 +		}
  1.1400 +		if(c->incw)
  1.1401 +			c->w -= (c->w - c->basew) % c->incw;
  1.1402 +		if(c->inch)
  1.1403 +			c->h -= (c->h - c->baseh) % c->inch;
  1.1404 +	}
  1.1405 +	if(c->w == sw && c->h == sh)
  1.1406 +		c->border = 0;
  1.1407 +	else
  1.1408 +		c->border = BORDERPX;
  1.1409 +	/* offscreen appearance fixes */
  1.1410 +	if(c->x > sw)
  1.1411 +		c->x = sw - c->w - 2 * c->border;
  1.1412 +	if(c->y > sh)
  1.1413 +		c->y = sh - c->h - 2 * c->border;
  1.1414 +	if(c->x + c->w + 2 * c->border < sx)
  1.1415 +		c->x = sx;
  1.1416 +	if(c->y + c->h + 2 * c->border < sy)
  1.1417 +		c->y = sy;
  1.1418 +	wc.x = c->x;
  1.1419 +	wc.y = c->y;
  1.1420 +	wc.width = c->w;
  1.1421 +	wc.height = c->h;
  1.1422 +	wc.border_width = c->border;
  1.1423 +	XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
  1.1424 +	configure(c);
  1.1425 +	XSync(dpy, False);
  1.1426 +}
  1.1427 +
  1.1428 +void
  1.1429 +updatesizehints(Client *c) {
  1.1430 +	long msize;
  1.1431 +	XSizeHints size;
  1.1432 +
  1.1433 +	if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
  1.1434 +		size.flags = PSize;
  1.1435 +	c->flags = size.flags;
  1.1436 +	if(c->flags & PBaseSize) {
  1.1437 +		c->basew = size.base_width;
  1.1438 +		c->baseh = size.base_height;
  1.1439 +	} else {
  1.1440 +		c->basew = c->baseh = 0;
  1.1441 +	}
  1.1442 +	if(c->flags & PResizeInc) {
  1.1443 +		c->incw = size.width_inc;
  1.1444 +		c->inch = size.height_inc;
  1.1445 +	} else {
  1.1446 +		c->incw = c->inch = 0;
  1.1447 +	}
  1.1448 +	if(c->flags & PMaxSize) {
  1.1449 +		c->maxw = size.max_width;
  1.1450 +		c->maxh = size.max_height;
  1.1451 +	} else {
  1.1452 +		c->maxw = c->maxh = 0;
  1.1453 +	}
  1.1454 +	if(c->flags & PMinSize) {
  1.1455 +		c->minw = size.min_width;
  1.1456 +		c->minh = size.min_height;
  1.1457 +	} else {
  1.1458 +		c->minw = c->minh = 0;
  1.1459 +	}
  1.1460 +	if(c->flags & PAspect) {
  1.1461 +		c->minax = size.min_aspect.x;
  1.1462 +		c->minay = size.min_aspect.y;
  1.1463 +		c->maxax = size.max_aspect.x;
  1.1464 +		c->maxay = size.max_aspect.y;
  1.1465 +	} else {
  1.1466 +		c->minax = c->minay = c->maxax = c->maxay = 0;
  1.1467 +	}
  1.1468 +	c->isfixed = (c->maxw && c->minw && c->maxh && c->minh &&
  1.1469 +				c->maxw == c->minw && c->maxh == c->minh);
  1.1470 +}
  1.1471 +
  1.1472 +void
  1.1473 +updatetitle(Client *c) {
  1.1474 +	char **list = NULL;
  1.1475 +	int n;
  1.1476 +	XTextProperty name;
  1.1477 +
  1.1478 +	name.nitems = 0;
  1.1479 +	c->name[0] = 0;
  1.1480 +	XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
  1.1481 +	if(!name.nitems)
  1.1482 +		XGetWMName(dpy, c->win, &name);
  1.1483 +	if(!name.nitems)
  1.1484 +		return;
  1.1485 +	if(name.encoding == XA_STRING)
  1.1486 +		strncpy(c->name, (char *)name.value, sizeof c->name);
  1.1487 +	else {
  1.1488 +		if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
  1.1489 +			strncpy(c->name, *list, sizeof c->name);
  1.1490 +			XFreeStringList(list);
  1.1491 +		}
  1.1492 +	}
  1.1493 +	XFree(name.value);
  1.1494 +}
  1.1495 +
  1.1496 +void
  1.1497 +unmanage(Client *c) {
  1.1498 +	Client *nc;
  1.1499 +
  1.1500 +	/* The server grab construct avoids race conditions. */
