1/* See LICENSE file for copyright and license details.
   2 *
   3 * dynamic window manager is designed like any other X client as well. It is
   4 * driven through handling X events. In contrast to other X clients, a window
   5 * manager selects for SubstructureRedirectMask on the root window, to receive
   6 * events about window (dis-)appearance.  Only one X connection at a time is
   7 * allowed to select for this event mask.
   8 *
   9 * Calls to fetch an X event from the event queue are blocking.  Due reading
  10 * status text from standard input, a select()-driven main loop has been
  11 * implemented which selects for reads on the X connection and STDIN_FILENO to
  12 * handle all data smoothly. The event handlers of dwm are organized in an
  13 * array which is accessed whenever a new event has been fetched. This allows
  14 * event dispatching in O(1) time.
  15 *
  16 * Each child of the root window is called a client, except windows which have
  17 * set the override_redirect flag.  Clients are organized in a global
  18 * doubly-linked client list, the focus history is remembered through a global
  19 * stack list. Each client contains an array of Bools of the same size as the
  20 * global tags array to indicate the tags of a client.  
  21 *
  22 * Keys and tagging rules are organized as arrays and defined in config.h.
  23 *
  24 * To understand everything else, start reading main().
  25 */
  26#include <errno.h>
  27#include <locale.h>
  28#include <stdarg.h>
  29#include <stdio.h>
  30#include <stdlib.h>
  31#include <string.h>
  32#include <unistd.h>
  33#include <sys/select.h>
  34#include <sys/types.h>
  35#include <sys/wait.h>
  36#include <regex.h>
  37#include <X11/cursorfont.h>
  38#include <X11/keysym.h>
  39#include <X11/Xatom.h>
  40#include <X11/Xlib.h>
  41#include <X11/Xproto.h>
  42#include <X11/Xutil.h>
  43//#ifdef XINERAMA
  44#include <X11/extensions/Xinerama.h>
  45//#endif
  46
  47/* macros */
  48#define BUTTONMASK		(ButtonPressMask | ButtonReleaseMask)
  49#define CLEANMASK(mask)		(mask & ~(numlockmask | LockMask))
  50#define LENGTH(x)		(sizeof x / sizeof x[0])
  51#define MAXTAGLEN		16
  52#define MOUSEMASK		(BUTTONMASK | PointerMotionMask)
  53
  54
  55/* enums */
  56enum { BarTop, BarBot, BarOff };			/* bar position */
  57enum { CurNormal, CurResize, CurMove, CurLast };	/* cursor */
  58enum { ColBorder, ColFG, ColBG, ColLast };		/* color */
  59enum { NetSupported, NetWMName, NetLast };		/* EWMH atoms */
  60enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
  61
  62/* typedefs */
  63typedef struct Client Client;
  64struct Client {
  65	char name[256];
  66	int x, y, w, h;
  67	int basew, baseh, incw, inch, maxw, maxh, minw, minh;
  68	int minax, maxax, minay, maxay;
  69	long flags;
  70	unsigned int border, oldborder;
  71	Bool isbanned, isfixed, isfloating, isurgent;
  72	Bool *tags;
  73	Client *next;
  74	Client *prev;
  75	Client *snext;
  76	Window win;
  77	int monitor;
  78};
  79
  80typedef struct {
  81	int x, y, w, h;
  82	unsigned long norm[ColLast];
  83	unsigned long sel[ColLast];
  84	Drawable drawable;
  85	GC gc;
  86	struct {
  87		int ascent;
  88		int descent;
  89		int height;
  90		XFontSet set;
  91		XFontStruct *xfont;
  92	} font;
  93} DC; /* draw context */
  94
  95typedef struct {
  96	unsigned long mod;
  97	KeySym keysym;
  98	void (*func)(const char *arg);
  99	const char *arg;
 100} Key;
 101
 102typedef struct Monitor Monitor;
 103typedef struct {
 104	const char *symbol;
 105	void (*arrange)(Monitor *);
 106} Layout;
 107
 108typedef struct {
 109	const char *prop;
 110	const char *tags;
 111	Bool isfloating;
 112	int monitor;
 113} Rule;
 114
 115typedef struct {
 116	regex_t *propregex;
 117	regex_t *tagregex;
 118} Regs;
 119
 120struct Monitor {
 121	unsigned int id;
 122	int sx, sy, sw, sh, wax, way, wah, waw;
 123	double mwfact;
 124	Bool *seltags;
 125	Bool *prevtags;
 126	Layout *layout;
 127	Window barwin;
 128};
 129
 130
 131/* function declarations */
 132void applyrules(Client *c);
 133void arrange(void);
 134void attach(Client *c);
 135void attachstack(Client *c);
 136void ban(Client *c);
 137void buttonpress(XEvent *e);
 138void checkotherwm(void);
 139void cleanup(void);
 140void compileregs(void);
 141void configure(Client *c);
 142void configurenotify(XEvent *e);
 143void configurerequest(XEvent *e);
 144void destroynotify(XEvent *e);
 145void detach(Client *c);
 146void detachstack(Client *c);
 147void drawbar(void);
 148void drawsquare(Monitor *, Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
 149void drawtext(Monitor *, const char *text, unsigned long col[ColLast], Bool invert);
 150void *emallocz(unsigned int size);
 151void enternotify(XEvent *e);
 152void eprint(const char *errstr, ...);
 153void expose(XEvent *e);
 154void floating(Monitor *m); /* default floating layout */
 155void focus(Client *c);
 156void focusin(XEvent *e);
 157void focusnext(const char *arg);
 158void focusprev(const char *arg);
 159Client *getclient(Window w);
 160unsigned long getcolor(const char *colstr);
 161long getstate(Window w);
 162Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
 163void grabbuttons(Client *c, Bool focused);
 164void grabkeys(void);
 165unsigned int idxoftag(const char *tag);
 166void initfont(const char *fontstr);
 167Bool isoccupied(unsigned int monitor, unsigned int t);
 168Bool isprotodel(Client *c);
 169Bool isurgent(unsigned int monitor, unsigned int t);
 170Bool isvisible(Client *c, int monitor);
 171void keypress(XEvent *e);
 172void killclient(const char *arg);
 173void manage(Window w, XWindowAttributes *wa);
 174void mappingnotify(XEvent *e);
 175void maprequest(XEvent *e);
 176void movemouse(Client *c);
 177Client *nexttiled(Client *c, int monitor);
 178void propertynotify(XEvent *e);
 179void quit(const char *arg);
 180void reapply(const char *arg);
 181void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
 182void resizemouse(Client *c);
 183void restack(void);
 184void run(void);
 185void scan(void);
 186void setclientstate(Client *c, long state);
 187void setlayout(const char *arg);
 188void setmwfact(const char *arg);
 189void setup(void);
 190void spawn(const char *arg);
 191void tag(const char *arg);
 192unsigned int textnw(const char *text, unsigned int len);
 193unsigned int textw(const char *text);
 194void tile(Monitor *m);
 195void togglebar(const char *arg);
 196void togglefloating(const char *arg);
 197void toggletag(const char *arg);
 198void toggleview(const char *arg);
 199void unban(Client *c);
 200void unmanage(Client *c);
 201void unmapnotify(XEvent *e);
 202void updatebarpos(Monitor *m);
 203void updatesizehints(Client *c);
 204void updatetitle(Client *c);
 205void updatewmhints(Client *c);
 206void view(const char *arg);
 207void viewprevtag(const char *arg);	/* views previous selected tags */
 208int xerror(Display *dpy, XErrorEvent *ee);
 209int xerrordummy(Display *dsply, XErrorEvent *ee);
 210int xerrorstart(Display *dsply, XErrorEvent *ee);
 211void zoom(const char *arg);
 212int monitorat(void);
 213void movetomonitor(const char *arg);
