dwm.c

   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  * The event handlers of dwm are organized in an array which is accessed
  10  * whenever a new event has been fetched. This allows event dispatching
  11  * in O(1) time.
  12  *
  13  * Each child of the root window is called a client, except windows which have
  14  * set the override_redirect flag.  Clients are organized in a global
  15  * linked client list, the focus history is remembered through a global
  16  * stack list. Each client contains a bit array to indicate the tags of a
  17  * client.
  18  *
  19  * Keys and tagging rules are organized as arrays and defined in config.h.
  20  *
  21  * To understand everything else, start reading main().
  22  */
  23 #include <errno.h>
  24 #include <locale.h>
  25 #include <stdarg.h>
  26 #include <signal.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <unistd.h>
  31 #include <sys/types.h>
  32 #include <sys/wait.h>
  33 #include <X11/cursorfont.h>
  34 #include <X11/keysym.h>
  35 #include <X11/Xatom.h>
  36 #include <X11/Xlib.h>
  37 #include <X11/Xproto.h>
  38 #include <X11/Xutil.h>
  39 #ifdef XINERAMA
  40 #include <X11/extensions/Xinerama.h>
  41 #endif /* XINERAMA */
  42
  43 /* macros */
  44 #define BUTTONMASK              (ButtonPressMask|ButtonReleaseMask)
  45 #define CLEANMASK(mask)         (mask & ~(numlockmask|LockMask))
  46 #define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
  47 #define ISVISIBLE(C)            ((C->tags & C->mon->tagset[C->mon->seltags]))
  48 #define LENGTH(X)               (sizeof X / sizeof X[0])
  49 #define MAX(A, B)               ((A) > (B) ? (A) : (B))
  50 #define MIN(A, B)               ((A) < (B) ? (A) : (B))
  51 #define MOUSEMASK               (BUTTONMASK|PointerMotionMask)
  52 #define WIDTH(X)                ((X)->w + 2 * (X)->bw)
  53 #define HEIGHT(X)               ((X)->h + 2 * (X)->bw)
  54 #define TAGMASK                 ((int)((1LL << LENGTH(tags)) - 1))
  55 #define TEXTW(X)                (textnw(X, strlen(X)) + dc.font.height)
  56
  57 /* enums */
  58 enum { CurNormal, CurResize, CurMove, CurLast };        /* cursor */
  59 enum { ColBorder, ColFG, ColBG, ColLast };              /* color */
  60 enum { NetSupported, NetWMName, NetLast };              /* EWMH atoms */
  61 enum { WMProtocols, WMDelete, WMState, WMLast };        /* default atoms */
  62 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
  63        ClkClientWin, ClkRootWin, ClkLast };             /* clicks */
  64
  65 typedef union {
  66         int i;
  67         unsigned int ui;
  68         float f;
  69         void *v;
  70 } Arg;
  71
  72 typedef struct {
  73         unsigned int click;
  74         unsigned int mask;
  75         unsigned int button;
  76         void (*func)(const Arg *arg);
  77         const Arg arg;
  78 } Button;
  79
  80 typedef struct Monitor Monitor;
  81 typedef struct Client Client;
  82 struct Client {
  83         char name[256];
  84         float mina, maxa;
  85         int x, y, w, h;
  86         int basew, baseh, incw, inch, maxw, maxh, minw, minh;
  87         int bw, oldbw;
  88         unsigned int tags;
  89         Bool isfixed, isfloating, isurgent;
  90         Client *next;
  91         Client *snext;
  92         Monitor *mon;
  93         Window win;
  94 };
  95
  96 typedef struct {
  97         int x, y, w, h;
  98         unsigned long norm[ColLast];
  99         unsigned long sel[ColLast];
 100         Drawable drawable;
 101         GC gc;
 102         struct {
 103                 int ascent;
 104                 int descent;
 105                 int height;
 106                 XFontSet set;
 107                 XFontStruct *xfont;
 108         } font;
 109 } DC; /* draw context */
 110
 111 typedef struct {
 112         unsigned int mod;
 113         KeySym keysym;
 114         void (*func)(const Arg *);
 115         const Arg arg;
 116 } Key;
 117
 118 typedef struct {
 119         const char *symbol;
 120         void (*arrange)(Monitor *);
 121 } Layout;
 122
 123 struct Monitor {
 124         int screen_number;
 125         float mfact;
 126         int by, btx;          /* bar geometry */
 127         int mx, my, mw, mh;   /* screen size */
 128         int wx, wy, ww, wh;   /* window area  */
 129         unsigned int seltags;
 130         unsigned int sellt;
 131         unsigned int tagset[2];
 132         Bool showbar;
 133         Bool topbar;
 134         Client *clients;
 135         Client *sel;
 136         Client *stack;
 137         Monitor *next;
 138         Window barwin;
 139 };
 140
 141 typedef struct {
 142         const char *class;
 143         const char *instance;
 144         const char *title;
 145         unsigned int tags;
 146         Bool isfloating;
 147 } Rule;
 148
 149 /* function declarations */
 150 static void applyrules(Client *c);
 151 static Bool applysizehints(Client *c, int *x, int *y, int *w, int *h);
 152 static void arrange(void);
 153 static void attach(Client *c);
 154 static void attachstack(Client *c);
 155 static void buttonpress(XEvent *e);
 156 static void checkotherwm(void);
 157 static void cleanup(void);
 158 static void cleanupmons(void);
 159 static void clearurgent(Client *c);
 160 static void configure(Client *c);
 161 static void configurenotify(XEvent *e);
 162 static void configurerequest(XEvent *e);
 163 static void destroynotify(XEvent *e);
 164 static void detach(Client *c);
 165 static void detachstack(Client *c);
 166 static void die(const char *errstr, ...);
 167 static void drawbar(Monitor *m);
 168 static void drawbars(void);
 169 static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
 170 static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
 171 static void enternotify(XEvent *e);
 172 static void expose(XEvent *e);
 173 static void focus(Client *c);
 174 static void focusin(XEvent *e);
 175 static void focusstack(const Arg *arg);
 176 static unsigned long getcolor(const char *colstr);
 177 static Bool getrootpointer(int *x, int *y);
 178 static long getstate(Window w);
 179 static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
 180 static void grabbuttons(Client *c, Bool focused);
 181 static void grabkeys(void);
 182 static Monitor *idxtomon(unsigned int n);
 183 static void initfont(const char *fontstr);
 184 static Bool isprotodel(Client *c);
 185 static void keypress(XEvent *e);
 186 static void killclient(const Arg *arg);
 187 static void manage(Window w, XWindowAttributes *wa);
 188 static void mappingnotify(XEvent *e);
 189 static void maprequest(XEvent *e);
 190 static void monocle(Monitor *m);
 191 static void movemouse(const Arg *arg);
 192 static Client *nexttiled(Client *c);
 193 static Monitor *pointertomon(int x, int y);
 194 static void propertynotify(XEvent *e);
 195 static void quit(const Arg *arg);
 196 static void resize(Client *c, int x, int y, int w, int h);
 197 static void resizemouse(const Arg *arg);
 198 static void restack(Monitor *m);
 199 static void run(void);
 200 static void scan(void);
 201 static void sendmon(Client *c, Monitor *m);
 202 static void setclientstate(Client *c, long state);
 203 static void setlayout(const Arg *arg);
 204 static void setmfact(const Arg *arg);
 205 static void setup(void);
 206 static void showhide(Client *c);
 207 static void sigchld(int signal);
 208 static void spawn(const Arg *arg);
 209 static void tag(const Arg *arg);
 210 static int textnw(const char *text, unsigned int len);
 211 static void tile(Monitor *);
 212 static void togglebar(const Arg *arg);
 213 static void togglefloating(const Arg *arg);
 214 static void toggletag(const Arg *arg);
 215 static void toggleview(const Arg *arg);
 216 static void unfocus(Client *c);
 217 static void unmanage(Client *c);
 218 static void unmapnotify(XEvent *e);
 219 static void updategeom(void);
 220 static void updatebarpos(Monitor *m);
 221 static void updatebars(void);
 222 static void updatenumlockmask(void);
 223 static void updatesizehints(Client *c);
 224 static void updatestatus(void);
 225 static void updatetitle(Client *c);
 226 static void updatewmhints(Client *c);
 227 static void view(const Arg *arg);
 228 static Client *wintoclient(Window w);
 229 static Monitor *wintomon(Window w);
 230 static int xerror(Display *dpy, XErrorEvent *ee);
 231 static int xerrordummy(Display *dpy, XErrorEvent *ee);
 232 static int xerrorstart(Display *dpy, XErrorEvent *ee);
 233 static void zoom(const Arg *arg);
 234 #ifdef XINERAMA
 235 static void focusmon(const Arg *arg);
 236 static void tagmon(const Arg *arg);
 237 #endif /* XINERAMA */
 238
 239 /* variables */
 240 static char stext[256];
 241 static int screen;
 242 static int sw, sh;   /* X display screen geometry x, y, width, height */
 243 static int bh, blw = 0;      /* bar geometry */