  1.1501 +	XGrabServer(dpy);
  1.1502 +	XSetErrorHandler(xerrordummy);
  1.1503 +	detach(c);
  1.1504 +	detachstack(c);
  1.1505 +	if(sel == c) {
  1.1506 +		for(nc = stack; nc && !isvisible(nc); nc = nc->snext);
  1.1507 +		focus(nc);
  1.1508 +	}
  1.1509 +	XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
  1.1510 +	setclientstate(c, WithdrawnState);
  1.1511 +	free(c);
  1.1512 +	XSync(dpy, False);
  1.1513 +	XSetErrorHandler(xerror);
  1.1514 +	XUngrabServer(dpy);
  1.1515 +	arrange();
  1.1516 +}
  1.1517 +
  1.1518 +
  1.1519 +
  1.1520 +
  1.1521 +
  1.1522 +
  1.1523 +
  1.1524 +
  1.1525 +
  1.1526 +
  1.1527 +
  1.1528 +
  1.1529 +
  1.1530 +
  1.1531 +
  1.1532 +
  1.1533 +
  1.1534 +
  1.1535 +
  1.1536 +/* static */
  1.1537 +
  1.1538 +
  1.1539 +static void
  1.1540 +cleanup(void) {
  1.1541 +	close(STDIN_FILENO);
  1.1542 +	while(stack) {
  1.1543 +		resize(stack, True);
  1.1544 +		unmanage(stack);
  1.1545 +	}
  1.1546 +	if(dc.font.set)
  1.1547 +		XFreeFontSet(dpy, dc.font.set);
  1.1548 +	else
  1.1549 +		XFreeFont(dpy, dc.font.xfont);
  1.1550 +	XUngrabKey(dpy, AnyKey, AnyModifier, root);
  1.1551 +	XFreePixmap(dpy, dc.drawable);
  1.1552 +	XFreeGC(dpy, dc.gc);
  1.1553 +	XDestroyWindow(dpy, barwin);
  1.1554 +	XFreeCursor(dpy, cursor[CurNormal]);
  1.1555 +	XFreeCursor(dpy, cursor[CurResize]);
  1.1556 +	XFreeCursor(dpy, cursor[CurMove]);
  1.1557 +	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
  1.1558 +	XSync(dpy, False);
  1.1559 +}
  1.1560 +
  1.1561 +static void
  1.1562 +scan(void) {
  1.1563 +	unsigned int i, num;
  1.1564 +	Window *wins, d1, d2;
  1.1565 +	XWindowAttributes wa;
  1.1566 +
  1.1567 +	wins = NULL;
  1.1568 +	if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
  1.1569 +		for(i = 0; i < num; i++) {
  1.1570 +			if(!XGetWindowAttributes(dpy, wins[i], &wa))
  1.1571 +				continue;
  1.1572 +			if(wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
  1.1573 +				continue;
  1.1574 +			if(wa.map_state == IsViewable)
  1.1575 +				manage(wins[i], &wa);
  1.1576 +		}
  1.1577 +	}
  1.1578 +	if(wins)
  1.1579 +		XFree(wins);
  1.1580 +}
  1.1581 +
  1.1582 +static void
  1.1583 +setup(void) {
  1.1584 +	int i, j;
  1.1585 +	unsigned int mask;
  1.1586 +	Window w;
  1.1587 +	XModifierKeymap *modmap;
  1.1588 +	XSetWindowAttributes wa;
  1.1589 +
  1.1590 +	/* init atoms */
  1.1591 +	wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
  1.1592 +	wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
  1.1593 +	wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
  1.1594 +	netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
  1.1595 +	netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
  1.1596 +	XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
  1.1597 +			PropModeReplace, (unsigned char *) netatom, NetLast);
  1.1598 +	/* init cursors */
  1.1599 +	cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
  1.1600 +	cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
  1.1601 +	cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
  1.1602 +	/* init modifier map */
  1.1603 +	numlockmask = 0;
  1.1604 +	modmap = XGetModifierMapping(dpy);
  1.1605 +	for (i = 0; i < 8; i++) {