 214void selectmonitor(const char *arg);
 215
 216/* variables */
 217char stext[256];
 218int mcount = 1;
 219int selmonitor = 0;
 220int screen;
 221int (*xerrorxlib)(Display *, XErrorEvent *);
 222unsigned int bh, bpos;
 223unsigned int blw = 0;
 224unsigned int numlockmask = 0;
 225void (*handler[LASTEvent]) (XEvent *) = {
 226	[ButtonPress] = buttonpress,
 227	[ConfigureRequest] = configurerequest,
 228	[ConfigureNotify] = configurenotify,
 229	[DestroyNotify] = destroynotify,
 230	[EnterNotify] = enternotify,
 231	[Expose] = expose,
 232	[FocusIn] = focusin,
 233	[KeyPress] = keypress,
 234	[MappingNotify] = mappingnotify,
 235	[MapRequest] = maprequest,
 236	[PropertyNotify] = propertynotify,
 237	[UnmapNotify] = unmapnotify
 238};
 239Atom wmatom[WMLast], netatom[NetLast];
 240Bool isxinerama = False;
 241Bool domwfact = True;
 242Bool dozoom = True;
 243Bool otherwm, readin;
 244Bool running = True;
 245Client *clients = NULL;
 246Client *sel = NULL;
 247Client *stack = NULL;
 248Cursor cursor[CurLast];
 249Display *dpy;
 250DC dc = {0};
 251Regs *regs = NULL;
 252Monitor *monitors;
 253Window root;
 254
 255/* configuration, allows nested code to access above variables */
 256#include "config.h"
 257
 258//Bool prevtags[LENGTH(tags)];
 259
 260/* function implementations */
 261void
 262applyrules(Client *c) {
 263	static char buf[512];
 264	unsigned int i, j;
 265	regmatch_t tmp;
 266	Bool matched_tag = False;
 267	Bool matched_monitor = False;
 268	XClassHint ch = { 0 };
 269
 270	/* rule matching */
 271	XGetClassHint(dpy, c->win, &ch);
 272	snprintf(buf, sizeof buf, "%s:%s:%s",
 273			ch.res_class ? ch.res_class : "",
 274			ch.res_name ? ch.res_name : "", c->name);
 275	for(i = 0; i < LENGTH(rules); i++)
 276		if(regs[i].propregex && !regexec(regs[i].propregex, buf, 1, &tmp, 0)) {
 277			if (rules[i].monitor >= 0 && rules[i].monitor < mcount) {
 278				matched_monitor = True;
 279				c->monitor = rules[i].monitor;
 280			}
 281
 282			c->isfloating = rules[i].isfloating;
 283			for(j = 0; regs[i].tagregex && j < LENGTH(tags); j++) {
 284				if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
 285					matched_tag = True;
 286					c->tags[j] = True;
 287				}
 288			}
 289		}
 290	if(ch.res_class)
 291		XFree(ch.res_class);
 292	if(ch.res_name)
 293		XFree(ch.res_name);
 294	if(!matched_tag)
 295		memcpy(c->tags, monitors[monitorat()].seltags, sizeof initags);
 296	if (!matched_monitor)
 297		c->monitor = monitorat();
 298}
 299
 300void
 301arrange(void) {
 302	Client *c;
 303
 304	for(c = clients; c; c = c->next)
 305		if(isvisible(c, c->monitor))
 306			unban(c);
 307		else
 308			ban(c);
 309
 310	monitors[selmonitor].layout->arrange(&monitors[selmonitor]);
 311	focus(NULL);
 312	restack();
 313}
 314
 315void
 316attach(Client *c) {
 317	if(clients)
 318		clients->prev = c;
 319	c->next = clients;
 320	clients = c;
 321}
 322
 323void
 324attachstack(Client *c) {
 325	c->snext = stack;
 326	stack = c;
 327}
 328
 329void
 330ban(Client *c) {
 331	if(c->isbanned)
 332		return;
 333	XMoveWindow(dpy, c->win, c->x + 3 * monitors[c->monitor].sw, c->y);
 334	c->isbanned = True;
 335}
 336
 337void
 338buttonpress(XEvent *e) {
 339	unsigned int i, x;
 340	Client *c;
 341	XButtonPressedEvent *ev = &e->xbutton;
 342
 343	Monitor *m = &monitors[monitorat()];
 344
 345	if(ev->window == m->barwin) {
 346		x = 0;
 347		for(i = 0; i < LENGTH(tags); i++) {
 348			x += textw(tags[i]);
 349			if(ev->x < x) {
 350				if(ev->button == Button1) {
 351					if(ev->state & MODKEY)
 352						tag(tags[i]);
 353					else
 354						view(tags[i]);
 355				}
 356				else if(ev->button == Button3) {
 357					if(ev->state & MODKEY)
 358						toggletag(tags[i]);
 359					else
 360						toggleview(tags[i]);
 361				}
 362				return;
 363			}
 364		}
 365		if((ev->x < x + blw) && ev->button == Button1)
 366			setlayout(NULL);
 367	}
 368	else if((c = getclient(ev->window))) {
 369		focus(c);
 370		if(CLEANMASK(ev->state) != MODKEY)
 371			return;
 372		if(ev->button == Button1) {
 373			restack();
 374			movemouse(c);
 375		}
 376		else if(ev->button == Button2) {
 377			if((floating != m->layout->arrange) && c->isfloating)
 378				togglefloating(NULL);
 379			else
 380				zoom(NULL);
 381		}
 382		else if(ev->button == Button3 && !c->isfixed) {
 383			restack();
 384			resizemouse(c);
 385		}
 386	}
 387}
 388
 389void
 390checkotherwm(void) {
 391	otherwm = False;
 392	XSetErrorHandler(xerrorstart);
 393
 394	/* this causes an error if some other window manager is running */
 395	XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
 396	XSync(dpy, False);
 397	if(otherwm)
 398		eprint("dwm: another window manager is already running\n");
 399	XSync(dpy, False);
 400	XSetErrorHandler(NULL);
 401	xerrorxlib = XSetErrorHandler(xerror);
 402	XSync(dpy, False);
 403}
 404
 405void
 406cleanup(void) {
 407	unsigned int i;
 408	close(STDIN_FILENO);
 409	while(stack) {
 410		unban(stack);
 411		unmanage(stack);
 412	}
 413	if(dc.font.set)
 414		XFreeFontSet(dpy, dc.font.set);
 415	else
 416		XFreeFont(dpy, dc.font.xfont);
 417
 418	XUngrabKey(dpy, AnyKey, AnyModifier, root);
 419	XFreePixmap(dpy, dc.drawable);
 420	XFreeGC(dpy, dc.gc);
 421	XFreeCursor(dpy, cursor[CurNormal]);
 422	XFreeCursor(dpy, cursor[CurResize]);
 423	XFreeCursor(dpy, cursor[CurMove]);
 424	for(i = 0; i < mcount; i++)
 425		XDestroyWindow(dpy, monitors[i].barwin);
 426	XSync(dpy, False);
 427	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
 428}
 429
 430void
 431compileregs(void) {
 432	unsigned int i;
 433	regex_t *reg;
 434
 435	if(regs)
 436		return;
 437	regs = emallocz(LENGTH(rules) * sizeof(Regs));
 438	for(i = 0; i < LENGTH(rules); i++) {
 439		if(rules[i].prop) {
 440			reg = emallocz(sizeof(regex_t));
 441			if(regcomp(reg, rules[i].prop, REG_EXTENDED))
 442				free(reg);
 443			else
 444				regs[i].propregex = reg;
 445		}
 446		if(rules[i].tags) {
 447			reg = emallocz(sizeof(regex_t));
 448			if(regcomp(reg, rules[i].tags, REG_EXTENDED))
 449				free(reg);
 450			else
 451				regs[i].tagregex = reg;
 452		}
 453	}
 454}
 455
 456void
 457configure(Client *c) {
 458	XConfigureEvent ce;
 459
 460	ce.type = ConfigureNotify;
 461	ce.display = dpy;
 462	ce.event = c->win;
 463	ce.window = c->win;
 464	ce.x = c->x;
 465	ce.y = c->y;
 466	ce.width = c->w;
 467	ce.height = c->h;
 468	ce.border_width = c->border;
 469	ce.above = None;
 470	ce.override_redirect = False;
 471	XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
 472}
 473
 474void
 475configurenotify(XEvent *e) {
 476	XConfigureEvent *ev = &e->xconfigure;
 477	Monitor *m = &monitors[selmonitor];
 478
 479	if(ev->window == root && (ev->width != m->sw || ev->height != m->sh)) {
 480		/* TODO -- update Xinerama dimensions here */
 481		m->sw = ev->width;
 482		m->sh = ev->height;
 483		XFreePixmap(dpy, dc.drawable);
 484		dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(root, screen), bh, DefaultDepth(dpy, screen));
 485		XResizeWindow(dpy, m->barwin, m->sw, bh);
 486		updatebarpos(m);
 487		arrange();
 488	}
 489}
 490
 491void
 492configurerequest(XEvent *e) {