 244 static int (*xerrorxlib)(Display *, XErrorEvent *);
 245 static unsigned int numlockmask = 0;
 246 static void (*handler[LASTEvent]) (XEvent *) = {
 247         [ButtonPress] = buttonpress,
 248         [ConfigureRequest] = configurerequest,
 249         [ConfigureNotify] = configurenotify,
 250         [DestroyNotify] = destroynotify,
 251         [EnterNotify] = enternotify,
 252         [Expose] = expose,
 253         [FocusIn] = focusin,
 254         [KeyPress] = keypress,
 255         [MappingNotify] = mappingnotify,
 256         [MapRequest] = maprequest,
 257         [PropertyNotify] = propertynotify,
 258         [UnmapNotify] = unmapnotify
 259 };
 260 static Atom wmatom[WMLast], netatom[NetLast];
 261 static Bool otherwm;
 262 static Bool running = True;
 263 static Cursor cursor[CurLast];
 264 static Display *dpy;
 265 static DC dc;
 266 static Layout *lt[] = { NULL, NULL };
 267 static Monitor *mons = NULL, *selmon = NULL;
 268 static Window root;
 269 /* configuration, allows nested code to access above variables */
 270 #include "config.h"
 271
 272 /* compile-time check if all tags fit into an unsigned int bit array. */
 273 struct NumTags { char limitexceeded[sizeof(unsigned int) * 8 < LENGTH(tags) ? -1 : 1]; };
 274
 275 /* function implementations */
 276 void
 277 applyrules(Client *c) {
 278         unsigned int i;
 279         Rule *r;
 280         XClassHint ch = { 0 };
 281
 282         /* rule matching */
 283         c->isfloating = c->tags = 0;
 284         if(XGetClassHint(dpy, c->win, &ch)) {
 285                 for(i = 0; i < LENGTH(rules); i++) {
 286                         r = &rules[i];
 287                         if((!r->title || strstr(c->name, r->title))
 288                         && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
 289                         && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
 290                                 c->isfloating = r->isfloating;
 291                                 c->tags |= r->tags;
 292                         }
 293                 }
 294                 if(ch.res_class)
 295                         XFree(ch.res_class);
 296                 if(ch.res_name)
 297                         XFree(ch.res_name);
 298         }
 299         c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
 300 }
 301
 302 Bool
 303 applysizehints(Client *c, int *x, int *y, int *w, int *h) {
 304         Bool baseismin;
 305         Monitor *m = c->mon;
 306
 307         /* set minimum possible */
 308         *w = MAX(1, *w);
 309         *h = MAX(1, *h);
 310
 311         if(*x > m->mx + m->mw)
 312                 *x = m->mw - WIDTH(c);
 313         if(*y > m->my + m->mh)
 314                 *y = m->mh - HEIGHT(c);
 315         if(*x + *w + 2 * c->bw < m->mx)
 316                 *x = m->mx;
 317         if(*y + *h + 2 * c->bw < m->my)
 318                 *y = m->my;
 319         if(*h < bh)
 320                 *h = bh;
 321         if(*w < bh)
 322                 *w = bh;
 323
 324         if(resizehints || c->isfloating) {
 325                 /* see last two sentences in ICCCM 4.1.2.3 */
 326                 baseismin = c->basew == c->minw && c->baseh == c->minh;
 327
 328                 if(!baseismin) { /* temporarily remove base dimensions */
 329                         *w -= c->basew;
 330                         *h -= c->baseh;
 331                 }
 332
 333                 /* adjust for aspect limits */
 334                 if(c->mina > 0 && c->maxa > 0) {
 335                         if(c->maxa < (float)*w / *h)
 336                                 *w = *h * c->maxa;
 337                         else if(c->mina < (float)*h / *w)
 338                                 *h = *w * c->mina;
 339                 }
 340
 341                 if(baseismin) { /* increment calculation requires this */
 342                         *w -= c->basew;
 343                         *h -= c->baseh;
 344                 }
 345
 346                 /* adjust for increment value */
 347                 if(c->incw)
 348                         *w -= *w % c->incw;
 349                 if(c->inch)
 350                         *h -= *h % c->inch;
 351
 352                 /* restore base dimensions */
 353                 *w += c->basew;
 354                 *h += c->baseh;
 355
 356                 *w = MAX(*w, c->minw);
 357                 *h = MAX(*h, c->minh);
 358
 359                 if(c->maxw)
 360                         *w = MIN(*w, c->maxw);
 361
 362                 if(c->maxh)
 363                         *h = MIN(*h, c->maxh);
 364         }
 365         return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
 366 }
 367
 368 void
 369 arrange(void) {
 370         Monitor *m;
 371
 372         /* optimise two loops into one, check focus(NULL) */
 373         for(m = mons; m; m = m->next)
 374                 showhide(m->stack);
 375         focus(NULL);
 376         for(m = mons; m; m = m->next) {
 377                 if(lt[m->sellt]->arrange)
 378                         lt[m->sellt]->arrange(m);
 379                 restack(m);
 380         }
 381 }
 382
 383 void
 384 attach(Client *c) {
 385         c->next = c->mon->clients;
 386         c->mon->clients = c;
 387 }
 388
 389 void
 390 attachstack(Client *c) {
 391         c->snext = c->mon->stack;
 392         c->mon->stack = c;
 393 }
 394
 395 void
 396 buttonpress(XEvent *e) {
 397         unsigned int i, x, click;
 398         Arg arg = {0};
 399         Client *c;
 400         Monitor *m;
 401         XButtonPressedEvent *ev = &e->xbutton;
 402
 403         click = ClkRootWin;
 404         /* focus monitor if necessary */
 405         if((m = wintomon(ev->window)) && m != selmon) {
 406                 unfocus(selmon->sel);
 407                 selmon = m;
 408                 focus(NULL);
 409         }
 410         if(ev->window == selmon->barwin && ev->x >= selmon->btx) {
 411                 i = 0;
 412                 x = selmon->btx;
 413                 do
 414                         x += TEXTW(tags[i]);
 415                 while(ev->x >= x && ++i < LENGTH(tags));
 416                 if(i < LENGTH(tags)) {
 417                         click = ClkTagBar;
 418                         arg.ui = 1 << i;
 419                 }
 420                 else if(ev->x < x + blw)
 421                         click = ClkLtSymbol;
 422                 else if(ev->x > selmon->wx + selmon->ww - TEXTW(stext))
 423                         click = ClkStatusText;
 424                 else
 425                         click = ClkWinTitle;
 426         }
 427         else if((c = wintoclient(ev->window))) {
 428                 focus(c);
 429                 click = ClkClientWin;
 430         }
 431
 432         for(i = 0; i < LENGTH(buttons); i++)
 433                 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
 434                    && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
 435                         buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
 436 }
 437
 438 void
 439 checkotherwm(void) {
 440         otherwm = False;
 441         xerrorxlib = XSetErrorHandler(xerrorstart);
 442
 443         /* this causes an error if some other window manager is running */
 444         XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
 445         XSync(dpy, False);
 446         if(otherwm)
 447                 die("dwm: another window manager is already running\n");
 448         XSetErrorHandler(xerror);
 449         XSync(dpy, False);
 450 }
 451
 452 void
 453 cleanup(void) {
 454         Arg a = {.ui = ~0};
 455         Layout foo = { "", NULL };
 456         Monitor *m;
 457
 458         view(&a);
 459         lt[selmon->sellt] = &foo;
 460         for(m = mons; m; m = m->next)
 461                 while(m->stack)
 462                         unmanage(m->stack);
 463         if(dc.font.set)
 464                 XFreeFontSet(dpy, dc.font.set);
 465         else
 466                 XFreeFont(dpy, dc.font.xfont);
 467         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 468         XFreePixmap(dpy, dc.drawable);
 469         XFreeGC(dpy, dc.gc);
 470         XFreeCursor(dpy, cursor[CurNormal]);
 471         XFreeCursor(dpy, cursor[CurResize]);
 472         XFreeCursor(dpy, cursor[CurMove]);
 473         cleanupmons();
 474         XSync(dpy, False);
 475         XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
 476 }
 477
 478 void
 479 cleanupmons(void) {
 480         Monitor *m;
 481
 482         while(mons) {
 483                 m = mons->next;
 484                 XUnmapWindow(dpy, mons->barwin);
 485                 XDestroyWindow(dpy, mons->barwin);
 486                 free(mons);
 487                 mons = m;
 488         }
 489 }
 490
 491 void