  1.1606 +		for (j = 0; j < modmap->max_keypermod; j++) {
  1.1607 +			if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
  1.1608 +				numlockmask = (1 << i);
  1.1609 +		}
  1.1610 +	}
  1.1611 +	XFreeModifiermap(modmap);
  1.1612 +	/* select for events */
  1.1613 +	wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
  1.1614 +		| EnterWindowMask | LeaveWindowMask;
  1.1615 +	wa.cursor = cursor[CurNormal];
  1.1616 +	XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
  1.1617 +	grabkeys();
  1.1618 +	initrregs();
  1.1619 +	ntags = 2;
  1.1620 +	seltag = True;
  1.1621 +	/* style */
  1.1622 +	dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
  1.1623 +	dc.norm[ColBG] = getcolor(NORMBGCOLOR);
  1.1624 +	dc.norm[ColFG] = getcolor(NORMFGCOLOR);
  1.1625 +	dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
  1.1626 +	dc.sel[ColBG] = getcolor(SELBGCOLOR);
  1.1627 +	dc.sel[ColFG] = getcolor(SELFGCOLOR);
  1.1628 +	setfont(FONT);
  1.1629 +	/* geometry */
  1.1630 +	sx = sy = 0;
  1.1631 +	sw = DisplayWidth(dpy, screen);
  1.1632 +	sh = DisplayHeight(dpy, screen);
  1.1633 +	nmaster = NMASTER;
  1.1634 +	bmw = 1;
  1.1635 +	/* bar */
  1.1636 +	dc.h = bh = dc.font.height + 2;
  1.1637 +	wa.override_redirect = 1;
  1.1638 +	wa.background_pixmap = ParentRelative;
  1.1639 +	wa.event_mask = ButtonPressMask | ExposureMask;
  1.1640 +	barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0,
  1.1641 +			DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
  1.1642 +			CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
  1.1643 +	XDefineCursor(dpy, barwin, cursor[CurNormal]);
  1.1644 +	XMapRaised(dpy, barwin);
  1.1645 +	strcpy(stext, "dwm-"VERSION);
  1.1646 +	/* windowarea */
  1.1647 +	wax = sx;
  1.1648 +	way = sy + bh;
  1.1649 +	wah = sh - bh;
  1.1650 +	waw = sw;
  1.1651 +	/* pixmap for everything */
  1.1652 +	dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
  1.1653 +	dc.gc = XCreateGC(dpy, root, 0, 0);
  1.1654 +	XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
  1.1655 +	/* multihead support */
  1.1656 +	selscreen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
  1.1657 +}
  1.1658 +
  1.1659 +/*
  1.1660 + * Startup Error handler to check if another window manager
  1.1661 + * is already running.
  1.1662 + */
  1.1663 +static int
  1.1664 +xerrorstart(Display *dsply, XErrorEvent *ee) {
  1.1665 +	otherwm = True;
  1.1666 +	return -1;
  1.1667 +}
  1.1668 +
  1.1669 +
  1.1670 +
  1.1671 +void
  1.1672 +sendevent(Window w, Atom a, long value) {
  1.1673 +	XEvent e;
  1.1674 +
  1.1675 +	e.type = ClientMessage;
  1.1676 +	e.xclient.window = w;
  1.1677 +	e.xclient.message_type = a;
  1.1678 +	e.xclient.format = 32;
  1.1679 +	e.xclient.data.l[0] = value;
  1.1680 +	e.xclient.data.l[1] = CurrentTime;
  1.1681 +	XSendEvent(dpy, w, False, NoEventMask, &e);
  1.1682 +	XSync(dpy, False);
  1.1683 +}
  1.1684 +
  1.1685 +void
  1.1686 +quit() {
  1.1687 +	readin = running = False;
  1.1688 +}
  1.1689 +
  1.1690 +/* There's no way to check accesses to destroyed windows, thus those cases are
  1.1691 + * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
  1.1692 + * default error handler, which may call exit.