 493	Client *c;
 494	XConfigureRequestEvent *ev = &e->xconfigurerequest;
 495	XWindowChanges wc;
 496
 497	if((c = getclient(ev->window))) {
 498		Monitor *m = &monitors[c->monitor];
 499		if(ev->value_mask & CWBorderWidth)
 500			c->border = ev->border_width;
 501		if(c->isfixed || c->isfloating || (floating == m->layout->arrange)) {
 502			if(ev->value_mask & CWX)
 503				c->x = m->sx+ev->x;
 504			if(ev->value_mask & CWY)
 505				c->y = m->sy+ev->y;
 506			if(ev->value_mask & CWWidth)
 507				c->w = ev->width;
 508			if(ev->value_mask & CWHeight)
 509				c->h = ev->height;
 510			if((c->x - m->sx + c->w) > m->sw && c->isfloating)
 511				c->x = m->sx + (m->sw / 2 - c->w / 2); /* center in x direction */
 512			if((c->y - m->sy + c->h) > m->sh && c->isfloating)
 513				c->y = m->sy + (m->sh / 2 - c->h / 2); /* center in y direction */
 514			if((ev->value_mask & (CWX | CWY))
 515			&& !(ev->value_mask & (CWWidth | CWHeight)))
 516				configure(c);
 517			if(isvisible(c, monitorat()))
 518				XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 519		}
 520		else
 521			configure(c);
 522	}
 523	else {
 524		wc.x = ev->x;
 525		wc.y = ev->y;
 526		wc.width = ev->width;
 527		wc.height = ev->height;
 528		wc.border_width = ev->border_width;
 529		wc.sibling = ev->above;
 530		wc.stack_mode = ev->detail;
 531		XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 532	}
 533	XSync(dpy, False);
 534}
 535
 536void
 537destroynotify(XEvent *e) {
 538	Client *c;
 539	XDestroyWindowEvent *ev = &e->xdestroywindow;
 540
 541	if((c = getclient(ev->window)))
 542		unmanage(c);
 543}
 544
 545void
 546detach(Client *c) {
 547	if(c->prev)
 548		c->prev->next = c->next;
 549	if(c->next)
 550		c->next->prev = c->prev;
 551	if(c == clients)
 552		clients = c->next;
 553	c->next = c->prev = NULL;
 554}
 555
 556void
 557detachstack(Client *c) {
 558	Client **tc;
 559
 560	for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
 561	*tc = c->snext;
 562}
 563
 564void
 565drawbar(void) {
 566	int i, j, x;
 567	Client *c;
 568
 569	for(i = 0; i < mcount; i++) {
 570		Monitor *m = &monitors[i];
 571		dc.x = 0;
 572		for(c = stack; c && !isvisible(c, i); c = c->snext);
 573		fprintf(stderr, "m%d %s\n", i, c ? c->name : "NIL");
 574		for(j = 0; j < LENGTH(tags); j++) {
 575			dc.w = textw(tags[j]);
 576			if(m->seltags[j]) {
 577				drawtext(m, tags[j], dc.sel, isurgent(i, j));
 578				drawsquare(m, c && c->tags[j] && c->monitor == i,
 579						isoccupied(i, j), isurgent(i, j), dc.sel);
 580			}
 581			else {
 582				drawtext(m, tags[j], dc.norm, isurgent(i, j));
 583				drawsquare(m, c && c->tags[j] && c->monitor == i,
 584						isoccupied(i, j), isurgent(i, j), dc.norm);
 585			}
 586			dc.x += dc.w;
 587		}
 588		dc.w = blw;
 589		drawtext(m, m->layout->symbol, dc.norm, False);
 590		x = dc.x + dc.w;
 591		if(i == selmonitor) {
 592			dc.w = textw(stext);
 593			dc.x = m->sw - dc.w;
 594			if(dc.x < x) {
 595				dc.x = x;
 596				dc.w = m->sw - x;
 597			}
 598			drawtext(m, stext, dc.norm, False);
 599		}
 600		else
 601			dc.x = m->sw;
 602		if((dc.w = dc.x - x) > bh) {
 603			dc.x = x;
 604			if(c) {
 605				drawtext(m, c->name, dc.sel, False);
 606				drawsquare(m, False, c->isfloating, False, dc.sel);
 607			}
 608			else
 609				drawtext(m, NULL, dc.norm, False);
 610		}
 611		XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->sw, bh, 0, 0);
 612		XSync(dpy, False);
 613	}
 614}
 615
 616void
 617drawsquare(Monitor *m, Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
 618	int x;
 619	XGCValues gcv;
 620	XRectangle r = { dc.x, dc.y, dc.w, dc.h };
 621
 622	gcv.foreground = col[invert ? ColBG : ColFG];
 623	XChangeGC(dpy, dc.gc, GCForeground, &gcv);
 624	x = (dc.font.ascent + dc.font.descent + 2) / 4;
 625	r.x = dc.x + 1;
 626	r.y = dc.y + 1;
 627	if(filled) {
 628		r.width = r.height = x + 1;
 629		XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
 630	}
 631	else if(empty) {
 632		r.width = r.height = x;
 633		XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
 634	}
 635}
 636
 637void
 638drawtext(Monitor *m, const char *text, unsigned long col[ColLast], Bool invert) {
 639	int x, y, w, h;
 640	static char buf[256];
 641	unsigned int len, olen;
 642	XRectangle r = { dc.x, dc.y, dc.w, dc.h };
 643
 644	XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
 645	XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
 646	if(!text)
 647		return;
 648	w = 0;
 649	olen = len = strlen(text);
 650	if(len >= sizeof buf)
 651		len = sizeof buf - 1;
 652	memcpy(buf, text, len);
 653	buf[len] = 0;
 654	h = dc.font.ascent + dc.font.descent;
 655	y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
 656	x = dc.x + (h / 2);
 657	/* shorten text if necessary */
 658	while(len && (w = textnw(buf, len)) > dc.w - h)
 659		buf[--len] = 0;
 660	if(len < olen) {
 661		if(len > 1)
 662			buf[len - 1] = '.';
 663		if(len > 2)
 664			buf[len - 2] = '.';
 665		if(len > 3)
 666			buf[len - 3] = '.';
 667	}
 668	if(w > dc.w)
 669		return; /* too long */
 670	XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
 671	if(dc.font.set)
 672		XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
 673	else
 674		XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
 675}
 676
 677void *
 678emallocz(unsigned int size) {
 679	void *res = calloc(1, size);
 680
 681	if(!res)
 682		eprint("fatal: could not malloc() %u bytes\n", size);
 683	return res;
 684}
 685
 686void
 687enternotify(XEvent *e) {
 688	Client *c;
 689	XCrossingEvent *ev = &e->xcrossing;
 690
 691	if(ev->mode != NotifyNormal || ev->detail == NotifyInferior) {
 692		if(!isxinerama || ev->window != root)
 693			return;
 694	}
 695	if((c = getclient(ev->window)))
 696		focus(c);
 697	else {
 698		selmonitor = monitorat();
 699		fprintf(stderr, "updating selmonitor %d\n", selmonitor);
 700		focus(NULL);
 701	}
 702}
 703
 704void
 705eprint(const char *errstr, ...) {
 706	va_list ap;
 707
 708	va_start(ap, errstr);
 709	vfprintf(stderr, errstr, ap);
 710	va_end(ap);
 711	exit(EXIT_FAILURE);
 712}
 713
 714void
 715expose(XEvent *e) {
 716	XExposeEvent *ev = &e->xexpose;
 717
 718	if(ev->count == 0) {
 719		if(ev->window == monitors[selmonitor].barwin)
 720			drawbar();
 721	}
 722}
 723
 724void
 725floating(Monitor *m) { /* default floating layout */
 726	Client *c;
 727
 728	domwfact = dozoom = False;
 729	for(c = clients; c; c = c->next)
 730		if(isvisible(c, m->id))
 731			resize(c, c->x, c->y, c->w, c->h, True);
 732}
 733
 734void
 735focus(Client *c) {
 736	Monitor *m;
 737
 738	if(c)
 739		selmonitor = c->monitor;
 740	m = &monitors[selmonitor];
 741	if(!c || (c && !isvisible(c, selmonitor)))
 742		for(c = stack; c && !isvisible(c, c->monitor); c = c->snext);
 743	if(sel && sel != c) {
 744		grabbuttons(sel, False);
 745		XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
 746	}
 747	if(c) {
 748		detachstack(c);
 749		attachstack(c);
 750		grabbuttons(c, True);
 751	}
 752	sel = c;
 753	drawbar();
 754	if(c) {
 755		XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
 756		XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 757		selmonitor = c->monitor;