 492 clearurgent(Client *c) {
 493         XWMHints *wmh;
 494
 495         c->isurgent = False;
 496         if(!(wmh = XGetWMHints(dpy, c->win)))
 497                 return;
 498         wmh->flags &= ~XUrgencyHint;
 499         XSetWMHints(dpy, c->win, wmh);
 500         XFree(wmh);
 501 }
 502
 503 void
 504 configure(Client *c) {
 505         XConfigureEvent ce;
 506
 507         ce.type = ConfigureNotify;
 508         ce.display = dpy;
 509         ce.event = c->win;
 510         ce.window = c->win;
 511         ce.x = c->x;
 512         ce.y = c->y;
 513         ce.width = c->w;
 514         ce.height = c->h;
 515         ce.border_width = c->bw;
 516         ce.above = None;
 517         ce.override_redirect = False;
 518         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
 519 }
 520
 521 void
 522 configurenotify(XEvent *e) {
 523         Monitor *m;
 524         XConfigureEvent *ev = &e->xconfigure;
 525
 526         if(ev->window == root && (ev->width != sw || ev->height != sh)) {
 527                 sw = ev->width;
 528                 sh = ev->height;
 529                 updategeom();
 530                 if(dc.drawable != 0)
 531                         XFreePixmap(dpy, dc.drawable);
 532                 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
 533                 updatebars();
 534                 for(m = mons; m; m = m->next)
 535                         XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
 536                 arrange();
 537         }
 538 }
 539
 540 void
 541 configurerequest(XEvent *e) {
 542         Client *c;
 543         Monitor *m;
 544         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 545         XWindowChanges wc;
 546
 547         if((c = wintoclient(ev->window))) {
 548                 if(ev->value_mask & CWBorderWidth)
 549                         c->bw = ev->border_width;
 550                 else if(c->isfloating || !lt[selmon->sellt]->arrange) {
 551                         m = c->mon;
 552                         if(ev->value_mask & CWX)
 553                                 c->x = m->mx + ev->x;
 554                         if(ev->value_mask & CWY)
 555                                 c->y = m->my + ev->y;
 556                         if(ev->value_mask & CWWidth)
 557                                 c->w = ev->width;
 558                         if(ev->value_mask & CWHeight)
 559                                 c->h = ev->height;
 560                         if((c->x - m->mx + c->w) > m->mw && c->isfloating)
 561                                 c->x = m->mx + (m->mw / 2 - c->w / 2); /* center in x direction */
 562                         if((c->y - m->my + c->h) > m->mh && c->isfloating)
 563                                 c->y = m->my + (m->mh / 2 - c->h / 2); /* center in y direction */
 564                         if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
 565                                 configure(c);
 566                         if(ISVISIBLE(c))
 567                                 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 568                 }
 569                 else
 570                         configure(c);
 571         }
 572         else {
 573                 wc.x = ev->x;
 574                 wc.y = ev->y;
 575                 wc.width = ev->width;
 576                 wc.height = ev->height;
 577                 wc.border_width = ev->border_width;
 578                 wc.sibling = ev->above;
 579                 wc.stack_mode = ev->detail;
 580                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 581         }
 582         XSync(dpy, False);
 583 }
 584
 585 void
 586 destroynotify(XEvent *e) {
 587         Client *c;
 588         XDestroyWindowEvent *ev = &e->xdestroywindow;
 589
 590         if((c = wintoclient(ev->window)))
 591                 unmanage(c);
 592 }
 593
 594 void
 595 detach(Client *c) {
 596         Client **tc;
 597
 598         for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
 599         *tc = c->next;
 600 }
 601
 602 void
 603 detachstack(Client *c) {
 604         Client **tc, *t;
 605
 606         for(tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
 607         *tc = c->snext;
 608
 609         if(c == c->mon->sel) {
 610                 for(t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
 611                 c->mon->sel = t;
 612         }
 613 }
 614
 615 void
 616 die(const char *errstr, ...) {
 617         va_list ap;
 618
 619         va_start(ap, errstr);
 620         vfprintf(stderr, errstr, ap);
 621         va_end(ap);
 622         exit(EXIT_FAILURE);
 623 }
 624
 625 void
 626 drawbar(Monitor *m) {
 627         int x;
 628         unsigned int i, occ = 0, urg = 0;
 629         unsigned long *col;
 630         Client *c;
 631
 632         for(c = m->clients; c; c = c->next) {
 633                 occ |= c->tags;
 634                 if(c->isurgent)
 635                         urg |= c->tags;
 636         }
 637
 638         dc.x = 0;
 639 #ifdef XINERAMA
 640         if(mons->next) { /* more than a single monitor */
 641                 char buf[2];
 642                 buf[0] = m->screen_number + '0';
 643                 buf[1] = '\0';
 644                 dc.w = TEXTW(buf);
 645                 drawtext(buf, selmon == m ? dc.sel : dc.norm, True);
 646                 dc.x += dc.w;
 647         }
 648 #endif /* XINERAMA */
 649         m->btx = dc.x;
 650         for(i = 0; i < LENGTH(tags); i++) {
 651                 dc.w = TEXTW(tags[i]);
 652                 col = m->tagset[m->seltags] & 1 << i ? dc.sel : dc.norm;
 653                 drawtext(tags[i], col, urg & 1 << i);
 654                 drawsquare(m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
 655                            occ & 1 << i, urg & 1 << i, col);
 656                 dc.x += dc.w;
 657         }
 658         if(blw > 0) {
 659                 dc.w = blw;
 660                 drawtext(lt[m->sellt]->symbol, dc.norm, False);
 661                 x = dc.x + dc.w;
 662         }
 663         else
 664                 x = dc.x;
 665         if(m == selmon) { /* status is only drawn on selected monitor */
 666                 dc.w = TEXTW(stext);
 667                 dc.x = m->ww - dc.w;
 668                 if(dc.x < x) {
 669                         dc.x = x;
 670                         dc.w = m->ww - x;
 671                 }
 672                 drawtext(stext, dc.norm, False);
 673         }
 674         else {
 675                 dc.x = m->ww;
 676         }
 677         if((dc.w = dc.x - x) > bh) {
 678                 dc.x = x;
 679                 if(m->sel) {
 680                         col = m == selmon ? dc.sel : dc.norm;
 681                         drawtext(m->sel->name, col, False);
 682                         drawsquare(m->sel->isfixed, m->sel->isfloating, False, col);
 683                 }
 684                 else
 685                         drawtext(NULL, dc.norm, False);
 686         }
 687         XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->ww, bh, 0, 0);
 688         XSync(dpy, False);
 689 }
 690
 691 void
 692 drawbars(void) {
 693         Monitor *m;
 694
 695         for(m = mons; m; m = m->next)
 696                 drawbar(m);
 697 }
 698
 699 void
 700 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
 701         int x;
 702         XGCValues gcv;
 703         XRectangle r = { dc.x, dc.y, dc.w, dc.h };
 704
 705         gcv.foreground = col[invert ? ColBG : ColFG];
 706         XChangeGC(dpy, dc.gc, GCForeground, &gcv);
 707         x = (dc.font.ascent + dc.font.descent + 2) / 4;
 708         r.x = dc.x + 1;
 709         r.y = dc.y + 1;
 710         if(filled) {
 711                 r.width = r.height = x + 1;
 712                 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
 713         }
 714         else if(empty) {
 715                 r.width = r.height = x;
 716                 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
 717         }
 718 }
 719
 720 void
 721 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
 722         char buf[256];
 723         int i, x, y, h, len, olen;
 724         XRectangle r = { dc.x, dc.y, dc.w, dc.h };
 725
 726         XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
 727         XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
 728         if(!text)
 729                 return;
 730         olen = strlen(text);
 731         h = dc.font.ascent + dc.font.descent;
 732         y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
 733         x = dc.x + (h / 2);
 734         /* shorten text if necessary */
 735         for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
 736         if(!len)
 737                 return;
 738         memcpy(buf, text, len);