  1.1693 + */
  1.1694 +int
  1.1695 +xerror(Display *dpy, XErrorEvent *ee) {
  1.1696 +	if(ee->error_code == BadWindow
  1.1697 +	|| (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
  1.1698 +	|| (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
  1.1699 +	|| (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
  1.1700 +	|| (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
  1.1701 +	|| (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
  1.1702 +	|| (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
  1.1703 +	|| (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
  1.1704 +		return 0;
  1.1705 +	fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
  1.1706 +		ee->request_code, ee->error_code);
  1.1707 +	return xerrorxlib(dpy, ee); /* may call exit */
  1.1708 +}
  1.1709 +
  1.1710 +int
  1.1711 +main(int argc, char *argv[]) {
  1.1712 +	char *p;
  1.1713 +	int r, xfd;
  1.1714 +	fd_set rd;
  1.1715 +
  1.1716 +	if(argc == 2 && !strncmp("-v", argv[1], 3)) {
  1.1717 +		fputs("dwm-"VERSION", (C)opyright MMVI-MMVII Anselm R. Garbe\n", stdout);
  1.1718 +		exit(EXIT_SUCCESS);
  1.1719 +	} else if(argc != 1) {
  1.1720 +		eprint("usage: dwm [-v]\n");
  1.1721 +	}
  1.1722 +	setlocale(LC_CTYPE, "");
  1.1723 +	dpy = XOpenDisplay(0);
  1.1724 +	if(!dpy) {
  1.1725 +		eprint("dwm: cannot open display\n");
  1.1726 +	}
  1.1727 +	xfd = ConnectionNumber(dpy);
  1.1728 +	screen = DefaultScreen(dpy);
  1.1729 +	root = RootWindow(dpy, screen);
  1.1730 +	otherwm = False;
  1.1731 +	XSetErrorHandler(xerrorstart);
  1.1732 +	/* this causes an error if some other window manager is running */
  1.1733 +	XSelectInput(dpy, root, SubstructureRedirectMask);
  1.1734 +	XSync(dpy, False);
  1.1735 +	if(otherwm) {
  1.1736 +		eprint("dwm: another window manager is already running\n");
  1.1737 +	}
  1.1738 +
  1.1739 +	XSync(dpy, False);
  1.1740 +	XSetErrorHandler(NULL);
  1.1741 +	xerrorxlib = XSetErrorHandler(xerror);
  1.1742 +	XSync(dpy, False);
  1.1743 +	setup();
  1.1744 +	drawstatus();
  1.1745 +	scan();
  1.1746 +
  1.1747 +	/* main event loop, also reads status text from stdin */
  1.1748 +	XSync(dpy, False);
  1.1749 +	procevent();
  1.1750 +	readin = True;
  1.1751 +	while(running) {
  1.1752 +		FD_ZERO(&rd);
  1.1753 +		if(readin)
  1.1754 +			FD_SET(STDIN_FILENO, &rd);
  1.1755 +		FD_SET(xfd, &rd);
  1.1756 +		if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
  1.1757 +			if(errno == EINTR)
  1.1758 +				continue;
  1.1759 +			eprint("select failed\n");
  1.1760 +		}
  1.1761 +		if(FD_ISSET(STDIN_FILENO, &rd)) {
  1.1762 +			switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
  1.1763 +			case -1:
  1.1764 +				strncpy(stext, strerror(errno), sizeof stext - 1);
  1.1765 +				stext[sizeof stext - 1] = '\0';
  1.1766 +				readin = False;
  1.1767 +				break;
  1.1768 +			case 0:
  1.1769 +				strncpy(stext, "EOF", 4);
  1.1770 +				readin = False;
  1.1771 +				break;
  1.1772 +			default:
  1.1773 +				for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
  1.1774 +				for(; p >= stext && *p != '\n'; --p);
  1.1775 +				if(p > stext)
  1.1776 +					strncpy(stext, p + 1, sizeof stext);
  1.1777 +			}
  1.1778 +			drawstatus();
  1.1779 +		}
  1.1780 +		if(FD_ISSET(xfd, &rd))
  1.1781 +			procevent();
  1.1782 +	}
  1.1783 +	cleanup();
  1.1784 +	XCloseDisplay(dpy);
  1.1785 +	return 0;
  1.1786 +}