 758	}
 759	else {
 760		XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 761		drawbar();
 762	}
 763}
 764
 765void
 766focusin(XEvent *e) { /* there are some broken focus acquiring clients */
 767	XFocusChangeEvent *ev = &e->xfocus;
 768
 769	if(sel && ev->window != sel->win)
 770		XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
 771}
 772
 773void
 774focusnext(const char *arg) {
 775	Client *c;
 776
 777	if(!sel)
 778		return;
 779	for(c = sel->next; c && !isvisible(c, selmonitor); c = c->next);
 780	if(!c)
 781		for(c = clients; c && !isvisible(c, selmonitor); c = c->next);
 782	if(c) {
 783		focus(c);
 784		restack();
 785	}
 786}
 787
 788void
 789focusprev(const char *arg) {
 790	Client *c;
 791
 792	if(!sel)
 793		return;
 794	for(c = sel->prev; c && !isvisible(c, selmonitor); c = c->prev);
 795	if(!c) {
 796		for(c = clients; c && c->next; c = c->next);
 797		for(; c && !isvisible(c, selmonitor); c = c->prev);
 798	}
 799	if(c) {
 800		focus(c);
 801		restack();
 802	}
 803}
 804
 805Client *
 806getclient(Window w) {
 807	Client *c;
 808
 809	for(c = clients; c && c->win != w; c = c->next);
 810	return c;
 811}
 812
 813unsigned long
 814getcolor(const char *colstr) {
 815	Colormap cmap = DefaultColormap(dpy, screen);
 816	XColor color;
 817
 818	if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
 819		eprint("error, cannot allocate color '%s'\n", colstr);
 820	return color.pixel;
 821}
 822
 823long
 824getstate(Window w) {
 825	int format, status;
 826	long result = -1;
 827	unsigned char *p = NULL;
 828	unsigned long n, extra;
 829	Atom real;
 830
 831	status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
 832			&real, &format, &n, &extra, (unsigned char **)&p);
 833	if(status != Success)
 834		return -1;
 835	if(n != 0)
 836		result = *p;
 837	XFree(p);
 838	return result;
 839}
 840
 841Bool
 842gettextprop(Window w, Atom atom, char *text, unsigned int size) {
 843	char **list = NULL;
 844	int n;
 845	XTextProperty name;
 846
 847	if(!text || size == 0)
 848		return False;
 849	text[0] = '\0';
 850	XGetTextProperty(dpy, w, &name, atom);
 851	if(!name.nitems)
 852		return False;
 853	if(name.encoding == XA_STRING)
 854		strncpy(text, (char *)name.value, size - 1);
 855	else {
 856		if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 857		&& n > 0 && *list) {
 858			strncpy(text, *list, size - 1);
 859			XFreeStringList(list);
 860		}
 861	}
 862	text[size - 1] = '\0';
 863	XFree(name.value);
 864	return True;
 865}
 866
 867void
 868grabbuttons(Client *c, Bool focused) {
 869	XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 870
 871	if(focused) {
 872		XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
 873				GrabModeAsync, GrabModeSync, None, None);
 874		XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
 875				GrabModeAsync, GrabModeSync, None, None);
 876		XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
 877				GrabModeAsync, GrabModeSync, None, None);
 878		XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
 879				GrabModeAsync, GrabModeSync, None, None);
 880
 881		XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
 882				GrabModeAsync, GrabModeSync, None, None);
 883		XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
 884				GrabModeAsync, GrabModeSync, None, None);
 885		XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
 886				GrabModeAsync, GrabModeSync, None, None);
 887		XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
 888				GrabModeAsync, GrabModeSync, None, None);
 889
 890		XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
 891				GrabModeAsync, GrabModeSync, None, None);
 892		XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
 893				GrabModeAsync, GrabModeSync, None, None);
 894		XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
 895				GrabModeAsync, GrabModeSync, None, None);
 896		XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
 897				GrabModeAsync, GrabModeSync, None, None);
 898	}
 899	else
 900		XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
 901				GrabModeAsync, GrabModeSync, None, None);
 902}
 903
 904void
 905grabkeys(void)  {
 906	unsigned int i, j;
 907	KeyCode code;
 908	XModifierKeymap *modmap;
 909
 910	/* init modifier map */
 911	modmap = XGetModifierMapping(dpy);
 912	for(i = 0; i < 8; i++)
 913		for(j = 0; j < modmap->max_keypermod; j++) {
 914			if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
 915				numlockmask = (1 << i);
 916		}
 917	XFreeModifiermap(modmap);
 918
 919	XUngrabKey(dpy, AnyKey, AnyModifier, root);
 920	for(i = 0; i < LENGTH(keys); i++) {
 921		code = XKeysymToKeycode(dpy, keys[i].keysym);
 922		XGrabKey(dpy, code, keys[i].mod, root, True,
 923				GrabModeAsync, GrabModeAsync);
 924		XGrabKey(dpy, code, keys[i].mod | LockMask, root, True,
 925				GrabModeAsync, GrabModeAsync);
 926		XGrabKey(dpy, code, keys[i].mod | numlockmask, root, True,
 927				GrabModeAsync, GrabModeAsync);
 928		XGrabKey(dpy, code, keys[i].mod | numlockmask | LockMask, root, True,
 929				GrabModeAsync, GrabModeAsync);
 930	}
 931}
 932
 933unsigned int
 934idxoftag(const char *tag) {
 935	unsigned int i;
 936
 937	for(i = 0; (i < LENGTH(tags)) && (tags[i] != tag); i++);
 938	return (i < LENGTH(tags)) ? i : 0;
 939}
 940
 941void
 942initfont(const char *fontstr) {
 943	char *def, **missing;
 944	int i, n;
 945
 946	missing = NULL;
 947	if(dc.font.set)
 948		XFreeFontSet(dpy, dc.font.set);
 949	dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
 950	if(missing) {
 951		while(n--)
 952			fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
 953		XFreeStringList(missing);
 954	}
 955	if(dc.font.set) {
 956		XFontSetExtents *font_extents;
 957		XFontStruct **xfonts;
 958		char **font_names;
 959		dc.font.ascent = dc.font.descent = 0;
 960		font_extents = XExtentsOfFontSet(dc.font.set);
 961		n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
 962		for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
 963			if(dc.font.ascent < (*xfonts)->ascent)
 964				dc.font.ascent = (*xfonts)->ascent;
 965			if(dc.font.descent < (*xfonts)->descent)
 966				dc.font.descent = (*xfonts)->descent;
 967			xfonts++;
 968		}
 969	}
 970	else {
 971		if(dc.font.xfont)
 972			XFreeFont(dpy, dc.font.xfont);
 973		dc.font.xfont = NULL;
 974		if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
 975		&& !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
 976			eprint("error, cannot load font: '%s'\n", fontstr);
 977		dc.font.ascent = dc.font.xfont->ascent;
 978		dc.font.descent = dc.font.xfont->descent;
 979	}
 980	dc.font.height = dc.font.ascent + dc.font.descent;
 981}
 982
 983Bool
 984isoccupied(unsigned int monitor, unsigned int t) {
 985	Client *c;
 986
 987	for(c = clients; c; c = c->next)
 988		if(c->tags[t] && c->monitor == monitor)
 989			return True;
 990	return False;
 991}
 992
 993Bool
 994isprotodel(Client *c) {
 995	int i, n;
 996	Atom *protocols;
 997	Bool ret = False;
 998
 999	if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1000		for(i = 0; !ret && i < n; i++)
1001			if(protocols[i] == wmatom[WMDelete])