 739         if(len < olen)
 740                 for(i = len; i && i > len - 3; buf[--i] = '.');
 741         XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
 742         if(dc.font.set)
 743                 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
 744         else
 745                 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
 746 }
 747
 748 void
 749 enternotify(XEvent *e) {
 750         Client *c;
 751         Monitor *m;
 752         XCrossingEvent *ev = &e->xcrossing;
 753
 754         if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
 755                 return;
 756         if((m = wintomon(ev->window)) && m != selmon) {
 757                 unfocus(selmon->sel);
 758                 selmon = m;
 759         }
 760         if((c = wintoclient(ev->window)))
 761                 focus(c);
 762         else
 763                 focus(NULL);
 764 }
 765
 766 void
 767 expose(XEvent *e) {
 768         Monitor *m;
 769         XExposeEvent *ev = &e->xexpose;
 770
 771         if(ev->count == 0 && (m = wintomon(ev->window)))
 772                 drawbar(m);
 773 }
 774
 775 void
 776 focus(Client *c) {
 777         if(!c || !ISVISIBLE(c))
 778                 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
 779         if(selmon->sel)
 780                 unfocus(selmon->sel);
 781         if(c) {
 782                 if(c->mon != selmon)
 783                         selmon = c->mon;
 784                 if(c->isurgent)
 785                         clearurgent(c);
 786                 detachstack(c);
 787                 attachstack(c);
 788                 grabbuttons(c, True);
 789                 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
 790                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 791         }
 792         else
 793                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 794         selmon->sel = c;
 795         drawbars();
 796 }
 797
 798 void
 799 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
 800         XFocusChangeEvent *ev = &e->xfocus;
 801
 802         if(selmon->sel && ev->window != selmon->sel->win)
 803                 XSetInputFocus(dpy, selmon->sel->win, RevertToPointerRoot, CurrentTime);
 804 }
 805
 806 #ifdef XINERAMA
 807 void
 808 focusmon(const Arg *arg) {
 809         Monitor *m;
 810
 811         if(!(m = idxtomon(arg->ui)) || m == selmon)
 812                 return;
 813         unfocus(selmon->sel);
 814         selmon = m;
 815         focus(NULL);
 816 }
 817 #endif /* XINERAMA */
 818
 819 void
 820 focusstack(const Arg *arg) {
 821         Client *c = NULL, *i;
 822
 823         if(!selmon->sel)
 824                 return;
 825         if(arg->i > 0) {
 826                 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
 827                 if(!c)
 828                         for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
 829         }
 830         else {
 831                 for(i = selmon->clients; i != selmon->sel; i = i->next)
 832                         if(ISVISIBLE(i))
 833                                 c = i;
 834                 if(!c)
 835                         for(; i; i = i->next)
 836                                 if(ISVISIBLE(i))
 837                                         c = i;
 838         }
 839         if(c) {
 840                 focus(c);
 841                 restack(selmon);
 842         }
 843 }
 844
 845 unsigned long
 846 getcolor(const char *colstr) {
 847         Colormap cmap = DefaultColormap(dpy, screen);
 848         XColor color;
 849
 850         if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
 851                 die("error, cannot allocate color '%s'\n", colstr);
 852         return color.pixel;
 853 }
 854
 855 Bool
 856 getrootpointer(int *x, int *y) {
 857         int di;
 858         unsigned int dui;
 859         Window dummy;
 860         return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
 861 }
 862
 863 long
 864 getstate(Window w) {
 865         int format, status;
 866         long result = -1;
 867         unsigned char *p = NULL;
 868         unsigned long n, extra;
 869         Atom real;
 870
 871         status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
 872                         &real, &format, &n, &extra, (unsigned char **)&p);
 873         if(status != Success)
 874                 return -1;
 875         if(n != 0)
 876                 result = *p;
 877         XFree(p);
 878         return result;
 879 }
 880
 881 Bool
 882 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
 883         char **list = NULL;
 884         int n;
 885         XTextProperty name;
 886
 887         if(!text || size == 0)
 888                 return False;
 889         text[0] = '\0';
 890         XGetTextProperty(dpy, w, &name, atom);
 891         if(!name.nitems)
 892                 return False;
 893         if(name.encoding == XA_STRING)
 894                 strncpy(text, (char *)name.value, size - 1);
 895         else {
 896                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 897                 && n > 0 && *list) {
 898                         strncpy(text, *list, size - 1);
 899                         XFreeStringList(list);
 900                 }
 901         }
 902         text[size - 1] = '\0';
 903         XFree(name.value);
 904         return True;
 905 }
 906
 907 void
 908 grabbuttons(Client *c, Bool focused) {
 909         updatenumlockmask();
 910         {
 911                 unsigned int i, j;
 912                 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
 913                 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 914                 if(focused) {
 915                         for(i = 0; i < LENGTH(buttons); i++)
 916                                 if(buttons[i].click == ClkClientWin)
 917                                         for(j = 0; j < LENGTH(modifiers); j++)
 918                                                 XGrabButton(dpy, buttons[i].button,
 919                                                             buttons[i].mask | modifiers[j],
 920                                                             c->win, False, BUTTONMASK,
 921                                                             GrabModeAsync, GrabModeSync, None, None);
 922                 } else
 923                         XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
 924                                     BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
 925         }
 926 }
 927
 928 void
 929 grabkeys(void) {
 930         updatenumlockmask();
 931         { /* grab keys */
 932                 unsigned int i, j;
 933                 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
 934                 KeyCode code;
 935
 936                 XUngrabKey(dpy, AnyKey, AnyModifier, root);
 937                 for(i = 0; i < LENGTH(keys); i++) {
 938                         if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
 939                                 for(j = 0; j < LENGTH(modifiers); j++)
 940                                         XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
 941                                                  True, GrabModeAsync, GrabModeAsync);
 942                 }
 943         }
 944 }
 945
 946 Monitor *
 947 idxtomon(unsigned int n) {
 948         unsigned int i;
 949         Monitor *m;
 950
 951         for(m = mons, i = 0; m && i != n; m = m->next, i++);
 952         return m;
 953 }
 954
 955 void
 956 initfont(const char *fontstr) {
 957         char *def, **missing;
 958         int i, n;
 959
 960         missing = NULL;
 961         dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
 962         if(missing) {
 963                 while(n--)
 964                         fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
 965                 XFreeStringList(missing);
 966         }
 967         if(dc.font.set) {
 968                 XFontSetExtents *font_extents;
 969                 XFontStruct **xfonts;
 970                 char **font_names;
 971                 dc.font.ascent = dc.font.descent = 0;
 972                 font_extents = XExtentsOfFontSet(dc.font.set);
 973                 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
 974                 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
 975                         dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
 976                         dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
 977                         xfonts++;
 978                 }
 979         }
 980         else {
 981                 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
 982                 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
