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