1002				ret = True;
1003		XFree(protocols);
1004	}
1005	return ret;
1006}
1007
1008Bool
1009isurgent(unsigned int monitor, unsigned int t) {
1010	Client *c;
1011
1012	for(c = clients; c; c = c->next)
1013		if(c->monitor == monitor && c->isurgent && c->tags[t])
1014			return True;
1015	return False;
1016}
1017
1018Bool
1019isvisible(Client *c, int monitor) {
1020	unsigned int i;
1021
1022	if(c->monitor != monitor)
1023		return False;
1024	for(i = 0; i < LENGTH(tags); i++)
1025		if(c->tags[i] && monitors[c->monitor].seltags[i])
1026			return True;
1027	return False;
1028}
1029
1030void
1031keypress(XEvent *e) {
1032	unsigned int i;
1033	KeySym keysym;
1034	XKeyEvent *ev;
1035
1036	ev = &e->xkey;
1037	keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1038	for(i = 0; i < LENGTH(keys); i++)
1039		if(keysym == keys[i].keysym
1040		&& CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
1041		{
1042			if(keys[i].func)
1043				keys[i].func(keys[i].arg);
1044		}
1045}
1046
1047void
1048killclient(const char *arg) {
1049	XEvent ev;
1050
1051	if(!sel)
1052		return;
1053	if(isprotodel(sel)) {
1054		ev.type = ClientMessage;
1055		ev.xclient.window = sel->win;
1056		ev.xclient.message_type = wmatom[WMProtocols];
1057		ev.xclient.format = 32;
1058		ev.xclient.data.l[0] = wmatom[WMDelete];
1059		ev.xclient.data.l[1] = CurrentTime;
1060		XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
1061	}
1062	else
1063		XKillClient(dpy, sel->win);
1064}
1065
1066void
1067manage(Window w, XWindowAttributes *wa) {
1068	Client *c, *t = NULL;
1069	Monitor *m;
1070	Status rettrans;
1071	Window trans;
1072	XWindowChanges wc;
1073
1074	c = emallocz(sizeof(Client));
1075	c->tags = emallocz(sizeof initags);
1076	c->win = w;
1077
1078	applyrules(c);
1079
1080	m = &monitors[c->monitor];
1081
1082	c->x = wa->x + m->sx;
1083	c->y = wa->y + m->sy;
1084	c->w = wa->width;
1085	c->h = wa->height;
1086	c->oldborder = wa->border_width;
1087
1088	if(c->w == m->sw && c->h == m->sh) {
1089		c->x = m->sx;
1090		c->y = m->sy;
1091		c->border = wa->border_width;
1092	}
1093	else {
1094		if(c->x + c->w + 2 * c->border > m->wax + m->waw)
1095			c->x = m->wax + m->waw - c->w - 2 * c->border;
1096		if(c->y + c->h + 2 * c->border > m->way + m->wah)
1097			c->y = m->way + m->wah - c->h - 2 * c->border;
1098		if(c->x < m->wax)
1099			c->x = m->wax;
1100		if(c->y < m->way)
1101			c->y = m->way;
1102		c->border = BORDERPX;
1103	}
1104	wc.border_width = c->border;
1105	XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1106	XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1107	configure(c); /* propagates border_width, if size doesn't change */
1108	updatesizehints(c);
1109	XSelectInput(dpy, w, EnterWindowMask | FocusChangeMask | PropertyChangeMask | StructureNotifyMask);
1110	grabbuttons(c, False);
1111	updatetitle(c);
1112	if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1113		for(t = clients; t && t->win != trans; t = t->next);
1114	if(t)
1115		memcpy(c->tags, t->tags, sizeof initags);
1116	if(!c->isfloating)
1117		c->isfloating = (rettrans == Success) || c->isfixed;
1118	attach(c);
1119	attachstack(c);
1120	XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1121	ban(c);
1122	XMapWindow(dpy, c->win);
1123	setclientstate(c, NormalState);
1124	arrange();
1125}
1126
1127void
1128mappingnotify(XEvent *e) {
1129	XMappingEvent *ev = &e->xmapping;
1130
1131	XRefreshKeyboardMapping(ev);
1132	if(ev->request == MappingKeyboard)
1133		grabkeys();
1134}
1135
1136void
1137maprequest(XEvent *e) {
1138	static XWindowAttributes wa;
1139	XMapRequestEvent *ev = &e->xmaprequest;
1140
1141	if(!XGetWindowAttributes(dpy, ev->window, &wa))
1142		return;
1143	if(wa.override_redirect)
1144		return;
1145	if(!getclient(ev->window))
1146		manage(ev->window, &wa);
1147}
1148
1149int
1150monitorat() {
1151	int i, x, y;
1152	Window win;
1153	unsigned int mask;
1154
1155	XQueryPointer(dpy, root, &win, &win, &x, &y, &i, &i, &mask);
1156	for(i = 0; i < mcount; i++) {
1157		if((x >= monitors[i].sx && x < monitors[i].sx + monitors[i].sw)
1158		&& (y >= monitors[i].sy && y < monitors[i].sy + monitors[i].sh)) {
1159			return i;
1160		}
1161	}
1162	return 0;
1163}
1164
1165void
1166movemouse(Client *c) {
1167	int x1, y1, ocx, ocy, di, nx, ny;
1168	unsigned int dui;
1169	Monitor *m;
1170	Window dummy;
1171	XEvent ev;
1172
1173	ocx = nx = c->x;
1174	ocy = ny = c->y;
1175	m = &monitors[c->monitor];
1176	if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1177			None, cursor[CurMove], CurrentTime) != GrabSuccess)
1178		return;
1179	XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1180	for(;;) {
1181		XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
1182		switch (ev.type) {
1183		case ButtonRelease:
1184			XUngrabPointer(dpy, CurrentTime);
1185			return;
1186		case ConfigureRequest:
1187		case Expose:
1188		case MapRequest:
1189			handler[ev.type](&ev);
1190			break;
1191		case MotionNotify:
1192			XSync(dpy, False);
1193			nx = ocx + (ev.xmotion.x - x1);
1194			ny = ocy + (ev.xmotion.y - y1);
1195			if(abs(m->wax - nx) < SNAP)
1196				nx = m->wax;
1197			else if(abs((m->wax + m->waw) - (nx + c->w + 2 * c->border)) < SNAP)
1198				nx = m->wax + m->waw - c->w - 2 * c->border;
1199			if(abs(m->way - ny) < SNAP)
1200				ny = m->way;
1201			else if(abs((m->way + m->wah) - (ny + c->h + 2 * c->border)) < SNAP)
1202				ny = m->way + m->wah - c->h - 2 * c->border;
1203			if((m->layout->arrange != floating) && (abs(nx - c->x) > SNAP || abs(ny - c->y) > SNAP))
1204				togglefloating(NULL);
1205			if((m->layout->arrange == floating) || c->isfloating)
1206				resize(c, nx, ny, c->w, c->h, False);
1207			break;
1208		}
1209	}
1210}
1211
1212Client *
1213nexttiled(Client *c, int monitor) {
1214	for(; c && (c->isfloating || !isvisible(c, monitor)); c = c->next);
1215	return c;
1216}
1217
1218void
1219propertynotify(XEvent *e) {
1220	Client *c;
1221	Window trans;
1222	XPropertyEvent *ev = &e->xproperty;
1223
1224	if(ev->state == PropertyDelete)
1225		return; /* ignore */
1226	if((c = getclient(ev->window))) {
1227		switch (ev->atom) {
1228			default: break;
1229			case XA_WM_TRANSIENT_FOR:
1230				XGetTransientForHint(dpy, c->win, &trans);
1231				if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1232					arrange();
1233				break;
1234			case XA_WM_NORMAL_HINTS:
1235				updatesizehints(c);
1236				break;
1237			case XA_WM_HINTS:
1238				updatewmhints(c);
1239				drawbar();
1240				break;
1241		}
1242		if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1243			updatetitle(c);
1244			if(c == sel)
1245				drawbar();
1246		}
1247	}
1248}
1249
1250void
1251quit(const char *arg) {
1252	readin = running = False;
1253}
1254
1255void
1256reapply(const char *arg) {
1257	static Bool zerotags[LENGTH(tags)] = { 0 };
1258	Client *c;
1259
1260	for(c = clients; c; c = c->next) {
1261		memcpy(c->tags, zerotags, sizeof zerotags);
1262		applyrules(c);
1263	}
1264	arrange();
1265}
1266
1267void
1268resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1269	Monitor *m;
1270	XWindowChanges wc;
1271
1272	m = &monitors[c->monitor];
1273
1274	if(sizehints) {
1275		/* set minimum possible */