 983                         die("error, cannot load font: '%s'\n", fontstr);
 984                 dc.font.ascent = dc.font.xfont->ascent;
 985                 dc.font.descent = dc.font.xfont->descent;
 986         }
 987         dc.font.height = dc.font.ascent + dc.font.descent;
 988 }
 989
 990 Bool
 991 isprotodel(Client *c) {
 992         int i, n;
 993         Atom *protocols;
 994         Bool ret = False;
 995
 996         if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
 997                 for(i = 0; !ret && i < n; i++)
 998                         if(protocols[i] == wmatom[WMDelete])
 999                                 ret = True;
1000                 XFree(protocols);
1001         }
1002         return ret;
1003 }
1004
1005 void
1006 keypress(XEvent *e) {
1007         unsigned int i;
1008         KeySym keysym;
1009         XKeyEvent *ev;
1010
1011         ev = &e->xkey;
1012         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1013         for(i = 0; i < LENGTH(keys); i++)
1014                 if(keysym == keys[i].keysym
1015                    && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1016                    && keys[i].func)
1017                         keys[i].func(&(keys[i].arg));
1018 }
1019
1020 void
1021 killclient(const Arg *arg) {
1022         XEvent ev;
1023
1024         if(!selmon->sel)
1025                 return;
1026         if(isprotodel(selmon->sel)) {
1027                 ev.type = ClientMessage;
1028                 ev.xclient.window = selmon->sel->win;
1029                 ev.xclient.message_type = wmatom[WMProtocols];
1030                 ev.xclient.format = 32;
1031                 ev.xclient.data.l[0] = wmatom[WMDelete];
1032                 ev.xclient.data.l[1] = CurrentTime;
1033                 XSendEvent(dpy, selmon->sel->win, False, NoEventMask, &ev);
1034         }
1035         else
1036                 XKillClient(dpy, selmon->sel->win);
1037 }
1038
1039 void
1040 manage(Window w, XWindowAttributes *wa) {
1041         static Client cz;
1042         Client *c, *t = NULL;
1043         Window trans = None;
1044         XWindowChanges wc;
1045
1046         if(!(c = malloc(sizeof(Client))))
1047                 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1048         *c = cz;
1049         c->win = w;
1050
1051         if(XGetTransientForHint(dpy, w, &trans))
1052                 t = wintoclient(trans);
1053         if(t) {
1054                 c->mon = t->mon;
1055                 c->tags = t->tags;
1056         }
1057         else {
1058                 c->mon = selmon;
1059                 applyrules(c);
1060         }
1061
1062         /* geometry */
1063         c->x = wa->x + c->mon->wx;
1064         c->y = wa->y + c->mon->wy;
1065         c->w = wa->width;
1066         c->h = wa->height;
1067         c->oldbw = wa->border_width;
1068         if(c->w == c->mon->mw && c->h == c->mon->mh) {
1069                 c->x = c->mon->mx;
1070                 c->y = c->mon->my;
1071                 c->bw = 0;
1072         }
1073         else {
1074                 if(c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1075                         c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1076                 if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1077                         c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1078                 c->x = MAX(c->x, c->mon->mx);
1079                 /* only fix client y-offset, if the client center might cover the bar */
1080                 c->y = MAX(c->y, ((c->mon->by == 0) && (c->x + (c->w / 2) >= c->mon->wx)
1081                            && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1082                 c->bw = borderpx;
1083         }
1084
1085         wc.border_width = c->bw;
1086         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1087         XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1088         configure(c); /* propagates border_width, if size doesn't change */
1089         updatesizehints(c);
1090         XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1091         grabbuttons(c, False);
1092         updatetitle(c);
1093         if(!c->isfloating)
1094                 c->isfloating = trans != None || c->isfixed;
1095         if(c->isfloating)
1096                 XRaiseWindow(dpy, c->win);
1097         attach(c);
1098         attachstack(c);
1099         XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1100         XMapWindow(dpy, c->win);
1101         setclientstate(c, NormalState);
1102         arrange();
1103 }
1104
1105 void
1106 mappingnotify(XEvent *e) {
1107         XMappingEvent *ev = &e->xmapping;
1108
1109         XRefreshKeyboardMapping(ev);
1110         if(ev->request == MappingKeyboard)
1111                 grabkeys();
1112 }
1113
1114 void
1115 maprequest(XEvent *e) {
1116         static XWindowAttributes wa;
1117         XMapRequestEvent *ev = &e->xmaprequest;
1118
1119         if(!XGetWindowAttributes(dpy, ev->window, &wa))
1120                 return;
1121         if(wa.override_redirect)
1122                 return;
1123         if(!wintoclient(ev->window))
1124                 manage(ev->window, &wa);
1125 }
1126
1127 void
1128 monocle(Monitor *m) {
1129         Client *c;
1130
1131         for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
1132                 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw);
1133 }
1134
1135 void
1136 movemouse(const Arg *arg) {
1137         int x, y, ocx, ocy, nx, ny;
1138         Client *c;
1139         Monitor *m;
1140         XEvent ev;
1141
1142         if(!(c = selmon->sel))
1143                 return;
1144         restack(selmon);
1145         ocx = c->x;
1146         ocy = c->y;
1147         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1148         None, cursor[CurMove], CurrentTime) != GrabSuccess)
1149                 return;
1150         if(!getrootpointer(&x, &y))
1151                 return;
1152         do {
1153                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1154                 switch (ev.type) {
1155                 case ConfigureRequest:
1156                 case Expose:
1157                 case MapRequest:
1158                         handler[ev.type](&ev);
1159                         break;
1160                 case MotionNotify:
1161                         nx = ocx + (ev.xmotion.x - x);
1162                         ny = ocy + (ev.xmotion.y - y);
1163                         if(snap && nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1164                                 && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1165                                 if(abs(selmon->wx - nx) < snap)
1166                                         nx = selmon->wx;
1167                                 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1168                                         nx = selmon->wx + selmon->ww - WIDTH(c);
1169                                 if(abs(selmon->wy - ny) < snap)
1170                                         ny = selmon->wy;
1171                                 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1172                                         ny = selmon->wy + selmon->wh - HEIGHT(c);
1173                                 if(!c->isfloating && lt[selmon->sellt]->arrange
1174                                                   && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1175                                         togglefloating(NULL);
1176                         }
1177                         if(!lt[selmon->sellt]->arrange || c->isfloating)
1178                                 resize(c, nx, ny, c->w, c->h);
1179                         break;
1180                 }
1181         }
1182         while(ev.type != ButtonRelease);
1183         XUngrabPointer(dpy, CurrentTime);
1184         if((m = pointertomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1185                 sendmon(c, m);
1186                 selmon = m;
1187                 focus(NULL);
1188         }
1189 }
1190
1191 Client *
1192 nexttiled(Client *c) {
1193         for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1194         return c;
1195 }
1196
1197 Monitor *
1198 pointertomon(int x, int y) {
1199         Monitor *m;
1200
1201         for(m = mons; m; m = m->next)
1202                 if(INRECT(x, y, m->wx, m->wy, m->ww, m->wh))
1203                         return m;
1204         return mons;
1205 }
1206
1207 void
1208 propertynotify(XEvent *e) {
1209         Client *c;
1210         Window trans;
1211         XPropertyEvent *ev = &e->xproperty;
1212
1213         if((ev->window == root) && (ev->atom == XA_WM_NAME))
1214                 updatestatus();
1215         else if(ev->state == PropertyDelete)