1276		if (w < 1)
1277			w = 1;
1278		if (h < 1)
1279			h = 1;
1280
1281		/* temporarily remove base dimensions */
1282		w -= c->basew;
1283		h -= c->baseh;
1284
1285		/* adjust for aspect limits */
1286		if (c->minay > 0 && c->maxay > 0 && c->minax > 0 && c->maxax > 0) {
1287			if (w * c->maxay > h * c->maxax)
1288				w = h * c->maxax / c->maxay;
1289			else if (w * c->minay < h * c->minax)
1290				h = w * c->minay / c->minax;
1291		}
1292
1293		/* adjust for increment value */
1294		if(c->incw)
1295			w -= w % c->incw;
1296		if(c->inch)
1297			h -= h % c->inch;
1298
1299		/* restore base dimensions */
1300		w += c->basew;
1301		h += c->baseh;
1302
1303		if(c->minw > 0 && w < c->minw)
1304			w = c->minw;
1305		if(c->minh > 0 && h < c->minh)
1306			h = c->minh;
1307		if(c->maxw > 0 && w > c->maxw)
1308			w = c->maxw;
1309		if(c->maxh > 0 && h > c->maxh)
1310			h = c->maxh;
1311	}
1312	if(w <= 0 || h <= 0)
1313		return;
1314	if(x > m->sw)
1315		x = m->sw - w - 2 * c->border;
1316	if(y > m->sh)
1317		y = m->sh - h - 2 * c->border;
1318	if(x + w + 2 * c->border < m->sx)
1319		x = m->sx;
1320	if(y + h + 2 * c->border < m->sy)
1321		y = m->sy;
1322	if(c->x != x || c->y != y || c->w != w || c->h != h) {
1323		c->x = wc.x = x;
1324		c->y = wc.y = y;
1325		c->w = wc.width = w;
1326		c->h = wc.height = h;
1327		wc.border_width = c->border;
1328		XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
1329		configure(c);
1330		XSync(dpy, False);
1331	}
1332}
1333
1334void
1335resizemouse(Client *c) {
1336	int ocx, ocy;
1337	int nw, nh;
1338	Monitor *m;
1339	XEvent ev;
1340
1341	ocx = c->x;
1342	ocy = c->y;
1343	m = &monitors[c->monitor];
1344	if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1345			None, cursor[CurResize], CurrentTime) != GrabSuccess)
1346		return;
1347	XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1348	for(;;) {
1349		XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
1350		switch(ev.type) {
1351		case ButtonRelease:
1352			XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1353					c->w + c->border - 1, c->h + c->border - 1);
1354			XUngrabPointer(dpy, CurrentTime);
1355			while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1356			return;
1357		case ConfigureRequest:
1358		case Expose:
1359		case MapRequest:
1360			handler[ev.type](&ev);
1361			break;
1362		case MotionNotify:
1363			XSync(dpy, False);
1364			if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1365				nw = 1;
1366			if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1367				nh = 1;
1368			if((m->layout->arrange != floating) && (abs(nw - c->w) > SNAP || abs(nh - c->h) > SNAP))
1369				togglefloating(NULL);
1370			if((m->layout->arrange == floating) || c->isfloating)
1371				resize(c, c->x, c->y, nw, nh, True);
1372			break;
1373		}
1374	}
1375}
1376
1377void
1378restack(void) {
1379	unsigned int i;
1380	Client *c;
1381	XEvent ev;
1382	XWindowChanges wc;
1383
1384	drawbar();
1385	if(!sel)
1386		return;
1387	if(sel->isfloating || (monitors[selmonitor].layout->arrange == floating))
1388		XRaiseWindow(dpy, sel->win);
1389	if(monitors[selmonitor].layout->arrange != floating) {
1390		wc.stack_mode = Below;
1391		wc.sibling = monitors[selmonitor].barwin;
1392		if(!sel->isfloating) {
1393			XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
1394			wc.sibling = sel->win;
1395		}
1396		for(i = 0; i < mcount; i++) {
1397			for(c = nexttiled(clients, i); c; c = nexttiled(c->next, i)) {
1398				if(c == sel)
1399					continue;
1400				XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
1401				wc.sibling = c->win;
1402			}
1403		}
1404	}
1405	XSync(dpy, False);
1406	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1407}
1408
1409void
1410run(void) {
1411	char *p;
1412	char buf[sizeof stext];
1413	fd_set rd;
1414	int r, xfd;
1415	unsigned int len, offset;
1416	XEvent ev;
1417
1418	/* main event loop, also reads status text from stdin */
1419	XSync(dpy, False);
1420	xfd = ConnectionNumber(dpy);
1421	readin = True;
1422	offset = 0;
1423	len = sizeof stext - 1;
1424	buf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1425	while(running) {
1426		FD_ZERO(&rd);
1427		if(readin)
1428			FD_SET(STDIN_FILENO, &rd);
1429		FD_SET(xfd, &rd);
1430		if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1431			if(errno == EINTR)
1432				continue;
1433			eprint("select failed\n");
1434		}
1435		if(FD_ISSET(STDIN_FILENO, &rd)) {
1436			switch((r = read(STDIN_FILENO, buf + offset, len - offset))) {
1437			case -1:
1438				strncpy(stext, strerror(errno), len);
1439				readin = False;
1440				break;
1441			case 0:
1442				strncpy(stext, "EOF", 4);
1443				readin = False;
1444				break;
1445			default:
1446				for(p = buf + offset; r > 0; p++, r--, offset++)
1447					if(*p == '\n' || *p == '\0') {
1448						*p = '\0';
1449						strncpy(stext, buf, len);
1450						p += r - 1; /* p is buf + offset + r - 1 */
1451						for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1452						offset = r;
1453						if(r)
1454							memmove(buf, p - r + 1, r);
1455						break;
1456					}
1457				break;
1458			}
1459			drawbar();
1460		}
1461		while(XPending(dpy)) {
1462			XNextEvent(dpy, &ev);
1463			if(handler[ev.type])
1464				(handler[ev.type])(&ev); /* call handler */
1465		}
1466	}
1467}
1468
1469void
1470scan(void) {
1471	unsigned int i, num;
1472	Window *wins, d1, d2;
1473	XWindowAttributes wa;
1474
1475	wins = NULL;
1476	if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1477		for(i = 0; i < num; i++) {
1478			if(!XGetWindowAttributes(dpy, wins[i], &wa)
1479					|| wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1480				continue;
1481			if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1482				manage(wins[i], &wa);
1483		}
1484		for(i = 0; i < num; i++) { /* now the transients */
1485			if(!XGetWindowAttributes(dpy, wins[i], &wa))
1486				continue;
1487			if(XGetTransientForHint(dpy, wins[i], &d1)
1488					&& (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1489				manage(wins[i], &wa);
1490		}
1491	}
1492	if(wins)
1493		XFree(wins);
1494}
1495
1496void
1497setclientstate(Client *c, long state) {
1498	long data[] = {state, None};
1499
1500	XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1501			PropModeReplace, (unsigned char *)data, 2);
1502}
1503
1504void
1505setlayout(const char *arg) {
1506	unsigned int i;
1507	Monitor *m = &monitors[monitorat()];
1508
1509	if(!arg) {
1510		m->layout++;
1511		if(m->layout == &layouts[LENGTH(layouts)])
1512			m->layout = &layouts[0];
1513	}
1514	else {
1515		for(i = 0; i < LENGTH(layouts); i++)
1516			if(!strcmp(arg, layouts[i].symbol))
1517				break;
1518		if(i == LENGTH(layouts))
1519			return;
1520		m->layout = &layouts[i];
1521	}
1522	if(sel)
1523		arrange();
1524	else
1525		drawbar();
1526}
1527
1528void
1529setmwfact(const char *arg) {
1530	double delta;
1531
1532	Monitor *m = &monitors[monitorat()];
1533
1534	if(!domwfact)
1535		return;
1536	/* arg handling, manipulate mwfact */
1537	if(arg == NULL)
1538		m->mwfact = MWFACT;
1539	else if(sscanf(arg, "%lf", &delta) == 1) {
1540		if(arg[0] == '+' || arg[0] == '-')
1541			m->mwfact += delta;
1542		else
1543			m->mwfact = delta;
1544		if(m->mwfact < 0.1)
1545			m->mwfact = 0.1;
1546		else if(m->mwfact > 0.9)
1547			m->mwfact = 0.9;
1548	}
1549	arrange();
1550}
1551
1552void
1553setup(void) {
1554	unsigned int i;
1555	Monitor *m;
1556	XSetWindowAttributes wa;
1557	XineramaScreenInfo *info = NULL;
1558
1559	/* init atoms */
1560	wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1561	wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1562	wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1563	wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1564	netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1565	netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1566
1567	/* init cursors */
1568	wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1569	cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1570	cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1571
1572	// init screens/monitors first
1573	mcount = 1;
1574	if((isxinerama = XineramaIsActive(dpy)))
1575		info = XineramaQueryScreens(dpy, &mcount);
1576	monitors = emallocz(mcount * sizeof(Monitor));
1577
1578	screen = DefaultScreen(dpy);
1579	root = RootWindow(dpy, screen);
1580
1581	/* init appearance */
1582	dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1583	dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1584	dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1585	dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1586	dc.sel[ColBG] = getcolor(SELBGCOLOR);
1587	dc.sel[ColFG] = getcolor(SELFGCOLOR);
1588	initfont(FONT);
1589	dc.h = bh = dc.font.height + 2;
1590	dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1591	dc.gc = XCreateGC(dpy, root, 0, 0);
1592	XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1593	if(!dc.font.set)
1594		XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1595
1596	for(blw = i = 0; i < LENGTH(layouts); i++) {
1597		i = textw(layouts[i].symbol);
1598		if(i > blw)
1599			blw = i;
1600	}
1601	for(i = 0; i < mcount; i++) {
1602		/* init geometry */
1603		m = &monitors[i];
1604		m->id = i;
1605
1606		if (mcount != 1 && isxinerama) {
1607			m->sx = info[i].x_org;
1608			m->sy = info[i].y_org;
1609			m->sw = info[i].width;
1610			m->sh = info[i].height;
1611			fprintf(stderr, "monitor[%d]: %d,%d,%d,%d\n", i, m->sx, m->sy, m->sw, m->sh);
1612		}
1613		else {
1614			m->sx = 0;
1615			m->sy = 0;
1616			m->sw = DisplayWidth(dpy, screen);
1617			m->sh = DisplayHeight(dpy, screen);
1618		}
1619
1620		m->seltags = emallocz(sizeof initags);
1621		m->prevtags = emallocz(sizeof initags);
1622
1623		memcpy(m->seltags, initags, sizeof initags);
1624		memcpy(m->prevtags, initags, sizeof initags);
1625
1626		/* init layouts */
1627		m->mwfact = MWFACT;
1628		m->layout = &layouts[0];
1629
1630		// TODO: bpos per screen?
1631		bpos = BARPOS;
1632		wa.override_redirect = 1;
1633		wa.background_pixmap = ParentRelative;
1634		wa.event_mask = ButtonPressMask | ExposureMask;
1635
1636		/* init bars */
1637		m->barwin = XCreateWindow(dpy, root, m->sx, m->sy, m->sw, bh, 0,
1638				DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
1639				CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
1640		XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1641		updatebarpos(m);
1642		XMapRaised(dpy, m->barwin);
1643		strcpy(stext, "dwm-"VERSION);
1644
1645		/* EWMH support per monitor */
1646		XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1647				PropModeReplace, (unsigned char *) netatom, NetLast);
1648
1649		/* select for events */
1650		wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
1651				| EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
1652		XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
1653		XSelectInput(dpy, root, wa.event_mask);
1654	}
1655	if(info)
1656		XFree(info);
1657
1658	/* grab keys */
1659	grabkeys();
1660
1661	/* init tags */
1662	compileregs();
1663
1664	selmonitor = monitorat();
1665	fprintf(stderr, "selmonitor == %d\n", selmonitor);
1666}
1667
1668void
1669spawn(const char *arg) {
1670	static char *shell = NULL;
1671
1672	if(!shell && !(shell = getenv("SHELL")))
1673		shell = "/bin/sh";
1674	if(!arg)
1675		return;
1676	/* The double-fork construct avoids zombie processes and keeps the code
1677	 * clean from stupid signal handlers. */
1678	if(fork() == 0) {
1679		if(fork() == 0) {
1680			if(dpy)
1681				close(ConnectionNumber(dpy));
1682			setsid();
1683			execl(shell, shell, "-c", arg, (char *)NULL);
1684			fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1685			perror(" failed");
1686		}
1687		exit(0);
1688	}
1689	wait(0);
1690}
1691
1692void
1693tag(const char *arg) {
1694	unsigned int i;
1695
1696	if(!sel)
1697		return;
1698	for(i = 0; i < LENGTH(tags); i++)
1699		sel->tags[i] = (NULL == arg);
1700	sel->tags[idxoftag(arg)] = True;
1701	arrange();
1702}
1703
1704unsigned int
1705textnw(const char *text, unsigned int len) {
1706	XRectangle r;
1707
1708	if(dc.font.set) {
1709		XmbTextExtents(dc.font.set, text, len, NULL, &r);
1710		return r.width;
1711	}
1712	return XTextWidth(dc.font.xfont, text, len);
1713}
1714
1715unsigned int
1716textw(const char *text) {
1717	return textnw(text, strlen(text)) + dc.font.height;
1718}
1719
1720void
1721tile(Monitor *m) {
1722	unsigned int i, n, nx, ny, nw, nh, mw, th;
1723	Client *c, *mc;
1724
1725	domwfact = dozoom = True;
1726
1727	nx = ny = nw = 0; /* gcc stupidity requires this */
1728
1729	for(n = 0, c = nexttiled(clients, m->id); c; c = nexttiled(c->next, m->id))
1730		n++;
1731
1732	/* window geoms */
1733	mw = (n == 1) ? m->waw : m->mwfact * m->waw;
1734	th = (n > 1) ? m->wah / (n - 1) : 0;
1735	if(n > 1 && th < bh)
1736		th = m->wah;
1737
1738	for(i = 0, c = mc = nexttiled(clients, m->id); c; c = nexttiled(c->next, m->id)) {
1739		if(i == 0) { /* master */
1740			nx = m->wax;
1741			ny = m->way;
1742			nw = mw - 2 * c->border;
1743			nh = m->wah - 2 * c->border;
1744		}
1745		else {  /* tile window */
1746			if(i == 1) {
1747				ny = m->way;
1748				nx += mc->w + 2 * mc->border;
1749				nw = m->waw - mw - 2 * c->border;
1750			}
1751			if(i + 1 == n) /* remainder */
1752				nh = (m->way + m->wah) - ny - 2 * c->border;
1753			else
1754				nh = th - 2 * c->border;
1755		}
1756		resize(c, nx, ny, nw, nh, RESIZEHINTS);
1757		if((RESIZEHINTS) && ((c->h < bh) || (c->h > nh) || (c->w < bh) || (c->w > nw)))
1758			/* client doesn't accept size constraints */
1759			resize(c, nx, ny, nw, nh, False);
1760		if(n > 1 && th != m->wah)
1761			ny = c->y + c->h + 2 * c->border;
1762
1763		i++;
1764	}
1765}
1766void
1767togglebar(const char *arg) {
1768	if(bpos == BarOff)
1769		bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
1770	else
1771		bpos = BarOff;
1772	updatebarpos(&monitors[monitorat()]);
1773	arrange();
1774}
1775
1776void
1777togglefloating(const char *arg) {
1778	if(!sel)
1779		return;
1780	sel->isfloating = !sel->isfloating;
1781	if(sel->isfloating)
1782		resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1783	arrange();
1784}
1785
1786void
1787toggletag(const char *arg) {
1788	unsigned int i, j;
1789
1790	if(!sel)
1791		return;
1792	i = idxoftag(arg);