1216                 return; /* ignore */
1217         else if((c = wintoclient(ev->window))) {
1218                 switch (ev->atom) {
1219                 default: break;
1220                 case XA_WM_TRANSIENT_FOR:
1221                         XGetTransientForHint(dpy, c->win, &trans);
1222                         if(!c->isfloating && (c->isfloating = (wintoclient(trans) != NULL)))
1223                                 arrange();
1224                         break;
1225                 case XA_WM_NORMAL_HINTS:
1226                         updatesizehints(c);
1227                         break;
1228                 case XA_WM_HINTS:
1229                         updatewmhints(c);
1230                         drawbars();
1231                         break;
1232                 }
1233                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1234                         updatetitle(c);
1235                         if(c == selmon->sel)
1236                                 drawbars();
1237                 }
1238         }
1239 }
1240
1241 void
1242 quit(const Arg *arg) {
1243         running = False;
1244 }
1245
1246 void
1247 resize(Client *c, int x, int y, int w, int h) {
1248         XWindowChanges wc;
1249
1250         if(applysizehints(c, &x, &y, &w, &h)) {
1251                 c->x = wc.x = x;
1252                 c->y = wc.y = y;
1253                 c->w = wc.width = w;
1254                 c->h = wc.height = h;
1255                 wc.border_width = c->bw;
1256                 XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1257                 configure(c);
1258                 XSync(dpy, False);
1259         }
1260 }
1261
1262 void
1263 resizemouse(const Arg *arg) {
1264         int ocx, ocy;
1265         int nw, nh;
1266         Client *c;
1267         Monitor *m;
1268         XEvent ev;
1269
1270         if(!(c = selmon->sel))
1271                 return;
1272         restack(selmon);
1273         ocx = c->x;
1274         ocy = c->y;
1275         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1276         None, cursor[CurResize], CurrentTime) != GrabSuccess)
1277                 return;
1278         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1279         do {
1280                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1281                 switch(ev.type) {
1282                 case ConfigureRequest:
1283                 case Expose:
1284                 case MapRequest:
1285                         handler[ev.type](&ev);
1286                         break;
1287                 case MotionNotify:
1288                         nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1289                         nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1290
1291                         if(snap && nw >= selmon->wx && nw <= selmon->wx + selmon->ww
1292                                 && nh >= selmon->wy && nh <= selmon->wy + selmon->wh) {
1293                                 if(!c->isfloating && lt[selmon->sellt]->arrange
1294                                    && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1295                                         togglefloating(NULL);
1296                         }
1297                         if(!lt[selmon->sellt]->arrange || c->isfloating)
1298                                 resize(c, c->x, c->y, nw, nh);
1299                         break;
1300                 }
1301         }
1302         while(ev.type != ButtonRelease);
1303         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1304         XUngrabPointer(dpy, CurrentTime);
1305         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1306         if((m = pointertomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1307                 sendmon(c, m);
1308                 selmon = m;
1309                 focus(NULL);
1310         }
1311 }
1312
1313 void
1314 restack(Monitor *m) {
1315         Client *c;
1316         XEvent ev;
1317         XWindowChanges wc;
1318
1319         drawbars();
1320         if(!m->sel)
1321                 return;
1322         if(m->sel->isfloating || !lt[m->sellt]->arrange)
1323                 XRaiseWindow(dpy, m->sel->win);
1324         if(lt[m->sellt]->arrange) {
1325                 wc.stack_mode = Below;
1326                 wc.sibling = m->barwin;
1327                 for(c = m->stack; c; c = c->snext)
1328                         if(!c->isfloating && ISVISIBLE(c)) {
1329                                 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1330                                 wc.sibling = c->win;
1331                         }
1332         }
1333         XSync(dpy, False);
1334         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1335 }
1336
1337 void
1338 run(void) {
1339         XEvent ev;
1340
1341         /* main event loop */
1342         XSync(dpy, False);
1343         while(running && !XNextEvent(dpy, &ev)) {
1344                 if(handler[ev.type])
1345                         (handler[ev.type])(&ev); /* call handler */
1346         }
1347 }
1348
1349 void
1350 scan(void) {
1351         unsigned int i, num;
1352         Window d1, d2, *wins = NULL;
1353         XWindowAttributes wa;
1354
1355         if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1356                 for(i = 0; i < num; i++) {
1357                         if(!XGetWindowAttributes(dpy, wins[i], &wa)
1358                         || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1359                                 continue;
1360                         if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1361                                 manage(wins[i], &wa);
1362                 }
1363                 for(i = 0; i < num; i++) { /* now the transients */
1364                         if(!XGetWindowAttributes(dpy, wins[i], &wa))
1365                                 continue;
1366                         if(XGetTransientForHint(dpy, wins[i], &d1)
1367                         && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1368                                 manage(wins[i], &wa);
1369                 }
1370                 if(wins)
1371                         XFree(wins);
1372         }
1373 }
1374
1375 void
1376 sendmon(Client *c, Monitor *m) {
1377         if(c->mon == m)
1378                 return;
1379         detach(c);
1380         detachstack(c);
1381         c->mon = m;
1382         c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1383         attach(c);
1384         attachstack(c);
1385         focus(NULL);
1386         arrange();
1387 }
1388
1389 void
1390 setclientstate(Client *c, long state) {
1391         long data[] = {state, None};
1392
1393         XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1394                         PropModeReplace, (unsigned char *)data, 2);
1395 }
1396
1397 void
1398 setlayout(const Arg *arg) {
1399         if(!arg || !arg->v || arg->v != lt[selmon->sellt])
1400                 selmon->sellt ^= 1;
1401         if(arg && arg->v)
1402                 lt[selmon->sellt] = (Layout *)arg->v;
1403         if(selmon->sel)
1404                 arrange();
1405         else
1406                 drawbars();
1407 }
1408
1409 /* arg > 1.0 will set mfact absolutly */
1410 void
1411 setmfact(const Arg *arg) {
1412         float f;
1413
1414         if(!arg || !lt[selmon->sellt]->arrange)
1415                 return;
1416         f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1417         if(f < 0.1 || f > 0.9)
1418                 return;
1419         selmon->mfact = f;
1420         arrange();
1421 }
1422
1423 void
1424 setup(void) {
1425         unsigned int i;
1426         int w;
1427         XSetWindowAttributes wa;
1428
1429         /* init screen */
1430         screen = DefaultScreen(dpy);
1431         root = RootWindow(dpy, screen);
1432         initfont(font);
1433         sw = DisplayWidth(dpy, screen);
1434         sh = DisplayHeight(dpy, screen);
1435         bh = dc.h = dc.font.height + 2;
1436         lt[0] = &layouts[0];
1437         lt[1] = &layouts[1 % LENGTH(layouts)];
1438         updategeom();
1439
1440         /* init atoms */
1441         wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1442         wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1443         wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1444         netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1445         netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1446
1447         /* init cursors */
1448         cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1449         cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1450         cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1451
1452         /* init appearance */
1453         dc.norm[ColBorder] = getcolor(normbordercolor);
1454         dc.norm[ColBG] = getcolor(normbgcolor);
1455         dc.norm[ColFG] = getcolor(normfgcolor);
1456         dc.sel[ColBorder] = getcolor(selbordercolor);
1457         dc.sel[ColBG] = getcolor(selbgcolor);
1458         dc.sel[ColFG] = getcolor(selfgcolor);
1459         dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1460         dc.gc = XCreateGC(dpy, root, 0, NULL);
1461         XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1462         if(!dc.font.set)
1463                 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1464
1465         /* init bars */
1466         for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1467                 w = TEXTW(layouts[i].symbol);
1468                 blw = MAX(blw, w);
1469         }
1470         updatebars();
1471         updatestatus();
1472
1473         /* EWMH support per view */
1474         XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1475                         PropModeReplace, (unsigned char *) netatom, NetLast);
1476
1477         /* select for events */
1478         wa.cursor = cursor[CurNormal];
1479         wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1480                         |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1481                         |PropertyChangeMask;
1482         XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1483         XSelectInput(dpy, root, wa.event_mask);
1484
1485         grabkeys();
1486 }
1487
1488 void
1489 showhide(Client *c) {
1490         if(!c)
1491                 return;
1492         if(ISVISIBLE(c)) { /* show clients top down */
1493                 XMoveWindow(dpy, c->win, c->x, c->y);
1494                 if(!lt[c->mon->sellt]->arrange || c->isfloating)
1495                         resize(c, c->x, c->y, c->w, c->h);
1496                 showhide(c->snext);
1497         }
1498         else { /* hide clients bottom up */
1499                 showhide(c->snext);
1500                 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1501         }
1502 }
1503
1504
1505 void
1506 sigchld(int signal) {
1507         while(0 < waitpid(-1, NULL, WNOHANG));
1508 }
1509
1510 void
1511 spawn(const Arg *arg) {
1512         signal(SIGCHLD, sigchld);
1513         if(fork() == 0) {
1514                 if(dpy)
1515                         close(ConnectionNumber(dpy));
1516                 setsid();
1517                 execvp(((char **)arg->v)[0], (char **)arg->v);
1518                 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1519                 perror(" failed");
1520                 exit(0);
1521         }
1522 }
1523
1524 void
1525 tag(const Arg *arg) {
1526         if(selmon->sel && arg->ui & TAGMASK) {
1527                 selmon->sel->tags = arg->ui & TAGMASK;
1528                 arrange();
1529         }
1530 }
1531
1532 #ifdef XINERAMA
1533 void
1534 tagmon(const Arg *arg) {
1535         Monitor *m;
1536
1537         if(!selmon->sel || !(m = idxtomon(arg->ui)))
1538                 return;
1539         sendmon(selmon->sel, m);
1540 }
1541 #endif /* XINERAMA */
1542
1543 int
1544 textnw(const char *text, unsigned int len) {
1545         XRectangle r;
1546
1547         if(dc.font.set) {
1548                 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1549                 return r.width;
1550         }
1551         return XTextWidth(dc.font.xfont, text, len);
1552 }
1553
1554 void
1555 tile(Monitor *m) {
1556         int x, y, h, w, mw;
1557         unsigned int i, n;
1558         Client *c;
1559
1560         for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1561         if(n == 0)
1562                 return;
1563
1564         /* master */
1565         c = nexttiled(m->clients);
1566         mw = m->mfact * m->ww;
1567         resize(c, m->wx, m->wy, (n == 1 ? m->ww : mw) - 2 * c->bw, m->wh - 2 * c->bw);
1568
1569         if(--n == 0)
1570                 return;
1571
1572         /* tile stack */
1573         x = (m->wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : m->wx + mw;
1574         y = m->wy;
1575         w = (m->wx + mw > c->x + c->w) ? m->wx + m->ww - x : m->ww - mw;
1576         h = m->wh / n;
1577         if(h < bh)
1578                 h = m->wh;
1579
1580         for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1581                 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1582                        ? m->wy + m->wh - y - 2 * c->bw : h - 2 * c->bw));
1583                 if(h != m->wh)
1584                         y = c->y + HEIGHT(c);
1585         }
1586 }
1587
1588 void
1589 togglebar(const Arg *arg) {
1590         selmon->showbar = !selmon->showbar;
1591         updatebarpos(selmon);
1592         XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1593         arrange();
1594 }
1595
1596 void
1597 togglefloating(const Arg *arg) {
1598         if(!selmon->sel)
1599                 return;
1600         selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1601         if(selmon->sel->isfloating)
1602                 resize(selmon->sel, selmon->sel->x, selmon->sel->y, selmon->sel->w, selmon->sel->h);
1603         arrange();
1604 }
1605
1606 void
1607 toggletag(const Arg *arg) {
1608         unsigned int mask;
1609
1610         if(!selmon->sel)
1611                 return;
1612
1613         mask = selmon->sel->tags ^ (arg->ui & TAGMASK);
1614         if(mask) {
1615                 selmon->sel->tags = mask;
1616                 arrange();
1617         }
1618 }
1619
1620 void
1621 toggleview(const Arg *arg) {
1622         unsigned int mask = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1623
1624         if(mask) {
1625                 selmon->tagset[selmon->seltags] = mask;
1626                 arrange();
1627         }
1628 }
1629
1630 void
1631 unfocus(Client *c) {
1632         if(!c)
1633                 return;
1634         grabbuttons(c, False);
1635         XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
1636         XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1637 }
1638
1639 void
1640 unmanage(Client *c) {
1641         XWindowChanges wc;
1642
1643         wc.border_width = c->oldbw;
1644         /* The server grab construct avoids race conditions. */
1645         XGrabServer(dpy);
1646         XSetErrorHandler(xerrordummy);
1647         XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1648         detach(c);
1649         detachstack(c);
1650         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1651         setclientstate(c, WithdrawnState);
1652         free(c);
1653         XSync(dpy, False);
1654         XSetErrorHandler(xerror);
1655         XUngrabServer(dpy);
1656         focus(NULL);
1657         arrange();
1658 }
1659
1660 void
1661 unmapnotify(XEvent *e) {
1662         Client *c;
1663         XUnmapEvent *ev = &e->xunmap;
1664
1665         if((c = wintoclient(ev->window)))
1666                 unmanage(c);
1667 }
1668
1669 void
1670 updatebars(void) {
1671         Monitor *m;
1672         XSetWindowAttributes wa;
1673
1674         wa.override_redirect = True;
1675         wa.background_pixmap = ParentRelative;
1676         wa.event_mask = ButtonPressMask|ExposureMask;
1677
1678         for(m = mons; m; m = m->next) {
1679                 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1680
1681                                           CopyFromParent, DefaultVisual(dpy, screen),
1682                                           CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1683                 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1684                 XMapRaised(dpy, m->barwin);
1685         }
1686 }
1687
1688 void
1689 updatebarpos(Monitor *m) {
1690         m->wy = m->my;
1691         m->wh = m->mh;
1692         if(m->showbar) {
1693                 m->wh -= bh;
1694                 m->by = m->topbar ? m->wy : m->wy + m->wh;
1695                 m->wy = m->topbar ? m->wy + bh : m->wy;
1696         }
1697         else
1698                 m->by = -bh;
1699 }
1700
1701 void
1702 updategeom(void) {
1703         int i, n = 1;
1704         Client *c;
1705         Monitor *newmons = NULL, *m, *tm;
1706
1707 #ifdef XINERAMA
1708         XineramaScreenInfo *info = NULL;
1709
1710         if(XineramaIsActive(dpy))
1711                 info = XineramaQueryScreens(dpy, &n);
1712 #endif /* XINERAMA */
1713         /* allocate monitor(s) for the new geometry setup */
1714         for(i = 0; i < n; i++) {
1715                 m = (Monitor *)malloc(sizeof(Monitor));
1716                 m->next = newmons;
1717                 newmons = m;
1718         }
1719
1720         /* initialise monitor(s) */
1721 #ifdef XINERAMA
1722         if(XineramaIsActive(dpy)) {
1723                 for(i = 0, m = newmons; m; m = m->next, i++) {