1793	sel->tags[i] = !sel->tags[i];
1794	for(j = 0; j < LENGTH(tags) && !sel->tags[j]; j++);
1795	if(j == LENGTH(tags))
1796		sel->tags[i] = True; /* at least one tag must be enabled */
1797	arrange();
1798}
1799
1800void
1801toggleview(const char *arg) {
1802	unsigned int i, j;
1803
1804	Monitor *m = &monitors[monitorat()];
1805
1806	i = idxoftag(arg);
1807	m->seltags[i] = !m->seltags[i];
1808	for(j = 0; j < LENGTH(tags) && !m->seltags[j]; j++);
1809	if(j == LENGTH(tags))
1810		m->seltags[i] = True; /* at least one tag must be viewed */
1811	arrange();
1812}
1813
1814void
1815unban(Client *c) {
1816	if(!c->isbanned)
1817		return;
1818	XMoveWindow(dpy, c->win, c->x, c->y);
1819	c->isbanned = False;
1820}
1821
1822void
1823unmanage(Client *c) {
1824	XWindowChanges wc;
1825
1826	wc.border_width = c->oldborder;
1827	/* The server grab construct avoids race conditions. */
1828	XGrabServer(dpy);
1829	XSetErrorHandler(xerrordummy);
1830	XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1831	detach(c);
1832	detachstack(c);
1833	if(sel == c)
1834		focus(NULL);
1835	XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1836	setclientstate(c, WithdrawnState);
1837	free(c->tags);
1838	free(c);
1839	XSync(dpy, False);
1840	XSetErrorHandler(xerror);
1841	XUngrabServer(dpy);
1842	arrange();
1843}
1844
1845void
1846unmapnotify(XEvent *e) {
1847	Client *c;
1848	XUnmapEvent *ev = &e->xunmap;
1849
1850	if((c = getclient(ev->window)))
1851		unmanage(c);
1852}
1853
1854void
1855updatebarpos(Monitor *m) {
1856	XEvent ev;
1857
1858	m->wax = m->sx;
1859	m->way = m->sy;
1860	m->wah = m->sh;
1861	m->waw = m->sw;
1862	switch(bpos) {
1863	default:
1864		m->wah -= bh;
1865		m->way += bh;
1866		XMoveWindow(dpy, m->barwin, m->sx, m->sy);
1867		break;
1868	case BarBot:
1869		m->wah -= bh;
1870		XMoveWindow(dpy, m->barwin, m->sx, m->sy + m->wah);
1871		break;
1872	case BarOff:
1873		XMoveWindow(dpy, m->barwin, m->sx, m->sy - bh);
1874		break;
1875	}
1876	XSync(dpy, False);
1877	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1878}
1879
1880void
1881updatesizehints(Client *c) {
1882	long msize;
1883	XSizeHints size;
1884
1885	if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1886		size.flags = PSize;
1887	c->flags = size.flags;
1888	if(c->flags & PBaseSize) {
1889		c->basew = size.base_width;
1890		c->baseh = size.base_height;
1891	}
1892	else if(c->flags & PMinSize) {
1893		c->basew = size.min_width;
1894		c->baseh = size.min_height;
1895	}
1896	else
1897		c->basew = c->baseh = 0;
1898	if(c->flags & PResizeInc) {
1899		c->incw = size.width_inc;
1900		c->inch = size.height_inc;
1901	}
1902	else
1903		c->incw = c->inch = 0;
1904	if(c->flags & PMaxSize) {
1905		c->maxw = size.max_width;
1906		c->maxh = size.max_height;
1907	}
1908	else
1909		c->maxw = c->maxh = 0;
1910	if(c->flags & PMinSize) {
1911		c->minw = size.min_width;
1912		c->minh = size.min_height;
1913	}
1914	else if(c->flags & PBaseSize) {
1915		c->minw = size.base_width;
1916		c->minh = size.base_height;
1917	}
1918	else
1919		c->minw = c->minh = 0;
1920	if(c->flags & PAspect) {
1921		c->minax = size.min_aspect.x;
1922		c->maxax = size.max_aspect.x;
1923		c->minay = size.min_aspect.y;
1924		c->maxay = size.max_aspect.y;
1925	}
1926	else
1927		c->minax = c->maxax = c->minay = c->maxay = 0;
1928	c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1929			&& c->maxw == c->minw && c->maxh == c->minh);
1930}
1931
1932void
1933updatetitle(Client *c) {
1934	if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1935		gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1936}
1937
1938void
1939updatewmhints(Client *c) {
1940	XWMHints *wmh;
1941
1942	if((wmh = XGetWMHints(dpy, c->win))) {
1943		c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1944		XFree(wmh);
1945	}
1946}
1947
1948/* There's no way to check accesses to destroyed windows, thus those cases are
1949 * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
1950 * default error handler, which may call exit.  */
1951int
1952xerror(Display *dpy, XErrorEvent *ee) {
1953	if(ee->error_code == BadWindow
1954	|| (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1955	|| (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1956	|| (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1957	|| (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1958	|| (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1959	|| (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1960	|| (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1961		return 0;
1962	fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1963		ee->request_code, ee->error_code);
1964	return xerrorxlib(dpy, ee); /* may call exit */
1965}
1966
1967int
1968xerrordummy(Display *dsply, XErrorEvent *ee) {
1969	return 0;
1970}
1971
1972/* Startup Error handler to check if another window manager
1973 * is already running. */
1974int
1975xerrorstart(Display *dsply, XErrorEvent *ee) {
1976	otherwm = True;
1977	return -1;
1978}
1979
1980void
1981view(const char *arg) {
1982	unsigned int i;
1983	Bool tmp[LENGTH(tags)];
1984	Monitor *m = &monitors[monitorat()];
1985
1986	for(i = 0; i < LENGTH(tags); i++)
1987		tmp[i] = (NULL == arg);
1988	tmp[idxoftag(arg)] = True;
1989	if(memcmp(m->seltags, tmp, sizeof initags) != 0) {
1990		memcpy(m->prevtags, m->seltags, sizeof initags);
1991		memcpy(m->seltags, tmp, sizeof initags);
1992		arrange();
1993	}
1994}
1995
1996void
1997viewprevtag(const char *arg) {
1998	static Bool tmp[LENGTH(tags)];
1999
2000	Monitor *m = &monitors[monitorat()];
2001
2002	memcpy(tmp, m->seltags, sizeof initags);
2003	memcpy(m->seltags, m->prevtags, sizeof initags);
2004	memcpy(m->prevtags, tmp, sizeof initags);
2005	arrange();
2006}
2007
2008void
2009zoom(const char *arg) {
2010	Client *c = sel;
2011
2012	if(!sel || !dozoom || sel->isfloating)
2013		return;
2014	if(c == nexttiled(clients, c->monitor))
2015		if(!(c = nexttiled(c->next, c->monitor)))
2016			return;
2017	detach(c);
2018	attach(c);
2019	focus(c);
2020	arrange();
2021}
2022
2023void
2024movetomonitor(const char *arg) {
2025	if (sel) {
2026		sel->monitor = arg ? atoi(arg) : (sel->monitor+1) % mcount;
2027
2028		memcpy(sel->tags, monitors[sel->monitor].seltags, sizeof initags);
2029		resize(sel, monitors[sel->monitor].wax, monitors[sel->monitor].way, sel->w, sel->h, True);
2030		arrange();
2031	}
2032}
2033
2034void
2035selectmonitor(const char *arg) {
2036	Monitor *m = &monitors[arg ? atoi(arg) : (monitorat()+1) % mcount];
2037
2038	XWarpPointer(dpy, None, root, 0, 0, 0, 0, m->wax+m->waw/2, m->way+m->wah/2);
2039	focus(NULL);
2040}
2041
2042
2043int
2044main(int argc, char *argv[]) {
2045	if(argc == 2 && !strcmp("-v", argv[1]))
2046		eprint("dwm-"VERSION", © 2006-2008 Anselm R. Garbe, Sander van Dijk, "
2047		       "Jukka Salmi, Premysl Hruby, Szabolcs Nagy, Christof Musik\n");
2048	else if(argc != 1)
2049		eprint("usage: dwm [-v]\n");
2050
2051	setlocale(LC_CTYPE, "");
2052	if(!(dpy = XOpenDisplay(0)))
2053		eprint("dwm: cannot open display\n");
2054
2055	checkotherwm();
2056	setup();
2057	drawbar();
2058	scan();
2059	run();
2060	cleanup();
2061
2062	XCloseDisplay(dpy);
2063	return 0;
2064}