1724                         m->screen_number = info[i].screen_number;
1725                         m->mx = m->wx = info[i].x_org;
1726                         m->my = m->wy = info[i].y_org;
1727                         m->mw = m->ww = info[i].width;
1728                         m->mh = m->wh = info[i].height;
1729                 }
1730                 XFree(info);
1731         }
1732         else
1733 #endif /* XINERAMA */
1734         /* default monitor setup */
1735         {
1736                 m->screen_number = 0;
1737                 m->wx = 0;
1738                 m->my = m->wy = 0;
1739                 m->ww = sw;
1740                 m->mh = m->wh = sh;
1741         }
1742
1743         /* bar geometry setup */
1744         for(m = newmons; m; m = m->next) {
1745                 m->sel = m->stack = m->clients = NULL;
1746                 m->seltags = 0;
1747                 m->sellt = 0;
1748                 m->tagset[0] = m->tagset[1] = 1;
1749                 m->mfact = mfact;
1750                 m->showbar = SHOWBAR;
1751                 m->topbar = TOPBAR;
1752                 updatebarpos(m);
1753         }
1754
1755         /* reassign left over clients of disappeared monitors */
1756         for(tm = mons; tm; tm = tm->next)
1757                 while(tm->clients) {
1758                         c = tm->clients;
1759                         tm->clients = c->next;
1760                         detachstack(c);
1761                         c->mon = newmons;
1762                         attach(c);
1763                         attachstack(c);
1764                 }
1765
1766         /* select focused monitor */
1767         cleanupmons();
1768         mons = newmons;
1769         selmon = wintomon(root);
1770 }
1771
1772 void
1773 updatenumlockmask(void) {
1774         unsigned int i, j;
1775         XModifierKeymap *modmap;
1776
1777         numlockmask = 0;
1778         modmap = XGetModifierMapping(dpy);
1779         for(i = 0; i < 8; i++)
1780                 for(j = 0; j < modmap->max_keypermod; j++)
1781                         if(modmap->modifiermap[i * modmap->max_keypermod + j]
1782                            == XKeysymToKeycode(dpy, XK_Num_Lock))
1783                                 numlockmask = (1 << i);
1784         XFreeModifiermap(modmap);
1785 }
1786
1787 void
1788 updatesizehints(Client *c) {
1789         long msize;
1790         XSizeHints size;
1791
1792         if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1793                 /* size is uninitialized, ensure that size.flags aren't used */
1794                 size.flags = PSize;
1795         if(size.flags & PBaseSize) {
1796                 c->basew = size.base_width;
1797                 c->baseh = size.base_height;
1798         }
1799         else if(size.flags & PMinSize) {
1800                 c->basew = size.min_width;
1801                 c->baseh = size.min_height;
1802         }
1803         else
1804                 c->basew = c->baseh = 0;
1805         if(size.flags & PResizeInc) {
1806                 c->incw = size.width_inc;
1807                 c->inch = size.height_inc;
1808         }
1809         else
1810                 c->incw = c->inch = 0;
1811         if(size.flags & PMaxSize) {
1812                 c->maxw = size.max_width;
1813                 c->maxh = size.max_height;
1814         }
1815         else
1816                 c->maxw = c->maxh = 0;
1817         if(size.flags & PMinSize) {
1818                 c->minw = size.min_width;
1819                 c->minh = size.min_height;
1820         }
1821         else if(size.flags & PBaseSize) {
1822                 c->minw = size.base_width;
1823                 c->minh = size.base_height;
1824         }
1825         else
1826                 c->minw = c->minh = 0;
1827         if(size.flags & PAspect) {
1828                 c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
1829                 c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
1830         }
1831         else
1832                 c->maxa = c->mina = 0.0;
1833         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1834                      && c->maxw == c->minw && c->maxh == c->minh);
1835 }
1836
1837 void
1838 updatetitle(Client *c) {
1839         if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1840                 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1841 }
1842
1843 void
1844 updatestatus(void) {
1845         if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1846                 strcpy(stext, "dwm-"VERSION);
1847         drawbar(selmon);
1848 }
1849
1850 void
1851 updatewmhints(Client *c) {
1852         XWMHints *wmh;
1853
1854         if((wmh = XGetWMHints(dpy, c->win))) {
1855                 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
1856                         wmh->flags &= ~XUrgencyHint;
1857                         XSetWMHints(dpy, c->win, wmh);
1858                 }
1859                 else
1860                         c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1861
1862                 XFree(wmh);
1863         }
1864 }
1865
1866 void
1867 view(const Arg *arg) {
1868         if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
1869                 return;
1870         selmon->seltags ^= 1; /* toggle sel tagset */
1871         if(arg->ui & TAGMASK)
1872                 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
1873         arrange();
1874 }
1875
1876 Client *
1877 wintoclient(Window w) {
1878         Client *c;
1879         Monitor *m;
1880
1881         for(m = mons; m; m = m->next)
1882                 for(c = m->clients; c; c = c->next)
1883                         if(c->win == w)
1884                                 return c;
1885         return NULL;
1886 }
1887
1888 Monitor *
1889 wintomon(Window w) {
1890         int x, y;
1891         Client *c;
1892         Monitor *m;
1893
1894         if(w == root && getrootpointer(&x, &y))
1895                 return pointertomon(x, y);
1896         for(m = mons; m; m = m->next)
1897                 if(w == m->barwin)
1898                         return m;
1899         if((c = wintoclient(w)))
1900                 return c->mon;
1901         return mons;
1902 }
1903
1904 /* There's no way to check accesses to destroyed windows, thus those cases are
1905  * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
1906  * default error handler, which may call exit.  */
1907 int
1908 xerror(Display *dpy, XErrorEvent *ee) {
1909         if(ee->error_code == BadWindow
1910         || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1911         || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1912         || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1913         || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1914         || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1915         || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1916         || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1917         || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1918                 return 0;
1919         fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1920                         ee->request_code, ee->error_code);
1921         return xerrorxlib(dpy, ee); /* may call exit */
1922 }
1923
1924 int
1925 xerrordummy(Display *dpy, XErrorEvent *ee) {
1926         return 0;
1927 }
1928
1929 /* Startup Error handler to check if another window manager
1930  * is already running. */
1931 int
1932 xerrorstart(Display *dpy, XErrorEvent *ee) {
1933         otherwm = True;
1934         return -1;
1935 }
1936
1937 void
1938 zoom(const Arg *arg) {
1939         Client *c = selmon->sel;
1940
1941         if(!lt[selmon->sellt]->arrange || lt[selmon->sellt]->arrange == monocle || (selmon->sel && selmon->sel->isfloating))
1942                 return;
1943         if(c == nexttiled(selmon->clients))
1944                 if(!c || !(c = nexttiled(c->next)))
1945                         return;
1946         detach(c);
1947         attach(c);
1948         focus(c);
1949         arrange();
1950 }
1951
1952 int
1953 main(int argc, char *argv[]) {
1954         if(argc == 2 && !strcmp("-v", argv[1]))
1955                 die("dwm-"VERSION", © 2006-2009 dwm engineers, see LICENSE for details\n");
1956         else if(argc != 1)
1957                 die("usage: dwm [-v]\n");
1958
1959         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1960                 fputs("warning: no locale support\n", stderr);
1961
1962         if(!(dpy = XOpenDisplay(NULL)))
1963                 die("dwm: cannot open display\n");
1964
1965         checkotherwm();
1966         setup();
1967         scan();
1968         run();
1969         cleanup();
1970
1971         XCloseDisplay(dpy);
1972         return 0;
1973 }